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Merge branch 'sh/for-2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...
[mirror_ubuntu-bionic-kernel.git] / drivers / infiniband / hw / cxgb3 / iwch_qp.c
CommitLineData
b038ced7
SW		 1/*
2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
b038ced7
SW		 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 "iwch_provider.h"
33#include "iwch.h"
34#include "iwch_cm.h"
35#include "cxio_hal.h"
4ab928f6 36#include "cxio_resource.h"
b038ced7
SW		 37
38#define NO_SUPPORT -1
39
4ab928f6 40static int build_rdma_send(union t3_wr *wqe, struct ib_send_wr *wr,
2b540355 41 u8 * flit_cnt)
b038ced7
SW		 42{
43 int i;
44 u32 plen;
45
46 switch (wr->opcode) {
47 case IB_WR_SEND:
b038ced7
SW		 48 if (wr->send_flags & IB_SEND_SOLICITED)
49 wqe->send.rdmaop = T3_SEND_WITH_SE;
50 else
51 wqe->send.rdmaop = T3_SEND;
52 wqe->send.rem_stag = 0;
53 break;
e7e55829
SW		 54 case IB_WR_SEND_WITH_INV:
55 if (wr->send_flags & IB_SEND_SOLICITED)
56 wqe->send.rdmaop = T3_SEND_WITH_SE_INV;
57 else
58 wqe->send.rdmaop = T3_SEND_WITH_INV;
59 wqe->send.rem_stag = cpu_to_be32(wr->ex.invalidate_rkey);
b038ced7 60 break;
b038ced7 61 default:
e7e55829 62 return -EINVAL;
b038ced7
SW		 63 }
64 if (wr->num_sge > T3_MAX_SGE)
65 return -EINVAL;
66 wqe->send.reserved[0] = 0;
67 wqe->send.reserved[1] = 0;
68 wqe->send.reserved[2] = 0;
e7e55829
SW		 69 plen = 0;
70 for (i = 0; i < wr->num_sge; i++) {
71 if ((plen + wr->sg_list[i].length) < plen)
72 return -EMSGSIZE;
73
74 plen += wr->sg_list[i].length;
75 wqe->send.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
76 wqe->send.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
77 wqe->send.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
b038ced7 78 }
e7e55829
SW		 79 wqe->send.num_sgle = cpu_to_be32(wr->num_sge);
80 *flit_cnt = 4 + ((wr->num_sge) << 1);
b038ced7
SW		 81 wqe->send.plen = cpu_to_be32(plen);
82 return 0;
83}
84
4ab928f6 85static int build_rdma_write(union t3_wr *wqe, struct ib_send_wr *wr,
2b540355 86 u8 *flit_cnt)
b038ced7
SW		 87{
88 int i;
89 u32 plen;
90 if (wr->num_sge > T3_MAX_SGE)
91 return -EINVAL;
92 wqe->write.rdmaop = T3_RDMA_WRITE;
93 wqe->write.reserved[0] = 0;
94 wqe->write.reserved[1] = 0;
95 wqe->write.reserved[2] = 0;
96 wqe->write.stag_sink = cpu_to_be32(wr->wr.rdma.rkey);
97 wqe->write.to_sink = cpu_to_be64(wr->wr.rdma.remote_addr);
98
99 if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
100 plen = 4;
0f39cf3d 101 wqe->write.sgl[0].stag = wr->ex.imm_data;
b038ced7
SW		 102 wqe->write.sgl[0].len = __constant_cpu_to_be32(0);
103 wqe->write.num_sgle = __constant_cpu_to_be32(0);
104 *flit_cnt = 6;
105 } else {
106 plen = 0;
107 for (i = 0; i < wr->num_sge; i++) {
108 if ((plen + wr->sg_list[i].length) < plen) {
109 return -EMSGSIZE;
110 }
111 plen += wr->sg_list[i].length;
112 wqe->write.sgl[i].stag =
113 cpu_to_be32(wr->sg_list[i].lkey);
114 wqe->write.sgl[i].len =
115 cpu_to_be32(wr->sg_list[i].length);
116 wqe->write.sgl[i].to =
117 cpu_to_be64(wr->sg_list[i].addr);
118 }
119 wqe->write.num_sgle = cpu_to_be32(wr->num_sge);
120 *flit_cnt = 5 + ((wr->num_sge) << 1);
121 }
122 wqe->write.plen = cpu_to_be32(plen);
123 return 0;
124}
125
4ab928f6 126static int build_rdma_read(union t3_wr *wqe, struct ib_send_wr *wr,
2b540355 127 u8 *flit_cnt)
b038ced7
SW		 128{
129 if (wr->num_sge > 1)
130 return -EINVAL;
131 wqe->read.rdmaop = T3_READ_REQ;
e7e55829
SW		 132 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV)
133 wqe->read.local_inv = 1;
134 else
135 wqe->read.local_inv = 0;
b038ced7
SW		 136 wqe->read.reserved[0] = 0;
137 wqe->read.reserved[1] = 0;
b038ced7
SW		 138 wqe->read.rem_stag = cpu_to_be32(wr->wr.rdma.rkey);
139 wqe->read.rem_to = cpu_to_be64(wr->wr.rdma.remote_addr);
140 wqe->read.local_stag = cpu_to_be32(wr->sg_list[0].lkey);
141 wqe->read.local_len = cpu_to_be32(wr->sg_list[0].length);
142 wqe->read.local_to = cpu_to_be64(wr->sg_list[0].addr);
143 *flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
144 return 0;
145}
146
4ab928f6 147static int build_fastreg(union t3_wr *wqe, struct ib_send_wr *wr,
e7e55829
SW		 148 u8 *flit_cnt, int *wr_cnt, struct t3_wq *wq)
149{
150 int i;
151 __be64 *p;
152
153 if (wr->wr.fast_reg.page_list_len > T3_MAX_FASTREG_DEPTH)
154 return -EINVAL;
155 *wr_cnt = 1;
156 wqe->fastreg.stag = cpu_to_be32(wr->wr.fast_reg.rkey);
157 wqe->fastreg.len = cpu_to_be32(wr->wr.fast_reg.length);
158 wqe->fastreg.va_base_hi = cpu_to_be32(wr->wr.fast_reg.iova_start >> 32);
159 wqe->fastreg.va_base_lo_fbo =
160 cpu_to_be32(wr->wr.fast_reg.iova_start & 0xffffffff);
161 wqe->fastreg.page_type_perms = cpu_to_be32(
