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 */
nes_alloc_mw(struct ib_pd * ibpd,enum ib_mw_type type,struct ib_udata * udata)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 */
nes_dealloc_mw(struct ib_mw * ibmw)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 */
alloc_fast_reg_mr(struct nes_device * nesdev,struct nes_pd * nespd,u32 stag,u32 page_count)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 */
nes_alloc_mr(struct ib_pd * ibpd,enum ib_mr_type mr_type,u32 max_num_sg)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
nes_set_page(struct ib_mr * ibmr,u64 addr)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
nes_map_mr_sg(struct ib_mr * ibmr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset)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 */
nes_query_device(struct ib_device * ibdev,struct ib_device_attr * props,struct ib_udata * uhw)418 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
419 struct ib_udata *uhw)
420 {
421 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
422 struct nes_device *nesdev = nesvnic->nesdev;
423 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
424
425 if (uhw->inlen || uhw->outlen)
426 return -EINVAL;
427
428 memset(props, 0, sizeof(*props));
429 memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
430
431 props->fw_ver = nesdev->nesadapter->firmware_version;
432 props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
433 props->vendor_id = nesdev->nesadapter->vendor_id;
434 props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
435 props->hw_ver = nesdev->nesadapter->hw_rev;
436 props->max_mr_size = 0x80000000;
437 props->max_qp = nesibdev->max_qp;
438 props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
439 props->max_sge = nesdev->nesadapter->max_sge;
440 props->max_cq = nesibdev->max_cq;
441 props->max_cqe = nesdev->nesadapter->max_cqe;
442 props->max_mr = nesibdev->max_mr;
443 props->max_mw = nesibdev->max_mr;
444 props->max_pd = nesibdev->max_pd;
445 props->max_sge_rd = 1;
446 switch (nesdev->nesadapter->max_irrq_wr) {
447 case 0:
448 props->max_qp_rd_atom = 2;
449 break;
450 case 1:
451 props->max_qp_rd_atom = 8;
452 break;
453 case 2:
454 props->max_qp_rd_atom = 32;
455 break;
456 case 3:
457 props->max_qp_rd_atom = 64;
458 break;
459 default:
460 props->max_qp_rd_atom = 0;
461 }
462 props->max_qp_init_rd_atom = props->max_qp_rd_atom;
463 props->atomic_cap = IB_ATOMIC_NONE;
464 props->max_map_per_fmr = 1;
465
466 return 0;
467 }
468
469
470 /**
471 * nes_query_port
472 */
nes_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)473 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
474 {
475 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
476 struct net_device *netdev = nesvnic->netdev;
477
478 /* props being zeroed by the caller, avoid zeroing it here */
479
480 props->max_mtu = IB_MTU_4096;
481 props->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
482
483 props->lid = 1;
484 if (netif_queue_stopped(netdev))
485 props->state = IB_PORT_DOWN;
486 else if (nesvnic->linkup)
487 props->state = IB_PORT_ACTIVE;
488 else
489 props->state = IB_PORT_DOWN;
490 props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
491 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
492 props->gid_tbl_len = 1;
493 props->pkey_tbl_len = 1;
494 props->active_width = IB_WIDTH_4X;
495 props->active_speed = IB_SPEED_SDR;
496 props->max_msg_sz = 0x80000000;
497
498 return 0;
499 }
500
501 /**
502 * nes_query_pkey
503 */
nes_query_pkey(struct ib_device * ibdev,u8 port,u16 index,u16 * pkey)504 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
505 {
506 *pkey = 0;
507 return 0;
508 }
509
510
511 /**
512 * nes_query_gid
513 */
nes_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)514 static int nes_query_gid(struct ib_device *ibdev, u8 port,
515 int index, union ib_gid *gid)
516 {
517 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
518
519 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
520 memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
521
522 return 0;
523 }
524
525
526 /**
527 * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
528 * of all objects associated with a particular user-mode client.
529 */
nes_alloc_ucontext(struct ib_device * ibdev,struct ib_udata * udata)530 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
531 struct ib_udata *udata)
532 {
533 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
534 struct nes_device *nesdev = nesvnic->nesdev;
535 struct nes_adapter *nesadapter = nesdev->nesadapter;
536 struct nes_alloc_ucontext_req req;
537 struct nes_alloc_ucontext_resp uresp;
538 struct nes_ucontext *nes_ucontext;
539 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
540
541
542 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
543 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
544 return ERR_PTR(-EINVAL);
545 }
546
547 if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
548 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
549 req.userspace_ver, NES_ABI_USERSPACE_VER);
550 return ERR_PTR(-EINVAL);
551 }
552
553
554 memset(&uresp, 0, sizeof uresp);
555
556 uresp.max_qps = nesibdev->max_qp;
557 uresp.max_pds = nesibdev->max_pd;
558 uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
559 uresp.virtwq = nesadapter->virtwq;
560 uresp.kernel_ver = NES_ABI_KERNEL_VER;
561
562 nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
563 if (!nes_ucontext)
564 return ERR_PTR(-ENOMEM);
565
566 nes_ucontext->nesdev = nesdev;
567 nes_ucontext->mmap_wq_offset = uresp.max_pds;
568 nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
569 ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
570 PAGE_SIZE;
571
572
573 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
574 kfree(nes_ucontext);
575 return ERR_PTR(-EFAULT);
576 }
577
578 INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
579 INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
580 atomic_set(&nes_ucontext->usecnt, 1);
581 return &nes_ucontext->ibucontext;
582 }
583
584
585 /**
586 * nes_dealloc_ucontext
587 */
nes_dealloc_ucontext(struct ib_ucontext * context)588 static int nes_dealloc_ucontext(struct ib_ucontext *context)
589 {
590 /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
591 /* struct nes_device *nesdev = nesvnic->nesdev; */
592 struct nes_ucontext *nes_ucontext = to_nesucontext(context);
593
594 if (!atomic_dec_and_test(&nes_ucontext->usecnt))
595 return 0;
596 kfree(nes_ucontext);
597 return 0;
598 }
599
600
601 /**
602 * nes_mmap
603 */
nes_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)604 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
605 {
606 unsigned long index;
607 struct nes_vnic *nesvnic = to_nesvnic(context->device);
608 struct nes_device *nesdev = nesvnic->nesdev;
609 /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
610 struct nes_ucontext *nes_ucontext;
611 struct nes_qp *nesqp;
612
613 nes_ucontext = to_nesucontext(context);
614
615
616 if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
617 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
618 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
619 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
620 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
621 nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
622 return -EFAULT;
623 }
624 nesqp = nes_ucontext->mmap_nesqp[index];
625 if (nesqp == NULL) {
626 nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
627 return -EFAULT;
628 }
629 if (remap_pfn_range(vma, vma->vm_start,
630 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
631 vma->vm_end - vma->vm_start,
632 vma->vm_page_prot)) {
633 nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
634 return -EAGAIN;
635 }
636 vma->vm_private_data = nesqp;
637 return 0;
638 } else {
639 index = vma->vm_pgoff;
640 if (!test_bit(index, nes_ucontext->allocated_doorbells))
641 return -EFAULT;
642
643 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
644 if (io_remap_pfn_range(vma, vma->vm_start,
645 (nesdev->doorbell_start +
646 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
647 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
648 return -EAGAIN;
649 vma->vm_private_data = nes_ucontext;
650 return 0;
651 }
652
653 return -ENOSYS;
654 }
655
656
657 /**
658 * nes_alloc_pd
659 */
nes_alloc_pd(struct ib_device * ibdev,struct ib_ucontext * context,struct ib_udata * udata)660 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
661 struct ib_ucontext *context, struct ib_udata *udata)
662 {
663 struct nes_pd *nespd;
664 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
665 struct nes_device *nesdev = nesvnic->nesdev;
