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RDMA/cxgb4: Don't use null ep ptr
[linux-2.6-block.git] / drivers / infiniband / hw / cxgb4 / qp.c
CommitLineData
cfdda9d7
SW		 1/*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32#include "iw_cxgb4.h"
33
34static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
35 struct c4iw_dev_ucontext *uctx)
36{
37 /*
38 * uP clears EQ contexts when the connection exits rdma mode,
39 * so no need to post a RESET WR for these EQs.
40 */
41 dma_free_coherent(&(rdev->lldi.pdev->dev),
42 wq->rq.memsize, wq->rq.queue,
f38926aa 43 dma_unmap_addr(&wq->rq, mapping));
cfdda9d7
SW		 44 dma_free_coherent(&(rdev->lldi.pdev->dev),
45 wq->sq.memsize, wq->sq.queue,
f38926aa 46 dma_unmap_addr(&wq->sq, mapping));
cfdda9d7
SW		 47 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
48 kfree(wq->rq.sw_rq);
49 kfree(wq->sq.sw_sq);
50 c4iw_put_qpid(rdev, wq->rq.qid, uctx);
51 c4iw_put_qpid(rdev, wq->sq.qid, uctx);
52 return 0;
53}
54
55static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
56 struct t4_cq *rcq, struct t4_cq *scq,
57 struct c4iw_dev_ucontext *uctx)
58{
59 int user = (uctx != &rdev->uctx);
60 struct fw_ri_res_wr *res_wr;
61 struct fw_ri_res *res;
62 int wr_len;
63 struct c4iw_wr_wait wr_wait;
64 struct sk_buff *skb;
65 int ret;
66 int eqsize;
67
68 wq->sq.qid = c4iw_get_qpid(rdev, uctx);
69 if (!wq->sq.qid)
70 return -ENOMEM;
71
72 wq->rq.qid = c4iw_get_qpid(rdev, uctx);
73 if (!wq->rq.qid)
74 goto err1;
75
76 if (!user) {
77 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq,
78 GFP_KERNEL);
79 if (!wq->sq.sw_sq)
80 goto err2;
81
82 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq,
83 GFP_KERNEL);
84 if (!wq->rq.sw_rq)
85 goto err3;
86 }
87
88 /*
89 * RQT must be a power of 2.
90 */
91 wq->rq.rqt_size = roundup_pow_of_two(wq->rq.size);
92 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size);
93 if (!wq->rq.rqt_hwaddr)
94 goto err4;
95
96 wq->sq.queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev),
97 wq->sq.memsize, &(wq->sq.dma_addr),
98 GFP_KERNEL);
99 if (!wq->sq.queue)
100 goto err5;
101 memset(wq->sq.queue, 0, wq->sq.memsize);
f38926aa 102 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr);
cfdda9d7
SW		 103
104 wq->rq.queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev),
105 wq->rq.memsize, &(wq->rq.dma_addr),
106 GFP_KERNEL);
107 if (!wq->rq.queue)
108 goto err6;
109 PDBG("%s sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n",
110 __func__, wq->sq.queue,
111 (unsigned long long)virt_to_phys(wq->sq.queue),
112 wq->rq.queue,
113 (unsigned long long)virt_to_phys(wq->rq.queue));
114 memset(wq->rq.queue, 0, wq->rq.memsize);
f38926aa 115 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr);
cfdda9d7
SW		 116
117 wq->db = rdev->lldi.db_reg;
118 wq->gts = rdev->lldi.gts_reg;
119 if (user) {
120 wq->sq.udb = (u64)pci_resource_start(rdev->lldi.pdev, 2) +
121 (wq->sq.qid << rdev->qpshift);
122 wq->sq.udb &= PAGE_MASK;
123 wq->rq.udb = (u64)pci_resource_start(rdev->lldi.pdev, 2) +
124 (wq->rq.qid << rdev->qpshift);
125 wq->rq.udb &= PAGE_MASK;
126 }
127 wq->rdev = rdev;
128 wq->rq.msn = 1;
129
130 /* build fw_ri_res_wr */
131 wr_len = sizeof *res_wr + 2 * sizeof *res;
132
d3c814e8 133 skb = alloc_skb(wr_len, GFP_KERNEL);
cfdda9d7
SW		 134 if (!skb) {
135 ret = -ENOMEM;
136 goto err7;
137 }
138 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
139
140 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len);
141 memset(res_wr, 0, wr_len);
142 res_wr->op_nres = cpu_to_be32(
143 FW_WR_OP(FW_RI_RES_WR) |
144 V_FW_RI_RES_WR_NRES(2) |
145 FW_WR_COMPL(1));
146 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16));
c8e081a1 147 res_wr->cookie = (unsigned long) &wr_wait;
cfdda9d7
SW		 148 res = res_wr->res;
149 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ;
150 res->u.sqrq.op = FW_RI_RES_OP_WRITE;
151
152 /*
153 * eqsize is the number of 64B entries plus the status page size.
154 */
155 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + T4_EQ_STATUS_ENTRIES;
156
157 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
158 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */
159 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */
160 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */
161 V_FW_RI_RES_WR_IQID(scq->cqid));
162 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
163 V_FW_RI_RES_WR_DCAEN(0) |
164 V_FW_RI_RES_WR_DCACPU(0) |
d37ac31d 165 V_FW_RI_RES_WR_FBMIN(2) |
cfdda9d7
SW		 166 V_FW_RI_RES_WR_FBMAX(3) |
167 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
168 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
169 V_FW_RI_RES_WR_EQSIZE(eqsize));
170 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid);
171 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr);
172 res++;
173 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ;
174 res->u.sqrq.op = FW_RI_RES_OP_WRITE;
175
176 /*
177 * eqsize is the number of 64B entries plus the status page size.
