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IB/core: Enhance ib_map_mr_sg()
[deliverable/linux.git] / drivers / infiniband / hw / nes / nes_verbs.c
1 /*
2 * Copyright (c) 2006 - 2011 Intel Corporation. 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 <linux/slab.h>
39 #include <asm/byteorder.h>
40
41 #include <rdma/ib_verbs.h>
42 #include <rdma/iw_cm.h>
43 #include <rdma/ib_user_verbs.h>
44
45 #include "nes.h"
46
47 #include <rdma/ib_umem.h>
48
49 atomic_t mod_qp_timouts;
50 atomic_t qps_created;
51 atomic_t sw_qps_destroyed;
52
53 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
54 static int nes_dereg_mr(struct ib_mr *ib_mr);
55
56 /**
57 * nes_alloc_mw
58 */
59 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
60 struct ib_udata *udata)
61 {
62 struct nes_pd *nespd = to_nespd(ibpd);
63 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
64 struct nes_device *nesdev = nesvnic->nesdev;
65 struct nes_adapter *nesadapter = nesdev->nesadapter;
66 struct nes_cqp_request *cqp_request;
67 struct nes_mr *nesmr;
68 struct ib_mw *ibmw;
69 struct nes_hw_cqp_wqe *cqp_wqe;
70 int ret;
71 u32 stag;
72 u32 stag_index = 0;
73 u32 next_stag_index = 0;
74 u32 driver_key = 0;
75 u8 stag_key = 0;
76
77 if (type != IB_MW_TYPE_1)
78 return ERR_PTR(-EINVAL);
79
80 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
81 stag_key = (u8)next_stag_index;
82
83 driver_key = 0;
84
85 next_stag_index >>= 8;
86 next_stag_index %= nesadapter->max_mr;
87
88 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
89 nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_MW);
90 if (ret) {
91 return ERR_PTR(ret);
92 }
93
94 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
95 if (!nesmr) {
96 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
97 return ERR_PTR(-ENOMEM);
98 }
99
100 stag = stag_index << 8;
101 stag |= driver_key;
102 stag += (u32)stag_key;
103
104 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
105 stag, stag_index);
106
107 /* Register the region with the adapter */
108 cqp_request = nes_get_cqp_request(nesdev);
109 if (cqp_request == NULL) {
110 kfree(nesmr);
111 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
112 return ERR_PTR(-ENOMEM);
113 }
114
115 cqp_request->waiting = 1;
116 cqp_wqe = &cqp_request->cqp_wqe;
117
118 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
119 cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
120 NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
121 NES_CQP_STAG_REM_ACC_EN);
122
123 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
124 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
125 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
126
127 atomic_set(&cqp_request->refcount, 2);
128 nes_post_cqp_request(nesdev, cqp_request);
129
130 /* Wait for CQP */
131 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
132 NES_EVENT_TIMEOUT);
133 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
134 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
135 stag, ret, cqp_request->major_code, cqp_request->minor_code);
136 if ((!ret) || (cqp_request->major_code)) {
137 nes_put_cqp_request(nesdev, cqp_request);
138 kfree(nesmr);
139 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
140 if (!ret) {
141 return ERR_PTR(-ETIME);
142 } else {
143 return ERR_PTR(-ENOMEM);
144 }
145 }
146 nes_put_cqp_request(nesdev, cqp_request);
147
148 nesmr->ibmw.rkey = stag;
149 nesmr->mode = IWNES_MEMREG_TYPE_MW;
150 ibmw = &nesmr->ibmw;
151 nesmr->pbl_4k = 0;
152 nesmr->pbls_used = 0;
153
154 return ibmw;
155 }
156
157
158 /**
159 * nes_dealloc_mw
160 */
161 static int nes_dealloc_mw(struct ib_mw *ibmw)
162 {
163 struct nes_mr *nesmr = to_nesmw(ibmw);
164 struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
165 struct nes_device *nesdev = nesvnic->nesdev;
166 struct nes_adapter *nesadapter = nesdev->nesadapter;
167 struct nes_hw_cqp_wqe *cqp_wqe;
168 struct nes_cqp_request *cqp_request;
169 int err = 0;
170 int ret;
171
172 /* Deallocate the window with the adapter */
173 cqp_request = nes_get_cqp_request(nesdev);
174 if (cqp_request == NULL) {
175 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
176 return -ENOMEM;
177 }
178 cqp_request->waiting = 1;
179 cqp_wqe = &cqp_request->cqp_wqe;
180 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
181 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
182 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
183
184 atomic_set(&cqp_request->refcount, 2);
185 nes_post_cqp_request(nesdev, cqp_request);
186
187 /* Wait for CQP */
188 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
189 ibmw->rkey);
190 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
191 NES_EVENT_TIMEOUT);
192 nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
193 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
194 ret, cqp_request->major_code, cqp_request->minor_code);
195 if (!ret)
196 err = -ETIME;
197 else if (cqp_request->major_code)
198 err = -EIO;
199
200 nes_put_cqp_request(nesdev, cqp_request);
201
202 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
203 (ibmw->rkey & 0x0fffff00) >> 8);
204 kfree(nesmr);
205
206 return err;
207 }
208
209
210 /*
211 * nes_alloc_fast_mr
212 */
213 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
214 u32 stag, u32 page_count)
215 {
216 struct nes_hw_cqp_wqe *cqp_wqe;
217 struct nes_cqp_request *cqp_request;
218 unsigned long flags;
219 int ret;
220 struct nes_adapter *nesadapter = nesdev->nesadapter;
221 u32 opcode = 0;
222 u16 major_code;
223 u64 region_length = page_count * PAGE_SIZE;
224
225
226 cqp_request = nes_get_cqp_request(nesdev);
227 if (cqp_request == NULL) {
228 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
229 return -ENOMEM;
230 }
231 nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
232 "region_length = %llu\n",
233 page_count, region_length);
234 cqp_request->waiting = 1;
235 cqp_wqe = &cqp_request->cqp_wqe;
236
237 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
238 if (nesadapter->free_4kpbl > 0) {
239 nesadapter->free_4kpbl--;
240 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
241 } else {
242 /* No 4kpbl's available: */
243 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
244 nes_debug(NES_DBG_MR, "Out of Pbls\n");
245 nes_free_cqp_request(nesdev, cqp_request);
246 return -ENOMEM;
247 }
248
249 opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
250 NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
251 NES_CQP_STAG_REM_ACC_EN;
252 /*
253 * The current OFED API does not support the zero based TO option.
254 * If added then need to changed the NES_CQP_STAG_VA* option. Also,
255 * the API does not support that ability to have the MR set for local
256 * access only when created and not allow the SQ op to override. Given
257 * this the remote enable must be set here.
258 */
259
260 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
261 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
262 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
263
264 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
265 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
266 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
267 cpu_to_le32(nespd->pd_id & 0x00007fff);
268
269 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
270 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
271 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
272 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
273 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
274 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
275 barrier();
276
277 atomic_set(&cqp_request->refcount, 2);
278 nes_post_cqp_request(nesdev, cqp_request);
279
280 /* Wait for CQP */
281 ret = wait_event_timeout(cqp_request->waitq,
282 (0 != cqp_request->request_done),
283 NES_EVENT_TIMEOUT);
284
285 nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
286 "wait_event_timeout ret = %u, CQP Major:Minor codes = "
287 "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
288 cqp_request->minor_code);
289 major_code = cqp_request->major_code;
290 nes_put_cqp_request(nesdev, cqp_request);
291
292 if (!ret || major_code) {
293 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
294 nesadapter->free_4kpbl++;
295 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
296 }
297
298 if (!ret)
299 return -ETIME;
300 else if (major_code)
301 return -EIO;
302 return 0;
303 }
304
305 /*
306 * nes_alloc_mr
307 */
308 static struct ib_mr *nes_alloc_mr(struct ib_pd *ibpd,
309 enum ib_mr_type mr_type,
310 u32 max_num_sg)
311 {
312 struct nes_pd *nespd = to_nespd(ibpd);
313 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
314 struct nes_device *nesdev = nesvnic->nesdev;
315 struct nes_adapter *nesadapter = nesdev->nesadapter;
316
317 u32 next_stag_index;
318 u8 stag_key = 0;
319 u32 driver_key = 0;
320 int err = 0;
321 u32 stag_index = 0;
322 struct nes_mr *nesmr;
323 u32 stag;
324 int ret;
325 struct ib_mr *ibmr;
326
327 if (mr_type != IB_MR_TYPE_MEM_REG)
328 return ERR_PTR(-EINVAL);
329
330 if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
331 return ERR_PTR(-E2BIG);
332
333 /*
334 * Note: Set to always use a fixed length single page entry PBL. This is to allow
335 * for the fast_reg_mr operation to always know the size of the PBL.
336 */
337 if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
338 return ERR_PTR(-E2BIG);
339
340 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
341 stag_key = (u8)next_stag_index;
342 next_stag_index >>= 8;
343 next_stag_index %= nesadapter->max_mr;
344
345 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
346 nesadapter->max_mr, &stag_index,
347 &next_stag_index, NES_RESOURCE_FAST_MR);
348 if (err)
349 return ERR_PTR(err);
350
351 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
352 if (!nesmr) {
353 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
354 return ERR_PTR(-ENOMEM);
355 }
356
357 stag = stag_index << 8;
358 stag |= driver_key;
359 stag += (u32)stag_key;
360
361 nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
362 stag, stag_index);
363
364 ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_num_sg);
365
366 if (ret == 0) {
367 nesmr->ibmr.rkey = stag;
368 nesmr->ibmr.lkey = stag;
369 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
370 ibmr = &nesmr->ibmr;
371 } else {
372 kfree(nesmr);
373 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
374 return ERR_PTR(-ENOMEM);
375 }
376
377 nesmr->pages = pci_alloc_consistent(nesdev->pcidev,
378 max_num_sg * sizeof(u64),
379 &nesmr->paddr);
380 if (!nesmr->paddr)
381 goto err;
382
383 nesmr->max_pages = max_num_sg;
384
385 return ibmr;
386
387 err:
388 nes_dereg_mr(ibmr);
389
390 return ERR_PTR(-ENOMEM);
391 }
392
393 static int nes_set_page(struct ib_mr *ibmr, u64 addr)
394 {
395 struct nes_mr *nesmr = to_nesmr(ibmr);
396
397 if (unlikely(nesmr->npages == nesmr->max_pages))
398 return -ENOMEM;
399
400 nesmr->pages[nesmr->npages++] = cpu_to_le64(addr);
401
402 return 0;
403 }
404
405 static int nes_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
406 int sg_nents, unsigned int *sg_offset)
407 {
408 struct nes_mr *nesmr = to_nesmr(ibmr);
409
410 nesmr->npages = 0;
411
412 return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, nes_set_page);
413 }
414
415 /**
416 * nes_query_device
417 */
418 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
419 struct ib_udata *uhw)
420 {
421 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
422 struct nes_device *nesdev = nesvnic->nesdev;
423 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
424
425 if (uhw->inlen || uhw->outlen)
426 return -EINVAL;
427
428 memset(props, 0, sizeof(*props));
429 memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
430
431 props->fw_ver = nesdev->nesadapter->firmware_version;
432 props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
433 props->vendor_id = nesdev->nesadapter->vendor_id;
434 props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
435 props->hw_ver = nesdev->nesadapter->hw_rev;
436 props->max_mr_size = 0x80000000;
437 props->max_qp = nesibdev->max_qp;
438 props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
439 props->max_sge = nesdev->nesadapter->max_sge;
440 props->max_cq = nesibdev->max_cq;
441 props->max_cqe = nesdev->nesadapter->max_cqe;
442 props->max_mr = nesibdev->max_mr;
443 props->max_mw = nesibdev->max_mr;
444 props->max_pd = nesibdev->max_pd;
445 props->max_sge_rd = 1;
446 switch (nesdev->nesadapter->max_irrq_wr) {
447 case 0:
448 props->max_qp_rd_atom = 2;
449 break;
450 case 1:
451 props->max_qp_rd_atom = 8;
452 break;
453 case 2:
454 props->max_qp_rd_atom = 32;
455 break;
456 case 3:
457 props->max_qp_rd_atom = 64;
458 break;
459 default:
460 props->max_qp_rd_atom = 0;
461 }
462 props->max_qp_init_rd_atom = props->max_qp_rd_atom;
463 props->atomic_cap = IB_ATOMIC_NONE;
464 props->max_map_per_fmr = 1;
465
466 return 0;
467 }
468
469
470 /**
471 * nes_query_port
472 */
473 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
474 {
475 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
476 struct net_device *netdev = nesvnic->netdev;
477
478 memset(props, 0, sizeof(*props));
479
480 props->max_mtu = IB_MTU_4096;
481
482 if (netdev->mtu >= 4096)
483 props->active_mtu = IB_MTU_4096;
484 else if (netdev->mtu >= 2048)
485 props->active_mtu = IB_MTU_2048;
486 else if (netdev->mtu >= 1024)
487 props->active_mtu = IB_MTU_1024;
488 else if (netdev->mtu >= 512)
489 props->active_mtu = IB_MTU_512;
490 else
491 props->active_mtu = IB_MTU_256;
492
493 props->lid = 1;
494 props->lmc = 0;
495 props->sm_lid = 0;
496 props->sm_sl = 0;
497 if (netif_queue_stopped(netdev))
498 props->state = IB_PORT_DOWN;
499 else if (nesvnic->linkup)
500 props->state = IB_PORT_ACTIVE;
501 else
502 props->state = IB_PORT_DOWN;
503 props->phys_state = 0;
504 props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
505 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
506 props->gid_tbl_len = 1;
507 props->pkey_tbl_len = 1;
508 props->qkey_viol_cntr = 0;
509 props->active_width = IB_WIDTH_4X;
510 props->active_speed = IB_SPEED_SDR;
511 props->max_msg_sz = 0x80000000;
512
513 return 0;
514 }
515
516 /**
517 * nes_query_pkey
518 */
519 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
520 {
521 *pkey = 0;
522 return 0;
523 }
524
525
526 /**
527 * nes_query_gid
528 */
529 static int nes_query_gid(struct ib_device *ibdev, u8 port,
530 int index, union ib_gid *gid)
531 {
532 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
533
534 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
535 memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
536
537 return 0;
538 }
539
540
541 /**
542 * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
543 * of all objects associated with a particular user-mode client.