666 struct nes_adapter *nesadapter = nesdev->nesadapter;
667 struct nes_ucontext *nesucontext;
668 struct nes_alloc_pd_resp uresp;
669 u32 pd_num = 0;
670 int err;
671
672 nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
673 nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
674 netdev_refcnt_read(nesvnic->netdev));
675
676 err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
677 nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
678 if (err) {
679 return ERR_PTR(err);
680 }
681
682 nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
683 if (!nespd) {
684 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
685 return ERR_PTR(-ENOMEM);
686 }
687
688 nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
689 nespd, nesvnic->nesibdev->ibdev.name);
690
691 nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
692
693 if (context) {
694 nesucontext = to_nesucontext(context);
695 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
696 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
697 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
698 nespd->mmap_db_index, nespd->pd_id);
699 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
700 nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
701 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
702 kfree(nespd);
703 return ERR_PTR(-ENOMEM);
704 }
705
706 uresp.pd_id = nespd->pd_id;
707 uresp.mmap_db_index = nespd->mmap_db_index;
708 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
709 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
710 kfree(nespd);
711 return ERR_PTR(-EFAULT);
712 }
713
714 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
715 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
716 nesucontext->first_free_db = nespd->mmap_db_index + 1;
717 }
718
719 nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
720 return &nespd->ibpd;
721 }
722
723
724 /**
725 * nes_dealloc_pd
726 */
nes_dealloc_pd(struct ib_pd * ibpd)727 static int nes_dealloc_pd(struct ib_pd *ibpd)
728 {
729 struct nes_ucontext *nesucontext;
730 struct nes_pd *nespd = to_nespd(ibpd);
731 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
732 struct nes_device *nesdev = nesvnic->nesdev;
733 struct nes_adapter *nesadapter = nesdev->nesadapter;
734
735 if ((ibpd->uobject) && (ibpd->uobject->context)) {
736 nesucontext = to_nesucontext(ibpd->uobject->context);
737 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
738 nespd->mmap_db_index);
739 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
740 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
741 if (nesucontext->first_free_db > nespd->mmap_db_index) {
742 nesucontext->first_free_db = nespd->mmap_db_index;
743 }
744 }
745
746 nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
747 nespd->pd_id, nespd);
748 nes_free_resource(nesadapter, nesadapter->allocated_pds,
749 (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
750 kfree(nespd);
751
752 return 0;
753 }
754
755
756 /**
757 * nes_create_ah
758 */
nes_create_ah(struct ib_pd * pd,struct rdma_ah_attr * ah_attr,struct ib_udata * udata)759 static struct ib_ah *nes_create_ah(struct ib_pd *pd,
760 struct rdma_ah_attr *ah_attr,
761 struct ib_udata *udata)
762 {
763 return ERR_PTR(-ENOSYS);
764 }
765
766
767 /**
768 * nes_destroy_ah
769 */
nes_destroy_ah(struct ib_ah * ah)770 static int nes_destroy_ah(struct ib_ah *ah)
771 {
772 return -ENOSYS;
773 }
774
775
776 /**
777 * nes_get_encoded_size
778 */
nes_get_encoded_size(int * size)779 static inline u8 nes_get_encoded_size(int *size)
780 {
781 u8 encoded_size = 0;
782 if (*size <= 32) {
783 *size = 32;
784 encoded_size = 1;
785 } else if (*size <= 128) {
786 *size = 128;
787 encoded_size = 2;
788 } else if (*size <= 512) {
789 *size = 512;
790 encoded_size = 3;
791 }
792 return (encoded_size);
793 }
794
795
796
797 /**
798 * nes_setup_virt_qp
799 */
nes_setup_virt_qp(struct nes_qp * nesqp,struct nes_pbl * nespbl,struct nes_vnic * nesvnic,int sq_size,int rq_size)800 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
801 struct nes_vnic *nesvnic, int sq_size, int rq_size)
802 {
803 unsigned long flags;
804 void *mem;
805 __le64 *pbl = NULL;
806 __le64 *tpbl;
807 __le64 *pblbuffer;
808 struct nes_device *nesdev = nesvnic->nesdev;
809 struct nes_adapter *nesadapter = nesdev->nesadapter;
810 u32 pbl_entries;
811 u8 rq_pbl_entries;
812 u8 sq_pbl_entries;
813
814 pbl_entries = nespbl->pbl_size >> 3;
815 nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
816 nespbl->pbl_size, pbl_entries,
817 (void *)nespbl->pbl_vbase,
818 (unsigned long) nespbl->pbl_pbase);
819 pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
820 /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
821 /* the first pbl to be fro the rq_vbase... */
822 rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
823 sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
824 nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
825 if (!nespbl->page) {
826 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
827 kfree(nespbl);
828 return -ENOMEM;
829 }
830
831 nesqp->hwqp.sq_vbase = kmap(nespbl->page);
832 nesqp->page = nespbl->page;
833 if (!nesqp->hwqp.sq_vbase) {
834 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
835 kfree(nespbl);
836 return -ENOMEM;
837 }
838
839 /* Now to get to sq.. we need to calculate how many */
840 /* PBL entries were used by the rq.. */
841 pbl += sq_pbl_entries;
842 nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
843 /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
844 /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
845
846 nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
847 nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
848 nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
849 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
850 if (!nesadapter->free_256pbl) {
851 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
852 nespbl->pbl_pbase);
853 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
854 kunmap(nesqp->page);
855 kfree(nespbl);
856 return -ENOMEM;
857 }
858 nesadapter->free_256pbl--;
859 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
860
861 nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
862 pblbuffer = nesqp->pbl_vbase;
863 if (!nesqp->pbl_vbase) {
864 /* memory allocated during nes_reg_user_mr() */
865 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
866 nespbl->pbl_pbase);
867 kfree(nespbl);
868 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
869 nesadapter->free_256pbl++;
870 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
871 kunmap(nesqp->page);
872 return -ENOMEM;
873 }
874 memset(nesqp->pbl_vbase, 0, 256);
875 /* fill in the page address in the pbl buffer.. */
876 tpbl = pblbuffer + 16;
877 pbl = (__le64 *)nespbl->pbl_vbase;
878 while (sq_pbl_entries--)
879 *tpbl++ = *pbl++;
880 tpbl = pblbuffer;
881 while (rq_pbl_entries--)
882 *tpbl++ = *pbl++;
883
884 /* done with memory allocated during nes_reg_user_mr() */
885 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
886 nespbl->pbl_pbase);
887 kfree(nespbl);
888
889 nesqp->qp_mem_size =
890 max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256; /* this is Q2 */
891 /* Round up to a multiple of a page */
892 nesqp->qp_mem_size += PAGE_SIZE - 1;
893 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
894
895 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
896 &nesqp->hwqp.q2_pbase);
897
898 if (!mem) {
899 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
900 nesqp->pbl_vbase = NULL;
901 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
902 nesadapter->free_256pbl++;
903 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
904 kunmap(nesqp->page);
905 return -ENOMEM;
906 }
907 nesqp->sq_kmapped = 1;
908 nesqp->hwqp.q2_vbase = mem;
909 mem += 256;
910 memset(nesqp->hwqp.q2_vbase, 0, 256);
911 nesqp->nesqp_context = mem;
912 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
913 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
914
915 return 0;
916 }
917
918
919 /**
920 * nes_setup_mmap_qp
921 */
nes_setup_mmap_qp(struct nes_qp * nesqp,struct nes_vnic * nesvnic,int sq_size,int rq_size)922 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
923 int sq_size, int rq_size)
924 {
925 void *mem;
926 struct nes_device *nesdev = nesvnic->nesdev;
927
928 nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
929 (sizeof(struct nes_hw_qp_wqe) * rq_size) +
930 max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
931 256; /* this is Q2 */
932 /* Round up to a multiple of a page */
933 nesqp->qp_mem_size += PAGE_SIZE - 1;
