Commit | Line | Data |
---|---|---|
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 | ||
c9f4c6cf UB |
26 | #define SMC_MAX_CQE 32766 /* max. # of completion queue elements */ |
27 | ||
bd4ad577 UB |
28 | #define SMC_QP_MIN_RNR_TIMER 5 |
29 | #define SMC_QP_TIMEOUT 15 /* 4096 * 2 ** timeout usec */ | |
30 | #define SMC_QP_RETRY_CNT 7 /* 7: infinite */ | |
31 | #define SMC_QP_RNR_RETRY 7 /* 7: infinite */ | |
32 | ||
a4cf0443 UB |
33 | struct smc_ib_devices smc_ib_devices = { /* smc-registered ib devices */ |
34 | .lock = __SPIN_LOCK_UNLOCKED(smc_ib_devices.lock), | |
35 | .list = LIST_HEAD_INIT(smc_ib_devices.list), | |
36 | }; | |
37 | ||
38 | #define SMC_LOCAL_SYSTEMID_RESET "%%%%%%%" | |
39 | ||
40 | u8 local_systemid[SMC_SYSTEMID_LEN] = SMC_LOCAL_SYSTEMID_RESET; /* unique system | |
41 | * identifier | |
42 | */ | |
43 | ||
bd4ad577 UB |
44 | static int smc_ib_modify_qp_init(struct smc_link *lnk) |
45 | { | |
46 | struct ib_qp_attr qp_attr; | |
47 | ||
48 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
49 | qp_attr.qp_state = IB_QPS_INIT; | |
50 | qp_attr.pkey_index = 0; | |
51 | qp_attr.port_num = lnk->ibport; | |
52 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE | |
53 | | IB_ACCESS_REMOTE_WRITE; | |
54 | return ib_modify_qp(lnk->roce_qp, &qp_attr, | |
55 | IB_QP_STATE | IB_QP_PKEY_INDEX | | |
56 | IB_QP_ACCESS_FLAGS | IB_QP_PORT); | |
57 | } | |
58 | ||
59 | static int smc_ib_modify_qp_rtr(struct smc_link *lnk) | |
60 | { | |
61 | enum ib_qp_attr_mask qp_attr_mask = | |
62 | IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | IB_QP_DEST_QPN | | |
63 | IB_QP_RQ_PSN | IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; | |
64 | struct ib_qp_attr qp_attr; | |
65 | ||
66 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
67 | qp_attr.qp_state = IB_QPS_RTR; | |
68 | qp_attr.path_mtu = min(lnk->path_mtu, lnk->peer_mtu); | |
44c58487 | 69 | qp_attr.ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE; |
d8966fcd DC |
70 | rdma_ah_set_port_num(&qp_attr.ah_attr, lnk->ibport); |
71 | rdma_ah_set_grh(&qp_attr.ah_attr, NULL, 0, 0, 1, 0); | |
72 | rdma_ah_set_dgid_raw(&qp_attr.ah_attr, lnk->peer_gid); | |
44c58487 | 73 | memcpy(&qp_attr.ah_attr.roce.dmac, lnk->peer_mac, |
bd4ad577 UB |
74 | sizeof(lnk->peer_mac)); |
75 | qp_attr.dest_qp_num = lnk->peer_qpn; | |
76 | qp_attr.rq_psn = lnk->peer_psn; /* starting receive packet seq # */ | |
77 | qp_attr.max_dest_rd_atomic = 1; /* max # of resources for incoming | |
78 | * requests | |
79 | */ | |
80 | qp_attr.min_rnr_timer = SMC_QP_MIN_RNR_TIMER; | |
81 | ||
82 | return ib_modify_qp(lnk->roce_qp, &qp_attr, qp_attr_mask); | |
83 | } | |
84 | ||
85 | int smc_ib_modify_qp_rts(struct smc_link *lnk) | |
86 | { | |
87 | struct ib_qp_attr qp_attr; | |
88 | ||
89 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
90 | qp_attr.qp_state = IB_QPS_RTS; | |
91 | qp_attr.timeout = SMC_QP_TIMEOUT; /* local ack timeout */ | |
92 | qp_attr.retry_cnt = SMC_QP_RETRY_CNT; /* retry count */ | |
93 | qp_attr.rnr_retry = SMC_QP_RNR_RETRY; /* RNR retries, 7=infinite */ | |
94 | qp_attr.sq_psn = lnk->psn_initial; /* starting send packet seq # */ | |