178 */
179 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + T4_EQ_STATUS_ENTRIES;
180 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
181 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */
182 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */
183 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */
184 V_FW_RI_RES_WR_IQID(rcq->cqid));
185 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
186 V_FW_RI_RES_WR_DCAEN(0) |
187 V_FW_RI_RES_WR_DCACPU(0) |
d37ac31d 188 V_FW_RI_RES_WR_FBMIN(2) |
cfdda9d7
SW		 189 V_FW_RI_RES_WR_FBMAX(3) |
190 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
191 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
192 V_FW_RI_RES_WR_EQSIZE(eqsize));
193 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid);
194 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr);
195
196 c4iw_init_wr_wait(&wr_wait);
197
198 ret = c4iw_ofld_send(rdev, skb);
199 if (ret)
200 goto err7;
201 wait_event_timeout(wr_wait.wait, wr_wait.done, C4IW_WR_TO);
202 if (!wr_wait.done) {
203 printk(KERN_ERR MOD "Device %s not responding!\n",
204 pci_name(rdev->lldi.pdev));
205 rdev->flags = T4_FATAL_ERROR;
206 ret = -EIO;
207 } else
208 ret = wr_wait.ret;
209 if (ret)
210 goto err7;
211
212 PDBG("%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%llx rqudb 0x%llx\n",
213 __func__, wq->sq.qid, wq->rq.qid, wq->db,
214 (unsigned long long)wq->sq.udb, (unsigned long long)wq->rq.udb);
215
216 return 0;
217err7:
218 dma_free_coherent(&(rdev->lldi.pdev->dev),
219 wq->rq.memsize, wq->rq.queue,
f38926aa 220 dma_unmap_addr(&wq->rq, mapping));
cfdda9d7
SW		 221err6:
222 dma_free_coherent(&(rdev->lldi.pdev->dev),
223 wq->sq.memsize, wq->sq.queue,
f38926aa 224 dma_unmap_addr(&wq->sq, mapping));
cfdda9d7
SW		 225err5:
226 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
227err4:
228 kfree(wq->rq.sw_rq);
229err3:
230 kfree(wq->sq.sw_sq);
231err2:
232 c4iw_put_qpid(rdev, wq->rq.qid, uctx);
233err1:
234 c4iw_put_qpid(rdev, wq->sq.qid, uctx);
235 return -ENOMEM;
236}
237
d37ac31d
SW		 238static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp,
239 struct ib_send_wr *wr, int max, u32 *plenp)
cfdda9d7 240{
d37ac31d
SW		 241 u8 *dstp, *srcp;
242 u32 plen = 0;
cfdda9d7 243 int i;
d37ac31d
SW		 244 int rem, len;
245
246 dstp = (u8 *)immdp->data;
247 for (i = 0; i < wr->num_sge; i++) {
248 if ((plen + wr->sg_list[i].length) > max)
249 return -EMSGSIZE;
250 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr;
251 plen += wr->sg_list[i].length;
252 rem = wr->sg_list[i].length;
253 while (rem) {
254 if (dstp == (u8 *)&sq->queue[sq->size])
255 dstp = (u8 *)sq->queue;
256 if (rem <= (u8 *)&sq->queue[sq->size] - dstp)
257 len = rem;
258 else
259 len = (u8 *)&sq->queue[sq->size] - dstp;
260 memcpy(dstp, srcp, len);
261 dstp += len;
262 srcp += len;
263 rem -= len;
264 }
265 }
266 immdp->op = FW_RI_DATA_IMMD;
267 immdp->r1 = 0;
268 immdp->r2 = 0;
269 immdp->immdlen = cpu_to_be32(plen);
270 *plenp = plen;
271 return 0;
272}
273
274static int build_isgl(__be64 *queue_start, __be64 *queue_end,
275 struct fw_ri_isgl *isglp, struct ib_sge *sg_list,
276 int num_sge, u32 *plenp)
277
278{
279 int i;
280 u32 plen = 0;
281 __be64 *flitp = (__be64 *)isglp->sge;
282
283 for (i = 0; i < num_sge; i++) {
284 if ((plen + sg_list[i].length) < plen)
285 return -EMSGSIZE;
286 plen += sg_list[i].length;
287 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) |
288 sg_list[i].length);
289 if (++flitp == queue_end)
290 flitp = queue_start;
291 *flitp = cpu_to_be64(sg_list[i].addr);
292 if (++flitp == queue_end)
293 flitp = queue_start;
294 }
295 isglp->op = FW_RI_DATA_ISGL;
296 isglp->r1 = 0;
297 isglp->nsge = cpu_to_be16(num_sge);
298 isglp->r2 = 0;
299 if (plenp)
300 *plenp = plen;
301 return 0;
302}
303
304static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe,
305 struct ib_send_wr *wr, u8 *len16)
306{
cfdda9d7
SW		 307 u32 plen;
308 int size;
d37ac31d 309 int ret;
cfdda9d7
SW		 310
311 if (wr->num_sge > T4_MAX_SEND_SGE)
312 return -EINVAL;
313 switch (wr->opcode) {
314 case IB_WR_SEND:
315 if (wr->send_flags & IB_SEND_SOLICITED)
316 wqe->send.sendop_pkd = cpu_to_be32(
317 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE));
318 else
319 wqe->send.sendop_pkd = cpu_to_be32(
320 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND));
321 wqe->send.stag_inv = 0;
322 break;
323 case IB_WR_SEND_WITH_INV:
324 if (wr->send_flags & IB_SEND_SOLICITED)
325 wqe->send.sendop_pkd = cpu_to_be32(
326 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV));
327 else
328 wqe->send.sendop_pkd = cpu_to_be32(
329 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV));
330 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
331 break;
332
333 default:
334 return -EINVAL;
335 }
d37ac31d 336
cfdda9d7
SW		 337 plen = 0;
338 if (wr->num_sge) {
339 if (wr->send_flags & IB_SEND_INLINE) {
d37ac31d
SW		 340 ret = build_immd(sq, wqe->send.u.immd_src, wr,
341 T4_MAX_SEND_INLINE, &plen);
342 if (ret)
343 return ret;
cfdda9d7
SW		 344 size = sizeof wqe->send + sizeof(struct fw_ri_immd) +
345 plen;
346 } else {
d37ac31d
SW		 347 ret = build_isgl((__be64 *)sq->queue,
348 (__be64 *)&sq->queue[sq->size],
349 wqe->send.u.isgl_src,
350 wr->sg_list, wr->num_sge, &plen);
351 if (ret)
352 return ret;
cfdda9d7
SW		 353 size = sizeof wqe->send + sizeof(struct fw_ri_isgl) +
354 wr->num_sge * sizeof(struct fw_ri_sge);
355 }
356 } else {
357 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD;
358 wqe->send.u.immd_src[0].r1 = 0;
359 wqe->send.u.immd_src[0].r2 = 0;
360 wqe->send.u.immd_src[0].immdlen = 0;
361 size = sizeof wqe->send + sizeof(struct fw_ri_immd);
d37ac31d 362 plen = 0;
cfdda9d7
SW		 363 }
364 *len16 = DIV_ROUND_UP(size, 16);
365 wqe->send.plen = cpu_to_be32(plen);
366 return 0;
367}
368
d37ac31d
SW		 369static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe,
370 struct ib_send_wr *wr, u8 *len16)
cfdda9d7 371{
cfdda9d7
SW		 372 u32 plen;
373 int size;
d37ac31d 374 int ret;
cfdda9d7 375
d37ac31d 376 if (wr->num_sge > T4_MAX_SEND_SGE)
cfdda9d7
SW		 377 return -EINVAL;
378 wqe->write.r2 = 0;
379 wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
380 wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr);
cfdda9d7
SW		 381 if (wr->num_sge) {
382 if (wr->send_flags & IB_SEND_INLINE) {
d37ac31d
SW		 383 ret = build_immd(sq, wqe->write.u.immd_src, wr,
384 T4_MAX_WRITE_INLINE, &plen);