544 */
545 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
546 struct ib_udata *udata)
547 {
548 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
549 struct nes_device *nesdev = nesvnic->nesdev;
550 struct nes_adapter *nesadapter = nesdev->nesadapter;
551 struct nes_alloc_ucontext_req req;
552 struct nes_alloc_ucontext_resp uresp;
553 struct nes_ucontext *nes_ucontext;
554 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
555
556
557 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
558 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
559 return ERR_PTR(-EINVAL);
560 }
561
562 if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
563 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
564 req.userspace_ver, NES_ABI_USERSPACE_VER);
565 return ERR_PTR(-EINVAL);
566 }
567
568
569 memset(&uresp, 0, sizeof uresp);
570
571 uresp.max_qps = nesibdev->max_qp;
572 uresp.max_pds = nesibdev->max_pd;
573 uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
574 uresp.virtwq = nesadapter->virtwq;
575 uresp.kernel_ver = NES_ABI_KERNEL_VER;
576
577 nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
578 if (!nes_ucontext)
579 return ERR_PTR(-ENOMEM);
580
581 nes_ucontext->nesdev = nesdev;
582 nes_ucontext->mmap_wq_offset = uresp.max_pds;
583 nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
584 ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
585 PAGE_SIZE;
586
587
588 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
589 kfree(nes_ucontext);
590 return ERR_PTR(-EFAULT);
591 }
592
593 INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
594 INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
595 atomic_set(&nes_ucontext->usecnt, 1);
596 return &nes_ucontext->ibucontext;
597 }
598
599
600 /**
601 * nes_dealloc_ucontext
602 */
603 static int nes_dealloc_ucontext(struct ib_ucontext *context)
604 {
605 /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
606 /* struct nes_device *nesdev = nesvnic->nesdev; */
607 struct nes_ucontext *nes_ucontext = to_nesucontext(context);
608
609 if (!atomic_dec_and_test(&nes_ucontext->usecnt))
610 return 0;
611 kfree(nes_ucontext);
612 return 0;
613 }
614
615
616 /**
617 * nes_mmap
618 */
619 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
620 {
621 unsigned long index;
622 struct nes_vnic *nesvnic = to_nesvnic(context->device);
623 struct nes_device *nesdev = nesvnic->nesdev;
624 /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
625 struct nes_ucontext *nes_ucontext;
626 struct nes_qp *nesqp;
627
628 nes_ucontext = to_nesucontext(context);
629
630
631 if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
632 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
633 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
634 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
635 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
636 nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
637 return -EFAULT;
638 }
639 nesqp = nes_ucontext->mmap_nesqp[index];
640 if (nesqp == NULL) {
641 nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
642 return -EFAULT;
643 }
644 if (remap_pfn_range(vma, vma->vm_start,
645 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
646 vma->vm_end - vma->vm_start,
647 vma->vm_page_prot)) {
648 nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
649 return -EAGAIN;
650 }
651 vma->vm_private_data = nesqp;
652 return 0;
653 } else {
654 index = vma->vm_pgoff;
655 if (!test_bit(index, nes_ucontext->allocated_doorbells))
656 return -EFAULT;
657
658 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
659 if (io_remap_pfn_range(vma, vma->vm_start,
660 (nesdev->doorbell_start +
661 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
662 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
663 return -EAGAIN;
664 vma->vm_private_data = nes_ucontext;
665 return 0;
666 }
667
668 return -ENOSYS;
669 }
670
671
672 /**
673 * nes_alloc_pd
674 */
675 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
676 struct ib_ucontext *context, struct ib_udata *udata)
677 {
678 struct nes_pd *nespd;
679 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
680 struct nes_device *nesdev = nesvnic->nesdev;
681 struct nes_adapter *nesadapter = nesdev->nesadapter;
682 struct nes_ucontext *nesucontext;
683 struct nes_alloc_pd_resp uresp;
684 u32 pd_num = 0;
685 int err;
686
687 nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
688 nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
689 netdev_refcnt_read(nesvnic->netdev));
690
691 err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
692 nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
693 if (err) {
694 return ERR_PTR(err);
695 }
696
697 nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
698 if (!nespd) {
699 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
700 return ERR_PTR(-ENOMEM);
701 }
702
703 nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
704 nespd, nesvnic->nesibdev->ibdev.name);
705
706 nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
707
708 if (context) {
709 nesucontext = to_nesucontext(context);
710 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
711 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
712 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
713 nespd->mmap_db_index, nespd->pd_id);
714 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
715 nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
716 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
717 kfree(nespd);
718 return ERR_PTR(-ENOMEM);
719 }
720
721 uresp.pd_id = nespd->pd_id;
722 uresp.mmap_db_index = nespd->mmap_db_index;
723 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
724 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
725 kfree(nespd);
726 return ERR_PTR(-EFAULT);
727 }
728
729 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
730 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
731 nesucontext->first_free_db = nespd->mmap_db_index + 1;
732 }
733
734 nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
735 return &nespd->ibpd;
736 }
737
738
739 /**
740 * nes_dealloc_pd
741 */
742 static int nes_dealloc_pd(struct ib_pd *ibpd)
743 {
744 struct nes_ucontext *nesucontext;
745 struct nes_pd *nespd = to_nespd(ibpd);
746 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
747 struct nes_device *nesdev = nesvnic->nesdev;
748 struct nes_adapter *nesadapter = nesdev->nesadapter;
749
750 if ((ibpd->uobject) && (ibpd->uobject->context)) {
751 nesucontext = to_nesucontext(ibpd->uobject->context);
752 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
753 nespd->mmap_db_index);
754 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
755 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
756 if (nesucontext->first_free_db > nespd->mmap_db_index) {
757 nesucontext->first_free_db = nespd->mmap_db_index;
758 }
759 }
760
761 nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
762 nespd->pd_id, nespd);
763 nes_free_resource(nesadapter, nesadapter->allocated_pds,
764 (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
765 kfree(nespd);
766
767 return 0;
768 }
769
770
771 /**
772 * nes_create_ah
773 */
774 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
775 {
776 return ERR_PTR(-ENOSYS);
777 }
778
779
780 /**
781 * nes_destroy_ah
782 */
783 static int nes_destroy_ah(struct ib_ah *ah)
784 {
785 return -ENOSYS;
786 }
787
788
789 /**
790 * nes_get_encoded_size
791 */
792 static inline u8 nes_get_encoded_size(int *size)
793 {
794 u8 encoded_size = 0;
795 if (*size <= 32) {
796 *size = 32;
797 encoded_size = 1;
798 } else if (*size <= 128) {
799 *size = 128;
800 encoded_size = 2;
801 } else if (*size <= 512) {
802 *size = 512;
803 encoded_size = 3;
804 }
805 return (encoded_size);
806 }
807
808
809
810 /**
811 * nes_setup_virt_qp
812 */
813 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
814 struct nes_vnic *nesvnic, int sq_size, int rq_size)
815 {
816 unsigned long flags;
817 void *mem;
818 __le64 *pbl = NULL;
819 __le64 *tpbl;
820 __le64 *pblbuffer;
821 struct nes_device *nesdev = nesvnic->nesdev;
822 struct nes_adapter *nesadapter = nesdev->nesadapter;
823 u32 pbl_entries;
824 u8 rq_pbl_entries;
825 u8 sq_pbl_entries;
826
827 pbl_entries = nespbl->pbl_size >> 3;
828 nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
829 nespbl->pbl_size, pbl_entries,
830 (void *)nespbl->pbl_vbase,
831 (unsigned long) nespbl->pbl_pbase);
832 pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
833 /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
834 /* the first pbl to be fro the rq_vbase... */
835 rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
836 sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
837 nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
838 if (!nespbl->page) {
839 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
840 kfree(nespbl);
841 return -ENOMEM;
842 }
843
844 nesqp->hwqp.sq_vbase = kmap(nespbl->page);
845 nesqp->page = nespbl->page;
846 if (!nesqp->hwqp.sq_vbase) {
847 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
848 kfree(nespbl);
849 return -ENOMEM;
850 }
851
852 /* Now to get to sq.. we need to calculate how many */
853 /* PBL entries were used by the rq.. */
854 pbl += sq_pbl_entries;
855 nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
856 /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
857 /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
858
859 nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
860 nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
861 nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
862 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
863 if (!nesadapter->free_256pbl) {
864 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
865 nespbl->pbl_pbase);
866 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
867 kunmap(nesqp->page);
868 kfree(nespbl);
869 return -ENOMEM;
870 }
871 nesadapter->free_256pbl--;
872 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
873
874 nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
875 pblbuffer = nesqp->pbl_vbase;
876 if (!nesqp->pbl_vbase) {
877 /* memory allocated during nes_reg_user_mr() */
878 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
879 nespbl->pbl_pbase);
880 kfree(nespbl);
881 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
882 nesadapter->free_256pbl++;
883 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
884 kunmap(nesqp->page);
885 return -ENOMEM;
886 }
887 memset(nesqp->pbl_vbase, 0, 256);
888 /* fill in the page address in the pbl buffer.. */
889 tpbl = pblbuffer + 16;
890 pbl = (__le64 *)nespbl->pbl_vbase;
891 while (sq_pbl_entries--)
892 *tpbl++ = *pbl++;
893 tpbl = pblbuffer;
894 while (rq_pbl_entries--)
895 *tpbl++ = *pbl++;
896
897 /* done with memory allocated during nes_reg_user_mr() */
898 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
899 nespbl->pbl_pbase);
900 kfree(nespbl);
901
902 nesqp->qp_mem_size =
903 max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256; /* this is Q2 */
904 /* Round up to a multiple of a page */
905 nesqp->qp_mem_size += PAGE_SIZE - 1;
906 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
907
908 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
909 &nesqp->hwqp.q2_pbase);
910
911 if (!mem) {
912 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
913 nesqp->pbl_vbase = NULL;
914 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
915 nesadapter->free_256pbl++;
916 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
917 kunmap(nesqp->page);
918 return -ENOMEM;
919 }
920 nesqp->sq_kmapped = 1;
921 nesqp->hwqp.q2_vbase = mem;
922 mem += 256;
923 memset(nesqp->hwqp.q2_vbase, 0, 256);
924 nesqp->nesqp_context = mem;
925 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
926 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
927
928 return 0;
929 }
930
931
932 /**
933 * nes_setup_mmap_qp
934 */
935 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
936 int sq_size, int rq_size)
937 {
938 void *mem;
939 struct nes_device *nesdev = nesvnic->nesdev;
940
941 nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
942 (sizeof(struct nes_hw_qp_wqe) * rq_size) +
943 max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
944 256; /* this is Q2 */
945 /* Round up to a multiple of a page */
946 nesqp->qp_mem_size += PAGE_SIZE - 1;
947 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
948
949 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
950 &nesqp->hwqp.sq_pbase);
951 if (!mem)
952 return -ENOMEM;
953 nes_debug(NES_DBG_QP, "PCI consistent memory for "
954 "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
955 mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
956
957 memset(mem, 0, nesqp->qp_mem_size);
958
959 nesqp->hwqp.sq_vbase = mem;
960 mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
961
962 nesqp->hwqp.rq_vbase = mem;
963 nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
964 sizeof(struct nes_hw_qp_wqe) * sq_size;
965 mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
966
967 nesqp->hwqp.q2_vbase = mem;
968 nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
969 sizeof(struct nes_hw_qp_wqe) * rq_size;
970 mem += 256;
971 memset(nesqp->hwqp.q2_vbase, 0, 256);
972
973 nesqp->nesqp_context = mem;
974 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
975 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
976 return 0;
977 }
978
979
980 /**
981 * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
982 */
983 static inline void nes_free_qp_mem(struct nes_device *nesdev,
984 struct nes_qp *nesqp, int virt_wqs)
985 {
986 unsigned long flags;
987 struct nes_adapter *nesadapter = nesdev->nesadapter;
988 if (!virt_wqs) {
989 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
990 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
991 }else {
992 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
993 nesadapter->free_256pbl++;
994 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
995 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
996 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
997 nesqp->pbl_vbase = NULL;
998 if (nesqp->sq_kmapped) {
999 nesqp->sq_kmapped = 0;
1000 kunmap(nesqp->page);
1001 }
1002 }
1003 }
1004
1005
1006 /**
1007 * nes_create_qp
1008 */
1009 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1010 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1011 {
1012 u64 u64temp= 0;
1013 u64 u64nesqp = 0;
1014 struct nes_pd *nespd = to_nespd(ibpd);
1015 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1016 struct nes_device *nesdev = nesvnic->nesdev;
1017 struct nes_adapter *nesadapter = nesdev->nesadapter;
1018 struct nes_qp *nesqp;
1019 struct nes_cq *nescq;
1020 struct nes_ucontext *nes_ucontext;
1021 struct nes_hw_cqp_wqe *cqp_wqe;
1022 struct nes_cqp_request *cqp_request;
1023 struct nes_create_qp_req req;
1024 struct nes_create_qp_resp uresp;
1025 struct nes_pbl *nespbl = NULL;
1026 u32 qp_num = 0;
1027 u32 opcode = 0;
1028 /* u32 counter = 0; */
1029 void *mem;
1030 unsigned long flags;
1031 int ret;
1032 int err;
1033 int virt_wqs = 0;
1034 int sq_size;
1035 int rq_size;
1036 u8 sq_encoded_size;
1037 u8 rq_encoded_size;
1038 /* int counter; */
1039
1040 if (init_attr->create_flags)
1041 return ERR_PTR(-EINVAL);
1042
1043 atomic_inc(&qps_created);
1044 switch (init_attr->qp_type) {
1045 case IB_QPT_RC:
1046 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1047 init_attr->cap.max_inline_data = 0;
1048 } else {
1049 init_attr->cap.max_inline_data = 64;
1050 }
1051 sq_size = init_attr->cap.max_send_wr;
1052 rq_size = init_attr->cap.max_recv_wr;
1053
1054 /* check if the encoded sizes are OK or not... */
1055 sq_encoded_size = nes_get_encoded_size(&sq_size);
1056 rq_encoded_size = nes_get_encoded_size(&rq_size);
1057
1058 if ((!sq_encoded_size) || (!rq_encoded_size)) {
1059 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1060 rq_size, sq_size);
