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hwrng: core - Don't use a stack buffer in add_early_randomness()
[linux/fpc-iii.git] / drivers / infiniband / hw / nes / nes_verbs.c
blobbd69125731c1816245fc90c2bfe7d4cbffb8c02a
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 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 init_completion(&nesqp->sq_drained);
1318 init_completion(&nesqp->rq_drained);
1319
1320 nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1321 init_timer(&nesqp->terminate_timer);
1322 nesqp->terminate_timer.function = nes_terminate_timeout;
1323 nesqp->terminate_timer.data = (unsigned long)nesqp;
1324
1325 /* update the QP table */
1326 nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1327 nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1328 netdev_refcnt_read(nesvnic->netdev));
1329
1330 return &nesqp->ibqp;
1331 }
1332
1333 /**
1334 * nes_clean_cq
1335 */
1336 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1337 {
1338 u32 cq_head;
1339 u32 lo;
1340 u32 hi;
1341 u64 u64temp;
1342 unsigned long flags = 0;
1343
1344 spin_lock_irqsave(&nescq->lock, flags);
1345
1346 cq_head = nescq->hw_cq.cq_head;
1347 while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1348 rmb();
1349 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1350 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1351 u64temp = (((u64)hi) << 32) | ((u64)lo);
1352 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1353 if (u64temp == (u64)(unsigned long)nesqp) {
1354 /* Zero the context value so cqe will be ignored */
1355 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1356 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1357 }
1358
1359 if (++cq_head >= nescq->hw_cq.cq_size)
1360 cq_head = 0;
1361 }
1362
1363 spin_unlock_irqrestore(&nescq->lock, flags);
1364 }
1365
1366
1367 /**
1368 * nes_destroy_qp
1369 */
1370 static int nes_destroy_qp(struct ib_qp *ibqp)
1371 {
1372 struct nes_qp *nesqp = to_nesqp(ibqp);
1373 struct nes_ucontext *nes_ucontext;
1374 struct ib_qp_attr attr;
1375 struct iw_cm_id *cm_id;
1376 struct iw_cm_event cm_event;
1377 int ret = 0;
1378
1379 atomic_inc(&sw_qps_destroyed);
1380 nesqp->destroyed = 1;
1381
1382 /* Blow away the connection if it exists. */
1383 if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1384 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1385 attr.qp_state = IB_QPS_ERR;
1386 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1387 }
1388
1389 if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1390 (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1391 cm_id = nesqp->cm_id;
1392 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1393 cm_event.status = -ETIMEDOUT;
1394 cm_event.local_addr = cm_id->local_addr;
1395 cm_event.remote_addr = cm_id->remote_addr;
1396 cm_event.private_data = NULL;
1397 cm_event.private_data_len = 0;
1398
1399 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1400 "QP%u. cm_id = %p, refcount = %u. \n",
1401 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1402
1403 cm_id->rem_ref(cm_id);
1404 ret = cm_id->event_handler(cm_id, &cm_event);
1405 if (ret)
1406 nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1407 }
1408
1409 if (nesqp->user_mode) {
1410 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1411 nes_ucontext = to_nesucontext(ibqp->uobject->context);
1412 clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1413 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1414 if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1415 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1416 }
1417 }
1418 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1419 nesqp->sq_kmapped = 0;
1420 kunmap(nesqp->page);
1421 }
1422 } else {
1423 /* Clean any pending completions from the cq(s) */
1424 if (nesqp->nesscq)
1425 nes_clean_cq(nesqp, nesqp->nesscq);
1426
1427 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1428 nes_clean_cq(nesqp, nesqp->nesrcq);
1429 }
1430 nes_rem_ref(&nesqp->ibqp);
1431 return 0;
1432 }
1433
1434
1435 /**
1436 * nes_create_cq
1437 */
1438 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1439 const struct ib_cq_init_attr *attr,
1440 struct ib_ucontext *context,
1441 struct ib_udata *udata)
1442 {
1443 int entries = attr->cqe;
1444 u64 u64temp;
1445 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1446 struct nes_device *nesdev = nesvnic->nesdev;
1447 struct nes_adapter *nesadapter = nesdev->nesadapter;
1448 struct nes_cq *nescq;
1449 struct nes_ucontext *nes_ucontext = NULL;
1450 struct nes_cqp_request *cqp_request;
1451 void *mem = NULL;
1452 struct nes_hw_cqp_wqe *cqp_wqe;
1453 struct nes_pbl *nespbl = NULL;
1454 struct nes_create_cq_req req;
1455 struct nes_create_cq_resp resp;
1456 u32 cq_num = 0;
1457 u32 opcode = 0;
1458 u32 pbl_entries = 1;
1459 int err;
1460 unsigned long flags;
1461 int ret;
1462
1463 if (attr->flags)
1464 return ERR_PTR(-EINVAL);
1465
1466 if (entries > nesadapter->max_cqe)
1467 return ERR_PTR(-EINVAL);
1468
1469 err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1470 nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1471 if (err) {
1472 return ERR_PTR(err);
1473 }
1474
1475 nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1476 if (!nescq) {
1477 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1478 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1479 return ERR_PTR(-ENOMEM);
1480 }
1481
1482 nescq->hw_cq.cq_size = max(entries + 1, 5);
1483 nescq->hw_cq.cq_number = cq_num;
1484 nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1485
1486
1487 if (context) {
1488 nes_ucontext = to_nesucontext(context);
1489 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1490 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1491 kfree(nescq);
1492 return ERR_PTR(-EFAULT);
1493 }
1494 nesvnic->mcrq_ucontext = nes_ucontext;
1495 nes_ucontext->mcrqf = req.mcrqf;
1496 if (nes_ucontext->mcrqf) {
1497 if (nes_ucontext->mcrqf & 0x80000000)
1498 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1499 else if (nes_ucontext->mcrqf & 0x40000000)
1500 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1501 else
1502 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1503 nescq->mcrqf = nes_ucontext->mcrqf;
1504 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1505 }
1506 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1507 (unsigned long)req.user_cq_buffer, entries);
1508 err = 1;
1509 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1510 if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1511 list_del(&nespbl->list);
1512 err = 0;
1513 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1514 nespbl);
1515 break;
1516 }
1517 }
1518 if (err) {
1519 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1520 kfree(nescq);
1521 return ERR_PTR(-EFAULT);
1522 }
1523
1524 pbl_entries = nespbl->pbl_size >> 3;
1525 nescq->cq_mem_size = 0;
1526 } else {
1527 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1528 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1529 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1530
1531 /* allocate the physical buffer space */
1532 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1533 &nescq->hw_cq.cq_pbase);
1534 if (!mem) {
1535 printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1536 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1537 kfree(nescq);
1538 return ERR_PTR(-ENOMEM);
1539 }
1540
1541 nescq->hw_cq.cq_vbase = mem;
1542 nescq->hw_cq.cq_head = 0;
1543 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1544 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1545 (u32)nescq->hw_cq.cq_pbase);
1546 }
1547
1548 nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1549 spin_lock_init(&nescq->lock);
1550
1551 /* send CreateCQ request to CQP */
1552 cqp_request = nes_get_cqp_request(nesdev);
1553 if (cqp_request == NULL) {
1554 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1555 if (!context)
1556 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1557 nescq->hw_cq.cq_pbase);
1558 else {
1559 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1560 nespbl->pbl_vbase, nespbl->pbl_pbase);
1561 kfree(nespbl);
1562 }
1563
1564 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1565 kfree(nescq);
1566 return ERR_PTR(-ENOMEM);
1567 }
1568 cqp_request->waiting = 1;
1569 cqp_wqe = &cqp_request->cqp_wqe;
1570
1571 opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1572 NES_CQP_CQ_CHK_OVERFLOW |
1573 NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1574
1575 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1576
1577 if (pbl_entries != 1) {
1578 if (pbl_entries > 32) {
1579 /* use 4k pbl */
1580 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1581 if (nesadapter->free_4kpbl == 0) {
1582 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1583 nes_free_cqp_request(nesdev, cqp_request);
1584 if (!context)
1585 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1586 nescq->hw_cq.cq_pbase);
1587 else {
1588 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1589 nespbl->pbl_vbase, nespbl->pbl_pbase);
1590 kfree(nespbl);
1591 }
1592 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1593 kfree(nescq);
1594 return ERR_PTR(-ENOMEM);
1595 } else {
1596 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1597 nescq->virtual_cq = 2;
1598 nesadapter->free_4kpbl--;
1599 }
1600 } else {
1601 /* use 256 byte pbl */
1602 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1603 if (nesadapter->free_256pbl == 0) {
1604 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1605 nes_free_cqp_request(nesdev, cqp_request);
1606 if (!context)
1607 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1608 nescq->hw_cq.cq_pbase);
1609 else {
1610 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1611 nespbl->pbl_vbase, nespbl->pbl_pbase);
1612 kfree(nespbl);
1613 }
1614 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1615 kfree(nescq);
1616 return ERR_PTR(-ENOMEM);
1617 } else {
1618 opcode |= NES_CQP_CQ_VIRT;
1619 nescq->virtual_cq = 1;
1620 nesadapter->free_256pbl--;
1621 }
1622 }
1623 }
1624
1625 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1626
1627 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1628 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1629 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1630 (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1631
1632 if (context) {
1633 if (pbl_entries != 1)
1634 u64temp = (u64)nespbl->pbl_pbase;
1635 else
1636 u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1637 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1638 nes_ucontext->mmap_db_index[0]);
1639 } else {
1640 u64temp = (u64)nescq->hw_cq.cq_pbase;
1641 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1642 }
