Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a4cf0443 UB |
2 | /* |
3 | * Shared Memory Communications over RDMA (SMC-R) and RoCE | |
4 | * | |
5 | * IB infrastructure: | |
6 | * Establish SMC-R as an Infiniband Client to be notified about added and | |
7 | * removed IB devices of type RDMA. | |
8 | * Determine device and port characteristics for these IB devices. | |
9 | * | |
10 | * Copyright IBM Corp. 2016 | |
11 | * | |
12 | * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> | |
13 | */ | |
14 | ||
15 | #include <linux/random.h> | |
bd4ad577 | 16 | #include <linux/workqueue.h> |
10428dd8 | 17 | #include <linux/scatterlist.h> |
a4cf0443 UB |
18 | #include <rdma/ib_verbs.h> |
19 | ||
6812baab | 20 | #include "smc_pnet.h" |
a4cf0443 | 21 | #include "smc_ib.h" |
cd6851f3 | 22 | #include "smc_core.h" |
f38ba179 | 23 | #include "smc_wr.h" |
a4cf0443 UB |
24 | #include "smc.h" |
25 | ||
bd4ad577 UB |
26 | #define SMC_QP_MIN_RNR_TIMER 5 |
27 | #define SMC_QP_TIMEOUT 15 /* 4096 * 2 ** timeout usec */ | |
28 | #define SMC_QP_RETRY_CNT 7 /* 7: infinite */ | |
29 | #define SMC_QP_RNR_RETRY 7 /* 7: infinite */ | |
30 | ||
a4cf0443 UB |
31 | struct smc_ib_devices smc_ib_devices = { /* smc-registered ib devices */ |
32 | .lock = __SPIN_LOCK_UNLOCKED(smc_ib_devices.lock), | |
33 | .list = LIST_HEAD_INIT(smc_ib_devices.list), | |
34 | }; | |
35 | ||
36 | #define SMC_LOCAL_SYSTEMID_RESET "%%%%%%%" | |
37 | ||
38 | u8 local_systemid[SMC_SYSTEMID_LEN] = SMC_LOCAL_SYSTEMID_RESET; /* unique system | |
39 | * identifier | |
40 | */ | |
41 | ||
bd4ad577 UB |
42 | static int smc_ib_modify_qp_init(struct smc_link *lnk) |
43 | { | |
44 | struct ib_qp_attr qp_attr; | |
45 | ||
46 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
47 | qp_attr.qp_state = IB_QPS_INIT; | |
48 | qp_attr.pkey_index = 0; | |
49 | qp_attr.port_num = lnk->ibport; | |
50 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
51 | | IB_ACCESS_REMOTE_WRITE; | |
52 | return ib_modify_qp(lnk->roce_qp, &qp_attr, | |
53 | IB_QP_STATE | IB_QP_PKEY_INDEX | | |
54 | IB_QP_ACCESS_FLAGS | IB_QP_PORT); | |
55 | } | |
56 | ||
57 | static int smc_ib_modify_qp_rtr(struct smc_link *lnk) | |
58 | { | |
59 | enum ib_qp_attr_mask qp_attr_mask = | |
60 | IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | IB_QP_DEST_QPN | | |
61 | IB_QP_RQ_PSN | IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; | |
62 | struct ib_qp_attr qp_attr; | |
63 | ||
64 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
65 | qp_attr.qp_state = IB_QPS_RTR; | |
66 | qp_attr.path_mtu = min(lnk->path_mtu, lnk->peer_mtu); | |
44c58487 | 67 | qp_attr.ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE; |
d8966fcd DC |
68 | rdma_ah_set_port_num(&qp_attr.ah_attr, lnk->ibport); |
69 | rdma_ah_set_grh(&qp_attr.ah_attr, NULL, 0, 0, 1, 0); | |
70 | rdma_ah_set_dgid_raw(&qp_attr.ah_attr, lnk->peer_gid); | |
44c58487 | 71 | memcpy(&qp_attr.ah_attr.roce.dmac, lnk->peer_mac, |
bd4ad577 UB |
72 | sizeof(lnk->peer_mac)); |
73 | qp_attr.dest_qp_num = lnk->peer_qpn; | |
74 | qp_attr.rq_psn = lnk->peer_psn; /* starting receive packet seq # */ | |
75 | qp_attr.max_dest_rd_atomic = 1; /* max # of resources for incoming | |
76 | * requests | |
77 | */ | |
78 | qp_attr.min_rnr_timer = SMC_QP_MIN_RNR_TIMER; | |