934 nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
935
936 mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
937 &nesqp->hwqp.sq_pbase);
938 if (!mem)
939 return -ENOMEM;
940 nes_debug(NES_DBG_QP, "PCI consistent memory for "
941 "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
942 mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
943
944 memset(mem, 0, nesqp->qp_mem_size);
945
946 nesqp->hwqp.sq_vbase = mem;
947 mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
948
949 nesqp->hwqp.rq_vbase = mem;
950 nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
951 sizeof(struct nes_hw_qp_wqe) * sq_size;
952 mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
953
954 nesqp->hwqp.q2_vbase = mem;
955 nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
956 sizeof(struct nes_hw_qp_wqe) * rq_size;
957 mem += 256;
958 memset(nesqp->hwqp.q2_vbase, 0, 256);
959
960 nesqp->nesqp_context = mem;
961 nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
962 memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
963 return 0;
964 }
965
966
967 /**
968 * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
969 */
nes_free_qp_mem(struct nes_device * nesdev,struct nes_qp * nesqp,int virt_wqs)970 static void nes_free_qp_mem(struct nes_device *nesdev,
971 struct nes_qp *nesqp, int virt_wqs)
972 {
973 unsigned long flags;
974 struct nes_adapter *nesadapter = nesdev->nesadapter;
975 if (!virt_wqs) {
976 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
977 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
978 }else {
979 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
980 nesadapter->free_256pbl++;
981 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
982 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
983 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
984 nesqp->pbl_vbase = NULL;
985 if (nesqp->sq_kmapped) {
986 nesqp->sq_kmapped = 0;
987 kunmap(nesqp->page);
988 }
989 }
990 }
991
992
993 /**
994 * nes_create_qp
995 */
nes_create_qp(struct ib_pd * ibpd,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)996 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
997 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
998 {
999 u64 u64temp= 0;
1000 u64 u64nesqp = 0;
1001 struct nes_pd *nespd = to_nespd(ibpd);
1002 struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1003 struct nes_device *nesdev = nesvnic->nesdev;
1004 struct nes_adapter *nesadapter = nesdev->nesadapter;
1005 struct nes_qp *nesqp;
1006 struct nes_cq *nescq;
1007 struct nes_ucontext *nes_ucontext;
1008 struct nes_hw_cqp_wqe *cqp_wqe;
1009 struct nes_cqp_request *cqp_request;
1010 struct nes_create_qp_req req;
1011 struct nes_create_qp_resp uresp;
1012 struct nes_pbl *nespbl = NULL;
1013 u32 qp_num = 0;
1014 u32 opcode = 0;
1015 /* u32 counter = 0; */
1016 void *mem;
1017 unsigned long flags;
1018 int ret;
1019 int err;
1020 int virt_wqs = 0;
1021 int sq_size;
1022 int rq_size;
1023 u8 sq_encoded_size;
1024 u8 rq_encoded_size;
1025 /* int counter; */
1026
1027 if (init_attr->create_flags)
1028 return ERR_PTR(-EINVAL);
1029
1030 atomic_inc(&qps_created);
1031 switch (init_attr->qp_type) {
1032 case IB_QPT_RC:
1033 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1034 init_attr->cap.max_inline_data = 0;
1035 } else {
1036 init_attr->cap.max_inline_data = 64;
1037 }
1038 sq_size = init_attr->cap.max_send_wr;
1039 rq_size = init_attr->cap.max_recv_wr;
1040
1041 /* check if the encoded sizes are OK or not... */
1042 sq_encoded_size = nes_get_encoded_size(&sq_size);
1043 rq_encoded_size = nes_get_encoded_size(&rq_size);
1044
1045 if ((!sq_encoded_size) || (!rq_encoded_size)) {
1046 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1047 rq_size, sq_size);
1048 return ERR_PTR(-EINVAL);
1049 }
1050
1051 init_attr->cap.max_send_wr = sq_size -2;
1052 init_attr->cap.max_recv_wr = rq_size -1;
1053 nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1054
1055 ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1056 nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1057 if (ret) {
1058 return ERR_PTR(ret);
1059 }
1060
1061 /* Need 512 (actually now 1024) byte alignment on this structure */
1062 mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1063 if (!mem) {
1064 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1065 return ERR_PTR(-ENOMEM);
1066 }
1067 u64nesqp = (unsigned long)mem;
1068 u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1069 u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1070 u64nesqp &= ~u64temp;
1071 nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1072 /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p. Rounded to closest %u\n",
1073 nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1074 nesqp->allocated_buffer = mem;
1075
1076 if (udata) {
1077 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1078 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1079 kfree(nesqp->allocated_buffer);
1080 nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1081 return ERR_PTR(-EFAULT);
1082 }
1083 if (req.user_wqe_buffers) {
1084 virt_wqs = 1;
1085 }
1086 if (req.user_qp_buffer)
1087 nesqp->nesuqp_addr = req.user_qp_buffer;
1088 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1089 nesqp->user_mode = 1;
1090 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1091 if (virt_wqs) {
1092 err = 1;
1093 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1094 if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1095 list_del(&nespbl->list);
1096 err = 0;
1097 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1098 nespbl, nespbl->user_base);
1099 break;
1100 }
1101 }
1102 if (err) {
1103 nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1104 (long long unsigned int)req.user_wqe_buffers);
1105 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1106 kfree(nesqp->allocated_buffer);
1107 return ERR_PTR(-EFAULT);
1108 }
1109 }
1110
1111 nes_ucontext = to_nesucontext(ibpd->uobject->context);
1112 nesqp->mmap_sq_db_index =
1113 find_next_zero_bit(nes_ucontext->allocated_wqs,
1114 NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1115 /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1116 nespd->mmap_db_index); */
1117 if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1118 nes_debug(NES_DBG_QP,
1119 "db index > max user regions, failing create QP\n");
1120 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1121 if (virt_wqs) {
1122 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1123 nespbl->pbl_pbase);
1124 kfree(nespbl);
1125 }
1126 kfree(nesqp->allocated_buffer);
1127 return ERR_PTR(-ENOMEM);
1128 }
1129 set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1130 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1131 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1132 } else {
1133 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1134 kfree(nesqp->allocated_buffer);
1135 return ERR_PTR(-EFAULT);
1136 }
1137 }
1138 err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1139 nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1140 if (err) {
1141 nes_debug(NES_DBG_QP,
1142 "error geting qp mem code = %d\n", err);
1143 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1144 kfree(nesqp->allocated_buffer);
1145 return ERR_PTR(-ENOMEM);
1146 }
1147
1148 nesqp->hwqp.sq_size = sq_size;
1149 nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1150 nesqp->hwqp.sq_head = 1;
1151 nesqp->hwqp.rq_size = rq_size;
1152 nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1153 /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1154 (void *)nesqp->nesqp_context_pbase);
1155 */
1156 nesqp->hwqp.qp_id = qp_num;
1157 nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1158 nesqp->nespd = nespd;
1159
1160 nescq = to_nescq(init_attr->send_cq);
1161 nesqp->nesscq = nescq;
1162 nescq = to_nescq(init_attr->recv_cq);
1163 nesqp->nesrcq = nescq;
1164
1165 nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1166 NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1167 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1168 NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1169 nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1170 NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1171 if (!udata) {
1172 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1173 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1174 }
1175 nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1176 ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1177 u64temp = (u64)nesqp->hwqp.sq_pbase;
1178 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1179 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1180
1181