95 | qp_attr.max_rd_atomic = 1; /* # of outstanding RDMA reads and | |
96 | * atomic ops allowed | |
97 | */ | |
98 | return ib_modify_qp(lnk->roce_qp, &qp_attr, | |
99 | IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT | | |
100 | IB_QP_SQ_PSN | IB_QP_RNR_RETRY | | |
101 | IB_QP_MAX_QP_RD_ATOMIC); | |
102 | } | |
103 | ||
104 | int smc_ib_modify_qp_reset(struct smc_link *lnk) | |
105 | { | |
106 | struct ib_qp_attr qp_attr; | |
107 | ||
108 | memset(&qp_attr, 0, sizeof(qp_attr)); | |
109 | qp_attr.qp_state = IB_QPS_RESET; | |
110 | return ib_modify_qp(lnk->roce_qp, &qp_attr, IB_QP_STATE); | |
111 | } | |
112 | ||
113 | int smc_ib_ready_link(struct smc_link *lnk) | |
114 | { | |
115 | struct smc_link_group *lgr = | |
116 | container_of(lnk, struct smc_link_group, lnk[0]); | |
117 | int rc = 0; | |
118 | ||
119 | rc = smc_ib_modify_qp_init(lnk); | |
120 | if (rc) | |
121 | goto out; | |
122 | ||
123 | rc = smc_ib_modify_qp_rtr(lnk); | |
124 | if (rc) | |
125 | goto out; | |
126 | smc_wr_remember_qp_attr(lnk); | |
127 | rc = ib_req_notify_cq(lnk->smcibdev->roce_cq_recv, | |
128 | IB_CQ_SOLICITED_MASK); | |
129 | if (rc) | |
130 | goto out; | |
131 | rc = smc_wr_rx_post_init(lnk); | |
132 | if (rc) | |
133 | goto out; | |
134 | smc_wr_remember_qp_attr(lnk); | |
135 | ||
136 | if (lgr->role == SMC_SERV) { | |
137 | rc = smc_ib_modify_qp_rts(lnk); | |
138 | if (rc) | |
139 | goto out; | |
140 | smc_wr_remember_qp_attr(lnk); | |
141 | } | |
142 | out: | |
143 | return rc; | |
144 | } | |
145 | ||
146 | /* process context wrapper for might_sleep smc_ib_remember_port_attr */ | |
147 | static void smc_ib_port_event_work(struct work_struct *work) | |
148 | { | |
149 | struct smc_ib_device *smcibdev = container_of( | |
150 | work, struct smc_ib_device, port_event_work); | |
151 | u8 port_idx; | |
152 | ||
153 | for_each_set_bit(port_idx, &smcibdev->port_event_mask, SMC_MAX_PORTS) { | |
154 | smc_ib_remember_port_attr(smcibdev, port_idx + 1); | |
155 | clear_bit(port_idx, &smcibdev->port_event_mask); | |
da05bf29 | 156 | if (!smc_ib_port_active(smcibdev, port_idx + 1)) |
9fda3510 | 157 | smc_port_terminate(smcibdev, port_idx + 1); |
bd4ad577 UB |
158 | } |
159 | } | |
160 | ||
161 | /* can be called in IRQ context */ | |
162 | static void smc_ib_global_event_handler(struct ib_event_handler *handler, | |
163 | struct ib_event *ibevent) | |
164 | { | |
165 | struct smc_ib_device *smcibdev; | |
166 | u8 port_idx; | |
167 | ||
168 | smcibdev = container_of(handler, struct smc_ib_device, event_handler); | |
bd4ad577 UB |
169 | |
170 | switch (ibevent->event) { | |
171 | case IB_EVENT_PORT_ERR: | |
bd4ad577 | 172 | case IB_EVENT_DEVICE_FATAL: |
bd4ad577 UB |
173 | case IB_EVENT_PORT_ACTIVE: |
174 | port_idx = ibevent->element.port_num - 1; | |
175 | set_bit(port_idx, &smcibdev->port_event_mask); | |
176 | schedule_work(&smcibdev->port_event_work); | |
177 | break; | |
178 | default: | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
f38ba179 UB |
183 | void smc_ib_dealloc_protection_domain(struct smc_link *lnk) |
184 | { | |
da05bf29 UB |
185 | if (lnk->roce_pd) |