79 | ||
80 | return ib_modify_qp(lnk->roce_qp, &qp_attr, qp_attr_mask); | |
81 | } | |
82 | ||
83 | int smc_ib_modify_qp_rts(struct smc_link *lnk) | |
84 | { | |
85 | struct ib_qp_attr qp_attr; | |
86 | ||
87 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
88 | qp_attr.qp_state = IB_QPS_RTS; | |
89 | qp_attr.timeout = SMC_QP_TIMEOUT; /* local ack timeout */ | |
90 | qp_attr.retry_cnt = SMC_QP_RETRY_CNT; /* retry count */ | |
91 | qp_attr.rnr_retry = SMC_QP_RNR_RETRY; /* RNR retries, 7=infinite */ | |
92 | qp_attr.sq_psn = lnk->psn_initial; /* starting send packet seq # */ | |
93 | qp_attr.max_rd_atomic = 1; /* # of outstanding RDMA reads and | |
94 | * atomic ops allowed | |
95 | */ | |
96 | return ib_modify_qp(lnk->roce_qp, &qp_attr, | |
97 | IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
98 | IB_QP_SQ_PSN | IB_QP_RNR_RETRY | | |
99 | IB_QP_MAX_QP_RD_ATOMIC); | |
100 | } | |
101 | ||
102 | int smc_ib_modify_qp_reset(struct smc_link *lnk) | |
103 | { | |
104 | struct ib_qp_attr qp_attr; | |
105 | ||
106 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
107 | qp_attr.qp_state = IB_QPS_RESET; | |
108 | return ib_modify_qp(lnk->roce_qp, &qp_attr, IB_QP_STATE); | |
109 | } | |
110 | ||
111 | int smc_ib_ready_link(struct smc_link *lnk) | |
112 | { | |
113 | struct smc_link_group *lgr = | |
114 | container_of(lnk, struct smc_link_group, lnk[0]); | |
115 | int rc = 0; | |
116 | ||
117 | rc = smc_ib_modify_qp_init(lnk); | |
118 | if (rc) | |
119 | goto out; | |
120 | ||
121 | rc = smc_ib_modify_qp_rtr(lnk); | |
122 | if (rc) | |
123 | goto out; | |
124 | smc_wr_remember_qp_attr(lnk); | |
125 | rc = ib_req_notify_cq(lnk->smcibdev->roce_cq_recv, | |
126 | IB_CQ_SOLICITED_MASK); | |
127 | if (rc) | |
128 | goto out; | |
129 | rc = smc_wr_rx_post_init(lnk); | |
130 | if (rc) | |
131 | goto out; | |
132 | smc_wr_remember_qp_attr(lnk); | |
133 | ||
134 | if (lgr->role == SMC_SERV) { | |
135 | rc = smc_ib_modify_qp_rts(lnk); | |
136 | if (rc) | |
137 | goto out; | |
138 | smc_wr_remember_qp_attr(lnk); | |
139 | } | |
140 | out: | |
141 | return rc; | |
142 | } | |
143 | ||
da05bf29 UB |
144 | static void smc_ib_port_terminate(struct smc_ib_device *smcibdev, u8 ibport) |
145 | { | |
146 | struct smc_link_group *lgr, *l; | |
147 | ||
148 | list_for_each_entry_safe(lgr, l, &smc_lgr_list.list, list) { | |
149 | if (lgr->lnk[SMC_SINGLE_LINK].smcibdev == smcibdev && | |
150 | lgr->lnk[SMC_SINGLE_LINK].ibport == ibport) | |
151 | smc_lgr_terminate(lgr); | |
152 | } | |
153 | } | |
154 | ||
bd4ad577 UB |
155 | /* process context wrapper for might_sleep smc_ib_remember_port_attr */ |
156 | static void smc_ib_port_event_work(struct work_struct *work) | |
157 | { | |
158 | struct smc_ib_device *smcibdev = container_of( | |
159 | work, struct smc_ib_device, port_event_work); | |
160 | u8 port_idx; | |
161 | ||
162 | for_each_set_bit(port_idx, &smcibdev->port_event_mask, SMC_MAX_PORTS) { | |
163 | smc_ib_remember_port_attr(smcibdev, port_idx + 1); | |
164 | clear_bit(port_idx, &smcibdev->port_event_mask); | |
da05bf29 UB |
165 | if (!smc_ib_port_active(smcibdev, port_idx + 1)) |
166 | smc_ib_port_terminate(smcibdev, port_idx + 1); | |
bd4ad577 UB |
167 | } |
168 | } | |
169 | ||
