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RDMA: Cleanup undesired pd->uobject usage
[thirdparty/kernel/stable.git] / drivers / infiniband / hw / nes / nes_verbs.c
1 /*
2 * Copyright (c) 2006 - 2011 Intel Corporation. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34 #include <linux/module.h>
35 #include <linux/moduleparam.h>
36 #include <linux/random.h>
37 #include <linux/highmem.h>
38 #include <linux/slab.h>
39 #include <asm/byteorder.h>
40
41 #include <rdma/ib_verbs.h>
42 #include <rdma/iw_cm.h>
43 #include <rdma/ib_user_verbs.h>
44
45 #include "nes.h"
46
47 #include <rdma/ib_umem.h>
48
49 atomic_t mod_qp_timouts;
50 atomic_t qps_created;
51 atomic_t sw_qps_destroyed;
52
53 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
54 static int nes_dereg_mr(struct ib_mr *ib_mr);
55
56 /**
57 * nes_alloc_mw
58 */
59 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
60 struct ib_udata *udata)
61 {
62 struct nes_pd *nespd = to_nespd(ibpd);
63 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
64 struct nes_device *nesdev = nesvnic->nesdev;
65 struct nes_adapter *nesadapter = nesdev->nesadapter;
66 struct nes_cqp_request *cqp_request;
67 struct nes_mr *nesmr;
68 struct ib_mw *ibmw;
69 struct nes_hw_cqp_wqe *cqp_wqe;
70 int ret;
71 u32 stag;
72 u32 stag_index = 0;
73 u32 next_stag_index = 0;
74 u32 driver_key = 0;
75 u8 stag_key = 0;
76
77 if (type != IB_MW_TYPE_1)
78 return ERR_PTR(-EINVAL);
79
80 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
81 stag_key = (u8)next_stag_index;
82
83 driver_key = 0;
84
85 next_stag_index >>= 8;
86 next_stag_index %= nesadapter->max_mr;
87
88 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
89 nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_MW);
90 if (ret) {
91 return ERR_PTR(ret);
92 }
93
94 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
95 if (!nesmr) {
96 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
97 return ERR_PTR(-ENOMEM);
98 }
99
100 stag = stag_index << 8;
101 stag |= driver_key;
102 stag += (u32)stag_key;
103
104 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
105 stag, stag_index);
106
107 /* Register the region with the adapter */
108 cqp_request = nes_get_cqp_request(nesdev);
109 if (cqp_request == NULL) {
110 kfree(nesmr);
111 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
112 return ERR_PTR(-ENOMEM);
113 }
114
115 cqp_request->waiting = 1;
116 cqp_wqe = &cqp_request->cqp_wqe;
117
118 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
119 cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
120 NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
121 NES_CQP_STAG_REM_ACC_EN);
122
123 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
124 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
125 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
126
127 atomic_set(&cqp_request->refcount, 2);
128 nes_post_cqp_request(nesdev, cqp_request);
129
130 /* Wait for CQP */
131 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
132 NES_EVENT_TIMEOUT);
133 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
134 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
135 stag, ret, cqp_request->major_code, cqp_request->minor_code);
136 if ((!ret) || (cqp_request->major_code)) {
137 nes_put_cqp_request(nesdev, cqp_request);
138 kfree(nesmr);
139 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
140 if (!ret) {
141 return ERR_PTR(-ETIME);
142 } else {
143 return ERR_PTR(-ENOMEM);
144 }
145 }
146 nes_put_cqp_request(nesdev, cqp_request);
147
148 nesmr->ibmw.rkey = stag;
149 nesmr->mode = IWNES_MEMREG_TYPE_MW;
150 ibmw = &nesmr->ibmw;
151 nesmr->pbl_4k = 0;
152 nesmr->pbls_used = 0;
153
154 return ibmw;
155 }
156
157
158 /**
159 * nes_dealloc_mw
160 */
161 static int nes_dealloc_mw(struct ib_mw *ibmw)
162 {
163 struct nes_mr *nesmr = to_nesmw(ibmw);
164 struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
165 struct nes_device *nesdev = nesvnic->nesdev;
166 struct nes_adapter *nesadapter = nesdev->nesadapter;
167 struct nes_hw_cqp_wqe *cqp_wqe;
168 struct nes_cqp_request *cqp_request;
169 int err = 0;
170 int ret;
171
172 /* Deallocate the window with the adapter */
173 cqp_request = nes_get_cqp_request(nesdev);
174 if (cqp_request == NULL) {
175 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
176 return -ENOMEM;
177 }
178 cqp_request->waiting = 1;
179 cqp_wqe = &cqp_request->cqp_wqe;
180 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
181 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
182 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
183
184 atomic_set(&cqp_request->refcount, 2);
185 nes_post_cqp_request(nesdev, cqp_request);
186
187 /* Wait for CQP */
188 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
189 ibmw->rkey);
190 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
191 NES_EVENT_TIMEOUT);
192 nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
193 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
194 ret, cqp_request->major_code, cqp_request->minor_code);
195 if (!ret)
196 err = -ETIME;
197 else if (cqp_request->major_code)
198 err = -EIO;
199
200 nes_put_cqp_request(nesdev, cqp_request);
201
202 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
203 (ibmw->rkey & 0x0fffff00) >> 8);
204 kfree(nesmr);
205
206 return err;
207 }
208
209
210 /*
211 * nes_alloc_fast_mr
212 */
213 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
214 u32 stag, u32 page_count)
215 {
216 struct nes_hw_cqp_wqe *cqp_wqe;
217 struct nes_cqp_request *cqp_request;
218 unsigned long flags;
219 int ret;
220 struct nes_adapter *nesadapter = nesdev->nesadapter;
221 u32 opcode = 0;
222 u16 major_code;
223 u64 region_length = page_count * PAGE_SIZE;
224
225
226 cqp_request = nes_get_cqp_request(nesdev);
227 if (cqp_request == NULL) {
228 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
229 return -ENOMEM;
230 }
231 nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
232 "region_length = %llu\n",
233 page_count, region_length);
234 cqp_request->waiting = 1;
235 cqp_wqe = &cqp_request->cqp_wqe;
236
237 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
238 if (nesadapter->free_4kpbl > 0) {
239 nesadapter->free_4kpbl--;
240 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
241 } else {
242 /* No 4kpbl's available: */
243 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
244 nes_debug(NES_DBG_MR, "Out of Pbls\n");
245 nes_free_cqp_request(nesdev, cqp_request);
246 return -ENOMEM;
247 }
248
249 opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
250 NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
251 NES_CQP_STAG_REM_ACC_EN;
252 /*
253 * The current OFED API does not support the zero based TO option.
254 * If added then need to changed the NES_CQP_STAG_VA* option. Also,
255 * the API does not support that ability to have the MR set for local
256 * access only when created and not allow the SQ op to override. Given
257 * this the remote enable must be set here.
258 */
259
260 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
261 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
262 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
263
264 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
265 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
266 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
267 cpu_to_le32(nespd->pd_id & 0x00007fff);
268
269 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
270 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
271 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
272 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
273 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
274 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
275 barrier();
276
277 atomic_set(&cqp_request->refcount, 2);
278 nes_post_cqp_request(nesdev, cqp_request);
279
280 /* Wait for CQP */
281 ret = wait_event_timeout(cqp_request->waitq,
282 (0 != cqp_request->request_done),
283 NES_EVENT_TIMEOUT);
284
285 nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
286 "wait_event_timeout ret = %u, CQP Major:Minor codes = "
287 "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
288 cqp_request->minor_code);
289 major_code = cqp_request->major_code;
290 nes_put_cqp_request(nesdev, cqp_request);
291
292 if (!ret || major_code) {
293 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
294 nesadapter->free_4kpbl++;
295 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
296 }
297
298 if (!ret)
299 return -ETIME;
300 else if (major_code)
301 return -EIO;
302 return 0;
303 }
304
305 /*
306 * nes_alloc_mr
307 */
308 static struct ib_mr *nes_alloc_mr(struct ib_pd *ibpd,
309 enum ib_mr_type mr_type,
310 u32 max_num_sg)
311 {
312 struct nes_pd *nespd = to_nespd(ibpd);
313 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
314 struct nes_device *nesdev = nesvnic->nesdev;
315 struct nes_adapter *nesadapter = nesdev->nesadapter;
316
317 u32 next_stag_index;
318 u8 stag_key = 0;
319 u32 driver_key = 0;
320 int err = 0;
321 u32 stag_index = 0;
322 struct nes_mr *nesmr;
323 u32 stag;
324 int ret;
325 struct ib_mr *ibmr;
326
327 if (mr_type != IB_MR_TYPE_MEM_REG)
328 return ERR_PTR(-EINVAL);
329
330 if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
331 return ERR_PTR(-E2BIG);
332
333 /*
334 * Note: Set to always use a fixed length single page entry PBL. This is to allow
335 * for the fast_reg_mr operation to always know the size of the PBL.
336 */
337 if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
338 return ERR_PTR(-E2BIG);
339
340 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
341 stag_key = (u8)next_stag_index;
342 next_stag_index >>= 8;
343 next_stag_index %= nesadapter->max_mr;
344
345 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
346 nesadapter->max_mr, &stag_index,
347 &next_stag_index, NES_RESOURCE_FAST_MR);
348 if (err)
349 return ERR_PTR(err);
350
351 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
352 if (!nesmr) {
353 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
354 return ERR_PTR(-ENOMEM);
355 }
356
357 stag = stag_index << 8;
358 stag |= driver_key;
359 stag += (u32)stag_key;
360
361 nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
362 stag, stag_index);
363
364 ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_num_sg);
365
366 if (ret == 0) {
367 nesmr->ibmr.rkey = stag;
368 nesmr->ibmr.lkey = stag;
369 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
370 ibmr = &nesmr->ibmr;
371 } else {
372 kfree(nesmr);
373 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
374 return ERR_PTR(-ENOMEM);
375 }
376
377 nesmr->pages = pci_alloc_consistent(nesdev->pcidev,
378 max_num_sg * sizeof(u64),
379 &nesmr->paddr);
380 if (!nesmr->paddr)
381 goto err;
382
383 nesmr->max_pages = max_num_sg;
384
385 return ibmr;
386
387 err:
388 nes_dereg_mr(ibmr);
389
390 return ERR_PTR(-ENOMEM);
391 }
392
393 static int nes_set_page(struct ib_mr *ibmr, u64 addr)
394 {
395 struct nes_mr *nesmr = to_nesmr(ibmr);
396
397 if (unlikely(nesmr->npages == nesmr->max_pages))
398 return -ENOMEM;
399
400 nesmr->pages[nesmr->npages++] = cpu_to_le64(addr);
401
402 return 0;
403 }
404
405 static int nes_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
406 int sg_nents, unsigned int *sg_offset)
407 {
408 struct nes_mr *nesmr = to_nesmr(ibmr);
409
410 nesmr->npages = 0;
411
412 return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, nes_set_page);
413 }
414
415 /**
416 * nes_query_device
417 */
418 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
419 struct ib_udata *uhw)
420 {
421 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
422 struct nes_device *nesdev = nesvnic->nesdev;
423 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
424
425 if (uhw->inlen || uhw->outlen)
426 return -EINVAL;
427
428 memset(props, 0, sizeof(*props));
429 memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
430
431 props->fw_ver = nesdev->nesadapter->firmware_version;
432 props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
433 props->vendor_id = nesdev->nesadapter->vendor_id;
434 props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
435 props->hw_ver = nesdev->nesadapter->hw_rev;
436 props->max_mr_size = 0x80000000;
437 props->max_qp = nesibdev->max_qp;
438 props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
439 props->max_send_sge = nesdev->nesadapter->max_sge;
440 props->max_recv_sge = nesdev->nesadapter->max_sge;
441 props->max_cq = nesibdev->max_cq;
442 props->max_cqe = nesdev->nesadapter->max_cqe;
443 props->max_mr = nesibdev->max_mr;
444 props->max_mw = nesibdev->max_mr;
445 props->max_pd = nesibdev->max_pd;
446 props->max_sge_rd = 1;
447 switch (nesdev->nesadapter->max_irrq_wr) {
448 case 0:
449 props->max_qp_rd_atom = 2;
450 break;
451 case 1:
452 props->max_qp_rd_atom = 8;
453 break;
454 case 2:
455 props->max_qp_rd_atom = 32;
456 break;
457 case 3:
458 props->max_qp_rd_atom = 64;
459 break;
460 default:
461 props->max_qp_rd_atom = 0;
462 }
463 props->max_qp_init_rd_atom = props->max_qp_rd_atom;
464 props->atomic_cap = IB_ATOMIC_NONE;
465 props->max_map_per_fmr = 1;
466
467 return 0;
468 }
469
470
471 /**
472 * nes_query_port
473 */
474 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
475 {
476 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
477 struct net_device *netdev = nesvnic->netdev;
478
479 /* props being zeroed by the caller, avoid zeroing it here */
480
481 props->max_mtu = IB_MTU_4096;
482 props->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
483
484 props->lid = 1;
485 if (netif_queue_stopped(netdev))
486 props->state = IB_PORT_DOWN;
487 else if (nesvnic->linkup)
488 props->state = IB_PORT_ACTIVE;
489 else
490 props->state = IB_PORT_DOWN;
491 props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
492 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
493 props->gid_tbl_len = 1;
494 props->pkey_tbl_len = 1;
495 props->active_width = IB_WIDTH_4X;
496 props->active_speed = IB_SPEED_SDR;
497 props->max_msg_sz = 0x80000000;
498
499 return 0;
500 }
501
502 /**
503 * nes_query_pkey
504 */
505 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
506 {
507 *pkey = 0;
508 return 0;
509 }
510
511
512 /**
513 * nes_query_gid
514 */
515 static int nes_query_gid(struct ib_device *ibdev, u8 port,
516 int index, union ib_gid *gid)
517 {
518 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
519
520 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
521 memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
522
523 return 0;
524 }
525
526
527 /**
528 * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
529 * of all objects associated with a particular user-mode client.
