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Merge branch 'virtex-for-2.6.25' of git://git.secretlab.ca/git/linux-2.6-virtex into...
[mirror_ubuntu-bionic-kernel.git] / drivers / infiniband / hw / nes / nes_verbs.c
1 /*
2 * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34 #include <linux/module.h>
35 #include <linux/moduleparam.h>
36 #include <linux/random.h>
37 #include <linux/highmem.h>
38 #include <asm/byteorder.h>
39
40 #include <rdma/ib_verbs.h>
41 #include <rdma/iw_cm.h>
42 #include <rdma/ib_user_verbs.h>
43
44 #include "nes.h"
45
46 #include <rdma/ib_umem.h>
47
48 atomic_t mod_qp_timouts;
49 atomic_t qps_created;
50 atomic_t sw_qps_destroyed;
51
52
53 /**
54 * nes_alloc_mw
55 */
56 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd) {
57 unsigned long flags;
58 struct nes_pd *nespd = to_nespd(ibpd);
59 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
60 struct nes_device *nesdev = nesvnic->nesdev;
61 struct nes_adapter *nesadapter = nesdev->nesadapter;
62 struct nes_cqp_request *cqp_request;
63 struct nes_mr *nesmr;
64 struct ib_mw *ibmw;
65 struct nes_hw_cqp_wqe *cqp_wqe;
66 int ret;
67 u32 stag;
68 u32 stag_index = 0;
69 u32 next_stag_index = 0;
70 u32 driver_key = 0;
71 u8 stag_key = 0;
72
73 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
74 stag_key = (u8)next_stag_index;
75
76 driver_key = 0;
77
78 next_stag_index >>= 8;
79 next_stag_index %= nesadapter->max_mr;
80
81 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
82 nesadapter->max_mr, &stag_index, &next_stag_index);
83 if (ret) {
84 return ERR_PTR(ret);
85 }
86
87 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
88 if (!nesmr) {
89 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
90 return ERR_PTR(-ENOMEM);
91 }
92
93 stag = stag_index << 8;
94 stag |= driver_key;
95 stag += (u32)stag_key;
96
97 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
98 stag, stag_index);
99
100 /* Register the region with the adapter */
101 cqp_request = nes_get_cqp_request(nesdev);
102 if (cqp_request == NULL) {
103 kfree(nesmr);
104 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
105 return ERR_PTR(-ENOMEM);
106 }
107
108 cqp_request->waiting = 1;
109 cqp_wqe = &cqp_request->cqp_wqe;
110
111 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
112 cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
113 NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
114 NES_CQP_STAG_REM_ACC_EN);
115
116 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
117 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
118 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
119
120 atomic_set(&cqp_request->refcount, 2);
121 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
122
123 /* Wait for CQP */
124 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
125 NES_EVENT_TIMEOUT);
126 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
127 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
128 stag, ret, cqp_request->major_code, cqp_request->minor_code);
129 if ((!ret) || (cqp_request->major_code)) {
130 if (atomic_dec_and_test(&cqp_request->refcount)) {
131 if (cqp_request->dynamic) {
132 kfree(cqp_request);
133 } else {
134 spin_lock_irqsave(&nesdev->cqp.lock, flags);
135 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
136 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
137 }
138 }
139 kfree(nesmr);
140 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
141 if (!ret) {
142 return ERR_PTR(-ETIME);
143 } else {
144 return ERR_PTR(-ENOMEM);
145 }
146 } else {
147 if (atomic_dec_and_test(&cqp_request->refcount)) {
148 if (cqp_request->dynamic) {
149 kfree(cqp_request);
150 } else {
151 spin_lock_irqsave(&nesdev->cqp.lock, flags);
152 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
153 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
154 }
155 }
156 }
157
158 nesmr->ibmw.rkey = stag;
159 nesmr->mode = IWNES_MEMREG_TYPE_MW;
160 ibmw = &nesmr->ibmw;
161 nesmr->pbl_4k = 0;
162 nesmr->pbls_used = 0;
163
164 return ibmw;
165 }
166
167
168 /**
169 * nes_dealloc_mw
170 */
171 static int nes_dealloc_mw(struct ib_mw *ibmw)
172 {
173 struct nes_mr *nesmr = to_nesmw(ibmw);
174 struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
175 struct nes_device *nesdev = nesvnic->nesdev;
176 struct nes_adapter *nesadapter = nesdev->nesadapter;
177 struct nes_hw_cqp_wqe *cqp_wqe;
178 struct nes_cqp_request *cqp_request;
179 int err = 0;
180 unsigned long flags;
181 int ret;
182
183 /* Deallocate the window with the adapter */
184 cqp_request = nes_get_cqp_request(nesdev);
185 if (cqp_request == NULL) {
186 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
187 return -ENOMEM;
188 }
189 cqp_request->waiting = 1;
190 cqp_wqe = &cqp_request->cqp_wqe;
191 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
192 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
193 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
194
195 atomic_set(&cqp_request->refcount, 2);
196 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
197
198 /* Wait for CQP */
199 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
200 ibmw->rkey);
201 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
202 NES_EVENT_TIMEOUT);
203 nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
204 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
205 ret, cqp_request->major_code, cqp_request->minor_code);
206 if ((!ret) || (cqp_request->major_code)) {
207 if (atomic_dec_and_test(&cqp_request->refcount)) {
208 if (cqp_request->dynamic) {
209 kfree(cqp_request);
210 } else {
211 spin_lock_irqsave(&nesdev->cqp.lock, flags);
212 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
213 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
214 }
215 }
216 if (!ret) {
217 err = -ETIME;
218 } else {
219 err = -EIO;
220 }
221 } else {
222 if (atomic_dec_and_test(&cqp_request->refcount)) {
223 if (cqp_request->dynamic) {
224 kfree(cqp_request);
225 } else {
226 spin_lock_irqsave(&nesdev->cqp.lock, flags);
227 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
228 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
229 }
230 }
231 }
232
233 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
234 (ibmw->rkey & 0x0fffff00) >> 8);
235 kfree(nesmr);
236
237 return err;
238 }
239
240
241 /**
242 * nes_bind_mw
243 */
244 static int nes_bind_mw(struct ib_qp *ibqp, struct ib_mw *ibmw,
245 struct ib_mw_bind *ibmw_bind)
246 {
247 u64 u64temp;
248 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
249 struct nes_device *nesdev = nesvnic->nesdev;
250 /* struct nes_mr *nesmr = to_nesmw(ibmw); */
251 struct nes_qp *nesqp = to_nesqp(ibqp);
252 struct nes_hw_qp_wqe *wqe;
253 unsigned long flags = 0;
254 u32 head;
255 u32 wqe_misc = 0;
256 u32 qsize;
257
258 if (nesqp->ibqp_state > IB_QPS_RTS)
259 return -EINVAL;
260
261 spin_lock_irqsave(&nesqp->lock, flags);
262
263 head = nesqp->hwqp.sq_head;
264 qsize = nesqp->hwqp.sq_tail;
265
266 /* Check for SQ overflow */
267 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
268 spin_unlock_irqrestore(&nesqp->lock, flags);
269 return -EINVAL;
270 }
271
272 wqe = &nesqp->hwqp.sq_vbase[head];
273 /* nes_debug(NES_DBG_MR, "processing sq wqe at %p, head = %u.\n", wqe, head); */
274 nes_fill_init_qp_wqe(wqe, nesqp, head);
275 u64temp = ibmw_bind->wr_id;
276 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX, u64temp);
277 wqe_misc = NES_IWARP_SQ_OP_BIND;
278
279 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
280
281 if (ibmw_bind->send_flags & IB_SEND_SIGNALED)
282 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
283
284 if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_WRITE) {
285 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE;
286 }
287 if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_READ) {
288 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_READ;
289 }
290
291 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_MISC_IDX, wqe_misc);
292 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MR_IDX, ibmw_bind->mr->lkey);
293 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MW_IDX, ibmw->rkey);
294 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_LENGTH_LOW_IDX,
295 ibmw_bind->length);
296 wqe->wqe_words[NES_IWARP_SQ_BIND_WQE_LENGTH_HIGH_IDX] = 0;
297 u64temp = (u64)ibmw_bind->addr;
298 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_VA_FBO_LOW_IDX, u64temp);
299
300 head++;
301 if (head >= qsize)
302 head = 0;
303
304 nesqp->hwqp.sq_head = head;
305 barrier();
306
307 nes_write32(nesdev->regs+NES_WQE_ALLOC,
308 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
309
310 spin_unlock_irqrestore(&nesqp->lock, flags);
311
312 return 0;
313 }
314
315
316 /**
317 * nes_alloc_fmr
318 */
319 static struct ib_fmr *nes_alloc_fmr(struct ib_pd *ibpd,
320 int ibmr_access_flags,
321 struct ib_fmr_attr *ibfmr_attr)
322 {
323 unsigned long flags;
324 struct nes_pd *nespd = to_nespd(ibpd);
325 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
326 struct nes_device *nesdev = nesvnic->nesdev;
327 struct nes_adapter *nesadapter = nesdev->nesadapter;
328 struct nes_fmr *nesfmr;
329 struct nes_cqp_request *cqp_request;
330 struct nes_hw_cqp_wqe *cqp_wqe;
331 int ret;
332 u32 stag;
333 u32 stag_index = 0;
334 u32 next_stag_index = 0;
335 u32 driver_key = 0;
336 u32 opcode = 0;
337 u8 stag_key = 0;
338 int i=0;
339 struct nes_vpbl vpbl;
340
341 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
342 stag_key = (u8)next_stag_index;
343
344 driver_key = 0;
345
346 next_stag_index >>= 8;
347 next_stag_index %= nesadapter->max_mr;
348
349 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
350 nesadapter->max_mr, &stag_index, &next_stag_index);
351 if (ret) {
352 goto failed_resource_alloc;
353 }
354
355 nesfmr = kzalloc(sizeof(*nesfmr), GFP_KERNEL);
356 if (!nesfmr) {
357 ret = -ENOMEM;
358 goto failed_fmr_alloc;
359 }
360
361 nesfmr->nesmr.mode = IWNES_MEMREG_TYPE_FMR;
362 if (ibfmr_attr->max_pages == 1) {
363 /* use zero length PBL */
364 nesfmr->nesmr.pbl_4k = 0;
365 nesfmr->nesmr.pbls_used = 0;
366 } else if (ibfmr_attr->max_pages <= 32) {
367 /* use PBL 256 */
368 nesfmr->nesmr.pbl_4k = 0;
369 nesfmr->nesmr.pbls_used = 1;
370 } else if (ibfmr_attr->max_pages <= 512) {
371 /* use 4K PBLs */
372 nesfmr->nesmr.pbl_4k = 1;
373 nesfmr->nesmr.pbls_used = 1;
374 } else {
375 /* use two level 4K PBLs */
376 /* add support for two level 256B PBLs */
377 nesfmr->nesmr.pbl_4k = 1;
378 nesfmr->nesmr.pbls_used = 1 + (ibfmr_attr->max_pages >> 9) +
379 ((ibfmr_attr->max_pages & 511) ? 1 : 0);
380 }
381 /* Register the region with the adapter */
382 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
383
384 /* track PBL resources */
385 if (nesfmr->nesmr.pbls_used != 0) {
386 if (nesfmr->nesmr.pbl_4k) {
387 if (nesfmr->nesmr.pbls_used > nesadapter->free_4kpbl) {
388 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
389 ret = -ENOMEM;
390 goto failed_vpbl_alloc;
391 } else {
392 nesadapter->free_4kpbl -= nesfmr->nesmr.pbls_used;
393 }
394 } else {
395 if (nesfmr->nesmr.pbls_used > nesadapter->free_256pbl) {
396 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
397 ret = -ENOMEM;
398 goto failed_vpbl_alloc;
399 } else {
400 nesadapter->free_256pbl -= nesfmr->nesmr.pbls_used;
401 }
402 }
403 }
404
405 /* one level pbl */
406 if (nesfmr->nesmr.pbls_used == 0) {
407 nesfmr->root_vpbl.pbl_vbase = NULL;
408 nes_debug(NES_DBG_MR, "zero level pbl \n");
409 } else if (nesfmr->nesmr.pbls_used == 1) {
410 /* can change it to kmalloc & dma_map_single */
411 nesfmr->root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
412 &nesfmr->root_vpbl.pbl_pbase);
413 if (!nesfmr->root_vpbl.pbl_vbase) {
414 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
415 ret = -ENOMEM;
416 goto failed_vpbl_alloc;
417 }
418 nesfmr->leaf_pbl_cnt = 0;
419 nes_debug(NES_DBG_MR, "one level pbl, root_vpbl.pbl_vbase=%p \n",
420 nesfmr->root_vpbl.pbl_vbase);
421 }
422 /* two level pbl */
423 else {
424 nesfmr->root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
425 &nesfmr->root_vpbl.pbl_pbase);
426 if (!nesfmr->root_vpbl.pbl_vbase) {
427 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
428 ret = -ENOMEM;
429 goto failed_vpbl_alloc;
430 }
431
432 nesfmr->root_vpbl.leaf_vpbl = kzalloc(sizeof(*nesfmr->root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
433 if (!nesfmr->root_vpbl.leaf_vpbl) {
434 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
435 ret = -ENOMEM;
436 goto failed_leaf_vpbl_alloc;
437 }
438
439 nesfmr->leaf_pbl_cnt = nesfmr->nesmr.pbls_used-1;
440 nes_debug(NES_DBG_MR, "two level pbl, root_vpbl.pbl_vbase=%p"
441 " leaf_pbl_cnt=%d root_vpbl.leaf_vpbl=%p\n",
442 nesfmr->root_vpbl.pbl_vbase, nesfmr->leaf_pbl_cnt, nesfmr->root_vpbl.leaf_vpbl);
443
444 for (i=0; i<nesfmr->leaf_pbl_cnt; i++)
445 nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase = NULL;
446
447 for (i=0; i<nesfmr->leaf_pbl_cnt; i++) {
448 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
449 &vpbl.pbl_pbase);
450
451 if (!vpbl.pbl_vbase) {
452 ret = -ENOMEM;
453 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
454 goto failed_leaf_vpbl_pages_alloc;
455 }
456
457 nesfmr->root_vpbl.pbl_vbase[i].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
458 nesfmr->root_vpbl.pbl_vbase[i].pa_high = cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
459 nesfmr->root_vpbl.leaf_vpbl[i] = vpbl;
460
461 nes_debug(NES_DBG_MR, "pbase_low=0x%x, pbase_high=0x%x, vpbl=%p\n",
462 nesfmr->root_vpbl.pbl_vbase[i].pa_low,
463 nesfmr->root_vpbl.pbl_vbase[i].pa_high,
464 &nesfmr->root_vpbl.leaf_vpbl[i]);
465 }
466 }
467 nesfmr->ib_qp = NULL;
468 nesfmr->access_rights =0;
469
470 stag = stag_index << 8;
471 stag |= driver_key;
472 stag += (u32)stag_key;
473
474 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
475 cqp_request = nes_get_cqp_request(nesdev);
476 if (cqp_request == NULL) {
477 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
478 ret = -ENOMEM;
479 goto failed_leaf_vpbl_pages_alloc;
480 }
481 cqp_request->waiting = 1;
482 cqp_wqe = &cqp_request->cqp_wqe;
483
484 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
485 stag, stag_index);
486
487 opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
488
489 if (nesfmr->nesmr.pbl_4k == 1)
490 opcode |= NES_CQP_STAG_PBL_BLK_SIZE;
491
492 if (ibmr_access_flags & IB_ACCESS_REMOTE_WRITE) {
493 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE |
494 NES_CQP_STAG_RIGHTS_LOCAL_WRITE | NES_CQP_STAG_REM_ACC_EN;
495 nesfmr->access_rights |=
496 NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_RIGHTS_LOCAL_WRITE |
497 NES_CQP_STAG_REM_ACC_EN;
498 }
499
500 if (ibmr_access_flags & IB_ACCESS_REMOTE_READ) {
501 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ |
502 NES_CQP_STAG_RIGHTS_LOCAL_READ | NES_CQP_STAG_REM_ACC_EN;
503 nesfmr->access_rights |=
504 NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_RIGHTS_LOCAL_READ |
505 NES_CQP_STAG_REM_ACC_EN;
506 }
507
508 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
509 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
510 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
511 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
512
513 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX] =
514 cpu_to_le32((nesfmr->nesmr.pbls_used>1) ?