385 if (ret)
386 return ret;
cfdda9d7
SW		 387 size = sizeof wqe->write + sizeof(struct fw_ri_immd) +
388 plen;
389 } else {
d37ac31d
SW		 390 ret = build_isgl((__be64 *)sq->queue,
391 (__be64 *)&sq->queue[sq->size],
392 wqe->write.u.isgl_src,
393 wr->sg_list, wr->num_sge, &plen);
394 if (ret)
395 return ret;
cfdda9d7
SW		 396 size = sizeof wqe->write + sizeof(struct fw_ri_isgl) +
397 wr->num_sge * sizeof(struct fw_ri_sge);
398 }
399 } else {
400 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD;
401 wqe->write.u.immd_src[0].r1 = 0;
402 wqe->write.u.immd_src[0].r2 = 0;
403 wqe->write.u.immd_src[0].immdlen = 0;
404 size = sizeof wqe->write + sizeof(struct fw_ri_immd);
d37ac31d 405 plen = 0;
cfdda9d7
SW		 406 }
407 *len16 = DIV_ROUND_UP(size, 16);
408 wqe->write.plen = cpu_to_be32(plen);
409 return 0;
410}
411
412static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
413{
414 if (wr->num_sge > 1)
415 return -EINVAL;
416 if (wr->num_sge) {
417 wqe->read.stag_src = cpu_to_be32(wr->wr.rdma.rkey);
418 wqe->read.to_src_hi = cpu_to_be32((u32)(wr->wr.rdma.remote_addr
419 >> 32));
420 wqe->read.to_src_lo = cpu_to_be32((u32)wr->wr.rdma.remote_addr);
421 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey);
422 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length);
423 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr
424 >> 32));
425 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr));
426 } else {
427 wqe->read.stag_src = cpu_to_be32(2);
428 wqe->read.to_src_hi = 0;
429 wqe->read.to_src_lo = 0;
430 wqe->read.stag_sink = cpu_to_be32(2);
431 wqe->read.plen = 0;
432 wqe->read.to_sink_hi = 0;
433 wqe->read.to_sink_lo = 0;
434 }
435 wqe->read.r2 = 0;
436 wqe->read.r5 = 0;
437 *len16 = DIV_ROUND_UP(sizeof wqe->read, 16);
438 return 0;
439}
440
441static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe,
442 struct ib_recv_wr *wr, u8 *len16)
443{
d37ac31d 444 int ret;
cfdda9d7 445
d37ac31d
SW		 446 ret = build_isgl((__be64 *)qhp->wq.rq.queue,
447 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size],
448 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL);
449 if (ret)
450 return ret;
cfdda9d7
SW		 451 *len16 = DIV_ROUND_UP(sizeof wqe->recv +
452 wr->num_sge * sizeof(struct fw_ri_sge), 16);
453 return 0;
454}
455
456static int build_fastreg(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
457{
458
459 struct fw_ri_immd *imdp;
460 __be64 *p;
461 int i;
462 int pbllen = roundup(wr->wr.fast_reg.page_list_len * sizeof(u64), 32);
463
464 if (wr->wr.fast_reg.page_list_len > T4_MAX_FR_DEPTH)
465 return -EINVAL;
466
467 wqe->fr.qpbinde_to_dcacpu = 0;
468 wqe->fr.pgsz_shift = wr->wr.fast_reg.page_shift - 12;
469 wqe->fr.addr_type = FW_RI_VA_BASED_TO;
470 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->wr.fast_reg.access_flags);
471 wqe->fr.len_hi = 0;
472 wqe->fr.len_lo = cpu_to_be32(wr->wr.fast_reg.length);
473 wqe->fr.stag = cpu_to_be32(wr->wr.fast_reg.rkey);
474 wqe->fr.va_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32);
475 wqe->fr.va_lo_fbo = cpu_to_be32(wr->wr.fast_reg.iova_start &
476 0xffffffff);
477 if (pbllen > T4_MAX_FR_IMMD) {
478 struct c4iw_fr_page_list *c4pl =
479 to_c4iw_fr_page_list(wr->wr.fast_reg.page_list);
480 struct fw_ri_dsgl *sglp;
481
482 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1);
483 sglp->op = FW_RI_DATA_DSGL;
484 sglp->r1 = 0;
485 sglp->nsge = cpu_to_be16(1);
486 sglp->addr0 = cpu_to_be64(c4pl->dma_addr);
487 sglp->len0 = cpu_to_be32(pbllen);
488
489 *len16 = DIV_ROUND_UP(sizeof wqe->fr + sizeof *sglp, 16);
490 } else {
491 imdp = (struct fw_ri_immd *)(&wqe->fr + 1);
492 imdp->op = FW_RI_DATA_IMMD;
493 imdp->r1 = 0;
494 imdp->r2 = 0;
495 imdp->immdlen = cpu_to_be32(pbllen);
496 p = (__be64 *)(imdp + 1);
497 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++, p++)
498 *p = cpu_to_be64(
499 (u64)wr->wr.fast_reg.page_list->page_list[i]);
500 *len16 = DIV_ROUND_UP(sizeof wqe->fr + sizeof *imdp + pbllen,
501 16);
502 }
503 return 0;
504}
505
506static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr,
507 u8 *len16)
508{
509 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
510 wqe->inv.r2 = 0;
511 *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16);
512 return 0;
513}
514
515void c4iw_qp_add_ref(struct ib_qp *qp)
516{
517 PDBG("%s ib_qp %p\n", __func__, qp);
518 atomic_inc(&(to_c4iw_qp(qp)->refcnt));
519}
520
521void c4iw_qp_rem_ref(struct ib_qp *qp)
522{
523 PDBG("%s ib_qp %p\n", __func__, qp);
524 if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt)))
525 wake_up(&(to_c4iw_qp(qp)->wait));
526}
527
528int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
529 struct ib_send_wr **bad_wr)
530{
531 int err = 0;
532 u8 len16 = 0;
533 enum fw_wr_opcodes fw_opcode = 0;
534 enum fw_ri_wr_flags fw_flags;
535 struct c4iw_qp *qhp;
536 union t4_wr *wqe;
537 u32 num_wrs;
538 struct t4_swsqe *swsqe;
539 unsigned long flag;
540 u16 idx = 0;
541
542 qhp = to_c4iw_qp(ibqp);
543 spin_lock_irqsave(&qhp->lock, flag);
544 if (t4_wq_in_error(&qhp->wq)) {
545 spin_unlock_irqrestore(&qhp->lock, flag);
546 return -EINVAL;
547 }
548 num_wrs = t4_sq_avail(&qhp->wq);
549 if (num_wrs == 0) {
550 spin_unlock_irqrestore(&qhp->lock, flag);
551 return -ENOMEM;
552 }
553 while (wr) {
554 if (num_wrs == 0) {
555 err = -ENOMEM;
556 *bad_wr = wr;
557 break;
558 }
d37ac31d
SW		 559 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue +
560 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE);
561
cfdda9d7
SW		 562 fw_flags = 0;
563 if (wr->send_flags & IB_SEND_SOLICITED)
564 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG;
565 if (wr->send_flags & IB_SEND_SIGNALED)
566 fw_flags |= FW_RI_COMPLETION_FLAG;
567 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx];
568 switch (wr->opcode) {
569 case IB_WR_SEND_WITH_INV:
570 case IB_WR_SEND:
571 if (wr->send_flags & IB_SEND_FENCE)
572 fw_flags |= FW_RI_READ_FENCE_FLAG;
573 fw_opcode = FW_RI_SEND_WR;
574 if (wr->opcode == IB_WR_SEND)
575 swsqe->opcode = FW_RI_SEND;
576 else
577 swsqe->opcode = FW_RI_SEND_WITH_INV;
d37ac31d 578 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16);
cfdda9d7
SW		 579 break;
580 case IB_WR_RDMA_WRITE:
581 fw_opcode = FW_RI_RDMA_WRITE_WR;
582 swsqe->opcode = FW_RI_RDMA_WRITE;
d37ac31d 583 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16);
cfdda9d7
SW		 584 break;
585 case IB_WR_RDMA_READ:
2f1fb507 586 case IB_WR_RDMA_READ_WITH_INV:
cfdda9d7
SW		 587 fw_opcode = FW_RI_RDMA_READ_WR;
588 swsqe->opcode = FW_RI_READ_REQ;
2f1fb507
SW		 589 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV)
590 fw_flags |= FW_RI_RDMA_READ_INVALIDATE;
591 else
592 fw_flags = 0;
cfdda9d7
SW		 593 err = build_rdma_read(wqe, wr, &len16);
594 if (err)
595 break;
596 swsqe->read_len = wr->sg_list[0].length;
597 if (!qhp->wq.sq.oldest_read)
598 qhp->wq.sq.oldest_read = swsqe;
599 break;
600 case IB_WR_FAST_REG_MR:
601 fw_opcode = FW_RI_FR_NSMR_WR;
602 swsqe->opcode = FW_RI_FAST_REGISTER;
603 err = build_fastreg(wqe, wr, &len16);
604 break;
605 case IB_WR_LOCAL_INV:
4ab1eb9c
SW		 606 if (wr->send_flags & IB_SEND_FENCE)
607 fw_flags |= FW_RI_LOCAL_FENCE_FLAG;
cfdda9d7
SW		 608 fw_opcode = FW_RI_INV_LSTAG_WR;
609 swsqe->opcode = FW_RI_LOCAL_INV;
610 err = build_inv_stag(wqe, wr, &len16);
611 break;
612 default:
613 PDBG("%s post of type=%d TBD!\n", __func__,
614 wr->opcode);
615 err = -EINVAL;
616 }
617 if (err) {
618 *bad_wr = wr;
619 break;
620 }
621 swsqe->idx = qhp->wq.sq.pidx;
622 swsqe->complete = 0;
623 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED);
624 swsqe->wr_id = wr->wr_id;
625
626 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16);
627
628 PDBG("%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n",
629 __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx,
630 swsqe->opcode, swsqe->read_len);
631 wr = wr->next;
632 num_wrs--;
d37ac31d
SW		 633 t4_sq_produce(&qhp->wq, len16);
634 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
cfdda9d7
SW		 635 }
636 if (t4_wq_db_enabled(&qhp->wq))
637 t4_ring_sq_db(&qhp->wq, idx);
638 spin_unlock_irqrestore(&qhp->lock, flag);
639 return err;
640}
641
642int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
643 struct ib_recv_wr **bad_wr)
644{
645 int err = 0;
646 struct c4iw_qp *qhp;
647 union t4_recv_wr *wqe;
648 u32 num_wrs;
649 u8 len16 = 0;
650 unsigned long flag;
651 u16 idx = 0;
652
653 qhp = to_c4iw_qp(ibqp);
654 spin_lock_irqsave(&qhp->lock, flag);
655 if (t4_wq_in_error(&qhp->wq)) {
656 spin_unlock_irqrestore(&qhp->lock, flag);
657 return -EINVAL;
658 }
659 num_wrs = t4_rq_avail(&qhp->wq);
660 if (num_wrs == 0) {
661 spin_unlock_irqrestore(&qhp->lock, flag);
662 return -ENOMEM;
663 }
664 while (wr) {
665 if (wr->num_sge > T4_MAX_RECV_SGE) {
666 err = -EINVAL;
667 *bad_wr = wr;
668 break;
669 }
d37ac31d
SW		 670 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue +
671 qhp->wq.rq.wq_pidx *
672 T4_EQ_ENTRY_SIZE);
cfdda9d7
SW		 673 if (num_wrs)
674 err = build_rdma_recv(qhp, wqe, wr, &len16);
675 else
676 err = -ENOMEM;
677 if (err) {
678 *bad_wr = wr;
679 break;
680 }
681
682 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id;
683
684 wqe->recv.opcode = FW_RI_RECV_WR;
685 wqe->recv.r1 = 0;
686 wqe->recv.wrid = qhp->wq.rq.pidx;
687 wqe->recv.r2[0] = 0;
688 wqe->recv.r2[1] = 0;
689 wqe->recv.r2[2] = 0;
690 wqe->recv.len16 = len16;
cfdda9d7
SW		 691 PDBG("%s cookie 0x%llx pidx %u\n", __func__,
692 (unsigned long long) wr->wr_id, qhp->wq.rq.pidx);
d37ac31d
SW		 693 t4_rq_produce(&qhp->wq, len16);
694 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
cfdda9d7
SW		 695 wr = wr->next;
696 num_wrs--;
cfdda9d7
SW		 697 }
698 if (t4_wq_db_enabled(&qhp->wq))
699 t4_ring_rq_db(&qhp->wq, idx);
700 spin_unlock_irqrestore(&qhp->lock, flag);
701 return err;
702}
703
704int c4iw_bind_mw(struct ib_qp *qp, struct ib_mw *mw, struct ib_mw_bind *mw_bind)
705{
706 return -ENOSYS;
707}
708
709static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type,
710 u8 *ecode)
711{
712 int status;
713 int tagged;
714 int opcode;
715 int rqtype;
716 int send_inv;
717
718 if (!err_cqe) {
719 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
720 *ecode = 0;
721 return;
722 }
723
724 status = CQE_STATUS(err_cqe);
725 opcode = CQE_OPCODE(err_cqe);
726 rqtype = RQ_TYPE(err_cqe);
727 send_inv = (opcode == FW_RI_SEND_WITH_INV) ||
728 (opcode == FW_RI_SEND_WITH_SE_INV);
729 tagged = (opcode == FW_RI_RDMA_WRITE) ||
730 (rqtype && (opcode == FW_RI_READ_RESP));
731
732 switch (status) {
733 case T4_ERR_STAG:
734 if (send_inv) {
735 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
736 *ecode = RDMAP_CANT_INV_STAG;
737 } else {
738 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
739 *ecode = RDMAP_INV_STAG;
740 }
741 break;
742 case T4_ERR_PDID:
743 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
744 if ((opcode == FW_RI_SEND_WITH_INV) ||
745 (opcode == FW_RI_SEND_WITH_SE_INV))
746 *ecode = RDMAP_CANT_INV_STAG;
747 else
748 *ecode = RDMAP_STAG_NOT_ASSOC;
749 break;
750 case T4_ERR_QPID:
751 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
752 *ecode = RDMAP_STAG_NOT_ASSOC;
753 break;
754 case T4_ERR_ACCESS:
755 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
756 *ecode = RDMAP_ACC_VIOL;
757 break;
758 case T4_ERR_WRAP:
759 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
760 *ecode = RDMAP_TO_WRAP;
761 break;
762 case T4_ERR_BOUND:
763 if (tagged) {
764 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
765 *ecode = DDPT_BASE_BOUNDS;
766 } else {
767 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
768 *ecode = RDMAP_BASE_BOUNDS;
769 }
770 break;
771 case T4_ERR_INVALIDATE_SHARED_MR:
772 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
773 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
774 *ecode = RDMAP_CANT_INV_STAG;
775 break;
776 case T4_ERR_ECC:
777 case T4_ERR_ECC_PSTAG:
778 case T4_ERR_INTERNAL_ERR:
779 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
780 *ecode = 0;
781 break;
782 case T4_ERR_OUT_OF_RQE:
783 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
784 *ecode = DDPU_INV_MSN_NOBUF;
785 break;
786 case T4_ERR_PBL_ADDR_BOUND:
787 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
788 *ecode = DDPT_BASE_BOUNDS;
789 break;
790 case T4_ERR_CRC:
791 *layer_type = LAYER_MPA|DDP_LLP;
792 *ecode = MPA_CRC_ERR;
793 break;
794 case T4_ERR_MARKER:
795 *layer_type = LAYER_MPA|DDP_LLP;
796 *ecode = MPA_MARKER_ERR;
797 break;
798 case T4_ERR_PDU_LEN_ERR:
799 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
800 *ecode = DDPU_MSG_TOOBIG;
801 break;
802 case T4_ERR_DDP_VERSION:
803 if (tagged) {
804 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
805 *ecode = DDPT_INV_VERS;
806 } else {
807 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
808 *ecode = DDPU_INV_VERS;
