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RDMA/cxgb4: Remove kfifo usage
[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 */
e4dd23d7
PG		 32
33#include <linux/module.h>
34
cfdda9d7
SW		 35#include "iw_cxgb4.h"
36
2c974781
VP		 37static int db_delay_usecs = 1;
38module_param(db_delay_usecs, int, 0644);
39MODULE_PARM_DESC(db_delay_usecs, "Usecs to delay awaiting db fifo to drain");
40
a9c77198 41static int ocqp_support = 1;
c6d7b267 42module_param(ocqp_support, int, 0644);
a9c77198 43MODULE_PARM_DESC(ocqp_support, "Support on-chip SQs (default=1)");
c6d7b267 44
422eea0a
VP		 45int db_fc_threshold = 2000;
46module_param(db_fc_threshold, int, 0644);
47MODULE_PARM_DESC(db_fc_threshold, "QP count/threshold that triggers automatic "
48 "db flow control mode (default = 2000)");
49
2f5b48c3
SW		 50static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state)
51{
52 unsigned long flag;
53 spin_lock_irqsave(&qhp->lock, flag);
54 qhp->attr.state = state;
55 spin_unlock_irqrestore(&qhp->lock, flag);
56}
57
c6d7b267
SW		 58static void dealloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
59{
60 c4iw_ocqp_pool_free(rdev, sq->dma_addr, sq->memsize);
61}
62
63static void dealloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
64{
65 dma_free_coherent(&(rdev->lldi.pdev->dev), sq->memsize, sq->queue,
66 pci_unmap_addr(sq, mapping));
67}
68
69static void dealloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
70{
71 if (t4_sq_onchip(sq))
72 dealloc_oc_sq(rdev, sq);
73 else
74 dealloc_host_sq(rdev, sq);
75}
76
77static int alloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
78{
79 if (!ocqp_support || !t4_ocqp_supported())
80 return -ENOSYS;
81 sq->dma_addr = c4iw_ocqp_pool_alloc(rdev, sq->memsize);
82 if (!sq->dma_addr)
83 return -ENOMEM;
84 sq->phys_addr = rdev->oc_mw_pa + sq->dma_addr -
85 rdev->lldi.vr->ocq.start;
86 sq->queue = (__force union t4_wr *)(rdev->oc_mw_kva + sq->dma_addr -
87 rdev->lldi.vr->ocq.start);
88 sq->flags |= T4_SQ_ONCHIP;
89 return 0;
90}
91
92static int alloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq)
93{
94 sq->queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), sq->memsize,
95 &(sq->dma_addr), GFP_KERNEL);
96 if (!sq->queue)
97 return -ENOMEM;
98 sq->phys_addr = virt_to_phys(sq->queue);
99 pci_unmap_addr_set(sq, mapping, sq->dma_addr);
100 return 0;
101}
102
cfdda9d7
SW		 103static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
104 struct c4iw_dev_ucontext *uctx)
105{
106 /*
107 * uP clears EQ contexts when the connection exits rdma mode,
108 * so no need to post a RESET WR for these EQs.
109 */
110 dma_free_coherent(&(rdev->lldi.pdev->dev),
111 wq->rq.memsize, wq->rq.queue,
f38926aa 112 dma_unmap_addr(&wq->rq, mapping));
c6d7b267 113 dealloc_sq(rdev, &wq->sq);
cfdda9d7
SW		 114 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
115 kfree(wq->rq.sw_rq);
116 kfree(wq->sq.sw_sq);
117 c4iw_put_qpid(rdev, wq->rq.qid, uctx);
118 c4iw_put_qpid(rdev, wq->sq.qid, uctx);
119 return 0;
120}
121
122static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
123 struct t4_cq *rcq, struct t4_cq *scq,
124 struct c4iw_dev_ucontext *uctx)
125{
126 int user = (uctx != &rdev->uctx);
127 struct fw_ri_res_wr *res_wr;
128 struct fw_ri_res *res;
129 int wr_len;
130 struct c4iw_wr_wait wr_wait;
131 struct sk_buff *skb;
132 int ret;
133 int eqsize;
134
135 wq->sq.qid = c4iw_get_qpid(rdev, uctx);
136 if (!wq->sq.qid)
137 return -ENOMEM;
138
139 wq->rq.qid = c4iw_get_qpid(rdev, uctx);
140 if (!wq->rq.qid)
141 goto err1;
142
143 if (!user) {
144 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq,
145 GFP_KERNEL);
146 if (!wq->sq.sw_sq)
147 goto err2;
148
149 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq,
150 GFP_KERNEL);
151 if (!wq->rq.sw_rq)
152 goto err3;
153 }
154
155 /*
156 * RQT must be a power of 2.
157 */
158 wq->rq.rqt_size = roundup_pow_of_two(wq->rq.size);
159 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size);
160 if (!wq->rq.rqt_hwaddr)
161 goto err4;
162
c6d7b267
SW		 163 if (user) {
164 if (alloc_oc_sq(rdev, &wq->sq) && alloc_host_sq(rdev, &wq->sq))
165 goto err5;
166 } else
167 if (alloc_host_sq(rdev, &wq->sq))
168 goto err5;
cfdda9d7 169 memset(wq->sq.queue, 0, wq->sq.memsize);
f38926aa 170 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr);
cfdda9d7
SW		 171
172 wq->rq.queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev),
173 wq->rq.memsize, &(wq->rq.dma_addr),
174 GFP_KERNEL);
175 if (!wq->rq.queue)
176 goto err6;
177 PDBG("%s sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n",
178 __func__, wq->sq.queue,
179 (unsigned long long)virt_to_phys(wq->sq.queue),
180 wq->rq.queue,
181 (unsigned long long)virt_to_phys(wq->rq.queue));
182 memset(wq->rq.queue, 0, wq->rq.memsize);
f38926aa 183 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr);
cfdda9d7
SW		 184
185 wq->db = rdev->lldi.db_reg;
186 wq->gts = rdev->lldi.gts_reg;
187 if (user) {
188 wq->sq.udb = (u64)pci_resource_start(rdev->lldi.pdev, 2) +
189 (wq->sq.qid << rdev->qpshift);
190 wq->sq.udb &= PAGE_MASK;
191 wq->rq.udb = (u64)pci_resource_start(rdev->lldi.pdev, 2) +
192 (wq->rq.qid << rdev->qpshift);
193 wq->rq.udb &= PAGE_MASK;
194 }
195 wq->rdev = rdev;
196 wq->rq.msn = 1;
197
198 /* build fw_ri_res_wr */
199 wr_len = sizeof *res_wr + 2 * sizeof *res;
200
d3c814e8 201 skb = alloc_skb(wr_len, GFP_KERNEL);
cfdda9d7
SW		 202 if (!skb) {
203 ret = -ENOMEM;
204 goto err7;
205 }
206 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
207
208 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len);
209 memset(res_wr, 0, wr_len);
210 res_wr->op_nres = cpu_to_be32(
211 FW_WR_OP(FW_RI_RES_WR) |
212 V_FW_RI_RES_WR_NRES(2) |
213 FW_WR_COMPL(1));
214 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16));
c8e081a1 215 res_wr->cookie = (unsigned long) &wr_wait;
cfdda9d7
SW		 216 res = res_wr->res;
217 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ;
218 res->u.sqrq.op = FW_RI_RES_OP_WRITE;
219
220 /*
221 * eqsize is the number of 64B entries plus the status page size.
222 */
223 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + T4_EQ_STATUS_ENTRIES;
224
225 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
226 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */
227 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */
228 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */
85d215b0 229 (t4_sq_onchip(&wq->sq) ? F_FW_RI_RES_WR_ONCHIP : 0) |
cfdda9d7
SW		 230 V_FW_RI_RES_WR_IQID(scq->cqid));
231 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
232 V_FW_RI_RES_WR_DCAEN(0) |
233 V_FW_RI_RES_WR_DCACPU(0) |
d37ac31d 234 V_FW_RI_RES_WR_FBMIN(2) |
6a09a9d6 235 V_FW_RI_RES_WR_FBMAX(2) |
cfdda9d7
SW		 236 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
237 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
238 V_FW_RI_RES_WR_EQSIZE(eqsize));
239 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid);
240 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr);
241 res++;
242 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ;
243 res->u.sqrq.op = FW_RI_RES_OP_WRITE;
244
245 /*
246 * eqsize is the number of 64B entries plus the status page size.