1643 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1644 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1645 u64temp = (u64)(unsigned long)&nescq->hw_cq;
1646 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1647 cpu_to_le32((u32)(u64temp >> 1));
1648 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1649 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1650
1651 atomic_set(&cqp_request->refcount, 2);
1652 nes_post_cqp_request(nesdev, cqp_request);
1653
1654 /* Wait for CQP */
1655 nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1656 nescq->hw_cq.cq_number);
1657 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1658 NES_EVENT_TIMEOUT * 2);
1659 nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1660 nescq->hw_cq.cq_number, ret);
1661 if ((!ret) || (cqp_request->major_code)) {
1662 nes_put_cqp_request(nesdev, cqp_request);
1663 if (!context)
1664 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1665 nescq->hw_cq.cq_pbase);
1666 else {
1667 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1668 nespbl->pbl_vbase, nespbl->pbl_pbase);
1669 kfree(nespbl);
1670 }
1671 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1672 kfree(nescq);
1673 return ERR_PTR(-EIO);
1674 }
1675 nes_put_cqp_request(nesdev, cqp_request);
1676
1677 if (context) {
1678 /* free the nespbl */
1679 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1680 nespbl->pbl_pbase);
1681 kfree(nespbl);
1682 resp.cq_id = nescq->hw_cq.cq_number;
1683 resp.cq_size = nescq->hw_cq.cq_size;
1684 resp.mmap_db_index = 0;
1685 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1686 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1687 kfree(nescq);
1688 return ERR_PTR(-EFAULT);
1689 }
1690 }
1691
1692 return &nescq->ibcq;
1693 }
1694
1695
1696 /**
1697 * nes_destroy_cq
1698 */
1699 static int nes_destroy_cq(struct ib_cq *ib_cq)
1700 {
1701 struct nes_cq *nescq;
1702 struct nes_device *nesdev;
1703 struct nes_vnic *nesvnic;
1704 struct nes_adapter *nesadapter;
1705 struct nes_hw_cqp_wqe *cqp_wqe;
1706 struct nes_cqp_request *cqp_request;
1707 unsigned long flags;
1708 u32 opcode = 0;
1709 int ret;
1710
1711 if (ib_cq == NULL)
1712 return 0;
1713
1714 nescq = to_nescq(ib_cq);
1715 nesvnic = to_nesvnic(ib_cq->device);
1716 nesdev = nesvnic->nesdev;
1717 nesadapter = nesdev->nesadapter;
1718
1719 nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1720
1721 /* Send DestroyCQ request to CQP */
1722 cqp_request = nes_get_cqp_request(nesdev);
1723 if (cqp_request == NULL) {
1724 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1725 return -ENOMEM;
1726 }
1727 cqp_request->waiting = 1;
1728 cqp_wqe = &cqp_request->cqp_wqe;
1729 opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1730 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1731 if (nescq->virtual_cq == 1) {
1732 nesadapter->free_256pbl++;
1733 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1734 printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1735 __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1736 }
1737 } else if (nescq->virtual_cq == 2) {
1738 nesadapter->free_4kpbl++;
1739 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1740 printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1741 __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1742 }
1743 opcode |= NES_CQP_CQ_4KB_CHUNK;
1744 }
1745
1746 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1747
1748 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1749 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1750 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1751 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1752 if (!nescq->mcrqf)
1753 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1754
1755 atomic_set(&cqp_request->refcount, 2);
1756 nes_post_cqp_request(nesdev, cqp_request);
1757
1758 /* Wait for CQP */
1759 nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1760 nescq->hw_cq.cq_number);
1761 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1762 NES_EVENT_TIMEOUT);
1763 nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1764 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1765 nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1766 cqp_request->minor_code);
1767 if (!ret) {
1768 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1769 nescq->hw_cq.cq_number);
1770 ret = -ETIME;
1771 } else if (cqp_request->major_code) {
1772 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1773 nescq->hw_cq.cq_number);
1774 ret = -EIO;
1775 } else {
1776 ret = 0;
1777 }
1778 nes_put_cqp_request(nesdev, cqp_request);
1779
1780 if (nescq->cq_mem_size)
1781 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1782 nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1783 kfree(nescq);
1784
1785 return ret;
1786 }
1787
1788 /**
1789 * root_256
1790 */
1791 static u32 root_256(struct nes_device *nesdev,
1792 struct nes_root_vpbl *root_vpbl,
1793 struct nes_root_vpbl *new_root,
1794 u16 pbl_count_4k)
1795 {
1796 u64 leaf_pbl;
1797 int i, j, k;
1798
1799 if (pbl_count_4k == 1) {
1800 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1801 512, &new_root->pbl_pbase);
1802
1803 if (new_root->pbl_vbase == NULL)
1804 return 0;
1805
1806 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1807 for (i = 0; i < 16; i++) {
1808 new_root->pbl_vbase[i].pa_low =
1809 cpu_to_le32((u32)leaf_pbl);
1810 new_root->pbl_vbase[i].pa_high =
1811 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1812 leaf_pbl += 256;
1813 }
1814 } else {
1815 for (i = 3; i >= 0; i--) {
1816 j = i * 16;
1817 root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1818 leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1819 (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1820 << 32);
1821 for (k = 1; k < 16; k++) {
1822 leaf_pbl += 256;
1823 root_vpbl->pbl_vbase[j + k].pa_low =
1824 cpu_to_le32((u32)leaf_pbl);
1825 root_vpbl->pbl_vbase[j + k].pa_high =
1826 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1827 }
1828 }
1829 }
1830
1831 return 1;
1832 }
1833
1834
1835 /**
1836 * nes_reg_mr
1837 */
1838 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1839 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1840 dma_addr_t single_buffer, u16 pbl_count_4k,
1841 u16 residual_page_count_4k, int acc, u64 *iova_start,
1842 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1843 {
1844 struct nes_hw_cqp_wqe *cqp_wqe;
1845 struct nes_cqp_request *cqp_request;
1846 unsigned long flags;
1847 int ret;
1848 struct nes_adapter *nesadapter = nesdev->nesadapter;
1849 uint pg_cnt = 0;
1850 u16 pbl_count_256 = 0;
1851 u16 pbl_count = 0;
1852 u8 use_256_pbls = 0;
1853 u8 use_4k_pbls = 0;
1854 u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1855 struct nes_root_vpbl new_root = { 0, NULL, NULL };
1856 u32 opcode = 0;
1857 u16 major_code;
1858
1859 /* Register the region with the adapter */
1860 cqp_request = nes_get_cqp_request(nesdev);
1861 if (cqp_request == NULL) {
1862 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1863 return -ENOMEM;
1864 }
1865 cqp_request->waiting = 1;
1866 cqp_wqe = &cqp_request->cqp_wqe;
1867
1868 if (pbl_count_4k) {
1869 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1870
1871 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1872 pbl_count_256 = (pg_cnt + 31) / 32;
1873 if (pg_cnt <= 32) {
1874 if (pbl_count_256 <= nesadapter->free_256pbl)
1875 use_256_pbls = 1;
1876 else if (pbl_count_4k <= nesadapter->free_4kpbl)
1877 use_4k_pbls = 1;
1878 } else if (pg_cnt <= 2048) {
1879 if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1880 (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1881 use_4k_pbls = 1;
1882 } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1883 use_256_pbls = 1;
1884 use_two_level = 1;
1885 } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1886 use_4k_pbls = 1;
1887 }
1888 } else {
1889 if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1890 use_4k_pbls = 1;
1891 }
1892
1893 if (use_256_pbls) {
1894 pbl_count = pbl_count_256;
1895 nesadapter->free_256pbl -= pbl_count + use_two_level;
1896 } else if (use_4k_pbls) {
1897 pbl_count = pbl_count_4k;
1898 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1899 } else {
1900 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1901 nes_debug(NES_DBG_MR, "Out of Pbls\n");
1902 nes_free_cqp_request(nesdev, cqp_request);
1903 return -ENOMEM;
1904 }
1905
1906 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1907 }
1908
1909 if (use_256_pbls && use_two_level) {
1910 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1911 if (new_root.pbl_pbase != 0)
1912 root_vpbl = &new_root;
1913 } else {
1914 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1915 nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1916 use_256_pbls = 0;
1917
1918 if (pbl_count_4k == 1)
1919 use_two_level = 0;
1920 pbl_count = pbl_count_4k;
1921
1922 if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1923 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1924 use_4k_pbls = 1;
1925 }
1926 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1927
1928 if (use_4k_pbls == 0)
1929 return -ENOMEM;
1930 }
1931 }
1932
1933 opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1934 NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1935 if (acc & IB_ACCESS_LOCAL_WRITE)
1936 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1937 if (acc & IB_ACCESS_REMOTE_WRITE)
1938 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1939 if (acc & IB_ACCESS_REMOTE_READ)
1940 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1941 if (acc & IB_ACCESS_MW_BIND)
1942 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1943
1944 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1945 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1946 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1947 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1948
1949 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1950 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1951 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1952 cpu_to_le32(nespd->pd_id & 0x00007fff);
1953 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1954
1955 if (pbl_count == 0) {
1956 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1957 } else {
1958 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1959 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1960 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1961
1962 if (use_4k_pbls)
1963 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1964 }
1965 barrier();
1966
1967 atomic_set(&cqp_request->refcount, 2);
1968 nes_post_cqp_request(nesdev, cqp_request);
1969
1970 /* Wait for CQP */
1971 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1972 NES_EVENT_TIMEOUT);
