1 | // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
2 | |
3 | /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */ |
4 | /* Copyright (c) 2008-2019, IBM Corporation */ |
5 | |
6 | #include <linux/errno.h> |
7 | #include <linux/types.h> |
8 | #include <linux/net.h> |
9 | #include <linux/scatterlist.h> |
10 | #include <linux/llist.h> |
11 | #include <asm/barrier.h> |
12 | #include <net/tcp.h> |
13 | #include <trace/events/sock.h> |
14 | |
15 | #include "siw.h" |
16 | #include "siw_verbs.h" |
17 | #include "siw_mem.h" |
18 | |
19 | static char siw_qp_state_to_string[SIW_QP_STATE_COUNT][sizeof "TERMINATE" ] = { |
20 | [SIW_QP_STATE_IDLE] = "IDLE" , |
21 | [SIW_QP_STATE_RTR] = "RTR" , |
22 | [SIW_QP_STATE_RTS] = "RTS" , |
23 | [SIW_QP_STATE_CLOSING] = "CLOSING" , |
24 | [SIW_QP_STATE_TERMINATE] = "TERMINATE" , |
25 | [SIW_QP_STATE_ERROR] = "ERROR" |
26 | }; |
27 | |
28 | /* |
29 | * iWARP (RDMAP, DDP and MPA) parameters as well as Softiwarp settings on a |
30 | * per-RDMAP message basis. Please keep order of initializer. All MPA len |
31 | * is initialized to minimum packet size. |
32 | */ |
33 | struct iwarp_msg_info iwarp_pktinfo[RDMAP_TERMINATE + 1] = { |
34 | { /* RDMAP_RDMA_WRITE */ |
35 | .hdr_len = sizeof(struct iwarp_rdma_write), |
36 | .ctrl.mpa_len = htons(sizeof(struct iwarp_rdma_write) - 2), |
37 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_TAGGED | DDP_FLAG_LAST | |
38 | cpu_to_be16(DDP_VERSION << 8) | |
39 | cpu_to_be16(RDMAP_VERSION << 6) | |
40 | cpu_to_be16(RDMAP_RDMA_WRITE), |
41 | .rx_data = siw_proc_write }, |
42 | { /* RDMAP_RDMA_READ_REQ */ |
43 | .hdr_len = sizeof(struct iwarp_rdma_rreq), |
44 | .ctrl.mpa_len = htons(sizeof(struct iwarp_rdma_rreq) - 2), |
45 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_LAST | cpu_to_be16(DDP_VERSION << 8) | |
46 | cpu_to_be16(RDMAP_VERSION << 6) | |
47 | cpu_to_be16(RDMAP_RDMA_READ_REQ), |
48 | .rx_data = siw_proc_rreq }, |
49 | { /* RDMAP_RDMA_READ_RESP */ |
50 | .hdr_len = sizeof(struct iwarp_rdma_rresp), |
51 | .ctrl.mpa_len = htons(sizeof(struct iwarp_rdma_rresp) - 2), |
52 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_TAGGED | DDP_FLAG_LAST | |
53 | cpu_to_be16(DDP_VERSION << 8) | |
54 | cpu_to_be16(RDMAP_VERSION << 6) | |
55 | cpu_to_be16(RDMAP_RDMA_READ_RESP), |
56 | .rx_data = siw_proc_rresp }, |
57 | { /* RDMAP_SEND */ |
58 | .hdr_len = sizeof(struct iwarp_send), |
59 | .ctrl.mpa_len = htons(sizeof(struct iwarp_send) - 2), |
60 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_LAST | cpu_to_be16(DDP_VERSION << 8) | |
61 | cpu_to_be16(RDMAP_VERSION << 6) | |
62 | cpu_to_be16(RDMAP_SEND), |
63 | .rx_data = siw_proc_send }, |
64 | { /* RDMAP_SEND_INVAL */ |
65 | .hdr_len = sizeof(struct iwarp_send_inv), |
66 | .ctrl.mpa_len = htons(sizeof(struct iwarp_send_inv) - 2), |
67 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_LAST | cpu_to_be16(DDP_VERSION << 8) | |
68 | cpu_to_be16(RDMAP_VERSION << 6) | |
69 | cpu_to_be16(RDMAP_SEND_INVAL), |
70 | .rx_data = siw_proc_send }, |
71 | { /* RDMAP_SEND_SE */ |
72 | .hdr_len = sizeof(struct iwarp_send), |
73 | .ctrl.mpa_len = htons(sizeof(struct iwarp_send) - 2), |
74 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_LAST | cpu_to_be16(DDP_VERSION << 8) | |
75 | cpu_to_be16(RDMAP_VERSION << 6) | |
76 | cpu_to_be16(RDMAP_SEND_SE), |
77 | .rx_data = siw_proc_send }, |
78 | { /* RDMAP_SEND_SE_INVAL */ |
79 | .hdr_len = sizeof(struct iwarp_send_inv), |
80 | .ctrl.mpa_len = htons(sizeof(struct iwarp_send_inv) - 2), |
81 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_LAST | cpu_to_be16(DDP_VERSION << 8) | |
82 | cpu_to_be16(RDMAP_VERSION << 6) | |
83 | cpu_to_be16(RDMAP_SEND_SE_INVAL), |
84 | .rx_data = siw_proc_send }, |
85 | { /* RDMAP_TERMINATE */ |
86 | .hdr_len = sizeof(struct iwarp_terminate), |
87 | .ctrl.mpa_len = htons(sizeof(struct iwarp_terminate) - 2), |
88 | .ctrl.ddp_rdmap_ctrl = DDP_FLAG_LAST | cpu_to_be16(DDP_VERSION << 8) | |
89 | cpu_to_be16(RDMAP_VERSION << 6) | |
90 | cpu_to_be16(RDMAP_TERMINATE), |
91 | .rx_data = siw_proc_terminate } |
92 | }; |
93 | |
94 | void siw_qp_llp_data_ready(struct sock *sk) |
95 | { |
96 | struct siw_qp *qp; |
97 | |
98 | trace_sk_data_ready(sk); |
99 | |
100 | read_lock(&sk->sk_callback_lock); |
101 | |
102 | if (unlikely(!sk->sk_user_data || !sk_to_qp(sk))) |
103 | goto done; |
104 | |
105 | qp = sk_to_qp(sk); |
106 | |
107 | if (likely(!qp->rx_stream.rx_suspend && |
108 | down_read_trylock(&qp->state_lock))) { |
109 | read_descriptor_t rd_desc = { .arg.data = qp, .count = 1 }; |
110 | |
111 | if (likely(qp->attrs.state == SIW_QP_STATE_RTS)) |
112 | /* |
113 | * Implements data receive operation during |
114 | * socket callback. TCP gracefully catches |
115 | * the case where there is nothing to receive |
116 | * (not calling siw_tcp_rx_data() then). |
117 | */ |
118 | tcp_read_sock(sk, desc: &rd_desc, recv_actor: siw_tcp_rx_data); |
119 | |
120 | up_read(sem: &qp->state_lock); |
121 | } else { |
122 | siw_dbg_qp(qp, "unable to process RX, suspend: %d\n" , |
123 | qp->rx_stream.rx_suspend); |
124 | } |
125 | done: |
126 | read_unlock(&sk->sk_callback_lock); |
127 | } |
128 | |
129 | void siw_qp_llp_close(struct siw_qp *qp) |
130 | { |
131 | siw_dbg_qp(qp, "enter llp close, state = %s\n" , |