1182 if (!virt_wqs) {
1183 u64temp = (u64)nesqp->hwqp.sq_pbase;
1184 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1185 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1186 u64temp = (u64)nesqp->hwqp.rq_pbase;
1187 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1188 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1189 } else {
1190 u64temp = (u64)nesqp->pbl_pbase;
1191 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1192 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1193 }
1194
1195 /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1196 nesvnic->next_qp_nic_index,
1197 nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1198 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1199 nesqp->nesqp_context->misc2 |= cpu_to_le32(
1200 (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1201 NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1202 nesvnic->next_qp_nic_index++;
1203 if ((nesvnic->next_qp_nic_index > 3) ||
1204 (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1205 nesvnic->next_qp_nic_index = 0;
1206 }
1207 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1208
1209 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1210 u64temp = (u64)nesqp->hwqp.q2_pbase;
1211 nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1212 nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1213 nesqp->nesqp_context->aeq_token_low = cpu_to_le32((u32)((unsigned long)(nesqp)));
1214 nesqp->nesqp_context->aeq_token_high = cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1215 nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1216 NES_QPCONTEXT_ORDIRD_AAH |
1217 ((((u32)nesadapter->max_irrq_wr) <<
1218 NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1219 if (disable_mpa_crc) {
1220 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1221 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1222 }
1223
1224
1225 /* Create the QP */
1226 cqp_request = nes_get_cqp_request(nesdev);
1227 if (cqp_request == NULL) {
1228 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1229 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1230 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1231 kfree(nesqp->allocated_buffer);
1232 return ERR_PTR(-ENOMEM);
1233 }
1234 cqp_request->waiting = 1;
1235 cqp_wqe = &cqp_request->cqp_wqe;
1236
1237 if (!virt_wqs) {
1238 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1239 NES_CQP_QP_IWARP_STATE_IDLE;
1240 } else {
1241 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1242 NES_CQP_QP_IWARP_STATE_IDLE;
1243 }
1244 opcode |= NES_CQP_QP_CQS_VALID;
1245 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1246 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1247 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1248
1249 u64temp = (u64)nesqp->nesqp_context_pbase;
1250 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1251
1252 atomic_set(&cqp_request->refcount, 2);
1253 nes_post_cqp_request(nesdev, cqp_request);
1254
1255 /* Wait for CQP */
1256 nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1257 nesqp->hwqp.qp_id);
1258 ret = wait_event_timeout(cqp_request->waitq,
1259 (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1260 nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1261 " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1262 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1263 nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1264 cqp_request->major_code, cqp_request->minor_code);
1265 if ((!ret) || (cqp_request->major_code)) {
1266 nes_put_cqp_request(nesdev, cqp_request);
1267 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1268 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1269 kfree(nesqp->allocated_buffer);
1270 if (!ret) {
1271 return ERR_PTR(-ETIME);
1272 } else {
1273 return ERR_PTR(-EIO);
1274 }
1275 }
1276
1277 nes_put_cqp_request(nesdev, cqp_request);
1278
1279 if (ibpd->uobject) {
1280 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1281 uresp.mmap_rq_db_index = 0;
1282 uresp.actual_sq_size = sq_size;
1283 uresp.actual_rq_size = rq_size;
1284 uresp.qp_id = nesqp->hwqp.qp_id;
1285 uresp.nes_drv_opt = nes_drv_opt;
1286 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1287 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1288 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1289 kfree(nesqp->allocated_buffer);
1290 return ERR_PTR(-EFAULT);
1291 }
1292 }
1293
1294 nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1295 nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1296 spin_lock_init(&nesqp->lock);
1297 nes_add_ref(&nesqp->ibqp);
1298 break;
1299 default:
1300 nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1301 return ERR_PTR(-EINVAL);
1302 }
1303 init_completion(&nesqp->sq_drained);
1304 init_completion(&nesqp->rq_drained);
1305
1306 nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1307 setup_timer(&nesqp->terminate_timer, nes_terminate_timeout,
1308 (unsigned long)nesqp);
1309
1310 /* update the QP table */
1311 nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1312 nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1313 netdev_refcnt_read(nesvnic->netdev));
1314
1315 return &nesqp->ibqp;
1316 }
1317
1318 /**
1319 * nes_clean_cq
1320 */
nes_clean_cq(struct nes_qp * nesqp,struct nes_cq * nescq)1321 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1322 {
1323 u32 cq_head;
1324 u32 lo;
1325 u32 hi;
1326 u64 u64temp;
1327 unsigned long flags = 0;
1328
1329 spin_lock_irqsave(&nescq->lock, flags);
1330
1331 cq_head = nescq->hw_cq.cq_head;
1332 while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1333 rmb();
1334 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1335 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1336 u64temp = (((u64)hi) << 32) | ((u64)lo);
1337 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1338 if (u64temp == (u64)(unsigned long)nesqp) {
1339 /* Zero the context value so cqe will be ignored */
1340 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1341 nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1342 }
1343
1344 if (++cq_head >= nescq->hw_cq.cq_size)
1345 cq_head = 0;
1346 }
1347
1348 spin_unlock_irqrestore(&nescq->lock, flags);
1349 }
1350
1351
1352 /**
1353 * nes_destroy_qp
1354 */
nes_destroy_qp(struct ib_qp * ibqp)1355 static int nes_destroy_qp(struct ib_qp *ibqp)
1356 {
1357 struct nes_qp *nesqp = to_nesqp(ibqp);
1358 struct nes_ucontext *nes_ucontext;
1359 struct ib_qp_attr attr;
1360 struct iw_cm_id *cm_id;
1361 struct iw_cm_event cm_event;
1362 int ret = 0;
1363
1364 atomic_inc(&sw_qps_destroyed);
1365 nesqp->destroyed = 1;
1366
1367 /* Blow away the connection if it exists. */
1368 if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1369 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1370 attr.qp_state = IB_QPS_ERR;
1371 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1372 }
1373
1374 if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1375 (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1376 cm_id = nesqp->cm_id;
1377 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1378 cm_event.status = -ETIMEDOUT;
1379 cm_event.local_addr = cm_id->local_addr;
1380 cm_event.remote_addr = cm_id->remote_addr;
1381 cm_event.private_data = NULL;
1382 cm_event.private_data_len = 0;
1383
1384 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1385 "QP%u. cm_id = %p, refcount = %u. \n",
1386 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1387
1388 cm_id->rem_ref(cm_id);
1389 ret = cm_id->event_handler(cm_id, &cm_event);
1390 if (ret)
1391 nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1392 }
1393
1394 if (nesqp->user_mode) {
1395 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1396 nes_ucontext = to_nesucontext(ibqp->uobject->context);
1397 clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1398 nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1399 if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1400 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1401 }
1402 }
1403 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1404 nesqp->sq_kmapped = 0;
1405 kunmap(nesqp->page);
1406 }
1407 } else {
1408 /* Clean any pending completions from the cq(s) */
1409 if (nesqp->nesscq)
1410 nes_clean_cq(nesqp, nesqp->nesscq);
1411
1412 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1413 nes_clean_cq(nesqp, nesqp->nesrcq);
1414 }
1415 nes_rem_ref(&nesqp->ibqp);
1416 return 0;
1417 }
1418
1419
1420 /**
1421 * nes_create_cq
1422 */
nes_create_cq(struct ib_device * ibdev,const struct ib_cq_init_attr * attr,struct ib_ucontext * context,struct ib_udata * udata)1423 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1424 const struct ib_cq_init_attr *attr,