515 (nesfmr->nesmr.pbls_used-1) : nesfmr->nesmr.pbls_used);
516
517 atomic_set(&cqp_request->refcount, 2);
518 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
519
520 /* Wait for CQP */
521 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
522 NES_EVENT_TIMEOUT);
523 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
524 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
525 stag, ret, cqp_request->major_code, cqp_request->minor_code);
526
527 if ((!ret) || (cqp_request->major_code)) {
528 if (atomic_dec_and_test(&cqp_request->refcount)) {
529 if (cqp_request->dynamic) {
530 kfree(cqp_request);
531 } else {
532 spin_lock_irqsave(&nesdev->cqp.lock, flags);
533 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
534 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
535 }
536 }
537 ret = (!ret) ? -ETIME : -EIO;
538 goto failed_leaf_vpbl_pages_alloc;
539 } else {
540 if (atomic_dec_and_test(&cqp_request->refcount)) {
541 if (cqp_request->dynamic) {
542 kfree(cqp_request);
543 } else {
544 spin_lock_irqsave(&nesdev->cqp.lock, flags);
545 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
546 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
547 }
548 }
549 }
550
551 nesfmr->nesmr.ibfmr.lkey = stag;
552 nesfmr->nesmr.ibfmr.rkey = stag;
553 nesfmr->attr = *ibfmr_attr;
554
555 return &nesfmr->nesmr.ibfmr;
556
557 failed_leaf_vpbl_pages_alloc:
558 /* unroll all allocated pages */
559 for (i=0; i<nesfmr->leaf_pbl_cnt; i++) {
560 if (nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase) {
561 pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase,
562 nesfmr->root_vpbl.leaf_vpbl[i].pbl_pbase);
563 }
564 }
565 if (nesfmr->root_vpbl.leaf_vpbl)
566 kfree(nesfmr->root_vpbl.leaf_vpbl);
567
568 failed_leaf_vpbl_alloc:
569 if (nesfmr->leaf_pbl_cnt == 0) {
570 if (nesfmr->root_vpbl.pbl_vbase)
571 pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.pbl_vbase,
572 nesfmr->root_vpbl.pbl_pbase);
573 } else
574 pci_free_consistent(nesdev->pcidev, 8192, nesfmr->root_vpbl.pbl_vbase,
575 nesfmr->root_vpbl.pbl_pbase);
576
577 failed_vpbl_alloc:
578 kfree(nesfmr);
579
580 failed_fmr_alloc:
581 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
582
583 failed_resource_alloc:
584 return ERR_PTR(ret);
585 }
586
587
588 /**
589 * nes_dealloc_fmr
590 */
591 static int nes_dealloc_fmr(struct ib_fmr *ibfmr)
592 {
593 struct nes_mr *nesmr = to_nesmr_from_ibfmr(ibfmr);
594 struct nes_fmr *nesfmr = to_nesfmr(nesmr);
595 struct nes_vnic *nesvnic = to_nesvnic(ibfmr->device);
596 struct nes_device *nesdev = nesvnic->nesdev;
597 struct nes_mr temp_nesmr = *nesmr;
598 int i = 0;
599
600 temp_nesmr.ibmw.device = ibfmr->device;
601 temp_nesmr.ibmw.pd = ibfmr->pd;
602 temp_nesmr.ibmw.rkey = ibfmr->rkey;
603 temp_nesmr.ibmw.uobject = NULL;
604
605 /* free the resources */
606 if (nesfmr->leaf_pbl_cnt == 0) {
607 /* single PBL case */
608 if (nesfmr->root_vpbl.pbl_vbase)
609 pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.pbl_vbase,
610 nesfmr->root_vpbl.pbl_pbase);
611 } else {
612 for (i = 0; i < nesfmr->leaf_pbl_cnt; i++) {
613 pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase,
614 nesfmr->root_vpbl.leaf_vpbl[i].pbl_pbase);
615 }
616 kfree(nesfmr->root_vpbl.leaf_vpbl);
617 pci_free_consistent(nesdev->pcidev, 8192, nesfmr->root_vpbl.pbl_vbase,
618 nesfmr->root_vpbl.pbl_pbase);
619 }
620
621 return nes_dealloc_mw(&temp_nesmr.ibmw);
622 }
623
624
625 /**
626 * nes_map_phys_fmr
627 */
628 static int nes_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
629 int list_len, u64 iova)
630 {
631 return 0;
632 }
633
634
635 /**
636 * nes_unmap_frm
637 */
638 static int nes_unmap_fmr(struct list_head *ibfmr_list)
639 {
640 return 0;
641 }
642
643
644
645 /**
646 * nes_query_device
647 */
648 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
649 {
650 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
651 struct nes_device *nesdev = nesvnic->nesdev;
652 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
653
654 memset(props, 0, sizeof(*props));
655 memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
656
657 props->fw_ver = nesdev->nesadapter->fw_ver;
658 props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
659 props->vendor_id = nesdev->nesadapter->vendor_id;
660 props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
661 props->hw_ver = nesdev->nesadapter->hw_rev;
662 props->max_mr_size = 0x80000000;
663 props->max_qp = nesibdev->max_qp;
664 props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
665 props->max_sge = nesdev->nesadapter->max_sge;
666 props->max_cq = nesibdev->max_cq;
667 props->max_cqe = nesdev->nesadapter->max_cqe - 1;
668 props->max_mr = nesibdev->max_mr;
669 props->max_mw = nesibdev->max_mr;
670 props->max_pd = nesibdev->max_pd;
671 props->max_sge_rd = 1;
672 switch (nesdev->nesadapter->max_irrq_wr) {
673 case 0:
674 props->max_qp_rd_atom = 1;
675 break;
676 case 1:
677 props->max_qp_rd_atom = 4;
678 break;
679 case 2:
680 props->max_qp_rd_atom = 16;
681 break;
682 case 3:
683 props->max_qp_rd_atom = 32;
684 break;
685 default:
686 props->max_qp_rd_atom = 0;
687 }
688 props->max_qp_init_rd_atom = props->max_qp_wr;
689 props->atomic_cap = IB_ATOMIC_NONE;
690 props->max_map_per_fmr = 1;
691
692 return 0;
693 }
694
695
696 /**
697 * nes_query_port
698 */
699 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
700 {
701 memset(props, 0, sizeof(*props));
702
703 props->max_mtu = IB_MTU_2048;
704 props->active_mtu = IB_MTU_2048;
705 props->lid = 1;
706 props->lmc = 0;
707 props->sm_lid = 0;
708 props->sm_sl = 0;
709 props->state = IB_PORT_ACTIVE;
710 props->phys_state = 0;
711 props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
712 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
713 props->gid_tbl_len = 1;
714 props->pkey_tbl_len = 1;
715 props->qkey_viol_cntr = 0;
716 props->active_width = IB_WIDTH_4X;
717 props->active_speed = 1;
718 props->max_msg_sz = 0x80000000;
719
720 return 0;
721 }
722
723
724 /**
725 * nes_modify_port
726 */
727 static int nes_modify_port(struct ib_device *ibdev, u8 port,
728 int port_modify_mask, struct ib_port_modify *props)
729 {
730 return 0;
731 }
732
733
734 /**
735 * nes_query_pkey
736 */
737 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
738 {
739 *pkey = 0;
740 return 0;
741 }
742
743
744 /**
745 * nes_query_gid
746 */
747 static int nes_query_gid(struct ib_device *ibdev, u8 port,
748 int index, union ib_gid *gid)
749 {
750 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
751
752 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
753 memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
754
755 return 0;
756 }
757
758
759 /**
760 * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
761 * of all objects associated with a particular user-mode client.
762 */
763 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
764 struct ib_udata *udata)
765 {
766 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
767 struct nes_device *nesdev = nesvnic->nesdev;
768 struct nes_adapter *nesadapter = nesdev->nesadapter;
769 struct nes_alloc_ucontext_req req;
770 struct nes_alloc_ucontext_resp uresp;
771 struct nes_ucontext *nes_ucontext;
772 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
773
774
775 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
776 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
777 return ERR_PTR(-EINVAL);
778 }
779
780 if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
781 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
782 req.userspace_ver, NES_ABI_USERSPACE_VER);
783 return ERR_PTR(-EINVAL);
784 }
785
786
787 memset(&uresp, 0, sizeof uresp);
788
789 uresp.max_qps = nesibdev->max_qp;
790 uresp.max_pds = nesibdev->max_pd;
791 uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
792 uresp.virtwq = nesadapter->virtwq;
793 uresp.kernel_ver = NES_ABI_KERNEL_VER;
794
795 nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
796 if (!nes_ucontext)
797 return ERR_PTR(-ENOMEM);
798
799 nes_ucontext->nesdev = nesdev;
800 nes_ucontext->mmap_wq_offset = uresp.max_pds;
801 nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
802 ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
803 PAGE_SIZE;
804
805
806 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
807 kfree(nes_ucontext);
808 return ERR_PTR(-EFAULT);
809 }
810
811 INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
812 INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
813 atomic_set(&nes_ucontext->usecnt, 1);
814 return &nes_ucontext->ibucontext;
815 }
816
817
818 /**
819 * nes_dealloc_ucontext
820 */
821 static int nes_dealloc_ucontext(struct ib_ucontext *context)
822 {
823 /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
824 /* struct nes_device *nesdev = nesvnic->nesdev; */
825 struct nes_ucontext *nes_ucontext = to_nesucontext(context);
826
827 if (!atomic_dec_and_test(&nes_ucontext->usecnt))
828 return 0;
829 kfree(nes_ucontext);
830 return 0;
831 }
832
833
834 /**
835 * nes_mmap
836 */
837 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
838 {
839 unsigned long index;
840 struct nes_vnic *nesvnic = to_nesvnic(context->device);
841 struct nes_device *nesdev = nesvnic->nesdev;
842 /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
843 struct nes_ucontext *nes_ucontext;
844 struct nes_qp *nesqp;
845
846 nes_ucontext = to_nesucontext(context);
847
848
849 if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
850 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
851 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
852 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
853 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
854 nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
855 return -EFAULT;
856 }
857 nesqp = nes_ucontext->mmap_nesqp[index];
858 if (nesqp == NULL) {
859 nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
860 return -EFAULT;
861 }
862 if (remap_pfn_range(vma, vma->vm_start,
863 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
864 vma->vm_end - vma->vm_start,
865 vma->vm_page_prot)) {
866 nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
867 return -EAGAIN;
868 }
869 vma->vm_private_data = nesqp;
870 return 0;
871 } else {
872 index = vma->vm_pgoff;
873 if (!test_bit(index, nes_ucontext->allocated_doorbells))
874 return -EFAULT;
875
876 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
877 if (io_remap_pfn_range(vma, vma->vm_start,
878 (nesdev->doorbell_start +
879 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
880 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
881 return -EAGAIN;
882 vma->vm_private_data = nes_ucontext;
883 return 0;
884 }
885
886 return -ENOSYS;
887 }
888
889
890 /**
891 * nes_alloc_pd
892 */
893 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
894 struct ib_ucontext *context, struct ib_udata *udata)
895 {
896 struct nes_pd *nespd;
897 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
898 struct nes_device *nesdev = nesvnic->nesdev;
899 struct nes_adapter *nesadapter = nesdev->nesadapter;
900 struct nes_ucontext *nesucontext;
901 struct nes_alloc_pd_resp uresp;
902 u32 pd_num = 0;
903 int err;
904
905 nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
906 nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
907 atomic_read(&nesvnic->netdev->refcnt));
908
909 err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
910 nesadapter->max_pd, &pd_num, &nesadapter->next_pd);
911 if (err) {
912 return ERR_PTR(err);
913 }
914
915 nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
916 if (!nespd) {
917 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
918 return ERR_PTR(-ENOMEM);
919 }
920
921 nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
922 nespd, nesvnic->nesibdev->ibdev.name);
923
924 nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
925
926 if (context) {
927 nesucontext = to_nesucontext(context);
928 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
929 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
930 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
931 nespd->mmap_db_index, nespd->pd_id);
932 if (nespd->mmap_db_index > NES_MAX_USER_DB_REGIONS) {
933 nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
934 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
935 kfree(nespd);
936 return ERR_PTR(-ENOMEM);
937 }
938
939 uresp.pd_id = nespd->pd_id;
940 uresp.mmap_db_index = nespd->mmap_db_index;
941 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
942 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
943 kfree(nespd);
944 return ERR_PTR(-EFAULT);
945 }
946
947 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
948 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
949 nesucontext->first_free_db = nespd->mmap_db_index + 1;
950 }
951
952 nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
953 return &nespd->ibpd;
954 }
955
956
957 /**
958 * nes_dealloc_pd
959 */
960 static int nes_dealloc_pd(struct ib_pd *ibpd)
961 {
962 struct nes_ucontext *nesucontext;
963 struct nes_pd *nespd = to_nespd(ibpd);
964 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
965 struct nes_device *nesdev = nesvnic->nesdev;
966 struct nes_adapter *nesadapter = nesdev->nesadapter;
967
968 if ((ibpd->uobject) && (ibpd->uobject->context)) {
969 nesucontext = to_nesucontext(ibpd->uobject->context);
970 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
971 nespd->mmap_db_index);
972 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
973 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
974 if (nesucontext->first_free_db > nespd->mmap_db_index) {
975 nesucontext->first_free_db = nespd->mmap_db_index;
976 }
977 }
978
979 nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
980 nespd->pd_id, nespd);
981 nes_free_resource(nesadapter, nesadapter->allocated_pds,
982 (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
983 kfree(nespd);
984
985 return 0;
986 }
987
988
989 /**
990 * nes_create_ah
991 */
992 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
993 {
994 return ERR_PTR(-ENOSYS);
995 }
996
997
998 /**
999 * nes_destroy_ah
1000 */
1001 static int nes_destroy_ah(struct ib_ah *ah)
1002 {
1003 return -ENOSYS;
1004 }
1005
1006
1007 /**
1008 * nes_get_encoded_size
1009 */
1010 static inline u8 nes_get_encoded_size(int *size)
1011 {
1012 u8 encoded_size = 0;
1013 if (*size <= 32) {
1014 *size = 32;
1015 encoded_size = 1;
1016 } else if (*size <= 128) {
1017 *size = 128;
1018 encoded_size = 2;
1019 } else if (*size <= 512) {
1020 *size = 512;
1021 encoded_size = 3;
1022 }
1023 return (encoded_size);
1024 }
1025
1026
1027
1028 /**
1029 * nes_setup_virt_qp
1030 */
1031 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
1032 struct nes_vnic *nesvnic, int sq_size, int rq_size)
1033 {
1034 unsigned long flags;
1035 void *mem;
1036 __le64 *pbl = NULL;
1037 __le64 *tpbl;
1038 __le64 *pblbuffer;
1039 struct nes_device *nesdev = nesvnic->nesdev;