132 | siw_qp_state_to_string[qp->attrs.state]); |
133 | |
134 | down_write(sem: &qp->state_lock); |
135 | |
136 | qp->rx_stream.rx_suspend = 1; |
137 | qp->tx_ctx.tx_suspend = 1; |
138 | qp->attrs.sk = NULL; |
139 | |
140 | switch (qp->attrs.state) { |
141 | case SIW_QP_STATE_RTS: |
142 | case SIW_QP_STATE_RTR: |
143 | case SIW_QP_STATE_IDLE: |
144 | case SIW_QP_STATE_TERMINATE: |
145 | qp->attrs.state = SIW_QP_STATE_ERROR; |
146 | break; |
147 | /* |
148 | * SIW_QP_STATE_CLOSING: |
149 | * |
150 | * This is a forced close. shall the QP be moved to |
151 | * ERROR or IDLE ? |
152 | */ |
153 | case SIW_QP_STATE_CLOSING: |
154 | if (tx_wqe(qp)->wr_status == SIW_WR_IDLE) |
155 | qp->attrs.state = SIW_QP_STATE_ERROR; |
156 | else |
157 | qp->attrs.state = SIW_QP_STATE_IDLE; |
158 | break; |
159 | |
160 | default: |
161 | siw_dbg_qp(qp, "llp close: no state transition needed: %s\n" , |
162 | siw_qp_state_to_string[qp->attrs.state]); |
163 | break; |
164 | } |
165 | siw_sq_flush(qp); |
166 | siw_rq_flush(qp); |
167 | |
168 | /* |
169 | * Dereference closing CEP |
170 | */ |
171 | if (qp->cep) { |
172 | siw_cep_put(cep: qp->cep); |
173 | qp->cep = NULL; |
174 | } |
175 | |
176 | up_write(sem: &qp->state_lock); |
177 | |
178 | siw_dbg_qp(qp, "llp close exit: state %s\n" , |
179 | siw_qp_state_to_string[qp->attrs.state]); |
180 | } |
181 | |
182 | /* |
183 | * socket callback routine informing about newly available send space. |
184 | * Function schedules SQ work for processing SQ items. |
185 | */ |
186 | void siw_qp_llp_write_space(struct sock *sk) |
187 | { |
188 | struct siw_cep *cep; |
189 | |
190 | read_lock(&sk->sk_callback_lock); |
191 | |
192 | cep = sk_to_cep(sk); |
193 | if (cep) { |
194 | cep->sk_write_space(sk); |
195 | |
196 | if (!test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) |
197 | (void)siw_sq_start(qp: cep->qp); |
198 | } |
199 | |
200 | read_unlock(&sk->sk_callback_lock); |
201 | } |
202 | |
203 | static int siw_qp_readq_init(struct siw_qp *qp, int irq_size, int orq_size) |
204 | { |
205 | if (irq_size) { |
206 | irq_size = roundup_pow_of_two(irq_size); |
207 | qp->irq = vcalloc(n: irq_size, size: sizeof(struct siw_sqe)); |
208 | if (!qp->irq) { |
209 | qp->attrs.irq_size = 0; |
210 | return -ENOMEM; |
211 | } |
212 | } |
213 | if (orq_size) { |
214 | orq_size = roundup_pow_of_two(orq_size); |
215 | qp->orq = vcalloc(n: orq_size, size: sizeof(struct siw_sqe)); |
216 | if (!qp->orq) { |
217 | qp->attrs.orq_size = 0; |
218 | qp->attrs.irq_size = 0; |
219 | vfree(addr: qp->irq); |
220 | return -ENOMEM; |
221 | } |
222 | } |
223 | qp->attrs.irq_size = irq_size; |
224 | qp->attrs.orq_size = orq_size; |
225 | siw_dbg_qp(qp, "ORD %d, IRD %d\n" , orq_size, irq_size); |
226 | return 0; |
227 | } |
228 | |
229 | static int siw_qp_enable_crc(struct siw_qp *qp) |
230 | { |
231 | struct siw_rx_stream *c_rx = &qp->rx_stream; |
232 | struct siw_iwarp_tx *c_tx = &qp->tx_ctx; |
233 | int size; |
234 | |
235 | if (siw_crypto_shash == NULL) |
236 | return -ENOENT; |
237 | |
238 | size = crypto_shash_descsize(tfm: siw_crypto_shash) + |
239 | sizeof(struct shash_desc); |
240 | |
241 | c_tx->mpa_crc_hd = kzalloc(size, GFP_KERNEL); |
242 | c_rx->mpa_crc_hd = kzalloc(size, GFP_KERNEL); |
243 | if (!c_tx->mpa_crc_hd || !c_rx->mpa_crc_hd) { |
244 | kfree(objp: c_tx->mpa_crc_hd); |
245 | kfree(objp: c_rx->mpa_crc_hd); |
246 | c_tx->mpa_crc_hd = NULL; |
247 | c_rx->mpa_crc_hd = NULL; |
248 | return -ENOMEM; |
249 | } |
250 | c_tx->mpa_crc_hd->tfm = siw_crypto_shash; |
251 | c_rx->mpa_crc_hd->tfm = siw_crypto_shash; |
252 | |
253 | return 0; |
254 | } |
255 | |
256 | /* |
257 | * Send a non signalled READ or WRITE to peer side as negotiated |
258 | * with MPAv2 P2P setup protocol. The work request is only created |
259 | * as a current active WR and does not consume Send Queue space. |
260 | * |
261 | * Caller must hold QP state lock. |
262 | */ |
263 | int siw_qp_mpa_rts(struct siw_qp *qp, enum mpa_v2_ctrl ctrl) |
264 | { |
265 | struct siw_wqe *wqe = tx_wqe(qp); |
266 | unsigned long flags; |
267 | int rv = 0; |
268 | |
269 | spin_lock_irqsave(&qp->sq_lock, flags); |
270 | |
271 | if (unlikely(wqe->wr_status != SIW_WR_IDLE)) { |
272 | spin_unlock_irqrestore(lock: &qp->sq_lock, flags); |
273 | return -EIO; |
274 | } |
275 | memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); |
276 | |
277 | wqe->wr_status = SIW_WR_QUEUED; |
278 | wqe->sqe.flags = 0; |
279 | wqe->sqe.num_sge = 1; |
280 | wqe->sqe.sge[0].length = 0; |
281 | wqe->sqe.sge[0].laddr = 0; |
282 | wqe->sqe.sge[0].lkey = 0; |
283 | /* |
284 | * While it must not be checked for inbound zero length |
285 | * READ/WRITE, some HW may treat STag 0 special. |
286 | */ |
287 | wqe->sqe.rkey = 1; |
288 | wqe->sqe.raddr = 0; |
289 | wqe->processed = 0; |
290 | |
291 | if (ctrl & MPA_V2_RDMA_WRITE_RTR) |
292 | wqe->sqe.opcode = SIW_OP_WRITE; |
293 | else if (ctrl & MPA_V2_RDMA_READ_RTR) { |
294 | struct siw_sqe *rreq = NULL; |
295 | |
296 | wqe->sqe.opcode = SIW_OP_READ; |
297 | |
298 | spin_lock(lock: &qp->orq_lock); |
299 | |
300 | if (qp->attrs.orq_size) |
301 | rreq = orq_get_free(qp); |
302 | if (rreq) { |
303 | siw_read_to_orq(rreq, sqe: &wqe->sqe); |
304 | qp->orq_put++; |
305 | } else |
306 | rv = -EIO; |
307 | |
308 | spin_unlock(lock: &qp->orq_lock); |
