1 // SPDX-License-Identifier: GPL-2.0
3 * NVMe over Fabrics RDMA target.
4 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/atomic.h>
8 #include <linux/ctype.h>
9 #include <linux/delay.h>
10 #include <linux/err.h>
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/nvme.h>
14 #include <linux/slab.h>
15 #include <linux/string.h>
16 #include <linux/wait.h>
17 #include <linux/inet.h>
18 #include <asm/unaligned.h>
20 #include <rdma/ib_verbs.h>
21 #include <rdma/rdma_cm.h>
24 #include <linux/nvme-rdma.h>
28 * We allow at least 1 page, up to 4 SGEs, and up to 16KB of inline data
30 #define NVMET_RDMA_DEFAULT_INLINE_DATA_SIZE PAGE_SIZE
31 #define NVMET_RDMA_MAX_INLINE_SGE 4
32 #define NVMET_RDMA_MAX_INLINE_DATA_SIZE max_t(int, SZ_16K, PAGE_SIZE)
34 struct nvmet_rdma_cmd {
35 struct ib_sge sge[NVMET_RDMA_MAX_INLINE_SGE + 1];
38 struct scatterlist inline_sg[NVMET_RDMA_MAX_INLINE_SGE];
39 struct nvme_command *nvme_cmd;
40 struct nvmet_rdma_queue *queue;
44 NVMET_RDMA_REQ_INLINE_DATA = (1 << 0),
45 NVMET_RDMA_REQ_INVALIDATE_RKEY = (1 << 1),
48 struct nvmet_rdma_rsp {
49 struct ib_sge send_sge;
50 struct ib_cqe send_cqe;
51 struct ib_send_wr send_wr;
53 struct nvmet_rdma_cmd *cmd;
54 struct nvmet_rdma_queue *queue;
56 struct ib_cqe read_cqe;
57 struct rdma_rw_ctx rw;
66 struct list_head wait_list;
67 struct list_head free_list;
70 enum nvmet_rdma_queue_state {
71 NVMET_RDMA_Q_CONNECTING,
73 NVMET_RDMA_Q_DISCONNECTING,
76 struct nvmet_rdma_queue {
77 struct rdma_cm_id *cm_id;
78 struct nvmet_port *port;
81 struct nvmet_rdma_device *dev;
82 spinlock_t state_lock;
83 enum nvmet_rdma_queue_state state;
84 struct nvmet_cq nvme_cq;
85 struct nvmet_sq nvme_sq;
87 struct nvmet_rdma_rsp *rsps;
88 struct list_head free_rsps;
90 struct nvmet_rdma_cmd *cmds;
92 struct work_struct release_work;
93 struct list_head rsp_wait_list;
94 struct list_head rsp_wr_wait_list;
95 spinlock_t rsp_wr_wait_lock;
102 struct list_head queue_list;
105 struct nvmet_rdma_device {
106 struct ib_device *device;
109 struct nvmet_rdma_cmd *srq_cmds;
112 struct list_head entry;
113 int inline_data_size;
114 int inline_page_count;
117 static bool nvmet_rdma_use_srq;
118 module_param_named(use_srq, nvmet_rdma_use_srq, bool, 0444);
119 MODULE_PARM_DESC(use_srq, "Use shared receive queue.");
121 static DEFINE_IDA(nvmet_rdma_queue_ida);
122 static LIST_HEAD(nvmet_rdma_queue_list);
123 static DEFINE_MUTEX(nvmet_rdma_queue_mutex);
125 static LIST_HEAD(device_list);
126 static DEFINE_MUTEX(device_list_mutex);
128 static bool nvmet_rdma_execute_command(struct nvmet_rdma_rsp *rsp);
129 static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc);
130 static void nvmet_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc);
131 static void nvmet_rdma_read_data_done(struct ib_cq *cq, struct ib_wc *wc);
132 static void nvmet_rdma_qp_event(struct ib_event *event, void *priv);
133 static void nvmet_rdma_queue_disconnect(struct nvmet_rdma_queue *queue);
134 static void nvmet_rdma_free_rsp(struct nvmet_rdma_device *ndev,
135 struct nvmet_rdma_rsp *r);
136 static int nvmet_rdma_alloc_rsp(struct nvmet_rdma_device *ndev,
137 struct nvmet_rdma_rsp *r);
139 static const struct nvmet_fabrics_ops nvmet_rdma_ops;
141 static int num_pages(int len)
143 return 1 + (((len - 1) & PAGE_MASK) >> PAGE_SHIFT);
146 static inline bool nvmet_rdma_need_data_in(struct nvmet_rdma_rsp *rsp)
148 return nvme_is_write(rsp->req.cmd) &&
149 rsp->req.transfer_len &&
150 !(rsp->flags & NVMET_RDMA_REQ_INLINE_DATA);
153 static inline bool nvmet_rdma_need_data_out(struct nvmet_rdma_rsp *rsp)
155 return !nvme_is_write(rsp->req.cmd) &&
156 rsp->req.transfer_len &&
157 !rsp->req.cqe->status &&
158 !(rsp->flags & NVMET_RDMA_REQ_INLINE_DATA);
161 static inline struct nvmet_rdma_rsp *
162 nvmet_rdma_get_rsp(struct nvmet_rdma_queue *queue)
164 struct nvmet_rdma_rsp *rsp;
167 spin_lock_irqsave(&queue->rsps_lock, flags);
168 rsp = list_first_entry_or_null(&queue->free_rsps,
169 struct nvmet_rdma_rsp, free_list);
171 list_del(&rsp->free_list);
172 spin_unlock_irqrestore(&queue->rsps_lock, flags);
174 if (unlikely(!rsp)) {
177 rsp = kzalloc(sizeof(*rsp), GFP_KERNEL);
180 ret = nvmet_rdma_alloc_rsp(queue->dev, rsp);
186 rsp->allocated = true;
193 nvmet_rdma_put_rsp(struct nvmet_rdma_rsp *rsp)
197 if (unlikely(rsp->allocated)) {
198 nvmet_rdma_free_rsp(rsp->queue->dev, rsp);
203 spin_lock_irqsave(&rsp->queue->rsps_lock, flags);
204 list_add_tail(&rsp->free_list, &rsp->queue->free_rsps);
205 spin_unlock_irqrestore(&rsp->queue->rsps_lock, flags);
208 static void nvmet_rdma_free_inline_pages(struct nvmet_rdma_device *ndev,
209 struct nvmet_rdma_cmd *c)
211 struct scatterlist *sg;
215 if (!ndev->inline_data_size)
221 for (i = 0; i < ndev->inline_page_count; i++, sg++, sge++) {