1040 struct nes_adapter *nesadapter = nesdev->nesadapter;
1041 u32 pbl_entries;
1042 u8 rq_pbl_entries;
1043 u8 sq_pbl_entries;
1044
1045 pbl_entries = nespbl->pbl_size >> 3;
1046 nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%p\n",
1047 nespbl->pbl_size, pbl_entries,
1048 (void *)nespbl->pbl_vbase,
1049 (void *)nespbl->pbl_pbase);
1050 pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
1051 /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
1052 /* the first pbl to be fro the rq_vbase... */
1053 rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
1054 sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
1055 nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
1056 if (!nespbl->page) {
1057 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
1058 kfree(nespbl);
1059 return -ENOMEM;
1060 }
1061
1062 nesqp->hwqp.sq_vbase = kmap(nespbl->page);
1063 nesqp->page = nespbl->page;
1064 if (!nesqp->hwqp.sq_vbase) {
1065 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
1066 kfree(nespbl);
1067 return -ENOMEM;
1068 }
1069
1070 /* Now to get to sq.. we need to calculate how many */
1071 /* PBL entries were used by the rq.. */
1072 pbl += sq_pbl_entries;
1073 nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
1074 /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
1075 /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
1076
1077 nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%p rq_vbase=%p rq_pbase=%p\n",
1078 nesqp->hwqp.sq_vbase, (void *)nesqp->hwqp.sq_pbase,
1079 nesqp->hwqp.rq_vbase, (void *)nesqp->hwqp.rq_pbase);
1080 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1081 if (!nesadapter->free_256pbl) {
1082 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1083 nespbl->pbl_pbase);
1084 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1085 kunmap(nesqp->page);
1086 kfree(nespbl);
1087 return -ENOMEM;
1088 }
1089 nesadapter->free_256pbl--;
1090 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1091
1092 nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
1093 pblbuffer = nesqp->pbl_vbase;
1094 if (!nesqp->pbl_vbase) {
1095 /* memory allocated during nes_reg_user_mr() */
1096 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1097 nespbl->pbl_pbase);
1098 kfree(nespbl);
1099 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1100 nesadapter->free_256pbl++;
1101 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1102 kunmap(nesqp->page);
1103 return -ENOMEM;
1104 }
1105 memset(nesqp->pbl_vbase, 0, 256);
1106 /* fill in the page address in the pbl buffer.. */
1107 tpbl = pblbuffer + 16;
1108 pbl = (__le64 *)nespbl->pbl_vbase;
1109 while (sq_pbl_entries--)
1110 *tpbl++ = *pbl++;
1111 tpbl = pblbuffer;
1112 while (rq_pbl_entries--)
1113 *tpbl++ = *pbl++;
1114
1115 /* done with memory allocated during nes_reg_user_mr() */
1116 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1117 nespbl->pbl_pbase);
1118 kfree(nespbl);
1119
1120 nesqp->qp_mem_size =
1121 max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256; /* this is Q2 */
1122 /* Round up to a multiple of a page */
1123 nesqp->qp_mem_size += PAGE_SIZE - 1;
1124 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1125
1126 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1127 &nesqp->hwqp.q2_pbase);
1128
1129 if (!mem) {
1130 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
1131 nesqp->pbl_vbase = NULL;
1132 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1133 nesadapter->free_256pbl++;
1134 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1135 kunmap(nesqp->page);
1136 return -ENOMEM;
1137 }
1138 nesqp->hwqp.q2_vbase = mem;
1139 mem += 256;
1140 memset(nesqp->hwqp.q2_vbase, 0, 256);
1141 nesqp->nesqp_context = mem;
1142 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1143 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1144
1145 return 0;
1146 }
1147
1148
1149 /**
1150 * nes_setup_mmap_qp
1151 */
1152 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
1153 int sq_size, int rq_size)
1154 {
1155 void *mem;
1156 struct nes_device *nesdev = nesvnic->nesdev;
1157
1158 nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
1159 (sizeof(struct nes_hw_qp_wqe) * rq_size) +
1160 max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
1161 256; /* this is Q2 */
1162 /* Round up to a multiple of a page */
1163 nesqp->qp_mem_size += PAGE_SIZE - 1;
1164 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1165
1166 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1167 &nesqp->hwqp.sq_pbase);
1168 if (!mem)
1169 return -ENOMEM;
1170 nes_debug(NES_DBG_QP, "PCI consistent memory for "
1171 "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
1172 mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
1173
1174 memset(mem, 0, nesqp->qp_mem_size);
1175
1176 nesqp->hwqp.sq_vbase = mem;
1177 mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
1178
1179 nesqp->hwqp.rq_vbase = mem;
1180 nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
1181 sizeof(struct nes_hw_qp_wqe) * sq_size;
1182 mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
1183
1184 nesqp->hwqp.q2_vbase = mem;
1185 nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
1186 sizeof(struct nes_hw_qp_wqe) * rq_size;
1187 mem += 256;
1188 memset(nesqp->hwqp.q2_vbase, 0, 256);
1189
1190 nesqp->nesqp_context = mem;
1191 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1192 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1193 return 0;
1194 }
1195
1196
1197 /**
1198 * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
1199 */
1200 static inline void nes_free_qp_mem(struct nes_device *nesdev,
1201 struct nes_qp *nesqp, int virt_wqs)
1202 {
1203 unsigned long flags;
1204 struct nes_adapter *nesadapter = nesdev->nesadapter;
1205 if (!virt_wqs) {
1206 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1207 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
1208 }else {
1209 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1210 nesadapter->free_256pbl++;
1211 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1212 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
1213 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
1214 nesqp->pbl_vbase = NULL;
1215 kunmap(nesqp->page);
1216 }
1217 }
1218
1219
1220 /**
1221 * nes_create_qp
1222 */
1223 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1224 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1225 {
1226 u64 u64temp= 0;
1227 u64 u64nesqp = 0;
1228 struct nes_pd *nespd = to_nespd(ibpd);
1229 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1230 struct nes_device *nesdev = nesvnic->nesdev;
1231 struct nes_adapter *nesadapter = nesdev->nesadapter;
1232 struct nes_qp *nesqp;
1233 struct nes_cq *nescq;
1234 struct nes_ucontext *nes_ucontext;
1235 struct nes_hw_cqp_wqe *cqp_wqe;
1236 struct nes_cqp_request *cqp_request;
1237 struct nes_create_qp_req req;
1238 struct nes_create_qp_resp uresp;
1239 struct nes_pbl *nespbl = NULL;
1240 u32 qp_num = 0;
1241 u32 opcode = 0;
1242 /* u32 counter = 0; */
1243 void *mem;
1244 unsigned long flags;
1245 int ret;
1246 int err;
1247 int virt_wqs = 0;
1248 int sq_size;
1249 int rq_size;
1250 u8 sq_encoded_size;
1251 u8 rq_encoded_size;
1252 /* int counter; */
1253
1254 atomic_inc(&qps_created);
1255 switch (init_attr->qp_type) {
1256 case IB_QPT_RC:
1257 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1258 init_attr->cap.max_inline_data = 0;
1259 } else {
1260 init_attr->cap.max_inline_data = 64;
1261 }
1262 sq_size = init_attr->cap.max_send_wr;
1263 rq_size = init_attr->cap.max_recv_wr;
1264
1265 // check if the encoded sizes are OK or not...
1266 sq_encoded_size = nes_get_encoded_size(&sq_size);
1267 rq_encoded_size = nes_get_encoded_size(&rq_size);
1268
1269 if ((!sq_encoded_size) || (!rq_encoded_size)) {
1270 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1271 rq_size, sq_size);
1272 return ERR_PTR(-EINVAL);
1273 }
1274
1275 init_attr->cap.max_send_wr = sq_size -2;
1276 init_attr->cap.max_recv_wr = rq_size -1;
1277 nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1278
1279 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1280 nesadapter->max_qp, &qp_num, &nesadapter->next_qp);
1281 if (ret) {
1282 return ERR_PTR(ret);
1283 }
1284
1285 /* Need 512 (actually now 1024) byte alignment on this structure */
1286 mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1287 if (!mem) {
1288 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1289 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1290 return ERR_PTR(-ENOMEM);
1291 }
1292 u64nesqp = (unsigned long)mem;
1293 u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1294 u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1295 u64nesqp &= ~u64temp;
1296 nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1297 /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p. Rounded to closest %u\n",
1298 nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1299 nesqp->allocated_buffer = mem;
1300
1301 if (udata) {
1302 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1303 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1304 kfree(nesqp->allocated_buffer);
1305 nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1306 return NULL;
1307 }
1308 if (req.user_wqe_buffers) {
1309 virt_wqs = 1;
1310 }
1311 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1312 nesqp->user_mode = 1;
1313 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1314 if (virt_wqs) {
1315 err = 1;
1316 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1317 if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1318 list_del(&nespbl->list);
1319 err = 0;
1320 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1321 nespbl, nespbl->user_base);
1322 break;
1323 }
1324 }
1325 if (err) {
1326 nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1327 (long long unsigned int)req.user_wqe_buffers);
1328 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1329 kfree(nesqp->allocated_buffer);
1330 return ERR_PTR(-ENOMEM);
1331 }
1332 }
1333
1334 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1335 nesqp->mmap_sq_db_index =
1336 find_next_zero_bit(nes_ucontext->allocated_wqs,
1337 NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1338 /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1339 nespd->mmap_db_index); */
1340 if (nesqp->mmap_sq_db_index > NES_MAX_USER_WQ_REGIONS) {
1341 nes_debug(NES_DBG_QP,
1342 "db index > max user regions, failing create QP\n");
1343 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1344 if (virt_wqs) {
1345 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1346 nespbl->pbl_pbase);
1347 kfree(nespbl);
1348 }
1349 kfree(nesqp->allocated_buffer);
1350 return ERR_PTR(-ENOMEM);
1351 }
1352 set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1353 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1354 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1355 } else {
1356 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1357 kfree(nesqp->allocated_buffer);
1358 return ERR_PTR(-EFAULT);
1359 }
1360 }
1361 err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1362 nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1363 if (err) {
1364 nes_debug(NES_DBG_QP,
1365 "error geting qp mem code = %d\n", err);
1366 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1367 kfree(nesqp->allocated_buffer);
1368 return ERR_PTR(-ENOMEM);
1369 }
1370
1371 nesqp->hwqp.sq_size = sq_size;
1372 nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1373 nesqp->hwqp.sq_head = 1;
1374 nesqp->hwqp.rq_size = rq_size;
1375 nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1376 /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1377 (void *)nesqp->nesqp_context_pbase);
1378 */
1379 nesqp->hwqp.qp_id = qp_num;
1380 nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1381 nesqp->nespd = nespd;
1382
1383 nescq = to_nescq(init_attr->send_cq);
1384 nesqp->nesscq = nescq;
1385 nescq = to_nescq(init_attr->recv_cq);
1386 nesqp->nesrcq = nescq;
1387
1388 nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1389 NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1390 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1391 NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1392 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1393 NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1394 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1395 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1396 nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1397 ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1398 u64temp = (u64)nesqp->hwqp.sq_pbase;
1399 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1400 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1401
1402
1403 if (!virt_wqs) {
1404 u64temp = (u64)nesqp->hwqp.sq_pbase;
1405 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1406 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1407 u64temp = (u64)nesqp->hwqp.rq_pbase;
1408 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1409 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1410 } else {
1411 u64temp = (u64)nesqp->pbl_pbase;
1412 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1413 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1414 }
1415
1416 /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1417 nesvnic->next_qp_nic_index,
1418 nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1419 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1420 nesqp->nesqp_context->misc2 |= cpu_to_le32(
1421 (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1422 NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1423 nesvnic->next_qp_nic_index++;
1424 if ((nesvnic->next_qp_nic_index > 3) ||
1425 (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1426 nesvnic->next_qp_nic_index = 0;
1427 }
1428 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1429
1430 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1431 u64temp = (u64)nesqp->hwqp.q2_pbase;
1432 nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1433 nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1434 nesqp->nesqp_context->aeq_token_low = cpu_to_le32((u32)((unsigned long)(nesqp)));
1435 nesqp->nesqp_context->aeq_token_high = cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1436 nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1437 ((((u32)nesadapter->max_irrq_wr) <<
1438 NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1439 if (disable_mpa_crc) {
1440 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1441 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1442 }
1443
1444
1445 /* Create the QP */
1446 cqp_request = nes_get_cqp_request(nesdev);
1447 if (cqp_request == NULL) {
1448 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1449 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1450 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1451 kfree(nesqp->allocated_buffer);
1452 return ERR_PTR(-ENOMEM);