309 | } else |
310 | rv = -EINVAL; |
311 | |
312 | if (rv) |
313 | wqe->wr_status = SIW_WR_IDLE; |
314 | |
315 | spin_unlock_irqrestore(lock: &qp->sq_lock, flags); |
316 | |
317 | if (!rv) |
318 | rv = siw_sq_start(qp); |
319 | |
320 | return rv; |
321 | } |
322 | |
323 | /* |
324 | * Map memory access error to DDP tagged error |
325 | */ |
326 | enum ddp_ecode siw_tagged_error(enum siw_access_state state) |
327 | { |
328 | switch (state) { |
329 | case E_STAG_INVALID: |
330 | return DDP_ECODE_T_INVALID_STAG; |
331 | case E_BASE_BOUNDS: |
332 | return DDP_ECODE_T_BASE_BOUNDS; |
333 | case E_PD_MISMATCH: |
334 | return DDP_ECODE_T_STAG_NOT_ASSOC; |
335 | case E_ACCESS_PERM: |
336 | /* |
337 | * RFC 5041 (DDP) lacks an ecode for insufficient access |
338 | * permissions. 'Invalid STag' seem to be the closest |
339 | * match though. |
340 | */ |
341 | return DDP_ECODE_T_INVALID_STAG; |
342 | default: |
343 | WARN_ON(1); |
344 | return DDP_ECODE_T_INVALID_STAG; |
345 | } |
346 | } |
347 | |
348 | /* |
349 | * Map memory access error to RDMAP protection error |
350 | */ |
351 | enum rdmap_ecode siw_rdmap_error(enum siw_access_state state) |
352 | { |
353 | switch (state) { |
354 | case E_STAG_INVALID: |
355 | return RDMAP_ECODE_INVALID_STAG; |
356 | case E_BASE_BOUNDS: |
357 | return RDMAP_ECODE_BASE_BOUNDS; |
358 | case E_PD_MISMATCH: |
359 | return RDMAP_ECODE_STAG_NOT_ASSOC; |
360 | case E_ACCESS_PERM: |
361 | return RDMAP_ECODE_ACCESS_RIGHTS; |
362 | default: |
363 | return RDMAP_ECODE_UNSPECIFIED; |
364 | } |
365 | } |
366 | |
367 | void siw_init_terminate(struct siw_qp *qp, enum term_elayer layer, u8 etype, |
368 | u8 ecode, int in_tx) |
369 | { |
370 | if (!qp->term_info.valid) { |
371 | memset(&qp->term_info, 0, sizeof(qp->term_info)); |
372 | qp->term_info.layer = layer; |
373 | qp->term_info.etype = etype; |
374 | qp->term_info.ecode = ecode; |
375 | qp->term_info.in_tx = in_tx; |
376 | qp->term_info.valid = 1; |
377 | } |
378 | siw_dbg_qp(qp, "init TERM: layer %d, type %d, code %d, in tx %s\n" , |
379 | layer, etype, ecode, in_tx ? "yes" : "no" ); |
380 | } |
381 | |
382 | /* |
383 | * Send a TERMINATE message, as defined in RFC's 5040/5041/5044/6581. |
384 | * Sending TERMINATE messages is best effort - such messages |
385 | * can only be send if the QP is still connected and it does |
386 | * not have another outbound message in-progress, i.e. the |
387 | * TERMINATE message must not interfer with an incomplete current |
388 | * transmit operation. |
389 | */ |
390 | void siw_send_terminate(struct siw_qp *qp) |
391 | { |
392 | struct kvec iov[3]; |
393 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_EOR }; |
394 | struct iwarp_terminate *term = NULL; |
395 | union iwarp_hdr *err_hdr = NULL; |
396 | struct socket *s = qp->attrs.sk; |
397 | struct siw_rx_stream *srx = &qp->rx_stream; |
398 | union iwarp_hdr *rx_hdr = &srx->hdr; |
399 | u32 crc = 0; |
400 | int num_frags, len_terminate, rv; |
401 | |
402 | if (!qp->term_info.valid) |
403 | return; |
404 | |
405 | qp->term_info.valid = 0; |
406 | |
407 | if (tx_wqe(qp)->wr_status == SIW_WR_INPROGRESS) { |
408 | siw_dbg_qp(qp, "cannot send TERMINATE: op %d in progress\n" , |
409 | tx_type(tx_wqe(qp))); |
410 | return; |
411 | } |
412 | if (!s && qp->cep) |
413 | /* QP not yet in RTS. Take socket from connection end point */ |
414 | s = qp->cep->sock; |
415 | |
416 | if (!s) { |
417 | siw_dbg_qp(qp, "cannot send TERMINATE: not connected\n" ); |
418 | return; |
419 | } |
420 | |
421 | term = kzalloc(size: sizeof(*term), GFP_KERNEL); |
422 | if (!term) |
423 | return; |
424 | |
425 | term->ddp_qn = cpu_to_be32(RDMAP_UNTAGGED_QN_TERMINATE); |
426 | term->ddp_mo = 0; |
427 | term->ddp_msn = cpu_to_be32(1); |
428 | |
429 | iov[0].iov_base = term; |
430 | iov[0].iov_len = sizeof(*term); |
431 | |
432 | if ((qp->term_info.layer == TERM_ERROR_LAYER_DDP) || |
433 | ((qp->term_info.layer == TERM_ERROR_LAYER_RDMAP) && |
434 | (qp->term_info.etype != RDMAP_ETYPE_CATASTROPHIC))) { |
435 | err_hdr = kzalloc(size: sizeof(*err_hdr), GFP_KERNEL); |
436 | if (!err_hdr) { |
437 | kfree(objp: term); |
438 | return; |
439 | } |
440 | } |
441 | memcpy(&term->ctrl, &iwarp_pktinfo[RDMAP_TERMINATE].ctrl, |
442 | sizeof(struct iwarp_ctrl)); |
443 | |
444 | __rdmap_term_set_layer(term, layer: qp->term_info.layer); |
445 | __rdmap_term_set_etype(term, etype: qp->term_info.etype); |
446 | __rdmap_term_set_ecode(term, ecode: qp->term_info.ecode); |
447 | |
448 | switch (qp->term_info.layer) { |
449 | case TERM_ERROR_LAYER_RDMAP: |
450 | if (qp->term_info.etype == RDMAP_ETYPE_CATASTROPHIC) |
451 | /* No additional DDP/RDMAP header to be included */ |
452 | break; |
453 | |
454 | if (qp->term_info.etype == RDMAP_ETYPE_REMOTE_PROTECTION) { |
455 | /* |
456 | * Complete RDMAP frame will get attached, and |
457 | * DDP segment length is valid |
458 | */ |
459 | term->flag_m = 1; |
460 | term->flag_d = 1; |
461 | term->flag_r = 1; |
462 | |
463 | if (qp->term_info.in_tx) { |
464 | struct iwarp_rdma_rreq *rreq; |
465 | struct siw_wqe *wqe = tx_wqe(qp); |
466 | |
467 | /* Inbound RREQ error, detected during |
468 | * RRESP creation. Take state from |
469 | * current TX work queue element to |
470 | * reconstruct peers RREQ. |
471 | */ |
472 | rreq = (struct iwarp_rdma_rreq *)err_hdr; |