530 */
531 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
532 struct ib_udata *udata)
533 {
534 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
535 struct nes_device *nesdev = nesvnic->nesdev;
536 struct nes_adapter *nesadapter = nesdev->nesadapter;
537 struct nes_alloc_ucontext_req req;
538 struct nes_alloc_ucontext_resp uresp;
539 struct nes_ucontext *nes_ucontext;
540 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
541
542
543 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
544 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
545 return ERR_PTR(-EINVAL);
546 }
547
548 if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
549 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
550 req.userspace_ver, NES_ABI_USERSPACE_VER);
551 return ERR_PTR(-EINVAL);
552 }
553
554
555 memset(&uresp, 0, sizeof uresp);
556
557 uresp.max_qps = nesibdev->max_qp;
558 uresp.max_pds = nesibdev->max_pd;
559 uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
560 uresp.virtwq = nesadapter->virtwq;
561 uresp.kernel_ver = NES_ABI_KERNEL_VER;
562
563 nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
564 if (!nes_ucontext)
565 return ERR_PTR(-ENOMEM);
566
567 nes_ucontext->nesdev = nesdev;
568 nes_ucontext->mmap_wq_offset = uresp.max_pds;
569 nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
570 ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
571 PAGE_SIZE;
572
573
574 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
575 kfree(nes_ucontext);
576 return ERR_PTR(-EFAULT);
577 }
578
579 INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
580 INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
581 atomic_set(&nes_ucontext->usecnt, 1);
582 return &nes_ucontext->ibucontext;
583 }
584
585
586 /**
587 * nes_dealloc_ucontext
588 */
589 static int nes_dealloc_ucontext(struct ib_ucontext *context)
590 {
591 /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
592 /* struct nes_device *nesdev = nesvnic->nesdev; */
593 struct nes_ucontext *nes_ucontext = to_nesucontext(context);
594
595 if (!atomic_dec_and_test(&nes_ucontext->usecnt))
596 return 0;
597 kfree(nes_ucontext);
598 return 0;
599 }
600
601
602 /**
603 * nes_mmap
604 */
605 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
606 {
607 unsigned long index;
608 struct nes_vnic *nesvnic = to_nesvnic(context->device);
609 struct nes_device *nesdev = nesvnic->nesdev;
610 /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
611 struct nes_ucontext *nes_ucontext;
612 struct nes_qp *nesqp;
613
614 nes_ucontext = to_nesucontext(context);
615
616
617 if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
618 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
619 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
620 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
621 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
622 nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
623 return -EFAULT;
624 }
625 nesqp = nes_ucontext->mmap_nesqp[index];
626 if (nesqp == NULL) {
627 nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
628 return -EFAULT;
629 }
630 if (remap_pfn_range(vma, vma->vm_start,
631 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
632 vma->vm_end - vma->vm_start,
633 vma->vm_page_prot)) {
634 nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
635 return -EAGAIN;
636 }
637 vma->vm_private_data = nesqp;
638 return 0;
639 } else {
640 index = vma->vm_pgoff;
641 if (!test_bit(index, nes_ucontext->allocated_doorbells))
642 return -EFAULT;
643
644 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
645 if (io_remap_pfn_range(vma, vma->vm_start,
646 (nesdev->doorbell_start +
647 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
648 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
649 return -EAGAIN;
650 vma->vm_private_data = nes_ucontext;
651 return 0;
652 }
653
654 return -ENOSYS;
655 }
656
657
658 /**
659 * nes_alloc_pd
660 */
661 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
662 struct ib_ucontext *context, struct ib_udata *udata)
663 {
664 struct nes_pd *nespd;
665 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
666 struct nes_device *nesdev = nesvnic->nesdev;
667 struct nes_adapter *nesadapter = nesdev->nesadapter;
668 struct nes_ucontext *nesucontext;
669 struct nes_alloc_pd_resp uresp;
670 u32 pd_num = 0;
671 int err;
672
673 nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
674 nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
675 netdev_refcnt_read(nesvnic->netdev));
676
677 err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
678 nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
679 if (err) {
680 return ERR_PTR(err);
681 }
682
683 nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
684 if (!nespd) {
685 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
686 return ERR_PTR(-ENOMEM);
687 }
688
689 nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
690 nespd, dev_name(&nesvnic->nesibdev->ibdev.dev));
691
692 nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
693
694 if (context) {
695 nesucontext = to_nesucontext(context);
696 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
697 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
698 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
699 nespd->mmap_db_index, nespd->pd_id);
700 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
701 nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
702 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
703 kfree(nespd);
704 return ERR_PTR(-ENOMEM);
705 }
706
707 uresp.pd_id = nespd->pd_id;
708 uresp.mmap_db_index = nespd->mmap_db_index;
709 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
710 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
711 kfree(nespd);
712 return ERR_PTR(-EFAULT);
713 }
714
715 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
716 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
717 nesucontext->first_free_db = nespd->mmap_db_index + 1;
718 }
719
720 nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
721 return &nespd->ibpd;
722 }
723
724
725 /**
726 * nes_dealloc_pd
727 */
728 static int nes_dealloc_pd(struct ib_pd *ibpd)
729 {
730 struct nes_ucontext *nesucontext;
731 struct nes_pd *nespd = to_nespd(ibpd);
732 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
733 struct nes_device *nesdev = nesvnic->nesdev;
734 struct nes_adapter *nesadapter = nesdev->nesadapter;
735
736 if ((ibpd->uobject) && (ibpd->uobject->context)) {
737 nesucontext = to_nesucontext(ibpd->uobject->context);
738 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
739 nespd->mmap_db_index);
740 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
741 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
742 if (nesucontext->first_free_db > nespd->mmap_db_index) {
743 nesucontext->first_free_db = nespd->mmap_db_index;
744 }
745 }
746
747 nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
748 nespd->pd_id, nespd);
749 nes_free_resource(nesadapter, nesadapter->allocated_pds,
750 (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
751 kfree(nespd);
752
753 return 0;
754 }
755
756
757 /**
758 * nes_get_encoded_size
759 */
760 static inline u8 nes_get_encoded_size(int *size)
761 {
762 u8 encoded_size = 0;
763 if (*size <= 32) {
764 *size = 32;
765 encoded_size = 1;
766 } else if (*size <= 128) {
767 *size = 128;
768 encoded_size = 2;
769 } else if (*size <= 512) {
770 *size = 512;
771 encoded_size = 3;
772 }
773 return (encoded_size);
774 }
775
776
777
778 /**
779 * nes_setup_virt_qp
780 */
781 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
782 struct nes_vnic *nesvnic, int sq_size, int rq_size)
783 {
784 unsigned long flags;
785 void *mem;
786 __le64 *pbl = NULL;
787 __le64 *tpbl;
788 __le64 *pblbuffer;
789 struct nes_device *nesdev = nesvnic->nesdev;
790 struct nes_adapter *nesadapter = nesdev->nesadapter;
791 u32 pbl_entries;
792 u8 rq_pbl_entries;
793 u8 sq_pbl_entries;
794
795 pbl_entries = nespbl->pbl_size >> 3;
796 nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
797 nespbl->pbl_size, pbl_entries,
798 (void *)nespbl->pbl_vbase,
799 (unsigned long) nespbl->pbl_pbase);
800 pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
801 /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
802 /* the first pbl to be fro the rq_vbase... */
803 rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
804 sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
805 nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
806 if (!nespbl->page) {
807 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
808 kfree(nespbl);
809 return -ENOMEM;
810 }
811
812 nesqp->hwqp.sq_vbase = kmap(nespbl->page);
813 nesqp->page = nespbl->page;
814 if (!nesqp->hwqp.sq_vbase) {
815 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
816 kfree(nespbl);
817 return -ENOMEM;
818 }
819
820 /* Now to get to sq.. we need to calculate how many */
821 /* PBL entries were used by the rq.. */
822 pbl += sq_pbl_entries;
823 nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
824 /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
825 /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
826
827 nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
828 nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
829 nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
830 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
831 if (!nesadapter->free_256pbl) {
832 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
833 nespbl->pbl_pbase);
834 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
835 kunmap(nesqp->page);
836 kfree(nespbl);
837 return -ENOMEM;
838 }
839 nesadapter->free_256pbl--;
840 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
841
842 nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
843 pblbuffer = nesqp->pbl_vbase;
844 if (!nesqp->pbl_vbase) {
845 /* memory allocated during nes_reg_user_mr() */
846 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
847 nespbl->pbl_pbase);
848 kfree(nespbl);
849 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
850 nesadapter->free_256pbl++;
851 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
852 kunmap(nesqp->page);
853 return -ENOMEM;
854 }
855 memset(nesqp->pbl_vbase, 0, 256);
856 /* fill in the page address in the pbl buffer.. */
857 tpbl = pblbuffer + 16;
858 pbl = (__le64 *)nespbl->pbl_vbase;
859 while (sq_pbl_entries--)
860 *tpbl++ = *pbl++;
861 tpbl = pblbuffer;
862 while (rq_pbl_entries--)
863 *tpbl++ = *pbl++;
864
865 /* done with memory allocated during nes_reg_user_mr() */
866 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
867 nespbl->pbl_pbase);
868 kfree(nespbl);
869
870 nesqp->qp_mem_size =
871 max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256; /* this is Q2 */
872 /* Round up to a multiple of a page */
873 nesqp->qp_mem_size += PAGE_SIZE - 1;
874 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
875
876 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
877 &nesqp->hwqp.q2_pbase);
878
879 if (!mem) {
880 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
881 nesqp->pbl_vbase = NULL;
882 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
883 nesadapter->free_256pbl++;
884 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
885 kunmap(nesqp->page);
886 return -ENOMEM;
887 }
888 nesqp->sq_kmapped = 1;
889 nesqp->hwqp.q2_vbase = mem;
890 mem += 256;
891 memset(nesqp->hwqp.q2_vbase, 0, 256);
892 nesqp->nesqp_context = mem;
893 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
894 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
895
896 return 0;
897 }
898
899
900 /**
901 * nes_setup_mmap_qp
902 */
903 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
904 int sq_size, int rq_size)
905 {
906 void *mem;
907 struct nes_device *nesdev = nesvnic->nesdev;
908
909 nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
910 (sizeof(struct nes_hw_qp_wqe) * rq_size) +
911 max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
912 256; /* this is Q2 */
913 /* Round up to a multiple of a page */
914 nesqp->qp_mem_size += PAGE_SIZE - 1;
915 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
916
917 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
918 &nesqp->hwqp.sq_pbase);
919 if (!mem)
920 return -ENOMEM;
921 nes_debug(NES_DBG_QP, "PCI consistent memory for "
922 "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
923 mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
924
925 memset(mem, 0, nesqp->qp_mem_size);
926
927 nesqp->hwqp.sq_vbase = mem;
928 mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
929
930 nesqp->hwqp.rq_vbase = mem;
931 nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
932 sizeof(struct nes_hw_qp_wqe) * sq_size;
933 mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
934
935 nesqp->hwqp.q2_vbase = mem;
936 nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
937 sizeof(struct nes_hw_qp_wqe) * rq_size;
938 mem += 256;
939 memset(nesqp->hwqp.q2_vbase, 0, 256);
940
941 nesqp->nesqp_context = mem;
942 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
943 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
944 return 0;
945 }
946
947
948 /**
949 * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
950 */
951 static void nes_free_qp_mem(struct nes_device *nesdev,
952 struct nes_qp *nesqp, int virt_wqs)
953 {
954 unsigned long flags;
955 struct nes_adapter *nesadapter = nesdev->nesadapter;
956 if (!virt_wqs) {
957 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
958 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
959 }else {
960 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
961 nesadapter->free_256pbl++;
962 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
963 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
964 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
965 nesqp->pbl_vbase = NULL;
966 if (nesqp->sq_kmapped) {
967 nesqp->sq_kmapped = 0;
968 kunmap(nesqp->page);
969 }
970 }
971 }
972
973
974 /**
975 * nes_create_qp
976 */
977 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
978 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
979 {
980 u64 u64temp= 0;
981 u64 u64nesqp = 0;
982 struct nes_pd *nespd = to_nespd(ibpd);
983 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
984 struct nes_device *nesdev = nesvnic->nesdev;
985 struct nes_adapter *nesadapter = nesdev->nesadapter;
986 struct nes_qp *nesqp;
987 struct nes_cq *nescq;
988 struct nes_ucontext *nes_ucontext;
989 struct nes_hw_cqp_wqe *cqp_wqe;
990 struct nes_cqp_request *cqp_request;
991 struct nes_create_qp_req req;
992 struct nes_create_qp_resp uresp;
993 struct nes_pbl *nespbl = NULL;
994 u32 qp_num = 0;
995 u32 opcode = 0;
996 /* u32 counter = 0; */
997 void *mem;
998 unsigned long flags;
999 int ret;
1000 int err;
1001 int virt_wqs = 0;
1002 int sq_size;
1003 int rq_size;
1004 u8 sq_encoded_size;
1005 u8 rq_encoded_size;
1006 /* int counter; */
1007
1008 if (init_attr->create_flags)
1009 return ERR_PTR(-EINVAL);
1010
1011 atomic_inc(&qps_created);
1012 switch (init_attr->qp_type) {
1013 case IB_QPT_RC:
1014 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1015 init_attr->cap.max_inline_data = 0;
1016 } else {
1017 init_attr->cap.max_inline_data = 64;
1018 }
1019 sq_size = init_attr->cap.max_send_wr;
1020 rq_size = init_attr->cap.max_recv_wr;
1021
1022 /* check if the encoded sizes are OK or not... */
1023 sq_encoded_size = nes_get_encoded_size(&sq_size);
1024 rq_encoded_size = nes_get_encoded_size(&rq_size);
1025
1026 if ((!sq_encoded_size) || (!rq_encoded_size)) {
1027 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1028 rq_size, sq_size);
1029 return ERR_PTR(-EINVAL);
1030 }
1031
1032 init_attr->cap.max_send_wr = sq_size -2;