1973 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1974 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1975 stag, ret, cqp_request->major_code, cqp_request->minor_code);
1976 major_code = cqp_request->major_code;
1977 nes_put_cqp_request(nesdev, cqp_request);
1978
1979 if ((!ret || major_code) && pbl_count != 0) {
1980 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1981 if (use_256_pbls)
1982 nesadapter->free_256pbl += pbl_count + use_two_level;
1983 else if (use_4k_pbls)
1984 nesadapter->free_4kpbl += pbl_count + use_two_level;
1985 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1986 }
1987 if (new_root.pbl_pbase)
1988 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1989 new_root.pbl_pbase);
1990
1991 if (!ret)
1992 return -ETIME;
1993 else if (major_code)
1994 return -EIO;
1995
1996 *actual_pbl_cnt = pbl_count + use_two_level;
1997 *used_4k_pbls = use_4k_pbls;
1998 return 0;
1999 }
2000
2001
2002 /**
2003 * nes_reg_phys_mr
2004 */
2005 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
2006 int acc, u64 *iova_start)
2007 {
2008 u64 region_length;
2009 struct nes_pd *nespd = to_nespd(ib_pd);
2010 struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2011 struct nes_device *nesdev = nesvnic->nesdev;
2012 struct nes_adapter *nesadapter = nesdev->nesadapter;
2013 struct nes_mr *nesmr;
2014 struct ib_mr *ibmr;
2015 struct nes_vpbl vpbl;
2016 struct nes_root_vpbl root_vpbl;
2017 u32 stag;
2018 unsigned long mask;
2019 u32 stag_index = 0;
2020 u32 next_stag_index = 0;
2021 u32 driver_key = 0;
2022 int err = 0;
2023 int ret = 0;
2024 u16 pbl_count = 0;
2025 u8 single_page = 1;
2026 u8 stag_key = 0;
2027
2028 region_length = 0;
2029 vpbl.pbl_vbase = NULL;
2030 root_vpbl.pbl_vbase = NULL;
2031 root_vpbl.pbl_pbase = 0;
2032
2033 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2034 stag_key = (u8)next_stag_index;
2035
2036 driver_key = 0;
2037
2038 next_stag_index >>= 8;
2039 next_stag_index %= nesadapter->max_mr;
2040
2041 if ((addr ^ *iova_start) & ~PAGE_MASK)
2042 return ERR_PTR(-EINVAL);
2043
2044 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2045 &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2046 if (err) {
2047 return ERR_PTR(err);
2048 }
2049
2050 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2051 if (!nesmr) {
2052 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2053 return ERR_PTR(-ENOMEM);
2054 }
2055
2056 /* Allocate a 4K buffer for the PBL */
2057 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2058 &vpbl.pbl_pbase);
2059 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2060 vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2061 if (!vpbl.pbl_vbase) {
2062 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2063 ibmr = ERR_PTR(-ENOMEM);
2064 kfree(nesmr);
2065 goto reg_phys_err;
2066 }
2067
2068
2069 mask = !size;
2070
2071 if (mask & ~PAGE_MASK) {
2072 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2073 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2074 ibmr = ERR_PTR(-EINVAL);
2075 kfree(nesmr);
2076 goto reg_phys_err;
2077 }
2078
2079 region_length += size;
2080 vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2081 vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2082
2083 stag = stag_index << 8;
2084 stag |= driver_key;
2085 stag += (u32)stag_key;
2086
2087 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2088 " length = 0x%016lX, index = 0x%08X\n",
2089 stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2090
2091 /* Make the leaf PBL the root if only one PBL */
2092 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2093
2094 if (single_page) {
2095 pbl_count = 0;
2096 } else {
2097 pbl_count = 1;
2098 }
2099 ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2100 addr, pbl_count, 1, acc, iova_start,
2101 &nesmr->pbls_used, &nesmr->pbl_4k);
2102
2103 if (ret == 0) {
2104 nesmr->ibmr.rkey = stag;
2105 nesmr->ibmr.lkey = stag;
2106 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2107 ibmr = &nesmr->ibmr;
2108 } else {
2109 kfree(nesmr);
2110 ibmr = ERR_PTR(-ENOMEM);
2111 }
2112
2113 reg_phys_err:
2114 /* single PBL case */
2115 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2116 return ibmr;
2117 }
2118
2119
2120 /**
2121 * nes_get_dma_mr
2122 */
2123 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2124 {
2125 u64 kva = 0;
2126
2127 nes_debug(NES_DBG_MR, "\n");
2128
2129 return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2130 }
2131
2132 /**
2133 * nes_reg_user_mr
2134 */
2135 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2136 u64 virt, int acc, struct ib_udata *udata)
2137 {
2138 u64 iova_start;
2139 __le64 *pbl;
2140 u64 region_length;
2141 dma_addr_t last_dma_addr = 0;
2142 dma_addr_t first_dma_addr = 0;
2143 struct nes_pd *nespd = to_nespd(pd);
2144 struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2145 struct nes_device *nesdev = nesvnic->nesdev;
2146 struct nes_adapter *nesadapter = nesdev->nesadapter;
2147 struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2148 struct scatterlist *sg;
2149 struct nes_ucontext *nes_ucontext;
2150 struct nes_pbl *nespbl;
2151 struct nes_mr *nesmr;
2152 struct ib_umem *region;
2153 struct nes_mem_reg_req req;
2154 struct nes_vpbl vpbl;
2155 struct nes_root_vpbl root_vpbl;
2156 int entry, page_index;
2157 int page_count = 0;
2158 int err, pbl_depth = 0;
2159 int chunk_pages;
2160 int ret;
2161 u32 stag;
2162 u32 stag_index = 0;
2163 u32 next_stag_index;
2164 u32 driver_key;
2165 u32 root_pbl_index = 0;
2166 u32 cur_pbl_index = 0;
2167 u32 skip_pages;
2168 u16 pbl_count;
2169 u8 single_page = 1;
2170 u8 stag_key;
2171 int first_page = 1;
2172
2173 region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2174 if (IS_ERR(region)) {
2175 return (struct ib_mr *)region;
2176 }
2177
2178 nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2179 " offset = %u, page size = %u.\n",
2180 (unsigned long int)start, (unsigned long int)virt, (u32)length,
2181 ib_umem_offset(region), region->page_size);
2182
2183 skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2184
2185 if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2186 ib_umem_release(region);
2187 return ERR_PTR(-EFAULT);
2188 }
2189 nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2190
2191 switch (req.reg_type) {
2192 case IWNES_MEMREG_TYPE_MEM:
2193 pbl_depth = 0;
2194 region_length = 0;
2195 vpbl.pbl_vbase = NULL;
2196 root_vpbl.pbl_vbase = NULL;
2197 root_vpbl.pbl_pbase = 0;
2198
2199 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2200 stag_key = (u8)next_stag_index;
2201
2202 driver_key = next_stag_index & 0x70000000;
2203
2204 next_stag_index >>= 8;
2205 next_stag_index %= nesadapter->max_mr;
2206
2207 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2208 nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2209 if (err) {
2210 ib_umem_release(region);
2211 return ERR_PTR(err);
2212 }
2213
2214 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2215 if (!nesmr) {
2216 ib_umem_release(region);
2217 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2218 return ERR_PTR(-ENOMEM);
2219 }
2220 nesmr->region = region;
2221
2222 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2223 if (sg_dma_address(sg) & ~PAGE_MASK) {
2224 ib_umem_release(region);
2225 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2226 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2227 (unsigned int) sg_dma_address(sg));
2228 ibmr = ERR_PTR(-EINVAL);
2229 kfree(nesmr);
2230 goto reg_user_mr_err;
2231 }
2232
2233 if (!sg_dma_len(sg)) {
2234 ib_umem_release(region);
2235 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2236 stag_index);
2237 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2238 ibmr = ERR_PTR(-EINVAL);
2239 kfree(nesmr);
2240 goto reg_user_mr_err;
2241 }
2242
2243 region_length += sg_dma_len(sg);
2244 chunk_pages = sg_dma_len(sg) >> 12;
2245 region_length -= skip_pages << 12;
2246 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2247 skip_pages = 0;
2248 if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2249 goto enough_pages;
2250 if ((page_count&0x01FF) == 0) {
2251 if (page_count >= 1024 * 512) {
2252 ib_umem_release(region);
2253 nes_free_resource(nesadapter,
2254 nesadapter->allocated_mrs, stag_index);
2255 kfree(nesmr);
2256 ibmr = ERR_PTR(-E2BIG);
2257 goto reg_user_mr_err;
2258 }
2259 if (root_pbl_index == 1) {
2260 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2261 8192, &root_vpbl.pbl_pbase);
2262 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2263 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2264 if (!root_vpbl.pbl_vbase) {
2265 ib_umem_release(region);
2266 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2267 vpbl.pbl_pbase);
2268 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2269 stag_index);
2270 kfree(nesmr);
2271 ibmr = ERR_PTR(-ENOMEM);
2272 goto reg_user_mr_err;
2273 }
2274 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2275 GFP_KERNEL);
2276 if (!root_vpbl.leaf_vpbl) {
2277 ib_umem_release(region);
2278 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2279 root_vpbl.pbl_pbase);
2280 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2281 vpbl.pbl_pbase);
2282 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2283 stag_index);
2284 kfree(nesmr);
2285 ibmr = ERR_PTR(-ENOMEM);
2286 goto reg_user_mr_err;
2287 }
2288 root_vpbl.pbl_vbase[0].pa_low =
2289 cpu_to_le32((u32)vpbl.pbl_pbase);
2290 root_vpbl.pbl_vbase[0].pa_high =
2291 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2292 root_vpbl.leaf_vpbl[0] = vpbl;
2293 }
2294 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2295 &vpbl.pbl_pbase);
2296 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2297 vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2298 if (!vpbl.pbl_vbase) {
2299 ib_umem_release(region);
2300 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2301 ibmr = ERR_PTR(-ENOMEM);
2302 kfree(nesmr);
2303 goto reg_user_mr_err;
2304 }
2305 if (1 <= root_pbl_index) {
2306 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2307 cpu_to_le32((u32)vpbl.pbl_pbase);
2308 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2309 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2310 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2311 }
2312 root_pbl_index++;
2313 cur_pbl_index = 0;
2314 }
2315 if (single_page) {
2316 if (page_count != 0) {
2317 if ((last_dma_addr+4096) !=
2318 (sg_dma_address(sg)+
2319 (page_index*4096)))
2320 single_page = 0;
2321 last_dma_addr = sg_dma_address(sg)+
2322 (page_index*4096);
2323 } else {
2324 first_dma_addr = sg_dma_address(sg)+
2325 (page_index*4096);
2326 last_dma_addr = first_dma_addr;
2327 }
2328 }
2329
2330 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2331 cpu_to_le32((u32)(sg_dma_address(sg)+