473 | |
474 | memcpy(&rreq->ctrl, |
475 | &iwarp_pktinfo[RDMAP_RDMA_READ_REQ].ctrl, |
476 | sizeof(struct iwarp_ctrl)); |
477 | |
478 | rreq->rsvd = 0; |
479 | rreq->ddp_qn = |
480 | htonl(RDMAP_UNTAGGED_QN_RDMA_READ); |
481 | |
482 | /* Provide RREQ's MSN as kept aside */ |
483 | rreq->ddp_msn = htonl(wqe->sqe.sge[0].length); |
484 | |
485 | rreq->ddp_mo = htonl(wqe->processed); |
486 | rreq->sink_stag = htonl(wqe->sqe.rkey); |
487 | rreq->sink_to = cpu_to_be64(wqe->sqe.raddr); |
488 | rreq->read_size = htonl(wqe->sqe.sge[0].length); |
489 | rreq->source_stag = htonl(wqe->sqe.sge[0].lkey); |
490 | rreq->source_to = |
491 | cpu_to_be64(wqe->sqe.sge[0].laddr); |
492 | |
493 | iov[1].iov_base = rreq; |
494 | iov[1].iov_len = sizeof(*rreq); |
495 | |
496 | rx_hdr = (union iwarp_hdr *)rreq; |
497 | } else { |
498 | /* Take RDMAP/DDP information from |
499 | * current (failed) inbound frame. |
500 | */ |
501 | iov[1].iov_base = rx_hdr; |
502 | |
503 | if (__rdmap_get_opcode(ctrl: &rx_hdr->ctrl) == |
504 | RDMAP_RDMA_READ_REQ) |
505 | iov[1].iov_len = |
506 | sizeof(struct iwarp_rdma_rreq); |
507 | else /* SEND type */ |
508 | iov[1].iov_len = |
509 | sizeof(struct iwarp_send); |
510 | } |
511 | } else { |
512 | /* Do not report DDP hdr information if packet |
513 | * layout is unknown |
514 | */ |
515 | if ((qp->term_info.ecode == RDMAP_ECODE_VERSION) || |
516 | (qp->term_info.ecode == RDMAP_ECODE_OPCODE)) |
517 | break; |
518 | |
519 | iov[1].iov_base = rx_hdr; |
520 | |
521 | /* Only DDP frame will get attached */ |
522 | if (rx_hdr->ctrl.ddp_rdmap_ctrl & DDP_FLAG_TAGGED) |
523 | iov[1].iov_len = |
524 | sizeof(struct iwarp_rdma_write); |
525 | else |
526 | iov[1].iov_len = sizeof(struct iwarp_send); |
527 | |
528 | term->flag_m = 1; |
529 | term->flag_d = 1; |
530 | } |
531 | term->ctrl.mpa_len = cpu_to_be16(iov[1].iov_len); |
532 | break; |
533 | |
534 | case TERM_ERROR_LAYER_DDP: |
535 | /* Report error encountered while DDP processing. |
536 | * This can only happen as a result of inbound |
537 | * DDP processing |
538 | */ |
539 | |
540 | /* Do not report DDP hdr information if packet |
541 | * layout is unknown |
542 | */ |
543 | if (((qp->term_info.etype == DDP_ETYPE_TAGGED_BUF) && |
544 | (qp->term_info.ecode == DDP_ECODE_T_VERSION)) || |
545 | ((qp->term_info.etype == DDP_ETYPE_UNTAGGED_BUF) && |
546 | (qp->term_info.ecode == DDP_ECODE_UT_VERSION))) |
547 | break; |
548 | |
549 | iov[1].iov_base = rx_hdr; |
550 | |
551 | if (rx_hdr->ctrl.ddp_rdmap_ctrl & DDP_FLAG_TAGGED) |
552 | iov[1].iov_len = sizeof(struct iwarp_ctrl_tagged); |
553 | else |
554 | iov[1].iov_len = sizeof(struct iwarp_ctrl_untagged); |
555 | |
556 | term->flag_m = 1; |
557 | term->flag_d = 1; |
558 | break; |
559 | |
560 | default: |
561 | break; |
562 | } |
563 | if (term->flag_m || term->flag_d || term->flag_r) { |
564 | iov[2].iov_base = &crc; |
565 | iov[2].iov_len = sizeof(crc); |
566 | len_terminate = sizeof(*term) + iov[1].iov_len + MPA_CRC_SIZE; |
567 | num_frags = 3; |
568 | } else { |
569 | iov[1].iov_base = &crc; |
570 | iov[1].iov_len = sizeof(crc); |
571 | len_terminate = sizeof(*term) + MPA_CRC_SIZE; |
572 | num_frags = 2; |
573 | } |
574 | |
575 | /* Adjust DDP Segment Length parameter, if valid */ |
576 | if (term->flag_m) { |
577 | u32 real_ddp_len = be16_to_cpu(rx_hdr->ctrl.mpa_len); |
578 | enum rdma_opcode op = __rdmap_get_opcode(ctrl: &rx_hdr->ctrl); |
579 | |
580 | real_ddp_len -= iwarp_pktinfo[op].hdr_len - MPA_HDR_SIZE; |
581 | rx_hdr->ctrl.mpa_len = cpu_to_be16(real_ddp_len); |
582 | } |
583 | |
584 | term->ctrl.mpa_len = |
585 | cpu_to_be16(len_terminate - (MPA_HDR_SIZE + MPA_CRC_SIZE)); |
586 | if (qp->tx_ctx.mpa_crc_hd) { |
587 | crypto_shash_init(desc: qp->tx_ctx.mpa_crc_hd); |
588 | if (crypto_shash_update(desc: qp->tx_ctx.mpa_crc_hd, |
589 | data: (u8 *)iov[0].iov_base, |
590 | len: iov[0].iov_len)) |
591 | goto out; |
592 | |
593 | if (num_frags == 3) { |
594 | if (crypto_shash_update(desc: qp->tx_ctx.mpa_crc_hd, |
595 | data: (u8 *)iov[1].iov_base, |
596 | len: iov[1].iov_len)) |
597 | goto out; |
598 | } |
599 | crypto_shash_final(desc: qp->tx_ctx.mpa_crc_hd, out: (u8 *)&crc); |
600 | } |
601 | |
602 | rv = kernel_sendmsg(sock: s, msg: &msg, vec: iov, num: num_frags, len: len_terminate); |
603 | siw_dbg_qp(qp, "sent TERM: %s, layer %d, type %d, code %d (%d bytes)\n" , |
604 | rv == len_terminate ? "success" : "failure" , |
605 | __rdmap_term_layer(term), __rdmap_term_etype(term), |
606 | __rdmap_term_ecode(term), rv); |
607 | out: |
608 | kfree(objp: term); |
609 | kfree(objp: err_hdr); |
610 | } |
611 | |
612 | /* |
613 | * Handle all attrs other than state |
614 | */ |
615 | static void siw_qp_modify_nonstate(struct siw_qp *qp, |
616 | struct siw_qp_attrs *attrs, |
617 | enum siw_qp_attr_mask mask) |
618 | { |
619 | if (mask & SIW_QP_ATTR_ACCESS_FLAGS) { |
620 | if (attrs->flags & SIW_RDMA_BIND_ENABLED) |
621 | qp->attrs.flags |= SIW_RDMA_BIND_ENABLED; |
622 | else |
623 | qp->attrs.flags &= ~SIW_RDMA_BIND_ENABLED; |
624 | |
625 | if (attrs->flags & SIW_RDMA_WRITE_ENABLED) |
626 | qp->attrs.flags |= SIW_RDMA_WRITE_ENABLED; |
627 | else |
628 | qp->attrs.flags &= ~SIW_RDMA_WRITE_ENABLED; |
629 | |
630 | if (attrs->flags & SIW_RDMA_READ_ENABLED) |
631 | qp->attrs.flags |= SIW_RDMA_READ_ENABLED; |