170 | /* can be called in IRQ context */ | |
171 | static void smc_ib_global_event_handler(struct ib_event_handler *handler, | |
172 | struct ib_event *ibevent) | |
173 | { | |
174 | struct smc_ib_device *smcibdev; | |
175 | u8 port_idx; | |
176 | ||
177 | smcibdev = container_of(handler, struct smc_ib_device, event_handler); | |
bd4ad577 UB |
178 | |
179 | switch (ibevent->event) { | |
180 | case IB_EVENT_PORT_ERR: | |
bd4ad577 | 181 | case IB_EVENT_DEVICE_FATAL: |
bd4ad577 UB |
182 | case IB_EVENT_PORT_ACTIVE: |
183 | port_idx = ibevent->element.port_num - 1; | |
184 | set_bit(port_idx, &smcibdev->port_event_mask); | |
185 | schedule_work(&smcibdev->port_event_work); | |
186 | break; | |
187 | default: | |
188 | break; | |
189 | } | |
190 | } | |
191 | ||
f38ba179 UB |
192 | void smc_ib_dealloc_protection_domain(struct smc_link *lnk) |
193 | { | |
da05bf29 UB |
194 | if (lnk->roce_pd) |
195 | ib_dealloc_pd(lnk->roce_pd); | |
f38ba179 UB |
196 | lnk->roce_pd = NULL; |
197 | } | |
198 | ||
199 | int smc_ib_create_protection_domain(struct smc_link *lnk) | |
200 | { | |
201 | int rc; | |
202 | ||
897e1c24 | 203 | lnk->roce_pd = ib_alloc_pd(lnk->smcibdev->ibdev, 0); |
f38ba179 UB |
204 | rc = PTR_ERR_OR_ZERO(lnk->roce_pd); |
205 | if (IS_ERR(lnk->roce_pd)) | |
206 | lnk->roce_pd = NULL; | |
207 | return rc; | |
208 | } | |
209 | ||
210 | static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv) | |
211 | { | |
da05bf29 UB |
212 | struct smc_ib_device *smcibdev = |
213 | (struct smc_ib_device *)ibevent->device; | |
214 | u8 port_idx; | |
215 | ||
f38ba179 UB |
216 | switch (ibevent->event) { |
217 | case IB_EVENT_DEVICE_FATAL: | |
218 | case IB_EVENT_GID_CHANGE: | |
219 | case IB_EVENT_PORT_ERR: | |
220 | case IB_EVENT_QP_ACCESS_ERR: | |
da05bf29 UB |
221 | port_idx = ibevent->element.port_num - 1; |
222 | set_bit(port_idx, &smcibdev->port_event_mask); | |
223 | schedule_work(&smcibdev->port_event_work); | |
f38ba179 UB |
224 | break; |
225 | default: | |
226 | break; | |
227 | } | |
228 | } | |
229 | ||
230 | void smc_ib_destroy_queue_pair(struct smc_link *lnk) | |
231 | { | |
da05bf29 UB |
232 | if (lnk->roce_qp) |
233 | ib_destroy_qp(lnk->roce_qp); | |
f38ba179 UB |
234 | lnk->roce_qp = NULL; |
235 | } | |
236 | ||
237 | /* create a queue pair within the protection domain for a link */ | |
238 | int smc_ib_create_queue_pair(struct smc_link *lnk) | |
239 | { | |
240 | struct ib_qp_init_attr qp_attr = { | |
241 | .event_handler = smc_ib_qp_event_handler, | |
242 | .qp_context = lnk, | |
243 | .send_cq = lnk->smcibdev->roce_cq_send, | |
244 | .recv_cq = lnk->smcibdev->roce_cq_recv, | |
245 | .srq = NULL, | |
246 | .cap = { | |
f38ba179 UB |
247 | /* include unsolicited rdma_writes as well, |
248 | * there are max. 2 RDMA_WRITE per 1 WR_SEND | |
249 | */ | |
652a1e41 | 250 | .max_send_wr = SMC_WR_BUF_CNT * 3, |
f38ba179 UB |
251 | .max_recv_wr = SMC_WR_BUF_CNT * 3, |
252 | .max_send_sge = SMC_IB_MAX_SEND_SGE, | |
253 | .max_recv_sge = 1, | |
f38ba179 UB |
254 | }, |
255 | .sq_sig_type = IB_SIGNAL_REQ_WR, | |
256 | .qp_type = IB_QPT_RC, | |
257 | }; | |
258 | int rc; | |
259 | ||
260 | lnk->roce_qp = ib_create_qp(lnk->roce_pd, &qp_attr); | |
261 | rc = PTR_ERR_OR_ZERO(lnk->roce_qp); | |
262 | if (IS_ERR(lnk->roce_qp)) | |