1033 init_attr->cap.max_recv_wr = rq_size -1;
1034 nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1035
1036 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1037 nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1038 if (ret) {
1039 return ERR_PTR(ret);
1040 }
1041
1042 /* Need 512 (actually now 1024) byte alignment on this structure */
1043 mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1044 if (!mem) {
1045 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1046 return ERR_PTR(-ENOMEM);
1047 }
1048 u64nesqp = (unsigned long)mem;
1049 u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1050 u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1051 u64nesqp &= ~u64temp;
1052 nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1053 /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p. Rounded to closest %u\n",
1054 nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1055 nesqp->allocated_buffer = mem;
1056
1057 if (udata) {
1058 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1059 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1060 kfree(nesqp->allocated_buffer);
1061 nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1062 return ERR_PTR(-EFAULT);
1063 }
1064 if (req.user_wqe_buffers) {
1065 virt_wqs = 1;
1066 }
1067 if (req.user_qp_buffer)
1068 nesqp->nesuqp_addr = req.user_qp_buffer;
1069 if (udata && (ibpd->uobject->context)) {
1070 nesqp->user_mode = 1;
1071 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1072 if (virt_wqs) {
1073 err = 1;
1074 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1075 if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1076 list_del(&nespbl->list);
1077 err = 0;
1078 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1079 nespbl, nespbl->user_base);
1080 break;
1081 }
1082 }
1083 if (err) {
1084 nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1085 (long long unsigned int)req.user_wqe_buffers);
1086 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1087 kfree(nesqp->allocated_buffer);
1088 return ERR_PTR(-EFAULT);
1089 }
1090 }
1091
1092 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1093 nesqp->mmap_sq_db_index =
1094 find_next_zero_bit(nes_ucontext->allocated_wqs,
1095 NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1096 /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1097 nespd->mmap_db_index); */
1098 if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1099 nes_debug(NES_DBG_QP,
1100 "db index > max user regions, failing create QP\n");
1101 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1102 if (virt_wqs) {
1103 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1104 nespbl->pbl_pbase);
1105 kfree(nespbl);
1106 }
1107 kfree(nesqp->allocated_buffer);
1108 return ERR_PTR(-ENOMEM);
1109 }
1110 set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1111 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1112 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1113 } else {
1114 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1115 kfree(nesqp->allocated_buffer);
1116 return ERR_PTR(-EFAULT);
1117 }
1118 }
1119 err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1120 nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1121 if (err) {
1122 nes_debug(NES_DBG_QP,
1123 "error geting qp mem code = %d\n", err);
1124 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1125 kfree(nesqp->allocated_buffer);
1126 return ERR_PTR(-ENOMEM);
1127 }
1128
1129 nesqp->hwqp.sq_size = sq_size;
1130 nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1131 nesqp->hwqp.sq_head = 1;
1132 nesqp->hwqp.rq_size = rq_size;
1133 nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1134 /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1135 (void *)nesqp->nesqp_context_pbase);
1136 */
1137 nesqp->hwqp.qp_id = qp_num;
1138 nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1139 nesqp->nespd = nespd;
1140
1141 nescq = to_nescq(init_attr->send_cq);
1142 nesqp->nesscq = nescq;
1143 nescq = to_nescq(init_attr->recv_cq);
1144 nesqp->nesrcq = nescq;
1145
1146 nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1147 NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1148 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1149 NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1150 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1151 NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1152 if (!udata) {
1153 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1154 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1155 }
1156 nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1157 ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1158 u64temp = (u64)nesqp->hwqp.sq_pbase;
1159 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1160 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1161
1162
1163 if (!virt_wqs) {
1164 u64temp = (u64)nesqp->hwqp.sq_pbase;
1165 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1166 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1167 u64temp = (u64)nesqp->hwqp.rq_pbase;
1168 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1169 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1170 } else {
1171 u64temp = (u64)nesqp->pbl_pbase;
1172 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1173 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1174 }
1175
1176 /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1177 nesvnic->next_qp_nic_index,
1178 nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1179 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1180 nesqp->nesqp_context->misc2 |= cpu_to_le32(
1181 (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1182 NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1183 nesvnic->next_qp_nic_index++;
1184 if ((nesvnic->next_qp_nic_index > 3) ||
1185 (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1186 nesvnic->next_qp_nic_index = 0;
1187 }
1188 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1189
1190 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1191 u64temp = (u64)nesqp->hwqp.q2_pbase;
1192 nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1193 nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1194 nesqp->nesqp_context->aeq_token_low = cpu_to_le32((u32)((unsigned long)(nesqp)));
1195 nesqp->nesqp_context->aeq_token_high = cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1196 nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1197 NES_QPCONTEXT_ORDIRD_AAH |
1198 ((((u32)nesadapter->max_irrq_wr) <<
1199 NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1200 if (disable_mpa_crc) {
1201 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1202 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1203 }
1204
1205
1206 /* Create the QP */
1207 cqp_request = nes_get_cqp_request(nesdev);
1208 if (cqp_request == NULL) {
1209 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1210 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1211 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1212 kfree(nesqp->allocated_buffer);
1213 return ERR_PTR(-ENOMEM);
1214 }
1215 cqp_request->waiting = 1;
1216 cqp_wqe = &cqp_request->cqp_wqe;
1217
1218 if (!virt_wqs) {
1219 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1220 NES_CQP_QP_IWARP_STATE_IDLE;
1221 } else {
1222 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1223 NES_CQP_QP_IWARP_STATE_IDLE;
1224 }
1225 opcode |= NES_CQP_QP_CQS_VALID;
1226 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1227 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1228 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1229
1230 u64temp = (u64)nesqp->nesqp_context_pbase;
1231 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1232
1233 atomic_set(&cqp_request->refcount, 2);
1234 nes_post_cqp_request(nesdev, cqp_request);
1235
1236 /* Wait for CQP */
1237 nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1238 nesqp->hwqp.qp_id);
1239 ret = wait_event_timeout(cqp_request->waitq,
1240 (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1241 nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1242 " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1243 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1244 nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1245 cqp_request->major_code, cqp_request->minor_code);
1246 if ((!ret) || (cqp_request->major_code)) {
1247 nes_put_cqp_request(nesdev, cqp_request);
1248 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1249 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1250 kfree(nesqp->allocated_buffer);
1251 if (!ret) {
1252 return ERR_PTR(-ETIME);
1253 } else {
1254 return ERR_PTR(-EIO);
1255 }
1256 }
1257
1258 nes_put_cqp_request(nesdev, cqp_request);
1259
1260 if (udata) {
1261 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1262 uresp.mmap_rq_db_index = 0;
1263 uresp.actual_sq_size = sq_size;
1264 uresp.actual_rq_size = rq_size;
1265 uresp.qp_id = nesqp->hwqp.qp_id;
1266 uresp.nes_drv_opt = nes_drv_opt;
1267 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1268 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1269 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1270 kfree(nesqp->allocated_buffer);
1271 return ERR_PTR(-EFAULT);
1272 }
1273 }
1274
1275 nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1276 nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1277 spin_lock_init(&nesqp->lock);
1278 nes_add_ref(&nesqp->ibqp);
1279 break;
1280 default:
1281 nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1282 return ERR_PTR(-EINVAL);
1283 }
1284 init_completion(&nesqp->sq_drained);
1285 init_completion(&nesqp->rq_drained);
1286
1287 nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1288 timer_setup(&nesqp->terminate_timer, nes_terminate_timeout, 0);
1289
1290 /* update the QP table */
1291 nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1292 nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1293 netdev_refcnt_read(nesvnic->netdev));
1294
1295 return &nesqp->ibqp;
1296 }
1297
1298 /**
1299 * nes_clean_cq
1300 */
1301 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1302 {
1303 u32 cq_head;
1304 u32 lo;
1305 u32 hi;
1306 u64 u64temp;
1307 unsigned long flags = 0;
1308
1309 spin_lock_irqsave(&nescq->lock, flags);
1310
1311 cq_head = nescq->hw_cq.cq_head;
1312 while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1313 rmb();
1314 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1315 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1316 u64temp = (((u64)hi) << 32) | ((u64)lo);
1317 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1318 if (u64temp == (u64)(unsigned long)nesqp) {
1319 /* Zero the context value so cqe will be ignored */
1320 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1321 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1322 }
1323
1324 if (++cq_head >= nescq->hw_cq.cq_size)
1325 cq_head = 0;
1326 }
1327
1328 spin_unlock_irqrestore(&nescq->lock, flags);
1329 }
1330
1331
1332 /**
1333 * nes_destroy_qp
1334 */
1335 static int nes_destroy_qp(struct ib_qp *ibqp)
1336 {
1337 struct nes_qp *nesqp = to_nesqp(ibqp);
1338 struct nes_ucontext *nes_ucontext;
1339 struct ib_qp_attr attr;
1340 struct iw_cm_id *cm_id;
1341 struct iw_cm_event cm_event;
1342 int ret = 0;
1343
1344 atomic_inc(&sw_qps_destroyed);
1345 nesqp->destroyed = 1;
1346
1347 /* Blow away the connection if it exists. */
1348 if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1349 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1350 attr.qp_state = IB_QPS_ERR;
1351 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1352 }
1353
1354 if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1355 (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1356 cm_id = nesqp->cm_id;
1357 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1358 cm_event.status = -ETIMEDOUT;
1359 cm_event.local_addr = cm_id->local_addr;
1360 cm_event.remote_addr = cm_id->remote_addr;
1361 cm_event.private_data = NULL;
1362 cm_event.private_data_len = 0;
1363
1364 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1365 "QP%u. cm_id = %p, refcount = %u. \n",
1366 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1367
1368 cm_id->rem_ref(cm_id);
1369 ret = cm_id->event_handler(cm_id, &cm_event);
1370 if (ret)
1371 nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1372 }
1373
1374 if (nesqp->user_mode) {
1375 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1376 nes_ucontext = to_nesucontext(ibqp->uobject->context);
1377 clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1378 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1379 if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1380 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1381 }
1382 }
1383 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1384 nesqp->sq_kmapped = 0;
1385 kunmap(nesqp->page);
1386 }
1387 } else {
1388 /* Clean any pending completions from the cq(s) */
1389 if (nesqp->nesscq)
1390 nes_clean_cq(nesqp, nesqp->nesscq);
1391
1392 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1393 nes_clean_cq(nesqp, nesqp->nesrcq);
1394 }
1395 nes_rem_ref(&nesqp->ibqp);
1396 return 0;
1397 }
1398
1399
1400 /**
1401 * nes_create_cq
1402 */
1403 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1404 const struct ib_cq_init_attr *attr,
1405 struct ib_ucontext *context,
1406 struct ib_udata *udata)
1407 {
1408 int entries = attr->cqe;
1409 u64 u64temp;
1410 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1411 struct nes_device *nesdev = nesvnic->nesdev;
1412 struct nes_adapter *nesadapter = nesdev->nesadapter;
1413 struct nes_cq *nescq;
1414 struct nes_ucontext *nes_ucontext = NULL;
1415 struct nes_cqp_request *cqp_request;
1416 void *mem = NULL;
1417 struct nes_hw_cqp_wqe *cqp_wqe;
1418 struct nes_pbl *nespbl = NULL;
1419 struct nes_create_cq_req req;
1420 struct nes_create_cq_resp resp;
1421 u32 cq_num = 0;
1422 u32 opcode = 0;
1423 u32 pbl_entries = 1;
1424 int err;
1425 unsigned long flags;
1426 int ret;
1427
1428 if (attr->flags)
1429 return ERR_PTR(-EINVAL);
1430
1431 if (entries > nesadapter->max_cqe)
1432 return ERR_PTR(-EINVAL);
1433
1434 err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1435 nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1436 if (err) {
1437 return ERR_PTR(err);
1438 }
1439
1440 nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1441 if (!nescq) {
1442 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1443 return ERR_PTR(-ENOMEM);
1444 }
1445
1446 nescq->hw_cq.cq_size = max(entries + 1, 5);
1447 nescq->hw_cq.cq_number = cq_num;
1448 nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1449
1450
1451 if (context) {
1452 nes_ucontext = to_nesucontext(context);
1453 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1454 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1455 kfree(nescq);
1456 return ERR_PTR(-EFAULT);
1457 }
1458 nesvnic->mcrq_ucontext = nes_ucontext;
1459 nes_ucontext->mcrqf = req.mcrqf;
1460 if (nes_ucontext->mcrqf) {
1461 if (nes_ucontext->mcrqf & 0x80000000)
1462 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1463 else if (nes_ucontext->mcrqf & 0x40000000)
1464 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1465 else
1466 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1467 nescq->mcrqf = nes_ucontext->mcrqf;
1468 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1469 }
1470 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1471 (unsigned long)req.user_cq_buffer, entries);
1472 err = 1;
1473 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1474 if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1475 list_del(&nespbl->list);
1476 err = 0;
1477 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1478 nespbl);
1479 break;
1480 }
1481 }
1482 if (err) {