1425 struct ib_ucontext *context,
1426 struct ib_udata *udata)
1427 {
1428 int entries = attr->cqe;
1429 u64 u64temp;
1430 struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1431 struct nes_device *nesdev = nesvnic->nesdev;
1432 struct nes_adapter *nesadapter = nesdev->nesadapter;
1433 struct nes_cq *nescq;
1434 struct nes_ucontext *nes_ucontext = NULL;
1435 struct nes_cqp_request *cqp_request;
1436 void *mem = NULL;
1437 struct nes_hw_cqp_wqe *cqp_wqe;
1438 struct nes_pbl *nespbl = NULL;
1439 struct nes_create_cq_req req;
1440 struct nes_create_cq_resp resp;
1441 u32 cq_num = 0;
1442 u32 opcode = 0;
1443 u32 pbl_entries = 1;
1444 int err;
1445 unsigned long flags;
1446 int ret;
1447
1448 if (attr->flags)
1449 return ERR_PTR(-EINVAL);
1450
1451 if (entries > nesadapter->max_cqe)
1452 return ERR_PTR(-EINVAL);
1453
1454 err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1455 nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1456 if (err) {
1457 return ERR_PTR(err);
1458 }
1459
1460 nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1461 if (!nescq) {
1462 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1463 return ERR_PTR(-ENOMEM);
1464 }
1465
1466 nescq->hw_cq.cq_size = max(entries + 1, 5);
1467 nescq->hw_cq.cq_number = cq_num;
1468 nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1469
1470
1471 if (context) {
1472 nes_ucontext = to_nesucontext(context);
1473 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1474 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1475 kfree(nescq);
1476 return ERR_PTR(-EFAULT);
1477 }
1478 nesvnic->mcrq_ucontext = nes_ucontext;
1479 nes_ucontext->mcrqf = req.mcrqf;
1480 if (nes_ucontext->mcrqf) {
1481 if (nes_ucontext->mcrqf & 0x80000000)
1482 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1483 else if (nes_ucontext->mcrqf & 0x40000000)
1484 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1485 else
1486 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1487 nescq->mcrqf = nes_ucontext->mcrqf;
1488 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1489 }
1490 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1491 (unsigned long)req.user_cq_buffer, entries);
1492 err = 1;
1493 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1494 if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1495 list_del(&nespbl->list);
1496 err = 0;
1497 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1498 nespbl);
1499 break;
1500 }
1501 }
1502 if (err) {
1503 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1504 kfree(nescq);
1505 return ERR_PTR(-EFAULT);
1506 }
1507
1508 pbl_entries = nespbl->pbl_size >> 3;
1509 nescq->cq_mem_size = 0;
1510 } else {
1511 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1512 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1513 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1514
1515 /* allocate the physical buffer space */
1516 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1517 &nescq->hw_cq.cq_pbase);
1518 if (!mem) {
1519 printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1520 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1521 kfree(nescq);
1522 return ERR_PTR(-ENOMEM);
1523 }
1524
1525 nescq->hw_cq.cq_vbase = mem;
1526 nescq->hw_cq.cq_head = 0;
1527 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1528 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1529 (u32)nescq->hw_cq.cq_pbase);
1530 }
1531
1532 nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1533 spin_lock_init(&nescq->lock);
1534
1535 /* send CreateCQ request to CQP */
1536 cqp_request = nes_get_cqp_request(nesdev);
1537 if (cqp_request == NULL) {
1538 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1539 if (!context)
1540 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1541 nescq->hw_cq.cq_pbase);
1542 else {
1543 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1544 nespbl->pbl_vbase, nespbl->pbl_pbase);
1545 kfree(nespbl);
1546 }
1547
1548 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1549 kfree(nescq);
1550 return ERR_PTR(-ENOMEM);
1551 }
1552 cqp_request->waiting = 1;
1553 cqp_wqe = &cqp_request->cqp_wqe;
1554
1555 opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1556 NES_CQP_CQ_CHK_OVERFLOW |
1557 NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1558
1559 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1560
1561 if (pbl_entries != 1) {
1562 if (pbl_entries > 32) {
1563 /* use 4k pbl */
1564 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1565 if (nesadapter->free_4kpbl == 0) {
1566 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1567 nes_free_cqp_request(nesdev, cqp_request);
1568 if (!context)
1569 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1570 nescq->hw_cq.cq_pbase);
1571 else {
1572 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1573 nespbl->pbl_vbase, nespbl->pbl_pbase);
1574 kfree(nespbl);
1575 }
1576 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1577 kfree(nescq);
1578 return ERR_PTR(-ENOMEM);
1579 } else {
1580 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1581 nescq->virtual_cq = 2;
1582 nesadapter->free_4kpbl--;
1583 }
1584 } else {
1585 /* use 256 byte pbl */
1586 nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1587 if (nesadapter->free_256pbl == 0) {
1588 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1589 nes_free_cqp_request(nesdev, cqp_request);
1590 if (!context)
1591 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1592 nescq->hw_cq.cq_pbase);
1593 else {
1594 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1595 nespbl->pbl_vbase, nespbl->pbl_pbase);
1596 kfree(nespbl);
1597 }
1598 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1599 kfree(nescq);
1600 return ERR_PTR(-ENOMEM);
1601 } else {
1602 opcode |= NES_CQP_CQ_VIRT;
1603 nescq->virtual_cq = 1;
1604 nesadapter->free_256pbl--;
1605 }
1606 }
1607 }
1608
1609 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1610
1611 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1612 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1613 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1614 (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1615
1616 if (context) {
1617 if (pbl_entries != 1)
1618 u64temp = (u64)nespbl->pbl_pbase;
1619 else
1620 u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1621 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1622 nes_ucontext->mmap_db_index[0]);
1623 } else {
1624 u64temp = (u64)nescq->hw_cq.cq_pbase;
1625 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1626 }
1627 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1628 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1629 u64temp = (u64)(unsigned long)&nescq->hw_cq;
1630 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1631 cpu_to_le32((u32)(u64temp >> 1));
1632 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1633 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1634
1635 atomic_set(&cqp_request->refcount, 2);
1636 nes_post_cqp_request(nesdev, cqp_request);
1637
1638 /* Wait for CQP */
1639 nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1640 nescq->hw_cq.cq_number);
1641 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1642 NES_EVENT_TIMEOUT * 2);
1643 nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1644 nescq->hw_cq.cq_number, ret);
1645 if ((!ret) || (cqp_request->major_code)) {
1646 nes_put_cqp_request(nesdev, cqp_request);
1647 if (!context)
1648 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1649 nescq->hw_cq.cq_pbase);
1650 else {
1651 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1652 nespbl->pbl_vbase, nespbl->pbl_pbase);
1653 kfree(nespbl);
1654 }
1655 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1656 kfree(nescq);
1657 return ERR_PTR(-EIO);
1658 }
1659 nes_put_cqp_request(nesdev, cqp_request);
1660
1661 if (context) {
1662 /* free the nespbl */
1663 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1664 nespbl->pbl_pbase);
1665 kfree(nespbl);
1666 resp.cq_id = nescq->hw_cq.cq_number;
1667 resp.cq_size = nescq->hw_cq.cq_size;
1668 resp.mmap_db_index = 0;
1669 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1670 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1671 kfree(nescq);
1672 return ERR_PTR(-EFAULT);
1673 }
1674 }
1675
1676 return &nescq->ibcq;
1677 }
1678
1679
1680 /**
1681 * nes_destroy_cq
1682 */
nes_destroy_cq(struct ib_cq * ib_cq)1683 static int nes_destroy_cq(struct ib_cq *ib_cq)
1684 {
1685 struct nes_cq *nescq;
1686 struct nes_device *nesdev;
1687 struct nes_vnic *nesvnic;
1688 struct nes_adapter *nesadapter;