632 | else |
633 | qp->attrs.flags &= ~SIW_RDMA_READ_ENABLED; |
634 | } |
635 | } |
636 | |
637 | static int siw_qp_nextstate_from_idle(struct siw_qp *qp, |
638 | struct siw_qp_attrs *attrs, |
639 | enum siw_qp_attr_mask mask) |
640 | { |
641 | int rv = 0; |
642 | |
643 | switch (attrs->state) { |
644 | case SIW_QP_STATE_RTS: |
645 | if (attrs->flags & SIW_MPA_CRC) { |
646 | rv = siw_qp_enable_crc(qp); |
647 | if (rv) |
648 | break; |
649 | } |
650 | if (!(mask & SIW_QP_ATTR_LLP_HANDLE)) { |
651 | siw_dbg_qp(qp, "no socket\n" ); |
652 | rv = -EINVAL; |
653 | break; |
654 | } |
655 | if (!(mask & SIW_QP_ATTR_MPA)) { |
656 | siw_dbg_qp(qp, "no MPA\n" ); |
657 | rv = -EINVAL; |
658 | break; |
659 | } |
660 | /* |
661 | * Initialize iWARP TX state |
662 | */ |
663 | qp->tx_ctx.ddp_msn[RDMAP_UNTAGGED_QN_SEND] = 0; |
664 | qp->tx_ctx.ddp_msn[RDMAP_UNTAGGED_QN_RDMA_READ] = 0; |
665 | qp->tx_ctx.ddp_msn[RDMAP_UNTAGGED_QN_TERMINATE] = 0; |
666 | |
667 | /* |
668 | * Initialize iWARP RX state |
669 | */ |
670 | qp->rx_stream.ddp_msn[RDMAP_UNTAGGED_QN_SEND] = 1; |
671 | qp->rx_stream.ddp_msn[RDMAP_UNTAGGED_QN_RDMA_READ] = 1; |
672 | qp->rx_stream.ddp_msn[RDMAP_UNTAGGED_QN_TERMINATE] = 1; |
673 | |
674 | /* |
675 | * init IRD free queue, caller has already checked |
676 | * limits. |
677 | */ |
678 | rv = siw_qp_readq_init(qp, irq_size: attrs->irq_size, |
679 | orq_size: attrs->orq_size); |
680 | if (rv) |
681 | break; |
682 | |
683 | qp->attrs.sk = attrs->sk; |
684 | qp->attrs.state = SIW_QP_STATE_RTS; |
685 | |
686 | siw_dbg_qp(qp, "enter RTS: crc=%s, ord=%u, ird=%u\n" , |
687 | attrs->flags & SIW_MPA_CRC ? "y" : "n" , |
688 | qp->attrs.orq_size, qp->attrs.irq_size); |
689 | break; |
690 | |
691 | case SIW_QP_STATE_ERROR: |
692 | siw_rq_flush(qp); |
693 | qp->attrs.state = SIW_QP_STATE_ERROR; |
694 | if (qp->cep) { |
695 | siw_cep_put(cep: qp->cep); |
696 | qp->cep = NULL; |
697 | } |
698 | break; |
699 | |
700 | default: |
701 | break; |
702 | } |
703 | return rv; |
704 | } |
705 | |
706 | static int siw_qp_nextstate_from_rts(struct siw_qp *qp, |
707 | struct siw_qp_attrs *attrs) |
708 | { |
709 | int drop_conn = 0; |
710 | |
711 | switch (attrs->state) { |
712 | case SIW_QP_STATE_CLOSING: |
713 | /* |
714 | * Verbs: move to IDLE if SQ and ORQ are empty. |
715 | * Move to ERROR otherwise. But first of all we must |
716 | * close the connection. So we keep CLOSING or ERROR |
717 | * as a transient state, schedule connection drop work |
718 | * and wait for the socket state change upcall to |
719 | * come back closed. |
720 | */ |
721 | if (tx_wqe(qp)->wr_status == SIW_WR_IDLE) { |
722 | qp->attrs.state = SIW_QP_STATE_CLOSING; |
723 | } else { |
724 | qp->attrs.state = SIW_QP_STATE_ERROR; |
725 | siw_sq_flush(qp); |
726 | } |
727 | siw_rq_flush(qp); |
728 | |
729 | drop_conn = 1; |
730 | break; |
731 | |
732 | case SIW_QP_STATE_TERMINATE: |
733 | qp->attrs.state = SIW_QP_STATE_TERMINATE; |
734 | |
735 | siw_init_terminate(qp, layer: TERM_ERROR_LAYER_RDMAP, |
736 | etype: RDMAP_ETYPE_CATASTROPHIC, |
737 | ecode: RDMAP_ECODE_UNSPECIFIED, in_tx: 1); |
738 | drop_conn = 1; |
739 | break; |
740 | |
741 | case SIW_QP_STATE_ERROR: |
742 | /* |
743 | * This is an emergency close. |
744 | * |
745 | * Any in progress transmit operation will get |
746 | * cancelled. |
747 | * This will likely result in a protocol failure, |
748 | * if a TX operation is in transit. The caller |
749 | * could unconditional wait to give the current |
750 | * operation a chance to complete. |
751 | * Esp., how to handle the non-empty IRQ case? |
752 | * The peer was asking for data transfer at a valid |
753 | * point in time. |
754 | */ |
755 | siw_sq_flush(qp); |
756 | siw_rq_flush(qp); |
757 | qp->attrs.state = SIW_QP_STATE_ERROR; |
758 | drop_conn = 1; |
759 | break; |
760 | |
761 | default: |
762 | break; |
763 | } |
764 | return drop_conn; |
765 | } |
766 | |
767 | static void siw_qp_nextstate_from_term(struct siw_qp *qp, |
768 | struct siw_qp_attrs *attrs) |
769 | { |
770 | switch (attrs->state) { |
771 | case SIW_QP_STATE_ERROR: |
772 | siw_rq_flush(qp); |
773 | qp->attrs.state = SIW_QP_STATE_ERROR; |
774 | |
775 | if (tx_wqe(qp)->wr_status != SIW_WR_IDLE) |
776 | siw_sq_flush(qp); |
777 | break; |
778 | |
779 | default: |
780 | break; |
781 | } |
782 | } |
783 | |
784 | static int siw_qp_nextstate_from_close(struct siw_qp *qp, |
785 | struct siw_qp_attrs *attrs) |
786 | { |
787 | int rv = 0; |
788 | |
789 | switch (attrs->state) { |
790 | case SIW_QP_STATE_IDLE: |
791 | WARN_ON(tx_wqe(qp)->wr_status != SIW_WR_IDLE); |
792 | qp->attrs.state = SIW_QP_STATE_IDLE; |
793 | break; |
794 | |
795 | case SIW_QP_STATE_CLOSING: |
796 | /* |
797 | * The LLP may already moved the QP to closing |
798 | * due to graceful peer close init |
799 | */ |
800 | break; |
801 | |
802 | case SIW_QP_STATE_ERROR: |
803 | /* |
804 | * QP was moved to CLOSING by LLP event |
805 | * not yet seen by user. |
806 | */ |
807 | qp->attrs.state = SIW_QP_STATE_ERROR; |
808 | |
809 | if (tx_wqe(qp)->wr_status != SIW_WR_IDLE) |
810 | siw_sq_flush(qp); |
811 | |
812 | siw_rq_flush(qp); |
813 | break; |
814 | |
815 | default: |
816 | siw_dbg_qp(qp, "state transition undefined: %s => %s\n" , |
817 | siw_qp_state_to_string[qp->attrs.state], |