2332 (page_index*4096)));
2333 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2334 cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2335 (page_index*4096))) >> 32)));
2336 cur_pbl_index++;
2337 page_count++;
2338 }
2339 }
2340
2341 enough_pages:
2342 nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2343 " stag_key=0x%08x\n",
2344 stag_index, driver_key, stag_key);
2345 stag = stag_index << 8;
2346 stag |= driver_key;
2347 stag += (u32)stag_key;
2348
2349 iova_start = virt;
2350 /* Make the leaf PBL the root if only one PBL */
2351 if (root_pbl_index == 1) {
2352 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2353 }
2354
2355 if (single_page) {
2356 pbl_count = 0;
2357 } else {
2358 pbl_count = root_pbl_index;
2359 first_dma_addr = 0;
2360 }
2361 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2362 " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2363 stag, (unsigned int)iova_start,
2364 (unsigned int)region_length, stag_index,
2365 (unsigned long long)region->length, pbl_count);
2366 ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2367 first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2368 &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2369
2370 nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2371
2372 if (ret == 0) {
2373 nesmr->ibmr.rkey = stag;
2374 nesmr->ibmr.lkey = stag;
2375 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2376 ibmr = &nesmr->ibmr;
2377 } else {
2378 ib_umem_release(region);
2379 kfree(nesmr);
2380 ibmr = ERR_PTR(-ENOMEM);
2381 }
2382
2383 reg_user_mr_err:
2384 /* free the resources */
2385 if (root_pbl_index == 1) {
2386 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2387 vpbl.pbl_pbase);
2388 } else {
2389 for (page_index=0; page_index<root_pbl_index; page_index++) {
2390 pci_free_consistent(nesdev->pcidev, 4096,
2391 root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2392 root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2393 }
2394 kfree(root_vpbl.leaf_vpbl);
2395 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2396 root_vpbl.pbl_pbase);
2397 }
2398
2399 nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2400
2401 return ibmr;
2402 case IWNES_MEMREG_TYPE_QP:
2403 case IWNES_MEMREG_TYPE_CQ:
2404 if (!region->length) {
2405 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2406 ib_umem_release(region);
2407 return ERR_PTR(-EINVAL);
2408 }
2409 nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2410 if (!nespbl) {
2411 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2412 ib_umem_release(region);
2413 return ERR_PTR(-ENOMEM);
2414 }
2415 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2416 if (!nesmr) {
2417 ib_umem_release(region);
2418 kfree(nespbl);
2419 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2420 return ERR_PTR(-ENOMEM);
2421 }
2422 nesmr->region = region;
2423 nes_ucontext = to_nesucontext(pd->uobject->context);
2424 pbl_depth = region->length >> 12;
2425 pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2426 nespbl->pbl_size = pbl_depth*sizeof(u64);
2427 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2428 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2429 } else {
2430 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2431 }
2432
2433 nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2434 nespbl->pbl_size, pbl_depth);
2435 pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2436 &nespbl->pbl_pbase);
2437 if (!pbl) {
2438 ib_umem_release(region);
2439 kfree(nesmr);
2440 kfree(nespbl);
2441 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2442 return ERR_PTR(-ENOMEM);
2443 }
2444
2445 nespbl->pbl_vbase = (u64 *)pbl;
2446 nespbl->user_base = start;
2447 nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2448 " pbl_vbase=%p user_base=0x%lx\n",
2449 nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2450 (void *) nespbl->pbl_vbase, nespbl->user_base);
2451
2452 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2453 chunk_pages = sg_dma_len(sg) >> 12;
2454 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2455 if (first_page) {
2456 nespbl->page = sg_page(sg);
2457 first_page = 0;
2458 }
2459
2460 for (page_index = 0; page_index < chunk_pages; page_index++) {
2461 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2462 (sg_dma_address(sg)+
2463 (page_index*4096)));
2464 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2465 (sg_dma_address(sg)+
2466 (page_index*4096)))>>32);
2467 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2468 (unsigned long long)*pbl,
2469 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2470 pbl++;
2471 }
2472 }
2473
2474 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2475 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2476 } else {
2477 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2478 }
2479 nesmr->ibmr.rkey = -1;
2480 nesmr->ibmr.lkey = -1;
2481 nesmr->mode = req.reg_type;
2482 return &nesmr->ibmr;
2483 }
2484
2485 ib_umem_release(region);
2486 return ERR_PTR(-ENOSYS);
2487 }
2488
2489
2490 /**
2491 * nes_dereg_mr
2492 */
2493 static int nes_dereg_mr(struct ib_mr *ib_mr)
2494 {
2495 struct nes_mr *nesmr = to_nesmr(ib_mr);
2496 struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2497 struct nes_device *nesdev = nesvnic->nesdev;
2498 struct nes_adapter *nesadapter = nesdev->nesadapter;
2499 struct nes_hw_cqp_wqe *cqp_wqe;
2500 struct nes_cqp_request *cqp_request;
2501 unsigned long flags;
2502 int ret;
2503 u16 major_code;
2504 u16 minor_code;
2505
2506
2507 if (nesmr->pages)
2508 pci_free_consistent(nesdev->pcidev,
2509 nesmr->max_pages * sizeof(u64),
2510 nesmr->pages,
2511 nesmr->paddr);
2512
2513 if (nesmr->region) {
2514 ib_umem_release(nesmr->region);
2515 }
2516 if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2517 kfree(nesmr);
2518 return 0;
2519 }
2520
2521 /* Deallocate the region with the adapter */
2522
2523 cqp_request = nes_get_cqp_request(nesdev);
2524 if (cqp_request == NULL) {
2525 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2526 return -ENOMEM;
2527 }
2528 cqp_request->waiting = 1;
2529 cqp_wqe = &cqp_request->cqp_wqe;
2530
2531 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2532 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2533 NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2534 NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2535 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2536
2537 atomic_set(&cqp_request->refcount, 2);
2538 nes_post_cqp_request(nesdev, cqp_request);
2539
2540 /* Wait for CQP */
2541 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2542 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2543 NES_EVENT_TIMEOUT);
2544 nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2545 " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2546 ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2547
2548 major_code = cqp_request->major_code;
2549 minor_code = cqp_request->minor_code;
2550
2551 nes_put_cqp_request(nesdev, cqp_request);
2552
2553 if (!ret) {
2554 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2555 " ib_mr=%p, rkey = 0x%08X\n",
2556 ib_mr, ib_mr->rkey);
2557 return -ETIME;
2558 } else if (major_code) {
2559 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2560 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2561 major_code, minor_code, ib_mr, ib_mr->rkey);
2562 return -EIO;
2563 }
2564
2565 if (nesmr->pbls_used != 0) {
2566 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2567 if (nesmr->pbl_4k) {
2568 nesadapter->free_4kpbl += nesmr->pbls_used;
2569 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2570 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2571 "exceeded the max(%u)\n",
2572 nesadapter->free_4kpbl,
2573 nesadapter->max_4kpbl);
2574 } else {
2575 nesadapter->free_256pbl += nesmr->pbls_used;
2576 if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2577 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2578 "exceeded the max(%u)\n",
2579 nesadapter->free_256pbl,
2580 nesadapter->max_256pbl);
2581 }
2582 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2583 }
2584 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2585 (ib_mr->rkey & 0x0fffff00) >> 8);
2586
2587 kfree(nesmr);
2588
2589 return 0;
2590 }
2591
2592
2593 /**
2594 * show_rev
2595 */
2596 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2597 char *buf)
2598 {
2599 struct nes_ib_device *nesibdev =
2600 container_of(dev, struct nes_ib_device, ibdev.dev);
2601 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2602
2603 nes_debug(NES_DBG_INIT, "\n");
2604 return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2605 }
2606
2607
2608 /**
2609 * show_hca
2610 */
2611 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2612 char *buf)
2613 {
2614 nes_debug(NES_DBG_INIT, "\n");
2615 return sprintf(buf, "NES020\n");
2616 }
2617
2618
2619 /**
2620 * show_board
2621 */
2622 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2623 char *buf)
2624 {
2625 nes_debug(NES_DBG_INIT, "\n");
2626 return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2627 }
2628
2629
2630 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2631 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2632 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2633
2634 static struct device_attribute *nes_dev_attributes[] = {
2635 &dev_attr_hw_rev,
2636 &dev_attr_hca_type,
2637 &dev_attr_board_id
2638 };
2639
2640
2641 /**
2642 * nes_query_qp
2643 */
2644 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2645 int attr_mask, struct ib_qp_init_attr *init_attr)
2646 {
2647 struct nes_qp *nesqp = to_nesqp(ibqp);
2648
2649 nes_debug(NES_DBG_QP, "\n");
2650
2651 attr->qp_access_flags = 0;
2652 attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2653 attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2654 attr->cap.max_recv_sge = 1;
2655 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2656 attr->cap.max_inline_data = 0;
2657 else
2658 attr->cap.max_inline_data = 64;
2659
2660 init_attr->event_handler = nesqp->ibqp.event_handler;
2661 init_attr->qp_context = nesqp->ibqp.qp_context;
2662 init_attr->send_cq = nesqp->ibqp.send_cq;
2663 init_attr->recv_cq = nesqp->ibqp.recv_cq;
2664 init_attr->srq = nesqp->ibqp.srq;
2665 init_attr->cap = attr->cap;
2666
2667 return 0;
2668 }
2669
2670
2671 /**
2672 * nes_hw_modify_qp
2673 */
2674 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2675 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2676 {
2677 struct nes_hw_cqp_wqe *cqp_wqe;
2678 /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2679 /* struct iw_cm_event cm_event; */
2680 struct nes_cqp_request *cqp_request;
2681 int ret;
2682 u16 major_code;
2683
2684 nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2685 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2686