162 V_FR_PAGE_COUNT(wr->wr.fast_reg.page_list_len) |
163 V_FR_PAGE_SIZE(wr->wr.fast_reg.page_shift-12) |
164 V_FR_TYPE(TPT_VATO) |
165 V_FR_PERMS(iwch_ib_to_tpt_access(wr->wr.fast_reg.access_flags)));
166 p = &wqe->fastreg.pbl_addrs[0];
167 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++, p++) {
168
169 /* If we need a 2nd WR, then set it up */
170 if (i == T3_MAX_FASTREG_FRAG) {
171 *wr_cnt = 2;
172 wqe = (union t3_wr *)(wq->queue +
173 Q_PTR2IDX((wq->wptr+1), wq->size_log2));
174 build_fw_riwrh((void *)wqe, T3_WR_FASTREG, 0,
175 Q_GENBIT(wq->wptr + 1, wq->size_log2),
176 0, 1 + wr->wr.fast_reg.page_list_len - T3_MAX_FASTREG_FRAG,
177 T3_EOP);
178
179 p = &wqe->pbl_frag.pbl_addrs[0];
180 }
181 *p = cpu_to_be64((u64)wr->wr.fast_reg.page_list->page_list[i]);
182 }
183 *flit_cnt = 5 + wr->wr.fast_reg.page_list_len;
184 if (*flit_cnt > 15)
185 *flit_cnt = 15;
186 return 0;
187}
188
4ab928f6 189static int build_inv_stag(union t3_wr *wqe, struct ib_send_wr *wr,
e7e55829
SW		 190 u8 *flit_cnt)
191{
192 wqe->local_inv.stag = cpu_to_be32(wr->ex.invalidate_rkey);
193 wqe->local_inv.reserved = 0;
194 *flit_cnt = sizeof(struct t3_local_inv_wr) >> 3;
195 return 0;
196}
197
b038ced7
SW		 198/*
199 * TBD: this is going to be moved to firmware. Missing pdid/qpid check for now.
200 */
2b540355
AB		 201static int iwch_sgl2pbl_map(struct iwch_dev *rhp, struct ib_sge *sg_list,
202 u32 num_sgle, u32 * pbl_addr, u8 * page_size)
b038ced7
SW		 203{
204 int i;
205 struct iwch_mr *mhp;
206 u32 offset;
207 for (i = 0; i < num_sgle; i++) {
208
209 mhp = get_mhp(rhp, (sg_list[i].lkey) >> 8);
210 if (!mhp) {
33718363 211 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 212 return -EIO;
213 }
214 if (!mhp->attr.state) {
33718363 215 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 216 return -EIO;
217 }
218 if (mhp->attr.zbva) {
33718363 219 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 220 return -EIO;
221 }
222
223 if (sg_list[i].addr < mhp->attr.va_fbo) {
33718363 224 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 225 return -EINVAL;
226 }
227 if (sg_list[i].addr + ((u64) sg_list[i].length) <
228 sg_list[i].addr) {
33718363 229 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 230 return -EINVAL;
231 }
232 if (sg_list[i].addr + ((u64) sg_list[i].length) >
233 mhp->attr.va_fbo + ((u64) mhp->attr.len)) {
33718363 234 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 235 return -EINVAL;
236 }
237 offset = sg_list[i].addr - mhp->attr.va_fbo;
238 offset += ((u32) mhp->attr.va_fbo) %
239 (1UL << (12 + mhp->attr.page_size));
240 pbl_addr[i] = ((mhp->attr.pbl_addr -
241 rhp->rdev.rnic_info.pbl_base) >> 3) +
242 (offset >> (12 + mhp->attr.page_size));
243 page_size[i] = mhp->attr.page_size;
244 }
245 return 0;
246}
247
4ab928f6 248static int build_rdma_recv(struct iwch_qp *qhp, union t3_wr *wqe,
2b540355 249 struct ib_recv_wr *wr)
b038ced7 250{
4ab928f6
SW		 251 int i, err = 0;
252 u32 pbl_addr[T3_MAX_SGE];
253 u8 page_size[T3_MAX_SGE];
254
255 err = iwch_sgl2pbl_map(qhp->rhp, wr->sg_list, wr->num_sge, pbl_addr,
256 page_size);
257 if (err)
258 return err;
259 wqe->recv.pagesz[0] = page_size[0];
260 wqe->recv.pagesz[1] = page_size[1];
261 wqe->recv.pagesz[2] = page_size[2];
262 wqe->recv.pagesz[3] = page_size[3];
b038ced7
SW		 263 wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
264 for (i = 0; i < wr->num_sge; i++) {
265 wqe->recv.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
266 wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
4ab928f6
SW		 267
268 /* to in the WQE == the offset into the page */
269 wqe->recv.sgl[i].to = cpu_to_be64(((u32) wr->sg_list[i].addr) %
270 (1UL << (12 + page_size[i])));
271
272 /* pbl_addr is the adapters address in the PBL */
273 wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_addr[i]);
274 }
275 for (; i < T3_MAX_SGE; i++) {
276 wqe->recv.sgl[i].stag = 0;
277 wqe->recv.sgl[i].len = 0;
278 wqe->recv.sgl[i].to = 0;
279 wqe->recv.pbl_addr[i] = 0;
280 }
281 qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
282 qhp->wq.rq_size_log2)].wr_id = wr->wr_id;
283 qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
284 qhp->wq.rq_size_log2)].pbl_addr = 0;
285 return 0;
286}
287
288static int build_zero_stag_recv(struct iwch_qp *qhp, union t3_wr *wqe,
289 struct ib_recv_wr *wr)
290{
291 int i;
292 u32 pbl_addr;
293 u32 pbl_offset;
294
295
296 /*
297 * The T3 HW requires the PBL in the HW recv descriptor to reference
298 * a PBL entry. So we allocate the max needed PBL memory here and pass
299 * it to the uP in the recv WR. The uP will build the PBL and setup
300 * the HW recv descriptor.