809 }
810 break;
811 case T4_ERR_RDMA_VERSION:
812 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
813 *ecode = RDMAP_INV_VERS;
814 break;
815 case T4_ERR_OPCODE:
816 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
817 *ecode = RDMAP_INV_OPCODE;
818 break;
819 case T4_ERR_DDP_QUEUE_NUM:
820 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
821 *ecode = DDPU_INV_QN;
822 break;
823 case T4_ERR_MSN:
824 case T4_ERR_MSN_GAP:
825 case T4_ERR_MSN_RANGE:
826 case T4_ERR_IRD_OVERFLOW:
827 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
828 *ecode = DDPU_INV_MSN_RANGE;
829 break;
830 case T4_ERR_TBIT:
831 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
832 *ecode = 0;
833 break;
834 case T4_ERR_MO:
835 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
836 *ecode = DDPU_INV_MO;
837 break;
838 default:
839 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
840 *ecode = 0;
841 break;
842 }
843}
844
845int c4iw_post_zb_read(struct c4iw_qp *qhp)
846{
847 union t4_wr *wqe;
848 struct sk_buff *skb;
849 u8 len16;
850
851 PDBG("%s enter\n", __func__);
852 skb = alloc_skb(40, GFP_KERNEL);
853 if (!skb) {
854 printk(KERN_ERR "%s cannot send zb_read!!\n", __func__);
855 return -ENOMEM;
856 }
857 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
858
859 wqe = (union t4_wr *)skb_put(skb, sizeof wqe->read);
860 memset(wqe, 0, sizeof wqe->read);
861 wqe->read.r2 = cpu_to_be64(0);
862 wqe->read.stag_sink = cpu_to_be32(1);
863 wqe->read.to_sink_hi = cpu_to_be32(0);
864 wqe->read.to_sink_lo = cpu_to_be32(1);
865 wqe->read.stag_src = cpu_to_be32(1);
866 wqe->read.plen = cpu_to_be32(0);
867 wqe->read.to_src_hi = cpu_to_be32(0);
868 wqe->read.to_src_lo = cpu_to_be32(1);
869 len16 = DIV_ROUND_UP(sizeof wqe->read, 16);
870 init_wr_hdr(wqe, 0, FW_RI_RDMA_READ_WR, FW_RI_COMPLETION_FLAG, len16);
871
872 return c4iw_ofld_send(&qhp->rhp->rdev, skb);
873}
874
be4c9bad
RD		 875static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe,
876 gfp_t gfp)
cfdda9d7
SW		 877{
878 struct fw_ri_wr *wqe;
879 struct sk_buff *skb;
880 struct terminate_message *term;
881
882 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
883 qhp->ep->hwtid);
884
be4c9bad 885 skb = alloc_skb(sizeof *wqe, gfp);
cfdda9d7 886 if (!skb)
be4c9bad 887 return;
cfdda9d7
SW		 888 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
889
890 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
891 memset(wqe, 0, sizeof *wqe);
892 wqe->op_compl = cpu_to_be32(FW_WR_OP(FW_RI_INIT_WR));
893 wqe->flowid_len16 = cpu_to_be32(
894 FW_WR_FLOWID(qhp->ep->hwtid) |
895 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
896
897 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE;
898 wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term);
899 term = (struct terminate_message *)wqe->u.terminate.termmsg;
900 build_term_codes(err_cqe, &term->layer_etype, &term->ecode);
be4c9bad 901 c4iw_ofld_send(&qhp->rhp->rdev, skb);
cfdda9d7
SW		 902}
903
904/*
905 * Assumes qhp lock is held.
906 */
907static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
908 struct c4iw_cq *schp, unsigned long *flag)
909{
910 int count;
911 int flushed;
912
913 PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
914 /* take a ref on the qhp since we must release the lock */
915 atomic_inc(&qhp->refcnt);
916 spin_unlock_irqrestore(&qhp->lock, *flag);
917
732bee7a 918 /* locking hierarchy: cq lock first, then qp lock. */
cfdda9d7
SW		 919 spin_lock_irqsave(&rchp->lock, *flag);
920 spin_lock(&qhp->lock);
921 c4iw_flush_hw_cq(&rchp->cq);
922 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
923 flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
924 spin_unlock(&qhp->lock);
925 spin_unlock_irqrestore(&rchp->lock, *flag);
926 if (flushed)
927 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
928
732bee7a 929 /* locking hierarchy: cq lock first, then qp lock. */
cfdda9d7
SW		 930 spin_lock_irqsave(&schp->lock, *flag);
931 spin_lock(&qhp->lock);
932 c4iw_flush_hw_cq(&schp->cq);
933 c4iw_count_scqes(&schp->cq, &qhp->wq, &count);
934 flushed = c4iw_flush_sq(&qhp->wq, &schp->cq, count);
935 spin_unlock(&qhp->lock);
936 spin_unlock_irqrestore(&schp->lock, *flag);
937 if (flushed)
938 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
939
940 /* deref */
941 if (atomic_dec_and_test(&qhp->refcnt))
942 wake_up(&qhp->wait);
943
944 spin_lock_irqsave(&qhp->lock, *flag);
945}
946
947static void flush_qp(struct c4iw_qp *qhp, unsigned long *flag)
948{
949 struct c4iw_cq *rchp, *schp;
950
951 rchp = get_chp(qhp->rhp, qhp->attr.rcq);
952 schp = get_chp(qhp->rhp, qhp->attr.scq);
953
954 if (qhp->ibqp.uobject) {
955 t4_set_wq_in_error(&qhp->wq);
956 t4_set_cq_in_error(&rchp->cq);
957 if (schp != rchp)
958 t4_set_cq_in_error(&schp->cq);
959 return;
960 }
961 __flush_qp(qhp, rchp, schp, flag);
962}
963
73d6fcad
SW		 964static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
965 struct c4iw_ep *ep)
cfdda9d7
SW		 966{
967 struct fw_ri_wr *wqe;
968 int ret;
969 struct c4iw_wr_wait wr_wait;
970 struct sk_buff *skb;
971
972 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
73d6fcad 973 ep->hwtid);
cfdda9d7 974
d3c814e8 975 skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
cfdda9d7
SW		 976 if (!skb)
977 return -ENOMEM;
73d6fcad 978 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
cfdda9d7
SW		 979
980 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
981 memset(wqe, 0, sizeof *wqe);
982 wqe->op_compl = cpu_to_be32(
983 FW_WR_OP(FW_RI_INIT_WR) |
984 FW_WR_COMPL(1));
985 wqe->flowid_len16 = cpu_to_be32(
73d6fcad 986 FW_WR_FLOWID(ep->hwtid) |
cfdda9d7 987 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
c8e081a1 988 wqe->cookie = (unsigned long) &wr_wait;
cfdda9d7
SW		 989
990 wqe->u.fini.type = FW_RI_TYPE_FINI;
991 c4iw_init_wr_wait(&wr_wait);
992 ret = c4iw_ofld_send(&rhp->rdev, skb);
993 if (ret)
994 goto out;
995
996 wait_event_timeout(wr_wait.wait, wr_wait.done, C4IW_WR_TO);
997 if (!wr_wait.done) {
998 printk(KERN_ERR MOD "Device %s not responding!\n",
999 pci_name(rhp->rdev.lldi.pdev));
1000 rhp->rdev.flags = T4_FATAL_ERROR;
1001 ret = -EIO;
1002 } else {
1003 ret = wr_wait.ret;
1004 if (ret)
1005 printk(KERN_WARNING MOD
1006 "%s: Abnormal close qpid %d ret %u\n",
1007 pci_name(rhp->rdev.lldi.pdev), qhp->wq.sq.qid,
1008 ret);
1009 }
1010out:
1011 PDBG("%s ret %d\n", __func__, ret);
1012 return ret;
1013}
1014