223 ib_dma_unmap_page(ndev->device, sge->addr,
224 sge->length, DMA_FROM_DEVICE);
226 __free_page(sg_page(sg));
230 static int nvmet_rdma_alloc_inline_pages(struct nvmet_rdma_device *ndev,
231 struct nvmet_rdma_cmd *c)
233 struct scatterlist *sg;
239 if (!ndev->inline_data_size)
243 sg_init_table(sg, ndev->inline_page_count);
245 len = ndev->inline_data_size;
247 for (i = 0; i < ndev->inline_page_count; i++, sg++, sge++) {
248 pg = alloc_page(GFP_KERNEL);
251 sg_assign_page(sg, pg);
252 sge->addr = ib_dma_map_page(ndev->device,
253 pg, 0, PAGE_SIZE, DMA_FROM_DEVICE);
254 if (ib_dma_mapping_error(ndev->device, sge->addr))
256 sge->length = min_t(int, len, PAGE_SIZE);
257 sge->lkey = ndev->pd->local_dma_lkey;
263 for (; i >= 0; i--, sg--, sge--) {
265 ib_dma_unmap_page(ndev->device, sge->addr,
266 sge->length, DMA_FROM_DEVICE);
268 __free_page(sg_page(sg));
273 static int nvmet_rdma_alloc_cmd(struct nvmet_rdma_device *ndev,
274 struct nvmet_rdma_cmd *c, bool admin)
276 /* NVMe command / RDMA RECV */
277 c->nvme_cmd = kmalloc(sizeof(*c->nvme_cmd), GFP_KERNEL);
281 c->sge[0].addr = ib_dma_map_single(ndev->device, c->nvme_cmd,
282 sizeof(*c->nvme_cmd), DMA_FROM_DEVICE);
283 if (ib_dma_mapping_error(ndev->device, c->sge[0].addr))
286 c->sge[0].length = sizeof(*c->nvme_cmd);
287 c->sge[0].lkey = ndev->pd->local_dma_lkey;
289 if (!admin && nvmet_rdma_alloc_inline_pages(ndev, c))
292 c->cqe.done = nvmet_rdma_recv_done;
294 c->wr.wr_cqe = &c->cqe;
295 c->wr.sg_list = c->sge;
296 c->wr.num_sge = admin ? 1 : ndev->inline_page_count + 1;
301 ib_dma_unmap_single(ndev->device, c->sge[0].addr,
302 sizeof(*c->nvme_cmd), DMA_FROM_DEVICE);
310 static void nvmet_rdma_free_cmd(struct nvmet_rdma_device *ndev,
311 struct nvmet_rdma_cmd *c, bool admin)
314 nvmet_rdma_free_inline_pages(ndev, c);
315 ib_dma_unmap_single(ndev->device, c->sge[0].addr,
316 sizeof(*c->nvme_cmd), DMA_FROM_DEVICE);
320 static struct nvmet_rdma_cmd *
321 nvmet_rdma_alloc_cmds(struct nvmet_rdma_device *ndev,
322 int nr_cmds, bool admin)
324 struct nvmet_rdma_cmd *cmds;
325 int ret = -EINVAL, i;
327 cmds = kcalloc(nr_cmds, sizeof(struct nvmet_rdma_cmd), GFP_KERNEL);
331 for (i = 0; i < nr_cmds; i++) {
332 ret = nvmet_rdma_alloc_cmd(ndev, cmds + i, admin);
341 nvmet_rdma_free_cmd(ndev, cmds + i, admin);
347 static void nvmet_rdma_free_cmds(struct nvmet_rdma_device *ndev,
348 struct nvmet_rdma_cmd *cmds, int nr_cmds, bool admin)
352 for (i = 0; i < nr_cmds; i++)
353 nvmet_rdma_free_cmd(ndev, cmds + i, admin);
357 static int nvmet_rdma_alloc_rsp(struct nvmet_rdma_device *ndev,
358 struct nvmet_rdma_rsp *r)
360 /* NVMe CQE / RDMA SEND */
361 r->req.cqe = kmalloc(sizeof(*r->req.cqe), GFP_KERNEL);
365 r->send_sge.addr = ib_dma_map_single(ndev->device, r->req.cqe,
366 sizeof(*r->req.cqe), DMA_TO_DEVICE);
367 if (ib_dma_mapping_error(ndev->device, r->send_sge.addr))
370 r->req.p2p_client = &ndev->device->dev;
371 r->send_sge.length = sizeof(*r->req.cqe);
372 r->send_sge.lkey = ndev->pd->local_dma_lkey;
374 r->send_cqe.done = nvmet_rdma_send_done;
376 r->send_wr.wr_cqe = &r->send_cqe;
377 r->send_wr.sg_list = &r->send_sge;
378 r->send_wr.num_sge = 1;
379 r->send_wr.send_flags = IB_SEND_SIGNALED;
381 /* Data In / RDMA READ */
382 r->read_cqe.done = nvmet_rdma_read_data_done;
391 static void nvmet_rdma_free_rsp(struct nvmet_rdma_device *ndev,
392 struct nvmet_rdma_rsp *r)
394 ib_dma_unmap_single(ndev->device, r->send_sge.addr,
395 sizeof(*r->req.cqe), DMA_TO_DEVICE);
400 nvmet_rdma_alloc_rsps(struct nvmet_rdma_queue *queue)
402 struct nvmet_rdma_device *ndev = queue->dev;
403 int nr_rsps = queue->recv_queue_size * 2;
404 int ret = -EINVAL, i;
406 queue->rsps = kcalloc(nr_rsps, sizeof(struct nvmet_rdma_rsp),
411 for (i = 0; i < nr_rsps; i++) {
412 struct nvmet_rdma_rsp *rsp = &queue->rsps[i];
414 ret = nvmet_rdma_alloc_rsp(ndev, rsp);
418 list_add_tail(&rsp->free_list, &queue->free_rsps);
425 struct nvmet_rdma_rsp *rsp = &queue->rsps[i];
427 list_del(&rsp->free_list);
428 nvmet_rdma_free_rsp(ndev, rsp);
435 static void nvmet_rdma_free_rsps(struct nvmet_rdma_queue *queue)
437 struct nvmet_rdma_device *ndev = queue->dev;
438 int i, nr_rsps = queue->recv_queue_size * 2;
440 for (i = 0; i < nr_rsps; i++) {
441 struct nvmet_rdma_rsp *rsp = &queue->rsps[i];
443 list_del(&rsp->free_list);
444 nvmet_rdma_free_rsp(ndev, rsp);
449 static int nvmet_rdma_post_recv(struct nvmet_rdma_device *ndev,
450 struct nvmet_rdma_cmd *cmd)
454 ib_dma_sync_single_for_device(ndev->device,
455 cmd->sge[0].addr, cmd->sge[0].length,
459 ret = ib_post_srq_recv(ndev->srq, &cmd->wr, NULL);
461 ret = ib_post_recv(cmd->queue->cm_id->qp, &cmd->wr, NULL);
464 pr_err("post_recv cmd failed\n");
469 static void nvmet_rdma_process_wr_wait_list(struct nvmet_rdma_queue *queue)