1061 return ERR_PTR(-EINVAL);
1062 }
1063
1064 init_attr->cap.max_send_wr = sq_size -2;
1065 init_attr->cap.max_recv_wr = rq_size -1;
1066 nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1067
1068 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1069 nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1070 if (ret) {
1071 return ERR_PTR(ret);
1072 }
1073
1074 /* Need 512 (actually now 1024) byte alignment on this structure */
1075 mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1076 if (!mem) {
1077 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1078 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1079 return ERR_PTR(-ENOMEM);
1080 }
1081 u64nesqp = (unsigned long)mem;
1082 u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1083 u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1084 u64nesqp &= ~u64temp;
1085 nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1086 /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p. Rounded to closest %u\n",
1087 nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1088 nesqp->allocated_buffer = mem;
1089
1090 if (udata) {
1091 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1092 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1093 kfree(nesqp->allocated_buffer);
1094 nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1095 return ERR_PTR(-EFAULT);
1096 }
1097 if (req.user_wqe_buffers) {
1098 virt_wqs = 1;
1099 }
1100 if (req.user_qp_buffer)
1101 nesqp->nesuqp_addr = req.user_qp_buffer;
1102 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1103 nesqp->user_mode = 1;
1104 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1105 if (virt_wqs) {
1106 err = 1;
1107 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1108 if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1109 list_del(&nespbl->list);
1110 err = 0;
1111 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1112 nespbl, nespbl->user_base);
1113 break;
1114 }
1115 }
1116 if (err) {
1117 nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1118 (long long unsigned int)req.user_wqe_buffers);
1119 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1120 kfree(nesqp->allocated_buffer);
1121 return ERR_PTR(-EFAULT);
1122 }
1123 }
1124
1125 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1126 nesqp->mmap_sq_db_index =
1127 find_next_zero_bit(nes_ucontext->allocated_wqs,
1128 NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1129 /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1130 nespd->mmap_db_index); */
1131 if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1132 nes_debug(NES_DBG_QP,
1133 "db index > max user regions, failing create QP\n");
1134 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1135 if (virt_wqs) {
1136 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1137 nespbl->pbl_pbase);
1138 kfree(nespbl);
1139 }
1140 kfree(nesqp->allocated_buffer);
1141 return ERR_PTR(-ENOMEM);
1142 }
1143 set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1144 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1145 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1146 } else {
1147 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1148 kfree(nesqp->allocated_buffer);
1149 return ERR_PTR(-EFAULT);
1150 }
1151 }
1152 err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1153 nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1154 if (err) {
1155 nes_debug(NES_DBG_QP,
1156 "error geting qp mem code = %d\n", err);
1157 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1158 kfree(nesqp->allocated_buffer);
1159 return ERR_PTR(-ENOMEM);
1160 }
1161
1162 nesqp->hwqp.sq_size = sq_size;
1163 nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1164 nesqp->hwqp.sq_head = 1;
1165 nesqp->hwqp.rq_size = rq_size;
1166 nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1167 /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1168 (void *)nesqp->nesqp_context_pbase);
1169 */
1170 nesqp->hwqp.qp_id = qp_num;
1171 nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1172 nesqp->nespd = nespd;
1173
1174 nescq = to_nescq(init_attr->send_cq);
1175 nesqp->nesscq = nescq;
1176 nescq = to_nescq(init_attr->recv_cq);
1177 nesqp->nesrcq = nescq;
1178
1179 nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1180 NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1181 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1182 NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1183 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1184 NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1185 if (!udata) {
1186 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1187 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1188 }
1189 nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1190 ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1191 u64temp = (u64)nesqp->hwqp.sq_pbase;
1192 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1193 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1194
1195
1196 if (!virt_wqs) {
1197 u64temp = (u64)nesqp->hwqp.sq_pbase;
1198 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1199 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1200 u64temp = (u64)nesqp->hwqp.rq_pbase;
1201 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1202 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1203 } else {
1204 u64temp = (u64)nesqp->pbl_pbase;
1205 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1206 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1207 }
1208
1209 /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1210 nesvnic->next_qp_nic_index,
1211 nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1212 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1213 nesqp->nesqp_context->misc2 |= cpu_to_le32(
1214 (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1215 NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1216 nesvnic->next_qp_nic_index++;
1217 if ((nesvnic->next_qp_nic_index > 3) ||
1218 (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1219 nesvnic->next_qp_nic_index = 0;
1220 }
1221 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1222
1223 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1224 u64temp = (u64)nesqp->hwqp.q2_pbase;
1225 nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1226 nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1227 nesqp->nesqp_context->aeq_token_low = cpu_to_le32((u32)((unsigned long)(nesqp)));
1228 nesqp->nesqp_context->aeq_token_high = cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1229 nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1230 NES_QPCONTEXT_ORDIRD_AAH |
1231 ((((u32)nesadapter->max_irrq_wr) <<
1232 NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1233 if (disable_mpa_crc) {
1234 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1235 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1236 }
1237
1238
1239 /* Create the QP */
1240 cqp_request = nes_get_cqp_request(nesdev);
1241 if (cqp_request == NULL) {
1242 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1243 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1244 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1245 kfree(nesqp->allocated_buffer);
1246 return ERR_PTR(-ENOMEM);
1247 }
1248 cqp_request->waiting = 1;
1249 cqp_wqe = &cqp_request->cqp_wqe;
1250
1251 if (!virt_wqs) {
1252 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1253 NES_CQP_QP_IWARP_STATE_IDLE;
1254 } else {
1255 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1256 NES_CQP_QP_IWARP_STATE_IDLE;
1257 }
1258 opcode |= NES_CQP_QP_CQS_VALID;
1259 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1260 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1261 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1262
1263 u64temp = (u64)nesqp->nesqp_context_pbase;
1264 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1265
1266 atomic_set(&cqp_request->refcount, 2);
1267 nes_post_cqp_request(nesdev, cqp_request);
1268
1269 /* Wait for CQP */
1270 nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1271 nesqp->hwqp.qp_id);
1272 ret = wait_event_timeout(cqp_request->waitq,
1273 (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1274 nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1275 " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1276 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1277 nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1278 cqp_request->major_code, cqp_request->minor_code);
1279 if ((!ret) || (cqp_request->major_code)) {
1280 nes_put_cqp_request(nesdev, cqp_request);
1281 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1282 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1283 kfree(nesqp->allocated_buffer);
1284 if (!ret) {
1285 return ERR_PTR(-ETIME);
1286 } else {
1287 return ERR_PTR(-EIO);
1288 }
1289 }
1290
1291 nes_put_cqp_request(nesdev, cqp_request);
1292
1293 if (ibpd->uobject) {
1294 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1295 uresp.mmap_rq_db_index = 0;
1296 uresp.actual_sq_size = sq_size;
1297 uresp.actual_rq_size = rq_size;
1298 uresp.qp_id = nesqp->hwqp.qp_id;
1299 uresp.nes_drv_opt = nes_drv_opt;
1300 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1301 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1302 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1303 kfree(nesqp->allocated_buffer);
1304 return ERR_PTR(-EFAULT);
1305 }
1306 }
1307
1308 nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1309 nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1310 spin_lock_init(&nesqp->lock);
1311 nes_add_ref(&nesqp->ibqp);
1312 break;
1313 default:
1314 nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1315 return ERR_PTR(-EINVAL);
1316 }
1317
1318 nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1319 init_timer(&nesqp->terminate_timer);
1320 nesqp->terminate_timer.function = nes_terminate_timeout;
1321 nesqp->terminate_timer.data = (unsigned long)nesqp;
1322
1323 /* update the QP table */
1324 nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1325 nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1326 netdev_refcnt_read(nesvnic->netdev));
1327
1328 return &nesqp->ibqp;
1329 }
1330
1331 /**
1332 * nes_clean_cq
1333 */
1334 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1335 {
1336 u32 cq_head;
1337 u32 lo;
1338 u32 hi;
1339 u64 u64temp;
1340 unsigned long flags = 0;
1341
1342 spin_lock_irqsave(&nescq->lock, flags);
1343
1344 cq_head = nescq->hw_cq.cq_head;
1345 while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1346 rmb();
1347 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1348 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1349 u64temp = (((u64)hi) << 32) | ((u64)lo);
1350 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1351 if (u64temp == (u64)(unsigned long)nesqp) {
1352 /* Zero the context value so cqe will be ignored */
1353 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1354 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1355 }
1356
1357 if (++cq_head >= nescq->hw_cq.cq_size)
1358 cq_head = 0;
1359 }
1360
1361 spin_unlock_irqrestore(&nescq->lock, flags);
1362 }
1363
1364
1365 /**
1366 * nes_destroy_qp
1367 */
1368 static int nes_destroy_qp(struct ib_qp *ibqp)
1369 {
1370 struct nes_qp *nesqp = to_nesqp(ibqp);
1371 struct nes_ucontext *nes_ucontext;
1372 struct ib_qp_attr attr;
1373 struct iw_cm_id *cm_id;
1374 struct iw_cm_event cm_event;
1375 int ret = 0;
1376
1377 atomic_inc(&sw_qps_destroyed);
1378 nesqp->destroyed = 1;
1379
1380 /* Blow away the connection if it exists. */
1381 if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1382 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1383 attr.qp_state = IB_QPS_ERR;
1384 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1385 }
1386
1387 if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1388 (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1389 cm_id = nesqp->cm_id;
1390 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1391 cm_event.status = -ETIMEDOUT;
1392 cm_event.local_addr = cm_id->local_addr;
1393 cm_event.remote_addr = cm_id->remote_addr;
1394 cm_event.private_data = NULL;
1395 cm_event.private_data_len = 0;
1396
1397 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1398 "QP%u. cm_id = %p, refcount = %u. \n",
1399 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1400
1401 cm_id->rem_ref(cm_id);
1402 ret = cm_id->event_handler(cm_id, &cm_event);
1403 if (ret)
1404 nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1405 }
1406
1407 if (nesqp->user_mode) {
1408 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1409 nes_ucontext = to_nesucontext(ibqp->uobject->context);
1410 clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1411 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1412 if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1413 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1414 }
1415 }
1416 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1417 nesqp->sq_kmapped = 0;
1418 kunmap(nesqp->page);
1419 }
1420 } else {
1421 /* Clean any pending completions from the cq(s) */
1422 if (nesqp->nesscq)
1423 nes_clean_cq(nesqp, nesqp->nesscq);
1424
1425 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1426 nes_clean_cq(nesqp, nesqp->nesrcq);
1427 }
1428 nes_rem_ref(&nesqp->ibqp);
1429 return 0;
1430 }
1431
1432
1433 /**
1434 * nes_create_cq
1435 */
1436 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1437 const struct ib_cq_init_attr *attr,
1438 struct ib_ucontext *context,
1439 struct ib_udata *udata)
1440 {
1441 int entries = attr->cqe;
1442 u64 u64temp;
1443 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1444 struct nes_device *nesdev = nesvnic->nesdev;
1445 struct nes_adapter *nesadapter = nesdev->nesadapter;
1446 struct nes_cq *nescq;
1447 struct nes_ucontext *nes_ucontext = NULL;
1448 struct nes_cqp_request *cqp_request;
1449 void *mem = NULL;
1450 struct nes_hw_cqp_wqe *cqp_wqe;
1451 struct nes_pbl *nespbl = NULL;
1452 struct nes_create_cq_req req;
1453 struct nes_create_cq_resp resp;
1454 u32 cq_num = 0;
1455 u32 opcode = 0;
1456 u32 pbl_entries = 1;
1457 int err;
1458 unsigned long flags;
1459 int ret;
1460
1461 if (attr->flags)
1462 return ERR_PTR(-EINVAL);
1463
1464 if (entries > nesadapter->max_cqe)
1465 return ERR_PTR(-EINVAL);
1466
1467 err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1468 nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1469 if (err) {
1470 return ERR_PTR(err);
1471 }
1472
1473 nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1474 if (!nescq) {
1475 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1476 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1477 return ERR_PTR(-ENOMEM);
1478 }
1479
1480 nescq->hw_cq.cq_size = max(entries + 1, 5);
1481 nescq->hw_cq.cq_number = cq_num;
1482 nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1483
1484
1485 if (context) {
1486 nes_ucontext = to_nesucontext(context);
1487 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1488 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1489 kfree(nescq);
1490 return ERR_PTR(-EFAULT);
1491 }
1492 nesvnic->mcrq_ucontext = nes_ucontext;
1493 nes_ucontext->mcrqf = req.mcrqf;
1494 if (nes_ucontext->mcrqf) {
1495 if (nes_ucontext->mcrqf & 0x80000000)
1496 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1497 else if (nes_ucontext->mcrqf & 0x40000000)
1498 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1499 else
1500 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1501 nescq->mcrqf = nes_ucontext->mcrqf;
1502 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1503 }
1504 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1505 (unsigned long)req.user_cq_buffer, entries);
1506 err = 1;
1507 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1508 if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1509 list_del(&nespbl->list);
1510 err = 0;
1511 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1512 nespbl);