818 | siw_qp_state_to_string[attrs->state]); |
819 | |
820 | rv = -ECONNABORTED; |
821 | } |
822 | return rv; |
823 | } |
824 | |
825 | /* |
826 | * Caller must hold qp->state_lock |
827 | */ |
828 | int siw_qp_modify(struct siw_qp *qp, struct siw_qp_attrs *attrs, |
829 | enum siw_qp_attr_mask mask) |
830 | { |
831 | int drop_conn = 0, rv = 0; |
832 | |
833 | if (!mask) |
834 | return 0; |
835 | |
836 | siw_dbg_qp(qp, "state: %s => %s\n" , |
837 | siw_qp_state_to_string[qp->attrs.state], |
838 | siw_qp_state_to_string[attrs->state]); |
839 | |
840 | if (mask != SIW_QP_ATTR_STATE) |
841 | siw_qp_modify_nonstate(qp, attrs, mask); |
842 | |
843 | if (!(mask & SIW_QP_ATTR_STATE)) |
844 | return 0; |
845 | |
846 | switch (qp->attrs.state) { |
847 | case SIW_QP_STATE_IDLE: |
848 | case SIW_QP_STATE_RTR: |
849 | rv = siw_qp_nextstate_from_idle(qp, attrs, mask); |
850 | break; |
851 | |
852 | case SIW_QP_STATE_RTS: |
853 | drop_conn = siw_qp_nextstate_from_rts(qp, attrs); |
854 | break; |
855 | |
856 | case SIW_QP_STATE_TERMINATE: |
857 | siw_qp_nextstate_from_term(qp, attrs); |
858 | break; |
859 | |
860 | case SIW_QP_STATE_CLOSING: |
861 | siw_qp_nextstate_from_close(qp, attrs); |
862 | break; |
863 | default: |
864 | break; |
865 | } |
866 | if (drop_conn) |
867 | siw_qp_cm_drop(qp, schedule: 0); |
868 | |
869 | return rv; |
870 | } |
871 | |
872 | void siw_read_to_orq(struct siw_sqe *rreq, struct siw_sqe *sqe) |
873 | { |
874 | rreq->id = sqe->id; |
875 | rreq->opcode = sqe->opcode; |
876 | rreq->sge[0].laddr = sqe->sge[0].laddr; |
877 | rreq->sge[0].length = sqe->sge[0].length; |
878 | rreq->sge[0].lkey = sqe->sge[0].lkey; |
879 | rreq->sge[1].lkey = sqe->sge[1].lkey; |
880 | rreq->flags = sqe->flags | SIW_WQE_VALID; |
881 | rreq->num_sge = 1; |
882 | } |
883 | |
884 | static int siw_activate_tx_from_sq(struct siw_qp *qp) |
885 | { |
886 | struct siw_sqe *sqe; |
887 | struct siw_wqe *wqe = tx_wqe(qp); |
888 | int rv = 1; |
889 | |
890 | sqe = sq_get_next(qp); |
891 | if (!sqe) |
892 | return 0; |
893 | |
894 | memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); |
895 | wqe->wr_status = SIW_WR_QUEUED; |
896 | |
897 | /* First copy SQE to kernel private memory */ |
898 | memcpy(&wqe->sqe, sqe, sizeof(*sqe)); |
899 | |
900 | if (wqe->sqe.opcode >= SIW_NUM_OPCODES) { |
901 | rv = -EINVAL; |
902 | goto out; |
903 | } |
904 | if (wqe->sqe.flags & SIW_WQE_INLINE) { |
905 | if (wqe->sqe.opcode != SIW_OP_SEND && |
906 | wqe->sqe.opcode != SIW_OP_WRITE) { |
907 | rv = -EINVAL; |
908 | goto out; |
909 | } |
910 | if (wqe->sqe.sge[0].length > SIW_MAX_INLINE) { |
911 | rv = -EINVAL; |
912 | goto out; |
913 | } |
914 | wqe->sqe.sge[0].laddr = (uintptr_t)&wqe->sqe.sge[1]; |
915 | wqe->sqe.sge[0].lkey = 0; |
916 | wqe->sqe.num_sge = 1; |
917 | } |
918 | if (wqe->sqe.flags & SIW_WQE_READ_FENCE) { |
919 | /* A READ cannot be fenced */ |
920 | if (unlikely(wqe->sqe.opcode == SIW_OP_READ || |
921 | wqe->sqe.opcode == |
922 | SIW_OP_READ_LOCAL_INV)) { |
923 | siw_dbg_qp(qp, "cannot fence read\n" ); |
924 | rv = -EINVAL; |
925 | goto out; |
926 | } |
927 | spin_lock(lock: &qp->orq_lock); |
928 | |
929 | if (qp->attrs.orq_size && !siw_orq_empty(qp)) { |
930 | qp->tx_ctx.orq_fence = 1; |
931 | rv = 0; |
932 | } |
933 | spin_unlock(lock: &qp->orq_lock); |
934 | |
935 | } else if (wqe->sqe.opcode == SIW_OP_READ || |
936 | wqe->sqe.opcode == SIW_OP_READ_LOCAL_INV) { |
937 | struct siw_sqe *rreq; |
938 | |
939 | if (unlikely(!qp->attrs.orq_size)) { |
940 | /* We negotiated not to send READ req's */ |
941 | rv = -EINVAL; |
942 | goto out; |
943 | } |
944 | wqe->sqe.num_sge = 1; |
945 | |
946 | spin_lock(lock: &qp->orq_lock); |
947 | |
948 | rreq = orq_get_free(qp); |
949 | if (rreq) { |
950 | /* |
951 | * Make an immediate copy in ORQ to be ready |
952 | * to process loopback READ reply |
953 | */ |
954 | siw_read_to_orq(rreq, sqe: &wqe->sqe); |
955 | qp->orq_put++; |
956 | } else { |
957 | qp->tx_ctx.orq_fence = 1; |
958 | rv = 0; |
959 | } |
960 | spin_unlock(lock: &qp->orq_lock); |
961 | } |
962 | |
963 | /* Clear SQE, can be re-used by application */ |
964 | smp_store_mb(sqe->flags, 0); |
965 | qp->sq_get++; |
966 | out: |
967 | if (unlikely(rv < 0)) { |
968 | siw_dbg_qp(qp, "error %d\n" , rv); |
969 | wqe->wr_status = SIW_WR_IDLE; |
970 | } |
971 | return rv; |
972 | } |
973 | |
974 | /* |
975 | * Must be called with SQ locked. |
976 | * To avoid complete SQ starvation by constant inbound READ requests, |
977 | * the active IRQ will not be served after qp->irq_burst, if the |
978 | * SQ has pending work. |
979 | */ |
980 | int siw_activate_tx(struct siw_qp *qp) |
981 | { |
982 | struct siw_sqe *irqe; |
983 | struct siw_wqe *wqe = tx_wqe(qp); |
984 | |
985 | if (!qp->attrs.irq_size) |
986 | return siw_activate_tx_from_sq(qp); |
987 | |
988 | irqe = &qp->irq[qp->irq_get % qp->attrs.irq_size]; |
989 | |
990 | if (!(irqe->flags & SIW_WQE_VALID)) |
991 | return siw_activate_tx_from_sq(qp); |
992 | |
993 | /* |
994 | * Avoid local WQE processing starvation in case |
995 | * of constant inbound READ request stream |
996 | */ |
997 | if (sq_get_next(qp) && ++qp->irq_burst >= SIW_IRQ_MAXBURST_SQ_ACTIVE) { |
998 | qp->irq_burst = 0; |
999 | return siw_activate_tx_from_sq(qp); |
1000 | } |
1001 | memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); |