186 | ib_dealloc_pd(lnk->roce_pd); | |
f38ba179 UB |
187 | lnk->roce_pd = NULL; |
188 | } | |
189 | ||
190 | int smc_ib_create_protection_domain(struct smc_link *lnk) | |
191 | { | |
192 | int rc; | |
193 | ||
897e1c24 | 194 | lnk->roce_pd = ib_alloc_pd(lnk->smcibdev->ibdev, 0); |
f38ba179 UB |
195 | rc = PTR_ERR_OR_ZERO(lnk->roce_pd); |
196 | if (IS_ERR(lnk->roce_pd)) | |
197 | lnk->roce_pd = NULL; | |
198 | return rc; | |
199 | } | |
200 | ||
201 | static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv) | |
202 | { | |
da05bf29 UB |
203 | struct smc_ib_device *smcibdev = |
204 | (struct smc_ib_device *)ibevent->device; | |
205 | u8 port_idx; | |
206 | ||
f38ba179 UB |
207 | switch (ibevent->event) { |
208 | case IB_EVENT_DEVICE_FATAL: | |
209 | case IB_EVENT_GID_CHANGE: | |
210 | case IB_EVENT_PORT_ERR: | |
211 | case IB_EVENT_QP_ACCESS_ERR: | |
da05bf29 UB |
212 | port_idx = ibevent->element.port_num - 1; |
213 | set_bit(port_idx, &smcibdev->port_event_mask); | |
214 | schedule_work(&smcibdev->port_event_work); | |
f38ba179 UB |
215 | break; |
216 | default: | |
217 | break; | |
218 | } | |
219 | } | |
220 | ||
221 | void smc_ib_destroy_queue_pair(struct smc_link *lnk) | |
222 | { | |
da05bf29 UB |
223 | if (lnk->roce_qp) |
224 | ib_destroy_qp(lnk->roce_qp); | |
f38ba179 UB |
225 | lnk->roce_qp = NULL; |
226 | } | |
227 | ||
228 | /* create a queue pair within the protection domain for a link */ | |
229 | int smc_ib_create_queue_pair(struct smc_link *lnk) | |
230 | { | |
231 | struct ib_qp_init_attr qp_attr = { | |
232 | .event_handler = smc_ib_qp_event_handler, | |
233 | .qp_context = lnk, | |
234 | .send_cq = lnk->smcibdev->roce_cq_send, | |
235 | .recv_cq = lnk->smcibdev->roce_cq_recv, | |
236 | .srq = NULL, | |
237 | .cap = { | |
f38ba179 UB |
238 | /* include unsolicited rdma_writes as well, |
239 | * there are max. 2 RDMA_WRITE per 1 WR_SEND | |
240 | */ | |
652a1e41 | 241 | .max_send_wr = SMC_WR_BUF_CNT * 3, |
f38ba179 UB |
242 | .max_recv_wr = SMC_WR_BUF_CNT * 3, |
243 | .max_send_sge = SMC_IB_MAX_SEND_SGE, | |
244 | .max_recv_sge = 1, | |
f38ba179 UB |
245 | }, |
246 | .sq_sig_type = IB_SIGNAL_REQ_WR, | |
247 | .qp_type = IB_QPT_RC, | |
248 | }; | |
249 | int rc; | |
250 | ||
251 | lnk->roce_qp = ib_create_qp(lnk->roce_pd, &qp_attr); | |
252 | rc = PTR_ERR_OR_ZERO(lnk->roce_qp); | |
253 | if (IS_ERR(lnk->roce_qp)) | |
254 | lnk->roce_qp = NULL; | |
255 | else | |
256 | smc_wr_remember_qp_attr(lnk); | |
257 | return rc; | |
258 | } | |
259 | ||
897e1c24 UB |
260 | void smc_ib_put_memory_region(struct ib_mr *mr) |
261 | { | |
262 | ib_dereg_mr(mr); | |
263 | } | |
264 | ||
265 | static int smc_ib_map_mr_sg(struct smc_buf_desc *buf_slot) | |
266 | { | |
267 | unsigned int offset = 0; | |
268 | int sg_num; | |
269 | ||
270 | /* map the largest prefix of a dma mapped SG list */ | |
271 | sg_num = ib_map_mr_sg(buf_slot->mr_rx[SMC_SINGLE_LINK], | |
272 | buf_slot->sgt[SMC_SINGLE_LINK].sgl, | |
273 | buf_slot->sgt[SMC_SINGLE_LINK].orig_nents, | |
274 | &offset, PAGE_SIZE); | |
275 | ||
276 | return sg_num; | |
277 | } | |
278 | ||
279 | /* Allocate a memory region and map the dma mapped SG list of buf_slot */ | |