1483 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1484 kfree(nescq);
1485 return ERR_PTR(-EFAULT);
1486 }
1487
1488 pbl_entries = nespbl->pbl_size >> 3;
1489 nescq->cq_mem_size = 0;
1490 } else {
1491 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1492 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1493 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1494
1495 /* allocate the physical buffer space */
1496 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1497 &nescq->hw_cq.cq_pbase);
1498 if (!mem) {
1499 printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1500 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1501 kfree(nescq);
1502 return ERR_PTR(-ENOMEM);
1503 }
1504
1505 nescq->hw_cq.cq_vbase = mem;
1506 nescq->hw_cq.cq_head = 0;
1507 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1508 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1509 (u32)nescq->hw_cq.cq_pbase);
1510 }
1511
1512 nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1513 spin_lock_init(&nescq->lock);
1514
1515 /* send CreateCQ request to CQP */
1516 cqp_request = nes_get_cqp_request(nesdev);
1517 if (cqp_request == NULL) {
1518 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1519 if (!context)
1520 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1521 nescq->hw_cq.cq_pbase);
1522 else {
1523 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1524 nespbl->pbl_vbase, nespbl->pbl_pbase);
1525 kfree(nespbl);
1526 }
1527
1528 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1529 kfree(nescq);
1530 return ERR_PTR(-ENOMEM);
1531 }
1532 cqp_request->waiting = 1;
1533 cqp_wqe = &cqp_request->cqp_wqe;
1534
1535 opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1536 NES_CQP_CQ_CHK_OVERFLOW |
1537 NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1538
1539 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1540
1541 if (pbl_entries != 1) {
1542 if (pbl_entries > 32) {
1543 /* use 4k pbl */
1544 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1545 if (nesadapter->free_4kpbl == 0) {
1546 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1547 nes_free_cqp_request(nesdev, cqp_request);
1548 if (!context)
1549 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1550 nescq->hw_cq.cq_pbase);
1551 else {
1552 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1553 nespbl->pbl_vbase, nespbl->pbl_pbase);
1554 kfree(nespbl);
1555 }
1556 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1557 kfree(nescq);
1558 return ERR_PTR(-ENOMEM);
1559 } else {
1560 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1561 nescq->virtual_cq = 2;
1562 nesadapter->free_4kpbl--;
1563 }
1564 } else {
1565 /* use 256 byte pbl */
1566 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1567 if (nesadapter->free_256pbl == 0) {
1568 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1569 nes_free_cqp_request(nesdev, cqp_request);
1570 if (!context)
1571 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1572 nescq->hw_cq.cq_pbase);
1573 else {
1574 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1575 nespbl->pbl_vbase, nespbl->pbl_pbase);
1576 kfree(nespbl);
1577 }
1578 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1579 kfree(nescq);
1580 return ERR_PTR(-ENOMEM);
1581 } else {
1582 opcode |= NES_CQP_CQ_VIRT;
1583 nescq->virtual_cq = 1;
1584 nesadapter->free_256pbl--;
1585 }
1586 }
1587 }
1588
1589 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1590
1591 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1592 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1593 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1594 (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1595
1596 if (context) {
1597 if (pbl_entries != 1)
1598 u64temp = (u64)nespbl->pbl_pbase;
1599 else
1600 u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1601 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1602 nes_ucontext->mmap_db_index[0]);
1603 } else {
1604 u64temp = (u64)nescq->hw_cq.cq_pbase;
1605 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1606 }
1607 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1608 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1609 u64temp = (u64)(unsigned long)&nescq->hw_cq;
1610 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1611 cpu_to_le32((u32)(u64temp >> 1));
1612 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1613 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1614
1615 atomic_set(&cqp_request->refcount, 2);
1616 nes_post_cqp_request(nesdev, cqp_request);
1617
1618 /* Wait for CQP */
1619 nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1620 nescq->hw_cq.cq_number);
1621 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1622 NES_EVENT_TIMEOUT * 2);
1623 nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1624 nescq->hw_cq.cq_number, ret);
1625 if ((!ret) || (cqp_request->major_code)) {
1626 nes_put_cqp_request(nesdev, cqp_request);
1627 if (!context)
1628 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1629 nescq->hw_cq.cq_pbase);
1630 else {
1631 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1632 nespbl->pbl_vbase, nespbl->pbl_pbase);
1633 kfree(nespbl);
1634 }
1635 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1636 kfree(nescq);
1637 return ERR_PTR(-EIO);
1638 }
1639 nes_put_cqp_request(nesdev, cqp_request);
1640
1641 if (context) {
1642 /* free the nespbl */
1643 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1644 nespbl->pbl_pbase);
1645 kfree(nespbl);
1646 resp.cq_id = nescq->hw_cq.cq_number;
1647 resp.cq_size = nescq->hw_cq.cq_size;
1648 resp.mmap_db_index = 0;
1649 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1650 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1651 kfree(nescq);
1652 return ERR_PTR(-EFAULT);
1653 }
1654 }
1655
1656 return &nescq->ibcq;
1657 }
1658
1659
1660 /**
1661 * nes_destroy_cq
1662 */
1663 static int nes_destroy_cq(struct ib_cq *ib_cq)
1664 {
1665 struct nes_cq *nescq;
1666 struct nes_device *nesdev;
1667 struct nes_vnic *nesvnic;
1668 struct nes_adapter *nesadapter;
1669 struct nes_hw_cqp_wqe *cqp_wqe;
1670 struct nes_cqp_request *cqp_request;
1671 unsigned long flags;
1672 u32 opcode = 0;
1673 int ret;
1674
1675 if (ib_cq == NULL)
1676 return 0;
1677
1678 nescq = to_nescq(ib_cq);
1679 nesvnic = to_nesvnic(ib_cq->device);
1680 nesdev = nesvnic->nesdev;
1681 nesadapter = nesdev->nesadapter;
1682
1683 nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1684
1685 /* Send DestroyCQ request to CQP */
1686 cqp_request = nes_get_cqp_request(nesdev);
1687 if (cqp_request == NULL) {
1688 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1689 return -ENOMEM;
1690 }
1691 cqp_request->waiting = 1;
1692 cqp_wqe = &cqp_request->cqp_wqe;
1693 opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1694 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1695 if (nescq->virtual_cq == 1) {
1696 nesadapter->free_256pbl++;
1697 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1698 printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1699 __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1700 }
1701 } else if (nescq->virtual_cq == 2) {
1702 nesadapter->free_4kpbl++;
1703 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1704 printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1705 __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1706 }
1707 opcode |= NES_CQP_CQ_4KB_CHUNK;
1708 }
1709
1710 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1711
1712 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1713 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1714 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1715 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1716 if (!nescq->mcrqf)
1717 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1718
1719 atomic_set(&cqp_request->refcount, 2);
1720 nes_post_cqp_request(nesdev, cqp_request);
1721
1722 /* Wait for CQP */
1723 nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1724 nescq->hw_cq.cq_number);
1725 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1726 NES_EVENT_TIMEOUT);
1727 nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1728 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1729 nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1730 cqp_request->minor_code);
1731 if (!ret) {
1732 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1733 nescq->hw_cq.cq_number);
1734 ret = -ETIME;
1735 } else if (cqp_request->major_code) {
1736 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1737 nescq->hw_cq.cq_number);
1738 ret = -EIO;
1739 } else {
1740 ret = 0;
1741 }
1742 nes_put_cqp_request(nesdev, cqp_request);
1743
1744 if (nescq->cq_mem_size)
1745 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1746 nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1747 kfree(nescq);
1748
1749 return ret;
1750 }
1751
1752 /**
1753 * root_256
1754 */
1755 static u32 root_256(struct nes_device *nesdev,
1756 struct nes_root_vpbl *root_vpbl,
1757 struct nes_root_vpbl *new_root,
1758 u16 pbl_count_4k)
1759 {
1760 u64 leaf_pbl;
1761 int i, j, k;
1762
1763 if (pbl_count_4k == 1) {
1764 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1765 512, &new_root->pbl_pbase);
1766
1767 if (new_root->pbl_vbase == NULL)
1768 return 0;
1769
1770 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1771 for (i = 0; i < 16; i++) {
1772 new_root->pbl_vbase[i].pa_low =
1773 cpu_to_le32((u32)leaf_pbl);
1774 new_root->pbl_vbase[i].pa_high =
1775 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1776 leaf_pbl += 256;
1777 }
1778 } else {
1779 for (i = 3; i >= 0; i--) {
1780 j = i * 16;
1781 root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1782 leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1783 (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1784 << 32);
1785 for (k = 1; k < 16; k++) {
1786 leaf_pbl += 256;
1787 root_vpbl->pbl_vbase[j + k].pa_low =
1788 cpu_to_le32((u32)leaf_pbl);
1789 root_vpbl->pbl_vbase[j + k].pa_high =
1790 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1791 }
1792 }
1793 }
1794
1795 return 1;
1796 }
1797
1798
1799 /**
1800 * nes_reg_mr
1801 */
1802 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1803 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1804 dma_addr_t single_buffer, u16 pbl_count_4k,
1805 u16 residual_page_count_4k, int acc, u64 *iova_start,
1806 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1807 {
1808 struct nes_hw_cqp_wqe *cqp_wqe;
1809 struct nes_cqp_request *cqp_request;
1810 unsigned long flags;
1811 int ret;
1812 struct nes_adapter *nesadapter = nesdev->nesadapter;
1813 uint pg_cnt = 0;
1814 u16 pbl_count_256 = 0;
1815 u16 pbl_count = 0;
1816 u8 use_256_pbls = 0;
1817 u8 use_4k_pbls = 0;
1818 u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1819 struct nes_root_vpbl new_root = { 0, NULL, NULL };
1820 u32 opcode = 0;
1821 u16 major_code;
1822
1823 /* Register the region with the adapter */
1824 cqp_request = nes_get_cqp_request(nesdev);
1825 if (cqp_request == NULL) {
1826 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1827 return -ENOMEM;
1828 }
1829 cqp_request->waiting = 1;
1830 cqp_wqe = &cqp_request->cqp_wqe;
1831
1832 if (pbl_count_4k) {
1833 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1834
1835 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1836 pbl_count_256 = (pg_cnt + 31) / 32;
1837 if (pg_cnt <= 32) {
1838 if (pbl_count_256 <= nesadapter->free_256pbl)
1839 use_256_pbls = 1;
1840 else if (pbl_count_4k <= nesadapter->free_4kpbl)
1841 use_4k_pbls = 1;
1842 } else if (pg_cnt <= 2048) {
1843 if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1844 (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1845 use_4k_pbls = 1;
1846 } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1847 use_256_pbls = 1;
1848 use_two_level = 1;
1849 } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1850 use_4k_pbls = 1;
1851 }
1852 } else {
1853 if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1854 use_4k_pbls = 1;
1855 }
1856
1857 if (use_256_pbls) {
1858 pbl_count = pbl_count_256;
1859 nesadapter->free_256pbl -= pbl_count + use_two_level;
1860 } else if (use_4k_pbls) {
1861 pbl_count = pbl_count_4k;
1862 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1863 } else {
1864 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1865 nes_debug(NES_DBG_MR, "Out of Pbls\n");
1866 nes_free_cqp_request(nesdev, cqp_request);
1867 return -ENOMEM;
1868 }
1869
1870 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1871 }
1872
1873 if (use_256_pbls && use_two_level) {
1874 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1875 if (new_root.pbl_pbase != 0)
1876 root_vpbl = &new_root;
1877 } else {
1878 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1879 nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1880 use_256_pbls = 0;
1881
1882 if (pbl_count_4k == 1)
1883 use_two_level = 0;
1884 pbl_count = pbl_count_4k;
1885
1886 if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1887 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1888 use_4k_pbls = 1;
1889 }
1890 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1891
1892 if (use_4k_pbls == 0)
1893 return -ENOMEM;
1894 }
1895 }
1896
1897 opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1898 NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1899 if (acc & IB_ACCESS_LOCAL_WRITE)
1900 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1901 if (acc & IB_ACCESS_REMOTE_WRITE)
1902 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1903 if (acc & IB_ACCESS_REMOTE_READ)
1904 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1905 if (acc & IB_ACCESS_MW_BIND)
1906 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1907
1908 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1909 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1910 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1911 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1912
1913 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1914 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1915 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1916 cpu_to_le32(nespd->pd_id & 0x00007fff);
1917 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1918
1919 if (pbl_count == 0) {
1920 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1921 } else {
1922 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1923 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1924 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1925
1926 if (use_4k_pbls)
1927 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1928 }
1929 barrier();
1930
1931 atomic_set(&cqp_request->refcount, 2);
1932 nes_post_cqp_request(nesdev, cqp_request);
1933
1934 /* Wait for CQP */
1935 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1936 NES_EVENT_TIMEOUT);
1937 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1938 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1939 stag, ret, cqp_request->major_code, cqp_request->minor_code);
1940 major_code = cqp_request->major_code;
1941 nes_put_cqp_request(nesdev, cqp_request);
1942
1943 if ((!ret || major_code) && pbl_count != 0) {
1944 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1945 if (use_256_pbls)
1946 nesadapter->free_256pbl += pbl_count + use_two_level;
1947 else if (use_4k_pbls)
1948 nesadapter->free_4kpbl += pbl_count + use_two_level;
1949 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1950 }
1951 if (new_root.pbl_pbase)
1952 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1953 new_root.pbl_pbase);
1954
1955 if (!ret)
1956 return -ETIME;
1957 else if (major_code)
1958 return -EIO;
1959
1960 *actual_pbl_cnt = pbl_count + use_two_level;
1961 *used_4k_pbls = use_4k_pbls;