301 */
302 pbl_addr = cxio_hal_pblpool_alloc(&qhp->rhp->rdev, T3_STAG0_PBL_SIZE);
303 if (!pbl_addr)
304 return -ENOMEM;
305
306 /*
307 * Compute the 8B aligned offset.
308 */
309 pbl_offset = (pbl_addr - qhp->rhp->rdev.rnic_info.pbl_base) >> 3;
310
311 wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
312
313 for (i = 0; i < wr->num_sge; i++) {
314
315 /*
316 * Use a 128MB page size. This and an imposed 128MB
317 * sge length limit allows us to require only a 2-entry HW
318 * PBL for each SGE. This restriction is acceptable since
319 * since it is not possible to allocate 128MB of contiguous
320 * DMA coherent memory!
321 */
322 if (wr->sg_list[i].length > T3_STAG0_MAX_PBE_LEN)
323 return -EINVAL;
324 wqe->recv.pagesz[i] = T3_STAG0_PAGE_SHIFT;
325
326 /*
327 * T3 restricts a recv to all zero-stag or all non-zero-stag.
328 */
329 if (wr->sg_list[i].lkey != 0)
330 return -EINVAL;
331 wqe->recv.sgl[i].stag = 0;
332 wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
457fe7b8 333 wqe->recv.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
4ab928f6
SW		 334 wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_offset);
335 pbl_offset += 2;
b038ced7
SW		 336 }
337 for (; i < T3_MAX_SGE; i++) {
4ab928f6 338 wqe->recv.pagesz[i] = 0;
b038ced7
SW		 339 wqe->recv.sgl[i].stag = 0;
340 wqe->recv.sgl[i].len = 0;
341 wqe->recv.sgl[i].to = 0;
4ab928f6 342 wqe->recv.pbl_addr[i] = 0;
b038ced7 343 }
4ab928f6
SW		 344 qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
345 qhp->wq.rq_size_log2)].wr_id = wr->wr_id;
346 qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
347 qhp->wq.rq_size_log2)].pbl_addr = pbl_addr;
b038ced7
SW		 348 return 0;
349}
350
351int iwch_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
352 struct ib_send_wr **bad_wr)
353{
354 int err = 0;
21609ae3 355 u8 uninitialized_var(t3_wr_flit_cnt);
b038ced7
SW		 356 enum t3_wr_opcode t3_wr_opcode = 0;
357 enum t3_wr_flags t3_wr_flags;
358 struct iwch_qp *qhp;
359 u32 idx;
360 union t3_wr *wqe;
361 u32 num_wrs;
362 unsigned long flag;
363 struct t3_swsq *sqp;
e7e55829 364 int wr_cnt = 1;
b038ced7
SW		 365
366 qhp = to_iwch_qp(ibqp);
367 spin_lock_irqsave(&qhp->lock, flag);
368 if (qhp->attr.state > IWCH_QP_STATE_RTS) {
369 spin_unlock_irqrestore(&qhp->lock, flag);
370 return -EINVAL;
371 }
372 num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
373 qhp->wq.sq_size_log2);
374 if (num_wrs <= 0) {
375 spin_unlock_irqrestore(&qhp->lock, flag);
376 return -ENOMEM;
377 }
378 while (wr) {
379 if (num_wrs == 0) {
380 err = -ENOMEM;
381 *bad_wr = wr;
382 break;
383 }
384 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
385 wqe = (union t3_wr *) (qhp->wq.queue + idx);
386 t3_wr_flags = 0;
387 if (wr->send_flags & IB_SEND_SOLICITED)
388 t3_wr_flags |= T3_SOLICITED_EVENT_FLAG;
b038ced7
SW		 389 if (wr->send_flags & IB_SEND_SIGNALED)
390 t3_wr_flags |= T3_COMPLETION_FLAG;
391 sqp = qhp->wq.sq +
392 Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
393 switch (wr->opcode) {
394 case IB_WR_SEND:
e7e55829
SW		 395 case IB_WR_SEND_WITH_INV:
396 if (wr->send_flags & IB_SEND_FENCE)
397 t3_wr_flags |= T3_READ_FENCE_FLAG;
b038ced7 398 t3_wr_opcode = T3_WR_SEND;
4ab928f6 399 err = build_rdma_send(wqe, wr, &t3_wr_flit_cnt);
b038ced7
SW		 400 break;
401 case IB_WR_RDMA_WRITE:
402 case IB_WR_RDMA_WRITE_WITH_IMM:
403 t3_wr_opcode = T3_WR_WRITE;
4ab928f6 404 err = build_rdma_write(wqe, wr, &t3_wr_flit_cnt);
b038ced7
SW		 405 break;
406 case IB_WR_RDMA_READ:
e7e55829 407 case IB_WR_RDMA_READ_WITH_INV:
b038ced7
SW		 408 t3_wr_opcode = T3_WR_READ;
409 t3_wr_flags = 0; /* T3 reads are always signaled */
4ab928f6 410 err = build_rdma_read(wqe, wr, &t3_wr_flit_cnt);
b038ced7
SW		 411 if (err)
412 break;
413 sqp->read_len = wqe->read.local_len;
414 if (!qhp->wq.oldest_read)
415 qhp->wq.oldest_read = sqp;
416 break;
e7e55829
SW		 417 case IB_WR_FAST_REG_MR:
418 t3_wr_opcode = T3_WR_FASTREG;
4ab928f6 419 err = build_fastreg(wqe, wr, &t3_wr_flit_cnt,
e7e55829
SW		 420 &wr_cnt, &qhp->wq);
421 break;
422 case IB_WR_LOCAL_INV:
423 if (wr->send_flags & IB_SEND_FENCE)
424 t3_wr_flags |= T3_LOCAL_FENCE_FLAG;
425 t3_wr_opcode = T3_WR_INV_STAG;
4ab928f6 426 err = build_inv_stag(wqe, wr, &t3_wr_flit_cnt);
e7e55829 427 break;
b038ced7 428 default:
33718363 429 PDBG("%s post of type=%d TBD!\n", __func__,
b038ced7
SW		 430 wr->opcode);
431 err = -EINVAL;
432 }
433 if (err) {
434 *bad_wr = wr;
435 break;
436 }
437 wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
438 sqp->wr_id = wr->wr_id;
439 sqp->opcode = wr2opcode(t3_wr_opcode);
440 sqp->sq_wptr = qhp->wq.sq_wptr;
441 sqp->complete = 0;
442 sqp->signaled = (wr->send_flags & IB_SEND_SIGNALED);
443
444 build_fw_riwrh((void *) wqe, t3_wr_opcode, t3_wr_flags,
445 Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
e7e55829
SW		 446 0, t3_wr_flit_cnt,
447 (wr_cnt == 1) ? T3_SOPEOP : T3_SOP);
b038ced7 448 PDBG("%s cookie 0x%llx wq idx 0x%x swsq idx %ld opcode %d\n",