1513 break;
1514 }
1515 }
1516 if (err) {
1517 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1518 kfree(nescq);
1519 return ERR_PTR(-EFAULT);
1520 }
1521
1522 pbl_entries = nespbl->pbl_size >> 3;
1523 nescq->cq_mem_size = 0;
1524 } else {
1525 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1526 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1527 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1528
1529 /* allocate the physical buffer space */
1530 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1531 &nescq->hw_cq.cq_pbase);
1532 if (!mem) {
1533 printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1534 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1535 kfree(nescq);
1536 return ERR_PTR(-ENOMEM);
1537 }
1538
1539 nescq->hw_cq.cq_vbase = mem;
1540 nescq->hw_cq.cq_head = 0;
1541 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1542 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1543 (u32)nescq->hw_cq.cq_pbase);
1544 }
1545
1546 nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1547 spin_lock_init(&nescq->lock);
1548
1549 /* send CreateCQ request to CQP */
1550 cqp_request = nes_get_cqp_request(nesdev);
1551 if (cqp_request == NULL) {
1552 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1553 if (!context)
1554 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1555 nescq->hw_cq.cq_pbase);
1556 else {
1557 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1558 nespbl->pbl_vbase, nespbl->pbl_pbase);
1559 kfree(nespbl);
1560 }
1561
1562 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1563 kfree(nescq);
1564 return ERR_PTR(-ENOMEM);
1565 }
1566 cqp_request->waiting = 1;
1567 cqp_wqe = &cqp_request->cqp_wqe;
1568
1569 opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1570 NES_CQP_CQ_CHK_OVERFLOW |
1571 NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1572
1573 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1574
1575 if (pbl_entries != 1) {
1576 if (pbl_entries > 32) {
1577 /* use 4k pbl */
1578 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1579 if (nesadapter->free_4kpbl == 0) {
1580 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1581 nes_free_cqp_request(nesdev, cqp_request);
1582 if (!context)
1583 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1584 nescq->hw_cq.cq_pbase);
1585 else {
1586 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1587 nespbl->pbl_vbase, nespbl->pbl_pbase);
1588 kfree(nespbl);
1589 }
1590 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1591 kfree(nescq);
1592 return ERR_PTR(-ENOMEM);
1593 } else {
1594 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1595 nescq->virtual_cq = 2;
1596 nesadapter->free_4kpbl--;
1597 }
1598 } else {
1599 /* use 256 byte pbl */
1600 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1601 if (nesadapter->free_256pbl == 0) {
1602 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1603 nes_free_cqp_request(nesdev, cqp_request);
1604 if (!context)
1605 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1606 nescq->hw_cq.cq_pbase);
1607 else {
1608 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1609 nespbl->pbl_vbase, nespbl->pbl_pbase);
1610 kfree(nespbl);
1611 }
1612 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1613 kfree(nescq);
1614 return ERR_PTR(-ENOMEM);
1615 } else {
1616 opcode |= NES_CQP_CQ_VIRT;
1617 nescq->virtual_cq = 1;
1618 nesadapter->free_256pbl--;
1619 }
1620 }
1621 }
1622
1623 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1624
1625 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1626 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1627 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1628 (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1629
1630 if (context) {
1631 if (pbl_entries != 1)
1632 u64temp = (u64)nespbl->pbl_pbase;
1633 else
1634 u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1635 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1636 nes_ucontext->mmap_db_index[0]);
1637 } else {
1638 u64temp = (u64)nescq->hw_cq.cq_pbase;
1639 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1640 }
1641 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1642 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1643 u64temp = (u64)(unsigned long)&nescq->hw_cq;
1644 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1645 cpu_to_le32((u32)(u64temp >> 1));
1646 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1647 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1648
1649 atomic_set(&cqp_request->refcount, 2);
1650 nes_post_cqp_request(nesdev, cqp_request);
1651
1652 /* Wait for CQP */
1653 nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1654 nescq->hw_cq.cq_number);
1655 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1656 NES_EVENT_TIMEOUT * 2);
1657 nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1658 nescq->hw_cq.cq_number, ret);
1659 if ((!ret) || (cqp_request->major_code)) {
1660 nes_put_cqp_request(nesdev, cqp_request);
1661 if (!context)
1662 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1663 nescq->hw_cq.cq_pbase);
1664 else {
1665 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1666 nespbl->pbl_vbase, nespbl->pbl_pbase);
1667 kfree(nespbl);
1668 }
1669 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1670 kfree(nescq);
1671 return ERR_PTR(-EIO);
1672 }
1673 nes_put_cqp_request(nesdev, cqp_request);
1674
1675 if (context) {
1676 /* free the nespbl */
1677 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1678 nespbl->pbl_pbase);
1679 kfree(nespbl);
1680 resp.cq_id = nescq->hw_cq.cq_number;
1681 resp.cq_size = nescq->hw_cq.cq_size;
1682 resp.mmap_db_index = 0;
1683 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1684 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1685 kfree(nescq);
1686 return ERR_PTR(-EFAULT);
1687 }
1688 }
1689
1690 return &nescq->ibcq;
1691 }
1692
1693
1694 /**
1695 * nes_destroy_cq
1696 */
1697 static int nes_destroy_cq(struct ib_cq *ib_cq)
1698 {
1699 struct nes_cq *nescq;
1700 struct nes_device *nesdev;
1701 struct nes_vnic *nesvnic;
1702 struct nes_adapter *nesadapter;
1703 struct nes_hw_cqp_wqe *cqp_wqe;
1704 struct nes_cqp_request *cqp_request;
1705 unsigned long flags;
1706 u32 opcode = 0;
1707 int ret;
1708
1709 if (ib_cq == NULL)
1710 return 0;
1711
1712 nescq = to_nescq(ib_cq);
1713 nesvnic = to_nesvnic(ib_cq->device);
1714 nesdev = nesvnic->nesdev;
1715 nesadapter = nesdev->nesadapter;
1716
1717 nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1718
1719 /* Send DestroyCQ request to CQP */
1720 cqp_request = nes_get_cqp_request(nesdev);
1721 if (cqp_request == NULL) {
1722 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1723 return -ENOMEM;
1724 }
1725 cqp_request->waiting = 1;
1726 cqp_wqe = &cqp_request->cqp_wqe;
1727 opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1728 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1729 if (nescq->virtual_cq == 1) {
1730 nesadapter->free_256pbl++;
1731 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1732 printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1733 __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1734 }
1735 } else if (nescq->virtual_cq == 2) {
1736 nesadapter->free_4kpbl++;
1737 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1738 printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1739 __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1740 }
1741 opcode |= NES_CQP_CQ_4KB_CHUNK;
1742 }
1743
1744 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1745
1746 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1747 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1748 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1749 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1750 if (!nescq->mcrqf)
1751 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1752
1753 atomic_set(&cqp_request->refcount, 2);
1754 nes_post_cqp_request(nesdev, cqp_request);
1755
1756 /* Wait for CQP */
1757 nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1758 nescq->hw_cq.cq_number);
1759 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1760 NES_EVENT_TIMEOUT);
1761 nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1762 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1763 nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1764 cqp_request->minor_code);
1765 if (!ret) {
1766 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1767 nescq->hw_cq.cq_number);
1768 ret = -ETIME;
1769 } else if (cqp_request->major_code) {
1770 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1771 nescq->hw_cq.cq_number);
1772 ret = -EIO;
1773 } else {
1774 ret = 0;
1775 }
1776 nes_put_cqp_request(nesdev, cqp_request);
1777
1778 if (nescq->cq_mem_size)
1779 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1780 nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1781 kfree(nescq);
1782
1783 return ret;
1784 }
1785
1786 /**
1787 * root_256
1788 */
1789 static u32 root_256(struct nes_device *nesdev,
1790 struct nes_root_vpbl *root_vpbl,
1791 struct nes_root_vpbl *new_root,
1792 u16 pbl_count_4k)
1793 {
1794 u64 leaf_pbl;
1795 int i, j, k;
1796
1797 if (pbl_count_4k == 1) {
1798 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1799 512, &new_root->pbl_pbase);
1800
1801 if (new_root->pbl_vbase == NULL)
1802 return 0;
1803
1804 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1805 for (i = 0; i < 16; i++) {
1806 new_root->pbl_vbase[i].pa_low =
1807 cpu_to_le32((u32)leaf_pbl);
1808 new_root->pbl_vbase[i].pa_high =
1809 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1810 leaf_pbl += 256;
1811 }
1812 } else {
1813 for (i = 3; i >= 0; i--) {
1814 j = i * 16;
1815 root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1816 leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1817 (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1818 << 32);
1819 for (k = 1; k < 16; k++) {
1820 leaf_pbl += 256;
1821 root_vpbl->pbl_vbase[j + k].pa_low =
1822 cpu_to_le32((u32)leaf_pbl);
1823 root_vpbl->pbl_vbase[j + k].pa_high =
1824 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1825 }
1826 }
1827 }
1828
1829 return 1;
1830 }
1831
1832
1833 /**
1834 * nes_reg_mr
1835 */
1836 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1837 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1838 dma_addr_t single_buffer, u16 pbl_count_4k,
1839 u16 residual_page_count_4k, int acc, u64 *iova_start,
1840 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1841 {
1842 struct nes_hw_cqp_wqe *cqp_wqe;
1843 struct nes_cqp_request *cqp_request;
1844 unsigned long flags;
1845 int ret;
1846 struct nes_adapter *nesadapter = nesdev->nesadapter;
1847 uint pg_cnt = 0;
1848 u16 pbl_count_256 = 0;
1849 u16 pbl_count = 0;
1850 u8 use_256_pbls = 0;
1851 u8 use_4k_pbls = 0;
1852 u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1853 struct nes_root_vpbl new_root = { 0, NULL, NULL };
1854 u32 opcode = 0;
1855 u16 major_code;
1856
1857 /* Register the region with the adapter */
1858 cqp_request = nes_get_cqp_request(nesdev);
1859 if (cqp_request == NULL) {
1860 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1861 return -ENOMEM;
1862 }
1863 cqp_request->waiting = 1;
1864 cqp_wqe = &cqp_request->cqp_wqe;
1865
1866 if (pbl_count_4k) {
1867 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1868
1869 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1870 pbl_count_256 = (pg_cnt + 31) / 32;
1871 if (pg_cnt <= 32) {
1872 if (pbl_count_256 <= nesadapter->free_256pbl)
1873 use_256_pbls = 1;
1874 else if (pbl_count_4k <= nesadapter->free_4kpbl)
1875 use_4k_pbls = 1;
1876 } else if (pg_cnt <= 2048) {
1877 if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1878 (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1879 use_4k_pbls = 1;
1880 } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1881 use_256_pbls = 1;
1882 use_two_level = 1;
1883 } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1884 use_4k_pbls = 1;
1885 }
1886 } else {
1887 if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1888 use_4k_pbls = 1;
1889 }
1890
1891 if (use_256_pbls) {
1892 pbl_count = pbl_count_256;
1893 nesadapter->free_256pbl -= pbl_count + use_two_level;
1894 } else if (use_4k_pbls) {
1895 pbl_count = pbl_count_4k;
1896 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1897 } else {
1898 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1899 nes_debug(NES_DBG_MR, "Out of Pbls\n");
1900 nes_free_cqp_request(nesdev, cqp_request);
1901 return -ENOMEM;
1902 }
1903
1904 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1905 }
1906
1907 if (use_256_pbls && use_two_level) {
1908 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1909 if (new_root.pbl_pbase != 0)
1910 root_vpbl = &new_root;
1911 } else {
1912 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1913 nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1914 use_256_pbls = 0;
1915
1916 if (pbl_count_4k == 1)
1917 use_two_level = 0;
1918 pbl_count = pbl_count_4k;
1919
1920 if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1921 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1922 use_4k_pbls = 1;
1923 }
1924 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1925
1926 if (use_4k_pbls == 0)
1927 return -ENOMEM;
1928 }
1929 }
1930
1931 opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1932 NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1933 if (acc & IB_ACCESS_LOCAL_WRITE)
1934 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1935 if (acc & IB_ACCESS_REMOTE_WRITE)
1936 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1937 if (acc & IB_ACCESS_REMOTE_READ)
1938 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1939 if (acc & IB_ACCESS_MW_BIND)
1940 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1941
1942 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1943 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1944 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1945 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1946
1947 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1948 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1949 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1950 cpu_to_le32(nespd->pd_id & 0x00007fff);
1951 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1952
1953 if (pbl_count == 0) {
1954 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1955 } else {
1956 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1957 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1958 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1959
1960 if (use_4k_pbls)
1961 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1962 }
1963 barrier();
1964
1965 atomic_set(&cqp_request->refcount, 2);
1966 nes_post_cqp_request(nesdev, cqp_request);
1967
1968 /* Wait for CQP */
1969 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1970 NES_EVENT_TIMEOUT);
1971 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1972 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1973 stag, ret, cqp_request->major_code, cqp_request->minor_code);
1974 major_code = cqp_request->major_code;
1975 nes_put_cqp_request(nesdev, cqp_request);
1976
1977 if ((!ret || major_code) && pbl_count != 0) {
1978 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1979 if (use_256_pbls)
1980 nesadapter->free_256pbl += pbl_count + use_two_level;
1981 else if (use_4k_pbls)
1982 nesadapter->free_4kpbl += pbl_count + use_two_level;
1983 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1984 }
1985 if (new_root.pbl_pbase)
1986 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1987 new_root.pbl_pbase);
1988
1989 if (!ret)
1990 return -ETIME;
1991 else if (major_code)
1992 return -EIO;
1993
1994 *actual_pbl_cnt = pbl_count + use_two_level;
1995 *used_4k_pbls = use_4k_pbls;
1996 return 0;
1997 }
1998
1999
2000 /**
2001 * nes_reg_phys_mr
2002 */
2003 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