247 */
248 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + T4_EQ_STATUS_ENTRIES;
249 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32(
250 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */
251 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */
252 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */
253 V_FW_RI_RES_WR_IQID(rcq->cqid));
254 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32(
255 V_FW_RI_RES_WR_DCAEN(0) |
256 V_FW_RI_RES_WR_DCACPU(0) |
d37ac31d 257 V_FW_RI_RES_WR_FBMIN(2) |
6a09a9d6 258 V_FW_RI_RES_WR_FBMAX(2) |
cfdda9d7
SW		 259 V_FW_RI_RES_WR_CIDXFTHRESHO(0) |
260 V_FW_RI_RES_WR_CIDXFTHRESH(0) |
261 V_FW_RI_RES_WR_EQSIZE(eqsize));
262 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid);
263 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr);
264
265 c4iw_init_wr_wait(&wr_wait);
266
267 ret = c4iw_ofld_send(rdev, skb);
268 if (ret)
269 goto err7;
aadc4df3 270 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, __func__);
cfdda9d7
SW		 271 if (ret)
272 goto err7;
273
274 PDBG("%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%llx rqudb 0x%llx\n",
275 __func__, wq->sq.qid, wq->rq.qid, wq->db,
276 (unsigned long long)wq->sq.udb, (unsigned long long)wq->rq.udb);
277
278 return 0;
279err7:
280 dma_free_coherent(&(rdev->lldi.pdev->dev),
281 wq->rq.memsize, wq->rq.queue,
f38926aa 282 dma_unmap_addr(&wq->rq, mapping));
cfdda9d7 283err6:
c6d7b267 284 dealloc_sq(rdev, &wq->sq);
cfdda9d7
SW		 285err5:
286 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size);
287err4:
288 kfree(wq->rq.sw_rq);
289err3:
290 kfree(wq->sq.sw_sq);
291err2:
292 c4iw_put_qpid(rdev, wq->rq.qid, uctx);
293err1:
294 c4iw_put_qpid(rdev, wq->sq.qid, uctx);
295 return -ENOMEM;
296}
297
d37ac31d
SW		 298static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp,
299 struct ib_send_wr *wr, int max, u32 *plenp)
cfdda9d7 300{
d37ac31d
SW		 301 u8 *dstp, *srcp;
302 u32 plen = 0;
cfdda9d7 303 int i;
d37ac31d
SW		 304 int rem, len;
305
306 dstp = (u8 *)immdp->data;
307 for (i = 0; i < wr->num_sge; i++) {
308 if ((plen + wr->sg_list[i].length) > max)
309 return -EMSGSIZE;
310 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr;
311 plen += wr->sg_list[i].length;
312 rem = wr->sg_list[i].length;
313 while (rem) {
314 if (dstp == (u8 *)&sq->queue[sq->size])
315 dstp = (u8 *)sq->queue;
316 if (rem <= (u8 *)&sq->queue[sq->size] - dstp)
317 len = rem;
318 else
319 len = (u8 *)&sq->queue[sq->size] - dstp;
320 memcpy(dstp, srcp, len);
321 dstp += len;
322 srcp += len;
323 rem -= len;
324 }
325 }
13fecb83
SW		 326 len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp);
327 if (len)
328 memset(dstp, 0, len);
d37ac31d
SW		 329 immdp->op = FW_RI_DATA_IMMD;
330 immdp->r1 = 0;
331 immdp->r2 = 0;
332 immdp->immdlen = cpu_to_be32(plen);
333 *plenp = plen;
334 return 0;
335}
336
337static int build_isgl(__be64 *queue_start, __be64 *queue_end,
338 struct fw_ri_isgl *isglp, struct ib_sge *sg_list,
339 int num_sge, u32 *plenp)
340
341{
342 int i;
343 u32 plen = 0;
344 __be64 *flitp = (__be64 *)isglp->sge;
345
346 for (i = 0; i < num_sge; i++) {
347 if ((plen + sg_list[i].length) < plen)
348 return -EMSGSIZE;
349 plen += sg_list[i].length;
350 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) |
351 sg_list[i].length);
352 if (++flitp == queue_end)
353 flitp = queue_start;
354 *flitp = cpu_to_be64(sg_list[i].addr);
355 if (++flitp == queue_end)
356 flitp = queue_start;
357 }
13fecb83 358 *flitp = (__force __be64)0;
d37ac31d
SW		 359 isglp->op = FW_RI_DATA_ISGL;
360 isglp->r1 = 0;
361 isglp->nsge = cpu_to_be16(num_sge);
362 isglp->r2 = 0;
363 if (plenp)
364 *plenp = plen;
365 return 0;
366}
367
368static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe,
369 struct ib_send_wr *wr, u8 *len16)
370{
cfdda9d7
SW		 371 u32 plen;
372 int size;
d37ac31d 373 int ret;
cfdda9d7
SW		 374
375 if (wr->num_sge > T4_MAX_SEND_SGE)
376 return -EINVAL;
377 switch (wr->opcode) {
378 case IB_WR_SEND:
379 if (wr->send_flags & IB_SEND_SOLICITED)
380 wqe->send.sendop_pkd = cpu_to_be32(
381 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE));
382 else
383 wqe->send.sendop_pkd = cpu_to_be32(
384 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND));
385 wqe->send.stag_inv = 0;
386 break;
387 case IB_WR_SEND_WITH_INV:
388 if (wr->send_flags & IB_SEND_SOLICITED)
389 wqe->send.sendop_pkd = cpu_to_be32(
390 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV));
391 else
392 wqe->send.sendop_pkd = cpu_to_be32(
393 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV));
394 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
395 break;
396
397 default:
398 return -EINVAL;
399 }
d37ac31d 400
cfdda9d7
SW		 401 plen = 0;
402 if (wr->num_sge) {
403 if (wr->send_flags & IB_SEND_INLINE) {
d37ac31d
SW		 404 ret = build_immd(sq, wqe->send.u.immd_src, wr,
405 T4_MAX_SEND_INLINE, &plen);
406 if (ret)
407 return ret;
cfdda9d7
SW		 408 size = sizeof wqe->send + sizeof(struct fw_ri_immd) +
409 plen;
410 } else {
d37ac31d
SW		 411 ret = build_isgl((__be64 *)sq->queue,
412 (__be64 *)&sq->queue[sq->size],
413 wqe->send.u.isgl_src,
414 wr->sg_list, wr->num_sge, &plen);
415 if (ret)
416 return ret;
cfdda9d7
SW		 417 size = sizeof wqe->send + sizeof(struct fw_ri_isgl) +
418 wr->num_sge * sizeof(struct fw_ri_sge);
419 }
420 } else {
421 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD;
422 wqe->send.u.immd_src[0].r1 = 0;
423 wqe->send.u.immd_src[0].r2 = 0;
424 wqe->send.u.immd_src[0].immdlen = 0;
425 size = sizeof wqe->send + sizeof(struct fw_ri_immd);
d37ac31d 426 plen = 0;
cfdda9d7
SW		 427 }
428 *len16 = DIV_ROUND_UP(size, 16);
429 wqe->send.plen = cpu_to_be32(plen);
430 return 0;
431}
432
d37ac31d
SW		 433static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe,
434 struct ib_send_wr *wr, u8 *len16)
cfdda9d7 435{
cfdda9d7
SW		 436 u32 plen;
437 int size;
d37ac31d 438 int ret;
cfdda9d7 439
d37ac31d 440 if (wr->num_sge > T4_MAX_SEND_SGE)
cfdda9d7
SW		 441 return -EINVAL;
442 wqe->write.r2 = 0;
443 wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
444 wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr);
cfdda9d7
SW		 445 if (wr->num_sge) {
446 if (wr->send_flags & IB_SEND_INLINE) {
d37ac31d
SW		 447 ret = build_immd(sq, wqe->write.u.immd_src, wr,
448 T4_MAX_WRITE_INLINE, &plen);
449 if (ret)
450 return ret;
cfdda9d7
SW		 451 size = sizeof wqe->write + sizeof(struct fw_ri_immd) +
452 plen;
453 } else {
d37ac31d
SW		 454 ret = build_isgl((__be64 *)sq->queue,
455 (__be64 *)&sq->queue[sq->size],
456 wqe->write.u.isgl_src,
457 wr->sg_list, wr->num_sge, &plen);
458 if (ret)
459 return ret;
cfdda9d7
SW		 460 size = sizeof wqe->write + sizeof(struct fw_ri_isgl) +
461 wr->num_sge * sizeof(struct fw_ri_sge);
462 }
463 } else {
464 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD;
465 wqe->write.u.immd_src[0].r1 = 0;
466 wqe->write.u.immd_src[0].r2 = 0;
467 wqe->write.u.immd_src[0].immdlen = 0;
468 size = sizeof wqe->write + sizeof(struct fw_ri_immd);
d37ac31d 469 plen = 0;
cfdda9d7
SW		 470 }
471 *len16 = DIV_ROUND_UP(size, 16);
472 wqe->write.plen = cpu_to_be32(plen);