33718363 449 __func__, (unsigned long long) wr->wr_id, idx,
b038ced7
SW		 450 Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2),
451 sqp->opcode);
452 wr = wr->next;
453 num_wrs--;
e7e55829 454 qhp->wq.wptr += wr_cnt;
b038ced7
SW		 455 ++(qhp->wq.sq_wptr);
456 }
457 spin_unlock_irqrestore(&qhp->lock, flag);
458 ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
459 return err;
460}
461
462int iwch_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
463 struct ib_recv_wr **bad_wr)
464{
465 int err = 0;
466 struct iwch_qp *qhp;
467 u32 idx;
468 union t3_wr *wqe;
469 u32 num_wrs;
470 unsigned long flag;
471
472 qhp = to_iwch_qp(ibqp);
473 spin_lock_irqsave(&qhp->lock, flag);
474 if (qhp->attr.state > IWCH_QP_STATE_RTS) {
475 spin_unlock_irqrestore(&qhp->lock, flag);
476 return -EINVAL;
477 }
478 num_wrs = Q_FREECNT(qhp->wq.rq_rptr, qhp->wq.rq_wptr,
479 qhp->wq.rq_size_log2) - 1;
480 if (!wr) {
481 spin_unlock_irqrestore(&qhp->lock, flag);
482 return -EINVAL;
483 }
484 while (wr) {
4ab928f6
SW		 485 if (wr->num_sge > T3_MAX_SGE) {
486 err = -EINVAL;
487 *bad_wr = wr;
488 break;
489 }
b038ced7
SW		 490 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
491 wqe = (union t3_wr *) (qhp->wq.queue + idx);
492 if (num_wrs)
4ab928f6
SW		 493 if (wr->sg_list[0].lkey)
494 err = build_rdma_recv(qhp, wqe, wr);
495 else
496 err = build_zero_stag_recv(qhp, wqe, wr);
b038ced7
SW		 497 else
498 err = -ENOMEM;
499 if (err) {
500 *bad_wr = wr;
501 break;
502 }
b038ced7
SW		 503 build_fw_riwrh((void *) wqe, T3_WR_RCV, T3_COMPLETION_FLAG,
504 Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
e7e55829 505 0, sizeof(struct t3_receive_wr) >> 3, T3_SOPEOP);
b038ced7 506 PDBG("%s cookie 0x%llx idx 0x%x rq_wptr 0x%x rw_rptr 0x%x "
33718363 507 "wqe %p \n", __func__, (unsigned long long) wr->wr_id,
b038ced7
SW		 508 idx, qhp->wq.rq_wptr, qhp->wq.rq_rptr, wqe);
509 ++(qhp->wq.rq_wptr);
510 ++(qhp->wq.wptr);
511 wr = wr->next;
512 num_wrs--;
513 }
514 spin_unlock_irqrestore(&qhp->lock, flag);
515 ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
516 return err;
517}
518
519int iwch_bind_mw(struct ib_qp *qp,
520 struct ib_mw *mw,
521 struct ib_mw_bind *mw_bind)
522{
523 struct iwch_dev *rhp;
524 struct iwch_mw *mhp;
525 struct iwch_qp *qhp;
526 union t3_wr *wqe;
527 u32 pbl_addr;
528 u8 page_size;
529 u32 num_wrs;
530 unsigned long flag;
531 struct ib_sge sgl;
532 int err=0;
533 enum t3_wr_flags t3_wr_flags;
534 u32 idx;
535 struct t3_swsq *sqp;
536
537 qhp = to_iwch_qp(qp);
538 mhp = to_iwch_mw(mw);
539 rhp = qhp->rhp;
540
541 spin_lock_irqsave(&qhp->lock, flag);
542 if (qhp->attr.state > IWCH_QP_STATE_RTS) {
543 spin_unlock_irqrestore(&qhp->lock, flag);
544 return -EINVAL;
545 }
546 num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
547 qhp->wq.sq_size_log2);
548 if ((num_wrs) <= 0) {
549 spin_unlock_irqrestore(&qhp->lock, flag);
550 return -ENOMEM;
551 }
552 idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
33718363 553 PDBG("%s: idx 0x%0x, mw 0x%p, mw_bind 0x%p\n", __func__, idx,
b038ced7
SW		 554 mw, mw_bind);
555 wqe = (union t3_wr *) (qhp->wq.queue + idx);
556
557 t3_wr_flags = 0;
558 if (mw_bind->send_flags & IB_SEND_SIGNALED)
559 t3_wr_flags = T3_COMPLETION_FLAG;
560
561 sgl.addr = mw_bind->addr;
562 sgl.lkey = mw_bind->mr->lkey;
563 sgl.length = mw_bind->length;
564 wqe->bind.reserved = 0;
e7e55829 565 wqe->bind.type = TPT_VATO;
b038ced7
SW		 566
567 /* TBD: check perms */
1c355a6e 568 wqe->bind.perms = iwch_ib_to_tpt_bind_access(mw_bind->mw_access_flags);
b038ced7
SW		 569 wqe->bind.mr_stag = cpu_to_be32(mw_bind->mr->lkey);
570 wqe->bind.mw_stag = cpu_to_be32(mw->rkey);
571 wqe->bind.mw_len = cpu_to_be32(mw_bind->length);
572 wqe->bind.mw_va = cpu_to_be64(mw_bind->addr);
573 err = iwch_sgl2pbl_map(rhp, &sgl, 1, &pbl_addr, &page_size);
574 if (err) {
575 spin_unlock_irqrestore(&qhp->lock, flag);
e7e55829 576 return err;
b038ced7
SW		 577 }
578 wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
579 sqp = qhp->wq.sq + Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
580 sqp->wr_id = mw_bind->wr_id;
581 sqp->opcode = T3_BIND_MW;
582 sqp->sq_wptr = qhp->wq.sq_wptr;
583 sqp->complete = 0;
584 sqp->signaled = (mw_bind->send_flags & IB_SEND_SIGNALED);
585 wqe->bind.mr_pbl_addr = cpu_to_be32(pbl_addr);
586 wqe->bind.mr_pagesz = page_size;
b038ced7
SW		 587 build_fw_riwrh((void *)wqe, T3_WR_BIND, t3_wr_flags,
588 Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2), 0,
e7e55829 589 sizeof(struct t3_bind_mw_wr) >> 3, T3_SOPEOP);
b038ced7
SW		 590 ++(qhp->wq.wptr);
591 ++(qhp->wq.sq_wptr);
592 spin_unlock_irqrestore(&qhp->lock, flag);
593
594 ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
595
596 return err;
597}
598
4a97d47e
SW		 599static inline void build_term_codes(struct respQ_msg_t *rsp_msg,
600 u8 *layer_type, u8 *ecode)
b038ced7 601{
4a97d47e
SW		 602 int status = TPT_ERR_INTERNAL_ERR;
603 int tagged = 0;
604 int opcode = -1;