2004 int acc, u64 *iova_start)
2005 {
2006 u64 region_length;
2007 struct nes_pd *nespd = to_nespd(ib_pd);
2008 struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2009 struct nes_device *nesdev = nesvnic->nesdev;
2010 struct nes_adapter *nesadapter = nesdev->nesadapter;
2011 struct nes_mr *nesmr;
2012 struct ib_mr *ibmr;
2013 struct nes_vpbl vpbl;
2014 struct nes_root_vpbl root_vpbl;
2015 u32 stag;
2016 unsigned long mask;
2017 u32 stag_index = 0;
2018 u32 next_stag_index = 0;
2019 u32 driver_key = 0;
2020 int err = 0;
2021 int ret = 0;
2022 u16 pbl_count = 0;
2023 u8 single_page = 1;
2024 u8 stag_key = 0;
2025
2026 region_length = 0;
2027 vpbl.pbl_vbase = NULL;
2028 root_vpbl.pbl_vbase = NULL;
2029 root_vpbl.pbl_pbase = 0;
2030
2031 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2032 stag_key = (u8)next_stag_index;
2033
2034 driver_key = 0;
2035
2036 next_stag_index >>= 8;
2037 next_stag_index %= nesadapter->max_mr;
2038
2039 if ((addr ^ *iova_start) & ~PAGE_MASK)
2040 return ERR_PTR(-EINVAL);
2041
2042 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2043 &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2044 if (err) {
2045 return ERR_PTR(err);
2046 }
2047
2048 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2049 if (!nesmr) {
2050 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2051 return ERR_PTR(-ENOMEM);
2052 }
2053
2054 /* Allocate a 4K buffer for the PBL */
2055 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2056 &vpbl.pbl_pbase);
2057 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2058 vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2059 if (!vpbl.pbl_vbase) {
2060 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2061 ibmr = ERR_PTR(-ENOMEM);
2062 kfree(nesmr);
2063 goto reg_phys_err;
2064 }
2065
2066
2067 mask = !size;
2068
2069 if (mask & ~PAGE_MASK) {
2070 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2071 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2072 ibmr = ERR_PTR(-EINVAL);
2073 kfree(nesmr);
2074 goto reg_phys_err;
2075 }
2076
2077 region_length += size;
2078 vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2079 vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2080
2081 stag = stag_index << 8;
2082 stag |= driver_key;
2083 stag += (u32)stag_key;
2084
2085 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2086 " length = 0x%016lX, index = 0x%08X\n",
2087 stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2088
2089 /* Make the leaf PBL the root if only one PBL */
2090 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2091
2092 if (single_page) {
2093 pbl_count = 0;
2094 } else {
2095 pbl_count = 1;
2096 }
2097 ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2098 addr, pbl_count, 1, acc, iova_start,
2099 &nesmr->pbls_used, &nesmr->pbl_4k);
2100
2101 if (ret == 0) {
2102 nesmr->ibmr.rkey = stag;
2103 nesmr->ibmr.lkey = stag;
2104 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2105 ibmr = &nesmr->ibmr;
2106 } else {
2107 kfree(nesmr);
2108 ibmr = ERR_PTR(-ENOMEM);
2109 }
2110
2111 reg_phys_err:
2112 /* single PBL case */
2113 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2114 return ibmr;
2115 }
2116
2117
2118 /**
2119 * nes_get_dma_mr
2120 */
2121 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2122 {
2123 u64 kva = 0;
2124
2125 nes_debug(NES_DBG_MR, "\n");
2126
2127 return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2128 }
2129
2130 /**
2131 * nes_reg_user_mr
2132 */
2133 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2134 u64 virt, int acc, struct ib_udata *udata)
2135 {
2136 u64 iova_start;
2137 __le64 *pbl;
2138 u64 region_length;
2139 dma_addr_t last_dma_addr = 0;
2140 dma_addr_t first_dma_addr = 0;
2141 struct nes_pd *nespd = to_nespd(pd);
2142 struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2143 struct nes_device *nesdev = nesvnic->nesdev;
2144 struct nes_adapter *nesadapter = nesdev->nesadapter;
2145 struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2146 struct scatterlist *sg;
2147 struct nes_ucontext *nes_ucontext;
2148 struct nes_pbl *nespbl;
2149 struct nes_mr *nesmr;
2150 struct ib_umem *region;
2151 struct nes_mem_reg_req req;
2152 struct nes_vpbl vpbl;
2153 struct nes_root_vpbl root_vpbl;
2154 int entry, page_index;
2155 int page_count = 0;
2156 int err, pbl_depth = 0;
2157 int chunk_pages;
2158 int ret;
2159 u32 stag;
2160 u32 stag_index = 0;
2161 u32 next_stag_index;
2162 u32 driver_key;
2163 u32 root_pbl_index = 0;
2164 u32 cur_pbl_index = 0;
2165 u32 skip_pages;
2166 u16 pbl_count;
2167 u8 single_page = 1;
2168 u8 stag_key;
2169 int first_page = 1;
2170
2171 region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2172 if (IS_ERR(region)) {
2173 return (struct ib_mr *)region;
2174 }
2175
2176 nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2177 " offset = %u, page size = %u.\n",
2178 (unsigned long int)start, (unsigned long int)virt, (u32)length,
2179 ib_umem_offset(region), region->page_size);
2180
2181 skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2182
2183 if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2184 ib_umem_release(region);
2185 return ERR_PTR(-EFAULT);
2186 }
2187 nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2188
2189 switch (req.reg_type) {
2190 case IWNES_MEMREG_TYPE_MEM:
2191 pbl_depth = 0;
2192 region_length = 0;
2193 vpbl.pbl_vbase = NULL;
2194 root_vpbl.pbl_vbase = NULL;
2195 root_vpbl.pbl_pbase = 0;
2196
2197 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2198 stag_key = (u8)next_stag_index;
2199
2200 driver_key = next_stag_index & 0x70000000;
2201
2202 next_stag_index >>= 8;
2203 next_stag_index %= nesadapter->max_mr;
2204
2205 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2206 nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2207 if (err) {
2208 ib_umem_release(region);
2209 return ERR_PTR(err);
2210 }
2211
2212 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2213 if (!nesmr) {
2214 ib_umem_release(region);
2215 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2216 return ERR_PTR(-ENOMEM);
2217 }
2218 nesmr->region = region;
2219
2220 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2221 if (sg_dma_address(sg) & ~PAGE_MASK) {
2222 ib_umem_release(region);
2223 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2224 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2225 (unsigned int) sg_dma_address(sg));
2226 ibmr = ERR_PTR(-EINVAL);
2227 kfree(nesmr);
2228 goto reg_user_mr_err;
2229 }
2230
2231 if (!sg_dma_len(sg)) {
2232 ib_umem_release(region);
2233 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2234 stag_index);
2235 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2236 ibmr = ERR_PTR(-EINVAL);
2237 kfree(nesmr);
2238 goto reg_user_mr_err;
2239 }
2240
2241 region_length += sg_dma_len(sg);
2242 chunk_pages = sg_dma_len(sg) >> 12;
2243 region_length -= skip_pages << 12;
2244 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2245 skip_pages = 0;
2246 if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2247 goto enough_pages;
2248 if ((page_count&0x01FF) == 0) {
2249 if (page_count >= 1024 * 512) {
2250 ib_umem_release(region);
2251 nes_free_resource(nesadapter,
2252 nesadapter->allocated_mrs, stag_index);
2253 kfree(nesmr);
2254 ibmr = ERR_PTR(-E2BIG);
2255 goto reg_user_mr_err;
2256 }
2257 if (root_pbl_index == 1) {
2258 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2259 8192, &root_vpbl.pbl_pbase);
2260 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2261 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2262 if (!root_vpbl.pbl_vbase) {
2263 ib_umem_release(region);
2264 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2265 vpbl.pbl_pbase);
2266 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2267 stag_index);
2268 kfree(nesmr);
2269 ibmr = ERR_PTR(-ENOMEM);
2270 goto reg_user_mr_err;
2271 }
2272 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2273 GFP_KERNEL);
2274 if (!root_vpbl.leaf_vpbl) {
2275 ib_umem_release(region);
2276 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2277 root_vpbl.pbl_pbase);
2278 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2279 vpbl.pbl_pbase);
2280 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2281 stag_index);
2282 kfree(nesmr);
2283 ibmr = ERR_PTR(-ENOMEM);
2284 goto reg_user_mr_err;
2285 }
2286 root_vpbl.pbl_vbase[0].pa_low =
2287 cpu_to_le32((u32)vpbl.pbl_pbase);
2288 root_vpbl.pbl_vbase[0].pa_high =
2289 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2290 root_vpbl.leaf_vpbl[0] = vpbl;
2291 }
2292 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2293 &vpbl.pbl_pbase);
2294 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2295 vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2296 if (!vpbl.pbl_vbase) {
2297 ib_umem_release(region);
2298 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2299 ibmr = ERR_PTR(-ENOMEM);
2300 kfree(nesmr);
2301 goto reg_user_mr_err;
2302 }
2303 if (1 <= root_pbl_index) {
2304 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2305 cpu_to_le32((u32)vpbl.pbl_pbase);
2306 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2307 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2308 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2309 }
2310 root_pbl_index++;
2311 cur_pbl_index = 0;
2312 }
2313 if (single_page) {
2314 if (page_count != 0) {
2315 if ((last_dma_addr+4096) !=
2316 (sg_dma_address(sg)+
2317 (page_index*4096)))
2318 single_page = 0;
2319 last_dma_addr = sg_dma_address(sg)+
2320 (page_index*4096);
2321 } else {
2322 first_dma_addr = sg_dma_address(sg)+
2323 (page_index*4096);
2324 last_dma_addr = first_dma_addr;
2325 }
2326 }
2327
2328 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2329 cpu_to_le32((u32)(sg_dma_address(sg)+
2330 (page_index*4096)));
2331 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2332 cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2333 (page_index*4096))) >> 32)));
2334 cur_pbl_index++;
2335 page_count++;
2336 }
2337 }
2338
2339 enough_pages:
2340 nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2341 " stag_key=0x%08x\n",
2342 stag_index, driver_key, stag_key);
2343 stag = stag_index << 8;
2344 stag |= driver_key;
2345 stag += (u32)stag_key;
2346
2347 iova_start = virt;
2348 /* Make the leaf PBL the root if only one PBL */
2349 if (root_pbl_index == 1) {
2350 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2351 }
2352
2353 if (single_page) {
2354 pbl_count = 0;
2355 } else {
2356 pbl_count = root_pbl_index;
2357 first_dma_addr = 0;
2358 }
2359 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2360 " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2361 stag, (unsigned int)iova_start,
2362 (unsigned int)region_length, stag_index,
2363 (unsigned long long)region->length, pbl_count);
2364 ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2365 first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2366 &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2367
2368 nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2369
2370 if (ret == 0) {
2371 nesmr->ibmr.rkey = stag;
2372 nesmr->ibmr.lkey = stag;
2373 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2374 ibmr = &nesmr->ibmr;
2375 } else {
2376 ib_umem_release(region);
2377 kfree(nesmr);
2378 ibmr = ERR_PTR(-ENOMEM);
2379 }
2380
2381 reg_user_mr_err:
2382 /* free the resources */
2383 if (root_pbl_index == 1) {
2384 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2385 vpbl.pbl_pbase);
2386 } else {
2387 for (page_index=0; page_index<root_pbl_index; page_index++) {
2388 pci_free_consistent(nesdev->pcidev, 4096,
2389 root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2390 root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2391 }
2392 kfree(root_vpbl.leaf_vpbl);
2393 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2394 root_vpbl.pbl_pbase);
2395 }
2396
2397 nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2398
2399 return ibmr;
2400 case IWNES_MEMREG_TYPE_QP:
2401 case IWNES_MEMREG_TYPE_CQ:
2402 if (!region->length) {
2403 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2404 ib_umem_release(region);
2405 return ERR_PTR(-EINVAL);
2406 }
2407 nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2408 if (!nespbl) {
2409 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2410 ib_umem_release(region);
2411 return ERR_PTR(-ENOMEM);
2412 }
2413 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2414 if (!nesmr) {
2415 ib_umem_release(region);
2416 kfree(nespbl);
2417 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2418 return ERR_PTR(-ENOMEM);
2419 }
2420 nesmr->region = region;
2421 nes_ucontext = to_nesucontext(pd->uobject->context);
2422 pbl_depth = region->length >> 12;
2423 pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2424 nespbl->pbl_size = pbl_depth*sizeof(u64);
2425 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2426 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2427 } else {
2428 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2429 }
2430
2431 nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2432 nespbl->pbl_size, pbl_depth);
2433 pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2434 &nespbl->pbl_pbase);
2435 if (!pbl) {
2436 ib_umem_release(region);
2437 kfree(nesmr);
2438 kfree(nespbl);
2439 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2440 return ERR_PTR(-ENOMEM);
2441 }
2442
2443 nespbl->pbl_vbase = (u64 *)pbl;
2444 nespbl->user_base = start;
2445 nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2446 " pbl_vbase=%p user_base=0x%lx\n",
2447 nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2448 (void *) nespbl->pbl_vbase, nespbl->user_base);
2449
2450 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2451 chunk_pages = sg_dma_len(sg) >> 12;
2452 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2453 if (first_page) {
2454 nespbl->page = sg_page(sg);
2455 first_page = 0;
2456 }
2457
2458 for (page_index = 0; page_index < chunk_pages; page_index++) {
2459 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2460 (sg_dma_address(sg)+
2461 (page_index*4096)));
2462 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2463 (sg_dma_address(sg)+
2464 (page_index*4096)))>>32);
2465 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2466 (unsigned long long)*pbl,
2467 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2468 pbl++;
2469 }
2470 }
2471
2472 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2473 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2474 } else {
2475 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2476 }
2477 nesmr->ibmr.rkey = -1;
2478 nesmr->ibmr.lkey = -1;
2479 nesmr->mode = req.reg_type;
2480 return &nesmr->ibmr;
2481 }
2482
2483 ib_umem_release(region);
2484 return ERR_PTR(-ENOSYS);
2485 }
2486
2487
2488 /**
2489 * nes_dereg_mr
2490 */
2491 static int nes_dereg_mr(struct ib_mr *ib_mr)
2492 {
2493 struct nes_mr *nesmr = to_nesmr(ib_mr);
2494 struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2495 struct nes_device *nesdev = nesvnic->nesdev;
2496 struct nes_adapter *nesadapter = nesdev->nesadapter;
2497 struct nes_hw_cqp_wqe *cqp_wqe;
2498 struct nes_cqp_request *cqp_request;
2499 unsigned long flags;
2500 int ret;
2501 u16 major_code;
2502 u16 minor_code;
2503
2504
2505 if (nesmr->pages)
2506 pci_free_consistent(nesdev->pcidev,
2507 nesmr->max_pages * sizeof(u64),
2508 nesmr->pages,
2509 nesmr->paddr);
2510
2511 if (nesmr->region) {
2512 ib_umem_release(nesmr->region);
2513 }
2514 if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2515 kfree(nesmr);
2516 return 0;
2517 }
2518
2519 /* Deallocate the region with the adapter */
2520
2521 cqp_request = nes_get_cqp_request(nesdev);
2522 if (cqp_request == NULL) {
2523 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2524 return -ENOMEM;
2525 }
2526 cqp_request->waiting = 1;
2527 cqp_wqe = &cqp_request->cqp_wqe;
2528