471 spin_lock(&queue->rsp_wr_wait_lock);
472 while (!list_empty(&queue->rsp_wr_wait_list)) {
473 struct nvmet_rdma_rsp *rsp;
476 rsp = list_entry(queue->rsp_wr_wait_list.next,
477 struct nvmet_rdma_rsp, wait_list);
478 list_del(&rsp->wait_list);
480 spin_unlock(&queue->rsp_wr_wait_lock);
481 ret = nvmet_rdma_execute_command(rsp);
482 spin_lock(&queue->rsp_wr_wait_lock);
485 list_add(&rsp->wait_list, &queue->rsp_wr_wait_list);
489 spin_unlock(&queue->rsp_wr_wait_lock);
493 static void nvmet_rdma_release_rsp(struct nvmet_rdma_rsp *rsp)
495 struct nvmet_rdma_queue *queue = rsp->queue;
497 atomic_add(1 + rsp->n_rdma, &queue->sq_wr_avail);
500 rdma_rw_ctx_destroy(&rsp->rw, queue->cm_id->qp,
501 queue->cm_id->port_num, rsp->req.sg,
502 rsp->req.sg_cnt, nvmet_data_dir(&rsp->req));
505 if (rsp->req.sg != rsp->cmd->inline_sg)
506 nvmet_req_free_sgl(&rsp->req);
508 if (unlikely(!list_empty_careful(&queue->rsp_wr_wait_list)))
509 nvmet_rdma_process_wr_wait_list(queue);
511 nvmet_rdma_put_rsp(rsp);
514 static void nvmet_rdma_error_comp(struct nvmet_rdma_queue *queue)
516 if (queue->nvme_sq.ctrl) {
517 nvmet_ctrl_fatal_error(queue->nvme_sq.ctrl);
520 * we didn't setup the controller yet in case
521 * of admin connect error, just disconnect and
524 nvmet_rdma_queue_disconnect(queue);
528 static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc)
530 struct nvmet_rdma_rsp *rsp =
531 container_of(wc->wr_cqe, struct nvmet_rdma_rsp, send_cqe);
532 struct nvmet_rdma_queue *queue = cq->cq_context;
534 nvmet_rdma_release_rsp(rsp);
536 if (unlikely(wc->status != IB_WC_SUCCESS &&
537 wc->status != IB_WC_WR_FLUSH_ERR)) {
538 pr_err("SEND for CQE 0x%p failed with status %s (%d).\n",
539 wc->wr_cqe, ib_wc_status_msg(wc->status), wc->status);
540 nvmet_rdma_error_comp(queue);
544 static void nvmet_rdma_queue_response(struct nvmet_req *req)
546 struct nvmet_rdma_rsp *rsp =
547 container_of(req, struct nvmet_rdma_rsp, req);
548 struct rdma_cm_id *cm_id = rsp->queue->cm_id;
549 struct ib_send_wr *first_wr;
551 if (rsp->flags & NVMET_RDMA_REQ_INVALIDATE_RKEY) {
552 rsp->send_wr.opcode = IB_WR_SEND_WITH_INV;
553 rsp->send_wr.ex.invalidate_rkey = rsp->invalidate_rkey;
555 rsp->send_wr.opcode = IB_WR_SEND;
558 if (nvmet_rdma_need_data_out(rsp))
559 first_wr = rdma_rw_ctx_wrs(&rsp->rw, cm_id->qp,
560 cm_id->port_num, NULL, &rsp->send_wr);
562 first_wr = &rsp->send_wr;
564 nvmet_rdma_post_recv(rsp->queue->dev, rsp->cmd);
566 ib_dma_sync_single_for_device(rsp->queue->dev->device,
567 rsp->send_sge.addr, rsp->send_sge.length,
570 if (unlikely(ib_post_send(cm_id->qp, first_wr, NULL))) {
571 pr_err("sending cmd response failed\n");
572 nvmet_rdma_release_rsp(rsp);
576 static void nvmet_rdma_read_data_done(struct ib_cq *cq, struct ib_wc *wc)
578 struct nvmet_rdma_rsp *rsp =
579 container_of(wc->wr_cqe, struct nvmet_rdma_rsp, read_cqe);
580 struct nvmet_rdma_queue *queue = cq->cq_context;
582 WARN_ON(rsp->n_rdma <= 0);
583 atomic_add(rsp->n_rdma, &queue->sq_wr_avail);
584 rdma_rw_ctx_destroy(&rsp->rw, queue->cm_id->qp,
585 queue->cm_id->port_num, rsp->req.sg,
586 rsp->req.sg_cnt, nvmet_data_dir(&rsp->req));
589 if (unlikely(wc->status != IB_WC_SUCCESS)) {
590 nvmet_req_uninit(&rsp->req);
591 nvmet_rdma_release_rsp(rsp);
592 if (wc->status != IB_WC_WR_FLUSH_ERR) {
593 pr_info("RDMA READ for CQE 0x%p failed with status %s (%d).\n",
594 wc->wr_cqe, ib_wc_status_msg(wc->status), wc->status);
595 nvmet_rdma_error_comp(queue);
600 rsp->req.execute(&rsp->req);
603 static void nvmet_rdma_use_inline_sg(struct nvmet_rdma_rsp *rsp, u32 len,
606 int sg_count = num_pages(len);
607 struct scatterlist *sg;
610 sg = rsp->cmd->inline_sg;
611 for (i = 0; i < sg_count; i++, sg++) {
612 if (i < sg_count - 1)
617 sg->length = min_t(int, len, PAGE_SIZE - off);
623 rsp->req.sg = rsp->cmd->inline_sg;
624 rsp->req.sg_cnt = sg_count;
627 static u16 nvmet_rdma_map_sgl_inline(struct nvmet_rdma_rsp *rsp)
629 struct nvme_sgl_desc *sgl = &rsp->req.cmd->common.dptr.sgl;
630 u64 off = le64_to_cpu(sgl->addr);
631 u32 len = le32_to_cpu(sgl->length);
633 if (!nvme_is_write(rsp->req.cmd)) {
635 offsetof(struct nvme_common_command, opcode);
636 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
639 if (off + len > rsp->queue->dev->inline_data_size) {
640 pr_err("invalid inline data offset!\n");
641 return NVME_SC_SGL_INVALID_OFFSET | NVME_SC_DNR;
644 /* no data command? */
648 nvmet_rdma_use_inline_sg(rsp, len, off);
649 rsp->flags |= NVMET_RDMA_REQ_INLINE_DATA;
650 rsp->req.transfer_len += len;
654 static u16 nvmet_rdma_map_sgl_keyed(struct nvmet_rdma_rsp *rsp,
655 struct nvme_keyed_sgl_desc *sgl, bool invalidate)
657 struct rdma_cm_id *cm_id = rsp->queue->cm_id;
658 u64 addr = le64_to_cpu(sgl->addr);
659 u32 key = get_unaligned_le32(sgl->key);