1015static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init)
1016{
1017 memset(&init->u, 0, sizeof init->u);
1018 switch (p2p_type) {
1019 case FW_RI_INIT_P2PTYPE_RDMA_WRITE:
1020 init->u.write.opcode = FW_RI_RDMA_WRITE_WR;
1021 init->u.write.stag_sink = cpu_to_be32(1);
1022 init->u.write.to_sink = cpu_to_be64(1);
1023 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD;
1024 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write +
1025 sizeof(struct fw_ri_immd),
1026 16);
1027 break;
1028 case FW_RI_INIT_P2PTYPE_READ_REQ:
1029 init->u.write.opcode = FW_RI_RDMA_READ_WR;
1030 init->u.read.stag_src = cpu_to_be32(1);
1031 init->u.read.to_src_lo = cpu_to_be32(1);
1032 init->u.read.stag_sink = cpu_to_be32(1);
1033 init->u.read.to_sink_lo = cpu_to_be32(1);
1034 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16);
1035 break;
1036 }
1037}
1038
1039static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp)
1040{
1041 struct fw_ri_wr *wqe;
1042 int ret;
1043 struct c4iw_wr_wait wr_wait;
1044 struct sk_buff *skb;
1045
1046 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
1047 qhp->ep->hwtid);
1048
d3c814e8 1049 skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
cfdda9d7
SW		 1050 if (!skb)
1051 return -ENOMEM;
1052 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
1053
1054 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
1055 memset(wqe, 0, sizeof *wqe);
1056 wqe->op_compl = cpu_to_be32(
1057 FW_WR_OP(FW_RI_INIT_WR) |
1058 FW_WR_COMPL(1));
1059 wqe->flowid_len16 = cpu_to_be32(
1060 FW_WR_FLOWID(qhp->ep->hwtid) |
1061 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1062
c8e081a1 1063 wqe->cookie = (unsigned long) &wr_wait;
cfdda9d7
SW		 1064
1065 wqe->u.init.type = FW_RI_TYPE_INIT;
1066 wqe->u.init.mpareqbit_p2ptype =
1067 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) |
1068 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type);
1069 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE;
1070 if (qhp->attr.mpa_attr.recv_marker_enabled)
1071 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE;
1072 if (qhp->attr.mpa_attr.xmit_marker_enabled)
1073 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE;
1074 if (qhp->attr.mpa_attr.crc_enabled)
1075 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE;
1076
1077 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE |
1078 FW_RI_QP_RDMA_WRITE_ENABLE |
1079 FW_RI_QP_BIND_ENABLE;
1080 if (!qhp->ibqp.uobject)
1081 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE |
1082 FW_RI_QP_STAG0_ENABLE;
1083 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq));
1084 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd);
1085 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid);
1086 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid);
1087 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid);
1088 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq);
1089 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq);
1090 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord);
1091 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird);
1092 wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq);
1093 wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq);
1094 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size);
1095 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr -
1096 rhp->rdev.lldi.vr->rq.start);
1097 if (qhp->attr.mpa_attr.initiator)
1098 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init);
1099
1100 c4iw_init_wr_wait(&wr_wait);
1101 ret = c4iw_ofld_send(&rhp->rdev, skb);
1102 if (ret)
1103 goto out;
1104
1105 wait_event_timeout(wr_wait.wait, wr_wait.done, C4IW_WR_TO);
1106 if (!wr_wait.done) {
1107 printk(KERN_ERR MOD "Device %s not responding!\n",
1108 pci_name(rhp->rdev.lldi.pdev));
1109 rhp->rdev.flags = T4_FATAL_ERROR;
1110 ret = -EIO;
1111 } else
1112 ret = wr_wait.ret;
1113out:
1114 PDBG("%s ret %d\n", __func__, ret);
1115 return ret;
1116}
1117
1118int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
1119 enum c4iw_qp_attr_mask mask,
1120 struct c4iw_qp_attributes *attrs,
1121 int internal)
1122{
1123 int ret = 0;
1124 struct c4iw_qp_attributes newattr = qhp->attr;
1125 unsigned long flag;
1126 int disconnect = 0;
1127 int terminate = 0;
1128 int abort = 0;
1129 int free = 0;
1130 struct c4iw_ep *ep = NULL;
1131
1132 PDBG("%s qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", __func__,
1133 qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state,
1134 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
1135
1136 spin_lock_irqsave(&qhp->lock, flag);
1137
1138 /* Process attr changes if in IDLE */
1139 if (mask & C4IW_QP_ATTR_VALID_MODIFY) {
1140 if (qhp->attr.state != C4IW_QP_STATE_IDLE) {
1141 ret = -EIO;
1142 goto out;
1143 }
1144 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ)
1145 newattr.enable_rdma_read = attrs->enable_rdma_read;
1146 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE)
1147 newattr.enable_rdma_write = attrs->enable_rdma_write;
1148 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND)
1149 newattr.enable_bind = attrs->enable_bind;
1150 if (mask & C4IW_QP_ATTR_MAX_ORD) {
be4c9bad 1151 if (attrs->max_ord > c4iw_max_read_depth) {
cfdda9d7
SW		 1152 ret = -EINVAL;
1153 goto out;
1154 }
1155 newattr.max_ord = attrs->max_ord;
1156 }
1157 if (mask & C4IW_QP_ATTR_MAX_IRD) {
be4c9bad 1158 if (attrs->max_ird > c4iw_max_read_depth) {
cfdda9d7
SW		 1159 ret = -EINVAL;
1160 goto out;
1161 }
1162 newattr.max_ird = attrs->max_ird;
1163 }
1164 qhp->attr = newattr;
1165 }
1166
1167 if (!(mask & C4IW_QP_ATTR_NEXT_STATE))
1168 goto out;
1169 if (qhp->attr.state == attrs->next_state)
1170 goto out;
1171
1172 switch (qhp->attr.state) {
1173 case C4IW_QP_STATE_IDLE:
1174 switch (attrs->next_state) {
1175 case C4IW_QP_STATE_RTS:
1176 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) {
1177 ret = -EINVAL;
1178 goto out;
1179 }
1180 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) {
1181 ret = -EINVAL;
1182 goto out;
1183 }
1184 qhp->attr.mpa_attr = attrs->mpa_attr;
1185 qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
1186 qhp->ep = qhp->attr.llp_stream_handle;
1187 qhp->attr.state = C4IW_QP_STATE_RTS;
1188
1189 /*
1190 * Ref the endpoint here and deref when we
1191 * disassociate the endpoint from the QP. This
1192 * happens in CLOSING->IDLE transition or *->ERROR
1193 * transition.