2529 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2530 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2531 NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2532 NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2533 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2534
2535 atomic_set(&cqp_request->refcount, 2);
2536 nes_post_cqp_request(nesdev, cqp_request);
2537
2538 /* Wait for CQP */
2539 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2540 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2541 NES_EVENT_TIMEOUT);
2542 nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2543 " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2544 ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2545
2546 major_code = cqp_request->major_code;
2547 minor_code = cqp_request->minor_code;
2548
2549 nes_put_cqp_request(nesdev, cqp_request);
2550
2551 if (!ret) {
2552 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2553 " ib_mr=%p, rkey = 0x%08X\n",
2554 ib_mr, ib_mr->rkey);
2555 return -ETIME;
2556 } else if (major_code) {
2557 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2558 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2559 major_code, minor_code, ib_mr, ib_mr->rkey);
2560 return -EIO;
2561 }
2562
2563 if (nesmr->pbls_used != 0) {
2564 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2565 if (nesmr->pbl_4k) {
2566 nesadapter->free_4kpbl += nesmr->pbls_used;
2567 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2568 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2569 "exceeded the max(%u)\n",
2570 nesadapter->free_4kpbl,
2571 nesadapter->max_4kpbl);
2572 } else {
2573 nesadapter->free_256pbl += nesmr->pbls_used;
2574 if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2575 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2576 "exceeded the max(%u)\n",
2577 nesadapter->free_256pbl,
2578 nesadapter->max_256pbl);
2579 }
2580 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2581 }
2582 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2583 (ib_mr->rkey & 0x0fffff00) >> 8);
2584
2585 kfree(nesmr);
2586
2587 return 0;
2588 }
2589
2590
2591 /**
2592 * show_rev
2593 */
2594 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2595 char *buf)
2596 {
2597 struct nes_ib_device *nesibdev =
2598 container_of(dev, struct nes_ib_device, ibdev.dev);
2599 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2600
2601 nes_debug(NES_DBG_INIT, "\n");
2602 return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2603 }
2604
2605
2606 /**
2607 * show_fw_ver
2608 */
2609 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
2610 char *buf)
2611 {
2612 struct nes_ib_device *nesibdev =
2613 container_of(dev, struct nes_ib_device, ibdev.dev);
2614 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2615
2616 nes_debug(NES_DBG_INIT, "\n");
2617 return sprintf(buf, "%u.%u\n",
2618 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
2619 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
2620 }
2621
2622
2623 /**
2624 * show_hca
2625 */
2626 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2627 char *buf)
2628 {
2629 nes_debug(NES_DBG_INIT, "\n");
2630 return sprintf(buf, "NES020\n");
2631 }
2632
2633
2634 /**
2635 * show_board
2636 */
2637 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2638 char *buf)
2639 {
2640 nes_debug(NES_DBG_INIT, "\n");
2641 return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2642 }
2643
2644
2645 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2646 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2647 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2648 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2649
2650 static struct device_attribute *nes_dev_attributes[] = {
2651 &dev_attr_hw_rev,
2652 &dev_attr_fw_ver,
2653 &dev_attr_hca_type,
2654 &dev_attr_board_id
2655 };
2656
2657
2658 /**
2659 * nes_query_qp
2660 */
2661 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2662 int attr_mask, struct ib_qp_init_attr *init_attr)
2663 {
2664 struct nes_qp *nesqp = to_nesqp(ibqp);
2665
2666 nes_debug(NES_DBG_QP, "\n");
2667
2668 attr->qp_access_flags = 0;
2669 attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2670 attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2671 attr->cap.max_recv_sge = 1;
2672 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2673 attr->cap.max_inline_data = 0;
2674 else
2675 attr->cap.max_inline_data = 64;
2676
2677 init_attr->event_handler = nesqp->ibqp.event_handler;
2678 init_attr->qp_context = nesqp->ibqp.qp_context;
2679 init_attr->send_cq = nesqp->ibqp.send_cq;
2680 init_attr->recv_cq = nesqp->ibqp.recv_cq;
2681 init_attr->srq = nesqp->ibqp.srq;
2682 init_attr->cap = attr->cap;
2683
2684 return 0;
2685 }
2686
2687
2688 /**
2689 * nes_hw_modify_qp
2690 */
2691 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2692 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2693 {
2694 struct nes_hw_cqp_wqe *cqp_wqe;
2695 /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2696 /* struct iw_cm_event cm_event; */
2697 struct nes_cqp_request *cqp_request;
2698 int ret;
2699 u16 major_code;
2700
2701 nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2702 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2703
2704 cqp_request = nes_get_cqp_request(nesdev);
2705 if (cqp_request == NULL) {
2706 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2707 return -ENOMEM;
2708 }
2709 if (wait_completion) {
2710 cqp_request->waiting = 1;
2711 } else {
2712 cqp_request->waiting = 0;
2713 }
2714 cqp_wqe = &cqp_request->cqp_wqe;
2715
2716 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2717 NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2718 nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2719 next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2720 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2721 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2722 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2723
2724 /* If sending a terminate message, fill in the length (in words) */
2725 if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2726 !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2727 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2728 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2729 }
2730
2731 atomic_set(&cqp_request->refcount, 2);
2732 nes_post_cqp_request(nesdev, cqp_request);
2733
2734 /* Wait for CQP */
2735 if (wait_completion) {
2736 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2737 nesqp->hwqp.qp_id); */
2738 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2739 NES_EVENT_TIMEOUT);
2740 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2741 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2742 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2743 major_code = cqp_request->major_code;
2744 if (major_code) {
2745 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2746 "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2747 nesqp->hwqp.qp_id, cqp_request->major_code,
2748 cqp_request->minor_code, next_iwarp_state);
2749 }
2750
2751 nes_put_cqp_request(nesdev, cqp_request);
2752
2753 if (!ret)
2754 return -ETIME;
2755 else if (major_code)
2756 return -EIO;
2757 else
2758 return 0;
2759 } else {
2760 return 0;
2761 }
2762 }
2763
2764
2765 /**
2766 * nes_modify_qp
2767 */
2768 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2769 int attr_mask, struct ib_udata *udata)
2770 {
2771 struct nes_qp *nesqp = to_nesqp(ibqp);
2772 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2773 struct nes_device *nesdev = nesvnic->nesdev;
2774 /* u32 cqp_head; */
2775 /* u32 counter; */
2776 u32 next_iwarp_state = 0;
2777 int err;
2778 unsigned long qplockflags;
2779 int ret;
2780 u16 original_last_aeq;
2781 u8 issue_modify_qp = 0;
2782 u8 dont_wait = 0;
2783
2784 nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2785 " iwarp_state=0x%X, refcount=%d\n",
2786 nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2787 nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2788
2789 spin_lock_irqsave(&nesqp->lock, qplockflags);
2790
2791 nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2792 " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2793 nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2794 nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2795
2796 if (attr_mask & IB_QP_STATE) {
2797 switch (attr->qp_state) {
2798 case IB_QPS_INIT:
2799 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2800 nesqp->hwqp.qp_id);
2801 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2802 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2803 return -EINVAL;
2804 }
2805 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2806 issue_modify_qp = 1;
2807 break;
2808 case IB_QPS_RTR:
2809 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2810 nesqp->hwqp.qp_id);
2811 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2812 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2813 return -EINVAL;
2814 }
2815 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2816 issue_modify_qp = 1;
2817 break;
2818 case IB_QPS_RTS:
2819 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2820 nesqp->hwqp.qp_id);
2821 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2822 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2823 return -EINVAL;
2824 }
2825 if (nesqp->cm_id == NULL) {
2826 nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2827 nesqp->hwqp.qp_id );
2828 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2829 return -EINVAL;
2830 }
2831 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2832 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2833 next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2834 NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2835 issue_modify_qp = 1;
2836 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2837 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2838 nesqp->hte_added = 1;
2839 break;
2840 case IB_QPS_SQD:
2841 issue_modify_qp = 1;
2842 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2843 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2844 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2845 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2846 return 0;
2847 } else {
2848 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2849 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2850 " ignored due to current iWARP state\n",
2851 nesqp->hwqp.qp_id);
2852 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2853 return -EINVAL;
2854 }
2855 if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2856 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2857 " already done based on hw state.\n",
2858 nesqp->hwqp.qp_id);
2859 issue_modify_qp = 0;
2860 }
2861 switch (nesqp->hw_iwarp_state) {
2862 case NES_AEQE_IWARP_STATE_CLOSING:
2863 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2864 break;
2865 case NES_AEQE_IWARP_STATE_TERMINATE:
2866 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2867 break;
2868 case NES_AEQE_IWARP_STATE_ERROR:
2869 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2870 break;
2871 default:
2872 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2873 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2874 break;
2875 }
2876 }
2877 break;
2878 case IB_QPS_SQE:
2879 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2880 nesqp->hwqp.qp_id);
2881 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2882 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2883 return -EINVAL;
2884 }
2885 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2886 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2887 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2888 issue_modify_qp = 1;
2889 break;
2890 case IB_QPS_ERR:
2891 case IB_QPS_RESET:
2892 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2893 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2894 return -EINVAL;
2895 }
2896 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2897 nesqp->hwqp.qp_id);
2898 if (nesqp->term_flags)
2899 del_timer(&nesqp->terminate_timer);
2900
2901 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2902 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2903 if (nesqp->hte_added) {
2904 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2905 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2906 nesqp->hte_added = 0;
2907 }
2908 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2909 (nesdev->iw_status) &&
2910 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2911 next_iwarp_state |= NES_CQP_QP_RESET;
2912 } else {
2913 nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2914 nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2915 dont_wait = 1;
2916 }
2917 issue_modify_qp = 1;
2918 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2919 break;
2920 default:
2921 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2922 return -EINVAL;
2923 break;
2924 }
2925
2926 nesqp->ibqp_state = attr->qp_state;
2927 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2928 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2929 nesqp->iwarp_state);
2930 }
2931
2932 if (attr_mask & IB_QP_ACCESS_FLAGS) {
2933 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2934 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2935 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2936 issue_modify_qp = 1;
2937 }
2938 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2939 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2940 issue_modify_qp = 1;
2941 }
2942 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2943 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2944 issue_modify_qp = 1;
2945 }
2946 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2947 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2948 issue_modify_qp = 1;
2949 }
2950
2951 if (nesqp->user_mode) {
2952 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2953 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2954 issue_modify_qp = 1;
2955 }
2956 }
2957
2958 original_last_aeq = nesqp->last_aeq;
2959 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2960
2961 nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2962
2963 ret = 0;
2964
2965
2966 if (issue_modify_qp) {
2967 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2968 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2969 if (ret)
2970 nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2971 " failed for QP%u.\n",
2972 next_iwarp_state, nesqp->hwqp.qp_id);
2973
2974 }
2975
2976 if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2977 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2978 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2979 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2980 original_last_aeq, nesqp->last_aeq);
2981 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2982 if (dont_wait) {
2983 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2984 nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2985 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2986 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2987 original_last_aeq, nesqp->last_aeq);
2988 /* this one is for the cm_disconnect thread */
2989 spin_lock_irqsave(&nesqp->lock, qplockflags);
2990 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2991 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2992 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2993 nes_cm_disconn(nesqp);
2994 } else {
2995 nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2996 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2997 }
2998 } else {
2999 spin_lock_irqsave(&nesqp->lock, qplockflags);
3000 if (nesqp->cm_id) {
3001 /* These two are for the timer thread */
3002 if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3003 nesqp->cm_id->add_ref(nesqp->cm_id);
3004 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3005 " need ae to finish up, original_last_aeq = 0x%04X."