662 rsp->req.transfer_len = get_unaligned_le24(sgl->length);
664 /* no data command? */
665 if (!rsp->req.transfer_len)
668 ret = nvmet_req_alloc_sgl(&rsp->req);
669 if (unlikely(ret < 0))
672 ret = rdma_rw_ctx_init(&rsp->rw, cm_id->qp, cm_id->port_num,
673 rsp->req.sg, rsp->req.sg_cnt, 0, addr, key,
674 nvmet_data_dir(&rsp->req));
675 if (unlikely(ret < 0))
680 rsp->invalidate_rkey = key;
681 rsp->flags |= NVMET_RDMA_REQ_INVALIDATE_RKEY;
687 rsp->req.transfer_len = 0;
688 return NVME_SC_INTERNAL;
691 static u16 nvmet_rdma_map_sgl(struct nvmet_rdma_rsp *rsp)
693 struct nvme_keyed_sgl_desc *sgl = &rsp->req.cmd->common.dptr.ksgl;
695 switch (sgl->type >> 4) {
696 case NVME_SGL_FMT_DATA_DESC:
697 switch (sgl->type & 0xf) {
698 case NVME_SGL_FMT_OFFSET:
699 return nvmet_rdma_map_sgl_inline(rsp);
701 pr_err("invalid SGL subtype: %#x\n", sgl->type);
703 offsetof(struct nvme_common_command, dptr);
704 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
706 case NVME_KEY_SGL_FMT_DATA_DESC:
707 switch (sgl->type & 0xf) {
708 case NVME_SGL_FMT_ADDRESS | NVME_SGL_FMT_INVALIDATE:
709 return nvmet_rdma_map_sgl_keyed(rsp, sgl, true);
710 case NVME_SGL_FMT_ADDRESS:
711 return nvmet_rdma_map_sgl_keyed(rsp, sgl, false);
713 pr_err("invalid SGL subtype: %#x\n", sgl->type);
715 offsetof(struct nvme_common_command, dptr);
716 return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
719 pr_err("invalid SGL type: %#x\n", sgl->type);
720 rsp->req.error_loc = offsetof(struct nvme_common_command, dptr);
721 return NVME_SC_SGL_INVALID_TYPE | NVME_SC_DNR;
725 static bool nvmet_rdma_execute_command(struct nvmet_rdma_rsp *rsp)
727 struct nvmet_rdma_queue *queue = rsp->queue;
729 if (unlikely(atomic_sub_return(1 + rsp->n_rdma,
730 &queue->sq_wr_avail) < 0)) {
731 pr_debug("IB send queue full (needed %d): queue %u cntlid %u\n",
732 1 + rsp->n_rdma, queue->idx,
733 queue->nvme_sq.ctrl->cntlid);
734 atomic_add(1 + rsp->n_rdma, &queue->sq_wr_avail);
738 if (nvmet_rdma_need_data_in(rsp)) {
739 if (rdma_rw_ctx_post(&rsp->rw, queue->cm_id->qp,
740 queue->cm_id->port_num, &rsp->read_cqe, NULL))
741 nvmet_req_complete(&rsp->req, NVME_SC_DATA_XFER_ERROR);
743 rsp->req.execute(&rsp->req);
749 static void nvmet_rdma_handle_command(struct nvmet_rdma_queue *queue,
750 struct nvmet_rdma_rsp *cmd)
754 ib_dma_sync_single_for_cpu(queue->dev->device,
755 cmd->cmd->sge[0].addr, cmd->cmd->sge[0].length,
757 ib_dma_sync_single_for_cpu(queue->dev->device,
758 cmd->send_sge.addr, cmd->send_sge.length,
761 if (!nvmet_req_init(&cmd->req, &queue->nvme_cq,
762 &queue->nvme_sq, &nvmet_rdma_ops))
765 status = nvmet_rdma_map_sgl(cmd);
769 if (unlikely(!nvmet_rdma_execute_command(cmd))) {
770 spin_lock(&queue->rsp_wr_wait_lock);
771 list_add_tail(&cmd->wait_list, &queue->rsp_wr_wait_list);
772 spin_unlock(&queue->rsp_wr_wait_lock);
778 nvmet_req_complete(&cmd->req, status);
781 static void nvmet_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc)
783 struct nvmet_rdma_cmd *cmd =
784 container_of(wc->wr_cqe, struct nvmet_rdma_cmd, cqe);
785 struct nvmet_rdma_queue *queue = cq->cq_context;
786 struct nvmet_rdma_rsp *rsp;
788 if (unlikely(wc->status != IB_WC_SUCCESS)) {
789 if (wc->status != IB_WC_WR_FLUSH_ERR) {
790 pr_err("RECV for CQE 0x%p failed with status %s (%d)\n",
791 wc->wr_cqe, ib_wc_status_msg(wc->status),
793 nvmet_rdma_error_comp(queue);
798 if (unlikely(wc->byte_len < sizeof(struct nvme_command))) {
799 pr_err("Ctrl Fatal Error: capsule size less than 64 bytes\n");
800 nvmet_rdma_error_comp(queue);
805 rsp = nvmet_rdma_get_rsp(queue);
806 if (unlikely(!rsp)) {
808 * we get here only under memory pressure,
809 * silently drop and have the host retry
810 * as we can't even fail it.
812 nvmet_rdma_post_recv(queue->dev, cmd);
818 rsp->req.cmd = cmd->nvme_cmd;
819 rsp->req.port = queue->port;
822 if (unlikely(queue->state != NVMET_RDMA_Q_LIVE)) {
825 spin_lock_irqsave(&queue->state_lock, flags);
826 if (queue->state == NVMET_RDMA_Q_CONNECTING)
827 list_add_tail(&rsp->wait_list, &queue->rsp_wait_list);
829 nvmet_rdma_put_rsp(rsp);
830 spin_unlock_irqrestore(&queue->state_lock, flags);
834 nvmet_rdma_handle_command(queue, rsp);
837 static void nvmet_rdma_destroy_srq(struct nvmet_rdma_device *ndev)
842 nvmet_rdma_free_cmds(ndev, ndev->srq_cmds, ndev->srq_size, false);
843 ib_destroy_srq(ndev->srq);
846 static int nvmet_rdma_init_srq(struct nvmet_rdma_device *ndev)
848 struct ib_srq_init_attr srq_attr = { NULL, };
853 srq_size = 4095; /* XXX: tune */
855 srq_attr.attr.max_wr = srq_size;
856 srq_attr.attr.max_sge = 1 + ndev->inline_page_count;
857 srq_attr.attr.srq_limit = 0;
858 srq_attr.srq_type = IB_SRQT_BASIC;
859 srq = ib_create_srq(ndev->pd, &srq_attr);
862 * If SRQs aren't supported we just go ahead and use normal
863 * non-shared receive queues.