1453 }
1454 cqp_request->waiting = 1;
1455 cqp_wqe = &cqp_request->cqp_wqe;
1456
1457 if (!virt_wqs) {
1458 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1459 NES_CQP_QP_IWARP_STATE_IDLE;
1460 } else {
1461 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1462 NES_CQP_QP_IWARP_STATE_IDLE;
1463 }
1464 opcode |= NES_CQP_QP_CQS_VALID;
1465 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1466 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1467 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1468
1469 u64temp = (u64)nesqp->nesqp_context_pbase;
1470 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1471
1472 atomic_set(&cqp_request->refcount, 2);
1473 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
1474
1475 /* Wait for CQP */
1476 nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1477 nesqp->hwqp.qp_id);
1478 ret = wait_event_timeout(cqp_request->waitq,
1479 (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1480 nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1481 " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1482 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1483 nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1484 cqp_request->major_code, cqp_request->minor_code);
1485 if ((!ret) || (cqp_request->major_code)) {
1486 if (atomic_dec_and_test(&cqp_request->refcount)) {
1487 if (cqp_request->dynamic) {
1488 kfree(cqp_request);
1489 } else {
1490 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1491 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1492 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1493 }
1494 }
1495 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1496 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1497 kfree(nesqp->allocated_buffer);
1498 if (!ret) {
1499 return ERR_PTR(-ETIME);
1500 } else {
1501 return ERR_PTR(-EIO);
1502 }
1503 } else {
1504 if (atomic_dec_and_test(&cqp_request->refcount)) {
1505 if (cqp_request->dynamic) {
1506 kfree(cqp_request);
1507 } else {
1508 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1509 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1510 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1511 }
1512 }
1513 }
1514
1515 if (ibpd->uobject) {
1516 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1517 uresp.actual_sq_size = sq_size;
1518 uresp.actual_rq_size = rq_size;
1519 uresp.qp_id = nesqp->hwqp.qp_id;
1520 uresp.nes_drv_opt = nes_drv_opt;
1521 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1522 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1523 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1524 kfree(nesqp->allocated_buffer);
1525 return ERR_PTR(-EFAULT);
1526 }
1527 }
1528
1529 nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1530 nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1531 spin_lock_init(&nesqp->lock);
1532 init_waitqueue_head(&nesqp->state_waitq);
1533 init_waitqueue_head(&nesqp->kick_waitq);
1534 nes_add_ref(&nesqp->ibqp);
1535 break;
1536 default:
1537 nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1538 return ERR_PTR(-EINVAL);
1539 break;
1540 }
1541
1542 /* update the QP table */
1543 nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1544 nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1545 atomic_read(&nesvnic->netdev->refcnt));
1546
1547 return &nesqp->ibqp;
1548 }
1549
1550
1551 /**
1552 * nes_destroy_qp
1553 */
1554 static int nes_destroy_qp(struct ib_qp *ibqp)
1555 {
1556 struct nes_qp *nesqp = to_nesqp(ibqp);
1557 /* struct nes_vnic *nesvnic = to_nesvnic(ibqp->device); */
1558 struct nes_ucontext *nes_ucontext;
1559 struct ib_qp_attr attr;
1560 struct iw_cm_id *cm_id;
1561 struct iw_cm_event cm_event;
1562 int ret;
1563
1564 atomic_inc(&sw_qps_destroyed);
1565 nesqp->destroyed = 1;
1566
1567 /* Blow away the connection if it exists. */
1568 if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1569 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1570 attr.qp_state = IB_QPS_ERR;
1571 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1572 }
1573
1574 if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1575 (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1576 cm_id = nesqp->cm_id;
1577 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1578 cm_event.status = IW_CM_EVENT_STATUS_TIMEOUT;
1579 cm_event.local_addr = cm_id->local_addr;
1580 cm_event.remote_addr = cm_id->remote_addr;
1581 cm_event.private_data = NULL;
1582 cm_event.private_data_len = 0;
1583
1584 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1585 "QP%u. cm_id = %p, refcount = %u. \n",
1586 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1587
1588 cm_id->rem_ref(cm_id);
1589 ret = cm_id->event_handler(cm_id, &cm_event);
1590 if (ret)
1591 nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1592 }
1593
1594
1595 if (nesqp->user_mode) {
1596 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1597 nes_ucontext = to_nesucontext(ibqp->uobject->context);
1598 clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1599 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1600 if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1601 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1602 }
1603 }
1604 if (nesqp->pbl_pbase)
1605 kunmap(nesqp->page);
1606 }
1607
1608 nes_rem_ref(&nesqp->ibqp);
1609 return 0;
1610 }
1611
1612
1613 /**
1614 * nes_create_cq
1615 */
1616 static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
1617 int comp_vector,
1618 struct ib_ucontext *context, struct ib_udata *udata)
1619 {
1620 u64 u64temp;
1621 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1622 struct nes_device *nesdev = nesvnic->nesdev;
1623 struct nes_adapter *nesadapter = nesdev->nesadapter;
1624 struct nes_cq *nescq;
1625 struct nes_ucontext *nes_ucontext = NULL;
1626 struct nes_cqp_request *cqp_request;
1627 void *mem = NULL;
1628 struct nes_hw_cqp_wqe *cqp_wqe;
1629 struct nes_pbl *nespbl = NULL;
1630 struct nes_create_cq_req req;
1631 struct nes_create_cq_resp resp;
1632 u32 cq_num = 0;
1633 u32 opcode = 0;
1634 u32 pbl_entries = 1;
1635 int err;
1636 unsigned long flags;
1637 int ret;
1638
1639 err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1640 nesadapter->max_cq, &cq_num, &nesadapter->next_cq);
1641 if (err) {
1642 return ERR_PTR(err);
1643 }
1644
1645 nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1646 if (!nescq) {
1647 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1648 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1649 return ERR_PTR(-ENOMEM);
1650 }
1651
1652 nescq->hw_cq.cq_size = max(entries + 1, 5);
1653 nescq->hw_cq.cq_number = cq_num;
1654 nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1655
1656
1657 if (context) {
1658 nes_ucontext = to_nesucontext(context);
1659 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1660 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1661 kfree(nescq);
1662 return ERR_PTR(-EFAULT);
1663 }
1664 nesvnic->mcrq_ucontext = nes_ucontext;
1665 nes_ucontext->mcrqf = req.mcrqf;
1666 if (nes_ucontext->mcrqf) {
1667 if (nes_ucontext->mcrqf & 0x80000000)
1668 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 12 + (nes_ucontext->mcrqf & 0xf) - 1;
1669 else if (nes_ucontext->mcrqf & 0x40000000)
1670 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1671 else
1672 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1673 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1674 }
1675 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1676 (unsigned long)req.user_cq_buffer, entries);
1677 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1678 if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1679 list_del(&nespbl->list);
1680 err = 0;
1681 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1682 nespbl);
1683 break;
1684 }
1685 }
1686 if (err) {
1687 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1688 kfree(nescq);
1689 return ERR_PTR(err);
1690 }
1691
1692 pbl_entries = nespbl->pbl_size >> 3;
1693 nescq->cq_mem_size = 0;
1694 } else {
1695 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1696 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1697 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1698
1699 /* allocate the physical buffer space */
1700 mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1701 &nescq->hw_cq.cq_pbase);
1702 if (!mem) {
1703 printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1704 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1705 kfree(nescq);
1706 return ERR_PTR(-ENOMEM);
1707 }
1708
1709 memset(mem, 0, nescq->cq_mem_size);
1710 nescq->hw_cq.cq_vbase = mem;
1711 nescq->hw_cq.cq_head = 0;
1712 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1713 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1714 (u32)nescq->hw_cq.cq_pbase);
1715 }
1716
1717 nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1718 spin_lock_init(&nescq->lock);
1719
1720 /* send CreateCQ request to CQP */
1721 cqp_request = nes_get_cqp_request(nesdev);
1722 if (cqp_request == NULL) {
1723 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1724 if (!context)
1725 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1726 nescq->hw_cq.cq_pbase);
1727 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1728 kfree(nescq);
1729 return ERR_PTR(-ENOMEM);
1730 }
1731 cqp_request->waiting = 1;
1732 cqp_wqe = &cqp_request->cqp_wqe;
1733
1734 opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1735 NES_CQP_CQ_CHK_OVERFLOW |
1736 NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1737
1738 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1739
1740 if (pbl_entries != 1) {
1741 if (pbl_entries > 32) {
1742 /* use 4k pbl */
1743 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1744 if (nesadapter->free_4kpbl == 0) {
1745 if (cqp_request->dynamic) {
1746 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1747 kfree(cqp_request);
1748 } else {
1749 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1750 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1751 }
1752 if (!context)
1753 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1754 nescq->hw_cq.cq_pbase);
1755 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1756 kfree(nescq);
1757 return ERR_PTR(-ENOMEM);
1758 } else {
1759 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1760 nescq->virtual_cq = 2;
1761 nesadapter->free_4kpbl--;
1762 }
1763 } else {
1764 /* use 256 byte pbl */
1765 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1766 if (nesadapter->free_256pbl == 0) {
1767 if (cqp_request->dynamic) {
1768 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1769 kfree(cqp_request);
1770 } else {
1771 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1772 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1773 }
1774 if (!context)
1775 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1776 nescq->hw_cq.cq_pbase);
1777 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1778 kfree(nescq);
1779 return ERR_PTR(-ENOMEM);
1780 } else {
1781 opcode |= NES_CQP_CQ_VIRT;
1782 nescq->virtual_cq = 1;
1783 nesadapter->free_256pbl--;
1784 }
1785 }
1786 }
1787
1788 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1789
1790 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1791 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1792 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1793 (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1794
1795 if (context) {
1796 if (pbl_entries != 1)
1797 u64temp = (u64)nespbl->pbl_pbase;
1798 else
1799 u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1800 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1801 nes_ucontext->mmap_db_index[0]);
1802 } else {
1803 u64temp = (u64)nescq->hw_cq.cq_pbase;
1804 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1805 }
1806 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1807 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1808 u64temp = (u64)(unsigned long)&nescq->hw_cq;
1809 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1810 cpu_to_le32((u32)(u64temp >> 1));
1811 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1812 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1813
1814 atomic_set(&cqp_request->refcount, 2);
1815 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
1816
1817 /* Wait for CQP */
1818 nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1819 nescq->hw_cq.cq_number);
1820 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1821 NES_EVENT_TIMEOUT * 2);
1822 nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1823 nescq->hw_cq.cq_number, ret);
1824 if ((!ret) || (cqp_request->major_code)) {
1825 if (atomic_dec_and_test(&cqp_request->refcount)) {
1826 if (cqp_request->dynamic) {
1827 kfree(cqp_request);
1828 } else {
1829 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1830 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1831 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1832 }
1833 }
1834 nes_debug(NES_DBG_CQ, "iWARP CQ%u create timeout expired, major code = 0x%04X,"
1835 " minor code = 0x%04X\n",
1836 nescq->hw_cq.cq_number, cqp_request->major_code, cqp_request->minor_code);
1837 if (!context)
1838 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1839 nescq->hw_cq.cq_pbase);
1840 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1841 kfree(nescq);
1842 return ERR_PTR(-EIO);
1843 } else {
1844 if (atomic_dec_and_test(&cqp_request->refcount)) {
1845 if (cqp_request->dynamic) {
1846 kfree(cqp_request);
1847 } else {
1848 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1849 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1850 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1851 }
1852 }
1853 }
1854
1855 if (context) {
1856 /* free the nespbl */
1857 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1858 nespbl->pbl_pbase);
1859 kfree(nespbl);
1860 resp.cq_id = nescq->hw_cq.cq_number;
1861 resp.cq_size = nescq->hw_cq.cq_size;
1862 resp.mmap_db_index = 0;
1863 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
1864 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1865 kfree(nescq);
1866 return ERR_PTR(-EFAULT);
1867 }
1868 }
1869
1870 return &nescq->ibcq;
1871 }
1872
1873
1874 /**
1875 * nes_destroy_cq
1876 */
1877 static int nes_destroy_cq(struct ib_cq *ib_cq)
1878 {
1879 struct nes_cq *nescq;
1880 struct nes_device *nesdev;
1881 struct nes_vnic *nesvnic;
1882 struct nes_adapter *nesadapter;
1883 struct nes_hw_cqp_wqe *cqp_wqe;
1884 struct nes_cqp_request *cqp_request;
1885 unsigned long flags;
1886 u32 opcode = 0;
1887 int ret;
1888
1889 if (ib_cq == NULL)
1890 return 0;
1891
1892 nescq = to_nescq(ib_cq);
1893 nesvnic = to_nesvnic(ib_cq->device);
1894 nesdev = nesvnic->nesdev;
1895 nesadapter = nesdev->nesadapter;
1896
1897 nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1898
1899 /* Send DestroyCQ request to CQP */
1900 cqp_request = nes_get_cqp_request(nesdev);
1901 if (cqp_request == NULL) {