263 | lnk->roce_qp = NULL; | |
264 | else | |
265 | smc_wr_remember_qp_attr(lnk); | |
266 | return rc; | |
267 | } | |
268 | ||
897e1c24 UB |
269 | void smc_ib_put_memory_region(struct ib_mr *mr) |
270 | { | |
271 | ib_dereg_mr(mr); | |
272 | } | |
273 | ||
274 | static int smc_ib_map_mr_sg(struct smc_buf_desc *buf_slot) | |
275 | { | |
276 | unsigned int offset = 0; | |
277 | int sg_num; | |
278 | ||
279 | /* map the largest prefix of a dma mapped SG list */ | |
280 | sg_num = ib_map_mr_sg(buf_slot->mr_rx[SMC_SINGLE_LINK], | |
281 | buf_slot->sgt[SMC_SINGLE_LINK].sgl, | |
282 | buf_slot->sgt[SMC_SINGLE_LINK].orig_nents, | |
283 | &offset, PAGE_SIZE); | |
284 | ||
285 | return sg_num; | |
286 | } | |
287 | ||
288 | /* Allocate a memory region and map the dma mapped SG list of buf_slot */ | |
289 | int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, | |
290 | struct smc_buf_desc *buf_slot) | |
291 | { | |
292 | if (buf_slot->mr_rx[SMC_SINGLE_LINK]) | |
293 | return 0; /* already done */ | |
294 | ||
295 | buf_slot->mr_rx[SMC_SINGLE_LINK] = | |
296 | ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, 1 << buf_slot->order); | |
297 | if (IS_ERR(buf_slot->mr_rx[SMC_SINGLE_LINK])) { | |
298 | int rc; | |
299 | ||
300 | rc = PTR_ERR(buf_slot->mr_rx[SMC_SINGLE_LINK]); | |
301 | buf_slot->mr_rx[SMC_SINGLE_LINK] = NULL; | |
302 | return rc; | |
303 | } | |
304 | ||
305 | if (smc_ib_map_mr_sg(buf_slot) != 1) | |
306 | return -EINVAL; | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
10428dd8 UB |
311 | /* synchronize buffer usage for cpu access */ |
312 | void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev, | |
313 | struct smc_buf_desc *buf_slot, | |
314 | enum dma_data_direction data_direction) | |
315 | { | |
316 | struct scatterlist *sg; | |
317 | unsigned int i; | |
318 | ||
319 | /* for now there is just one DMA address */ | |
320 | for_each_sg(buf_slot->sgt[SMC_SINGLE_LINK].sgl, sg, | |
321 | buf_slot->sgt[SMC_SINGLE_LINK].nents, i) { | |
322 | if (!sg_dma_len(sg)) | |
323 | break; | |
324 | ib_dma_sync_single_for_cpu(smcibdev->ibdev, | |
325 | sg_dma_address(sg), | |
326 | sg_dma_len(sg), | |
327 | data_direction); | |
328 | } | |
329 | } | |
330 | ||
331 | /* synchronize buffer usage for device access */ | |
332 | void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev, | |
333 | struct smc_buf_desc *buf_slot, | |
334 | enum dma_data_direction data_direction) | |
335 | { | |
336 | struct scatterlist *sg; | |
337 | unsigned int i; | |
338 | ||
339 | /* for now there is just one DMA address */ | |
340 | for_each_sg(buf_slot->sgt[SMC_SINGLE_LINK].sgl, sg, | |
341 | buf_slot->sgt[SMC_SINGLE_LINK].nents, i) { | |
342 | if (!sg_dma_len(sg)) | |
343 | break; | |
344 | ib_dma_sync_single_for_device(smcibdev->ibdev, | |
345 | sg_dma_address(sg), | |
346 | sg_dma_len(sg), | |
347 | data_direction); | |
348 | } | |
349 | } | |
350 | ||
a3fe3d01 UB |
351 | /* Map a new TX or RX buffer SG-table to DMA */ |
352 | int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev, | |
353 | struct smc_buf_desc *buf_slot, | |
354 | enum dma_data_direction data_direction) | |
355 | { | |
356 | int mapped_nents; | |
357 | ||
358 | mapped_nents = ib_dma_map_sg(smcibdev->ibdev, | |