473 return 0;
474}
475
476static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
477{
478 if (wr->num_sge > 1)
479 return -EINVAL;
480 if (wr->num_sge) {
481 wqe->read.stag_src = cpu_to_be32(wr->wr.rdma.rkey);
482 wqe->read.to_src_hi = cpu_to_be32((u32)(wr->wr.rdma.remote_addr
483 >> 32));
484 wqe->read.to_src_lo = cpu_to_be32((u32)wr->wr.rdma.remote_addr);
485 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey);
486 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length);
487 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr
488 >> 32));
489 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr));
490 } else {
491 wqe->read.stag_src = cpu_to_be32(2);
492 wqe->read.to_src_hi = 0;
493 wqe->read.to_src_lo = 0;
494 wqe->read.stag_sink = cpu_to_be32(2);
495 wqe->read.plen = 0;
496 wqe->read.to_sink_hi = 0;
497 wqe->read.to_sink_lo = 0;
498 }
499 wqe->read.r2 = 0;
500 wqe->read.r5 = 0;
501 *len16 = DIV_ROUND_UP(sizeof wqe->read, 16);
502 return 0;
503}
504
505static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe,
506 struct ib_recv_wr *wr, u8 *len16)
507{
d37ac31d 508 int ret;
cfdda9d7 509
d37ac31d
SW		 510 ret = build_isgl((__be64 *)qhp->wq.rq.queue,
511 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size],
512 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL);
513 if (ret)
514 return ret;
cfdda9d7
SW		 515 *len16 = DIV_ROUND_UP(sizeof wqe->recv +
516 wr->num_sge * sizeof(struct fw_ri_sge), 16);
517 return 0;
518}
519
40dbf6ee
SW		 520static int build_fastreg(struct t4_sq *sq, union t4_wr *wqe,
521 struct ib_send_wr *wr, u8 *len16)
cfdda9d7
SW		 522{
523
524 struct fw_ri_immd *imdp;
525 __be64 *p;
526 int i;
527 int pbllen = roundup(wr->wr.fast_reg.page_list_len * sizeof(u64), 32);
40dbf6ee 528 int rem;
cfdda9d7
SW		 529
530 if (wr->wr.fast_reg.page_list_len > T4_MAX_FR_DEPTH)
531 return -EINVAL;
532
533 wqe->fr.qpbinde_to_dcacpu = 0;
534 wqe->fr.pgsz_shift = wr->wr.fast_reg.page_shift - 12;
535 wqe->fr.addr_type = FW_RI_VA_BASED_TO;
536 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->wr.fast_reg.access_flags);
537 wqe->fr.len_hi = 0;
538 wqe->fr.len_lo = cpu_to_be32(wr->wr.fast_reg.length);
539 wqe->fr.stag = cpu_to_be32(wr->wr.fast_reg.rkey);
540 wqe->fr.va_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32);
541 wqe->fr.va_lo_fbo = cpu_to_be32(wr->wr.fast_reg.iova_start &
542 0xffffffff);
40dbf6ee
SW		 543 WARN_ON(pbllen > T4_MAX_FR_IMMD);
544 imdp = (struct fw_ri_immd *)(&wqe->fr + 1);
545 imdp->op = FW_RI_DATA_IMMD;
546 imdp->r1 = 0;
547 imdp->r2 = 0;
548 imdp->immdlen = cpu_to_be32(pbllen);
549 p = (__be64 *)(imdp + 1);
550 rem = pbllen;
551 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
552 *p = cpu_to_be64((u64)wr->wr.fast_reg.page_list->page_list[i]);
553 rem -= sizeof *p;
554 if (++p == (__be64 *)&sq->queue[sq->size])
555 p = (__be64 *)sq->queue;
556 }
557 BUG_ON(rem < 0);
558 while (rem) {
559 *p = 0;
560 rem -= sizeof *p;
561 if (++p == (__be64 *)&sq->queue[sq->size])
562 p = (__be64 *)sq->queue;
cfdda9d7 563 }
40dbf6ee 564 *len16 = DIV_ROUND_UP(sizeof wqe->fr + sizeof *imdp + pbllen, 16);
cfdda9d7
SW		 565 return 0;
566}
567
568static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr,
569 u8 *len16)
570{
571 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey);
572 wqe->inv.r2 = 0;
573 *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16);
574 return 0;
575}
576
577void c4iw_qp_add_ref(struct ib_qp *qp)
578{
579 PDBG("%s ib_qp %p\n", __func__, qp);
580 atomic_inc(&(to_c4iw_qp(qp)->refcnt));
581}
582
583void c4iw_qp_rem_ref(struct ib_qp *qp)
584{
585 PDBG("%s ib_qp %p\n", __func__, qp);
586 if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt)))
587 wake_up(&(to_c4iw_qp(qp)->wait));
588}
589
590int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
591 struct ib_send_wr **bad_wr)
592{
593 int err = 0;
594 u8 len16 = 0;
595 enum fw_wr_opcodes fw_opcode = 0;
596 enum fw_ri_wr_flags fw_flags;
597 struct c4iw_qp *qhp;
598 union t4_wr *wqe;
599 u32 num_wrs;
600 struct t4_swsqe *swsqe;
601 unsigned long flag;
602 u16 idx = 0;
603
604 qhp = to_c4iw_qp(ibqp);
605 spin_lock_irqsave(&qhp->lock, flag);
606 if (t4_wq_in_error(&qhp->wq)) {
607 spin_unlock_irqrestore(&qhp->lock, flag);
608 return -EINVAL;
609 }
610 num_wrs = t4_sq_avail(&qhp->wq);
611 if (num_wrs == 0) {
612 spin_unlock_irqrestore(&qhp->lock, flag);
613 return -ENOMEM;
614 }
615 while (wr) {
616 if (num_wrs == 0) {
617 err = -ENOMEM;
618 *bad_wr = wr;
619 break;
620 }
d37ac31d
SW		 621 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue +
622 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE);
623
cfdda9d7
SW		 624 fw_flags = 0;
625 if (wr->send_flags & IB_SEND_SOLICITED)
626 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG;
627 if (wr->send_flags & IB_SEND_SIGNALED)
628 fw_flags |= FW_RI_COMPLETION_FLAG;
629 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx];
630 switch (wr->opcode) {
631 case IB_WR_SEND_WITH_INV:
632 case IB_WR_SEND:
633 if (wr->send_flags & IB_SEND_FENCE)
634 fw_flags |= FW_RI_READ_FENCE_FLAG;
635 fw_opcode = FW_RI_SEND_WR;
636 if (wr->opcode == IB_WR_SEND)
637 swsqe->opcode = FW_RI_SEND;
638 else
639 swsqe->opcode = FW_RI_SEND_WITH_INV;
d37ac31d 640 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16);
cfdda9d7
SW		 641 break;
642 case IB_WR_RDMA_WRITE:
643 fw_opcode = FW_RI_RDMA_WRITE_WR;
644 swsqe->opcode = FW_RI_RDMA_WRITE;
d37ac31d 645 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16);
cfdda9d7
SW		 646 break;
647 case IB_WR_RDMA_READ:
2f1fb507 648 case IB_WR_RDMA_READ_WITH_INV:
cfdda9d7
SW		 649 fw_opcode = FW_RI_RDMA_READ_WR;
650 swsqe->opcode = FW_RI_READ_REQ;
2f1fb507 651 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV)
410ade4c 652 fw_flags = FW_RI_RDMA_READ_INVALIDATE;
2f1fb507
SW		 653 else
654 fw_flags = 0;
cfdda9d7
SW		 655 err = build_rdma_read(wqe, wr, &len16);
656 if (err)
657 break;
658 swsqe->read_len = wr->sg_list[0].length;
659 if (!qhp->wq.sq.oldest_read)
660 qhp->wq.sq.oldest_read = swsqe;
661 break;
662 case IB_WR_FAST_REG_MR:
663 fw_opcode = FW_RI_FR_NSMR_WR;
664 swsqe->opcode = FW_RI_FAST_REGISTER;
40dbf6ee 665 err = build_fastreg(&qhp->wq.sq, wqe, wr, &len16);
cfdda9d7
SW		 666 break;
667 case IB_WR_LOCAL_INV:
4ab1eb9c
SW		 668 if (wr->send_flags & IB_SEND_FENCE)
669 fw_flags |= FW_RI_LOCAL_FENCE_FLAG;
cfdda9d7
SW		 670 fw_opcode = FW_RI_INV_LSTAG_WR;
671 swsqe->opcode = FW_RI_LOCAL_INV;
672 err = build_inv_stag(wqe, wr, &len16);
673 break;
674 default:
675 PDBG("%s post of type=%d TBD!\n", __func__,
676 wr->opcode);
677 err = -EINVAL;
678 }
679 if (err) {
680 *bad_wr = wr;
681 break;
682 }
683 swsqe->idx = qhp->wq.sq.pidx;
684 swsqe->complete = 0;
685 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED);
686 swsqe->wr_id = wr->wr_id;
687
688 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16);
689
690 PDBG("%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n",
691 __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx,
692 swsqe->opcode, swsqe->read_len);
693 wr = wr->next;
694 num_wrs--;
d37ac31d
SW		 695 t4_sq_produce(&qhp->wq, len16);