2687 cqp_request = nes_get_cqp_request(nesdev);
2688 if (cqp_request == NULL) {
2689 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2690 return -ENOMEM;
2691 }
2692 if (wait_completion) {
2693 cqp_request->waiting = 1;
2694 } else {
2695 cqp_request->waiting = 0;
2696 }
2697 cqp_wqe = &cqp_request->cqp_wqe;
2698
2699 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2700 NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2701 nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2702 next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2703 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2704 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2705 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2706
2707 /* If sending a terminate message, fill in the length (in words) */
2708 if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2709 !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2710 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2711 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2712 }
2713
2714 atomic_set(&cqp_request->refcount, 2);
2715 nes_post_cqp_request(nesdev, cqp_request);
2716
2717 /* Wait for CQP */
2718 if (wait_completion) {
2719 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2720 nesqp->hwqp.qp_id); */
2721 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2722 NES_EVENT_TIMEOUT);
2723 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2724 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2725 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2726 major_code = cqp_request->major_code;
2727 if (major_code) {
2728 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2729 "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2730 nesqp->hwqp.qp_id, cqp_request->major_code,
2731 cqp_request->minor_code, next_iwarp_state);
2732 }
2733
2734 nes_put_cqp_request(nesdev, cqp_request);
2735
2736 if (!ret)
2737 return -ETIME;
2738 else if (major_code)
2739 return -EIO;
2740 else
2741 return 0;
2742 } else {
2743 return 0;
2744 }
2745 }
2746
2747
2748 /**
2749 * nes_modify_qp
2750 */
2751 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2752 int attr_mask, struct ib_udata *udata)
2753 {
2754 struct nes_qp *nesqp = to_nesqp(ibqp);
2755 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2756 struct nes_device *nesdev = nesvnic->nesdev;
2757 /* u32 cqp_head; */
2758 /* u32 counter; */
2759 u32 next_iwarp_state = 0;
2760 int err;
2761 unsigned long qplockflags;
2762 int ret;
2763 u16 original_last_aeq;
2764 u8 issue_modify_qp = 0;
2765 u8 dont_wait = 0;
2766
2767 nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2768 " iwarp_state=0x%X, refcount=%d\n",
2769 nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2770 nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2771
2772 spin_lock_irqsave(&nesqp->lock, qplockflags);
2773
2774 nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2775 " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2776 nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2777 nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2778
2779 if (attr_mask & IB_QP_STATE) {
2780 switch (attr->qp_state) {
2781 case IB_QPS_INIT:
2782 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2783 nesqp->hwqp.qp_id);
2784 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2785 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2786 return -EINVAL;
2787 }
2788 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2789 issue_modify_qp = 1;
2790 break;
2791 case IB_QPS_RTR:
2792 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2793 nesqp->hwqp.qp_id);
2794 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2795 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2796 return -EINVAL;
2797 }
2798 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2799 issue_modify_qp = 1;
2800 break;
2801 case IB_QPS_RTS:
2802 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2803 nesqp->hwqp.qp_id);
2804 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2805 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2806 return -EINVAL;
2807 }
2808 if (nesqp->cm_id == NULL) {
2809 nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2810 nesqp->hwqp.qp_id );
2811 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2812 return -EINVAL;
2813 }
2814 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2815 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2816 next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2817 NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2818 issue_modify_qp = 1;
2819 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2820 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2821 nesqp->hte_added = 1;
2822 break;
2823 case IB_QPS_SQD:
2824 issue_modify_qp = 1;
2825 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2826 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2827 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2828 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2829 return 0;
2830 } else {
2831 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2832 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2833 " ignored due to current iWARP state\n",
2834 nesqp->hwqp.qp_id);
2835 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2836 return -EINVAL;
2837 }
2838 if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2839 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2840 " already done based on hw state.\n",
2841 nesqp->hwqp.qp_id);
2842 issue_modify_qp = 0;
2843 }
2844 switch (nesqp->hw_iwarp_state) {
2845 case NES_AEQE_IWARP_STATE_CLOSING:
2846 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2847 break;
2848 case NES_AEQE_IWARP_STATE_TERMINATE:
2849 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2850 break;
2851 case NES_AEQE_IWARP_STATE_ERROR:
2852 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2853 break;
2854 default:
2855 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2856 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2857 break;
2858 }
2859 }
2860 break;
2861 case IB_QPS_SQE:
2862 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2863 nesqp->hwqp.qp_id);
2864 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2865 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2866 return -EINVAL;
2867 }
2868 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2869 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2870 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2871 issue_modify_qp = 1;
2872 break;
2873 case IB_QPS_ERR:
2874 case IB_QPS_RESET:
2875 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2876 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2877 return -EINVAL;
2878 }
2879 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2880 nesqp->hwqp.qp_id);
2881 if (nesqp->term_flags)
2882 del_timer(&nesqp->terminate_timer);
2883
2884 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2885 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2886 if (nesqp->hte_added) {
2887 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2888 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2889 nesqp->hte_added = 0;
2890 }
2891 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2892 (nesdev->iw_status) &&
2893 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2894 next_iwarp_state |= NES_CQP_QP_RESET;
2895 } else {
2896 nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2897 nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2898 dont_wait = 1;
2899 }
2900 issue_modify_qp = 1;
2901 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2902 break;
2903 default:
2904 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2905 return -EINVAL;
2906 break;
2907 }
2908
2909 nesqp->ibqp_state = attr->qp_state;
2910 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2911 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2912 nesqp->iwarp_state);
2913 }
2914
2915 if (attr_mask & IB_QP_ACCESS_FLAGS) {
2916 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2917 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2918 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2919 issue_modify_qp = 1;
2920 }
2921 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2922 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2923 issue_modify_qp = 1;
2924 }
2925 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2926 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2927 issue_modify_qp = 1;
2928 }
2929 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2930 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2931 issue_modify_qp = 1;
2932 }
2933
2934 if (nesqp->user_mode) {
2935 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2936 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2937 issue_modify_qp = 1;
2938 }
2939 }
2940
2941 original_last_aeq = nesqp->last_aeq;
2942 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2943
2944 nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2945
2946 ret = 0;
2947
2948
2949 if (issue_modify_qp) {
2950 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2951 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2952 if (ret)
2953 nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2954 " failed for QP%u.\n",
2955 next_iwarp_state, nesqp->hwqp.qp_id);
2956
2957 }
2958
2959 if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2960 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2961 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2962 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2963 original_last_aeq, nesqp->last_aeq);
2964 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2965 if (dont_wait) {
2966 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2967 nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2968 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2969 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2970 original_last_aeq, nesqp->last_aeq);
2971 /* this one is for the cm_disconnect thread */
2972 spin_lock_irqsave(&nesqp->lock, qplockflags);
2973 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2974 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2975 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2976 nes_cm_disconn(nesqp);
2977 } else {
2978 nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2979 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2980 }
2981 } else {
2982 spin_lock_irqsave(&nesqp->lock, qplockflags);
2983 if (nesqp->cm_id) {
2984 /* These two are for the timer thread */
2985 if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
2986 nesqp->cm_id->add_ref(nesqp->cm_id);
2987 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2988 " need ae to finish up, original_last_aeq = 0x%04X."