605 int rqtype = 0;
606 int send_inv = 0;
607
608 if (rsp_msg) {
609 status = CQE_STATUS(rsp_msg->cqe);
610 opcode = CQE_OPCODE(rsp_msg->cqe);
611 rqtype = RQ_TYPE(rsp_msg->cqe);
612 send_inv = (opcode == T3_SEND_WITH_INV) ||
613 (opcode == T3_SEND_WITH_SE_INV);
614 tagged = (opcode == T3_RDMA_WRITE) ||
615 (rqtype && (opcode == T3_READ_RESP));
616 }
617
618 switch (status) {
b038ced7 619 case TPT_ERR_STAG:
4a97d47e
SW		 620 if (send_inv) {
621 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
622 *ecode = RDMAP_CANT_INV_STAG;
623 } else {
b038ced7
SW		 624 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
625 *ecode = RDMAP_INV_STAG;
626 }
627 break;
628 case TPT_ERR_PDID:
4a97d47e
SW		 629 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
630 if ((opcode == T3_SEND_WITH_INV) ||
631 (opcode == T3_SEND_WITH_SE_INV))
632 *ecode = RDMAP_CANT_INV_STAG;
633 else
634 *ecode = RDMAP_STAG_NOT_ASSOC;
635 break;
b038ced7 636 case TPT_ERR_QPID:
4a97d47e
SW		 637 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
638 *ecode = RDMAP_STAG_NOT_ASSOC;
639 break;
b038ced7 640 case TPT_ERR_ACCESS:
4a97d47e
SW		 641 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
642 *ecode = RDMAP_ACC_VIOL;
b038ced7
SW		 643 break;
644 case TPT_ERR_WRAP:
645 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
646 *ecode = RDMAP_TO_WRAP;
647 break;
648 case TPT_ERR_BOUND:
4a97d47e 649 if (tagged) {
b038ced7
SW		 650 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
651 *ecode = DDPT_BASE_BOUNDS;
4a97d47e 652 } else {
b038ced7
SW		 653 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
654 *ecode = RDMAP_BASE_BOUNDS;
b038ced7
SW		 655 }
656 break;
657 case TPT_ERR_INVALIDATE_SHARED_MR:
658 case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
659 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
660 *ecode = RDMAP_CANT_INV_STAG;
661 break;
662 case TPT_ERR_ECC:
663 case TPT_ERR_ECC_PSTAG:
664 case TPT_ERR_INTERNAL_ERR:
665 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
666 *ecode = 0;
667 break;
668 case TPT_ERR_OUT_OF_RQE:
669 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
670 *ecode = DDPU_INV_MSN_NOBUF;
671 break;
672 case TPT_ERR_PBL_ADDR_BOUND:
673 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
674 *ecode = DDPT_BASE_BOUNDS;
675 break;
676 case TPT_ERR_CRC:
677 *layer_type = LAYER_MPA|DDP_LLP;
678 *ecode = MPA_CRC_ERR;
679 break;
680 case TPT_ERR_MARKER:
681 *layer_type = LAYER_MPA|DDP_LLP;
682 *ecode = MPA_MARKER_ERR;
683 break;
684 case TPT_ERR_PDU_LEN_ERR:
685 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
686 *ecode = DDPU_MSG_TOOBIG;
687 break;
688 case TPT_ERR_DDP_VERSION:
689 if (tagged) {
690 *layer_type = LAYER_DDP|DDP_TAGGED_ERR;
691 *ecode = DDPT_INV_VERS;
692 } else {
693 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
694 *ecode = DDPU_INV_VERS;
695 }
696 break;
697 case TPT_ERR_RDMA_VERSION:
698 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
699 *ecode = RDMAP_INV_VERS;
700 break;
701 case TPT_ERR_OPCODE:
702 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
703 *ecode = RDMAP_INV_OPCODE;
704 break;
705 case TPT_ERR_DDP_QUEUE_NUM:
706 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
707 *ecode = DDPU_INV_QN;
708 break;
709 case TPT_ERR_MSN:
710 case TPT_ERR_MSN_GAP:
711 case TPT_ERR_MSN_RANGE:
712 case TPT_ERR_IRD_OVERFLOW:
713 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
714 *ecode = DDPU_INV_MSN_RANGE;
715 break;
716 case TPT_ERR_TBIT:
717 *layer_type = LAYER_DDP|DDP_LOCAL_CATA;
718 *ecode = 0;
719 break;
720 case TPT_ERR_MO:
721 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
722 *ecode = DDPU_INV_MO;
723 break;
724 default:
725 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
726 *ecode = 0;
727 break;
728 }
729}
730
f8b0dfd1
SW		 731int iwch_post_zb_read(struct iwch_qp *qhp)
732{
733 union t3_wr *wqe;
734 struct sk_buff *skb;
735 u8 flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
736
737 PDBG("%s enter\n", __func__);
738 skb = alloc_skb(40, GFP_KERNEL);
739 if (!skb) {
740 printk(KERN_ERR "%s cannot send zb_read!!\n", __func__);
741 return -ENOMEM;
742 }
743 wqe = (union t3_wr *)skb_put(skb, sizeof(struct t3_rdma_read_wr));
744 memset(wqe, 0, sizeof(struct t3_rdma_read_wr));
745 wqe->read.rdmaop = T3_READ_REQ;
746 wqe->read.reserved[0] = 0;
747 wqe->read.reserved[1] = 0;
f8b0dfd1
SW		 748 wqe->read.rem_stag = cpu_to_be32(1);
749 wqe->read.rem_to = cpu_to_be64(1);
750 wqe->read.local_stag = cpu_to_be32(1);
751 wqe->read.local_len = cpu_to_be32(0);
752 wqe->read.local_to = cpu_to_be64(1);
753 wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_READ));
754 wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid)|
755 V_FW_RIWR_LEN(flit_cnt));
756 skb->priority = CPL_PRIORITY_DATA;
757 return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
758}
759
b038ced7
SW		 760/*
761 * This posts a TERMINATE with layer=RDMA, type=catastrophic.