280 | int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, | |
281 | struct smc_buf_desc *buf_slot) | |
282 | { | |
283 | if (buf_slot->mr_rx[SMC_SINGLE_LINK]) | |
284 | return 0; /* already done */ | |
285 | ||
286 | buf_slot->mr_rx[SMC_SINGLE_LINK] = | |
287 | ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, 1 << buf_slot->order); | |
288 | if (IS_ERR(buf_slot->mr_rx[SMC_SINGLE_LINK])) { | |
289 | int rc; | |
290 | ||
291 | rc = PTR_ERR(buf_slot->mr_rx[SMC_SINGLE_LINK]); | |
292 | buf_slot->mr_rx[SMC_SINGLE_LINK] = NULL; | |
293 | return rc; | |
294 | } | |
295 | ||
296 | if (smc_ib_map_mr_sg(buf_slot) != 1) | |
297 | return -EINVAL; | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
10428dd8 UB |
302 | /* synchronize buffer usage for cpu access */ |
303 | void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev, | |
304 | struct smc_buf_desc *buf_slot, | |
305 | enum dma_data_direction data_direction) | |
306 | { | |
307 | struct scatterlist *sg; | |
308 | unsigned int i; | |
309 | ||
310 | /* for now there is just one DMA address */ | |
311 | for_each_sg(buf_slot->sgt[SMC_SINGLE_LINK].sgl, sg, | |
312 | buf_slot->sgt[SMC_SINGLE_LINK].nents, i) { | |
313 | if (!sg_dma_len(sg)) | |
314 | break; | |
315 | ib_dma_sync_single_for_cpu(smcibdev->ibdev, | |
316 | sg_dma_address(sg), | |
317 | sg_dma_len(sg), | |
318 | data_direction); | |
319 | } | |
320 | } | |
321 | ||
322 | /* synchronize buffer usage for device access */ | |
323 | void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev, | |
324 | struct smc_buf_desc *buf_slot, | |
325 | enum dma_data_direction data_direction) | |
326 | { | |
327 | struct scatterlist *sg; | |
328 | unsigned int i; | |
329 | ||
330 | /* for now there is just one DMA address */ | |
331 | for_each_sg(buf_slot->sgt[SMC_SINGLE_LINK].sgl, sg, | |
332 | buf_slot->sgt[SMC_SINGLE_LINK].nents, i) { | |
333 | if (!sg_dma_len(sg)) | |
334 | break; | |
335 | ib_dma_sync_single_for_device(smcibdev->ibdev, | |
336 | sg_dma_address(sg), | |
337 | sg_dma_len(sg), | |
338 | data_direction); | |
339 | } | |
340 | } | |
341 | ||
a3fe3d01 UB |
342 | /* Map a new TX or RX buffer SG-table to DMA */ |
343 | int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev, | |
344 | struct smc_buf_desc *buf_slot, | |
345 | enum dma_data_direction data_direction) | |
346 | { | |
347 | int mapped_nents; | |
348 | ||
349 | mapped_nents = ib_dma_map_sg(smcibdev->ibdev, | |
350 | buf_slot->sgt[SMC_SINGLE_LINK].sgl, | |
351 | buf_slot->sgt[SMC_SINGLE_LINK].orig_nents, | |
352 | data_direction); | |
353 | if (!mapped_nents) | |
354 | return -ENOMEM; | |
355 | ||
356 | return mapped_nents; | |
357 | } | |
358 | ||
359 | void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev, | |
360 | struct smc_buf_desc *buf_slot, | |
361 | enum dma_data_direction data_direction) | |
362 | { | |
363 | if (!buf_slot->sgt[SMC_SINGLE_LINK].sgl->dma_address) | |
364 | return; /* already unmapped */ | |
365 | ||
366 | ib_dma_unmap_sg(smcibdev->ibdev, | |
367 | buf_slot->sgt[SMC_SINGLE_LINK].sgl, | |
368 | buf_slot->sgt[SMC_SINGLE_LINK].orig_nents, | |