2989 " last_aeq = 0x%04X, scheduling timer.\n",
2990 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2991 original_last_aeq, nesqp->last_aeq);
2992 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
2993 }
2994 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2995 } else {
2996 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2997 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2998 " need ae to finish up, original_last_aeq = 0x%04X."
2999 " last_aeq = 0x%04X.\n",
3000 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3001 original_last_aeq, nesqp->last_aeq);
3002 }
3003 }
3004 } else {
3005 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3006 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3007 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3008 original_last_aeq, nesqp->last_aeq);
3009 }
3010 } else {
3011 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3012 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3013 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3014 original_last_aeq, nesqp->last_aeq);
3015 }
3016
3017 err = 0;
3018
3019 nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3020 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3021
3022 return err;
3023 }
3024
3025
3026 /**
3027 * nes_muticast_attach
3028 */
3029 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3030 {
3031 nes_debug(NES_DBG_INIT, "\n");
3032 return -ENOSYS;
3033 }
3034
3035
3036 /**
3037 * nes_multicast_detach
3038 */
3039 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3040 {
3041 nes_debug(NES_DBG_INIT, "\n");
3042 return -ENOSYS;
3043 }
3044
3045
3046 /**
3047 * nes_process_mad
3048 */
3049 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3050 u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
3051 const struct ib_mad_hdr *in, size_t in_mad_size,
3052 struct ib_mad_hdr *out, size_t *out_mad_size,
3053 u16 *out_mad_pkey_index)
3054 {
3055 nes_debug(NES_DBG_INIT, "\n");
3056 return -ENOSYS;
3057 }
3058
3059 static inline void
3060 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3061 {
3062 int sge_index;
3063 int total_payload_length = 0;
3064 for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3065 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3066 ib_wr->sg_list[sge_index].addr);
3067 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3068 ib_wr->sg_list[sge_index].length);
3069 if (uselkey)
3070 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3071 (ib_wr->sg_list[sge_index].lkey));
3072 else
3073 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3074
3075 total_payload_length += ib_wr->sg_list[sge_index].length;
3076 }
3077 nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3078 total_payload_length);
3079 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3080 total_payload_length);
3081 }
3082
3083 /**
3084 * nes_post_send
3085 */
3086 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3087 struct ib_send_wr **bad_wr)
3088 {
3089 u64 u64temp;
3090 unsigned long flags = 0;
3091 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3092 struct nes_device *nesdev = nesvnic->nesdev;
3093 struct nes_qp *nesqp = to_nesqp(ibqp);
3094 struct nes_hw_qp_wqe *wqe;
3095 int err = 0;
3096 u32 qsize = nesqp->hwqp.sq_size;
3097 u32 head;
3098 u32 wqe_misc = 0;
3099 u32 wqe_count = 0;
3100 u32 counter;
3101
3102 if (nesqp->ibqp_state > IB_QPS_RTS) {
3103 err = -EINVAL;
3104 goto out;
3105 }
3106
3107 spin_lock_irqsave(&nesqp->lock, flags);
3108
3109 head = nesqp->hwqp.sq_head;
3110
3111 while (ib_wr) {
3112 /* Check for QP error */
3113 if (nesqp->term_flags) {
3114 err = -EINVAL;
3115 break;
3116 }
3117
3118 /* Check for SQ overflow */
3119 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3120 err = -ENOMEM;
3121 break;
3122 }
3123
3124 wqe = &nesqp->hwqp.sq_vbase[head];
3125 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3126 nesqp->hwqp.qp_id, wqe, head); */
3127 nes_fill_init_qp_wqe(wqe, nesqp, head);
3128 u64temp = (u64)(ib_wr->wr_id);
3129 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3130 u64temp);
3131 switch (ib_wr->opcode) {
3132 case IB_WR_SEND:
3133 case IB_WR_SEND_WITH_INV:
3134 if (IB_WR_SEND == ib_wr->opcode) {
3135 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3136 wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3137 else
3138 wqe_misc = NES_IWARP_SQ_OP_SEND;
3139 } else {
3140 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3141 wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3142 else
3143 wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3144
3145 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3146 ib_wr->ex.invalidate_rkey);
3147 }
3148
3149 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3150 err = -EINVAL;
3151 break;
3152 }
3153
3154 if (ib_wr->send_flags & IB_SEND_FENCE)
3155 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3156
3157 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3158 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3159 (ib_wr->sg_list[0].length <= 64)) {
3160 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3161 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3162 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3163 ib_wr->sg_list[0].length);
3164 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3165 } else {
3166 fill_wqe_sg_send(wqe, ib_wr, 1);
3167 }
3168
3169 break;
3170 case IB_WR_RDMA_WRITE:
3171 wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3172 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3173 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3174 ib_wr->num_sge, nesdev->nesadapter->max_sge);
3175 err = -EINVAL;
3176 break;
3177 }
3178
3179 if (ib_wr->send_flags & IB_SEND_FENCE)
3180 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3181
3182 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3183 rdma_wr(ib_wr)->rkey);
3184 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3185 rdma_wr(ib_wr)->remote_addr);
3186
3187 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3188 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3189 (ib_wr->sg_list[0].length <= 64)) {
3190 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3191 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3192 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3193 ib_wr->sg_list[0].length);
3194 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3195 } else {
3196 fill_wqe_sg_send(wqe, ib_wr, 1);
3197 }
3198
3199 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3200 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3201 break;
3202 case IB_WR_RDMA_READ:
3203 case IB_WR_RDMA_READ_WITH_INV:
3204 /* iWARP only supports 1 sge for RDMA reads */
3205 if (ib_wr->num_sge > 1) {
3206 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3207 ib_wr->num_sge);
3208 err = -EINVAL;
3209 break;
3210 }
3211 if (ib_wr->opcode == IB_WR_RDMA_READ) {
3212 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3213 } else {
3214 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3215 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3216 ib_wr->ex.invalidate_rkey);
3217 }
3218
3219 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3220 rdma_wr(ib_wr)->remote_addr);
3221 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3222 rdma_wr(ib_wr)->rkey);
3223 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3224 ib_wr->sg_list->length);
3225 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3226 ib_wr->sg_list->addr);
3227 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3228 ib_wr->sg_list->lkey);
3229 break;
3230 case IB_WR_LOCAL_INV:
3231 wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3232 set_wqe_32bit_value(wqe->wqe_words,
3233 NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3234 ib_wr->ex.invalidate_rkey);
3235 break;
3236 case IB_WR_REG_MR:
3237 {
3238 struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3239 int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3240 int flags = reg_wr(ib_wr)->access;
3241
3242 if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3243 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3244 err = -EINVAL;
3245 break;
3246 }
3247 wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3248 set_wqe_64bit_value(wqe->wqe_words,
3249 NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3250 mr->ibmr.iova);
3251 set_wqe_32bit_value(wqe->wqe_words,
3252 NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3253 mr->ibmr.length);
3254 set_wqe_32bit_value(wqe->wqe_words,
3255 NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3256 set_wqe_32bit_value(wqe->wqe_words,
3257 NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3258 reg_wr(ib_wr)->key);
3259
3260 if (page_shift == 12) {
3261 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3262 } else if (page_shift == 21) {
3263 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3264 } else {
3265 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3266 " ib_wr=%u, max=1\n", ib_wr->num_sge);
3267 err = -EINVAL;
3268 break;
3269 }
3270
3271 /* Set access_flags */
3272 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3273 if (flags & IB_ACCESS_LOCAL_WRITE)
3274 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3275
3276 if (flags & IB_ACCESS_REMOTE_WRITE)
3277 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3278
3279 if (flags & IB_ACCESS_REMOTE_READ)
3280 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3281
3282 if (flags & IB_ACCESS_MW_BIND)
3283 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3284
3285 /* Fill in PBL info: */
3286 set_wqe_64bit_value(wqe->wqe_words,
3287 NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3288 mr->paddr);
3289
3290 set_wqe_32bit_value(wqe->wqe_words,
3291 NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3292 mr->npages * 8);
3293
3294 nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3295 "length: %d, rkey: %0x, pgl_paddr: %llx, "