762 */
763int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg)
764{
765 union t3_wr *wqe;
766 struct terminate_message *term;
b038ced7
SW		 767 struct sk_buff *skb;
768
33718363 769 PDBG("%s %d\n", __func__, __LINE__);
b038ced7
SW		 770 skb = alloc_skb(40, GFP_ATOMIC);
771 if (!skb) {
33718363 772 printk(KERN_ERR "%s cannot send TERMINATE!\n", __func__);
b038ced7
SW		 773 return -ENOMEM;
774 }
775 wqe = (union t3_wr *)skb_put(skb, 40);
776 memset(wqe, 0, 40);
777 wqe->send.rdmaop = T3_TERMINATE;
778
779 /* immediate data length */
780 wqe->send.plen = htonl(4);
781
782 /* immediate data starts here. */
783 term = (struct terminate_message *)wqe->send.sgl;
4a97d47e 784 build_term_codes(rsp_msg, &term->layer_etype, &term->ecode);
fb497d72
SW		 785 wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_SEND) |
786 V_FW_RIWR_FLAGS(T3_COMPLETION_FLAG | T3_NOTIFY_FLAG));
787 wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid));
b038ced7
SW		 788 skb->priority = CPL_PRIORITY_DATA;
789 return cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
790}
791
792/*
793 * Assumes qhp lock is held.
794 */
795static void __flush_qp(struct iwch_qp *qhp, unsigned long *flag)
796{
797 struct iwch_cq *rchp, *schp;
798 int count;
c8286944 799 int flushed;
b038ced7
SW		 800
801 rchp = get_chp(qhp->rhp, qhp->attr.rcq);
802 schp = get_chp(qhp->rhp, qhp->attr.scq);
803
33718363 804 PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
b038ced7
SW		 805 /* take a ref on the qhp since we must release the lock */
806 atomic_inc(&qhp->refcnt);
807 spin_unlock_irqrestore(&qhp->lock, *flag);
808
809 /* locking heirarchy: cq lock first, then qp lock. */
810 spin_lock_irqsave(&rchp->lock, *flag);
811 spin_lock(&qhp->lock);
812 cxio_flush_hw_cq(&rchp->cq);
813 cxio_count_rcqes(&rchp->cq, &qhp->wq, &count);
c8286944 814 flushed = cxio_flush_rq(&qhp->wq, &rchp->cq, count);
b038ced7
SW		 815 spin_unlock(&qhp->lock);
816 spin_unlock_irqrestore(&rchp->lock, *flag);
c8286944
SW		 817 if (flushed)
818 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
b038ced7
SW		 819
820 /* locking heirarchy: cq lock first, then qp lock. */
821 spin_lock_irqsave(&schp->lock, *flag);
822 spin_lock(&qhp->lock);
823 cxio_flush_hw_cq(&schp->cq);
824 cxio_count_scqes(&schp->cq, &qhp->wq, &count);
c8286944 825 flushed = cxio_flush_sq(&qhp->wq, &schp->cq, count);
b038ced7
SW		 826 spin_unlock(&qhp->lock);
827 spin_unlock_irqrestore(&schp->lock, *flag);
c8286944
SW		 828 if (flushed)
829 (*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
b038ced7
SW		 830
831 /* deref */
832 if (atomic_dec_and_test(&qhp->refcnt))
833 wake_up(&qhp->wait);
834
835 spin_lock_irqsave(&qhp->lock, *flag);
836}
837
2b540355 838static void flush_qp(struct iwch_qp *qhp, unsigned long *flag)
b038ced7 839{
856b5925 840 if (qhp->ibqp.uobject)
b038ced7
SW		 841 cxio_set_wq_in_error(&qhp->wq);
842 else
843 __flush_qp(qhp, flag);
844}
845
846
847/*
f8b0dfd1 848 * Return count of RECV WRs posted
b038ced7 849 */
f8b0dfd1 850u16 iwch_rqes_posted(struct iwch_qp *qhp)
b038ced7 851{
f8b0dfd1
SW		 852 union t3_wr *wqe = qhp->wq.queue;
853 u16 count = 0;
854 while ((count+1) != 0 && fw_riwrh_opcode((struct fw_riwrh *)wqe) == T3_WR_RCV) {
855 count++;
856 wqe++;
857 }
858 PDBG("%s qhp %p count %u\n", __func__, qhp, count);
859 return count;
b038ced7
SW		 860}
861
862static int rdma_init(struct iwch_dev *rhp, struct iwch_qp *qhp,
863 enum iwch_qp_attr_mask mask,
864 struct iwch_qp_attributes *attrs)
865{
866 struct t3_rdma_init_attr init_attr;
867 int ret;
868
869 init_attr.tid = qhp->ep->hwtid;
870 init_attr.qpid = qhp->wq.qpid;
871 init_attr.pdid = qhp->attr.pd;
872 init_attr.scqid = qhp->attr.scq;
873 init_attr.rcqid = qhp->attr.rcq;
874 init_attr.rq_addr = qhp->wq.rq_addr;
875 init_attr.rq_size = 1 << qhp->wq.rq_size_log2;