1962 return 0;
1963 }
1964
1965
1966 /**
1967 * nes_reg_phys_mr
1968 */
1969 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
1970 int acc, u64 *iova_start)
1971 {
1972 u64 region_length;
1973 struct nes_pd *nespd = to_nespd(ib_pd);
1974 struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
1975 struct nes_device *nesdev = nesvnic->nesdev;
1976 struct nes_adapter *nesadapter = nesdev->nesadapter;
1977 struct nes_mr *nesmr;
1978 struct ib_mr *ibmr;
1979 struct nes_vpbl vpbl;
1980 struct nes_root_vpbl root_vpbl;
1981 u32 stag;
1982 unsigned long mask;
1983 u32 stag_index = 0;
1984 u32 next_stag_index = 0;
1985 u32 driver_key = 0;
1986 int err = 0;
1987 int ret = 0;
1988 u16 pbl_count = 0;
1989 u8 single_page = 1;
1990 u8 stag_key = 0;
1991
1992 region_length = 0;
1993 vpbl.pbl_vbase = NULL;
1994 root_vpbl.pbl_vbase = NULL;
1995 root_vpbl.pbl_pbase = 0;
1996
1997 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
1998 stag_key = (u8)next_stag_index;
1999
2000 driver_key = 0;
2001
2002 next_stag_index >>= 8;
2003 next_stag_index %= nesadapter->max_mr;
2004
2005 if ((addr ^ *iova_start) & ~PAGE_MASK)
2006 return ERR_PTR(-EINVAL);
2007
2008 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2009 &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2010 if (err) {
2011 return ERR_PTR(err);
2012 }
2013
2014 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2015 if (!nesmr) {
2016 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2017 return ERR_PTR(-ENOMEM);
2018 }
2019
2020 /* Allocate a 4K buffer for the PBL */
2021 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2022 &vpbl.pbl_pbase);
2023 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2024 vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2025 if (!vpbl.pbl_vbase) {
2026 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2027 ibmr = ERR_PTR(-ENOMEM);
2028 kfree(nesmr);
2029 goto reg_phys_err;
2030 }
2031
2032
2033 mask = !size;
2034
2035 if (mask & ~PAGE_MASK) {
2036 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2037 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2038 ibmr = ERR_PTR(-EINVAL);
2039 kfree(nesmr);
2040 goto reg_phys_err;
2041 }
2042
2043 region_length += size;
2044 vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2045 vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2046
2047 stag = stag_index << 8;
2048 stag |= driver_key;
2049 stag += (u32)stag_key;
2050
2051 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2052 " length = 0x%016lX, index = 0x%08X\n",
2053 stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2054
2055 /* Make the leaf PBL the root if only one PBL */
2056 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2057
2058 if (single_page) {
2059 pbl_count = 0;
2060 } else {
2061 pbl_count = 1;
2062 }
2063 ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2064 addr, pbl_count, 1, acc, iova_start,
2065 &nesmr->pbls_used, &nesmr->pbl_4k);
2066
2067 if (ret == 0) {
2068 nesmr->ibmr.rkey = stag;
2069 nesmr->ibmr.lkey = stag;
2070 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2071 ibmr = &nesmr->ibmr;
2072 } else {
2073 kfree(nesmr);
2074 ibmr = ERR_PTR(-ENOMEM);
2075 }
2076
2077 reg_phys_err:
2078 /* single PBL case */
2079 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2080 return ibmr;
2081 }
2082
2083
2084 /**
2085 * nes_get_dma_mr
2086 */
2087 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2088 {
2089 u64 kva = 0;
2090
2091 nes_debug(NES_DBG_MR, "\n");
2092
2093 return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2094 }
2095
2096 /**
2097 * nes_reg_user_mr
2098 */
2099 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2100 u64 virt, int acc, struct ib_udata *udata)
2101 {
2102 u64 iova_start;
2103 __le64 *pbl;
2104 u64 region_length;
2105 dma_addr_t last_dma_addr = 0;
2106 dma_addr_t first_dma_addr = 0;
2107 struct nes_pd *nespd = to_nespd(pd);
2108 struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2109 struct nes_device *nesdev = nesvnic->nesdev;
2110 struct nes_adapter *nesadapter = nesdev->nesadapter;
2111 struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2112 struct scatterlist *sg;
2113 struct nes_ucontext *nes_ucontext;
2114 struct nes_pbl *nespbl;
2115 struct nes_mr *nesmr;
2116 struct ib_umem *region;
2117 struct nes_mem_reg_req req;
2118 struct nes_vpbl vpbl;
2119 struct nes_root_vpbl root_vpbl;
2120 int entry, page_index;
2121 int page_count = 0;
2122 int err, pbl_depth = 0;
2123 int chunk_pages;
2124 int ret;
2125 u32 stag;
2126 u32 stag_index = 0;
2127 u32 next_stag_index;
2128 u32 driver_key;
2129 u32 root_pbl_index = 0;
2130 u32 cur_pbl_index = 0;
2131 u32 skip_pages;
2132 u16 pbl_count;
2133 u8 single_page = 1;
2134 u8 stag_key;
2135 int first_page = 1;
2136
2137 region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2138 if (IS_ERR(region)) {
2139 return (struct ib_mr *)region;
2140 }
2141
2142 nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2143 " offset = %u, page size = %lu.\n",
2144 (unsigned long int)start, (unsigned long int)virt, (u32)length,
2145 ib_umem_offset(region), BIT(region->page_shift));
2146
2147 skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2148
2149 if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2150 ib_umem_release(region);
2151 return ERR_PTR(-EFAULT);
2152 }
2153 nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2154
2155 switch (req.reg_type) {
2156 case IWNES_MEMREG_TYPE_MEM:
2157 pbl_depth = 0;
2158 region_length = 0;
2159 vpbl.pbl_vbase = NULL;
2160 root_vpbl.pbl_vbase = NULL;
2161 root_vpbl.pbl_pbase = 0;
2162
2163 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2164 stag_key = (u8)next_stag_index;
2165
2166 driver_key = next_stag_index & 0x70000000;
2167
2168 next_stag_index >>= 8;
2169 next_stag_index %= nesadapter->max_mr;
2170
2171 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2172 nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2173 if (err) {
2174 ib_umem_release(region);
2175 return ERR_PTR(err);
2176 }
2177
2178 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2179 if (!nesmr) {
2180 ib_umem_release(region);
2181 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2182 return ERR_PTR(-ENOMEM);
2183 }
2184 nesmr->region = region;
2185
2186 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2187 if (sg_dma_address(sg) & ~PAGE_MASK) {
2188 ib_umem_release(region);
2189 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2190 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2191 (unsigned int) sg_dma_address(sg));
2192 ibmr = ERR_PTR(-EINVAL);
2193 kfree(nesmr);
2194 goto reg_user_mr_err;
2195 }
2196
2197 if (!sg_dma_len(sg)) {
2198 ib_umem_release(region);
2199 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2200 stag_index);
2201 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2202 ibmr = ERR_PTR(-EINVAL);
2203 kfree(nesmr);
2204 goto reg_user_mr_err;
2205 }
2206
2207 region_length += sg_dma_len(sg);
2208 chunk_pages = sg_dma_len(sg) >> 12;
2209 region_length -= skip_pages << 12;
2210 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2211 skip_pages = 0;
2212 if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2213 goto enough_pages;
2214 if ((page_count&0x01FF) == 0) {
2215 if (page_count >= 1024 * 512) {
2216 ib_umem_release(region);
2217 nes_free_resource(nesadapter,
2218 nesadapter->allocated_mrs, stag_index);
2219 kfree(nesmr);
2220 ibmr = ERR_PTR(-E2BIG);
2221 goto reg_user_mr_err;
2222 }
2223 if (root_pbl_index == 1) {
2224 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2225 8192, &root_vpbl.pbl_pbase);
2226 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2227 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2228 if (!root_vpbl.pbl_vbase) {
2229 ib_umem_release(region);
2230 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2231 vpbl.pbl_pbase);
2232 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2233 stag_index);
2234 kfree(nesmr);
2235 ibmr = ERR_PTR(-ENOMEM);
2236 goto reg_user_mr_err;
2237 }
2238 root_vpbl.leaf_vpbl = kcalloc(1024,
2239 sizeof(*root_vpbl.leaf_vpbl),
2240 GFP_KERNEL);
2241 if (!root_vpbl.leaf_vpbl) {
2242 ib_umem_release(region);
2243 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2244 root_vpbl.pbl_pbase);
2245 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2246 vpbl.pbl_pbase);
2247 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2248 stag_index);
2249 kfree(nesmr);
2250 ibmr = ERR_PTR(-ENOMEM);
2251 goto reg_user_mr_err;
2252 }
2253 root_vpbl.pbl_vbase[0].pa_low =
2254 cpu_to_le32((u32)vpbl.pbl_pbase);
2255 root_vpbl.pbl_vbase[0].pa_high =
2256 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2257 root_vpbl.leaf_vpbl[0] = vpbl;
2258 }
2259 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2260 &vpbl.pbl_pbase);
2261 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2262 vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2263 if (!vpbl.pbl_vbase) {
2264 ib_umem_release(region);
2265 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2266 ibmr = ERR_PTR(-ENOMEM);
2267 kfree(nesmr);
2268 goto reg_user_mr_err;
2269 }
2270 if (1 <= root_pbl_index) {
2271 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2272 cpu_to_le32((u32)vpbl.pbl_pbase);
2273 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2274 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2275 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2276 }
2277 root_pbl_index++;
2278 cur_pbl_index = 0;
2279 }
2280 if (single_page) {
2281 if (page_count != 0) {
2282 if ((last_dma_addr+4096) !=
2283 (sg_dma_address(sg)+
2284 (page_index*4096)))
2285 single_page = 0;
2286 last_dma_addr = sg_dma_address(sg)+
2287 (page_index*4096);
2288 } else {
2289 first_dma_addr = sg_dma_address(sg)+
2290 (page_index*4096);
2291 last_dma_addr = first_dma_addr;
2292 }
2293 }
2294
2295 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2296 cpu_to_le32((u32)(sg_dma_address(sg)+
2297 (page_index*4096)));
2298 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2299 cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2300 (page_index*4096))) >> 32)));
2301 cur_pbl_index++;
2302 page_count++;
2303 }
2304 }
2305
2306 enough_pages:
2307 nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2308 " stag_key=0x%08x\n",
2309 stag_index, driver_key, stag_key);
2310 stag = stag_index << 8;
2311 stag |= driver_key;
2312 stag += (u32)stag_key;
2313
2314 iova_start = virt;
2315 /* Make the leaf PBL the root if only one PBL */
2316 if (root_pbl_index == 1) {
2317 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2318 }
2319
2320 if (single_page) {
2321 pbl_count = 0;
2322 } else {
2323 pbl_count = root_pbl_index;
2324 first_dma_addr = 0;
2325 }
2326 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2327 " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2328 stag, (unsigned int)iova_start,
2329 (unsigned int)region_length, stag_index,
2330 (unsigned long long)region->length, pbl_count);
2331 ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2332 first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2333 &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2334
2335 nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2336
2337 if (ret == 0) {
2338 nesmr->ibmr.rkey = stag;
2339 nesmr->ibmr.lkey = stag;
2340 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2341 ibmr = &nesmr->ibmr;
2342 } else {
2343 ib_umem_release(region);
2344 kfree(nesmr);
2345 ibmr = ERR_PTR(-ENOMEM);
2346 }
2347
2348 reg_user_mr_err:
2349 /* free the resources */
2350 if (root_pbl_index == 1) {
2351 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2352 vpbl.pbl_pbase);
2353 } else {
2354 for (page_index=0; page_index<root_pbl_index; page_index++) {
2355 pci_free_consistent(nesdev->pcidev, 4096,
2356 root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2357 root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2358 }
2359 kfree(root_vpbl.leaf_vpbl);
2360 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2361 root_vpbl.pbl_pbase);
2362 }
2363
2364 nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2365
2366 return ibmr;
2367 case IWNES_MEMREG_TYPE_QP:
2368 case IWNES_MEMREG_TYPE_CQ:
2369 if (!region->length) {
2370 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2371 ib_umem_release(region);
2372 return ERR_PTR(-EINVAL);
2373 }
2374 nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2375 if (!nespbl) {
2376 ib_umem_release(region);
2377 return ERR_PTR(-ENOMEM);
2378 }
2379 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2380 if (!nesmr) {
2381 ib_umem_release(region);
2382 kfree(nespbl);
2383 return ERR_PTR(-ENOMEM);
2384 }
2385 nesmr->region = region;
2386 nes_ucontext = to_nesucontext(pd->uobject->context);
2387 pbl_depth = region->length >> 12;
2388 pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2389 nespbl->pbl_size = pbl_depth*sizeof(u64);
2390 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2391 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2392 } else {
2393 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2394 }
2395
2396 nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2397 nespbl->pbl_size, pbl_depth);
2398 pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2399 &nespbl->pbl_pbase);
2400 if (!pbl) {
2401 ib_umem_release(region);
2402 kfree(nesmr);
2403 kfree(nespbl);
2404 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2405 return ERR_PTR(-ENOMEM);
2406 }
2407
2408 nespbl->pbl_vbase = (u64 *)pbl;
2409 nespbl->user_base = start;
2410 nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2411 " pbl_vbase=%p user_base=0x%lx\n",
2412 nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2413 (void *) nespbl->pbl_vbase, nespbl->user_base);
2414
2415 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2416 chunk_pages = sg_dma_len(sg) >> 12;
2417 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2418 if (first_page) {
2419 nespbl->page = sg_page(sg);
2420 first_page = 0;
2421 }
2422
2423 for (page_index = 0; page_index < chunk_pages; page_index++) {
2424 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2425 (sg_dma_address(sg)+
2426 (page_index*4096)));
2427 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2428 (sg_dma_address(sg)+
2429 (page_index*4096)))>>32);
2430 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2431 (unsigned long long)*pbl,
2432 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2433 pbl++;
2434 }
2435 }
2436
2437 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2438 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2439 } else {
2440 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2441 }
2442 nesmr->ibmr.rkey = -1;
2443 nesmr->ibmr.lkey = -1;
2444 nesmr->mode = req.reg_type;
2445 return &nesmr->ibmr;
2446 }
2447
2448 ib_umem_release(region);
2449 return ERR_PTR(-ENOSYS);
2450 }
2451
2452
2453 /**
2454 * nes_dereg_mr
2455 */
2456 static int nes_dereg_mr(struct ib_mr *ib_mr)
2457 {
2458 struct nes_mr *nesmr = to_nesmr(ib_mr);
2459 struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2460 struct nes_device *nesdev = nesvnic->nesdev;
2461 struct nes_adapter *nesadapter = nesdev->nesadapter;
2462 struct nes_hw_cqp_wqe *cqp_wqe;
2463 struct nes_cqp_request *cqp_request;
2464 unsigned long flags;
2465 int ret;
2466 u16 major_code;
2467 u16 minor_code;
2468
2469
2470 if (nesmr->pages)
2471 pci_free_consistent(nesdev->pcidev,
2472 nesmr->max_pages * sizeof(u64),
2473 nesmr->pages,
2474 nesmr->paddr);
2475
2476 if (nesmr->region) {
2477 ib_umem_release(nesmr->region);
2478 }
2479 if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2480 kfree(nesmr);
2481 return 0;
2482 }
2483
2484 /* Deallocate the region with the adapter */
2485
2486 cqp_request = nes_get_cqp_request(nesdev);