369 | data_direction); | |
370 | buf_slot->sgt[SMC_SINGLE_LINK].sgl->dma_address = 0; | |
371 | } | |
372 | ||
a4cf0443 UB |
373 | static int smc_ib_fill_gid_and_mac(struct smc_ib_device *smcibdev, u8 ibport) |
374 | { | |
d921c420 | 375 | struct ib_gid_attr gattr; |
a4cf0443 UB |
376 | int rc; |
377 | ||
378 | rc = ib_query_gid(smcibdev->ibdev, ibport, 0, | |
d921c420 UB |
379 | &smcibdev->gid[ibport - 1], &gattr); |
380 | if (rc || !gattr.ndev) | |
381 | return -ENODEV; | |
382 | ||
383 | memcpy(smcibdev->mac[ibport - 1], gattr.ndev->dev_addr, ETH_ALEN); | |
384 | dev_put(gattr.ndev); | |
385 | return 0; | |
a4cf0443 UB |
386 | } |
387 | ||
388 | /* Create an identifier unique for this instance of SMC-R. | |
389 | * The MAC-address of the first active registered IB device | |
390 | * plus a random 2-byte number is used to create this identifier. | |
391 | * This name is delivered to the peer during connection initialization. | |
392 | */ | |
393 | static inline void smc_ib_define_local_systemid(struct smc_ib_device *smcibdev, | |
394 | u8 ibport) | |
395 | { | |
396 | memcpy(&local_systemid[2], &smcibdev->mac[ibport - 1], | |
397 | sizeof(smcibdev->mac[ibport - 1])); | |
398 | get_random_bytes(&local_systemid[0], 2); | |
399 | } | |
400 | ||
401 | bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport) | |
402 | { | |
403 | return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE; | |
404 | } | |
405 | ||
406 | int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport) | |
407 | { | |
408 | int rc; | |
409 | ||
410 | memset(&smcibdev->pattr[ibport - 1], 0, | |
411 | sizeof(smcibdev->pattr[ibport - 1])); | |
412 | rc = ib_query_port(smcibdev->ibdev, ibport, | |
413 | &smcibdev->pattr[ibport - 1]); | |
414 | if (rc) | |
415 | goto out; | |
d921c420 | 416 | /* the SMC protocol requires specification of the RoCE MAC address */ |
a4cf0443 UB |
417 | rc = smc_ib_fill_gid_and_mac(smcibdev, ibport); |
418 | if (rc) | |
419 | goto out; | |
420 | if (!strncmp(local_systemid, SMC_LOCAL_SYSTEMID_RESET, | |
421 | sizeof(local_systemid)) && | |
422 | smc_ib_port_active(smcibdev, ibport)) | |
423 | /* create unique system identifier */ | |
424 | smc_ib_define_local_systemid(smcibdev, ibport); | |
425 | out: | |
426 | return rc; | |
427 | } | |
428 | ||
bd4ad577 UB |
429 | long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev) |
430 | { | |
431 | struct ib_cq_init_attr cqattr = { | |
c9f4c6cf UB |
432 | .cqe = SMC_MAX_CQE, .comp_vector = 0 }; |
433 | int cqe_size_order, smc_order; | |
bd4ad577 UB |
434 | long rc; |
435 | ||
c9f4c6cf UB |
436 | /* the calculated number of cq entries fits to mlx5 cq allocation */ |
437 | cqe_size_order = cache_line_size() == 128 ? 7 : 6; | |
438 | smc_order = MAX_ORDER - cqe_size_order - 1; | |
439 | if (SMC_MAX_CQE + 2 > (0x00000001 << smc_order) * PAGE_SIZE) | |
440 | cqattr.cqe = (0x00000001 << smc_order) * PAGE_SIZE - 2; | |
bd4ad577 UB |
441 | smcibdev->roce_cq_send = ib_create_cq(smcibdev->ibdev, |
442 | smc_wr_tx_cq_handler, NULL, | |
443 | smcibdev, &cqattr); | |
444 | rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_send); | |