876 init_attr.mpaattrs = uP_RI_MPA_IETF_ENABLE |
877 qhp->attr.mpa_attr.recv_marker_enabled |
878 (qhp->attr.mpa_attr.xmit_marker_enabled << 1) |
879 (qhp->attr.mpa_attr.crc_enabled << 2);
880
5f0f66b0
SW		 881 init_attr.qpcaps = uP_RI_QP_RDMA_READ_ENABLE |
882 uP_RI_QP_RDMA_WRITE_ENABLE |
883 uP_RI_QP_BIND_ENABLE;
884 if (!qhp->ibqp.uobject)
885 init_attr.qpcaps |= uP_RI_QP_STAG0_ENABLE |
886 uP_RI_QP_FAST_REGISTER_ENABLE;
887
b038ced7
SW		 888 init_attr.tcp_emss = qhp->ep->emss;
889 init_attr.ord = qhp->attr.max_ord;
890 init_attr.ird = qhp->attr.max_ird;
891 init_attr.qp_dma_addr = qhp->wq.dma_addr;
892 init_attr.qp_dma_size = (1UL << qhp->wq.size_log2);
f8b0dfd1
SW		 893 init_attr.rqe_count = iwch_rqes_posted(qhp);
894 init_attr.flags = qhp->attr.mpa_attr.initiator ? MPA_INITIATOR : 0;
f8b0dfd1
SW		 895 if (peer2peer) {
896 init_attr.rtr_type = RTR_READ;
897 if (init_attr.ord == 0 && qhp->attr.mpa_attr.initiator)
898 init_attr.ord = 1;
899 if (init_attr.ird == 0 && !qhp->attr.mpa_attr.initiator)
900 init_attr.ird = 1;
901 } else
902 init_attr.rtr_type = 0;
de3d3530 903 init_attr.irs = qhp->ep->rcv_seq;
b038ced7 904 PDBG("%s init_attr.rq_addr 0x%x init_attr.rq_size = %d "
33718363 905 "flags 0x%x qpcaps 0x%x\n", __func__,
b038ced7
SW		 906 init_attr.rq_addr, init_attr.rq_size,
907 init_attr.flags, init_attr.qpcaps);
908 ret = cxio_rdma_init(&rhp->rdev, &init_attr);
33718363 909 PDBG("%s ret %d\n", __func__, ret);
b038ced7
SW		 910 return ret;
911}
912
913int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
914 enum iwch_qp_attr_mask mask,
915 struct iwch_qp_attributes *attrs,
916 int internal)
917{
918 int ret = 0;
919 struct iwch_qp_attributes newattr = qhp->attr;
920 unsigned long flag;
921 int disconnect = 0;
922 int terminate = 0;
923 int abort = 0;
924 int free = 0;
925 struct iwch_ep *ep = NULL;
926
33718363 927 PDBG("%s qhp %p qpid 0x%x ep %p state %d -> %d\n", __func__,
b038ced7
SW		 928 qhp, qhp->wq.qpid, qhp->ep, qhp->attr.state,
929 (mask & IWCH_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
930
931 spin_lock_irqsave(&qhp->lock, flag);
932
933 /* Process attr changes if in IDLE */
934 if (mask & IWCH_QP_ATTR_VALID_MODIFY) {
935 if (qhp->attr.state != IWCH_QP_STATE_IDLE) {
936 ret = -EIO;
937 goto out;
938 }
939 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_READ)
940 newattr.enable_rdma_read = attrs->enable_rdma_read;
941 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_WRITE)
942 newattr.enable_rdma_write = attrs->enable_rdma_write;
943 if (mask & IWCH_QP_ATTR_ENABLE_RDMA_BIND)
944 newattr.enable_bind = attrs->enable_bind;
945 if (mask & IWCH_QP_ATTR_MAX_ORD) {
946 if (attrs->max_ord >
947 rhp->attr.max_rdma_read_qp_depth) {
948 ret = -EINVAL;
949 goto out;
950 }
951 newattr.max_ord = attrs->max_ord;
952 }
953 if (mask & IWCH_QP_ATTR_MAX_IRD) {
954 if (attrs->max_ird >
955 rhp->attr.max_rdma_reads_per_qp) {
956 ret = -EINVAL;
957 goto out;
958 }
959 newattr.max_ird = attrs->max_ird;
960 }
961 qhp->attr = newattr;
962 }
963
964 if (!(mask & IWCH_QP_ATTR_NEXT_STATE))
965 goto out;
966 if (qhp->attr.state == attrs->next_state)
967 goto out;
968
969 switch (qhp->attr.state) {
970 case IWCH_QP_STATE_IDLE:
971 switch (attrs->next_state) {
972 case IWCH_QP_STATE_RTS:
973 if (!(mask & IWCH_QP_ATTR_LLP_STREAM_HANDLE)) {
974 ret = -EINVAL;
975 goto out;
976 }
977 if (!(mask & IWCH_QP_ATTR_MPA_ATTR)) {
978 ret = -EINVAL;
979 goto out;
980 }
981 qhp->attr.mpa_attr = attrs->mpa_attr;
982 qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
983 qhp->ep = qhp->attr.llp_stream_handle;
984 qhp->attr.state = IWCH_QP_STATE_RTS;
985
986 /*
987 * Ref the endpoint here and deref when we
988 * disassociate the endpoint from the QP. This
989 * happens in CLOSING->IDLE transition or *->ERROR
990 * transition.