1194 */
1195 c4iw_get_ep(&qhp->ep->com);
1196 spin_unlock_irqrestore(&qhp->lock, flag);
1197 ret = rdma_init(rhp, qhp);
1198 spin_lock_irqsave(&qhp->lock, flag);
1199 if (ret)
1200 goto err;
1201 break;
1202 case C4IW_QP_STATE_ERROR:
1203 qhp->attr.state = C4IW_QP_STATE_ERROR;
1204 flush_qp(qhp, &flag);
1205 break;
1206 default:
1207 ret = -EINVAL;
1208 goto out;
1209 }
1210 break;
1211 case C4IW_QP_STATE_RTS:
1212 switch (attrs->next_state) {
1213 case C4IW_QP_STATE_CLOSING:
1214 BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
1215 qhp->attr.state = C4IW_QP_STATE_CLOSING;
73d6fcad 1216 ep = qhp->ep;
cfdda9d7
SW		 1217 if (!internal) {
1218 abort = 0;
1219 disconnect = 1;
cfdda9d7
SW		 1220 c4iw_get_ep(&ep->com);
1221 }
1222 spin_unlock_irqrestore(&qhp->lock, flag);
73d6fcad 1223 ret = rdma_fini(rhp, qhp, ep);
cfdda9d7
SW		 1224 spin_lock_irqsave(&qhp->lock, flag);
1225 if (ret) {
cfdda9d7
SW		 1226 c4iw_get_ep(&ep->com);
1227 disconnect = abort = 1;
1228 goto err;
1229 }
1230 break;
1231 case C4IW_QP_STATE_TERMINATE:
1232 qhp->attr.state = C4IW_QP_STATE_TERMINATE;
1233 if (qhp->ibqp.uobject)
1234 t4_set_wq_in_error(&qhp->wq);
be4c9bad
RD		 1235 ep = qhp->ep;
1236 c4iw_get_ep(&ep->com);
1237 terminate = 1;
1238 disconnect = 1;
cfdda9d7
SW		 1239 break;
1240 case C4IW_QP_STATE_ERROR:
1241 qhp->attr.state = C4IW_QP_STATE_ERROR;
1242 if (!internal) {
1243 abort = 1;
1244 disconnect = 1;
1245 ep = qhp->ep;
1246 c4iw_get_ep(&ep->com);
1247 }
1248 goto err;
1249 break;
1250 default:
1251 ret = -EINVAL;
1252 goto out;
1253 }
1254 break;
1255 case C4IW_QP_STATE_CLOSING:
1256 if (!internal) {
1257 ret = -EINVAL;
1258 goto out;
1259 }
1260 switch (attrs->next_state) {
1261 case C4IW_QP_STATE_IDLE:
1262 flush_qp(qhp, &flag);
1263 qhp->attr.state = C4IW_QP_STATE_IDLE;
1264 qhp->attr.llp_stream_handle = NULL;
1265 c4iw_put_ep(&qhp->ep->com);
1266 qhp->ep = NULL;
1267 wake_up(&qhp->wait);
1268 break;
1269 case C4IW_QP_STATE_ERROR:
1270 goto err;
1271 default:
1272 ret = -EINVAL;
1273 goto err;
1274 }
1275 break;
1276 case C4IW_QP_STATE_ERROR:
1277 if (attrs->next_state != C4IW_QP_STATE_IDLE) {
1278 ret = -EINVAL;
1279 goto out;
1280 }
1281 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) {
1282 ret = -EINVAL;
1283 goto out;
1284 }
1285 qhp->attr.state = C4IW_QP_STATE_IDLE;
1286 break;
1287 case C4IW_QP_STATE_TERMINATE:
1288 if (!internal) {
1289 ret = -EINVAL;
1290 goto out;
1291 }
1292 goto err;
1293 break;
1294 default:
1295 printk(KERN_ERR "%s in a bad state %d\n",
1296 __func__, qhp->attr.state);
1297 ret = -EINVAL;
1298 goto err;
1299 break;
1300 }
1301 goto out;
1302err:
1303 PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
1304 qhp->wq.sq.qid);
1305
1306 /* disassociate the LLP connection */
1307 qhp->attr.llp_stream_handle = NULL;
af93fb5d
SW		 1308 if (!ep)
1309 ep = qhp->ep;
cfdda9d7
SW		 1310 qhp->ep = NULL;
1311 qhp->attr.state = C4IW_QP_STATE_ERROR;
1312 free = 1;
1313 wake_up(&qhp->wait);
1314 BUG_ON(!ep);
1315 flush_qp(qhp, &flag);
1316out:
1317 spin_unlock_irqrestore(&qhp->lock, flag);
1318
1319 if (terminate)
be4c9bad 1320 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL);
cfdda9d7
SW		 1321
1322 /*
1323 * If disconnect is 1, then we need to initiate a disconnect
1324 * on the EP. This can be a normal close (RTS->CLOSING) or
1325 * an abnormal close (RTS/CLOSING->ERROR).
1326 */
1327 if (disconnect) {
be4c9bad
RD		 1328 c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC :
1329 GFP_KERNEL);
cfdda9d7
SW		 1330 c4iw_put_ep(&ep->com);
1331 }
1332
1333 /*
1334 * If free is 1, then we've disassociated the EP from the QP
1335 * and we need to dereference the EP.
1336 */
1337 if (free)
1338 c4iw_put_ep(&ep->com);
1339
1340 PDBG("%s exit state %d\n", __func__, qhp->attr.state);
1341 return ret;
1342}
1343
1344int c4iw_destroy_qp(struct ib_qp *ib_qp)
1345{
1346 struct c4iw_dev *rhp;
1347 struct c4iw_qp *qhp;
1348 struct c4iw_qp_attributes attrs;
1349 struct c4iw_ucontext *ucontext;
1350
1351 qhp = to_c4iw_qp(ib_qp);
1352 rhp = qhp->rhp;
1353
1354 attrs.next_state = C4IW_QP_STATE_ERROR;
1355 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1356 wait_event(qhp->wait, !qhp->ep);
1357
1358 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
cfdda9d7
SW		 1359 atomic_dec(&qhp->refcnt);
1360 wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
1361
1362 ucontext = ib_qp->uobject ?