3296 "page_list_len: %u, wqe_misc: %x\n",
3297 (unsigned long long) mr->ibmr.iova,
3298 mr->ibmr.length,
3299 reg_wr(ib_wr)->key,
3300 (unsigned long long) mr->paddr,
3301 mr->npages,
3302 wqe_misc);
3303 break;
3304 }
3305 default:
3306 /* error */
3307 err = -EINVAL;
3308 break;
3309 }
3310
3311 if (err)
3312 break;
3313
3314 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3315 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3316
3317 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3318
3319 ib_wr = ib_wr->next;
3320 head++;
3321 wqe_count++;
3322 if (head >= qsize)
3323 head = 0;
3324
3325 }
3326
3327 nesqp->hwqp.sq_head = head;
3328 barrier();
3329 while (wqe_count) {
3330 counter = min(wqe_count, ((u32)255));
3331 wqe_count -= counter;
3332 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3333 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3334 }
3335
3336 spin_unlock_irqrestore(&nesqp->lock, flags);
3337
3338 out:
3339 if (err)
3340 *bad_wr = ib_wr;
3341 return err;
3342 }
3343
3344
3345 /**
3346 * nes_post_recv
3347 */
3348 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3349 struct ib_recv_wr **bad_wr)
3350 {
3351 u64 u64temp;
3352 unsigned long flags = 0;
3353 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3354 struct nes_device *nesdev = nesvnic->nesdev;
3355 struct nes_qp *nesqp = to_nesqp(ibqp);
3356 struct nes_hw_qp_wqe *wqe;
3357 int err = 0;
3358 int sge_index;
3359 u32 qsize = nesqp->hwqp.rq_size;
3360 u32 head;
3361 u32 wqe_count = 0;
3362 u32 counter;
3363 u32 total_payload_length;
3364
3365 if (nesqp->ibqp_state > IB_QPS_RTS) {
3366 err = -EINVAL;
3367 goto out;
3368 }
3369
3370 spin_lock_irqsave(&nesqp->lock, flags);
3371
3372 head = nesqp->hwqp.rq_head;
3373
3374 while (ib_wr) {
3375 /* Check for QP error */
3376 if (nesqp->term_flags) {
3377 err = -EINVAL;
3378 break;
3379 }
3380
3381 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3382 err = -EINVAL;
3383 break;
3384 }
3385 /* Check for RQ overflow */
3386 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3387 err = -ENOMEM;
3388 break;
3389 }
3390
3391 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3392 wqe = &nesqp->hwqp.rq_vbase[head];
3393
3394 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3395 nesqp->hwqp.qp_id, wqe, head); */
3396 nes_fill_init_qp_wqe(wqe, nesqp, head);
3397 u64temp = (u64)(ib_wr->wr_id);
3398 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3399 u64temp);
3400 total_payload_length = 0;
3401 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3402 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3403 ib_wr->sg_list[sge_index].addr);
3404 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3405 ib_wr->sg_list[sge_index].length);
3406 set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3407 ib_wr->sg_list[sge_index].lkey);
3408
3409 total_payload_length += ib_wr->sg_list[sge_index].length;
3410 }
3411 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3412 total_payload_length);
3413
3414 ib_wr = ib_wr->next;
3415 head++;
3416 wqe_count++;
3417 if (head >= qsize)
3418 head = 0;
3419 }
3420
3421 nesqp->hwqp.rq_head = head;
3422 barrier();
3423 while (wqe_count) {
3424 counter = min(wqe_count, ((u32)255));
3425 wqe_count -= counter;
3426 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3427 }
3428
3429 spin_unlock_irqrestore(&nesqp->lock, flags);
3430
3431 out:
3432 if (err)
3433 *bad_wr = ib_wr;
3434 return err;
3435 }
3436
3437 /**
3438 * nes_drain_sq - drain sq
3439 * @ibqp: pointer to ibqp
3440 */
3441 static void nes_drain_sq(struct ib_qp *ibqp)
3442 {
3443 struct nes_qp *nesqp = to_nesqp(ibqp);
3444
3445 if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
3446 wait_for_completion(&nesqp->sq_drained);
3447 }
3448
3449 /**
3450 * nes_drain_rq - drain rq
3451 * @ibqp: pointer to ibqp
3452 */
3453 static void nes_drain_rq(struct ib_qp *ibqp)
3454 {
3455 struct nes_qp *nesqp = to_nesqp(ibqp);
3456
3457 if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
3458 wait_for_completion(&nesqp->rq_drained);
3459 }
3460
3461 /**
3462 * nes_poll_cq
3463 */
3464 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3465 {
3466 u64 u64temp;
3467 u64 wrid;
3468 unsigned long flags = 0;
3469 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3470 struct nes_device *nesdev = nesvnic->nesdev;
3471 struct nes_cq *nescq = to_nescq(ibcq);
3472 struct nes_qp *nesqp;
3473 struct nes_hw_cqe cqe;
3474 u32 head;
3475 u32 wq_tail = 0;
3476 u32 cq_size;
3477 u32 cqe_count = 0;
3478 u32 wqe_index;
3479 u32 u32temp;
3480 u32 move_cq_head = 1;
3481 u32 err_code;
3482
3483 nes_debug(NES_DBG_CQ, "\n");
3484
3485 spin_lock_irqsave(&nescq->lock, flags);
3486
3487 head = nescq->hw_cq.cq_head;
3488 cq_size = nescq->hw_cq.cq_size;
3489
3490 while (cqe_count < num_entries) {
3491 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3492 NES_CQE_VALID) == 0)
3493 break;
3494
3495 /*
3496 * Make sure we read CQ entry contents *after*
3497 * we've checked the valid bit.
3498 */
3499 rmb();
3500
3501 cqe = nescq->hw_cq.cq_vbase[head];
3502 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3503 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3504 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3505 /* parse CQE, get completion context from WQE (either rq or sq) */
3506 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3507 ((u64)u32temp);
3508
3509 if (u64temp) {
3510 nesqp = (struct nes_qp *)(unsigned long)u64temp;
3511 memset(entry, 0, sizeof *entry);
3512 if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3513 entry->status = IB_WC_SUCCESS;
3514 } else {
3515 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3516 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3517 entry->status = err_code & 0x0000ffff;
3518
3519 /* The rest of the cqe's will be marked as flushed */
3520 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3521 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3522 NES_IWARP_CQE_MINOR_FLUSH);
3523 } else
3524 entry->status = IB_WC_WR_FLUSH_ERR;
3525 }
3526
3527 entry->qp = &nesqp->ibqp;
3528 entry->src_qp = nesqp->hwqp.qp_id;
3529
3530 if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3531 if (nesqp->skip_lsmm) {
3532 nesqp->skip_lsmm = 0;
3533 nesqp->hwqp.sq_tail++;
3534 }
3535
3536 /* Working on a SQ Completion*/
3537 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3538 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3539 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3540 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3541 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3542 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3543
3544 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3545 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3546 case NES_IWARP_SQ_OP_RDMAW:
3547 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3548 entry->opcode = IB_WC_RDMA_WRITE;
3549 break;
3550 case NES_IWARP_SQ_OP_RDMAR:
3551 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3552 entry->opcode = IB_WC_RDMA_READ;
3553 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3554 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3555 break;
3556 case NES_IWARP_SQ_OP_SENDINV:
3557 case NES_IWARP_SQ_OP_SENDSEINV:
3558 case NES_IWARP_SQ_OP_SEND:
3559 case NES_IWARP_SQ_OP_SENDSE:
3560 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3561 entry->opcode = IB_WC_SEND;
3562 break;
3563 case NES_IWARP_SQ_OP_LOCINV:
3564 entry->opcode = IB_WC_LOCAL_INV;
3565 break;
3566 case NES_IWARP_SQ_OP_FAST_REG:
3567 entry->opcode = IB_WC_REG_MR;
3568 break;
3569 }
3570
3571 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3572 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3573 move_cq_head = 0;
3574 wq_tail = nesqp->hwqp.sq_tail;
3575 }
3576 } else {
3577 /* Working on a RQ Completion*/
3578 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3579 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3580 ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3581 entry->opcode = IB_WC_RECV;
3582
3583 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3584 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3585 move_cq_head = 0;
3586 wq_tail = nesqp->hwqp.rq_tail;
3587 }
3588 }
3589
3590 if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
3591 if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
3592 complete(&nesqp->sq_drained);
3593 if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
3594 complete(&nesqp->rq_drained);
3595 }
3596
3597 entry->wr_id = wrid;
3598 entry++;
3599 cqe_count++;
3600 }
3601
3602 if (move_cq_head) {
3603 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3604 if (++head >= cq_size)
3605 head = 0;
3606 nescq->polled_completions++;
3607
3608 if ((nescq->polled_completions > (cq_size / 2)) ||
3609 (nescq->polled_completions == 255)) {
3610 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3611 " are pending %u of %u.\n",
3612 nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3613 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3614 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3615 nescq->polled_completions = 0;
3616 }
3617 } else {
3618 /* Update the wqe index and set status to flush */
3619 wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3620 wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3621 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3622 cpu_to_le32(wqe_index);
3623 move_cq_head = 1; /* ready for next pass */
3624 }
3625 }
3626
3627 if (nescq->polled_completions) {
3628 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3629 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3630 nescq->polled_completions = 0;
3631 }
3632
3633 nescq->hw_cq.cq_head = head;
3634 nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3635 cqe_count, nescq->hw_cq.cq_number);
3636