1002 | wqe->wr_status = SIW_WR_QUEUED; |
1003 | |
1004 | /* start READ RESPONSE */ |
1005 | wqe->sqe.opcode = SIW_OP_READ_RESPONSE; |
1006 | wqe->sqe.flags = 0; |
1007 | if (irqe->num_sge) { |
1008 | wqe->sqe.num_sge = 1; |
1009 | wqe->sqe.sge[0].length = irqe->sge[0].length; |
1010 | wqe->sqe.sge[0].laddr = irqe->sge[0].laddr; |
1011 | wqe->sqe.sge[0].lkey = irqe->sge[0].lkey; |
1012 | } else { |
1013 | wqe->sqe.num_sge = 0; |
1014 | } |
1015 | |
1016 | /* Retain original RREQ's message sequence number for |
1017 | * potential error reporting cases. |
1018 | */ |
1019 | wqe->sqe.sge[1].length = irqe->sge[1].length; |
1020 | |
1021 | wqe->sqe.rkey = irqe->rkey; |
1022 | wqe->sqe.raddr = irqe->raddr; |
1023 | |
1024 | wqe->processed = 0; |
1025 | qp->irq_get++; |
1026 | |
1027 | /* mark current IRQ entry free */ |
1028 | smp_store_mb(irqe->flags, 0); |
1029 | |
1030 | return 1; |
1031 | } |
1032 | |
1033 | /* |
1034 | * Check if current CQ state qualifies for calling CQ completion |
1035 | * handler. Must be called with CQ lock held. |
1036 | */ |
1037 | static bool siw_cq_notify_now(struct siw_cq *cq, u32 flags) |
1038 | { |
1039 | u32 cq_notify; |
1040 | |
1041 | if (!cq->base_cq.comp_handler) |
1042 | return false; |
1043 | |
1044 | /* Read application shared notification state */ |
1045 | cq_notify = READ_ONCE(cq->notify->flags); |
1046 | |
1047 | if ((cq_notify & SIW_NOTIFY_NEXT_COMPLETION) || |
1048 | ((cq_notify & SIW_NOTIFY_SOLICITED) && |
1049 | (flags & SIW_WQE_SOLICITED))) { |
1050 | /* |
1051 | * CQ notification is one-shot: Since the |
1052 | * current CQE causes user notification, |
1053 | * the CQ gets dis-aremd and must be re-aremd |
1054 | * by the user for a new notification. |
1055 | */ |
1056 | WRITE_ONCE(cq->notify->flags, SIW_NOTIFY_NOT); |
1057 | |
1058 | return true; |
1059 | } |
1060 | return false; |
1061 | } |
1062 | |
1063 | int siw_sqe_complete(struct siw_qp *qp, struct siw_sqe *sqe, u32 bytes, |
1064 | enum siw_wc_status status) |
1065 | { |
1066 | struct siw_cq *cq = qp->scq; |
1067 | int rv = 0; |
1068 | |
1069 | if (cq) { |
1070 | u32 sqe_flags = sqe->flags; |
1071 | struct siw_cqe *cqe; |
1072 | u32 idx; |
1073 | unsigned long flags; |
1074 | |
1075 | spin_lock_irqsave(&cq->lock, flags); |
1076 | |
1077 | idx = cq->cq_put % cq->num_cqe; |
1078 | cqe = &cq->queue[idx]; |
1079 | |
1080 | if (!READ_ONCE(cqe->flags)) { |
1081 | bool notify; |
1082 | |
1083 | cqe->id = sqe->id; |
1084 | cqe->opcode = sqe->opcode; |
1085 | cqe->status = status; |
1086 | cqe->imm_data = 0; |
1087 | cqe->bytes = bytes; |
1088 | |
1089 | if (rdma_is_kernel_res(res: &cq->base_cq.res)) |
1090 | cqe->base_qp = &qp->base_qp; |
1091 | else |
1092 | cqe->qp_id = qp_id(qp); |
1093 | |
1094 | /* mark CQE valid for application */ |
1095 | WRITE_ONCE(cqe->flags, SIW_WQE_VALID); |
1096 | /* recycle SQE */ |
1097 | smp_store_mb(sqe->flags, 0); |
1098 | |
1099 | cq->cq_put++; |
1100 | notify = siw_cq_notify_now(cq, flags: sqe_flags); |
1101 | |
1102 | spin_unlock_irqrestore(lock: &cq->lock, flags); |
1103 | |
1104 | if (notify) { |
1105 | siw_dbg_cq(cq, "Call completion handler\n" ); |
1106 | cq->base_cq.comp_handler(&cq->base_cq, |
1107 | cq->base_cq.cq_context); |
1108 | } |
1109 | } else { |
1110 | spin_unlock_irqrestore(lock: &cq->lock, flags); |
1111 | rv = -ENOMEM; |
1112 | siw_cq_event(cq, type: IB_EVENT_CQ_ERR); |
1113 | } |
1114 | } else { |
1115 | /* recycle SQE */ |
1116 | smp_store_mb(sqe->flags, 0); |
1117 | } |
1118 | return rv; |
1119 | } |
1120 | |
1121 | int siw_rqe_complete(struct siw_qp *qp, struct siw_rqe *rqe, u32 bytes, |
1122 | u32 inval_stag, enum siw_wc_status status) |
1123 | { |
1124 | struct siw_cq *cq = qp->rcq; |
1125 | int rv = 0; |
1126 | |
1127 | if (cq) { |
1128 | struct siw_cqe *cqe; |
1129 | u32 idx; |
1130 | unsigned long flags; |
1131 | |
1132 | spin_lock_irqsave(&cq->lock, flags); |
1133 | |
1134 | idx = cq->cq_put % cq->num_cqe; |
1135 | cqe = &cq->queue[idx]; |
1136 | |
1137 | if (!READ_ONCE(cqe->flags)) { |
1138 | bool notify; |
1139 | u8 cqe_flags = SIW_WQE_VALID; |
1140 | |
1141 | cqe->id = rqe->id; |
1142 | cqe->opcode = SIW_OP_RECEIVE; |
1143 | cqe->status = status; |
1144 | cqe->imm_data = 0; |
1145 | cqe->bytes = bytes; |
1146 | |
1147 | if (rdma_is_kernel_res(res: &cq->base_cq.res)) { |
1148 | cqe->base_qp = &qp->base_qp; |
1149 | if (inval_stag) { |
1150 | cqe_flags |= SIW_WQE_REM_INVAL; |
1151 | cqe->inval_stag = inval_stag; |
1152 | } |
1153 | } else { |
1154 | cqe->qp_id = qp_id(qp); |
1155 | } |
1156 | /* mark CQE valid for application */ |
1157 | WRITE_ONCE(cqe->flags, cqe_flags); |
1158 | /* recycle RQE */ |
1159 | smp_store_mb(rqe->flags, 0); |
1160 | |
1161 | cq->cq_put++; |
1162 | notify = siw_cq_notify_now(cq, flags: SIW_WQE_SIGNALLED); |
1163 | |
1164 | spin_unlock_irqrestore(lock: &cq->lock, flags); |
1165 | |
1166 | if (notify) { |
1167 | siw_dbg_cq(cq, "Call completion handler\n" ); |
1168 | cq->base_cq.comp_handler(&cq->base_cq, |
1169 | cq->base_cq.cq_context); |
1170 | } |
1171 | } else { |
1172 | spin_unlock_irqrestore(lock: &cq->lock, flags); |
1173 | rv = -ENOMEM; |
1174 | siw_cq_event(cq, type: IB_EVENT_CQ_ERR); |
1175 | } |
1176 | } else { |
1177 | /* recycle RQE */ |
1178 | smp_store_mb(rqe->flags, 0); |
1179 | } |