696 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
cfdda9d7
SW		 697 }
698 if (t4_wq_db_enabled(&qhp->wq))
699 t4_ring_sq_db(&qhp->wq, idx);
700 spin_unlock_irqrestore(&qhp->lock, flag);
701 return err;
702}
703
704int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
705 struct ib_recv_wr **bad_wr)
706{
707 int err = 0;
708 struct c4iw_qp *qhp;
709 union t4_recv_wr *wqe;
710 u32 num_wrs;
711 u8 len16 = 0;
712 unsigned long flag;
713 u16 idx = 0;
714
715 qhp = to_c4iw_qp(ibqp);
716 spin_lock_irqsave(&qhp->lock, flag);
717 if (t4_wq_in_error(&qhp->wq)) {
718 spin_unlock_irqrestore(&qhp->lock, flag);
719 return -EINVAL;
720 }
721 num_wrs = t4_rq_avail(&qhp->wq);
722 if (num_wrs == 0) {
723 spin_unlock_irqrestore(&qhp->lock, flag);
724 return -ENOMEM;
725 }
726 while (wr) {
727 if (wr->num_sge > T4_MAX_RECV_SGE) {
728 err = -EINVAL;
729 *bad_wr = wr;
730 break;
731 }
d37ac31d
SW		 732 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue +
733 qhp->wq.rq.wq_pidx *
734 T4_EQ_ENTRY_SIZE);
cfdda9d7
SW		 735 if (num_wrs)
736 err = build_rdma_recv(qhp, wqe, wr, &len16);
737 else
738 err = -ENOMEM;
739 if (err) {
740 *bad_wr = wr;
741 break;
742 }
743
744 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id;
745
746 wqe->recv.opcode = FW_RI_RECV_WR;
747 wqe->recv.r1 = 0;
748 wqe->recv.wrid = qhp->wq.rq.pidx;
749 wqe->recv.r2[0] = 0;
750 wqe->recv.r2[1] = 0;
751 wqe->recv.r2[2] = 0;
752 wqe->recv.len16 = len16;
cfdda9d7
SW		 753 PDBG("%s cookie 0x%llx pidx %u\n", __func__,
754 (unsigned long long) wr->wr_id, qhp->wq.rq.pidx);
d37ac31d
SW		 755 t4_rq_produce(&qhp->wq, len16);
756 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
cfdda9d7
SW		 757 wr = wr->next;
758 num_wrs--;
cfdda9d7
SW		 759 }
760 if (t4_wq_db_enabled(&qhp->wq))
761 t4_ring_rq_db(&qhp->wq, idx);
762 spin_unlock_irqrestore(&qhp->lock, flag);
763 return err;
764}
765
766int c4iw_bind_mw(struct ib_qp *qp, struct ib_mw *mw, struct ib_mw_bind *mw_bind)
767{
768 return -ENOSYS;
769}
770
771static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type,
772 u8 *ecode)
773{
774 int status;
775 int tagged;
776 int opcode;
777 int rqtype;
778 int send_inv;
779
780 if (!err_cqe) {
781 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
782 *ecode = 0;
783 return;
784 }
785
786 status = CQE_STATUS(err_cqe);
787 opcode = CQE_OPCODE(err_cqe);
788 rqtype = RQ_TYPE(err_cqe);
789 send_inv = (opcode == FW_RI_SEND_WITH_INV) ||
790 (opcode == FW_RI_SEND_WITH_SE_INV);
791 tagged = (opcode == FW_RI_RDMA_WRITE) ||
792 (rqtype && (opcode == FW_RI_READ_RESP));
793
794 switch (status) {
795 case T4_ERR_STAG:
796 if (send_inv) {
797 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
798 *ecode = RDMAP_CANT_INV_STAG;
799 } else {
800 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
801 *ecode = RDMAP_INV_STAG;
802 }
803 break;
804 case T4_ERR_PDID:
805 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
806 if ((opcode == FW_RI_SEND_WITH_INV) ||
807 (opcode == FW_RI_SEND_WITH_SE_INV))
808 *ecode = RDMAP_CANT_INV_STAG;
809 else
810 *ecode = RDMAP_STAG_NOT_ASSOC;
811 break;
812 case T4_ERR_QPID:
813 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
814 *ecode = RDMAP_STAG_NOT_ASSOC;
815 break;
816 case T4_ERR_ACCESS:
817 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
818 *ecode = RDMAP_ACC_VIOL;
819 break;
820 case T4_ERR_WRAP:
821 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
822 *ecode = RDMAP_TO_WRAP;
823 break;
824 case T4_ERR_BOUND:
825 if (tagged) {
826 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
827 *ecode = DDPT_BASE_BOUNDS;
828 } else {
829 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
830 *ecode = RDMAP_BASE_BOUNDS;
831 }
832 break;
833 case T4_ERR_INVALIDATE_SHARED_MR:
834 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
835 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
836 *ecode = RDMAP_CANT_INV_STAG;
837 break;
838 case T4_ERR_ECC:
839 case T4_ERR_ECC_PSTAG:
840 case T4_ERR_INTERNAL_ERR:
841 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
842 *ecode = 0;
843 break;
844 case T4_ERR_OUT_OF_RQE:
845 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
846 *ecode = DDPU_INV_MSN_NOBUF;
847 break;
848 case T4_ERR_PBL_ADDR_BOUND:
849 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
850 *ecode = DDPT_BASE_BOUNDS;
851 break;
852 case T4_ERR_CRC:
853 *layer_type = LAYER_MPA|DDP_LLP;
854 *ecode = MPA_CRC_ERR;
855 break;
856 case T4_ERR_MARKER:
857 *layer_type = LAYER_MPA|DDP_LLP;
858 *ecode = MPA_MARKER_ERR;
859 break;
860 case T4_ERR_PDU_LEN_ERR:
861 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
862 *ecode = DDPU_MSG_TOOBIG;
863 break;
864 case T4_ERR_DDP_VERSION:
865 if (tagged) {
866 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
867 *ecode = DDPT_INV_VERS;
868 } else {
869 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
870 *ecode = DDPU_INV_VERS;
871 }
872 break;
873 case T4_ERR_RDMA_VERSION:
874 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
875 *ecode = RDMAP_INV_VERS;
876 break;
877 case T4_ERR_OPCODE:
878 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
879 *ecode = RDMAP_INV_OPCODE;
880 break;
881 case T4_ERR_DDP_QUEUE_NUM:
882 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
883 *ecode = DDPU_INV_QN;
884 break;
885 case T4_ERR_MSN:
886 case T4_ERR_MSN_GAP:
887 case T4_ERR_MSN_RANGE:
888 case T4_ERR_IRD_OVERFLOW:
889 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
890 *ecode = DDPU_INV_MSN_RANGE;
891 break;
892 case T4_ERR_TBIT:
893 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
894 *ecode = 0;
895 break;
896 case T4_ERR_MO:
897 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
898 *ecode = DDPU_INV_MO;
899 break;
900 default:
901 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
902 *ecode = 0;
903 break;
904 }
905}
906
be4c9bad
RD		 907static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe,
908 gfp_t gfp)
cfdda9d7
SW		 909{
910 struct fw_ri_wr *wqe;
911 struct sk_buff *skb;
912 struct terminate_message *term;
913
914 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
915 qhp->ep->hwtid);
916
be4c9bad 917 skb = alloc_skb(sizeof *wqe, gfp);
cfdda9d7 918 if (!skb)
be4c9bad 919 return;
cfdda9d7
SW		 920 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
921
922 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
923 memset(wqe, 0, sizeof *wqe);
924 wqe->op_compl = cpu_to_be32(FW_WR_OP(FW_RI_INIT_WR));
925 wqe->flowid_len16 = cpu_to_be32(
926 FW_WR_FLOWID(qhp->ep->hwtid) |
927 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
928
929 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE;
930 wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term);
931 term = (struct terminate_message *)wqe->u.terminate.termmsg;
d2fe99e8
KS		 932 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) {
933 term->layer_etype = qhp->attr.layer_etype;
934 term->ecode = qhp->attr.ecode;
935 } else
936 build_term_codes(err_cqe, &term->layer_etype, &term->ecode);
be4c9bad 937 c4iw_ofld_send(&qhp->rhp->rdev, skb);
cfdda9d7
SW		 938}
939
940/*
941 * Assumes qhp lock is held.