3006 " last_aeq = 0x%04X, scheduling timer.\n",
3007 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3008 original_last_aeq, nesqp->last_aeq);
3009 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3010 }
3011 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3012 } else {
3013 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3014 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3015 " need ae to finish up, original_last_aeq = 0x%04X."
3016 " last_aeq = 0x%04X.\n",
3017 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3018 original_last_aeq, nesqp->last_aeq);
3019 }
3020 }
3021 } else {
3022 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3023 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3024 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3025 original_last_aeq, nesqp->last_aeq);
3026 }
3027 } else {
3028 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3029 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3030 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3031 original_last_aeq, nesqp->last_aeq);
3032 }
3033
3034 err = 0;
3035
3036 nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3037 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3038
3039 return err;
3040 }
3041
3042
3043 /**
3044 * nes_muticast_attach
3045 */
3046 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3047 {
3048 nes_debug(NES_DBG_INIT, "\n");
3049 return -ENOSYS;
3050 }
3051
3052
3053 /**
3054 * nes_multicast_detach
3055 */
3056 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3057 {
3058 nes_debug(NES_DBG_INIT, "\n");
3059 return -ENOSYS;
3060 }
3061
3062
3063 /**
3064 * nes_process_mad
3065 */
3066 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3067 u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
3068 const struct ib_mad_hdr *in, size_t in_mad_size,
3069 struct ib_mad_hdr *out, size_t *out_mad_size,
3070 u16 *out_mad_pkey_index)
3071 {
3072 nes_debug(NES_DBG_INIT, "\n");
3073 return -ENOSYS;
3074 }
3075
3076 static inline void
3077 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3078 {
3079 int sge_index;
3080 int total_payload_length = 0;
3081 for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3082 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3083 ib_wr->sg_list[sge_index].addr);
3084 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3085 ib_wr->sg_list[sge_index].length);
3086 if (uselkey)
3087 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3088 (ib_wr->sg_list[sge_index].lkey));
3089 else
3090 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3091
3092 total_payload_length += ib_wr->sg_list[sge_index].length;
3093 }
3094 nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3095 total_payload_length);
3096 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3097 total_payload_length);
3098 }
3099
3100 /**
3101 * nes_post_send
3102 */
3103 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3104 struct ib_send_wr **bad_wr)
3105 {
3106 u64 u64temp;
3107 unsigned long flags = 0;
3108 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3109 struct nes_device *nesdev = nesvnic->nesdev;
3110 struct nes_qp *nesqp = to_nesqp(ibqp);
3111 struct nes_hw_qp_wqe *wqe;
3112 int err = 0;
3113 u32 qsize = nesqp->hwqp.sq_size;
3114 u32 head;
3115 u32 wqe_misc = 0;
3116 u32 wqe_count = 0;
3117 u32 counter;
3118
3119 if (nesqp->ibqp_state > IB_QPS_RTS) {
3120 err = -EINVAL;
3121 goto out;
3122 }
3123
3124 spin_lock_irqsave(&nesqp->lock, flags);
3125
3126 head = nesqp->hwqp.sq_head;
3127
3128 while (ib_wr) {
3129 /* Check for QP error */
3130 if (nesqp->term_flags) {
3131 err = -EINVAL;
3132 break;
3133 }
3134
3135 /* Check for SQ overflow */
3136 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3137 err = -ENOMEM;
3138 break;
3139 }
3140
3141 wqe = &nesqp->hwqp.sq_vbase[head];
3142 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3143 nesqp->hwqp.qp_id, wqe, head); */
3144 nes_fill_init_qp_wqe(wqe, nesqp, head);
3145 u64temp = (u64)(ib_wr->wr_id);
3146 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3147 u64temp);
3148 switch (ib_wr->opcode) {
3149 case IB_WR_SEND:
3150 case IB_WR_SEND_WITH_INV:
3151 if (IB_WR_SEND == ib_wr->opcode) {
3152 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3153 wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3154 else
3155 wqe_misc = NES_IWARP_SQ_OP_SEND;
3156 } else {
3157 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3158 wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3159 else
3160 wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3161
3162 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3163 ib_wr->ex.invalidate_rkey);
3164 }
3165
3166 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3167 err = -EINVAL;
3168 break;
3169 }
3170
3171 if (ib_wr->send_flags & IB_SEND_FENCE)
3172 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3173
3174 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3175 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3176 (ib_wr->sg_list[0].length <= 64)) {
3177 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3178 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3179 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3180 ib_wr->sg_list[0].length);
3181 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3182 } else {
3183 fill_wqe_sg_send(wqe, ib_wr, 1);
3184 }
3185
3186 break;
3187 case IB_WR_RDMA_WRITE:
3188 wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3189 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3190 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3191 ib_wr->num_sge, nesdev->nesadapter->max_sge);
3192 err = -EINVAL;
3193 break;
3194 }
3195
3196 if (ib_wr->send_flags & IB_SEND_FENCE)
3197 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3198
3199 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3200 rdma_wr(ib_wr)->rkey);
3201 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3202 rdma_wr(ib_wr)->remote_addr);
3203
3204 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3205 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3206 (ib_wr->sg_list[0].length <= 64)) {
3207 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3208 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3209 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3210 ib_wr->sg_list[0].length);
3211 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3212 } else {
3213 fill_wqe_sg_send(wqe, ib_wr, 1);
3214 }
3215
3216 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3217 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3218 break;
3219 case IB_WR_RDMA_READ:
3220 case IB_WR_RDMA_READ_WITH_INV:
3221 /* iWARP only supports 1 sge for RDMA reads */
3222 if (ib_wr->num_sge > 1) {
3223 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3224 ib_wr->num_sge);
3225 err = -EINVAL;
3226 break;
3227 }
3228 if (ib_wr->opcode == IB_WR_RDMA_READ) {
3229 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3230 } else {
3231 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3232 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3233 ib_wr->ex.invalidate_rkey);
3234 }
3235
3236 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3237 rdma_wr(ib_wr)->remote_addr);
3238 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3239 rdma_wr(ib_wr)->rkey);
3240 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3241 ib_wr->sg_list->length);
3242 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3243 ib_wr->sg_list->addr);
3244 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3245 ib_wr->sg_list->lkey);
3246 break;
3247 case IB_WR_LOCAL_INV:
3248 wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3249 set_wqe_32bit_value(wqe->wqe_words,
3250 NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3251 ib_wr->ex.invalidate_rkey);
3252 break;
3253 case IB_WR_REG_MR:
3254 {
3255 struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3256 int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3257 int flags = reg_wr(ib_wr)->access;
3258
3259 if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3260 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3261 err = -EINVAL;
3262 break;
3263 }
3264 wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3265 set_wqe_64bit_value(wqe->wqe_words,
3266 NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3267 mr->ibmr.iova);
3268 set_wqe_32bit_value(wqe->wqe_words,
3269 NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3270 mr->ibmr.length);
3271 set_wqe_32bit_value(wqe->wqe_words,
3272 NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3273 set_wqe_32bit_value(wqe->wqe_words,
3274 NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3275 reg_wr(ib_wr)->key);
3276
3277 if (page_shift == 12) {
3278 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3279 } else if (page_shift == 21) {
3280 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3281 } else {
3282 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3283 " ib_wr=%u, max=1\n", ib_wr->num_sge);
3284 err = -EINVAL;
3285 break;
3286 }
3287
3288 /* Set access_flags */
3289 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3290 if (flags & IB_ACCESS_LOCAL_WRITE)
3291 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3292
3293 if (flags & IB_ACCESS_REMOTE_WRITE)
3294 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3295
3296 if (flags & IB_ACCESS_REMOTE_READ)
3297 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3298
3299 if (flags & IB_ACCESS_MW_BIND)
3300 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3301
3302 /* Fill in PBL info: */
3303 set_wqe_64bit_value(wqe->wqe_words,
3304 NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3305 mr->paddr);
3306
3307 set_wqe_32bit_value(wqe->wqe_words,
3308 NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3309 mr->npages * 8);
3310
3311 nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3312 "length: %d, rkey: %0x, pgl_paddr: %llx, "
3313 "page_list_len: %u, wqe_misc: %x\n",
3314 (unsigned long long) mr->ibmr.iova,
3315 mr->ibmr.length,
3316 reg_wr(ib_wr)->key,
3317 (unsigned long long) mr->paddr,
3318 mr->npages,
3319 wqe_misc);
3320 break;
3321 }
3322 default:
3323 /* error */
3324 err = -EINVAL;
3325 break;
3326 }
3327
3328 if (err)
3329 break;
3330
3331 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3332 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3333
3334 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3335
3336 ib_wr = ib_wr->next;
3337 head++;
3338 wqe_count++;
3339 if (head >= qsize)
3340 head = 0;
3341
3342 }
3343
3344 nesqp->hwqp.sq_head = head;
3345 barrier();
3346 while (wqe_count) {
3347 counter = min(wqe_count, ((u32)255));
3348 wqe_count -= counter;
3349 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3350 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3351 }
3352
3353 spin_unlock_irqrestore(&nesqp->lock, flags);
3354
3355 out:
3356 if (err)
3357 *bad_wr = ib_wr;
3358 return err;
3359 }
3360
3361
3362 /**
3363 * nes_post_recv
3364 */
3365 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3366 struct ib_recv_wr **bad_wr)
3367 {
3368 u64 u64temp;
3369 unsigned long flags = 0;
3370 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3371 struct nes_device *nesdev = nesvnic->nesdev;
3372 struct nes_qp *nesqp = to_nesqp(ibqp);
3373 struct nes_hw_qp_wqe *wqe;
3374 int err = 0;
3375 int sge_index;
3376 u32 qsize = nesqp->hwqp.rq_size;
3377 u32 head;
3378 u32 wqe_count = 0;
3379 u32 counter;
3380 u32 total_payload_length;
3381
3382 if (nesqp->ibqp_state > IB_QPS_RTS) {
3383 err = -EINVAL;
3384 goto out;
3385 }
3386
3387 spin_lock_irqsave(&nesqp->lock, flags);
3388
3389 head = nesqp->hwqp.rq_head;
3390
3391 while (ib_wr) {
3392 /* Check for QP error */
3393 if (nesqp->term_flags) {
3394 err = -EINVAL;
3395 break;
3396 }
3397
3398 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3399 err = -EINVAL;
3400 break;
3401 }
3402 /* Check for RQ overflow */
3403 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3404 err = -ENOMEM;
3405 break;
3406 }
3407
3408 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3409 wqe = &nesqp->hwqp.rq_vbase[head];
3410
3411 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3412 nesqp->hwqp.qp_id, wqe, head); */
3413 nes_fill_init_qp_wqe(wqe, nesqp, head);
3414 u64temp = (u64)(ib_wr->wr_id);
3415 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3416 u64temp);
3417 total_payload_length = 0;
3418 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3419 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3420 ib_wr->sg_list[sge_index].addr);
3421 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3422 ib_wr->sg_list[sge_index].length);
3423 set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3424 ib_wr->sg_list[sge_index].lkey);
3425
3426 total_payload_length += ib_wr->sg_list[sge_index].length;
3427 }
3428 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3429 total_payload_length);
3430
3431 ib_wr = ib_wr->next;
3432 head++;
3433 wqe_count++;
3434 if (head >= qsize)
3435 head = 0;
3436 }
3437
3438 nesqp->hwqp.rq_head = head;
3439 barrier();
3440 while (wqe_count) {
3441 counter = min(wqe_count, ((u32)255));
3442 wqe_count -= counter;
3443 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3444 }
3445
3446 spin_unlock_irqrestore(&nesqp->lock, flags);
3447
3448 out:
3449 if (err)
3450 *bad_wr = ib_wr;
3451 return err;
3452 }
3453
3454
3455 /**
3456 * nes_poll_cq
3457 */
3458 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3459 {
3460 u64 u64temp;
3461 u64 wrid;
3462 unsigned long flags = 0;
3463 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3464 struct nes_device *nesdev = nesvnic->nesdev;
3465 struct nes_cq *nescq = to_nescq(ibcq);
3466 struct nes_qp *nesqp;
3467 struct nes_hw_cqe cqe;
3468 u32 head;
3469 u32 wq_tail = 0;
3470 u32 cq_size;
3471 u32 cqe_count = 0;
3472 u32 wqe_index;
3473 u32 u32temp;
3474 u32 move_cq_head = 1;
3475 u32 err_code;
3476
3477 nes_debug(NES_DBG_CQ, "\n");
3478
3479 spin_lock_irqsave(&nescq->lock, flags);
3480
3481 head = nescq->hw_cq.cq_head;
3482 cq_size = nescq->hw_cq.cq_size;
3483
3484 while (cqe_count < num_entries) {
3485 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3486 NES_CQE_VALID) == 0)
3487 break;
3488
3489 /*
3490 * Make sure we read CQ entry contents *after*
3491 * we've checked the valid bit.