865 pr_info("SRQ requested but not supported.\n");
869 ndev->srq_cmds = nvmet_rdma_alloc_cmds(ndev, srq_size, false);
870 if (IS_ERR(ndev->srq_cmds)) {
871 ret = PTR_ERR(ndev->srq_cmds);
872 goto out_destroy_srq;
876 ndev->srq_size = srq_size;
878 for (i = 0; i < srq_size; i++) {
879 ret = nvmet_rdma_post_recv(ndev, &ndev->srq_cmds[i]);
887 nvmet_rdma_free_cmds(ndev, ndev->srq_cmds, ndev->srq_size, false);
893 static void nvmet_rdma_free_dev(struct kref *ref)
895 struct nvmet_rdma_device *ndev =
896 container_of(ref, struct nvmet_rdma_device, ref);
898 mutex_lock(&device_list_mutex);
899 list_del(&ndev->entry);
900 mutex_unlock(&device_list_mutex);
902 nvmet_rdma_destroy_srq(ndev);
903 ib_dealloc_pd(ndev->pd);
908 static struct nvmet_rdma_device *
909 nvmet_rdma_find_get_device(struct rdma_cm_id *cm_id)
911 struct nvmet_port *port = cm_id->context;
912 struct nvmet_rdma_device *ndev;
913 int inline_page_count;
914 int inline_sge_count;
917 mutex_lock(&device_list_mutex);
918 list_for_each_entry(ndev, &device_list, entry) {
919 if (ndev->device->node_guid == cm_id->device->node_guid &&
920 kref_get_unless_zero(&ndev->ref))
924 ndev = kzalloc(sizeof(*ndev), GFP_KERNEL);
928 inline_page_count = num_pages(port->inline_data_size);
929 inline_sge_count = max(cm_id->device->attrs.max_sge_rd,
930 cm_id->device->attrs.max_recv_sge) - 1;
931 if (inline_page_count > inline_sge_count) {
932 pr_warn("inline_data_size %d cannot be supported by device %s. Reducing to %lu.\n",
933 port->inline_data_size, cm_id->device->name,
934 inline_sge_count * PAGE_SIZE);
935 port->inline_data_size = inline_sge_count * PAGE_SIZE;
936 inline_page_count = inline_sge_count;
938 ndev->inline_data_size = port->inline_data_size;
939 ndev->inline_page_count = inline_page_count;
940 ndev->device = cm_id->device;
941 kref_init(&ndev->ref);
943 ndev->pd = ib_alloc_pd(ndev->device, 0);
944 if (IS_ERR(ndev->pd))
947 if (nvmet_rdma_use_srq) {
948 ret = nvmet_rdma_init_srq(ndev);
953 list_add(&ndev->entry, &device_list);
955 mutex_unlock(&device_list_mutex);
956 pr_debug("added %s.\n", ndev->device->name);
960 ib_dealloc_pd(ndev->pd);
964 mutex_unlock(&device_list_mutex);
968 static int nvmet_rdma_create_queue_ib(struct nvmet_rdma_queue *queue)
970 struct ib_qp_init_attr qp_attr;
971 struct nvmet_rdma_device *ndev = queue->dev;
972 int comp_vector, nr_cqe, ret, i;
975 * Spread the io queues across completion vectors,
976 * but still keep all admin queues on vector 0.
978 comp_vector = !queue->host_qid ? 0 :
979 queue->idx % ndev->device->num_comp_vectors;
982 * Reserve CQ slots for RECV + RDMA_READ/RDMA_WRITE + RDMA_SEND.
984 nr_cqe = queue->recv_queue_size + 2 * queue->send_queue_size;
986 queue->cq = ib_alloc_cq(ndev->device, queue,
987 nr_cqe + 1, comp_vector,
989 if (IS_ERR(queue->cq)) {
990 ret = PTR_ERR(queue->cq);
991 pr_err("failed to create CQ cqe= %d ret= %d\n",
996 memset(&qp_attr, 0, sizeof(qp_attr));
997 qp_attr.qp_context = queue;
998 qp_attr.event_handler = nvmet_rdma_qp_event;
999 qp_attr.send_cq = queue->cq;
1000 qp_attr.recv_cq = queue->cq;
1001 qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
1002 qp_attr.qp_type = IB_QPT_RC;
1004 qp_attr.cap.max_send_wr = queue->send_queue_size + 1;
1005 qp_attr.cap.max_rdma_ctxs = queue->send_queue_size;
1006 qp_attr.cap.max_send_sge = max(ndev->device->attrs.max_sge_rd,
1007 ndev->device->attrs.max_send_sge);
1010 qp_attr.srq = ndev->srq;
1013 qp_attr.cap.max_recv_wr = 1 + queue->recv_queue_size;
1014 qp_attr.cap.max_recv_sge = 1 + ndev->inline_page_count;
1017 ret = rdma_create_qp(queue->cm_id, ndev->pd, &qp_attr);
1019 pr_err("failed to create_qp ret= %d\n", ret);
1020 goto err_destroy_cq;
1023 atomic_set(&queue->sq_wr_avail, qp_attr.cap.max_send_wr);
1025 pr_debug("%s: max_cqe= %d max_sge= %d sq_size = %d cm_id= %p\n",
1026 __func__, queue->cq->cqe, qp_attr.cap.max_send_sge,
1027 qp_attr.cap.max_send_wr, queue->cm_id);
1030 for (i = 0; i < queue->recv_queue_size; i++) {
1031 queue->cmds[i].queue = queue;
1032 ret = nvmet_rdma_post_recv(ndev, &queue->cmds[i]);
1034 goto err_destroy_qp;
1042 rdma_destroy_qp(queue->cm_id);
1044 ib_free_cq(queue->cq);
1048 static void nvmet_rdma_destroy_queue_ib(struct nvmet_rdma_queue *queue)
1050 struct ib_qp *qp = queue->cm_id->qp;
1053 rdma_destroy_id(queue->cm_id);
1055 ib_free_cq(queue->cq);
1058 static void nvmet_rdma_free_queue(struct nvmet_rdma_queue *queue)
1060 pr_debug("freeing queue %d\n", queue->idx);