942 */
943static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
2f5b48c3 944 struct c4iw_cq *schp)
cfdda9d7
SW		 945{
946 int count;
947 int flushed;
2f5b48c3 948 unsigned long flag;
cfdda9d7
SW		 949
950 PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
cfdda9d7 951
732bee7a 952 /* locking hierarchy: cq lock first, then qp lock. */
2f5b48c3 953 spin_lock_irqsave(&rchp->lock, flag);
cfdda9d7
SW		 954 spin_lock(&qhp->lock);
955 c4iw_flush_hw_cq(&rchp->cq);
956 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
957 flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
958 spin_unlock(&qhp->lock);
2f5b48c3 959 spin_unlock_irqrestore(&rchp->lock, flag);
581bbe2c
KS		 960 if (flushed) {
961 spin_lock_irqsave(&rchp->comp_handler_lock, flag);
cfdda9d7 962 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
581bbe2c
KS		 963 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
964 }
cfdda9d7 965
732bee7a 966 /* locking hierarchy: cq lock first, then qp lock. */
2f5b48c3 967 spin_lock_irqsave(&schp->lock, flag);
cfdda9d7
SW		 968 spin_lock(&qhp->lock);
969 c4iw_flush_hw_cq(&schp->cq);
970 c4iw_count_scqes(&schp->cq, &qhp->wq, &count);
971 flushed = c4iw_flush_sq(&qhp->wq, &schp->cq, count);
972 spin_unlock(&qhp->lock);
2f5b48c3 973 spin_unlock_irqrestore(&schp->lock, flag);
581bbe2c
KS		 974 if (flushed) {
975 spin_lock_irqsave(&schp->comp_handler_lock, flag);
cfdda9d7 976 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
581bbe2c
KS		 977 spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
978 }
cfdda9d7
SW		 979}
980
2f5b48c3 981static void flush_qp(struct c4iw_qp *qhp)
cfdda9d7
SW		 982{
983 struct c4iw_cq *rchp, *schp;
581bbe2c 984 unsigned long flag;
cfdda9d7
SW		 985
986 rchp = get_chp(qhp->rhp, qhp->attr.rcq);
987 schp = get_chp(qhp->rhp, qhp->attr.scq);
988
989 if (qhp->ibqp.uobject) {
990 t4_set_wq_in_error(&qhp->wq);
991 t4_set_cq_in_error(&rchp->cq);
581bbe2c 992 spin_lock_irqsave(&rchp->comp_handler_lock, flag);
01e7da6b 993 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
581bbe2c 994 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
01e7da6b 995 if (schp != rchp) {
cfdda9d7 996 t4_set_cq_in_error(&schp->cq);
581bbe2c 997 spin_lock_irqsave(&schp->comp_handler_lock, flag);
01e7da6b
KS		 998 (*schp->ibcq.comp_handler)(&schp->ibcq,
999 schp->ibcq.cq_context);
581bbe2c 1000 spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
01e7da6b 1001 }
cfdda9d7
SW		 1002 return;
1003 }
2f5b48c3 1004 __flush_qp(qhp, rchp, schp);
cfdda9d7
SW		 1005}
1006
73d6fcad
SW		 1007static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
1008 struct c4iw_ep *ep)
cfdda9d7
SW		 1009{
1010 struct fw_ri_wr *wqe;
1011 int ret;
cfdda9d7
SW		 1012 struct sk_buff *skb;
1013
1014 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
73d6fcad 1015 ep->hwtid);
cfdda9d7 1016
d3c814e8 1017 skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
cfdda9d7
SW		 1018 if (!skb)
1019 return -ENOMEM;
73d6fcad 1020 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
cfdda9d7
SW		 1021
1022 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
1023 memset(wqe, 0, sizeof *wqe);
1024 wqe->op_compl = cpu_to_be32(
1025 FW_WR_OP(FW_RI_INIT_WR) |
1026 FW_WR_COMPL(1));
1027 wqe->flowid_len16 = cpu_to_be32(
73d6fcad 1028 FW_WR_FLOWID(ep->hwtid) |
cfdda9d7 1029 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
2f5b48c3 1030 wqe->cookie = (unsigned long) &ep->com.wr_wait;
cfdda9d7
SW		 1031
1032 wqe->u.fini.type = FW_RI_TYPE_FINI;
cfdda9d7
SW		 1033 ret = c4iw_ofld_send(&rhp->rdev, skb);
1034 if (ret)
1035 goto out;
1036
2f5b48c3 1037 ret = c4iw_wait_for_reply(&rhp->rdev, &ep->com.wr_wait, qhp->ep->hwtid,
aadc4df3 1038 qhp->wq.sq.qid, __func__);
cfdda9d7
SW		 1039out:
1040 PDBG("%s ret %d\n", __func__, ret);
1041 return ret;
1042}
1043
1044static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init)
1045{
d2fe99e8 1046 PDBG("%s p2p_type = %d\n", __func__, p2p_type);
cfdda9d7
SW		 1047 memset(&init->u, 0, sizeof init->u);
1048 switch (p2p_type) {
1049 case FW_RI_INIT_P2PTYPE_RDMA_WRITE:
1050 init->u.write.opcode = FW_RI_RDMA_WRITE_WR;
1051 init->u.write.stag_sink = cpu_to_be32(1);
1052 init->u.write.to_sink = cpu_to_be64(1);
1053 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD;
1054 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write +
1055 sizeof(struct fw_ri_immd),
1056 16);
1057 break;
1058 case FW_RI_INIT_P2PTYPE_READ_REQ:
1059 init->u.write.opcode = FW_RI_RDMA_READ_WR;
1060 init->u.read.stag_src = cpu_to_be32(1);
1061 init->u.read.to_src_lo = cpu_to_be32(1);
1062 init->u.read.stag_sink = cpu_to_be32(1);
1063 init->u.read.to_sink_lo = cpu_to_be32(1);
1064 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16);
1065 break;
1066 }
1067}
1068
1069static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp)
1070{
1071 struct fw_ri_wr *wqe;
1072 int ret;
cfdda9d7
SW		 1073 struct sk_buff *skb;
1074
1075 PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid,
1076 qhp->ep->hwtid);
1077
d3c814e8 1078 skb = alloc_skb(sizeof *wqe, GFP_KERNEL);
cfdda9d7
SW		 1079 if (!skb)
1080 return -ENOMEM;
1081 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx);
1082
1083 wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe));
1084 memset(wqe, 0, sizeof *wqe);
1085 wqe->op_compl = cpu_to_be32(
1086 FW_WR_OP(FW_RI_INIT_WR) |
1087 FW_WR_COMPL(1));
1088 wqe->flowid_len16 = cpu_to_be32(
1089 FW_WR_FLOWID(qhp->ep->hwtid) |
1090 FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16)));
1091
2f5b48c3 1092 wqe->cookie = (unsigned long) &qhp->ep->com.wr_wait;
cfdda9d7
SW		 1093
1094 wqe->u.init.type = FW_RI_TYPE_INIT;
1095 wqe->u.init.mpareqbit_p2ptype =
1096 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) |
1097 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type);
1098 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE;
1099 if (qhp->attr.mpa_attr.recv_marker_enabled)
1100 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE;
1101 if (qhp->attr.mpa_attr.xmit_marker_enabled)
1102 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE;
1103 if (qhp->attr.mpa_attr.crc_enabled)
1104 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE;
1105
1106 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE |
1107 FW_RI_QP_RDMA_WRITE_ENABLE |
1108 FW_RI_QP_BIND_ENABLE;
1109 if (!qhp->ibqp.uobject)
1110 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE |
1111 FW_RI_QP_STAG0_ENABLE;
1112 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq));
1113 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd);
1114 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid);
1115 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid);
1116 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid);
1117 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq);
1118 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq);
1119 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord);
1120 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird);
1121 wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq);
1122 wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq);
1123 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size);
1124 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr -
1125 rhp->rdev.lldi.vr->rq.start);
1126 if (qhp->attr.mpa_attr.initiator)
1127 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init);
1128
cfdda9d7
SW		 1129 ret = c4iw_ofld_send(&rhp->rdev, skb);
1130 if (ret)
1131 goto out;
1132
2f5b48c3
SW		 1133 ret = c4iw_wait_for_reply(&rhp->rdev, &qhp->ep->com.wr_wait,
1134 qhp->ep->hwtid, qhp->wq.sq.qid, __func__);
cfdda9d7
SW		 1135out:
1136 PDBG("%s ret %d\n", __func__, ret);
1137 return ret;
1138}
1139
2c974781
VP		 1140/*
1141 * Called by the library when the qp has user dbs disabled due to
1142 * a DB_FULL condition. This function will single-thread all user
1143 * DB rings to avoid overflowing the hw db-fifo.