1902 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1903 return -ENOMEM;
1904 }
1905 cqp_request->waiting = 1;
1906 cqp_wqe = &cqp_request->cqp_wqe;
1907 opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1908 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1909 if (nescq->virtual_cq == 1) {
1910 nesadapter->free_256pbl++;
1911 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1912 printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1913 __FUNCTION__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1914 }
1915 } else if (nescq->virtual_cq == 2) {
1916 nesadapter->free_4kpbl++;
1917 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1918 printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1919 __FUNCTION__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1920 }
1921 opcode |= NES_CQP_CQ_4KB_CHUNK;
1922 }
1923
1924 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1925
1926 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1927 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1928 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1929 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1930 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1931 atomic_set(&cqp_request->refcount, 2);
1932 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
1933
1934 /* Wait for CQP */
1935 nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1936 nescq->hw_cq.cq_number);
1937 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1938 NES_EVENT_TIMEOUT);
1939 nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1940 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1941 nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1942 cqp_request->minor_code);
1943 if ((!ret) || (cqp_request->major_code)) {
1944 if (atomic_dec_and_test(&cqp_request->refcount)) {
1945 if (cqp_request->dynamic) {
1946 kfree(cqp_request);
1947 } else {
1948 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1949 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1950 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1951 }
1952 }
1953 if (!ret) {
1954 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1955 nescq->hw_cq.cq_number);
1956 ret = -ETIME;
1957 } else {
1958 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1959 nescq->hw_cq.cq_number);
1960 ret = -EIO;
1961 }
1962 } else {
1963 ret = 0;
1964 if (atomic_dec_and_test(&cqp_request->refcount)) {
1965 if (cqp_request->dynamic) {
1966 kfree(cqp_request);
1967 } else {
1968 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1969 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
1970 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1971 }
1972 }
1973 }
1974
1975 if (nescq->cq_mem_size)
1976 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1977 (void *)nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1978 kfree(nescq);
1979
1980 return ret;
1981 }
1982
1983
1984 /**
1985 * nes_reg_mr
1986 */
1987 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1988 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1989 dma_addr_t single_buffer, u16 pbl_count, u16 residual_page_count,
1990 int acc, u64 *iova_start)
1991 {
1992 struct nes_hw_cqp_wqe *cqp_wqe;
1993 struct nes_cqp_request *cqp_request;
1994 unsigned long flags;
1995 int ret;
1996 struct nes_adapter *nesadapter = nesdev->nesadapter;
1997 /* int count; */
1998 u32 opcode = 0;
1999 u16 major_code;
2000
2001 /* Register the region with the adapter */
2002 cqp_request = nes_get_cqp_request(nesdev);
2003 if (cqp_request == NULL) {
2004 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2005 return -ENOMEM;
2006 }
2007 cqp_request->waiting = 1;
2008 cqp_wqe = &cqp_request->cqp_wqe;
2009
2010 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2011 /* track PBL resources */
2012 if (pbl_count != 0) {
2013 if (pbl_count > 1) {
2014 /* Two level PBL */
2015 if ((pbl_count+1) > nesadapter->free_4kpbl) {
2016 nes_debug(NES_DBG_MR, "Out of 4KB Pbls for two level request.\n");
2017 if (cqp_request->dynamic) {
2018 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2019 kfree(cqp_request);
2020 } else {
2021 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
2022 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2023 }
2024 return -ENOMEM;
2025 } else {
2026 nesadapter->free_4kpbl -= pbl_count+1;
2027 }
2028 } else if (residual_page_count > 32) {
2029 if (pbl_count > nesadapter->free_4kpbl) {
2030 nes_debug(NES_DBG_MR, "Out of 4KB Pbls.\n");
2031 if (cqp_request->dynamic) {
2032 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2033 kfree(cqp_request);
2034 } else {
2035 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
2036 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2037 }
2038 return -ENOMEM;
2039 } else {
2040 nesadapter->free_4kpbl -= pbl_count;
2041 }
2042 } else {
2043 if (pbl_count > nesadapter->free_256pbl) {
2044 nes_debug(NES_DBG_MR, "Out of 256B Pbls.\n");
2045 if (cqp_request->dynamic) {
2046 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2047 kfree(cqp_request);
2048 } else {
2049 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
2050 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2051 }
2052 return -ENOMEM;
2053 } else {
2054 nesadapter->free_256pbl -= pbl_count;
2055 }
2056 }
2057 }
2058
2059 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2060
2061 opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
2062 NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
2063 if (acc & IB_ACCESS_LOCAL_WRITE)
2064 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
2065 if (acc & IB_ACCESS_REMOTE_WRITE)
2066 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
2067 if (acc & IB_ACCESS_REMOTE_READ)
2068 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
2069 if (acc & IB_ACCESS_MW_BIND)
2070 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
2071
2072 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2073 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
2074 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
2075 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
2076
2077 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
2078 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
2079 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
2080 cpu_to_le32(nespd->pd_id & 0x00007fff);
2081 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
2082
2083 if (pbl_count == 0) {
2084 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
2085 } else {
2086 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
2087 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
2088 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX,
2089 (((pbl_count - 1) * 4096) + (residual_page_count*8)));
2090
2091 if ((pbl_count > 1) || (residual_page_count > 32))
2092 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
2093 }
2094 barrier();
2095
2096 atomic_set(&cqp_request->refcount, 2);
2097 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
2098
2099 /* Wait for CQP */
2100 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
2101 NES_EVENT_TIMEOUT);
2102 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
2103 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2104 stag, ret, cqp_request->major_code, cqp_request->minor_code);
2105 major_code = cqp_request->major_code;
2106 if (atomic_dec_and_test(&cqp_request->refcount)) {
2107 if (cqp_request->dynamic) {
2108 kfree(cqp_request);
2109 } else {
2110 spin_lock_irqsave(&nesdev->cqp.lock, flags);
2111 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
2112 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
2113 }
2114 }
2115 if (!ret)
2116 return -ETIME;
2117 else if (major_code)
2118 return -EIO;
2119 else
2120 return 0;
2121
2122 return 0;
2123 }
2124
2125
2126 /**
2127 * nes_reg_phys_mr
2128 */
2129 static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
2130 struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
2131 u64 * iova_start)
2132 {
2133 u64 region_length;
2134 struct nes_pd *nespd = to_nespd(ib_pd);
2135 struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2136 struct nes_device *nesdev = nesvnic->nesdev;
2137 struct nes_adapter *nesadapter = nesdev->nesadapter;
2138 struct nes_mr *nesmr;
2139 struct ib_mr *ibmr;
2140 struct nes_vpbl vpbl;
2141 struct nes_root_vpbl root_vpbl;
2142 u32 stag;
2143 u32 i;
2144 u32 stag_index = 0;
2145 u32 next_stag_index = 0;
2146 u32 driver_key = 0;
2147 u32 root_pbl_index = 0;
2148 u32 cur_pbl_index = 0;
2149 int err = 0, pbl_depth = 0;
2150 int ret = 0;
2151 u16 pbl_count = 0;
2152 u8 single_page = 1;
2153 u8 stag_key = 0;
2154
2155 pbl_depth = 0;
2156 region_length = 0;
2157 vpbl.pbl_vbase = NULL;
2158 root_vpbl.pbl_vbase = NULL;
2159 root_vpbl.pbl_pbase = 0;
2160
2161 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2162 stag_key = (u8)next_stag_index;
2163
2164 driver_key = 0;
2165
2166 next_stag_index >>= 8;
2167 next_stag_index %= nesadapter->max_mr;
2168 if (num_phys_buf > (1024*512)) {
2169 return ERR_PTR(-E2BIG);
2170 }
2171
2172 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2173 &stag_index, &next_stag_index);
2174 if (err) {
2175 return ERR_PTR(err);
2176 }
2177
2178 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2179 if (!nesmr) {
2180 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2181 return ERR_PTR(-ENOMEM);
2182 }
2183
2184 for (i = 0; i < num_phys_buf; i++) {
2185
2186 if ((i & 0x01FF) == 0) {
2187 if (root_pbl_index == 1) {
2188 /* Allocate the root PBL */
2189 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
2190 &root_vpbl.pbl_pbase);
2191 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2192 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2193 if (!root_vpbl.pbl_vbase) {
2194 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2195 vpbl.pbl_pbase);
2196 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2197 kfree(nesmr);
2198 return ERR_PTR(-ENOMEM);
2199 }
2200 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
2201 if (!root_vpbl.leaf_vpbl) {
2202 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2203 root_vpbl.pbl_pbase);
2204 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2205 vpbl.pbl_pbase);
2206 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2207 kfree(nesmr);
2208 return ERR_PTR(-ENOMEM);
2209 }
2210 root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
2211 root_vpbl.pbl_vbase[0].pa_high =
2212 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2213 root_vpbl.leaf_vpbl[0] = vpbl;
2214 }
2215 /* Allocate a 4K buffer for the PBL */
2216 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2217 &vpbl.pbl_pbase);
2218 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2219 vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2220 if (!vpbl.pbl_vbase) {
2221 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2222 ibmr = ERR_PTR(-ENOMEM);
2223 kfree(nesmr);
2224 goto reg_phys_err;
2225 }
2226 /* Fill in the root table */
2227 if (1 <= root_pbl_index) {
2228 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2229 cpu_to_le32((u32)vpbl.pbl_pbase);
2230 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2231 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2232 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2233 }
2234 root_pbl_index++;
2235 cur_pbl_index = 0;
2236 }
2237 if (buffer_list[i].addr & ~PAGE_MASK) {
2238 /* TODO: Unwind allocated buffers */
2239 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2240 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2241 (unsigned int) buffer_list[i].addr);
2242 ibmr = ERR_PTR(-EINVAL);
2243 kfree(nesmr);
2244 goto reg_phys_err;
2245 }
2246
2247 if (!buffer_list[i].size) {
2248 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2249 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2250 ibmr = ERR_PTR(-EINVAL);
2251 kfree(nesmr);
2252 goto reg_phys_err;
2253 }
2254
2255 region_length += buffer_list[i].size;
2256 if ((i != 0) && (single_page)) {
2257 if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
2258 single_page = 0;
2259 }
2260 vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr);
2261 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
2262 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
2263 }
2264
2265 stag = stag_index << 8;
2266 stag |= driver_key;
2267 stag += (u32)stag_key;
2268
2269 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2270 " length = 0x%016lX, index = 0x%08X\n",
2271 stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2272
2273 region_length -= (*iova_start)&PAGE_MASK;
2274
2275 /* Make the leaf PBL the root if only one PBL */
2276 if (root_pbl_index == 1) {
2277 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2278 }
2279
2280 if (single_page) {
2281 pbl_count = 0;
2282 } else {
2283 pbl_count = root_pbl_index;
2284 }
2285 ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2286 buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start);
2287
2288 if (ret == 0) {
2289 nesmr->ibmr.rkey = stag;
2290 nesmr->ibmr.lkey = stag;
2291 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2292 ibmr = &nesmr->ibmr;
2293 nesmr->pbl_4k = ((pbl_count > 1) || (cur_pbl_index > 32)) ? 1 : 0;
2294 nesmr->pbls_used = pbl_count;
2295 if (pbl_count > 1) {
2296 nesmr->pbls_used++;
2297 }
2298 } else {
2299 kfree(nesmr);
2300 ibmr = ERR_PTR(-ENOMEM);
2301 }
2302
2303 reg_phys_err:
2304 /* free the resources */
2305 if (root_pbl_index == 1) {
2306 /* single PBL case */
2307 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2308 } else {
2309 for (i=0; i<root_pbl_index; i++) {
2310 pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
2311 root_vpbl.leaf_vpbl[i].pbl_pbase);
2312 }
2313 kfree(root_vpbl.leaf_vpbl);
2314 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2315 root_vpbl.pbl_pbase);
2316 }
2317
2318 return ibmr;
2319 }
2320
2321
2322 /**
2323 * nes_get_dma_mr
2324 */
2325 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2326 {
2327 struct ib_phys_buf bl;
2328 u64 kva = 0;
2329
2330 nes_debug(NES_DBG_MR, "\n");
2331
2332 bl.size = (u64)0xffffffffffULL;
2333 bl.addr = 0;
2334 return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
2335 }
2336
2337
2338 /**
2339 * nes_reg_user_mr
2340 */
2341 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2342 u64 virt, int acc, struct ib_udata *udata)
2343 {
2344 u64 iova_start;
2345 __le64 *pbl;
2346 u64 region_length;
2347 dma_addr_t last_dma_addr = 0;
2348 dma_addr_t first_dma_addr = 0;
2349 struct nes_pd *nespd = to_nespd(pd);
2350 struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2351 struct nes_device *nesdev = nesvnic->nesdev;
2352 struct nes_adapter *nesadapter = nesdev->nesadapter;
2353 struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2354 struct ib_umem_chunk *chunk;
2355 struct nes_ucontext *nes_ucontext;
2356 struct nes_pbl *nespbl;
2357 struct nes_mr *nesmr;
2358 struct ib_umem *region;
2359 struct nes_mem_reg_req req;
2360 struct nes_vpbl vpbl;