2487 if (cqp_request == NULL) {
2488 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2489 return -ENOMEM;
2490 }
2491 cqp_request->waiting = 1;
2492 cqp_wqe = &cqp_request->cqp_wqe;
2493
2494 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2495 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2496 NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2497 NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2498 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2499
2500 atomic_set(&cqp_request->refcount, 2);
2501 nes_post_cqp_request(nesdev, cqp_request);
2502
2503 /* Wait for CQP */
2504 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2505 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2506 NES_EVENT_TIMEOUT);
2507 nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2508 " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2509 ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2510
2511 major_code = cqp_request->major_code;
2512 minor_code = cqp_request->minor_code;
2513
2514 nes_put_cqp_request(nesdev, cqp_request);
2515
2516 if (!ret) {
2517 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2518 " ib_mr=%p, rkey = 0x%08X\n",
2519 ib_mr, ib_mr->rkey);
2520 return -ETIME;
2521 } else if (major_code) {
2522 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2523 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2524 major_code, minor_code, ib_mr, ib_mr->rkey);
2525 return -EIO;
2526 }
2527
2528 if (nesmr->pbls_used != 0) {
2529 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2530 if (nesmr->pbl_4k) {
2531 nesadapter->free_4kpbl += nesmr->pbls_used;
2532 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2533 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2534 "exceeded the max(%u)\n",
2535 nesadapter->free_4kpbl,
2536 nesadapter->max_4kpbl);
2537 } else {
2538 nesadapter->free_256pbl += nesmr->pbls_used;
2539 if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2540 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2541 "exceeded the max(%u)\n",
2542 nesadapter->free_256pbl,
2543 nesadapter->max_256pbl);
2544 }
2545 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2546 }
2547 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2548 (ib_mr->rkey & 0x0fffff00) >> 8);
2549
2550 kfree(nesmr);
2551
2552 return 0;
2553 }
2554
2555
2556 /**
2557 * show_rev
2558 */
2559 static ssize_t hw_rev_show(struct device *dev,
2560 struct device_attribute *attr, char *buf)
2561 {
2562 struct nes_ib_device *nesibdev =
2563 container_of(dev, struct nes_ib_device, ibdev.dev);
2564 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2565
2566 nes_debug(NES_DBG_INIT, "\n");
2567 return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2568 }
2569 static DEVICE_ATTR_RO(hw_rev);
2570
2571 /**
2572 * show_hca
2573 */
2574 static ssize_t hca_type_show(struct device *dev,
2575 struct device_attribute *attr, char *buf)
2576 {
2577 nes_debug(NES_DBG_INIT, "\n");
2578 return sprintf(buf, "NES020\n");
2579 }
2580 static DEVICE_ATTR_RO(hca_type);
2581
2582 /**
2583 * show_board
2584 */
2585 static ssize_t board_id_show(struct device *dev,
2586 struct device_attribute *attr, char *buf)
2587 {
2588 nes_debug(NES_DBG_INIT, "\n");
2589 return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2590 }
2591 static DEVICE_ATTR_RO(board_id);
2592
2593 static struct attribute *nes_dev_attributes[] = {
2594 &dev_attr_hw_rev.attr,
2595 &dev_attr_hca_type.attr,
2596 &dev_attr_board_id.attr,
2597 NULL
2598 };
2599
2600 static const struct attribute_group nes_attr_group = {
2601 .attrs = nes_dev_attributes,
2602 };
2603
2604 /**
2605 * nes_query_qp
2606 */
2607 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2608 int attr_mask, struct ib_qp_init_attr *init_attr)
2609 {
2610 struct nes_qp *nesqp = to_nesqp(ibqp);
2611
2612 nes_debug(NES_DBG_QP, "\n");
2613
2614 attr->qp_access_flags = 0;
2615 attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2616 attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2617 attr->cap.max_recv_sge = 1;
2618 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2619 attr->cap.max_inline_data = 0;
2620 else
2621 attr->cap.max_inline_data = 64;
2622
2623 init_attr->event_handler = nesqp->ibqp.event_handler;
2624 init_attr->qp_context = nesqp->ibqp.qp_context;
2625 init_attr->send_cq = nesqp->ibqp.send_cq;
2626 init_attr->recv_cq = nesqp->ibqp.recv_cq;
2627 init_attr->srq = nesqp->ibqp.srq;
2628 init_attr->cap = attr->cap;
2629
2630 return 0;
2631 }
2632
2633
2634 /**
2635 * nes_hw_modify_qp
2636 */
2637 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2638 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2639 {
2640 struct nes_hw_cqp_wqe *cqp_wqe;
2641 /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2642 /* struct iw_cm_event cm_event; */
2643 struct nes_cqp_request *cqp_request;
2644 int ret;
2645 u16 major_code;
2646
2647 nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2648 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2649
2650 cqp_request = nes_get_cqp_request(nesdev);
2651 if (cqp_request == NULL) {
2652 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2653 return -ENOMEM;
2654 }
2655 if (wait_completion) {
2656 cqp_request->waiting = 1;
2657 } else {
2658 cqp_request->waiting = 0;
2659 }
2660 cqp_wqe = &cqp_request->cqp_wqe;
2661
2662 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2663 NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2664 nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2665 next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2666 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2667 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2668 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2669
2670 /* If sending a terminate message, fill in the length (in words) */
2671 if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2672 !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2673 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2674 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2675 }
2676
2677 atomic_set(&cqp_request->refcount, 2);
2678 nes_post_cqp_request(nesdev, cqp_request);
2679
2680 /* Wait for CQP */
2681 if (wait_completion) {
2682 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2683 nesqp->hwqp.qp_id); */
2684 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2685 NES_EVENT_TIMEOUT);
2686 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2687 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2688 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2689 major_code = cqp_request->major_code;
2690 if (major_code) {
2691 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2692 "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2693 nesqp->hwqp.qp_id, cqp_request->major_code,
2694 cqp_request->minor_code, next_iwarp_state);
2695 }
2696
2697 nes_put_cqp_request(nesdev, cqp_request);
2698
2699 if (!ret)
2700 return -ETIME;
2701 else if (major_code)
2702 return -EIO;
2703 else
2704 return 0;
2705 } else {
2706 return 0;
2707 }
2708 }
2709
2710
2711 /**
2712 * nes_modify_qp
2713 */
2714 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2715 int attr_mask, struct ib_udata *udata)
2716 {
2717 struct nes_qp *nesqp = to_nesqp(ibqp);
2718 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2719 struct nes_device *nesdev = nesvnic->nesdev;
2720 /* u32 cqp_head; */
2721 /* u32 counter; */
2722 u32 next_iwarp_state = 0;
2723 int err;
2724 unsigned long qplockflags;
2725 int ret;
2726 u16 original_last_aeq;
2727 u8 issue_modify_qp = 0;
2728 u8 dont_wait = 0;
2729
2730 nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2731 " iwarp_state=0x%X, refcount=%d\n",
2732 nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2733 nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2734
2735 spin_lock_irqsave(&nesqp->lock, qplockflags);
2736
2737 nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2738 " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2739 nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2740 nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2741
2742 if (attr_mask & IB_QP_STATE) {
2743 switch (attr->qp_state) {
2744 case IB_QPS_INIT:
2745 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2746 nesqp->hwqp.qp_id);
2747 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2748 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2749 return -EINVAL;
2750 }
2751 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2752 issue_modify_qp = 1;
2753 break;
2754 case IB_QPS_RTR:
2755 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2756 nesqp->hwqp.qp_id);
2757 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2758 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2759 return -EINVAL;
2760 }
2761 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2762 issue_modify_qp = 1;
2763 break;
2764 case IB_QPS_RTS:
2765 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2766 nesqp->hwqp.qp_id);
2767 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2768 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2769 return -EINVAL;
2770 }
2771 if (nesqp->cm_id == NULL) {
2772 nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2773 nesqp->hwqp.qp_id );
2774 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2775 return -EINVAL;
2776 }
2777 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2778 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2779 next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2780 NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2781 issue_modify_qp = 1;
2782 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2783 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2784 nesqp->hte_added = 1;
2785 break;
2786 case IB_QPS_SQD:
2787 issue_modify_qp = 1;
2788 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2789 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2790 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2791 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2792 return 0;
2793 } else {
2794 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2795 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2796 " ignored due to current iWARP state\n",
2797 nesqp->hwqp.qp_id);
2798 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2799 return -EINVAL;
2800 }
2801 if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2802 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2803 " already done based on hw state.\n",
2804 nesqp->hwqp.qp_id);
2805 issue_modify_qp = 0;
2806 }
2807 switch (nesqp->hw_iwarp_state) {
2808 case NES_AEQE_IWARP_STATE_CLOSING:
2809 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2810 break;
2811 case NES_AEQE_IWARP_STATE_TERMINATE:
2812 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2813 break;
2814 case NES_AEQE_IWARP_STATE_ERROR:
2815 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2816 break;
2817 default:
2818 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2819 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2820 break;
2821 }
2822 }
2823 break;
2824 case IB_QPS_SQE:
2825 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2826 nesqp->hwqp.qp_id);
2827 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2828 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2829 return -EINVAL;
2830 }
2831 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2832 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2833 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2834 issue_modify_qp = 1;
2835 break;
2836 case IB_QPS_ERR:
2837 case IB_QPS_RESET:
2838 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2839 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2840 return -EINVAL;
2841 }
2842 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2843 nesqp->hwqp.qp_id);
2844 if (nesqp->term_flags)
2845 del_timer(&nesqp->terminate_timer);
2846
2847 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2848 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2849 if (nesqp->hte_added) {
2850 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2851 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2852 nesqp->hte_added = 0;
2853 }
2854 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2855 (nesdev->iw_status) &&
2856 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2857 next_iwarp_state |= NES_CQP_QP_RESET;
2858 } else {
2859 nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2860 nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2861 dont_wait = 1;
2862 }
2863 issue_modify_qp = 1;
2864 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2865 break;
2866 default:
2867 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2868 return -EINVAL;
2869 break;
2870 }
2871
2872 nesqp->ibqp_state = attr->qp_state;
2873 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2874 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2875 nesqp->iwarp_state);
2876 }
2877
2878 if (attr_mask & IB_QP_ACCESS_FLAGS) {
2879 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2880 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2881 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2882 issue_modify_qp = 1;
2883 }
2884 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2885 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2886 issue_modify_qp = 1;
2887 }
2888 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2889 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2890 issue_modify_qp = 1;
2891 }
2892 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2893 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2894 issue_modify_qp = 1;
2895 }
2896
2897 if (nesqp->user_mode) {
2898 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2899 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2900 issue_modify_qp = 1;
2901 }
2902 }
2903
2904 original_last_aeq = nesqp->last_aeq;
2905 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2906
2907 nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2908
2909 ret = 0;
2910
2911
2912 if (issue_modify_qp) {
2913 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2914 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2915 if (ret)
2916 nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2917 " failed for QP%u.\n",
2918 next_iwarp_state, nesqp->hwqp.qp_id);
2919
2920 }
2921
2922 if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2923 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2924 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2925 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2926 original_last_aeq, nesqp->last_aeq);
2927 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2928 if (dont_wait) {
2929 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2930 nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2931 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2932 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2933 original_last_aeq, nesqp->last_aeq);
2934 /* this one is for the cm_disconnect thread */
2935 spin_lock_irqsave(&nesqp->lock, qplockflags);
2936 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2937 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2938 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2939 nes_cm_disconn(nesqp);
2940 } else {
2941 nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2942 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2943 }
2944 } else {
2945 spin_lock_irqsave(&nesqp->lock, qplockflags);
2946 if (nesqp->cm_id) {
2947 /* These two are for the timer thread */
2948 if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
2949 nesqp->cm_id->add_ref(nesqp->cm_id);
2950 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2951 " need ae to finish up, original_last_aeq = 0x%04X."