1144 */
1145static int ring_kernel_db(struct c4iw_qp *qhp, u32 qid, u16 inc)
1146{
1147 int delay = db_delay_usecs;
1148
1149 mutex_lock(&qhp->rhp->db_mutex);
1150 do {
422eea0a
VP		 1151
1152 /*
1153 * The interrupt threshold is dbfifo_int_thresh << 6. So
1154 * make sure we don't cross that and generate an interrupt.
1155 */
1156 if (cxgb4_dbfifo_count(qhp->rhp->rdev.lldi.ports[0], 1) <
1157 (qhp->rhp->rdev.lldi.dbfifo_int_thresh << 5)) {
2c974781
VP		 1158 writel(V_QID(qid) | V_PIDX(inc), qhp->wq.db);
1159 break;
1160 }
1161 set_current_state(TASK_UNINTERRUPTIBLE);
1162 schedule_timeout(usecs_to_jiffies(delay));
422eea0a 1163 delay = min(delay << 1, 2000);
2c974781
VP		 1164 } while (1);
1165 mutex_unlock(&qhp->rhp->db_mutex);
1166 return 0;
1167}
1168
cfdda9d7
SW		 1169int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
1170 enum c4iw_qp_attr_mask mask,
1171 struct c4iw_qp_attributes *attrs,
1172 int internal)
1173{
1174 int ret = 0;
1175 struct c4iw_qp_attributes newattr = qhp->attr;
cfdda9d7
SW		 1176 int disconnect = 0;
1177 int terminate = 0;
1178 int abort = 0;
1179 int free = 0;
1180 struct c4iw_ep *ep = NULL;
1181
1182 PDBG("%s qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", __func__,
1183 qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state,
1184 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
1185
2f5b48c3 1186 mutex_lock(&qhp->mutex);
cfdda9d7
SW		 1187
1188 /* Process attr changes if in IDLE */
1189 if (mask & C4IW_QP_ATTR_VALID_MODIFY) {
1190 if (qhp->attr.state != C4IW_QP_STATE_IDLE) {
1191 ret = -EIO;
1192 goto out;
1193 }
1194 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ)
1195 newattr.enable_rdma_read = attrs->enable_rdma_read;
1196 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE)
1197 newattr.enable_rdma_write = attrs->enable_rdma_write;
1198 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND)
1199 newattr.enable_bind = attrs->enable_bind;
1200 if (mask & C4IW_QP_ATTR_MAX_ORD) {
be4c9bad 1201 if (attrs->max_ord > c4iw_max_read_depth) {
cfdda9d7
SW		 1202 ret = -EINVAL;
1203 goto out;
1204 }
1205 newattr.max_ord = attrs->max_ord;
1206 }
1207 if (mask & C4IW_QP_ATTR_MAX_IRD) {
be4c9bad 1208 if (attrs->max_ird > c4iw_max_read_depth) {
cfdda9d7
SW		 1209 ret = -EINVAL;
1210 goto out;
1211 }
1212 newattr.max_ird = attrs->max_ird;
1213 }
1214 qhp->attr = newattr;
1215 }
1216
2c974781
VP		 1217 if (mask & C4IW_QP_ATTR_SQ_DB) {
1218 ret = ring_kernel_db(qhp, qhp->wq.sq.qid, attrs->sq_db_inc);
1219 goto out;
1220 }
1221 if (mask & C4IW_QP_ATTR_RQ_DB) {
1222 ret = ring_kernel_db(qhp, qhp->wq.rq.qid, attrs->rq_db_inc);
1223 goto out;
1224 }
1225
cfdda9d7
SW		 1226 if (!(mask & C4IW_QP_ATTR_NEXT_STATE))
1227 goto out;
1228 if (qhp->attr.state == attrs->next_state)
1229 goto out;
1230
1231 switch (qhp->attr.state) {
1232 case C4IW_QP_STATE_IDLE:
1233 switch (attrs->next_state) {
1234 case C4IW_QP_STATE_RTS:
1235 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) {
1236 ret = -EINVAL;
1237 goto out;
1238 }
1239 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) {
1240 ret = -EINVAL;
1241 goto out;
1242 }
1243 qhp->attr.mpa_attr = attrs->mpa_attr;
1244 qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
1245 qhp->ep = qhp->attr.llp_stream_handle;
2f5b48c3 1246 set_state(qhp, C4IW_QP_STATE_RTS);
cfdda9d7
SW		 1247
1248 /*
1249 * Ref the endpoint here and deref when we
1250 * disassociate the endpoint from the QP. This
1251 * happens in CLOSING->IDLE transition or *->ERROR
1252 * transition.