991 */
992 get_ep(&qhp->ep->com);
993 spin_unlock_irqrestore(&qhp->lock, flag);
994 ret = rdma_init(rhp, qhp, mask, attrs);
995 spin_lock_irqsave(&qhp->lock, flag);
996 if (ret)
997 goto err;
998 break;
999 case IWCH_QP_STATE_ERROR:
1000 qhp->attr.state = IWCH_QP_STATE_ERROR;
1001 flush_qp(qhp, &flag);
1002 break;
1003 default:
1004 ret = -EINVAL;
1005 goto out;
1006 }
1007 break;
1008 case IWCH_QP_STATE_RTS:
1009 switch (attrs->next_state) {
1010 case IWCH_QP_STATE_CLOSING:
1011 BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2);
1012 qhp->attr.state = IWCH_QP_STATE_CLOSING;
1013 if (!internal) {
1014 abort=0;
1015 disconnect = 1;
1016 ep = qhp->ep;
989a1780 1017 get_ep(&ep->com);
b038ced7
SW		 1018 }
1019 break;
1020 case IWCH_QP_STATE_TERMINATE:
1021 qhp->attr.state = IWCH_QP_STATE_TERMINATE;
856b5925 1022 if (qhp->ibqp.uobject)
a1a75052 1023 cxio_set_wq_in_error(&qhp->wq);
b038ced7
SW		 1024 if (!internal)
1025 terminate = 1;
1026 break;
1027 case IWCH_QP_STATE_ERROR:
1028 qhp->attr.state = IWCH_QP_STATE_ERROR;
1029 if (!internal) {
1030 abort=1;
1031 disconnect = 1;
1032 ep = qhp->ep;
989a1780 1033 get_ep(&ep->com);
b038ced7
SW		 1034 }
1035 goto err;
1036 break;
1037 default:
1038 ret = -EINVAL;
1039 goto out;
1040 }
1041 break;
1042 case IWCH_QP_STATE_CLOSING:
1043 if (!internal) {
1044 ret = -EINVAL;
1045 goto out;
1046 }
1047 switch (attrs->next_state) {
1048 case IWCH_QP_STATE_IDLE:
c8286944 1049 flush_qp(qhp, &flag);
b038ced7
SW		 1050 qhp->attr.state = IWCH_QP_STATE_IDLE;
1051 qhp->attr.llp_stream_handle = NULL;
1052 put_ep(&qhp->ep->com);
1053 qhp->ep = NULL;
1054 wake_up(&qhp->wait);
1055 break;
1056 case IWCH_QP_STATE_ERROR:
1057 goto err;
1058 default:
1059 ret = -EINVAL;
1060 goto err;
1061 }
1062 break;
1063 case IWCH_QP_STATE_ERROR:
1064 if (attrs->next_state != IWCH_QP_STATE_IDLE) {
1065 ret = -EINVAL;
1066 goto out;
1067 }
1068
1069 if (!Q_EMPTY(qhp->wq.sq_rptr, qhp->wq.sq_wptr) ||
1070 !Q_EMPTY(qhp->wq.rq_rptr, qhp->wq.rq_wptr)) {
1071 ret = -EINVAL;
1072 goto out;
1073 }
1074 qhp->attr.state = IWCH_QP_STATE_IDLE;
1075 memset(&qhp->attr, 0, sizeof(qhp->attr));
1076 break;
1077 case IWCH_QP_STATE_TERMINATE:
1078 if (!internal) {
1079 ret = -EINVAL;
1080 goto out;
1081 }
1082 goto err;
1083 break;
1084 default:
1085 printk(KERN_ERR "%s in a bad state %d\n",
33718363 1086 __func__, qhp->attr.state);
b038ced7
SW		 1087 ret = -EINVAL;
1088 goto err;
1089 break;
1090 }
1091 goto out;
1092err:
33718363 1093 PDBG("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
b038ced7
SW		 1094 qhp->wq.qpid);
1095
1096 /* disassociate the LLP connection */
1097 qhp->attr.llp_stream_handle = NULL;
1098 ep = qhp->ep;
1099 qhp->ep = NULL;
1100 qhp->attr.state = IWCH_QP_STATE_ERROR;
1101 free=1;
1102 wake_up(&qhp->wait);
1103 BUG_ON(!ep);
1104 flush_qp(qhp, &flag);
1105out:
1106 spin_unlock_irqrestore(&qhp->lock, flag);
1107
1108 if (terminate)
1109 iwch_post_terminate(qhp, NULL);
1110
1111 /*
1112 * If disconnect is 1, then we need to initiate a disconnect
1113 * on the EP. This can be a normal close (RTS->CLOSING) or
1114 * an abnormal close (RTS/CLOSING->ERROR).
1115 */
989a1780 1116 if (disconnect) {
b038ced7 1117 iwch_ep_disconnect(ep, abort, GFP_KERNEL);
989a1780
SW		 1118 put_ep(&ep->com);
1119 }
b038ced7
SW		 1120
1121 /*
1122 * If free is 1, then we've disassociated the EP from the QP
1123 * and we need to dereference the EP.
1124 */
1125 if (free)
1126 put_ep(&ep->com);
1127
33718363 1128 PDBG("%s exit state %d\n", __func__, qhp->attr.state);
b038ced7
SW		 1129 return ret;
1130}
1131
1132static int quiesce_qp(struct iwch_qp *qhp)
1133{
1134 spin_lock_irq(&qhp->lock);
1135 iwch_quiesce_tid(qhp->ep);
1136 qhp->flags |= QP_QUIESCED;
1137 spin_unlock_irq(&qhp->lock);
1138 return 0;
1139}
1140
1141static int resume_qp(struct iwch_qp *qhp)
1142{
1143 spin_lock_irq(&qhp->lock);
1144 iwch_resume_tid(qhp->ep);
1145 qhp->flags &= ~QP_QUIESCED;
1146 spin_unlock_irq(&qhp->lock);
1147 return 0;
1148}
1149
1150int iwch_quiesce_qps(struct iwch_cq *chp)
1151{
1152 int i;
1153 struct iwch_qp *qhp;
1154
1155 for (i=0; i < T3_MAX_NUM_QP; i++) {
1156 qhp = get_qhp(chp->rhp, i);
1157 if (!qhp)
1158 continue;
1159 if ((qhp->attr.rcq == chp->cq.cqid) && !qp_quiesced(qhp)) {
1160 quiesce_qp(qhp);
1161 continue;
1162 }
1163 if ((qhp->attr.scq == chp->cq.cqid) && !qp_quiesced(qhp))
1164 quiesce_qp(qhp);
1165 }
1166 return 0;
1167}
1168
1169int iwch_resume_qps(struct iwch_cq *chp)
1170{
1171 int i;
1172 struct iwch_qp *qhp;
1173
1174 for (i=0; i < T3_MAX_NUM_QP; i++) {
1175 qhp = get_qhp(chp->rhp, i);
1176 if (!qhp)
1177 continue;
1178 if ((qhp->attr.rcq == chp->cq.cqid) && qp_quiesced(qhp)) {
1179 resume_qp(qhp);
1180 continue;
1181 }
1182 if ((qhp->attr.scq == chp->cq.cqid) && qp_quiesced(qhp))
1183 resume_qp(qhp);
1184 }
1185 return 0;
1186}
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