1062 nvmet_sq_destroy(&queue->nvme_sq);
1064 nvmet_rdma_destroy_queue_ib(queue);
1065 if (!queue->dev->srq) {
1066 nvmet_rdma_free_cmds(queue->dev, queue->cmds,
1067 queue->recv_queue_size,
1070 nvmet_rdma_free_rsps(queue);
1071 ida_simple_remove(&nvmet_rdma_queue_ida, queue->idx);
1075 static void nvmet_rdma_release_queue_work(struct work_struct *w)
1077 struct nvmet_rdma_queue *queue =
1078 container_of(w, struct nvmet_rdma_queue, release_work);
1079 struct nvmet_rdma_device *dev = queue->dev;
1081 nvmet_rdma_free_queue(queue);
1083 kref_put(&dev->ref, nvmet_rdma_free_dev);
1087 nvmet_rdma_parse_cm_connect_req(struct rdma_conn_param *conn,
1088 struct nvmet_rdma_queue *queue)
1090 struct nvme_rdma_cm_req *req;
1092 req = (struct nvme_rdma_cm_req *)conn->private_data;
1093 if (!req || conn->private_data_len == 0)
1094 return NVME_RDMA_CM_INVALID_LEN;
1096 if (le16_to_cpu(req->recfmt) != NVME_RDMA_CM_FMT_1_0)
1097 return NVME_RDMA_CM_INVALID_RECFMT;
1099 queue->host_qid = le16_to_cpu(req->qid);
1102 * req->hsqsize corresponds to our recv queue size plus 1
1103 * req->hrqsize corresponds to our send queue size
1105 queue->recv_queue_size = le16_to_cpu(req->hsqsize) + 1;
1106 queue->send_queue_size = le16_to_cpu(req->hrqsize);
1108 if (!queue->host_qid && queue->recv_queue_size > NVME_AQ_DEPTH)
1109 return NVME_RDMA_CM_INVALID_HSQSIZE;
1111 /* XXX: Should we enforce some kind of max for IO queues? */
1116 static int nvmet_rdma_cm_reject(struct rdma_cm_id *cm_id,
1117 enum nvme_rdma_cm_status status)
1119 struct nvme_rdma_cm_rej rej;
1121 pr_debug("rejecting connect request: status %d (%s)\n",
1122 status, nvme_rdma_cm_msg(status));
1124 rej.recfmt = cpu_to_le16(NVME_RDMA_CM_FMT_1_0);
1125 rej.sts = cpu_to_le16(status);
1127 return rdma_reject(cm_id, (void *)&rej, sizeof(rej));
1130 static struct nvmet_rdma_queue *
1131 nvmet_rdma_alloc_queue(struct nvmet_rdma_device *ndev,
1132 struct rdma_cm_id *cm_id,
1133 struct rdma_cm_event *event)
1135 struct nvmet_rdma_queue *queue;
1138 queue = kzalloc(sizeof(*queue), GFP_KERNEL);
1140 ret = NVME_RDMA_CM_NO_RSC;
1144 ret = nvmet_sq_init(&queue->nvme_sq);
1146 ret = NVME_RDMA_CM_NO_RSC;
1147 goto out_free_queue;
1150 ret = nvmet_rdma_parse_cm_connect_req(&event->param.conn, queue);
1152 goto out_destroy_sq;
1155 * Schedules the actual release because calling rdma_destroy_id from
1156 * inside a CM callback would trigger a deadlock. (great API design..)
1158 INIT_WORK(&queue->release_work, nvmet_rdma_release_queue_work);
1160 queue->cm_id = cm_id;
1162 spin_lock_init(&queue->state_lock);
1163 queue->state = NVMET_RDMA_Q_CONNECTING;
1164 INIT_LIST_HEAD(&queue->rsp_wait_list);
1165 INIT_LIST_HEAD(&queue->rsp_wr_wait_list);
1166 spin_lock_init(&queue->rsp_wr_wait_lock);
1167 INIT_LIST_HEAD(&queue->free_rsps);
1168 spin_lock_init(&queue->rsps_lock);
1169 INIT_LIST_HEAD(&queue->queue_list);
1171 queue->idx = ida_simple_get(&nvmet_rdma_queue_ida, 0, 0, GFP_KERNEL);
1172 if (queue->idx < 0) {
1173 ret = NVME_RDMA_CM_NO_RSC;
1174 goto out_destroy_sq;
1177 ret = nvmet_rdma_alloc_rsps(queue);
1179 ret = NVME_RDMA_CM_NO_RSC;
1180 goto out_ida_remove;
1184 queue->cmds = nvmet_rdma_alloc_cmds(ndev,
1185 queue->recv_queue_size,
1187 if (IS_ERR(queue->cmds)) {
1188 ret = NVME_RDMA_CM_NO_RSC;
1189 goto out_free_responses;
1193 ret = nvmet_rdma_create_queue_ib(queue);
1195 pr_err("%s: creating RDMA queue failed (%d).\n",
1197 ret = NVME_RDMA_CM_NO_RSC;
1205 nvmet_rdma_free_cmds(queue->dev, queue->cmds,
1206 queue->recv_queue_size,
1210 nvmet_rdma_free_rsps(queue);
1212 ida_simple_remove(&nvmet_rdma_queue_ida, queue->idx);
1214 nvmet_sq_destroy(&queue->nvme_sq);
1218 nvmet_rdma_cm_reject(cm_id, ret);
1222 static void nvmet_rdma_qp_event(struct ib_event *event, void *priv)
1224 struct nvmet_rdma_queue *queue = priv;
1226 switch (event->event) {
1227 case IB_EVENT_COMM_EST:
1228 rdma_notify(queue->cm_id, event->event);
1231 pr_err("received IB QP event: %s (%d)\n",
1232 ib_event_msg(event->event), event->event);
1237 static int nvmet_rdma_cm_accept(struct rdma_cm_id *cm_id,
1238 struct nvmet_rdma_queue *queue,
1239 struct rdma_conn_param *p)
1241 struct rdma_conn_param param = { };
1242 struct nvme_rdma_cm_rep priv = { };
1245 param.rnr_retry_count = 7;
1246 param.flow_control = 1;
1247 param.initiator_depth = min_t(u8, p->initiator_depth,
1248 queue->dev->device->attrs.max_qp_init_rd_atom);
1249 param.private_data = &priv;
1250 param.private_data_len = sizeof(priv);