1253 */
1254 c4iw_get_ep(&qhp->ep->com);
cfdda9d7 1255 ret = rdma_init(rhp, qhp);
cfdda9d7
SW		 1256 if (ret)
1257 goto err;
1258 break;
1259 case C4IW_QP_STATE_ERROR:
2f5b48c3
SW		 1260 set_state(qhp, C4IW_QP_STATE_ERROR);
1261 flush_qp(qhp);
cfdda9d7
SW		 1262 break;
1263 default:
1264 ret = -EINVAL;
1265 goto out;
1266 }
1267 break;
1268 case C4IW_QP_STATE_RTS:
1269 switch (attrs->next_state) {
1270 case C4IW_QP_STATE_CLOSING:
1271 BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
2f5b48c3 1272 set_state(qhp, C4IW_QP_STATE_CLOSING);
73d6fcad 1273 ep = qhp->ep;
cfdda9d7
SW		 1274 if (!internal) {
1275 abort = 0;
1276 disconnect = 1;
2f5b48c3 1277 c4iw_get_ep(&qhp->ep->com);
cfdda9d7 1278 }
d32ae393
TT		 1279 if (qhp->ibqp.uobject)
1280 t4_set_wq_in_error(&qhp->wq);
73d6fcad 1281 ret = rdma_fini(rhp, qhp, ep);
8da7e7a5 1282 if (ret)
cfdda9d7 1283 goto err;
cfdda9d7
SW		 1284 break;
1285 case C4IW_QP_STATE_TERMINATE:
2f5b48c3 1286 set_state(qhp, C4IW_QP_STATE_TERMINATE);
d2fe99e8
KS		 1287 qhp->attr.layer_etype = attrs->layer_etype;
1288 qhp->attr.ecode = attrs->ecode;
cfdda9d7
SW		 1289 if (qhp->ibqp.uobject)
1290 t4_set_wq_in_error(&qhp->wq);
be4c9bad 1291 ep = qhp->ep;
0e42c1f4
SW		 1292 if (!internal)
1293 terminate = 1;
be4c9bad 1294 disconnect = 1;
2f5b48c3 1295 c4iw_get_ep(&qhp->ep->com);
cfdda9d7
SW		 1296 break;
1297 case C4IW_QP_STATE_ERROR:
2f5b48c3 1298 set_state(qhp, C4IW_QP_STATE_ERROR);
d32ae393
TT		 1299 if (qhp->ibqp.uobject)
1300 t4_set_wq_in_error(&qhp->wq);
cfdda9d7
SW		 1301 if (!internal) {
1302 abort = 1;
1303 disconnect = 1;
1304 ep = qhp->ep;
2f5b48c3 1305 c4iw_get_ep(&qhp->ep->com);
cfdda9d7
SW		 1306 }
1307 goto err;
1308 break;
1309 default:
1310 ret = -EINVAL;
1311 goto out;
1312 }
1313 break;
1314 case C4IW_QP_STATE_CLOSING:
1315 if (!internal) {
1316 ret = -EINVAL;
1317 goto out;
1318 }
1319 switch (attrs->next_state) {
1320 case C4IW_QP_STATE_IDLE:
2f5b48c3
SW		 1321 flush_qp(qhp);
1322 set_state(qhp, C4IW_QP_STATE_IDLE);
cfdda9d7
SW		 1323 qhp->attr.llp_stream_handle = NULL;
1324 c4iw_put_ep(&qhp->ep->com);
1325 qhp->ep = NULL;
1326 wake_up(&qhp->wait);
1327 break;
1328 case C4IW_QP_STATE_ERROR:
1329 goto err;
1330 default:
1331 ret = -EINVAL;
1332 goto err;
1333 }
1334 break;
1335 case C4IW_QP_STATE_ERROR:
1336 if (attrs->next_state != C4IW_QP_STATE_IDLE) {
1337 ret = -EINVAL;
1338 goto out;
1339 }
1340 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) {
1341 ret = -EINVAL;
1342 goto out;
1343 }
2f5b48c3 1344 set_state(qhp, C4IW_QP_STATE_IDLE);
cfdda9d7
SW		 1345 break;
1346 case C4IW_QP_STATE_TERMINATE:
1347 if (!internal) {
1348 ret = -EINVAL;
1349 goto out;
1350 }
1351 goto err;
1352 break;
1353 default:
1354 printk(KERN_ERR "%s in a bad state %d\n",
1355 __func__, qhp->attr.state);
1356 ret = -EINVAL;
1357 goto err;
1358 break;
1359 }
1360 goto out;
1361err:
1362 PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
1363 qhp->wq.sq.qid);
1364
1365 /* disassociate the LLP connection */
1366 qhp->attr.llp_stream_handle = NULL;
af93fb5d
SW		 1367 if (!ep)
1368 ep = qhp->ep;
cfdda9d7 1369 qhp->ep = NULL;
2f5b48c3 1370 set_state(qhp, C4IW_QP_STATE_ERROR);
cfdda9d7
SW		 1371 free = 1;
1372 wake_up(&qhp->wait);
1373 BUG_ON(!ep);
2f5b48c3 1374 flush_qp(qhp);
cfdda9d7 1375out:
2f5b48c3 1376 mutex_unlock(&qhp->mutex);
cfdda9d7
SW		 1377
1378 if (terminate)
be4c9bad 1379 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL);
cfdda9d7
SW		 1380
1381 /*
1382 * If disconnect is 1, then we need to initiate a disconnect
1383 * on the EP. This can be a normal close (RTS->CLOSING) or
1384 * an abnormal close (RTS/CLOSING->ERROR).
1385 */
1386 if (disconnect) {
be4c9bad
RD		 1387 c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC :
1388 GFP_KERNEL);
cfdda9d7
SW		 1389 c4iw_put_ep(&ep->com);
1390 }
1391
1392 /*
1393 * If free is 1, then we've disassociated the EP from the QP
1394 * and we need to dereference the EP.
1395 */
1396 if (free)
1397 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 1398 PDBG("%s exit state %d\n", __func__, qhp->attr.state);
1399 return ret;
1400}
1401
422eea0a
VP		 1402static int enable_qp_db(int id, void *p, void *data)
1403{
1404 struct c4iw_qp *qp = p;
1405
1406 t4_enable_wq_db(&qp->wq);
1407 return 0;
1408}
1409
cfdda9d7
SW		 1410int c4iw_destroy_qp(struct ib_qp *ib_qp)
1411{
1412 struct c4iw_dev *rhp;
1413 struct c4iw_qp *qhp;
1414 struct c4iw_qp_attributes attrs;
1415 struct c4iw_ucontext *ucontext;
1416
1417 qhp = to_c4iw_qp(ib_qp);
1418 rhp = qhp->rhp;
1419
1420 attrs.next_state = C4IW_QP_STATE_ERROR;
d2fe99e8
KS		 1421 if (qhp->attr.state == C4IW_QP_STATE_TERMINATE)
1422 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1423 else
1424 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
cfdda9d7
SW		 1425 wait_event(qhp->wait, !qhp->ep);
1426
422eea0a
VP		 1427 spin_lock_irq(&rhp->lock);
1428 remove_handle_nolock(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1429 rhp->qpcnt--;
1430 BUG_ON(rhp->qpcnt < 0);
1431 if (rhp->qpcnt <= db_fc_threshold && rhp->db_state == FLOW_CONTROL) {
1432 rhp->rdev.stats.db_state_transitions++;
1433 rhp->db_state = NORMAL;
1434 idr_for_each(&rhp->qpidr, enable_qp_db, NULL);
1435 }
1436 spin_unlock_irq(&rhp->lock);
cfdda9d7
SW		 1437 atomic_dec(&qhp->refcnt);
1438 wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
1439
1440 ucontext = ib_qp->uobject ?
1441 to_c4iw_ucontext(ib_qp->uobject->context) : NULL;
1442 destroy_qp(&rhp->rdev, &qhp->wq,
1443 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1444
1445 PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid);
1446 kfree(qhp);
1447 return 0;
1448}
1449
422eea0a
VP		 1450static int disable_qp_db(int id, void *p, void *data)
1451{
1452 struct c4iw_qp *qp = p;
1453
1454 t4_disable_wq_db(&qp->wq);
1455 return 0;
1456}
1457
cfdda9d7
SW		 1458struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs,
1459 struct ib_udata *udata)
1460{
1461 struct c4iw_dev *rhp;
1462 struct c4iw_qp *qhp;
1463 struct c4iw_pd *php;
1464 struct c4iw_cq *schp;
1465 struct c4iw_cq *rchp;
1466 struct c4iw_create_qp_resp uresp;
1467 int sqsize, rqsize;
1468 struct c4iw_ucontext *ucontext;
1469 int ret;
c6d7b267 1470 struct c4iw_mm_entry *mm1, *mm2, *mm3, *mm4, *mm5 = NULL;
cfdda9d7
SW		 1471
1472 PDBG("%s ib_pd %p\n", __func__, pd);
1473
1474 if (attrs->qp_type != IB_QPT_RC)
1475 return ERR_PTR(-EINVAL);
1476
1477 php = to_c4iw_pd(pd);
1478 rhp = php->rhp;
1479 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid);
1480 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid);
1481 if (!schp || !rchp)
1482 return ERR_PTR(-EINVAL);
1483
1484 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE)
1485 return ERR_PTR(-EINVAL);
1486
1487 rqsize = roundup(attrs->cap.max_recv_wr + 1, 16);
1488 if (rqsize > T4_MAX_RQ_SIZE)
1489 return ERR_PTR(-E2BIG);
1490
1491 sqsize = roundup(attrs->cap.max_send_wr + 1, 16);
1492 if (sqsize > T4_MAX_SQ_SIZE)
1493 return ERR_PTR(-E2BIG);
1494
1495 ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL;
1496
1497
1498 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
1499 if (!qhp)
1500 return ERR_PTR(-ENOMEM);
1501 qhp->wq.sq.size = sqsize;
1502 qhp->wq.sq.memsize = (sqsize + 1) * sizeof *qhp->wq.sq.queue;
1503 qhp->wq.rq.size = rqsize;