2952 " last_aeq = 0x%04X, scheduling timer.\n",
2953 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2954 original_last_aeq, nesqp->last_aeq);
2955 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
2956 }
2957 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2958 } else {
2959 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2960 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2961 " need ae to finish up, original_last_aeq = 0x%04X."
2962 " last_aeq = 0x%04X.\n",
2963 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2964 original_last_aeq, nesqp->last_aeq);
2965 }
2966 }
2967 } else {
2968 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2969 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2970 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2971 original_last_aeq, nesqp->last_aeq);
2972 }
2973 } else {
2974 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2975 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2976 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2977 original_last_aeq, nesqp->last_aeq);
2978 }
2979
2980 err = 0;
2981
2982 nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
2983 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2984
2985 return err;
2986 }
2987
2988 static inline void
2989 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, const struct ib_send_wr *ib_wr,
2990 u32 uselkey)
2991 {
2992 int sge_index;
2993 int total_payload_length = 0;
2994 for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
2995 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
2996 ib_wr->sg_list[sge_index].addr);
2997 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
2998 ib_wr->sg_list[sge_index].length);
2999 if (uselkey)
3000 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3001 (ib_wr->sg_list[sge_index].lkey));
3002 else
3003 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3004
3005 total_payload_length += ib_wr->sg_list[sge_index].length;
3006 }
3007 nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3008 total_payload_length);
3009 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3010 total_payload_length);
3011 }
3012
3013 /**
3014 * nes_post_send
3015 */
3016 static int nes_post_send(struct ib_qp *ibqp, const struct ib_send_wr *ib_wr,
3017 const struct ib_send_wr **bad_wr)
3018 {
3019 u64 u64temp;
3020 unsigned long flags = 0;
3021 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3022 struct nes_device *nesdev = nesvnic->nesdev;
3023 struct nes_qp *nesqp = to_nesqp(ibqp);
3024 struct nes_hw_qp_wqe *wqe;
3025 int err = 0;
3026 u32 qsize = nesqp->hwqp.sq_size;
3027 u32 head;
3028 u32 wqe_misc = 0;
3029 u32 wqe_count = 0;
3030 u32 counter;
3031
3032 if (nesqp->ibqp_state > IB_QPS_RTS) {
3033 err = -EINVAL;
3034 goto out;
3035 }
3036
3037 spin_lock_irqsave(&nesqp->lock, flags);
3038
3039 head = nesqp->hwqp.sq_head;
3040
3041 while (ib_wr) {
3042 /* Check for QP error */
3043 if (nesqp->term_flags) {
3044 err = -EINVAL;
3045 break;
3046 }
3047
3048 /* Check for SQ overflow */
3049 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3050 err = -ENOMEM;
3051 break;
3052 }
3053
3054 wqe = &nesqp->hwqp.sq_vbase[head];
3055 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3056 nesqp->hwqp.qp_id, wqe, head); */
3057 nes_fill_init_qp_wqe(wqe, nesqp, head);
3058 u64temp = (u64)(ib_wr->wr_id);
3059 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3060 u64temp);
3061 switch (ib_wr->opcode) {
3062 case IB_WR_SEND:
3063 case IB_WR_SEND_WITH_INV:
3064 if (IB_WR_SEND == ib_wr->opcode) {
3065 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3066 wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3067 else
3068 wqe_misc = NES_IWARP_SQ_OP_SEND;
3069 } else {
3070 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3071 wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3072 else
3073 wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3074
3075 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3076 ib_wr->ex.invalidate_rkey);
3077 }
3078
3079 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3080 err = -EINVAL;
3081 break;
3082 }
3083
3084 if (ib_wr->send_flags & IB_SEND_FENCE)
3085 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3086
3087 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3088 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3089 (ib_wr->sg_list[0].length <= 64)) {
3090 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3091 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3092 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3093 ib_wr->sg_list[0].length);
3094 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3095 } else {
3096 fill_wqe_sg_send(wqe, ib_wr, 1);
3097 }
3098
3099 break;
3100 case IB_WR_RDMA_WRITE:
3101 wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3102 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3103 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3104 ib_wr->num_sge, nesdev->nesadapter->max_sge);
3105 err = -EINVAL;
3106 break;
3107 }
3108
3109 if (ib_wr->send_flags & IB_SEND_FENCE)
3110 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3111
3112 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3113 rdma_wr(ib_wr)->rkey);
3114 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3115 rdma_wr(ib_wr)->remote_addr);
3116
3117 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3118 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3119 (ib_wr->sg_list[0].length <= 64)) {
3120 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3121 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3122 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3123 ib_wr->sg_list[0].length);
3124 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3125 } else {
3126 fill_wqe_sg_send(wqe, ib_wr, 1);
3127 }
3128
3129 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3130 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3131 break;
3132 case IB_WR_RDMA_READ:
3133 case IB_WR_RDMA_READ_WITH_INV:
3134 /* iWARP only supports 1 sge for RDMA reads */
3135 if (ib_wr->num_sge > 1) {
3136 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3137 ib_wr->num_sge);
3138 err = -EINVAL;
3139 break;
3140 }
3141 if (ib_wr->opcode == IB_WR_RDMA_READ) {
3142 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3143 } else {
3144 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
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 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3150 rdma_wr(ib_wr)->remote_addr);
3151 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3152 rdma_wr(ib_wr)->rkey);
3153 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3154 ib_wr->sg_list->length);
3155 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3156 ib_wr->sg_list->addr);
3157 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3158 ib_wr->sg_list->lkey);
3159 break;
3160 case IB_WR_LOCAL_INV:
3161 wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3162 set_wqe_32bit_value(wqe->wqe_words,
3163 NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3164 ib_wr->ex.invalidate_rkey);
3165 break;
3166 case IB_WR_REG_MR:
3167 {
3168 struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3169 int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3170 int flags = reg_wr(ib_wr)->access;
3171
3172 if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3173 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3174 err = -EINVAL;
3175 break;
3176 }
3177 wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3178 set_wqe_64bit_value(wqe->wqe_words,
3179 NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3180 mr->ibmr.iova);
3181 set_wqe_32bit_value(wqe->wqe_words,
3182 NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3183 lower_32_bits(mr->ibmr.length));
3184 set_wqe_32bit_value(wqe->wqe_words,
3185 NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3186 set_wqe_32bit_value(wqe->wqe_words,
3187 NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3188 reg_wr(ib_wr)->key);
3189
3190 if (page_shift == 12) {
3191 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3192 } else if (page_shift == 21) {
3193 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3194 } else {
3195 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3196 " ib_wr=%u, max=1\n", ib_wr->num_sge);
3197 err = -EINVAL;
3198 break;
3199 }
3200
3201 /* Set access_flags */
3202 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3203 if (flags & IB_ACCESS_LOCAL_WRITE)
3204 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3205
3206 if (flags & IB_ACCESS_REMOTE_WRITE)
3207 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3208
3209 if (flags & IB_ACCESS_REMOTE_READ)
3210 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3211
3212 if (flags & IB_ACCESS_MW_BIND)
3213 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3214
3215 /* Fill in PBL info: */
3216 set_wqe_64bit_value(wqe->wqe_words,
3217 NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3218 mr->paddr);
3219
3220 set_wqe_32bit_value(wqe->wqe_words,
3221 NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3222 mr->npages * 8);
3223
3224 nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3225 "length: %lld, rkey: %0x, pgl_paddr: %llx, "
3226 "page_list_len: %u, wqe_misc: %x\n",
3227 (unsigned long long) mr->ibmr.iova,
3228 mr->ibmr.length,
3229 reg_wr(ib_wr)->key,
3230 (unsigned long long) mr->paddr,
3231 mr->npages,
3232 wqe_misc);
3233 break;
3234 }
3235 default:
3236 /* error */
3237 err = -EINVAL;
3238 break;
3239 }
3240
3241 if (err)
3242 break;
3243
3244 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3245 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3246
3247 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3248
3249 ib_wr = ib_wr->next;
3250 head++;
3251 wqe_count++;
3252 if (head >= qsize)
3253 head = 0;
3254
3255 }
3256
3257 nesqp->hwqp.sq_head = head;
3258 barrier();
3259 while (wqe_count) {
3260 counter = min(wqe_count, ((u32)255));
3261 wqe_count -= counter;
3262 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3263 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3264 }
3265
3266 spin_unlock_irqrestore(&nesqp->lock, flags);
3267
3268 out:
3269 if (err)
3270 *bad_wr = ib_wr;
3271 return err;
3272 }
3273
3274
3275 /**
3276 * nes_post_recv
3277 */
3278 static int nes_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *ib_wr,
3279 const struct ib_recv_wr **bad_wr)
3280 {
3281 u64 u64temp;
3282 unsigned long flags = 0;
3283 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3284 struct nes_device *nesdev = nesvnic->nesdev;
3285 struct nes_qp *nesqp = to_nesqp(ibqp);
3286 struct nes_hw_qp_wqe *wqe;
3287 int err = 0;
3288 int sge_index;
3289 u32 qsize = nesqp->hwqp.rq_size;
3290 u32 head;
3291 u32 wqe_count = 0;
3292 u32 counter;
3293 u32 total_payload_length;
3294
3295 if (nesqp->ibqp_state > IB_QPS_RTS) {
3296 err = -EINVAL;
3297 goto out;
3298 }
3299
3300 spin_lock_irqsave(&nesqp->lock, flags);
3301
3302 head = nesqp->hwqp.rq_head;
3303
3304 while (ib_wr) {
3305 /* Check for QP error */
3306 if (nesqp->term_flags) {
3307 err = -EINVAL;
3308 break;
3309 }
3310
3311 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3312 err = -EINVAL;
3313 break;
3314 }
3315 /* Check for RQ overflow */
3316 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3317 err = -ENOMEM;
3318 break;
3319 }
3320
3321 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3322 wqe = &nesqp->hwqp.rq_vbase[head];
3323
3324 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3325 nesqp->hwqp.qp_id, wqe, head); */
3326 nes_fill_init_qp_wqe(wqe, nesqp, head);
3327 u64temp = (u64)(ib_wr->wr_id);
3328 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3329 u64temp);
3330 total_payload_length = 0;
3331 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3332 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3333 ib_wr->sg_list[sge_index].addr);
3334 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3335 ib_wr->sg_list[sge_index].length);
3336 set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3337 ib_wr->sg_list[sge_index].lkey);
3338
3339 total_payload_length += ib_wr->sg_list[sge_index].length;
3340 }
3341 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3342 total_payload_length);
3343
3344 ib_wr = ib_wr->next;
3345 head++;
3346 wqe_count++;
3347 if (head >= qsize)
3348 head = 0;
3349 }
3350
3351 nesqp->hwqp.rq_head = head;
3352 barrier();
3353 while (wqe_count) {
3354 counter = min(wqe_count, ((u32)255));
3355 wqe_count -= counter;
3356 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3357 }
3358
3359 spin_unlock_irqrestore(&nesqp->lock, flags);
3360
3361 out:
3362 if (err)
3363 *bad_wr = ib_wr;
3364 return err;
3365 }
3366
3367 /**
3368 * nes_drain_sq - drain sq
3369 * @ibqp: pointer to ibqp
3370 */
3371 static void nes_drain_sq(struct ib_qp *ibqp)
3372 {
3373 struct nes_qp *nesqp = to_nesqp(ibqp);
3374
3375 if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
3376 wait_for_completion(&nesqp->sq_drained);
3377 }
3378
3379 /**
3380 * nes_drain_rq - drain rq
3381 * @ibqp: pointer to ibqp
3382 */
3383 static void nes_drain_rq(struct ib_qp *ibqp)
3384 {
3385 struct nes_qp *nesqp = to_nesqp(ibqp);
3386
3387 if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
3388 wait_for_completion(&nesqp->rq_drained);
3389 }
3390
3391 /**
3392 * nes_poll_cq
3393 */
3394 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3395 {
3396 u64 u64temp;
3397 u64 wrid;
3398 unsigned long flags = 0;
3399 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3400 struct nes_device *nesdev = nesvnic->nesdev;
3401 struct nes_cq *nescq = to_nescq(ibcq);
3402 struct nes_qp *nesqp;
3403 struct nes_hw_cqe cqe;
3404 u32 head;
3405 u32 wq_tail = 0;
3406 u32 cq_size;
3407 u32 cqe_count = 0;
3408 u32 wqe_index;
3409 u32 u32temp;
3410 u32 move_cq_head = 1;
3411 u32 err_code;
3412
3413 nes_debug(NES_DBG_CQ, "\n");
3414
3415 spin_lock_irqsave(&nescq->lock, flags);
3416
3417 head = nescq->hw_cq.cq_head;
3418 cq_size = nescq->hw_cq.cq_size;
3419
3420 while (cqe_count < num_entries) {
3421 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3422 NES_CQE_VALID) == 0)
3423 break;
3424
3425 /*
3426 * Make sure we read CQ entry contents *after*
3427 * we've checked the valid bit.