1251 priv.recfmt = cpu_to_le16(NVME_RDMA_CM_FMT_1_0);
1252 priv.crqsize = cpu_to_le16(queue->recv_queue_size);
1254 ret = rdma_accept(cm_id, ¶m);
1256 pr_err("rdma_accept failed (error code = %d)\n", ret);
1261 static int nvmet_rdma_queue_connect(struct rdma_cm_id *cm_id,
1262 struct rdma_cm_event *event)
1264 struct nvmet_rdma_device *ndev;
1265 struct nvmet_rdma_queue *queue;
1268 ndev = nvmet_rdma_find_get_device(cm_id);
1270 nvmet_rdma_cm_reject(cm_id, NVME_RDMA_CM_NO_RSC);
1271 return -ECONNREFUSED;
1274 queue = nvmet_rdma_alloc_queue(ndev, cm_id, event);
1279 queue->port = cm_id->context;
1281 if (queue->host_qid == 0) {
1282 /* Let inflight controller teardown complete */
1283 flush_scheduled_work();
1286 ret = nvmet_rdma_cm_accept(cm_id, queue, &event->param.conn);
1288 schedule_work(&queue->release_work);
1289 /* Destroying rdma_cm id is not needed here */
1293 mutex_lock(&nvmet_rdma_queue_mutex);
1294 list_add_tail(&queue->queue_list, &nvmet_rdma_queue_list);
1295 mutex_unlock(&nvmet_rdma_queue_mutex);
1300 kref_put(&ndev->ref, nvmet_rdma_free_dev);
1305 static void nvmet_rdma_queue_established(struct nvmet_rdma_queue *queue)
1307 unsigned long flags;
1309 spin_lock_irqsave(&queue->state_lock, flags);
1310 if (queue->state != NVMET_RDMA_Q_CONNECTING) {
1311 pr_warn("trying to establish a connected queue\n");
1314 queue->state = NVMET_RDMA_Q_LIVE;
1316 while (!list_empty(&queue->rsp_wait_list)) {
1317 struct nvmet_rdma_rsp *cmd;
1319 cmd = list_first_entry(&queue->rsp_wait_list,
1320 struct nvmet_rdma_rsp, wait_list);
1321 list_del(&cmd->wait_list);
1323 spin_unlock_irqrestore(&queue->state_lock, flags);
1324 nvmet_rdma_handle_command(queue, cmd);
1325 spin_lock_irqsave(&queue->state_lock, flags);
1329 spin_unlock_irqrestore(&queue->state_lock, flags);
1332 static void __nvmet_rdma_queue_disconnect(struct nvmet_rdma_queue *queue)
1334 bool disconnect = false;
1335 unsigned long flags;
1337 pr_debug("cm_id= %p queue->state= %d\n", queue->cm_id, queue->state);
1339 spin_lock_irqsave(&queue->state_lock, flags);
1340 switch (queue->state) {
1341 case NVMET_RDMA_Q_CONNECTING:
1342 case NVMET_RDMA_Q_LIVE:
1343 queue->state = NVMET_RDMA_Q_DISCONNECTING;
1346 case NVMET_RDMA_Q_DISCONNECTING:
1349 spin_unlock_irqrestore(&queue->state_lock, flags);
1352 rdma_disconnect(queue->cm_id);
1353 schedule_work(&queue->release_work);
1357 static void nvmet_rdma_queue_disconnect(struct nvmet_rdma_queue *queue)
1359 bool disconnect = false;
1361 mutex_lock(&nvmet_rdma_queue_mutex);
1362 if (!list_empty(&queue->queue_list)) {
1363 list_del_init(&queue->queue_list);
1366 mutex_unlock(&nvmet_rdma_queue_mutex);
1369 __nvmet_rdma_queue_disconnect(queue);
1372 static void nvmet_rdma_queue_connect_fail(struct rdma_cm_id *cm_id,
1373 struct nvmet_rdma_queue *queue)
1375 WARN_ON_ONCE(queue->state != NVMET_RDMA_Q_CONNECTING);
1377 mutex_lock(&nvmet_rdma_queue_mutex);
1378 if (!list_empty(&queue->queue_list))
1379 list_del_init(&queue->queue_list);
1380 mutex_unlock(&nvmet_rdma_queue_mutex);
1382 pr_err("failed to connect queue %d\n", queue->idx);
1383 schedule_work(&queue->release_work);
1387 * nvme_rdma_device_removal() - Handle RDMA device removal
1388 * @cm_id: rdma_cm id, used for nvmet port
1389 * @queue: nvmet rdma queue (cm id qp_context)
1391 * DEVICE_REMOVAL event notifies us that the RDMA device is about
1392 * to unplug. Note that this event can be generated on a normal
1393 * queue cm_id and/or a device bound listener cm_id (where in this
1394 * case queue will be null).
1396 * We registered an ib_client to handle device removal for queues,
1397 * so we only need to handle the listening port cm_ids. In this case
1398 * we nullify the priv to prevent double cm_id destruction and destroying
1399 * the cm_id implicitely by returning a non-zero rc to the callout.
1401 static int nvmet_rdma_device_removal(struct rdma_cm_id *cm_id,
1402 struct nvmet_rdma_queue *queue)
1404 struct nvmet_port *port;
1408 * This is a queue cm_id. we have registered
1409 * an ib_client to handle queues removal
1410 * so don't interfear and just return.
1415 port = cm_id->context;
1418 * This is a listener cm_id. Make sure that
1419 * future remove_port won't invoke a double
1420 * cm_id destroy. use atomic xchg to make sure
1421 * we don't compete with remove_port.
1423 if (xchg(&port->priv, NULL) != cm_id)
1427 * We need to return 1 so that the core will destroy
1428 * it's own ID. What a great API design..