445 | if (IS_ERR(smcibdev->roce_cq_send)) { | |
446 | smcibdev->roce_cq_send = NULL; | |
447 | return rc; | |
448 | } | |
449 | smcibdev->roce_cq_recv = ib_create_cq(smcibdev->ibdev, | |
450 | smc_wr_rx_cq_handler, NULL, | |
451 | smcibdev, &cqattr); | |
452 | rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_recv); | |
453 | if (IS_ERR(smcibdev->roce_cq_recv)) { | |
454 | smcibdev->roce_cq_recv = NULL; | |
455 | goto err; | |
456 | } | |
457 | INIT_IB_EVENT_HANDLER(&smcibdev->event_handler, smcibdev->ibdev, | |
458 | smc_ib_global_event_handler); | |
459 | ib_register_event_handler(&smcibdev->event_handler); | |
460 | smc_wr_add_dev(smcibdev); | |
461 | smcibdev->initialized = 1; | |
462 | return rc; | |
463 | ||
464 | err: | |
465 | ib_destroy_cq(smcibdev->roce_cq_send); | |
466 | return rc; | |
467 | } | |
468 | ||
469 | static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev) | |
470 | { | |
471 | if (!smcibdev->initialized) | |
472 | return; | |
da05bf29 | 473 | smcibdev->initialized = 0; |
bd4ad577 UB |
474 | smc_wr_remove_dev(smcibdev); |
475 | ib_unregister_event_handler(&smcibdev->event_handler); | |
476 | ib_destroy_cq(smcibdev->roce_cq_recv); | |
477 | ib_destroy_cq(smcibdev->roce_cq_send); | |
478 | } | |
479 | ||
a4cf0443 UB |
480 | static struct ib_client smc_ib_client; |
481 | ||
482 | /* callback function for ib_register_client() */ | |
483 | static void smc_ib_add_dev(struct ib_device *ibdev) | |
484 | { | |
485 | struct smc_ib_device *smcibdev; | |
486 | ||
487 | if (ibdev->node_type != RDMA_NODE_IB_CA) | |
488 | return; | |
489 | ||
490 | smcibdev = kzalloc(sizeof(*smcibdev), GFP_KERNEL); | |
491 | if (!smcibdev) | |
492 | return; | |
493 | ||
494 | smcibdev->ibdev = ibdev; | |
bd4ad577 | 495 | INIT_WORK(&smcibdev->port_event_work, smc_ib_port_event_work); |
a4cf0443 UB |
496 | |
497 | spin_lock(&smc_ib_devices.lock); | |
498 | list_add_tail(&smcibdev->list, &smc_ib_devices.list); | |
499 | spin_unlock(&smc_ib_devices.lock); | |
500 | ib_set_client_data(ibdev, &smc_ib_client, smcibdev); | |
501 | } | |
502 | ||
503 | /* callback function for ib_register_client() */ | |
504 | static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data) | |
505 | { | |
506 | struct smc_ib_device *smcibdev; | |
507 | ||
508 | smcibdev = ib_get_client_data(ibdev, &smc_ib_client); | |
509 | ib_set_client_data(ibdev, &smc_ib_client, NULL); | |
510 | spin_lock(&smc_ib_devices.lock); | |
511 | list_del_init(&smcibdev->list); /* remove from smc_ib_devices */ | |
512 | spin_unlock(&smc_ib_devices.lock); | |
6812baab | 513 | smc_pnet_remove_by_ibdev(smcibdev); |
bd4ad577 | 514 | smc_ib_cleanup_per_ibdev(smcibdev); |
a4cf0443 UB |
515 | kfree(smcibdev); |
516 | } | |
517 | ||
518 | static struct ib_client smc_ib_client = { | |
519 | .name = "smc_ib", | |
520 | .add = smc_ib_add_dev, | |
521 | .remove = smc_ib_remove_dev, | |
522 | }; | |
523 | ||
524 | int __init smc_ib_register_client(void) | |
525 | { | |
526 | return ib_register_client(&smc_ib_client); | |
527 | } | |
528 | ||
529 | void smc_ib_unregister_client(void) | |
530 | { | |
531 | ib_unregister_client(&smc_ib_client); | |
532 | } |