3428 */
3429 rmb();
3430
3431 cqe = nescq->hw_cq.cq_vbase[head];
3432 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3433 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3434 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3435 /* parse CQE, get completion context from WQE (either rq or sq) */
3436 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3437 ((u64)u32temp);
3438
3439 if (u64temp) {
3440 nesqp = (struct nes_qp *)(unsigned long)u64temp;
3441 memset(entry, 0, sizeof *entry);
3442 if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3443 entry->status = IB_WC_SUCCESS;
3444 } else {
3445 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3446 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3447 entry->status = err_code & 0x0000ffff;
3448
3449 /* The rest of the cqe's will be marked as flushed */
3450 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3451 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3452 NES_IWARP_CQE_MINOR_FLUSH);
3453 } else
3454 entry->status = IB_WC_WR_FLUSH_ERR;
3455 }
3456
3457 entry->qp = &nesqp->ibqp;
3458 entry->src_qp = nesqp->hwqp.qp_id;
3459
3460 if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3461 if (nesqp->skip_lsmm) {
3462 nesqp->skip_lsmm = 0;
3463 nesqp->hwqp.sq_tail++;
3464 }
3465
3466 /* Working on a SQ Completion*/
3467 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3468 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3469 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3470 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3471 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3472 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3473
3474 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3475 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3476 case NES_IWARP_SQ_OP_RDMAW:
3477 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3478 entry->opcode = IB_WC_RDMA_WRITE;
3479 break;
3480 case NES_IWARP_SQ_OP_RDMAR:
3481 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3482 entry->opcode = IB_WC_RDMA_READ;
3483 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3484 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3485 break;
3486 case NES_IWARP_SQ_OP_SENDINV:
3487 case NES_IWARP_SQ_OP_SENDSEINV:
3488 case NES_IWARP_SQ_OP_SEND:
3489 case NES_IWARP_SQ_OP_SENDSE:
3490 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3491 entry->opcode = IB_WC_SEND;
3492 break;
3493 case NES_IWARP_SQ_OP_LOCINV:
3494 entry->opcode = IB_WC_LOCAL_INV;
3495 break;
3496 case NES_IWARP_SQ_OP_FAST_REG:
3497 entry->opcode = IB_WC_REG_MR;
3498 break;
3499 }
3500
3501 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3502 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3503 move_cq_head = 0;
3504 wq_tail = nesqp->hwqp.sq_tail;
3505 }
3506 } else {
3507 /* Working on a RQ Completion*/
3508 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3509 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3510 ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3511 entry->opcode = IB_WC_RECV;
3512
3513 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3514 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3515 move_cq_head = 0;
3516 wq_tail = nesqp->hwqp.rq_tail;
3517 }
3518 }
3519
3520 if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
3521 if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
3522 complete(&nesqp->sq_drained);
3523 if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
3524 complete(&nesqp->rq_drained);
3525 }
3526
3527 entry->wr_id = wrid;
3528 entry++;
3529 cqe_count++;
3530 }
3531
3532 if (move_cq_head) {
3533 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3534 if (++head >= cq_size)
3535 head = 0;
3536 nescq->polled_completions++;
3537
3538 if ((nescq->polled_completions > (cq_size / 2)) ||
3539 (nescq->polled_completions == 255)) {
3540 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3541 " are pending %u of %u.\n",
3542 nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3543 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3544 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3545 nescq->polled_completions = 0;
3546 }
3547 } else {
3548 /* Update the wqe index and set status to flush */
3549 wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3550 wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3551 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3552 cpu_to_le32(wqe_index);
3553 move_cq_head = 1; /* ready for next pass */
3554 }
3555 }
3556
3557 if (nescq->polled_completions) {
3558 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3559 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3560 nescq->polled_completions = 0;
3561 }
3562
3563 nescq->hw_cq.cq_head = head;
3564 nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3565 cqe_count, nescq->hw_cq.cq_number);
3566
3567 spin_unlock_irqrestore(&nescq->lock, flags);
3568
3569 return cqe_count;
3570 }
3571
3572
3573 /**
3574 * nes_req_notify_cq
3575 */
3576 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3577 {
3578 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3579 struct nes_device *nesdev = nesvnic->nesdev;
3580 struct nes_cq *nescq = to_nescq(ibcq);
3581 u32 cq_arm;
3582
3583 nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3584 nescq->hw_cq.cq_number);
3585
3586 cq_arm = nescq->hw_cq.cq_number;
3587 if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3588 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3589 else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3590 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3591 else
3592 return -EINVAL;
3593
3594 nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3595 nes_read32(nesdev->regs+NES_CQE_ALLOC);
3596
3597 return 0;
3598 }
3599
3600 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3601 struct ib_port_immutable *immutable)
3602 {
3603 struct ib_port_attr attr;
3604 int err;
3605
3606 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3607
3608 err = nes_query_port(ibdev, port_num, &attr);
3609 if (err)
3610 return err;
3611
3612 immutable->pkey_tbl_len = attr.pkey_tbl_len;
3613 immutable->gid_tbl_len = attr.gid_tbl_len;
3614
3615 return 0;
3616 }
3617
3618 static void get_dev_fw_str(struct ib_device *dev, char *str)
3619 {
3620 struct nes_ib_device *nesibdev =
3621 container_of(dev, struct nes_ib_device, ibdev);
3622 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3623
3624 nes_debug(NES_DBG_INIT, "\n");
3625 snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u",
3626 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
3627 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
3628 }
3629
3630 static const struct ib_device_ops nes_dev_ops = {
3631 .alloc_mr = nes_alloc_mr,
3632 .alloc_mw = nes_alloc_mw,
3633 .alloc_pd = nes_alloc_pd,
3634 .alloc_ucontext = nes_alloc_ucontext,
3635 .create_cq = nes_create_cq,
3636 .create_qp = nes_create_qp,
3637 .dealloc_mw = nes_dealloc_mw,
3638 .dealloc_pd = nes_dealloc_pd,
3639 .dealloc_ucontext = nes_dealloc_ucontext,
3640 .dereg_mr = nes_dereg_mr,
3641 .destroy_cq = nes_destroy_cq,
3642 .destroy_qp = nes_destroy_qp,
3643 .drain_rq = nes_drain_rq,
3644 .drain_sq = nes_drain_sq,
3645 .get_dev_fw_str = get_dev_fw_str,
3646 .get_dma_mr = nes_get_dma_mr,
3647 .get_port_immutable = nes_port_immutable,
3648 .map_mr_sg = nes_map_mr_sg,
3649 .mmap = nes_mmap,
3650 .modify_qp = nes_modify_qp,
3651 .poll_cq = nes_poll_cq,
3652 .post_recv = nes_post_recv,
3653 .post_send = nes_post_send,
3654 .query_device = nes_query_device,
3655 .query_gid = nes_query_gid,
3656 .query_pkey = nes_query_pkey,
3657 .query_port = nes_query_port,
3658 .query_qp = nes_query_qp,
3659 .reg_user_mr = nes_reg_user_mr,
3660 .req_notify_cq = nes_req_notify_cq,
3661 };
3662
3663 /**
3664 * nes_init_ofa_device
3665 */
3666 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3667 {
3668 struct nes_ib_device *nesibdev;
3669 struct nes_vnic *nesvnic = netdev_priv(netdev);
3670 struct nes_device *nesdev = nesvnic->nesdev;
3671
3672 nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3673 if (nesibdev == NULL) {
3674 return NULL;
3675 }
3676 nesibdev->ibdev.owner = THIS_MODULE;
3677
3678 nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3679 memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3680 memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3681
3682 nesibdev->ibdev.uverbs_cmd_mask =
3683 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3684 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3685 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3686 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3687 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3688 (1ull << IB_USER_VERBS_CMD_REG_MR) |
3689 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3690 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3691 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3692 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3693 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3694 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3695 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3696 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3697 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3698 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3699 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3700 (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3701 (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3702 (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3703 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3704 (1ull << IB_USER_VERBS_CMD_POST_SEND);
3705
3706 nesibdev->ibdev.phys_port_cnt = 1;
3707 nesibdev->ibdev.num_comp_vectors = 1;
3708 nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3709
3710 nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3711 if (nesibdev->ibdev.iwcm == NULL) {
3712 ib_dealloc_device(&nesibdev->ibdev);
3713 return NULL;
3714 }
3715 nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3716 nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3717 nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3718 nesibdev->ibdev.iwcm->connect = nes_connect;
3719 nesibdev->ibdev.iwcm->accept = nes_accept;
3720 nesibdev->ibdev.iwcm->reject = nes_reject;
3721 nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3722 nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3723
3724 ib_set_device_ops(&nesibdev->ibdev, &nes_dev_ops);
3725 memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3726 sizeof(nesibdev->ibdev.iwcm->ifname));
3727
3728 return nesibdev;
3729 }
3730
3731
3732 /**
3733 * nes_handle_delayed_event
3734 */
3735 static void nes_handle_delayed_event(struct timer_list *t)
3736 {
3737 struct nes_vnic *nesvnic = from_timer(nesvnic, t, event_timer);
3738
3739 if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3740 struct ib_event event;
3741
3742 event.device = &nesvnic->nesibdev->ibdev;
3743 if (!event.device)
3744 goto stop_timer;
3745 event.event = nesvnic->delayed_event;
3746 event.element.port_num = nesvnic->logical_port + 1;
3747 ib_dispatch_event(&event);
3748 }
3749
3750 stop_timer:
3751 nesvnic->event_timer.function = NULL;
3752 }
3753
3754
3755 void nes_port_ibevent(struct nes_vnic *nesvnic)
3756 {
3757 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3758 struct nes_device *nesdev = nesvnic->nesdev;
3759 struct ib_event event;
3760 event.device = &nesibdev->ibdev;
3761 event.element.port_num = nesvnic->logical_port + 1;
3762 event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3763
3764 if (!nesvnic->event_timer.function) {
3765 ib_dispatch_event(&event);
3766 nesvnic->last_dispatched_event = event.event;
3767 nesvnic->event_timer.function = nes_handle_delayed_event;
3768 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3769 add_timer(&nesvnic->event_timer);
3770 } else {
3771 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3772 }
3773 nesvnic->delayed_event = event.event;
3774 }
3775
3776
3777 /**
3778 * nes_destroy_ofa_device
3779 */
3780 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3781 {
3782 if (nesibdev == NULL)
3783 return;
3784
3785 nes_unregister_ofa_device(nesibdev);
3786
3787 kfree(nesibdev->ibdev.iwcm);
3788 ib_dealloc_device(&nesibdev->ibdev);
3789 }
3790
3791
3792 /**
3793 * nes_register_ofa_device
3794 */
3795 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3796 {
3797 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3798 struct nes_device *nesdev = nesvnic->nesdev;
3799 struct nes_adapter *nesadapter = nesdev->nesadapter;
3800 int ret;
3801
3802 rdma_set_device_sysfs_group(&nesvnic->nesibdev->ibdev, &nes_attr_group);
3803 nesvnic->nesibdev->ibdev.driver_id = RDMA_DRIVER_NES;
3804 ret = ib_register_device(&nesvnic->nesibdev->ibdev, "nes%d", NULL);
3805 if (ret) {
3806 return ret;
3807 }
3808
3809 /* Get the resources allocated to this device */
3810 nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3811 nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3812 nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3813 nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3814
3815 nesvnic->of_device_registered = 1;
3816
3817 return 0;
3818 }
3819
3820
3821 /**
3822 * nes_unregister_ofa_device
3823 */
3824 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3825 {
3826 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3827
3828 if (nesvnic->of_device_registered)
3829 ib_unregister_device(&nesibdev->ibdev);
3830
3831 nesvnic->of_device_registered = 0;
3832 }
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git