1180 | return rv; |
1181 | } |
1182 | |
1183 | /* |
1184 | * siw_sq_flush() |
1185 | * |
1186 | * Flush SQ and ORQ entries to CQ. |
1187 | * |
1188 | * Must be called with QP state write lock held. |
1189 | * Therefore, SQ and ORQ lock must not be taken. |
1190 | */ |
1191 | void siw_sq_flush(struct siw_qp *qp) |
1192 | { |
1193 | struct siw_sqe *sqe; |
1194 | struct siw_wqe *wqe = tx_wqe(qp); |
1195 | int async_event = 0; |
1196 | |
1197 | /* |
1198 | * Start with completing any work currently on the ORQ |
1199 | */ |
1200 | while (qp->attrs.orq_size) { |
1201 | sqe = &qp->orq[qp->orq_get % qp->attrs.orq_size]; |
1202 | if (!READ_ONCE(sqe->flags)) |
1203 | break; |
1204 | |
1205 | if (siw_sqe_complete(qp, sqe, bytes: 0, status: SIW_WC_WR_FLUSH_ERR) != 0) |
1206 | break; |
1207 | |
1208 | WRITE_ONCE(sqe->flags, 0); |
1209 | qp->orq_get++; |
1210 | } |
1211 | /* |
1212 | * Flush an in-progress WQE if present |
1213 | */ |
1214 | if (wqe->wr_status != SIW_WR_IDLE) { |
1215 | siw_dbg_qp(qp, "flush current SQE, type %d, status %d\n" , |
1216 | tx_type(wqe), wqe->wr_status); |
1217 | |
1218 | siw_wqe_put_mem(wqe, tx_type(wqe)); |
1219 | |
1220 | if (tx_type(wqe) != SIW_OP_READ_RESPONSE && |
1221 | ((tx_type(wqe) != SIW_OP_READ && |
1222 | tx_type(wqe) != SIW_OP_READ_LOCAL_INV) || |
1223 | wqe->wr_status == SIW_WR_QUEUED)) |
1224 | /* |
1225 | * An in-progress Read Request is already in |
1226 | * the ORQ |
1227 | */ |
1228 | siw_sqe_complete(qp, sqe: &wqe->sqe, bytes: wqe->bytes, |
1229 | status: SIW_WC_WR_FLUSH_ERR); |
1230 | |
1231 | wqe->wr_status = SIW_WR_IDLE; |
1232 | } |
1233 | /* |
1234 | * Flush the Send Queue |
1235 | */ |
1236 | while (qp->attrs.sq_size) { |
1237 | sqe = &qp->sendq[qp->sq_get % qp->attrs.sq_size]; |
1238 | if (!READ_ONCE(sqe->flags)) |
1239 | break; |
1240 | |
1241 | async_event = 1; |
1242 | if (siw_sqe_complete(qp, sqe, bytes: 0, status: SIW_WC_WR_FLUSH_ERR) != 0) |
1243 | /* |
1244 | * Shall IB_EVENT_SQ_DRAINED be supressed if work |
1245 | * completion fails? |
1246 | */ |
1247 | break; |
1248 | |
1249 | WRITE_ONCE(sqe->flags, 0); |
1250 | qp->sq_get++; |
1251 | } |
1252 | if (async_event) |
1253 | siw_qp_event(qp, type: IB_EVENT_SQ_DRAINED); |
1254 | } |
1255 | |
1256 | /* |
1257 | * siw_rq_flush() |
1258 | * |
1259 | * Flush recv queue entries to CQ. Also |
1260 | * takes care of pending active tagged and untagged |
1261 | * inbound transfers, which have target memory |
1262 | * referenced. |
1263 | * |
1264 | * Must be called with QP state write lock held. |
1265 | * Therefore, RQ lock must not be taken. |
1266 | */ |
1267 | void siw_rq_flush(struct siw_qp *qp) |
1268 | { |
1269 | struct siw_wqe *wqe = &qp->rx_untagged.wqe_active; |
1270 | |
1271 | /* |
1272 | * Flush an in-progress untagged operation if present |
1273 | */ |
1274 | if (wqe->wr_status != SIW_WR_IDLE) { |
1275 | siw_dbg_qp(qp, "flush current rqe, type %d, status %d\n" , |
1276 | rx_type(wqe), wqe->wr_status); |
1277 | |
1278 | siw_wqe_put_mem(wqe, rx_type(wqe)); |
1279 | |
1280 | if (rx_type(wqe) == SIW_OP_RECEIVE) { |
1281 | siw_rqe_complete(qp, rqe: &wqe->rqe, bytes: wqe->bytes, |
1282 | inval_stag: 0, status: SIW_WC_WR_FLUSH_ERR); |
1283 | } else if (rx_type(wqe) != SIW_OP_READ && |
1284 | rx_type(wqe) != SIW_OP_READ_RESPONSE && |
1285 | rx_type(wqe) != SIW_OP_WRITE) { |
1286 | siw_sqe_complete(qp, sqe: &wqe->sqe, bytes: 0, status: SIW_WC_WR_FLUSH_ERR); |
1287 | } |
1288 | wqe->wr_status = SIW_WR_IDLE; |
1289 | } |
1290 | wqe = &qp->rx_tagged.wqe_active; |
1291 | |
1292 | if (wqe->wr_status != SIW_WR_IDLE) { |
1293 | siw_wqe_put_mem(wqe, rx_type(wqe)); |
1294 | wqe->wr_status = SIW_WR_IDLE; |
1295 | } |
1296 | /* |
1297 | * Flush the Receive Queue |
1298 | */ |
1299 | while (qp->attrs.rq_size) { |
1300 | struct siw_rqe *rqe = |
1301 | &qp->recvq[qp->rq_get % qp->attrs.rq_size]; |
1302 | |
1303 | if (!READ_ONCE(rqe->flags)) |
1304 | break; |
1305 | |
1306 | if (siw_rqe_complete(qp, rqe, bytes: 0, inval_stag: 0, status: SIW_WC_WR_FLUSH_ERR) != 0) |
1307 | break; |
1308 | |
1309 | WRITE_ONCE(rqe->flags, 0); |
1310 | qp->rq_get++; |
1311 | } |
1312 | } |
1313 | |
1314 | int siw_qp_add(struct siw_device *sdev, struct siw_qp *qp) |
1315 | { |
1316 | int rv = xa_alloc(xa: &sdev->qp_xa, id: &qp->base_qp.qp_num, entry: qp, xa_limit_32b, |
1317 | GFP_KERNEL); |
1318 | |
1319 | if (!rv) { |
1320 | kref_init(kref: &qp->ref); |
1321 | qp->sdev = sdev; |
1322 | siw_dbg_qp(qp, "new QP\n" ); |
1323 | } |
1324 | return rv; |
1325 | } |
1326 | |
1327 | void siw_free_qp(struct kref *ref) |
1328 | { |
1329 | struct siw_qp *found, *qp = container_of(ref, struct siw_qp, ref); |
1330 | struct siw_device *sdev = qp->sdev; |
1331 | unsigned long flags; |
1332 | |
1333 | if (qp->cep) |
1334 | siw_cep_put(cep: qp->cep); |
1335 | |
1336 | found = xa_erase(&sdev->qp_xa, index: qp_id(qp)); |
1337 | WARN_ON(found != qp); |
1338 | spin_lock_irqsave(&sdev->lock, flags); |
1339 | list_del(entry: &qp->devq); |
1340 | spin_unlock_irqrestore(lock: &sdev->lock, flags); |
1341 | |
1342 | vfree(addr: qp->sendq); |
1343 | vfree(addr: qp->recvq); |
1344 | vfree(addr: qp->irq); |
1345 | vfree(addr: qp->orq); |
1346 | |
1347 | siw_put_tx_cpu(cpu: qp->tx_cpu); |
1348 | complete(&qp->qp_free); |
1349 | atomic_dec(v: &sdev->num_qp); |
1350 | } |
1351 | |