1363 to_c4iw_ucontext(ib_qp->uobject->context) : NULL;
1364 destroy_qp(&rhp->rdev, &qhp->wq,
1365 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1366
1367 PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid);
1368 kfree(qhp);
1369 return 0;
1370}
1371
1372struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
1373 struct ib_udata *udata)
1374{
1375 struct c4iw_dev *rhp;
1376 struct c4iw_qp *qhp;
1377 struct c4iw_pd *php;
1378 struct c4iw_cq *schp;
1379 struct c4iw_cq *rchp;
1380 struct c4iw_create_qp_resp uresp;
1381 int sqsize, rqsize;
1382 struct c4iw_ucontext *ucontext;
1383 int ret;
1384 struct c4iw_mm_entry *mm1, *mm2, *mm3, *mm4;
1385
1386 PDBG("%s ib_pd %p\n", __func__, pd);
1387
1388 if (attrs->qp_type != IB_QPT_RC)
1389 return ERR_PTR(-EINVAL);
1390
1391 php = to_c4iw_pd(pd);
1392 rhp = php->rhp;
1393 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid);
1394 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid);
1395 if (!schp || !rchp)
1396 return ERR_PTR(-EINVAL);
1397
1398 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE)
1399 return ERR_PTR(-EINVAL);
1400
1401 rqsize = roundup(attrs->cap.max_recv_wr + 1, 16);
1402 if (rqsize > T4_MAX_RQ_SIZE)
1403 return ERR_PTR(-E2BIG);
1404
1405 sqsize = roundup(attrs->cap.max_send_wr + 1, 16);
1406 if (sqsize > T4_MAX_SQ_SIZE)
1407 return ERR_PTR(-E2BIG);
1408
1409 ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL;
1410
1411
1412 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
1413 if (!qhp)
1414 return ERR_PTR(-ENOMEM);
1415 qhp->wq.sq.size = sqsize;
1416 qhp->wq.sq.memsize = (sqsize + 1) * sizeof *qhp->wq.sq.queue;
1417 qhp->wq.rq.size = rqsize;
1418 qhp->wq.rq.memsize = (rqsize + 1) * sizeof *qhp->wq.rq.queue;
1419
1420 if (ucontext) {
1421 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE);
1422 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE);
1423 }
1424
1425 PDBG("%s sqsize %u sqmemsize %zu rqsize %u rqmemsize %zu\n",
1426 __func__, sqsize, qhp->wq.sq.memsize, rqsize, qhp->wq.rq.memsize);
1427
1428 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq,
1429 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1430 if (ret)
1431 goto err1;
1432
1433 attrs->cap.max_recv_wr = rqsize - 1;
1434 attrs->cap.max_send_wr = sqsize - 1;
1435 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE;
1436
1437 qhp->rhp = rhp;
1438 qhp->attr.pd = php->pdid;
1439 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid;
1440 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid;
1441 qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
1442 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
1443 qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
1444 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
1445 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
1446 qhp->attr.state = C4IW_QP_STATE_IDLE;
1447 qhp->attr.next_state = C4IW_QP_STATE_IDLE;
1448 qhp->attr.enable_rdma_read = 1;
1449 qhp->attr.enable_rdma_write = 1;
1450 qhp->attr.enable_bind = 1;
1451 qhp->attr.max_ord = 1;
1452 qhp->attr.max_ird = 1;
1453 spin_lock_init(&qhp->lock);
1454 init_waitqueue_head(&qhp->wait);
1455 atomic_set(&qhp->refcnt, 1);
1456
1457 ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid);
1458 if (ret)
1459 goto err2;
1460
cfdda9d7
SW		 1461 if (udata) {
1462 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
1463 if (!mm1) {
1464 ret = -ENOMEM;
30a6a62f 1465 goto err3;
cfdda9d7
SW		 1466 }
1467 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
1468 if (!mm2) {
1469 ret = -ENOMEM;
30a6a62f 1470 goto err4;
cfdda9d7
SW		 1471 }
1472 mm3 = kmalloc(sizeof *mm3, GFP_KERNEL);
1473 if (!mm3) {
1474 ret = -ENOMEM;
30a6a62f 1475 goto err5;
cfdda9d7
SW		 1476 }
1477 mm4 = kmalloc(sizeof *mm4, GFP_KERNEL);
1478 if (!mm4) {
1479 ret = -ENOMEM;
30a6a62f 1480 goto err6;
cfdda9d7
SW		 1481 }
1482
1483 uresp.qid_mask = rhp->rdev.qpmask;
1484 uresp.sqid = qhp->wq.sq.qid;
1485 uresp.sq_size = qhp->wq.sq.size;
1486 uresp.sq_memsize = qhp->wq.sq.memsize;
1487 uresp.rqid = qhp->wq.rq.qid;
1488 uresp.rq_size = qhp->wq.rq.size;
1489 uresp.rq_memsize = qhp->wq.rq.memsize;
1490 spin_lock(&ucontext->mmap_lock);
1491 uresp.sq_key = ucontext->key;
1492 ucontext->key += PAGE_SIZE;
1493 uresp.rq_key = ucontext->key;
1494 ucontext->key += PAGE_SIZE;
1495 uresp.sq_db_gts_key = ucontext->key;
1496 ucontext->key += PAGE_SIZE;
1497 uresp.rq_db_gts_key = ucontext->key;
1498 ucontext->key += PAGE_SIZE;
1499 spin_unlock(&ucontext->mmap_lock);
1500 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp);
1501 if (ret)
30a6a62f 1502 goto err7;
cfdda9d7
SW		 1503 mm1->key = uresp.sq_key;
1504 mm1->addr = virt_to_phys(qhp->wq.sq.queue);
1505 mm1->len = PAGE_ALIGN(qhp->wq.sq.memsize);
1506 insert_mmap(ucontext, mm1);
1507 mm2->key = uresp.rq_key;
1508 mm2->addr = virt_to_phys(qhp->wq.rq.queue);
1509 mm2->len = PAGE_ALIGN(qhp->wq.rq.memsize);
1510 insert_mmap(ucontext, mm2);
1511 mm3->key = uresp.sq_db_gts_key;
1512 mm3->addr = qhp->wq.sq.udb;
1513 mm3->len = PAGE_SIZE;
1514 insert_mmap(ucontext, mm3);
1515 mm4->key = uresp.rq_db_gts_key;
1516 mm4->addr = qhp->wq.rq.udb;
1517 mm4->len = PAGE_SIZE;
1518 insert_mmap(ucontext, mm4);
1519 }
1520 qhp->ibqp.qp_num = qhp->wq.sq.qid;
1521 init_timer(&(qhp->timer));
1522 PDBG("%s qhp %p sq_num_entries %d, rq_num_entries %d qpid 0x%0x\n",
1523 __func__, qhp, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
1524 qhp->wq.sq.qid);
1525 return &qhp->ibqp;
cfdda9d7 1526err7:
30a6a62f 1527 kfree(mm4);
cfdda9d7 1528err6:
30a6a62f 1529 kfree(mm3);
cfdda9d7 1530err5:
30a6a62f 1531 kfree(mm2);
cfdda9d7 1532err4:
30a6a62f 1533 kfree(mm1);
cfdda9d7
SW		 1534err3:
1535 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1536err2:
1537 destroy_qp(&rhp->rdev, &qhp->wq,
1538 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1539err1:
1540 kfree(qhp);
1541 return ERR_PTR(ret);
1542}
1543
1544int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1545 int attr_mask, struct ib_udata *udata)
1546{
1547 struct c4iw_dev *rhp;
1548 struct c4iw_qp *qhp;
1549 enum c4iw_qp_attr_mask mask = 0;
1550 struct c4iw_qp_attributes attrs;
1551
1552 PDBG("%s ib_qp %p\n", __func__, ibqp);
1553
1554 /* iwarp does not support the RTR state */
1555 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
1556 attr_mask &= ~IB_QP_STATE;
1557
1558 /* Make sure we still have something left to do */
1559 if (!attr_mask)
1560 return 0;
1561
1562 memset(&attrs, 0, sizeof attrs);
1563 qhp = to_c4iw_qp(ibqp);
1564 rhp = qhp->rhp;
1565
1566 attrs.next_state = c4iw_convert_state(attr->qp_state);
1567 attrs.enable_rdma_read = (attr->qp_access_flags &
1568 IB_ACCESS_REMOTE_READ) ? 1 : 0;
1569 attrs.enable_rdma_write = (attr->qp_access_flags &
1570 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
1571 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
1572
1573
1574 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0;
1575 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
1576 (C4IW_QP_ATTR_ENABLE_RDMA_READ |
1577 C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
1578 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0;
1579
1580 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0);
1581}
1582
1583struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn)
1584{
1585 PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn);
1586 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn);
1587}
Linux 6.x block layer and io_uring tree(s)