3492 */
3493 rmb();
3494
3495 cqe = nescq->hw_cq.cq_vbase[head];
3496 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3497 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3498 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3499 /* parse CQE, get completion context from WQE (either rq or sq) */
3500 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3501 ((u64)u32temp);
3502
3503 if (u64temp) {
3504 nesqp = (struct nes_qp *)(unsigned long)u64temp;
3505 memset(entry, 0, sizeof *entry);
3506 if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3507 entry->status = IB_WC_SUCCESS;
3508 } else {
3509 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3510 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3511 entry->status = err_code & 0x0000ffff;
3512
3513 /* The rest of the cqe's will be marked as flushed */
3514 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3515 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3516 NES_IWARP_CQE_MINOR_FLUSH);
3517 } else
3518 entry->status = IB_WC_WR_FLUSH_ERR;
3519 }
3520
3521 entry->qp = &nesqp->ibqp;
3522 entry->src_qp = nesqp->hwqp.qp_id;
3523
3524 if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3525 if (nesqp->skip_lsmm) {
3526 nesqp->skip_lsmm = 0;
3527 nesqp->hwqp.sq_tail++;
3528 }
3529
3530 /* Working on a SQ Completion*/
3531 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3532 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3533 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3534 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3535 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3536 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3537
3538 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3539 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3540 case NES_IWARP_SQ_OP_RDMAW:
3541 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3542 entry->opcode = IB_WC_RDMA_WRITE;
3543 break;
3544 case NES_IWARP_SQ_OP_RDMAR:
3545 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3546 entry->opcode = IB_WC_RDMA_READ;
3547 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3548 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3549 break;
3550 case NES_IWARP_SQ_OP_SENDINV:
3551 case NES_IWARP_SQ_OP_SENDSEINV:
3552 case NES_IWARP_SQ_OP_SEND:
3553 case NES_IWARP_SQ_OP_SENDSE:
3554 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3555 entry->opcode = IB_WC_SEND;
3556 break;
3557 case NES_IWARP_SQ_OP_LOCINV:
3558 entry->opcode = IB_WC_LOCAL_INV;
3559 break;
3560 case NES_IWARP_SQ_OP_FAST_REG:
3561 entry->opcode = IB_WC_REG_MR;
3562 break;
3563 }
3564
3565 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3566 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3567 move_cq_head = 0;
3568 wq_tail = nesqp->hwqp.sq_tail;
3569 }
3570 } else {
3571 /* Working on a RQ Completion*/
3572 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3573 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3574 ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3575 entry->opcode = IB_WC_RECV;
3576
3577 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3578 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3579 move_cq_head = 0;
3580 wq_tail = nesqp->hwqp.rq_tail;
3581 }
3582 }
3583
3584 entry->wr_id = wrid;
3585 entry++;
3586 cqe_count++;
3587 }
3588
3589 if (move_cq_head) {
3590 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3591 if (++head >= cq_size)
3592 head = 0;
3593 nescq->polled_completions++;
3594
3595 if ((nescq->polled_completions > (cq_size / 2)) ||
3596 (nescq->polled_completions == 255)) {
3597 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3598 " are pending %u of %u.\n",
3599 nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3600 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3601 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3602 nescq->polled_completions = 0;
3603 }
3604 } else {
3605 /* Update the wqe index and set status to flush */
3606 wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3607 wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3608 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3609 cpu_to_le32(wqe_index);
3610 move_cq_head = 1; /* ready for next pass */
3611 }
3612 }
3613
3614 if (nescq->polled_completions) {
3615 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3616 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3617 nescq->polled_completions = 0;
3618 }
3619
3620 nescq->hw_cq.cq_head = head;
3621 nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3622 cqe_count, nescq->hw_cq.cq_number);
3623
3624 spin_unlock_irqrestore(&nescq->lock, flags);
3625
3626 return cqe_count;
3627 }
3628
3629
3630 /**
3631 * nes_req_notify_cq
3632 */
3633 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3634 {
3635 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3636 struct nes_device *nesdev = nesvnic->nesdev;
3637 struct nes_cq *nescq = to_nescq(ibcq);
3638 u32 cq_arm;
3639
3640 nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3641 nescq->hw_cq.cq_number);
3642
3643 cq_arm = nescq->hw_cq.cq_number;
3644 if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3645 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3646 else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3647 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3648 else
3649 return -EINVAL;
3650
3651 nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3652 nes_read32(nesdev->regs+NES_CQE_ALLOC);
3653
3654 return 0;
3655 }
3656
3657 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3658 struct ib_port_immutable *immutable)
3659 {
3660 struct ib_port_attr attr;
3661 int err;
3662
3663 err = nes_query_port(ibdev, port_num, &attr);
3664 if (err)
3665 return err;
3666
3667 immutable->pkey_tbl_len = attr.pkey_tbl_len;
3668 immutable->gid_tbl_len = attr.gid_tbl_len;
3669 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3670
3671 return 0;
3672 }
3673
3674 /**
3675 * nes_init_ofa_device
3676 */
3677 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3678 {
3679 struct nes_ib_device *nesibdev;
3680 struct nes_vnic *nesvnic = netdev_priv(netdev);
3681 struct nes_device *nesdev = nesvnic->nesdev;
3682
3683 nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3684 if (nesibdev == NULL) {
3685 return NULL;
3686 }
3687 strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3688 nesibdev->ibdev.owner = THIS_MODULE;
3689
3690 nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3691 memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3692 memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3693
3694 nesibdev->ibdev.uverbs_cmd_mask =
3695 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3696 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3697 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3698 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3699 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3700 (1ull << IB_USER_VERBS_CMD_REG_MR) |
3701 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3702 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3703 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3704 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3705 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3706 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3707 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3708 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3709 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3710 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3711 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3712 (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3713 (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3714 (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3715 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3716 (1ull << IB_USER_VERBS_CMD_POST_SEND);
3717
3718 nesibdev->ibdev.phys_port_cnt = 1;
3719 nesibdev->ibdev.num_comp_vectors = 1;
3720 nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3721 nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3722 nesibdev->ibdev.query_device = nes_query_device;
3723 nesibdev->ibdev.query_port = nes_query_port;
3724 nesibdev->ibdev.query_pkey = nes_query_pkey;
3725 nesibdev->ibdev.query_gid = nes_query_gid;
3726 nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3727 nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3728 nesibdev->ibdev.mmap = nes_mmap;
3729 nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3730 nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3731 nesibdev->ibdev.create_ah = nes_create_ah;
3732 nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3733 nesibdev->ibdev.create_qp = nes_create_qp;
3734 nesibdev->ibdev.modify_qp = nes_modify_qp;
3735 nesibdev->ibdev.query_qp = nes_query_qp;
3736 nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3737 nesibdev->ibdev.create_cq = nes_create_cq;
3738 nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3739 nesibdev->ibdev.poll_cq = nes_poll_cq;
3740 nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3741 nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3742 nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3743 nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3744 nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3745
3746 nesibdev->ibdev.alloc_mr = nes_alloc_mr;
3747 nesibdev->ibdev.map_mr_sg = nes_map_mr_sg;
3748
3749 nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3750 nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3751 nesibdev->ibdev.process_mad = nes_process_mad;
3752
3753 nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3754 nesibdev->ibdev.post_send = nes_post_send;
3755 nesibdev->ibdev.post_recv = nes_post_recv;
3756
3757 nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3758 if (nesibdev->ibdev.iwcm == NULL) {
3759 ib_dealloc_device(&nesibdev->ibdev);
3760 return NULL;
3761 }
3762 nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3763 nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3764 nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3765 nesibdev->ibdev.iwcm->connect = nes_connect;
3766 nesibdev->ibdev.iwcm->accept = nes_accept;
3767 nesibdev->ibdev.iwcm->reject = nes_reject;
3768 nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3769 nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3770 nesibdev->ibdev.get_port_immutable = nes_port_immutable;
3771 memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3772 sizeof(nesibdev->ibdev.iwcm->ifname));
3773
3774 return nesibdev;
3775 }
3776
3777
3778 /**
3779 * nes_handle_delayed_event
3780 */
3781 static void nes_handle_delayed_event(unsigned long data)
3782 {
3783 struct nes_vnic *nesvnic = (void *) data;
3784
3785 if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3786 struct ib_event event;
3787
3788 event.device = &nesvnic->nesibdev->ibdev;
3789 if (!event.device)
3790 goto stop_timer;
3791 event.event = nesvnic->delayed_event;
3792 event.element.port_num = nesvnic->logical_port + 1;
3793 ib_dispatch_event(&event);
3794 }
3795
3796 stop_timer:
3797 nesvnic->event_timer.function = NULL;
3798 }
3799
3800
3801 void nes_port_ibevent(struct nes_vnic *nesvnic)
3802 {
3803 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3804 struct nes_device *nesdev = nesvnic->nesdev;
3805 struct ib_event event;
3806 event.device = &nesibdev->ibdev;
3807 event.element.port_num = nesvnic->logical_port + 1;
3808 event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3809
3810 if (!nesvnic->event_timer.function) {
3811 ib_dispatch_event(&event);
3812 nesvnic->last_dispatched_event = event.event;
3813 nesvnic->event_timer.function = nes_handle_delayed_event;
3814 nesvnic->event_timer.data = (unsigned long) nesvnic;
3815 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3816 add_timer(&nesvnic->event_timer);
3817 } else {
3818 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3819 }
3820 nesvnic->delayed_event = event.event;
3821 }
3822
3823
3824 /**
3825 * nes_destroy_ofa_device
3826 */
3827 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3828 {
3829 if (nesibdev == NULL)
3830 return;
3831
3832 nes_unregister_ofa_device(nesibdev);
3833
3834 kfree(nesibdev->ibdev.iwcm);
3835 ib_dealloc_device(&nesibdev->ibdev);
3836 }
3837
3838
3839 /**
3840 * nes_register_ofa_device
3841 */
3842 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3843 {
3844 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3845 struct nes_device *nesdev = nesvnic->nesdev;
3846 struct nes_adapter *nesadapter = nesdev->nesadapter;
3847 int i, ret;
3848
3849 ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
3850 if (ret) {
3851 return ret;
3852 }
3853
3854 /* Get the resources allocated to this device */
3855 nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3856 nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3857 nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3858 nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3859
3860 for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3861 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3862 if (ret) {
3863 while (i > 0) {
3864 i--;
3865 device_remove_file(&nesibdev->ibdev.dev,
3866 nes_dev_attributes[i]);
3867 }
3868 ib_unregister_device(&nesibdev->ibdev);
3869 return ret;
3870 }
3871 }
3872
3873 nesvnic->of_device_registered = 1;
3874
3875 return 0;
3876 }
3877
3878
3879 /**
3880 * nes_unregister_ofa_device
3881 */
3882 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3883 {
3884 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3885 int i;
3886
3887 for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3888 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3889 }
3890
3891 if (nesvnic->of_device_registered) {
3892 ib_unregister_device(&nesibdev->ibdev);
3893 }
3894
3895 nesvnic->of_device_registered = 0;
3896 }
Linux kernel - Deliverables
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