359 | buf_slot->sgt[SMC_SINGLE_LINK].sgl, | |
360 | buf_slot->sgt[SMC_SINGLE_LINK].orig_nents, | |
361 | data_direction); | |
362 | if (!mapped_nents) | |
363 | return -ENOMEM; | |
364 | ||
365 | return mapped_nents; | |
366 | } | |
367 | ||
368 | void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev, | |
369 | struct smc_buf_desc *buf_slot, | |
370 | enum dma_data_direction data_direction) | |
371 | { | |
372 | if (!buf_slot->sgt[SMC_SINGLE_LINK].sgl->dma_address) | |
373 | return; /* already unmapped */ | |
374 | ||
375 | ib_dma_unmap_sg(smcibdev->ibdev, | |
376 | buf_slot->sgt[SMC_SINGLE_LINK].sgl, | |
377 | buf_slot->sgt[SMC_SINGLE_LINK].orig_nents, | |
378 | data_direction); | |
379 | buf_slot->sgt[SMC_SINGLE_LINK].sgl->dma_address = 0; | |
380 | } | |
381 | ||
a4cf0443 UB |
382 | static int smc_ib_fill_gid_and_mac(struct smc_ib_device *smcibdev, u8 ibport) |
383 | { | |
d921c420 | 384 | struct ib_gid_attr gattr; |
a4cf0443 UB |
385 | int rc; |
386 | ||
387 | rc = ib_query_gid(smcibdev->ibdev, ibport, 0, | |
d921c420 UB |
388 | &smcibdev->gid[ibport - 1], &gattr); |
389 | if (rc || !gattr.ndev) | |
390 | return -ENODEV; | |
391 | ||
392 | memcpy(smcibdev->mac[ibport - 1], gattr.ndev->dev_addr, ETH_ALEN); | |
393 | dev_put(gattr.ndev); | |
394 | return 0; | |
a4cf0443 UB |
395 | } |
396 | ||
397 | /* Create an identifier unique for this instance of SMC-R. | |
398 | * The MAC-address of the first active registered IB device | |
399 | * plus a random 2-byte number is used to create this identifier. | |
400 | * This name is delivered to the peer during connection initialization. | |
401 | */ | |
402 | static inline void smc_ib_define_local_systemid(struct smc_ib_device *smcibdev, | |
403 | u8 ibport) | |
404 | { | |
405 | memcpy(&local_systemid[2], &smcibdev->mac[ibport - 1], | |
406 | sizeof(smcibdev->mac[ibport - 1])); | |
407 | get_random_bytes(&local_systemid[0], 2); | |
408 | } | |
409 | ||
410 | bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport) | |
411 | { | |
412 | return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE; | |
413 | } | |
414 | ||
415 | int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport) | |
416 | { | |
417 | int rc; | |
418 | ||
419 | memset(&smcibdev->pattr[ibport - 1], 0, | |
420 | sizeof(smcibdev->pattr[ibport - 1])); | |
421 | rc = ib_query_port(smcibdev->ibdev, ibport, | |
422 | &smcibdev->pattr[ibport - 1]); | |
423 | if (rc) | |
424 | goto out; | |
d921c420 | 425 | /* the SMC protocol requires specification of the RoCE MAC address */ |
a4cf0443 UB |
426 | rc = smc_ib_fill_gid_and_mac(smcibdev, ibport); |
427 | if (rc) | |
428 | goto out; | |
429 | if (!strncmp(local_systemid, SMC_LOCAL_SYSTEMID_RESET, | |
430 | sizeof(local_systemid)) && | |
431 | smc_ib_port_active(smcibdev, ibport)) | |
432 | /* create unique system identifier */ | |
433 | smc_ib_define_local_systemid(smcibdev, ibport); | |
434 | out: | |
435 | return rc; | |
436 | } | |
437 | ||
bd4ad577 UB |
438 | long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev) |
439 | { | |
440 | struct ib_cq_init_attr cqattr = { | |
441 | .cqe = SMC_WR_MAX_CQE, .comp_vector = 0 }; | |
442 | long rc; | |
443 | ||
444 | smcibdev->roce_cq_send = ib_create_cq(smcibdev->ibdev, | |
445 | smc_wr_tx_cq_handler, NULL, | |