3637 spin_unlock_irqrestore(&nescq->lock, flags);
3638
3639 return cqe_count;
3640 }
3641
3642
3643 /**
3644 * nes_req_notify_cq
3645 */
3646 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3647 {
3648 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3649 struct nes_device *nesdev = nesvnic->nesdev;
3650 struct nes_cq *nescq = to_nescq(ibcq);
3651 u32 cq_arm;
3652
3653 nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3654 nescq->hw_cq.cq_number);
3655
3656 cq_arm = nescq->hw_cq.cq_number;
3657 if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3658 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3659 else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3660 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3661 else
3662 return -EINVAL;
3663
3664 nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3665 nes_read32(nesdev->regs+NES_CQE_ALLOC);
3666
3667 return 0;
3668 }
3669
3670 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3671 struct ib_port_immutable *immutable)
3672 {
3673 struct ib_port_attr attr;
3674 int err;
3675
3676 err = nes_query_port(ibdev, port_num, &attr);
3677 if (err)
3678 return err;
3679
3680 immutable->pkey_tbl_len = attr.pkey_tbl_len;
3681 immutable->gid_tbl_len = attr.gid_tbl_len;
3682 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3683
3684 return 0;
3685 }
3686
3687 static void get_dev_fw_str(struct ib_device *dev, char *str,
3688 size_t str_len)
3689 {
3690 struct nes_ib_device *nesibdev =
3691 container_of(dev, struct nes_ib_device, ibdev);
3692 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3693
3694 nes_debug(NES_DBG_INIT, "\n");
3695 snprintf(str, str_len, "%u.%u",
3696 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
3697 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
3698 }
3699
3700 /**
3701 * nes_init_ofa_device
3702 */
3703 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3704 {
3705 struct nes_ib_device *nesibdev;
3706 struct nes_vnic *nesvnic = netdev_priv(netdev);
3707 struct nes_device *nesdev = nesvnic->nesdev;
3708
3709 nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3710 if (nesibdev == NULL) {
3711 return NULL;
3712 }
3713 strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3714 nesibdev->ibdev.owner = THIS_MODULE;
3715
3716 nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3717 memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3718 memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3719
3720 nesibdev->ibdev.uverbs_cmd_mask =
3721 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3722 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3723 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3724 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3725 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3726 (1ull << IB_USER_VERBS_CMD_REG_MR) |
3727 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3728 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3729 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3730 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3731 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3732 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3733 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3734 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3735 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3736 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3737 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3738 (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3739 (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3740 (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3741 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3742 (1ull << IB_USER_VERBS_CMD_POST_SEND);
3743
3744 nesibdev->ibdev.phys_port_cnt = 1;
3745 nesibdev->ibdev.num_comp_vectors = 1;
3746 nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3747 nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3748 nesibdev->ibdev.query_device = nes_query_device;
3749 nesibdev->ibdev.query_port = nes_query_port;
3750 nesibdev->ibdev.query_pkey = nes_query_pkey;
3751 nesibdev->ibdev.query_gid = nes_query_gid;
3752 nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3753 nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3754 nesibdev->ibdev.mmap = nes_mmap;
3755 nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3756 nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3757 nesibdev->ibdev.create_ah = nes_create_ah;
3758 nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3759 nesibdev->ibdev.create_qp = nes_create_qp;
3760 nesibdev->ibdev.modify_qp = nes_modify_qp;
3761 nesibdev->ibdev.query_qp = nes_query_qp;
3762 nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3763 nesibdev->ibdev.create_cq = nes_create_cq;
3764 nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3765 nesibdev->ibdev.poll_cq = nes_poll_cq;
3766 nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3767 nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3768 nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3769 nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3770 nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3771
3772 nesibdev->ibdev.alloc_mr = nes_alloc_mr;
3773 nesibdev->ibdev.map_mr_sg = nes_map_mr_sg;
3774
3775 nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3776 nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3777 nesibdev->ibdev.process_mad = nes_process_mad;
3778
3779 nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3780 nesibdev->ibdev.post_send = nes_post_send;
3781 nesibdev->ibdev.post_recv = nes_post_recv;
3782 nesibdev->ibdev.drain_sq = nes_drain_sq;
3783 nesibdev->ibdev.drain_rq = nes_drain_rq;
3784
3785 nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3786 if (nesibdev->ibdev.iwcm == NULL) {
3787 ib_dealloc_device(&nesibdev->ibdev);
3788 return NULL;
3789 }
3790 nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3791 nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3792 nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3793 nesibdev->ibdev.iwcm->connect = nes_connect;
3794 nesibdev->ibdev.iwcm->accept = nes_accept;
3795 nesibdev->ibdev.iwcm->reject = nes_reject;
3796 nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3797 nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3798 nesibdev->ibdev.get_port_immutable = nes_port_immutable;
3799 nesibdev->ibdev.get_dev_fw_str = get_dev_fw_str;
3800 memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3801 sizeof(nesibdev->ibdev.iwcm->ifname));
3802
3803 return nesibdev;
3804 }
3805
3806
3807 /**
3808 * nes_handle_delayed_event
3809 */
3810 static void nes_handle_delayed_event(unsigned long data)
3811 {
3812 struct nes_vnic *nesvnic = (void *) data;
3813
3814 if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3815 struct ib_event event;
3816
3817 event.device = &nesvnic->nesibdev->ibdev;
3818 if (!event.device)
3819 goto stop_timer;
3820 event.event = nesvnic->delayed_event;
3821 event.element.port_num = nesvnic->logical_port + 1;
3822 ib_dispatch_event(&event);
3823 }
3824
3825 stop_timer:
3826 nesvnic->event_timer.function = NULL;
3827 }
3828
3829
3830 void nes_port_ibevent(struct nes_vnic *nesvnic)
3831 {
3832 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3833 struct nes_device *nesdev = nesvnic->nesdev;
3834 struct ib_event event;
3835 event.device = &nesibdev->ibdev;
3836 event.element.port_num = nesvnic->logical_port + 1;
3837 event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3838
3839 if (!nesvnic->event_timer.function) {
3840 ib_dispatch_event(&event);
3841 nesvnic->last_dispatched_event = event.event;
3842 nesvnic->event_timer.function = nes_handle_delayed_event;
3843 nesvnic->event_timer.data = (unsigned long) nesvnic;
3844 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3845 add_timer(&nesvnic->event_timer);
3846 } else {
3847 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3848 }
3849 nesvnic->delayed_event = event.event;
3850 }
3851
3852
3853 /**
3854 * nes_destroy_ofa_device
3855 */
3856 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3857 {
3858 if (nesibdev == NULL)
3859 return;
3860
3861 nes_unregister_ofa_device(nesibdev);
3862
3863 kfree(nesibdev->ibdev.iwcm);
3864 ib_dealloc_device(&nesibdev->ibdev);
3865 }
3866
3867
3868 /**
3869 * nes_register_ofa_device
3870 */
3871 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3872 {
3873 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3874 struct nes_device *nesdev = nesvnic->nesdev;
3875 struct nes_adapter *nesadapter = nesdev->nesadapter;
3876 int i, ret;
3877
3878 ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
3879 if (ret) {
3880 return ret;
3881 }
3882
3883 /* Get the resources allocated to this device */
3884 nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3885 nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3886 nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3887 nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3888
3889 for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3890 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3891 if (ret) {
3892 while (i > 0) {
3893 i--;
3894 device_remove_file(&nesibdev->ibdev.dev,
3895 nes_dev_attributes[i]);
3896 }
3897 ib_unregister_device(&nesibdev->ibdev);
3898 return ret;
3899 }
3900 }
3901
3902 nesvnic->of_device_registered = 1;
3903
3904 return 0;
3905 }
3906
3907
3908 /**
3909 * nes_unregister_ofa_device
3910 */
3911 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3912 {
3913 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3914 int i;
3915
3916 for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3917 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3918 }
3919
3920 if (nesvnic->of_device_registered) {
3921 ib_unregister_device(&nesibdev->ibdev);
3922 }
3923
3924 nesvnic->of_device_registered = 0;
3925 }
Linux with added FPC-III support