2361 struct nes_root_vpbl root_vpbl;
2362 int nmap_index, page_index;
2363 int page_count = 0;
2364 int err, pbl_depth = 0;
2365 int chunk_pages;
2366 int ret;
2367 u32 stag;
2368 u32 stag_index = 0;
2369 u32 next_stag_index;
2370 u32 driver_key;
2371 u32 root_pbl_index = 0;
2372 u32 cur_pbl_index = 0;
2373 u32 skip_pages;
2374 u16 pbl_count;
2375 u8 single_page = 1;
2376 u8 stag_key;
2377
2378 region = ib_umem_get(pd->uobject->context, start, length, acc);
2379 if (IS_ERR(region)) {
2380 return (struct ib_mr *)region;
2381 }
2382
2383 nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2384 " offset = %u, page size = %u.\n",
2385 (unsigned long int)start, (unsigned long int)virt, (u32)length,
2386 region->offset, region->page_size);
2387
2388 skip_pages = ((u32)region->offset) >> 12;
2389
2390 if (ib_copy_from_udata(&req, udata, sizeof(req)))
2391 return ERR_PTR(-EFAULT);
2392 nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2393
2394 switch (req.reg_type) {
2395 case IWNES_MEMREG_TYPE_MEM:
2396 pbl_depth = 0;
2397 region_length = 0;
2398 vpbl.pbl_vbase = NULL;
2399 root_vpbl.pbl_vbase = NULL;
2400 root_vpbl.pbl_pbase = 0;
2401
2402 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2403 stag_key = (u8)next_stag_index;
2404
2405 driver_key = next_stag_index & 0x70000000;
2406
2407 next_stag_index >>= 8;
2408 next_stag_index %= nesadapter->max_mr;
2409
2410 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2411 nesadapter->max_mr, &stag_index, &next_stag_index);
2412 if (err) {
2413 ib_umem_release(region);
2414 return ERR_PTR(err);
2415 }
2416
2417 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2418 if (!nesmr) {
2419 ib_umem_release(region);
2420 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2421 return ERR_PTR(-ENOMEM);
2422 }
2423 nesmr->region = region;
2424
2425 list_for_each_entry(chunk, &region->chunk_list, list) {
2426 nes_debug(NES_DBG_MR, "Chunk: nents = %u, nmap = %u .\n",
2427 chunk->nents, chunk->nmap);
2428 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2429 if (sg_dma_address(&chunk->page_list[nmap_index]) & ~PAGE_MASK) {
2430 ib_umem_release(region);
2431 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2432 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2433 (unsigned int) sg_dma_address(&chunk->page_list[nmap_index]));
2434 ibmr = ERR_PTR(-EINVAL);
2435 kfree(nesmr);
2436 goto reg_user_mr_err;
2437 }
2438
2439 if (!sg_dma_len(&chunk->page_list[nmap_index])) {
2440 ib_umem_release(region);
2441 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2442 stag_index);
2443 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2444 ibmr = ERR_PTR(-EINVAL);
2445 kfree(nesmr);
2446 goto reg_user_mr_err;
2447 }
2448
2449 region_length += sg_dma_len(&chunk->page_list[nmap_index]);
2450 chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2451 region_length -= skip_pages << 12;
2452 for (page_index=skip_pages; page_index < chunk_pages; page_index++) {
2453 skip_pages = 0;
2454 if ((page_count!=0)&&(page_count<<12)-(region->offset&(4096-1))>=region->length)
2455 goto enough_pages;
2456 if ((page_count&0x01FF) == 0) {
2457 if (page_count>(1024*512)) {
2458 ib_umem_release(region);
2459 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2460 vpbl.pbl_pbase);
2461 nes_free_resource(nesadapter,
2462 nesadapter->allocated_mrs, stag_index);
2463 kfree(nesmr);
2464 ibmr = ERR_PTR(-E2BIG);
2465 goto reg_user_mr_err;
2466 }
2467 if (root_pbl_index == 1) {
2468 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2469 8192, &root_vpbl.pbl_pbase);
2470 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2471 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2472 if (!root_vpbl.pbl_vbase) {
2473 ib_umem_release(region);
2474 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2475 vpbl.pbl_pbase);
2476 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2477 stag_index);
2478 kfree(nesmr);
2479 ibmr = ERR_PTR(-ENOMEM);
2480 goto reg_user_mr_err;
2481 }
2482 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2483 GFP_KERNEL);
2484 if (!root_vpbl.leaf_vpbl) {
2485 ib_umem_release(region);
2486 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2487 root_vpbl.pbl_pbase);
2488 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2489 vpbl.pbl_pbase);
2490 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2491 stag_index);
2492 kfree(nesmr);
2493 ibmr = ERR_PTR(-ENOMEM);
2494 goto reg_user_mr_err;
2495 }
2496 root_vpbl.pbl_vbase[0].pa_low =
2497 cpu_to_le32((u32)vpbl.pbl_pbase);
2498 root_vpbl.pbl_vbase[0].pa_high =
2499 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2500 root_vpbl.leaf_vpbl[0] = vpbl;
2501 }
2502 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2503 &vpbl.pbl_pbase);
2504 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2505 vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2506 if (!vpbl.pbl_vbase) {
2507 ib_umem_release(region);
2508 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2509 ibmr = ERR_PTR(-ENOMEM);
2510 kfree(nesmr);
2511 goto reg_user_mr_err;
2512 }
2513 if (1 <= root_pbl_index) {
2514 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2515 cpu_to_le32((u32)vpbl.pbl_pbase);
2516 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2517 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2518 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2519 }
2520 root_pbl_index++;
2521 cur_pbl_index = 0;
2522 }
2523 if (single_page) {
2524 if (page_count != 0) {
2525 if ((last_dma_addr+4096) !=
2526 (sg_dma_address(&chunk->page_list[nmap_index])+
2527 (page_index*4096)))
2528 single_page = 0;
2529 last_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2530 (page_index*4096);
2531 } else {
2532 first_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2533 (page_index*4096);
2534 last_dma_addr = first_dma_addr;
2535 }
2536 }
2537
2538 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2539 cpu_to_le32((u32)(sg_dma_address(&chunk->page_list[nmap_index])+
2540 (page_index*4096)));
2541 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2542 cpu_to_le32((u32)((((u64)(sg_dma_address(&chunk->page_list[nmap_index])+
2543 (page_index*4096))) >> 32)));
2544 cur_pbl_index++;
2545 page_count++;
2546 }
2547 }
2548 }
2549 enough_pages:
2550 nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2551 " stag_key=0x%08x\n",
2552 stag_index, driver_key, stag_key);
2553 stag = stag_index << 8;
2554 stag |= driver_key;
2555 stag += (u32)stag_key;
2556 if (stag == 0) {
2557 stag = 1;
2558 }
2559
2560 iova_start = virt;
2561 /* Make the leaf PBL the root if only one PBL */
2562 if (root_pbl_index == 1) {
2563 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2564 }
2565
2566 if (single_page) {
2567 pbl_count = 0;
2568 } else {
2569 pbl_count = root_pbl_index;
2570 first_dma_addr = 0;
2571 }
2572 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2573 " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2574 stag, (unsigned int)iova_start,
2575 (unsigned int)region_length, stag_index,
2576 (unsigned long long)region->length, pbl_count);
2577 ret = nes_reg_mr( nesdev, nespd, stag, region->length, &root_vpbl,
2578 first_dma_addr, pbl_count, (u16)cur_pbl_index, acc, &iova_start);
2579
2580 nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2581
2582 if (ret == 0) {
2583 nesmr->ibmr.rkey = stag;
2584 nesmr->ibmr.lkey = stag;
2585 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2586 ibmr = &nesmr->ibmr;
2587 nesmr->pbl_4k = ((pbl_count > 1) || (cur_pbl_index > 32)) ? 1 : 0;
2588 nesmr->pbls_used = pbl_count;
2589 if (pbl_count > 1) {
2590 nesmr->pbls_used++;
2591 }
2592 } else {
2593 ib_umem_release(region);
2594 kfree(nesmr);
2595 ibmr = ERR_PTR(-ENOMEM);
2596 }
2597
2598 reg_user_mr_err:
2599 /* free the resources */
2600 if (root_pbl_index == 1) {
2601 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2602 vpbl.pbl_pbase);
2603 } else {
2604 for (page_index=0; page_index<root_pbl_index; page_index++) {
2605 pci_free_consistent(nesdev->pcidev, 4096,
2606 root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2607 root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2608 }
2609 kfree(root_vpbl.leaf_vpbl);
2610 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2611 root_vpbl.pbl_pbase);
2612 }
2613
2614 nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2615
2616 return ibmr;
2617 break;
2618 case IWNES_MEMREG_TYPE_QP:
2619 case IWNES_MEMREG_TYPE_CQ:
2620 nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2621 if (!nespbl) {
2622 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2623 ib_umem_release(region);
2624 return ERR_PTR(-ENOMEM);
2625 }
2626 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2627 if (!nesmr) {
2628 ib_umem_release(region);
2629 kfree(nespbl);
2630 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2631 return ERR_PTR(-ENOMEM);
2632 }
2633 nesmr->region = region;
2634 nes_ucontext = to_nesucontext(pd->uobject->context);
2635 pbl_depth = region->length >> 12;
2636 pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2637 nespbl->pbl_size = pbl_depth*sizeof(u64);
2638 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2639 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2640 } else {
2641 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2642 }
2643
2644 nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2645 nespbl->pbl_size, pbl_depth);
2646 pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2647 &nespbl->pbl_pbase);
2648 if (!pbl) {
2649 ib_umem_release(region);
2650 kfree(nesmr);
2651 kfree(nespbl);
2652 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2653 return ERR_PTR(-ENOMEM);
2654 }
2655
2656 nespbl->pbl_vbase = (u64 *)pbl;
2657 nespbl->user_base = start;
2658 nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%p,"
2659 " pbl_vbase=%p user_base=0x%lx\n",
2660 nespbl->pbl_size, (void *)nespbl->pbl_pbase,
2661 (void*)nespbl->pbl_vbase, nespbl->user_base);
2662
2663 list_for_each_entry(chunk, &region->chunk_list, list) {
2664 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2665 chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2666 chunk_pages += (sg_dma_len(&chunk->page_list[nmap_index]) & (4096-1)) ? 1 : 0;
2667 nespbl->page = sg_page(&chunk->page_list[0]);
2668 for (page_index=0; page_index<chunk_pages; page_index++) {
2669 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2670 (sg_dma_address(&chunk->page_list[nmap_index])+
2671 (page_index*4096)));
2672 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2673 (sg_dma_address(&chunk->page_list[nmap_index])+
2674 (page_index*4096)))>>32);
2675 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2676 (unsigned long long)*pbl,
2677 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2678 pbl++;
2679 }
2680 }
2681 }
2682 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2683 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2684 } else {
2685 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2686 }
2687 nesmr->ibmr.rkey = -1;
2688 nesmr->ibmr.lkey = -1;
2689 nesmr->mode = req.reg_type;
2690 return &nesmr->ibmr;
2691 break;
2692 }
2693
2694 return ERR_PTR(-ENOSYS);
2695 }
2696
2697
2698 /**
2699 * nes_dereg_mr
2700 */
2701 static int nes_dereg_mr(struct ib_mr *ib_mr)
2702 {
2703 struct nes_mr *nesmr = to_nesmr(ib_mr);
2704 struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2705 struct nes_device *nesdev = nesvnic->nesdev;
2706 struct nes_adapter *nesadapter = nesdev->nesadapter;
2707 struct nes_hw_cqp_wqe *cqp_wqe;
2708 struct nes_cqp_request *cqp_request;
2709 unsigned long flags;
2710 int ret;
2711 u16 major_code;
2712 u16 minor_code;
2713
2714 if (nesmr->region) {
2715 ib_umem_release(nesmr->region);
2716 }
2717 if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2718 kfree(nesmr);
2719 return 0;
2720 }
2721
2722 /* Deallocate the region with the adapter */
2723
2724 cqp_request = nes_get_cqp_request(nesdev);
2725 if (cqp_request == NULL) {
2726 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2727 return -ENOMEM;
2728 }
2729 cqp_request->waiting = 1;
2730 cqp_wqe = &cqp_request->cqp_wqe;
2731
2732 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2733 if (nesmr->pbls_used != 0) {
2734 if (nesmr->pbl_4k) {
2735 nesadapter->free_4kpbl += nesmr->pbls_used;
2736 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
2737 printk(KERN_ERR PFX "free 4KB PBLs(%u) has exceeded the max(%u)\n",
2738 nesadapter->free_4kpbl, nesadapter->max_4kpbl);
2739 }
2740 } else {
2741 nesadapter->free_256pbl += nesmr->pbls_used;
2742 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
2743 printk(KERN_ERR PFX "free 256B PBLs(%u) has exceeded the max(%u)\n",
2744 nesadapter->free_256pbl, nesadapter->max_256pbl);
2745 }
2746 }
2747 }
2748
2749 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2750 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2751 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2752 NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2753 NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2754 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2755
2756 atomic_set(&cqp_request->refcount, 2);
2757 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
2758
2759 /* Wait for CQP */
2760 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2761 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2762 NES_EVENT_TIMEOUT);
2763 nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2764 " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2765 ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2766
2767 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2768 (ib_mr->rkey & 0x0fffff00) >> 8);
2769
2770 kfree(nesmr);
2771
2772 major_code = cqp_request->major_code;
2773 minor_code = cqp_request->minor_code;
2774 if (atomic_dec_and_test(&cqp_request->refcount)) {
2775 if (cqp_request->dynamic) {
2776 kfree(cqp_request);
2777 } else {
2778 spin_lock_irqsave(&nesdev->cqp.lock, flags);
2779 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
2780 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
2781 }
2782 }
2783 if (!ret) {
2784 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2785 " ib_mr=%p, rkey = 0x%08X\n",
2786 ib_mr, ib_mr->rkey);
2787 return -ETIME;
2788 } else if (major_code) {
2789 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2790 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2791 major_code, minor_code, ib_mr, ib_mr->rkey);
2792 return -EIO;
2793 } else
2794 return 0;
2795 }
2796
2797
2798 /**
2799 * show_rev
2800 */
2801 static ssize_t show_rev(struct class_device *cdev, char *buf)
2802 {
2803 struct nes_ib_device *nesibdev =
2804 container_of(cdev, struct nes_ib_device, ibdev.class_dev);
2805 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2806
2807 nes_debug(NES_DBG_INIT, "\n");
2808 return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2809 }
2810
2811
2812 /**
2813 * show_fw_ver
2814 */