446 | smcibdev, &cqattr); | |
447 | rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_send); | |
448 | if (IS_ERR(smcibdev->roce_cq_send)) { | |
449 | smcibdev->roce_cq_send = NULL; | |
450 | return rc; | |
451 | } | |
452 | smcibdev->roce_cq_recv = ib_create_cq(smcibdev->ibdev, | |
453 | smc_wr_rx_cq_handler, NULL, | |
454 | smcibdev, &cqattr); | |
455 | rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_recv); | |
456 | if (IS_ERR(smcibdev->roce_cq_recv)) { | |
457 | smcibdev->roce_cq_recv = NULL; | |
458 | goto err; | |
459 | } | |
460 | INIT_IB_EVENT_HANDLER(&smcibdev->event_handler, smcibdev->ibdev, | |
461 | smc_ib_global_event_handler); | |
462 | ib_register_event_handler(&smcibdev->event_handler); | |
463 | smc_wr_add_dev(smcibdev); | |
464 | smcibdev->initialized = 1; | |
465 | return rc; | |
466 | ||
467 | err: | |
468 | ib_destroy_cq(smcibdev->roce_cq_send); | |
469 | return rc; | |
470 | } | |
471 | ||
472 | static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev) | |
473 | { | |
474 | if (!smcibdev->initialized) | |
475 | return; | |
da05bf29 | 476 | smcibdev->initialized = 0; |
bd4ad577 UB |
477 | smc_wr_remove_dev(smcibdev); |
478 | ib_unregister_event_handler(&smcibdev->event_handler); | |
479 | ib_destroy_cq(smcibdev->roce_cq_recv); | |
480 | ib_destroy_cq(smcibdev->roce_cq_send); | |
481 | } | |
482 | ||
a4cf0443 UB |
483 | static struct ib_client smc_ib_client; |
484 | ||
485 | /* callback function for ib_register_client() */ | |
486 | static void smc_ib_add_dev(struct ib_device *ibdev) | |
487 | { | |
488 | struct smc_ib_device *smcibdev; | |
489 | ||
490 | if (ibdev->node_type != RDMA_NODE_IB_CA) | |
491 | return; | |
492 | ||
493 | smcibdev = kzalloc(sizeof(*smcibdev), GFP_KERNEL); | |
494 | if (!smcibdev) | |
495 | return; | |
496 | ||
497 | smcibdev->ibdev = ibdev; | |
bd4ad577 | 498 | INIT_WORK(&smcibdev->port_event_work, smc_ib_port_event_work); |
a4cf0443 UB |
499 | |
500 | spin_lock(&smc_ib_devices.lock); | |
501 | list_add_tail(&smcibdev->list, &smc_ib_devices.list); | |
502 | spin_unlock(&smc_ib_devices.lock); | |
503 | ib_set_client_data(ibdev, &smc_ib_client, smcibdev); | |
504 | } | |
505 | ||
506 | /* callback function for ib_register_client() */ | |
507 | static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data) | |
508 | { | |
509 | struct smc_ib_device *smcibdev; | |
510 | ||
511 | smcibdev = ib_get_client_data(ibdev, &smc_ib_client); | |
512 | ib_set_client_data(ibdev, &smc_ib_client, NULL); | |
513 | spin_lock(&smc_ib_devices.lock); | |
514 | list_del_init(&smcibdev->list); /* remove from smc_ib_devices */ | |
515 | spin_unlock(&smc_ib_devices.lock); | |
6812baab | 516 | smc_pnet_remove_by_ibdev(smcibdev); |
bd4ad577 | 517 | smc_ib_cleanup_per_ibdev(smcibdev); |
a4cf0443 UB |
518 | kfree(smcibdev); |
519 | } | |
520 | ||
521 | static struct ib_client smc_ib_client = { | |
522 | .name = "smc_ib", | |
523 | .add = smc_ib_add_dev, | |
524 | .remove = smc_ib_remove_dev, | |
525 | }; | |
526 | ||
527 | int __init smc_ib_register_client(void) | |
528 | { | |
529 | return ib_register_client(&smc_ib_client); | |
530 | } | |
531 | ||
532 | void smc_ib_unregister_client(void) | |
533 | { | |
534 | ib_unregister_client(&smc_ib_client); | |
535 | } |