1689 struct nes_hw_cqp_wqe *cqp_wqe;
1690 struct nes_cqp_request *cqp_request;
1691 unsigned long flags;
1692 u32 opcode = 0;
1693 int ret;
1694
1695 if (ib_cq == NULL)
1696 return 0;
1697
1698 nescq = to_nescq(ib_cq);
1699 nesvnic = to_nesvnic(ib_cq->device);
1700 nesdev = nesvnic->nesdev;
1701 nesadapter = nesdev->nesadapter;
1702
1703 nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1704
1705 /* Send DestroyCQ request to CQP */
1706 cqp_request = nes_get_cqp_request(nesdev);
1707 if (cqp_request == NULL) {
1708 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1709 return -ENOMEM;
1710 }
1711 cqp_request->waiting = 1;
1712 cqp_wqe = &cqp_request->cqp_wqe;
1713 opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1714 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1715 if (nescq->virtual_cq == 1) {
1716 nesadapter->free_256pbl++;
1717 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1718 printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1719 __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1720 }
1721 } else if (nescq->virtual_cq == 2) {
1722 nesadapter->free_4kpbl++;
1723 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1724 printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1725 __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1726 }
1727 opcode |= NES_CQP_CQ_4KB_CHUNK;
1728 }
1729
1730 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1731
1732 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1733 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1734 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1735 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1736 if (!nescq->mcrqf)
1737 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1738
1739 atomic_set(&cqp_request->refcount, 2);
1740 nes_post_cqp_request(nesdev, cqp_request);
1741
1742 /* Wait for CQP */
1743 nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1744 nescq->hw_cq.cq_number);
1745 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1746 NES_EVENT_TIMEOUT);
1747 nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1748 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1749 nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1750 cqp_request->minor_code);
1751 if (!ret) {
1752 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1753 nescq->hw_cq.cq_number);
1754 ret = -ETIME;
1755 } else if (cqp_request->major_code) {
1756 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1757 nescq->hw_cq.cq_number);
1758 ret = -EIO;
1759 } else {
1760 ret = 0;
1761 }
1762 nes_put_cqp_request(nesdev, cqp_request);
1763
1764 if (nescq->cq_mem_size)
1765 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1766 nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1767 kfree(nescq);
1768
1769 return ret;
1770 }
1771
1772 /**
1773 * root_256
1774 */
root_256(struct nes_device * nesdev,struct nes_root_vpbl * root_vpbl,struct nes_root_vpbl * new_root,u16 pbl_count_4k)1775 static u32 root_256(struct nes_device *nesdev,
1776 struct nes_root_vpbl *root_vpbl,
1777 struct nes_root_vpbl *new_root,
1778 u16 pbl_count_4k)
1779 {
1780 u64 leaf_pbl;
1781 int i, j, k;
1782
1783 if (pbl_count_4k == 1) {
1784 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1785 512, &new_root->pbl_pbase);
1786
1787 if (new_root->pbl_vbase == NULL)
1788 return 0;
1789
1790 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1791 for (i = 0; i < 16; i++) {
1792 new_root->pbl_vbase[i].pa_low =
1793 cpu_to_le32((u32)leaf_pbl);
1794 new_root->pbl_vbase[i].pa_high =
1795 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1796 leaf_pbl += 256;
1797 }
1798 } else {
1799 for (i = 3; i >= 0; i--) {
1800 j = i * 16;
1801 root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1802 leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1803 (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1804 << 32);
1805 for (k = 1; k < 16; k++) {
1806 leaf_pbl += 256;
1807 root_vpbl->pbl_vbase[j + k].pa_low =
1808 cpu_to_le32((u32)leaf_pbl);
1809 root_vpbl->pbl_vbase[j + k].pa_high =
1810 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1811 }
1812 }
1813 }
1814
1815 return 1;
1816 }
1817
1818
1819 /**
1820 * nes_reg_mr
1821 */
nes_reg_mr(struct nes_device * nesdev,struct nes_pd * nespd,u32 stag,u64 region_length,struct nes_root_vpbl * root_vpbl,dma_addr_t single_buffer,u16 pbl_count_4k,u16 residual_page_count_4k,int acc,u64 * iova_start,u16 * actual_pbl_cnt,u8 * used_4k_pbls)1822 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1823 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1824 dma_addr_t single_buffer, u16 pbl_count_4k,
1825 u16 residual_page_count_4k, int acc, u64 *iova_start,
1826 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1827 {
1828 struct nes_hw_cqp_wqe *cqp_wqe;
1829 struct nes_cqp_request *cqp_request;
1830 unsigned long flags;
1831 int ret;
1832 struct nes_adapter *nesadapter = nesdev->nesadapter;
1833 uint pg_cnt = 0;
1834 u16 pbl_count_256 = 0;
1835 u16 pbl_count = 0;
1836 u8 use_256_pbls = 0;
1837 u8 use_4k_pbls = 0;
1838 u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1839 struct nes_root_vpbl new_root = { 0, NULL, NULL };
1840 u32 opcode = 0;
1841 u16 major_code;
1842
1843 /* Register the region with the adapter */
1844 cqp_request = nes_get_cqp_request(nesdev);
1845 if (cqp_request == NULL) {
1846 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1847 return -ENOMEM;
1848 }
1849 cqp_request->waiting = 1;
1850 cqp_wqe = &cqp_request->cqp_wqe;
1851
1852 if (pbl_count_4k) {
1853 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1854
1855 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1856 pbl_count_256 = (pg_cnt + 31) / 32;
1857 if (pg_cnt <= 32) {
1858 if (pbl_count_256 <= nesadapter->free_256pbl)
1859 use_256_pbls = 1;
1860 else if (pbl_count_4k <= nesadapter->free_4kpbl)
1861 use_4k_pbls = 1;
1862 } else if (pg_cnt <= 2048) {
1863 if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1864 (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1865 use_4k_pbls = 1;
1866 } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1867 use_256_pbls = 1;
1868 use_two_level = 1;
1869 } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1870 use_4k_pbls = 1;
1871 }
1872 } else {
1873 if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1874 use_4k_pbls = 1;
1875 }
1876
1877 if (use_256_pbls) {
1878 pbl_count = pbl_count_256;
1879 nesadapter->free_256pbl -= pbl_count + use_two_level;
1880 } else if (use_4k_pbls) {
1881 pbl_count = pbl_count_4k;
1882 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1883 } else {
1884 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1885 nes_debug(NES_DBG_MR, "Out of Pbls\n");
1886 nes_free_cqp_request(nesdev, cqp_request);
1887 return -ENOMEM;
1888 }
1889
1890 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1891 }
1892
1893 if (use_256_pbls && use_two_level) {
1894 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1895 if (new_root.pbl_pbase != 0)
1896 root_vpbl = &new_root;
1897 } else {
1898 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1899 nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1900 use_256_pbls = 0;
1901
1902 if (pbl_count_4k == 1)
1903 use_two_level = 0;
1904 pbl_count = pbl_count_4k;
1905
1906 if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1907 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1908 use_4k_pbls = 1;
1909 }
1910 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1911
1912 if (use_4k_pbls == 0)
1913 return -ENOMEM;
1914 }
1915 }
1916
1917 opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1918 NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1919 if (acc & IB_ACCESS_LOCAL_WRITE)
1920 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1921 if (acc & IB_ACCESS_REMOTE_WRITE)
1922 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1923 if (acc & IB_ACCESS_REMOTE_READ)
1924 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1925 if (acc & IB_ACCESS_MW_BIND)
1926 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1927
1928 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1929 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1930 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1931 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1932
1933 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1934 cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1935 cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1936 cpu_to_le32(nespd->pd_id & 0x00007fff);
1937 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1938
1939 if (pbl_count == 0) {
1940 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1941 } else {