1433 static int nvmet_rdma_cm_handler(struct rdma_cm_id *cm_id,
1434 struct rdma_cm_event *event)
1436 struct nvmet_rdma_queue *queue = NULL;
1440 queue = cm_id->qp->qp_context;
1442 pr_debug("%s (%d): status %d id %p\n",
1443 rdma_event_msg(event->event), event->event,
1444 event->status, cm_id);
1446 switch (event->event) {
1447 case RDMA_CM_EVENT_CONNECT_REQUEST:
1448 ret = nvmet_rdma_queue_connect(cm_id, event);
1450 case RDMA_CM_EVENT_ESTABLISHED:
1451 nvmet_rdma_queue_established(queue);
1453 case RDMA_CM_EVENT_ADDR_CHANGE:
1454 case RDMA_CM_EVENT_DISCONNECTED:
1455 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
1456 nvmet_rdma_queue_disconnect(queue);
1458 case RDMA_CM_EVENT_DEVICE_REMOVAL:
1459 ret = nvmet_rdma_device_removal(cm_id, queue);
1461 case RDMA_CM_EVENT_REJECTED:
1462 pr_debug("Connection rejected: %s\n",
1463 rdma_reject_msg(cm_id, event->status));
1465 case RDMA_CM_EVENT_UNREACHABLE:
1466 case RDMA_CM_EVENT_CONNECT_ERROR:
1467 nvmet_rdma_queue_connect_fail(cm_id, queue);
1470 pr_err("received unrecognized RDMA CM event %d\n",
1478 static void nvmet_rdma_delete_ctrl(struct nvmet_ctrl *ctrl)
1480 struct nvmet_rdma_queue *queue;
1483 mutex_lock(&nvmet_rdma_queue_mutex);
1484 list_for_each_entry(queue, &nvmet_rdma_queue_list, queue_list) {
1485 if (queue->nvme_sq.ctrl == ctrl) {
1486 list_del_init(&queue->queue_list);
1487 mutex_unlock(&nvmet_rdma_queue_mutex);
1489 __nvmet_rdma_queue_disconnect(queue);
1493 mutex_unlock(&nvmet_rdma_queue_mutex);
1496 static int nvmet_rdma_add_port(struct nvmet_port *port)
1498 struct rdma_cm_id *cm_id;
1499 struct sockaddr_storage addr = { };
1500 __kernel_sa_family_t af;
1503 switch (port->disc_addr.adrfam) {
1504 case NVMF_ADDR_FAMILY_IP4:
1507 case NVMF_ADDR_FAMILY_IP6:
1511 pr_err("address family %d not supported\n",
1512 port->disc_addr.adrfam);
1516 if (port->inline_data_size < 0) {
1517 port->inline_data_size = NVMET_RDMA_DEFAULT_INLINE_DATA_SIZE;
1518 } else if (port->inline_data_size > NVMET_RDMA_MAX_INLINE_DATA_SIZE) {
1519 pr_warn("inline_data_size %u is too large, reducing to %u\n",
1520 port->inline_data_size,
1521 NVMET_RDMA_MAX_INLINE_DATA_SIZE);
1522 port->inline_data_size = NVMET_RDMA_MAX_INLINE_DATA_SIZE;
1525 ret = inet_pton_with_scope(&init_net, af, port->disc_addr.traddr,
1526 port->disc_addr.trsvcid, &addr);
1528 pr_err("malformed ip/port passed: %s:%s\n",
1529 port->disc_addr.traddr, port->disc_addr.trsvcid);
1533 cm_id = rdma_create_id(&init_net, nvmet_rdma_cm_handler, port,
1534 RDMA_PS_TCP, IB_QPT_RC);
1535 if (IS_ERR(cm_id)) {
1536 pr_err("CM ID creation failed\n");
1537 return PTR_ERR(cm_id);
1541 * Allow both IPv4 and IPv6 sockets to bind a single port
1544 ret = rdma_set_afonly(cm_id, 1);
1546 pr_err("rdma_set_afonly failed (%d)\n", ret);
1547 goto out_destroy_id;
1550 ret = rdma_bind_addr(cm_id, (struct sockaddr *)&addr);
1552 pr_err("binding CM ID to %pISpcs failed (%d)\n",
1553 (struct sockaddr *)&addr, ret);
1554 goto out_destroy_id;
1557 ret = rdma_listen(cm_id, 128);
1559 pr_err("listening to %pISpcs failed (%d)\n",
1560 (struct sockaddr *)&addr, ret);
1561 goto out_destroy_id;
1564 pr_info("enabling port %d (%pISpcs)\n",
1565 le16_to_cpu(port->disc_addr.portid), (struct sockaddr *)&addr);
1570 rdma_destroy_id(cm_id);
1574 static void nvmet_rdma_remove_port(struct nvmet_port *port)
1576 struct rdma_cm_id *cm_id = xchg(&port->priv, NULL);
1579 rdma_destroy_id(cm_id);
1582 static void nvmet_rdma_disc_port_addr(struct nvmet_req *req,
1583 struct nvmet_port *port, char *traddr)
1585 struct rdma_cm_id *cm_id = port->priv;
1587 if (inet_addr_is_any((struct sockaddr *)&cm_id->route.addr.src_addr)) {
1588 struct nvmet_rdma_rsp *rsp =
1589 container_of(req, struct nvmet_rdma_rsp, req);
1590 struct rdma_cm_id *req_cm_id = rsp->queue->cm_id;
1591 struct sockaddr *addr = (void *)&req_cm_id->route.addr.src_addr;
1593 sprintf(traddr, "%pISc", addr);
1595 memcpy(traddr, port->disc_addr.traddr, NVMF_TRADDR_SIZE);
1599 static const struct nvmet_fabrics_ops nvmet_rdma_ops = {
1600 .owner = THIS_MODULE,
1601 .type = NVMF_TRTYPE_RDMA,
1603 .has_keyed_sgls = 1,
1604 .add_port = nvmet_rdma_add_port,
1605 .remove_port = nvmet_rdma_remove_port,
1606 .queue_response = nvmet_rdma_queue_response,
1607 .delete_ctrl = nvmet_rdma_delete_ctrl,
1608 .disc_traddr = nvmet_rdma_disc_port_addr,
1611 static void nvmet_rdma_remove_one(struct ib_device *ib_device, void *client_data)
1613 struct nvmet_rdma_queue *queue, *tmp;
1614 struct nvmet_rdma_device *ndev;
1617 mutex_lock(&device_list_mutex);
1618 list_for_each_entry(ndev, &device_list, entry) {
1619 if (ndev->device == ib_device) {
1624 mutex_unlock(&device_list_mutex);
1630 * IB Device that is used by nvmet controllers is being removed,
1631 * delete all queues using this device.
1633 mutex_lock(&nvmet_rdma_queue_mutex);
1634 list_for_each_entry_safe(queue, tmp, &nvmet_rdma_queue_list,
1636 if (queue->dev->device != ib_device)
1639 pr_info("Removing queue %d\n", queue->idx);
1640 list_del_init(&queue->queue_list);
1641 __nvmet_rdma_queue_disconnect(queue);
1643 mutex_unlock(&nvmet_rdma_queue_mutex);
1645 flush_scheduled_work();
1648 static struct ib_client nvmet_rdma_ib_client = {
1649 .name = "nvmet_rdma",
1650 .remove = nvmet_rdma_remove_one
1653 static int __init nvmet_rdma_init(void)
1657 ret = ib_register_client(&nvmet_rdma_ib_client);
1661 ret = nvmet_register_transport(&nvmet_rdma_ops);
1668 ib_unregister_client(&nvmet_rdma_ib_client);
1672 static void __exit nvmet_rdma_exit(void)
1674 nvmet_unregister_transport(&nvmet_rdma_ops);
1675 ib_unregister_client(&nvmet_rdma_ib_client);
1676 WARN_ON_ONCE(!list_empty(&nvmet_rdma_queue_list));
1677 ida_destroy(&nvmet_rdma_queue_ida);
1680 module_init(nvmet_rdma_init);
1681 module_exit(nvmet_rdma_exit);
1683 MODULE_LICENSE("GPL v2");
1684 MODULE_ALIAS("nvmet-transport-1"); /* 1 == NVMF_TRTYPE_RDMA */