2815 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
2816 {
2817 struct nes_ib_device *nesibdev =
2818 container_of(cdev, struct nes_ib_device, ibdev.class_dev);
2819 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2820
2821 nes_debug(NES_DBG_INIT, "\n");
2822 return sprintf(buf, "%x.%x.%x\n",
2823 (int)(nesvnic->nesdev->nesadapter->fw_ver >> 32),
2824 (int)(nesvnic->nesdev->nesadapter->fw_ver >> 16) & 0xffff,
2825 (int)(nesvnic->nesdev->nesadapter->fw_ver & 0xffff));
2826 }
2827
2828
2829 /**
2830 * show_hca
2831 */
2832 static ssize_t show_hca(struct class_device *cdev, char *buf)
2833 {
2834 nes_debug(NES_DBG_INIT, "\n");
2835 return sprintf(buf, "NES020\n");
2836 }
2837
2838
2839 /**
2840 * show_board
2841 */
2842 static ssize_t show_board(struct class_device *cdev, char *buf)
2843 {
2844 nes_debug(NES_DBG_INIT, "\n");
2845 return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2846 }
2847
2848
2849 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2850 static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2851 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2852 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2853
2854 static struct class_device_attribute *nes_class_attributes[] = {
2855 &class_device_attr_hw_rev,
2856 &class_device_attr_fw_ver,
2857 &class_device_attr_hca_type,
2858 &class_device_attr_board_id
2859 };
2860
2861
2862 /**
2863 * nes_query_qp
2864 */
2865 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2866 int attr_mask, struct ib_qp_init_attr *init_attr)
2867 {
2868 struct nes_qp *nesqp = to_nesqp(ibqp);
2869
2870 nes_debug(NES_DBG_QP, "\n");
2871
2872 attr->qp_access_flags = 0;
2873 attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2874 attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2875 attr->cap.max_recv_sge = 1;
2876 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
2877 init_attr->cap.max_inline_data = 0;
2878 } else {
2879 init_attr->cap.max_inline_data = 64;
2880 }
2881
2882 init_attr->event_handler = nesqp->ibqp.event_handler;
2883 init_attr->qp_context = nesqp->ibqp.qp_context;
2884 init_attr->send_cq = nesqp->ibqp.send_cq;
2885 init_attr->recv_cq = nesqp->ibqp.recv_cq;
2886 init_attr->srq = nesqp->ibqp.srq = nesqp->ibqp.srq;
2887 init_attr->cap = attr->cap;
2888
2889 return 0;
2890 }
2891
2892
2893 /**
2894 * nes_hw_modify_qp
2895 */
2896 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2897 u32 next_iwarp_state, u32 wait_completion)
2898 {
2899 struct nes_hw_cqp_wqe *cqp_wqe;
2900 /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2901 /* struct iw_cm_event cm_event; */
2902 struct nes_cqp_request *cqp_request;
2903 unsigned long flags;
2904 int ret;
2905 u16 major_code;
2906
2907 nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2908 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2909
2910 cqp_request = nes_get_cqp_request(nesdev);
2911 if (cqp_request == NULL) {
2912 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2913 return -ENOMEM;
2914 }
2915 if (wait_completion) {
2916 cqp_request->waiting = 1;
2917 } else {
2918 cqp_request->waiting = 0;
2919 }
2920 cqp_wqe = &cqp_request->cqp_wqe;
2921
2922 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2923 NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2924 nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2925 next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2926 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2927 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2928 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2929
2930 atomic_set(&cqp_request->refcount, 2);
2931 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
2932
2933 /* Wait for CQP */
2934 if (wait_completion) {
2935 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2936 nesqp->hwqp.qp_id); */
2937 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2938 NES_EVENT_TIMEOUT);
2939 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2940 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2941 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2942 major_code = cqp_request->major_code;
2943 if (major_code) {
2944 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2945 "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2946 nesqp->hwqp.qp_id, cqp_request->major_code,
2947 cqp_request->minor_code, next_iwarp_state);
2948 }
2949 if (atomic_dec_and_test(&cqp_request->refcount)) {
2950 if (cqp_request->dynamic) {
2951 kfree(cqp_request);
2952 } else {
2953 spin_lock_irqsave(&nesdev->cqp.lock, flags);
2954 list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
2955 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
2956 }
2957 }
2958 if (!ret)
2959 return -ETIME;
2960 else if (major_code)
2961 return -EIO;
2962 else
2963 return 0;
2964 } else {
2965 return 0;
2966 }
2967 }
2968
2969
2970 /**
2971 * nes_modify_qp
2972 */
2973 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2974 int attr_mask, struct ib_udata *udata)
2975 {
2976 struct nes_qp *nesqp = to_nesqp(ibqp);
2977 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2978 struct nes_device *nesdev = nesvnic->nesdev;
2979 /* u32 cqp_head; */
2980 /* u32 counter; */
2981 u32 next_iwarp_state = 0;
2982 int err;
2983 unsigned long qplockflags;
2984 int ret;
2985 u16 original_last_aeq;
2986 u8 issue_modify_qp = 0;
2987 u8 issue_disconnect = 0;
2988 u8 dont_wait = 0;
2989
2990 nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2991 " iwarp_state=0x%X, refcount=%d\n",
2992 nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2993 nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2994
2995 nes_add_ref(&nesqp->ibqp);
2996 spin_lock_irqsave(&nesqp->lock, qplockflags);
2997
2998 nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2999 " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
3000 nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
3001 nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
3002
3003 if (attr_mask & IB_QP_STATE) {
3004 switch (attr->qp_state) {
3005 case IB_QPS_INIT:
3006 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
3007 nesqp->hwqp.qp_id);
3008 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
3009 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3010 nes_rem_ref(&nesqp->ibqp);
3011 return -EINVAL;
3012 }
3013 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
3014 issue_modify_qp = 1;
3015 break;
3016 case IB_QPS_RTR:
3017 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
3018 nesqp->hwqp.qp_id);
3019 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
3020 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3021 nes_rem_ref(&nesqp->ibqp);
3022 return -EINVAL;
3023 }
3024 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
3025 issue_modify_qp = 1;
3026 break;
3027 case IB_QPS_RTS:
3028 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
3029 nesqp->hwqp.qp_id);
3030 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
3031 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3032 nes_rem_ref(&nesqp->ibqp);
3033 return -EINVAL;
3034 }
3035 if (nesqp->cm_id == NULL) {
3036 nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
3037 nesqp->hwqp.qp_id );
3038 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3039 nes_rem_ref(&nesqp->ibqp);
3040 return -EINVAL;
3041 }
3042 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
3043 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
3044 next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
3045 NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
3046 issue_modify_qp = 1;
3047 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
3048 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
3049 nesqp->hte_added = 1;
3050 break;
3051 case IB_QPS_SQD:
3052 issue_modify_qp = 1;
3053 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
3054 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
3055 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
3056 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3057 nes_rem_ref(&nesqp->ibqp);
3058 return 0;
3059 } else {
3060 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
3061 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3062 " ignored due to current iWARP state\n",
3063 nesqp->hwqp.qp_id);
3064 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3065 nes_rem_ref(&nesqp->ibqp);
3066 return -EINVAL;
3067 }
3068 if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
3069 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3070 " already done based on hw state.\n",
3071 nesqp->hwqp.qp_id);
3072 issue_modify_qp = 0;
3073 nesqp->in_disconnect = 0;
3074 }
3075 switch (nesqp->hw_iwarp_state) {
3076 case NES_AEQE_IWARP_STATE_CLOSING:
3077 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3078 case NES_AEQE_IWARP_STATE_TERMINATE:
3079 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3080 break;
3081 case NES_AEQE_IWARP_STATE_ERROR:
3082 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3083 break;
3084 default:
3085 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3086 nesqp->in_disconnect = 1;
3087 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
3088 break;
3089 }
3090 }
3091 break;
3092 case IB_QPS_SQE:
3093 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
3094 nesqp->hwqp.qp_id);
3095 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
3096 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3097 nes_rem_ref(&nesqp->ibqp);
3098 return -EINVAL;
3099 }
3100 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3101 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3102 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
3103 issue_modify_qp = 1;
3104 nesqp->in_disconnect = 1;
3105 break;
3106 case IB_QPS_ERR:
3107 case IB_QPS_RESET:
3108 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
3109 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3110 nes_rem_ref(&nesqp->ibqp);
3111 return -EINVAL;
3112 }
3113 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
3114 nesqp->hwqp.qp_id);
3115 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3116 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3117 if (nesqp->hte_added) {
3118 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
3119 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
3120 nesqp->hte_added = 0;
3121 }
3122 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
3123 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
3124 next_iwarp_state |= NES_CQP_QP_RESET;
3125 nesqp->in_disconnect = 1;
3126 } else {
3127 nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
3128 nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
3129 dont_wait = 1;
3130 }
3131 issue_modify_qp = 1;
3132 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
3133 break;
3134 default:
3135 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3136 nes_rem_ref(&nesqp->ibqp);
3137 return -EINVAL;
3138 break;
3139 }
3140
3141 nesqp->ibqp_state = attr->qp_state;
3142 if (((nesqp->iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) ==
3143 (u32)NES_CQP_QP_IWARP_STATE_RTS) &&
3144 ((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) >
3145 (u32)NES_CQP_QP_IWARP_STATE_RTS)) {
3146 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3147 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3148 nesqp->iwarp_state);
3149 issue_disconnect = 1;
3150 } else {
3151 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3152 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3153 nesqp->iwarp_state);
3154 }
3155 }
3156
3157 if (attr_mask & IB_QP_ACCESS_FLAGS) {
3158 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
3159 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3160 NES_QPCONTEXT_MISC_RDMA_READ_EN);
3161 issue_modify_qp = 1;
3162 }
3163 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
3164 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
3165 issue_modify_qp = 1;
3166 }
3167 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
3168 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
3169 issue_modify_qp = 1;
3170 }
3171 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
3172 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
3173 issue_modify_qp = 1;
3174 }
3175
3176 if (nesqp->user_mode) {
3177 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3178 NES_QPCONTEXT_MISC_RDMA_READ_EN);
3179 issue_modify_qp = 1;
3180 }
3181 }
3182
3183 original_last_aeq = nesqp->last_aeq;
3184 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3185
3186 nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
3187
3188 ret = 0;
3189
3190
3191 if (issue_modify_qp) {
3192 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
3193 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 1);
3194 if (ret)
3195 nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
3196 " failed for QP%u.\n",
3197 next_iwarp_state, nesqp->hwqp.qp_id);
3198
3199 }
3200
3201 if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
3202 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
3203 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3204 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3205 original_last_aeq, nesqp->last_aeq);
3206 if ((!ret) ||
3207 ((original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) &&
3208 (ret))) {
3209 if (dont_wait) {
3210 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
3211 nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
3212 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3213 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3214 original_last_aeq, nesqp->last_aeq);
3215 /* this one is for the cm_disconnect thread */
3216 nes_add_ref(&nesqp->ibqp);
3217 spin_lock_irqsave(&nesqp->lock, qplockflags);
3218 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
3219 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
3220 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3221 nes_cm_disconn(nesqp);
3222 } else {
3223 nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
3224 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3225 nes_rem_ref(&nesqp->ibqp);
3226 }
3227 } else {
3228 spin_lock_irqsave(&nesqp->lock, qplockflags);
3229 if (nesqp->cm_id) {
3230 /* These two are for the timer thread */
3231 if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3232 nes_add_ref(&nesqp->ibqp);
3233 nesqp->cm_id->add_ref(nesqp->cm_id);
3234 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3235 " need ae to finish up, original_last_aeq = 0x%04X."
3236 " last_aeq = 0x%04X, scheduling timer.\n",
3237 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3238 original_last_aeq, nesqp->last_aeq);
3239 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3240 }
3241 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3242 } else {
3243 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3244 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3245 " need ae to finish up, original_last_aeq = 0x%04X."