1942 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1943 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1944 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1945
1946 if (use_4k_pbls)
1947 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1948 }
1949 barrier();
1950
1951 atomic_set(&cqp_request->refcount, 2);
1952 nes_post_cqp_request(nesdev, cqp_request);
1953
1954 /* Wait for CQP */
1955 ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1956 NES_EVENT_TIMEOUT);
1957 nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1958 " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1959 stag, ret, cqp_request->major_code, cqp_request->minor_code);
1960 major_code = cqp_request->major_code;
1961 nes_put_cqp_request(nesdev, cqp_request);
1962
1963 if ((!ret || major_code) && pbl_count != 0) {
1964 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1965 if (use_256_pbls)
1966 nesadapter->free_256pbl += pbl_count + use_two_level;
1967 else if (use_4k_pbls)
1968 nesadapter->free_4kpbl += pbl_count + use_two_level;
1969 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1970 }
1971 if (new_root.pbl_pbase)
1972 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1973 new_root.pbl_pbase);
1974
1975 if (!ret)
1976 return -ETIME;
1977 else if (major_code)
1978 return -EIO;
1979
1980 *actual_pbl_cnt = pbl_count + use_two_level;
1981 *used_4k_pbls = use_4k_pbls;
1982 return 0;
1983 }
1984
1985
1986 /**
1987 * nes_reg_phys_mr
1988 */
nes_reg_phys_mr(struct ib_pd * ib_pd,u64 addr,u64 size,int acc,u64 * iova_start)1989 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
1990 int acc, u64 *iova_start)
1991 {
1992 u64 region_length;
1993 struct nes_pd *nespd = to_nespd(ib_pd);
1994 struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
1995 struct nes_device *nesdev = nesvnic->nesdev;
1996 struct nes_adapter *nesadapter = nesdev->nesadapter;
1997 struct nes_mr *nesmr;
1998 struct ib_mr *ibmr;
1999 struct nes_vpbl vpbl;
2000 struct nes_root_vpbl root_vpbl;
2001 u32 stag;
2002 unsigned long mask;
2003 u32 stag_index = 0;
2004 u32 next_stag_index = 0;
2005 u32 driver_key = 0;
2006 int err = 0;
2007 int ret = 0;
2008 u16 pbl_count = 0;
2009 u8 single_page = 1;
2010 u8 stag_key = 0;
2011
2012 region_length = 0;
2013 vpbl.pbl_vbase = NULL;
2014 root_vpbl.pbl_vbase = NULL;
2015 root_vpbl.pbl_pbase = 0;
2016
2017 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2018 stag_key = (u8)next_stag_index;
2019
2020 driver_key = 0;
2021
2022 next_stag_index >>= 8;
2023 next_stag_index %= nesadapter->max_mr;
2024
2025 if ((addr ^ *iova_start) & ~PAGE_MASK)
2026 return ERR_PTR(-EINVAL);
2027
2028 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2029 &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2030 if (err) {
2031 return ERR_PTR(err);
2032 }
2033
2034 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2035 if (!nesmr) {
2036 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2037 return ERR_PTR(-ENOMEM);
2038 }
2039
2040 /* Allocate a 4K buffer for the PBL */
2041 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2042 &vpbl.pbl_pbase);
2043 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2044 vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2045 if (!vpbl.pbl_vbase) {
2046 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2047 ibmr = ERR_PTR(-ENOMEM);
2048 kfree(nesmr);
2049 goto reg_phys_err;
2050 }
2051
2052
2053 mask = !size;
2054
2055 if (mask & ~PAGE_MASK) {
2056 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2057 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2058 ibmr = ERR_PTR(-EINVAL);
2059 kfree(nesmr);
2060 goto reg_phys_err;
2061 }
2062
2063 region_length += size;
2064 vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2065 vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2066
2067 stag = stag_index << 8;
2068 stag |= driver_key;
2069 stag += (u32)stag_key;
2070
2071 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2072 " length = 0x%016lX, index = 0x%08X\n",
2073 stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2074
2075 /* Make the leaf PBL the root if only one PBL */
2076 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2077
2078 if (single_page) {
2079 pbl_count = 0;
2080 } else {
2081 pbl_count = 1;
2082 }
2083 ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2084 addr, pbl_count, 1, acc, iova_start,
2085 &nesmr->pbls_used, &nesmr->pbl_4k);
2086
2087 if (ret == 0) {
2088 nesmr->ibmr.rkey = stag;
2089 nesmr->ibmr.lkey = stag;
2090 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2091 ibmr = &nesmr->ibmr;
2092 } else {
2093 kfree(nesmr);
2094 ibmr = ERR_PTR(-ENOMEM);
2095 }
2096
2097 reg_phys_err:
2098 /* single PBL case */
2099 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2100 return ibmr;
2101 }
2102
2103
2104 /**
2105 * nes_get_dma_mr
2106 */
nes_get_dma_mr(struct ib_pd * pd,int acc)2107 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2108 {
2109 u64 kva = 0;
2110
2111 nes_debug(NES_DBG_MR, "\n");
2112
2113 return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2114 }
2115
2116 /**
2117 * nes_reg_user_mr
2118 */
nes_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)2119 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2120 u64 virt, int acc, struct ib_udata *udata)
2121 {
2122 u64 iova_start;
2123 __le64 *pbl;
2124 u64 region_length;
2125 dma_addr_t last_dma_addr = 0;
2126 dma_addr_t first_dma_addr = 0;
2127 struct nes_pd *nespd = to_nespd(pd);
2128 struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2129 struct nes_device *nesdev = nesvnic->nesdev;
2130 struct nes_adapter *nesadapter = nesdev->nesadapter;
2131 struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2132 struct scatterlist *sg;
2133 struct nes_ucontext *nes_ucontext;
2134 struct nes_pbl *nespbl;
2135 struct nes_mr *nesmr;
2136 struct ib_umem *region;
2137 struct nes_mem_reg_req req;
2138 struct nes_vpbl vpbl;
2139 struct nes_root_vpbl root_vpbl;
2140 int entry, page_index;
2141 int page_count = 0;
2142 int err, pbl_depth = 0;
2143 int chunk_pages;
2144 int ret;
2145 u32 stag;
2146 u32 stag_index = 0;
2147 u32 next_stag_index;
2148 u32 driver_key;
2149 u32 root_pbl_index = 0;
2150 u32 cur_pbl_index = 0;
2151 u32 skip_pages;
2152 u16 pbl_count;
2153 u8 single_page = 1;
2154 u8 stag_key;
2155 int first_page = 1;
2156
2157 region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2158 if (IS_ERR(region)) {
2159 return (struct ib_mr *)region;
2160 }
2161
2162 nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2163 " offset = %u, page size = %lu.\n",
2164 (unsigned long int)start, (unsigned long int)virt, (u32)length,
2165 ib_umem_offset(region), BIT(region->page_shift));
2166
2167 skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2168
2169 if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2170 ib_umem_release(region);
2171 return ERR_PTR(-EFAULT);
2172 }
2173 nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2174
2175 switch (req.reg_type) {
2176 case IWNES_MEMREG_TYPE_MEM:
2177 pbl_depth = 0;
2178 region_length = 0;
2179 vpbl.pbl_vbase = NULL;
2180 root_vpbl.pbl_vbase = NULL;
2181 root_vpbl.pbl_pbase = 0;
2182
2183 get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2184 stag_key = (u8)next_stag_index;
2185
2186 driver_key = next_stag_index & 0x70000000;
2187
2188 next_stag_index >>= 8;
2189 next_stag_index %= nesadapter->max_mr;
2190
2191 err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2192 nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2193 if (err) {
2194 ib_umem_release(region);
2195 return ERR_PTR(err);
2196 }
2197
2198 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2199 if (!nesmr) {
2200 ib_umem_release(region);
2201 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2202 return ERR_PTR(-ENOMEM);
2203 }
2204 nesmr->region = region;
2205
2206 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2207 if (sg_dma_address(sg) & ~PAGE_MASK) {
2208 ib_umem_release(region);
2209 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2210 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2211 (unsigned int) sg_dma_address(sg));
2212 ibmr = ERR_PTR(-EINVAL);
2213 kfree(nesmr);
2214 goto reg_user_mr_err;
2215 }
2216
2217 if (!sg_dma_len(sg)) {
2218 ib_umem_release(region);
2219 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2220 stag_index);
2221 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2222 ibmr = ERR_PTR(-EINVAL);
2223 kfree(nesmr);
2224 goto reg_user_mr_err;
2225 }
2226
2227 region_length += sg_dma_len(sg);
2228 chunk_pages = sg_dma_len(sg) >> 12;
2229 region_length -= skip_pages << 12;
2230 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2231 skip_pages = 0;