1504 qhp->wq.rq.memsize = (rqsize + 1) * sizeof *qhp->wq.rq.queue;
1505
1506 if (ucontext) {
1507 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE);
1508 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE);
1509 }
1510
1511 PDBG("%s sqsize %u sqmemsize %zu rqsize %u rqmemsize %zu\n",
1512 __func__, sqsize, qhp->wq.sq.memsize, rqsize, qhp->wq.rq.memsize);
1513
1514 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq,
1515 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1516 if (ret)
1517 goto err1;
1518
1519 attrs->cap.max_recv_wr = rqsize - 1;
1520 attrs->cap.max_send_wr = sqsize - 1;
1521 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE;
1522
1523 qhp->rhp = rhp;
1524 qhp->attr.pd = php->pdid;
1525 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid;
1526 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid;
1527 qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
1528 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
1529 qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
1530 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
1531 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
1532 qhp->attr.state = C4IW_QP_STATE_IDLE;
1533 qhp->attr.next_state = C4IW_QP_STATE_IDLE;
1534 qhp->attr.enable_rdma_read = 1;
1535 qhp->attr.enable_rdma_write = 1;
1536 qhp->attr.enable_bind = 1;
1537 qhp->attr.max_ord = 1;
1538 qhp->attr.max_ird = 1;
1539 spin_lock_init(&qhp->lock);
2f5b48c3 1540 mutex_init(&qhp->mutex);
cfdda9d7
SW		 1541 init_waitqueue_head(&qhp->wait);
1542 atomic_set(&qhp->refcnt, 1);
1543
2c974781
VP		 1544 spin_lock_irq(&rhp->lock);
1545 if (rhp->db_state != NORMAL)
1546 t4_disable_wq_db(&qhp->wq);
422eea0a
VP		 1547 if (++rhp->qpcnt > db_fc_threshold && rhp->db_state == NORMAL) {
1548 rhp->rdev.stats.db_state_transitions++;
1549 rhp->db_state = FLOW_CONTROL;
1550 idr_for_each(&rhp->qpidr, disable_qp_db, NULL);
1551 }
2c974781
VP		 1552 ret = insert_handle_nolock(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid);
1553 spin_unlock_irq(&rhp->lock);
cfdda9d7
SW		 1554 if (ret)
1555 goto err2;
1556
cfdda9d7
SW		 1557 if (udata) {
1558 mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
1559 if (!mm1) {
1560 ret = -ENOMEM;
30a6a62f 1561 goto err3;
cfdda9d7
SW		 1562 }
1563 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
1564 if (!mm2) {
1565 ret = -ENOMEM;
30a6a62f 1566 goto err4;
cfdda9d7
SW		 1567 }
1568 mm3 = kmalloc(sizeof *mm3, GFP_KERNEL);
1569 if (!mm3) {
1570 ret = -ENOMEM;
30a6a62f 1571 goto err5;
cfdda9d7
SW		 1572 }
1573 mm4 = kmalloc(sizeof *mm4, GFP_KERNEL);
1574 if (!mm4) {
1575 ret = -ENOMEM;
30a6a62f 1576 goto err6;
cfdda9d7 1577 }
c6d7b267
SW		 1578 if (t4_sq_onchip(&qhp->wq.sq)) {
1579 mm5 = kmalloc(sizeof *mm5, GFP_KERNEL);
1580 if (!mm5) {
1581 ret = -ENOMEM;
1582 goto err7;
1583 }
1584 uresp.flags = C4IW_QPF_ONCHIP;
1585 } else
1586 uresp.flags = 0;
cfdda9d7
SW		 1587 uresp.qid_mask = rhp->rdev.qpmask;
1588 uresp.sqid = qhp->wq.sq.qid;
1589 uresp.sq_size = qhp->wq.sq.size;
1590 uresp.sq_memsize = qhp->wq.sq.memsize;
1591 uresp.rqid = qhp->wq.rq.qid;
1592 uresp.rq_size = qhp->wq.rq.size;
1593 uresp.rq_memsize = qhp->wq.rq.memsize;
1594 spin_lock(&ucontext->mmap_lock);
c6d7b267
SW		 1595 if (mm5) {
1596 uresp.ma_sync_key = ucontext->key;
1597 ucontext->key += PAGE_SIZE;
1598 }
cfdda9d7
SW		 1599 uresp.sq_key = ucontext->key;
1600 ucontext->key += PAGE_SIZE;
1601 uresp.rq_key = ucontext->key;
1602 ucontext->key += PAGE_SIZE;
1603 uresp.sq_db_gts_key = ucontext->key;
1604 ucontext->key += PAGE_SIZE;
1605 uresp.rq_db_gts_key = ucontext->key;
1606 ucontext->key += PAGE_SIZE;
1607 spin_unlock(&ucontext->mmap_lock);
1608 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp);
1609 if (ret)
c6d7b267 1610 goto err8;
cfdda9d7 1611 mm1->key = uresp.sq_key;
c6d7b267 1612 mm1->addr = qhp->wq.sq.phys_addr;
cfdda9d7
SW		 1613 mm1->len = PAGE_ALIGN(qhp->wq.sq.memsize);
1614 insert_mmap(ucontext, mm1);
1615 mm2->key = uresp.rq_key;
1616 mm2->addr = virt_to_phys(qhp->wq.rq.queue);
1617 mm2->len = PAGE_ALIGN(qhp->wq.rq.memsize);
1618 insert_mmap(ucontext, mm2);
1619 mm3->key = uresp.sq_db_gts_key;
1620 mm3->addr = qhp->wq.sq.udb;
1621 mm3->len = PAGE_SIZE;
1622 insert_mmap(ucontext, mm3);
1623 mm4->key = uresp.rq_db_gts_key;
1624 mm4->addr = qhp->wq.rq.udb;
1625 mm4->len = PAGE_SIZE;
1626 insert_mmap(ucontext, mm4);
c6d7b267
SW		 1627 if (mm5) {
1628 mm5->key = uresp.ma_sync_key;
1629 mm5->addr = (pci_resource_start(rhp->rdev.lldi.pdev, 0)
1630 + A_PCIE_MA_SYNC) & PAGE_MASK;
1631 mm5->len = PAGE_SIZE;
1632 insert_mmap(ucontext, mm5);
1633 }
cfdda9d7
SW		 1634 }
1635 qhp->ibqp.qp_num = qhp->wq.sq.qid;
1636 init_timer(&(qhp->timer));
1637 PDBG("%s qhp %p sq_num_entries %d, rq_num_entries %d qpid 0x%0x\n",
1638 __func__, qhp, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
1639 qhp->wq.sq.qid);
1640 return &qhp->ibqp;
c6d7b267
SW		 1641err8:
1642 kfree(mm5);
cfdda9d7 1643err7:
30a6a62f 1644 kfree(mm4);
cfdda9d7 1645err6:
30a6a62f 1646 kfree(mm3);
cfdda9d7 1647err5:
30a6a62f 1648 kfree(mm2);
cfdda9d7 1649err4:
30a6a62f 1650 kfree(mm1);
cfdda9d7
SW		 1651err3:
1652 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid);
1653err2:
1654 destroy_qp(&rhp->rdev, &qhp->wq,
1655 ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
1656err1:
1657 kfree(qhp);
1658 return ERR_PTR(ret);
1659}
1660
1661int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1662 int attr_mask, struct ib_udata *udata)
1663{
1664 struct c4iw_dev *rhp;
1665 struct c4iw_qp *qhp;
1666 enum c4iw_qp_attr_mask mask = 0;
1667 struct c4iw_qp_attributes attrs;
1668
1669 PDBG("%s ib_qp %p\n", __func__, ibqp);
1670
1671 /* iwarp does not support the RTR state */
1672 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
1673 attr_mask &= ~IB_QP_STATE;
1674
1675 /* Make sure we still have something left to do */
1676 if (!attr_mask)
1677 return 0;
1678
1679 memset(&attrs, 0, sizeof attrs);
1680 qhp = to_c4iw_qp(ibqp);
1681 rhp = qhp->rhp;
1682
1683 attrs.next_state = c4iw_convert_state(attr->qp_state);
1684 attrs.enable_rdma_read = (attr->qp_access_flags &
1685 IB_ACCESS_REMOTE_READ) ? 1 : 0;
1686 attrs.enable_rdma_write = (attr->qp_access_flags &
1687 IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
1688 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
1689
1690
1691 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0;
1692 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
1693 (C4IW_QP_ATTR_ENABLE_RDMA_READ |
1694 C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
1695 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0;
1696
2c974781
VP		 1697 /*
1698 * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for
1699 * ringing the queue db when we're in DB_FULL mode.
1700 */
1701 attrs.sq_db_inc = attr->sq_psn;
1702 attrs.rq_db_inc = attr->rq_psn;
1703 mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0;
1704 mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0;
1705
cfdda9d7
SW		 1706 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0);
1707}
1708
1709struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn)
1710{
1711 PDBG("%s ib_dev %p qpn 0x%x\n", __func__, dev, qpn);
1712 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn);
1713}
Linux 6.x block layer and io_uring tree(s)