3246 " last_aeq = 0x%04X.\n",
3247 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3248 original_last_aeq, nesqp->last_aeq);
3249 }
3250 }
3251 } else {
3252 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3253 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3254 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3255 original_last_aeq, nesqp->last_aeq);
3256 nes_rem_ref(&nesqp->ibqp);
3257 }
3258 } else {
3259 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3260 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3261 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3262 original_last_aeq, nesqp->last_aeq);
3263 nes_rem_ref(&nesqp->ibqp);
3264 }
3265
3266 err = 0;
3267
3268 nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3269 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3270
3271 return err;
3272 }
3273
3274
3275 /**
3276 * nes_muticast_attach
3277 */
3278 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3279 {
3280 nes_debug(NES_DBG_INIT, "\n");
3281 return -ENOSYS;
3282 }
3283
3284
3285 /**
3286 * nes_multicast_detach
3287 */
3288 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3289 {
3290 nes_debug(NES_DBG_INIT, "\n");
3291 return -ENOSYS;
3292 }
3293
3294
3295 /**
3296 * nes_process_mad
3297 */
3298 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3299 u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
3300 struct ib_mad *in_mad, struct ib_mad *out_mad)
3301 {
3302 nes_debug(NES_DBG_INIT, "\n");
3303 return -ENOSYS;
3304 }
3305
3306 static inline void
3307 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3308 {
3309 int sge_index;
3310 int total_payload_length = 0;
3311 for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3312 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3313 ib_wr->sg_list[sge_index].addr);
3314 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3315 ib_wr->sg_list[sge_index].length);
3316 if (uselkey)
3317 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3318 (ib_wr->sg_list[sge_index].lkey));
3319 else
3320 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3321
3322 total_payload_length += ib_wr->sg_list[sge_index].length;
3323 }
3324 nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3325 total_payload_length);
3326 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3327 total_payload_length);
3328 }
3329
3330 /**
3331 * nes_post_send
3332 */
3333 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3334 struct ib_send_wr **bad_wr)
3335 {
3336 u64 u64temp;
3337 unsigned long flags = 0;
3338 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3339 struct nes_device *nesdev = nesvnic->nesdev;
3340 struct nes_qp *nesqp = to_nesqp(ibqp);
3341 struct nes_hw_qp_wqe *wqe;
3342 int err;
3343 u32 qsize = nesqp->hwqp.sq_size;
3344 u32 head;
3345 u32 wqe_misc;
3346 u32 wqe_count;
3347 u32 counter;
3348 u32 total_payload_length;
3349
3350 err = 0;
3351 wqe_misc = 0;
3352 wqe_count = 0;
3353 total_payload_length = 0;
3354
3355 if (nesqp->ibqp_state > IB_QPS_RTS)
3356 return -EINVAL;
3357
3358 spin_lock_irqsave(&nesqp->lock, flags);
3359
3360 head = nesqp->hwqp.sq_head;
3361
3362 while (ib_wr) {
3363 /* Check for SQ overflow */
3364 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3365 err = -EINVAL;
3366 break;
3367 }
3368
3369 wqe = &nesqp->hwqp.sq_vbase[head];
3370 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3371 nesqp->hwqp.qp_id, wqe, head); */
3372 nes_fill_init_qp_wqe(wqe, nesqp, head);
3373 u64temp = (u64)(ib_wr->wr_id);
3374 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3375 u64temp);
3376 switch (ib_wr->opcode) {
3377 case IB_WR_SEND:
3378 if (ib_wr->send_flags & IB_SEND_SOLICITED) {
3379 wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3380 } else {
3381 wqe_misc = NES_IWARP_SQ_OP_SEND;
3382 }
3383 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3384 err = -EINVAL;
3385 break;
3386 }
3387 if (ib_wr->send_flags & IB_SEND_FENCE) {
3388 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3389 }
3390 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3391 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3392 (ib_wr->sg_list[0].length <= 64)) {
3393 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3394 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3395 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3396 ib_wr->sg_list[0].length);
3397 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3398 } else {
3399 fill_wqe_sg_send(wqe, ib_wr, 1);
3400 }
3401
3402 break;
3403 case IB_WR_RDMA_WRITE:
3404 wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3405 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3406 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3407 ib_wr->num_sge,
3408 nesdev->nesadapter->max_sge);
3409 err = -EINVAL;
3410 break;
3411 }
3412 if (ib_wr->send_flags & IB_SEND_FENCE) {
3413 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3414 }
3415
3416 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3417 ib_wr->wr.rdma.rkey);
3418 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3419 ib_wr->wr.rdma.remote_addr);
3420
3421 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3422 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3423 (ib_wr->sg_list[0].length <= 64)) {
3424 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3425 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3426 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3427 ib_wr->sg_list[0].length);
3428 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3429 } else {
3430 fill_wqe_sg_send(wqe, ib_wr, 1);
3431 }
3432 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3433 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3434 break;
3435 case IB_WR_RDMA_READ:
3436 /* iWARP only supports 1 sge for RDMA reads */
3437 if (ib_wr->num_sge > 1) {
3438 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3439 ib_wr->num_sge);
3440 err = -EINVAL;
3441 break;
3442 }
3443 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3444 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3445 ib_wr->wr.rdma.remote_addr);
3446 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3447 ib_wr->wr.rdma.rkey);
3448 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3449 ib_wr->sg_list->length);
3450 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3451 ib_wr->sg_list->addr);
3452 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3453 ib_wr->sg_list->lkey);
3454 break;
3455 default:
3456 /* error */
3457 err = -EINVAL;
3458 break;
3459 }
3460
3461 if (ib_wr->send_flags & IB_SEND_SIGNALED) {
3462 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3463 }
3464 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3465
3466 ib_wr = ib_wr->next;
3467 head++;
3468 wqe_count++;
3469 if (head >= qsize)
3470 head = 0;
3471
3472 }
3473
3474 nesqp->hwqp.sq_head = head;
3475 barrier();
3476 while (wqe_count) {
3477 counter = min(wqe_count, ((u32)255));
3478 wqe_count -= counter;
3479 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3480 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3481 }
3482
3483 spin_unlock_irqrestore(&nesqp->lock, flags);
3484
3485 if (err)
3486 *bad_wr = ib_wr;
3487 return err;
3488 }
3489
3490
3491 /**
3492 * nes_post_recv
3493 */
3494 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3495 struct ib_recv_wr **bad_wr)
3496 {
3497 u64 u64temp;
3498 unsigned long flags = 0;
3499 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3500 struct nes_device *nesdev = nesvnic->nesdev;
3501 struct nes_qp *nesqp = to_nesqp(ibqp);
3502 struct nes_hw_qp_wqe *wqe;
3503 int err = 0;
3504 int sge_index;
3505 u32 qsize = nesqp->hwqp.rq_size;
3506 u32 head;
3507 u32 wqe_count = 0;
3508 u32 counter;
3509 u32 total_payload_length;
3510
3511 if (nesqp->ibqp_state > IB_QPS_RTS)
3512 return -EINVAL;
3513
3514 spin_lock_irqsave(&nesqp->lock, flags);
3515
3516 head = nesqp->hwqp.rq_head;
3517
3518 while (ib_wr) {
3519 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3520 err = -EINVAL;
3521 break;
3522 }
3523 /* Check for RQ overflow */
3524 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3525 err = -EINVAL;
3526 break;
3527 }
3528
3529 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3530 wqe = &nesqp->hwqp.rq_vbase[head];
3531
3532 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3533 nesqp->hwqp.qp_id, wqe, head); */
3534 nes_fill_init_qp_wqe(wqe, nesqp, head);
3535 u64temp = (u64)(ib_wr->wr_id);
3536 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3537 u64temp);
3538 total_payload_length = 0;
3539 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3540 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3541 ib_wr->sg_list[sge_index].addr);
3542 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3543 ib_wr->sg_list[sge_index].length);
3544 set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3545 ib_wr->sg_list[sge_index].lkey);
3546
3547 total_payload_length += ib_wr->sg_list[sge_index].length;
3548 }
3549 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3550 total_payload_length);
3551
3552 ib_wr = ib_wr->next;
3553 head++;
3554 wqe_count++;
3555 if (head >= qsize)
3556 head = 0;
3557 }
3558
3559 nesqp->hwqp.rq_head = head;
3560 barrier();
3561 while (wqe_count) {
3562 counter = min(wqe_count, ((u32)255));
3563 wqe_count -= counter;
3564 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3565 }
3566
3567 spin_unlock_irqrestore(&nesqp->lock, flags);
3568
3569 if (err)
3570 *bad_wr = ib_wr;
3571 return err;
3572 }
3573
3574
3575 /**
3576 * nes_poll_cq
3577 */
3578 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3579 {
3580 u64 u64temp;
3581 u64 wrid;
3582 /* u64 u64temp; */
3583 unsigned long flags = 0;
3584 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3585 struct nes_device *nesdev = nesvnic->nesdev;
3586 struct nes_cq *nescq = to_nescq(ibcq);
3587 struct nes_qp *nesqp;
3588 struct nes_hw_cqe cqe;
3589 u32 head;
3590 u32 wq_tail;
3591 u32 cq_size;
3592 u32 cqe_count = 0;
3593 u32 wqe_index;
3594 u32 u32temp;
3595 /* u32 counter; */
3596
3597 nes_debug(NES_DBG_CQ, "\n");
3598
3599 spin_lock_irqsave(&nescq->lock, flags);
3600
3601 head = nescq->hw_cq.cq_head;
3602 cq_size = nescq->hw_cq.cq_size;
3603
3604 while (cqe_count < num_entries) {
3605 if (le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3606 NES_CQE_VALID) {
3607 cqe = nescq->hw_cq.cq_vbase[head];
3608 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3609 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3610 wqe_index = u32temp &
3611 (nesdev->nesadapter->max_qp_wr - 1);
3612 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3613 /* parse CQE, get completion context from WQE (either rq or sq */
3614 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3615 ((u64)u32temp);
3616 nesqp = *((struct nes_qp **)&u64temp);
3617 memset(entry, 0, sizeof *entry);
3618 if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3619 entry->status = IB_WC_SUCCESS;
3620 } else {
3621 entry->status = IB_WC_WR_FLUSH_ERR;
3622 }
3623
3624 entry->qp = &nesqp->ibqp;
3625 entry->src_qp = nesqp->hwqp.qp_id;
3626
3627 if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3628 if (nesqp->skip_lsmm) {
3629 nesqp->skip_lsmm = 0;
3630 wq_tail = nesqp->hwqp.sq_tail++;
3631 }
3632
3633 /* Working on a SQ Completion*/
3634 wq_tail = wqe_index;
3635 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3636 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wq_tail].
3637 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3638 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wq_tail].
3639 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3640 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wq_tail].
3641 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3642
3643 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wq_tail].
3644 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3645 case NES_IWARP_SQ_OP_RDMAW:
3646 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3647 entry->opcode = IB_WC_RDMA_WRITE;
3648 break;
3649 case NES_IWARP_SQ_OP_RDMAR:
3650 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3651 entry->opcode = IB_WC_RDMA_READ;
3652 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wq_tail].
3653 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3654 break;
3655 case NES_IWARP_SQ_OP_SENDINV:
3656 case NES_IWARP_SQ_OP_SENDSEINV:
3657 case NES_IWARP_SQ_OP_SEND:
3658 case NES_IWARP_SQ_OP_SENDSE:
3659 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3660 entry->opcode = IB_WC_SEND;
3661 break;
3662 }
3663 } else {
3664 /* Working on a RQ Completion*/
3665 wq_tail = wqe_index;
3666 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3667 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3668 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wq_tail].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3669 ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wq_tail].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3670 entry->opcode = IB_WC_RECV;
3671 }
3672 entry->wr_id = wrid;
3673
3674 if (++head >= cq_size)
3675 head = 0;
3676 cqe_count++;
3677 nescq->polled_completions++;
3678 if ((nescq->polled_completions > (cq_size / 2)) ||
3679 (nescq->polled_completions == 255)) {
3680 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3681 " are pending %u of %u.\n",
3682 nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3683 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3684 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3685 nescq->polled_completions = 0;
3686 }
3687 entry++;
3688 } else
3689 break;
3690 }
3691
3692 if (nescq->polled_completions) {
3693 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3694 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3695 nescq->polled_completions = 0;
3696 }
3697
3698 nescq->hw_cq.cq_head = head;
3699 nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3700 cqe_count, nescq->hw_cq.cq_number);
3701
3702 spin_unlock_irqrestore(&nescq->lock, flags);
3703
3704 return cqe_count;
3705 }
3706
3707
3708 /**
3709 * nes_req_notify_cq
3710 */
3711 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3712 {
3713 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3714 struct nes_device *nesdev = nesvnic->nesdev;
3715 struct nes_cq *nescq = to_nescq(ibcq);
3716 u32 cq_arm;
3717
3718 nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3719 nescq->hw_cq.cq_number);
3720
3721 cq_arm = nescq->hw_cq.cq_number;
3722 if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3723 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3724 else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3725 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3726 else
3727 return -EINVAL;
3728
3729 nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3730 nes_read32(nesdev->regs+NES_CQE_ALLOC);
3731
3732 return 0;
3733 }
3734
3735
3736 /**
3737 * nes_init_ofa_device
3738 */
3739 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3740 {
3741 struct nes_ib_device *nesibdev;
3742 struct nes_vnic *nesvnic = netdev_priv(netdev);
3743 struct nes_device *nesdev = nesvnic->nesdev;
3744
3745 nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3746 if (nesibdev == NULL) {
3747 return NULL;
3748 }
3749 strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3750 nesibdev->ibdev.owner = THIS_MODULE;
3751
3752 nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3753 memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3754 memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3755
3756 nesibdev->ibdev.uverbs_cmd_mask =
3757 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3758 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3759 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3760 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3761 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3762 (1ull << IB_USER_VERBS_CMD_REG_MR) |
3763 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3764 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3765 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3766 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3767 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3768 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3769 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3770 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3771 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3772 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3773 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3774 (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3775 (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3776 (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3777 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3778 (1ull << IB_USER_VERBS_CMD_POST_SEND);
3779
3780 nesibdev->ibdev.phys_port_cnt = 1;
3781 nesibdev->ibdev.num_comp_vectors = 1;
3782 nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3783 nesibdev->ibdev.class_dev.dev = &nesdev->pcidev->dev;
3784 nesibdev->ibdev.query_device = nes_query_device;
3785 nesibdev->ibdev.query_port = nes_query_port;
3786 nesibdev->ibdev.modify_port = nes_modify_port;
3787 nesibdev->ibdev.query_pkey = nes_query_pkey;
3788 nesibdev->ibdev.query_gid = nes_query_gid;
3789 nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3790 nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3791 nesibdev->ibdev.mmap = nes_mmap;
3792 nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3793 nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3794 nesibdev->ibdev.create_ah = nes_create_ah;
3795 nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3796 nesibdev->ibdev.create_qp = nes_create_qp;
3797 nesibdev->ibdev.modify_qp = nes_modify_qp;
3798 nesibdev->ibdev.query_qp = nes_query_qp;
3799 nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3800 nesibdev->ibdev.create_cq = nes_create_cq;
3801 nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3802 nesibdev->ibdev.poll_cq = nes_poll_cq;
3803 nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3804 nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
3805 nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3806 nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3807 nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3808 nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3809 nesibdev->ibdev.bind_mw = nes_bind_mw;
3810
3811 nesibdev->ibdev.alloc_fmr = nes_alloc_fmr;
3812 nesibdev->ibdev.unmap_fmr = nes_unmap_fmr;
3813 nesibdev->ibdev.dealloc_fmr = nes_dealloc_fmr;
3814 nesibdev->ibdev.map_phys_fmr = nes_map_phys_fmr;
3815
3816 nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3817 nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3818 nesibdev->ibdev.process_mad = nes_process_mad;
3819
3820 nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3821 nesibdev->ibdev.post_send = nes_post_send;
3822 nesibdev->ibdev.post_recv = nes_post_recv;
3823
3824 nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3825 if (nesibdev->ibdev.iwcm == NULL) {
3826 ib_dealloc_device(&nesibdev->ibdev);
3827 return NULL;
3828 }
3829 nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3830 nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3831 nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3832 nesibdev->ibdev.iwcm->connect = nes_connect;
3833 nesibdev->ibdev.iwcm->accept = nes_accept;
3834 nesibdev->ibdev.iwcm->reject = nes_reject;
3835 nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3836 nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3837
3838 return nesibdev;
3839 }
3840
3841
3842 /**
3843 * nes_destroy_ofa_device
3844 */
3845 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3846 {
3847 if (nesibdev == NULL)
3848 return;
3849
3850 nes_unregister_ofa_device(nesibdev);
3851
3852 kfree(nesibdev->ibdev.iwcm);
3853 ib_dealloc_device(&nesibdev->ibdev);
3854 }
3855
3856
3857 /**
3858 * nes_register_ofa_device
3859 */
3860 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3861 {
3862 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3863 struct nes_device *nesdev = nesvnic->nesdev;
3864 struct nes_adapter *nesadapter = nesdev->nesadapter;
3865 int i, ret;
3866
3867 ret = ib_register_device(&nesvnic->nesibdev->ibdev);
3868 if (ret) {
3869 return ret;
3870 }
3871
3872 /* Get the resources allocated to this device */
3873 nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3874 nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3875 nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3876 nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3877
3878 for (i = 0; i < ARRAY_SIZE(nes_class_attributes); ++i) {
3879 ret = class_device_create_file(&nesibdev->ibdev.class_dev, nes_class_attributes[i]);
3880 if (ret) {
3881 while (i > 0) {
3882 i--;
3883 class_device_remove_file(&nesibdev->ibdev.class_dev,
3884 nes_class_attributes[i]);
3885 }
3886 ib_unregister_device(&nesibdev->ibdev);
3887 return ret;
3888 }
3889 }
3890
3891 nesvnic->of_device_registered = 1;
3892
3893 return 0;
3894 }
3895
3896
3897 /**
3898 * nes_unregister_ofa_device
3899 */
3900 void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3901 {
3902 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3903 int i;
3904
3905 if (nesibdev == NULL)
3906 return;
3907
3908 for (i = 0; i < ARRAY_SIZE(nes_class_attributes); ++i) {
3909 class_device_remove_file(&nesibdev->ibdev.class_dev, nes_class_attributes[i]);
3910 }
3911
3912 if (nesvnic->of_device_registered) {
3913 ib_unregister_device(&nesibdev->ibdev);
3914 }
3915
3916 nesvnic->of_device_registered = 0;
3917 }
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