2232 if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2233 goto enough_pages;
2234 if ((page_count&0x01FF) == 0) {
2235 if (page_count >= 1024 * 512) {
2236 ib_umem_release(region);
2237 nes_free_resource(nesadapter,
2238 nesadapter->allocated_mrs, stag_index);
2239 kfree(nesmr);
2240 ibmr = ERR_PTR(-E2BIG);
2241 goto reg_user_mr_err;
2242 }
2243 if (root_pbl_index == 1) {
2244 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2245 8192, &root_vpbl.pbl_pbase);
2246 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2247 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2248 if (!root_vpbl.pbl_vbase) {
2249 ib_umem_release(region);
2250 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2251 vpbl.pbl_pbase);
2252 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2253 stag_index);
2254 kfree(nesmr);
2255 ibmr = ERR_PTR(-ENOMEM);
2256 goto reg_user_mr_err;
2257 }
2258 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2259 GFP_KERNEL);
2260 if (!root_vpbl.leaf_vpbl) {
2261 ib_umem_release(region);
2262 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2263 root_vpbl.pbl_pbase);
2264 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2265 vpbl.pbl_pbase);
2266 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2267 stag_index);
2268 kfree(nesmr);
2269 ibmr = ERR_PTR(-ENOMEM);
2270 goto reg_user_mr_err;
2271 }
2272 root_vpbl.pbl_vbase[0].pa_low =
2273 cpu_to_le32((u32)vpbl.pbl_pbase);
2274 root_vpbl.pbl_vbase[0].pa_high =
2275 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2276 root_vpbl.leaf_vpbl[0] = vpbl;
2277 }
2278 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2279 &vpbl.pbl_pbase);
2280 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2281 vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2282 if (!vpbl.pbl_vbase) {
2283 ib_umem_release(region);
2284 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2285 ibmr = ERR_PTR(-ENOMEM);
2286 kfree(nesmr);
2287 goto reg_user_mr_err;
2288 }
2289 if (1 <= root_pbl_index) {
2290 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2291 cpu_to_le32((u32)vpbl.pbl_pbase);
2292 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2293 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2294 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2295 }
2296 root_pbl_index++;
2297 cur_pbl_index = 0;
2298 }
2299 if (single_page) {
2300 if (page_count != 0) {
2301 if ((last_dma_addr+4096) !=
2302 (sg_dma_address(sg)+
2303 (page_index*4096)))
2304 single_page = 0;
2305 last_dma_addr = sg_dma_address(sg)+
2306 (page_index*4096);
2307 } else {
2308 first_dma_addr = sg_dma_address(sg)+
2309 (page_index*4096);
2310 last_dma_addr = first_dma_addr;
2311 }
2312 }
2313
2314 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2315 cpu_to_le32((u32)(sg_dma_address(sg)+
2316 (page_index*4096)));
2317 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2318 cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2319 (page_index*4096))) >> 32)));
2320 cur_pbl_index++;
2321 page_count++;
2322 }
2323 }
2324
2325 enough_pages:
2326 nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2327 " stag_key=0x%08x\n",
2328 stag_index, driver_key, stag_key);
2329 stag = stag_index << 8;
2330 stag |= driver_key;
2331 stag += (u32)stag_key;
2332
2333 iova_start = virt;
2334 /* Make the leaf PBL the root if only one PBL */
2335 if (root_pbl_index == 1) {
2336 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2337 }
2338
2339 if (single_page) {
2340 pbl_count = 0;
2341 } else {
2342 pbl_count = root_pbl_index;
2343 first_dma_addr = 0;
2344 }
2345 nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2346 " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2347 stag, (unsigned int)iova_start,
2348 (unsigned int)region_length, stag_index,
2349 (unsigned long long)region->length, pbl_count);
2350 ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2351 first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2352 &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2353
2354 nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2355
2356 if (ret == 0) {
2357 nesmr->ibmr.rkey = stag;
2358 nesmr->ibmr.lkey = stag;
2359 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2360 ibmr = &nesmr->ibmr;
2361 } else {
2362 ib_umem_release(region);
2363 kfree(nesmr);
2364 ibmr = ERR_PTR(-ENOMEM);
2365 }
2366
2367 reg_user_mr_err:
2368 /* free the resources */
2369 if (root_pbl_index == 1) {
2370 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2371 vpbl.pbl_pbase);
2372 } else {
2373 for (page_index=0; page_index<root_pbl_index; page_index++) {
2374 pci_free_consistent(nesdev->pcidev, 4096,
2375 root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2376 root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2377 }
2378 kfree(root_vpbl.leaf_vpbl);
2379 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2380 root_vpbl.pbl_pbase);
2381 }
2382
2383 nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2384
2385 return ibmr;
2386 case IWNES_MEMREG_TYPE_QP:
2387 case IWNES_MEMREG_TYPE_CQ:
2388 if (!region->length) {
2389 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2390 ib_umem_release(region);
2391 return ERR_PTR(-EINVAL);
2392 }
2393 nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2394 if (!nespbl) {
2395 ib_umem_release(region);
2396 return ERR_PTR(-ENOMEM);
2397 }
2398 nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2399 if (!nesmr) {
2400 ib_umem_release(region);
2401 kfree(nespbl);
2402 return ERR_PTR(-ENOMEM);
2403 }
2404 nesmr->region = region;
2405 nes_ucontext = to_nesucontext(pd->uobject->context);
2406 pbl_depth = region->length >> 12;
2407 pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2408 nespbl->pbl_size = pbl_depth*sizeof(u64);
2409 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2410 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2411 } else {
2412 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2413 }
2414
2415 nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2416 nespbl->pbl_size, pbl_depth);
2417 pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2418 &nespbl->pbl_pbase);
2419 if (!pbl) {
2420 ib_umem_release(region);
2421 kfree(nesmr);
2422 kfree(nespbl);
2423 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2424 return ERR_PTR(-ENOMEM);
2425 }
2426
2427 nespbl->pbl_vbase = (u64 *)pbl;
2428 nespbl->user_base = start;
2429 nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2430 " pbl_vbase=%p user_base=0x%lx\n",
2431 nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2432 (void *) nespbl->pbl_vbase, nespbl->user_base);
2433
2434 for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2435 chunk_pages = sg_dma_len(sg) >> 12;
2436 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2437 if (first_page) {
2438 nespbl->page = sg_page(sg);
2439 first_page = 0;
2440 }
2441
2442 for (page_index = 0; page_index < chunk_pages; page_index++) {
2443 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2444 (sg_dma_address(sg)+
2445 (page_index*4096)));
2446 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2447 (sg_dma_address(sg)+
2448 (page_index*4096)))>>32);
2449 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2450 (unsigned long long)*pbl,
2451 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2452 pbl++;
2453 }
2454 }
2455
2456 if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2457 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2458 } else {
2459 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2460 }
2461 nesmr->ibmr.rkey = -1;
2462 nesmr->ibmr.lkey = -1;
2463 nesmr->mode = req.reg_type;
2464 return &nesmr->ibmr;
2465 }
2466
2467 ib_umem_release(region);
2468 return ERR_PTR(-ENOSYS);
2469 }
2470
2471
2472 /**
2473 * nes_dereg_mr
2474 */
nes_dereg_mr(struct ib_mr * ib_mr)2475 static int nes_dereg_mr(struct ib_mr *ib_mr)
2476 {
2477 struct nes_mr *nesmr = to_nesmr(ib_mr);
2478 struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2479 struct nes_device *nesdev = nesvnic->nesdev;
2480 struct nes_adapter *nesadapter = nesdev->nesadapter;
2481 struct nes_hw_cqp_wqe *cqp_wqe;
2482 struct nes_cqp_request *cqp_request;
2483 unsigned long flags;
2484 int ret;
2485 u16 major_code;
2486 u16 minor_code;
2487
2488
2489 if (nesmr->pages)
2490 pci_free_consistent(nesdev->pcidev,
2491 nesmr->max_pages * sizeof(u64),
2492 nesmr->pages,
2493 nesmr->paddr);
2494
2495 if (nesmr->region) {
2496 ib_umem_release(nesmr->region);
2497 }
2498 if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2499 kfree(nesmr);
2500 return 0;
2501 }
2502
2503 /* Deallocate the region with the adapter */
2504
2505 cqp_request = nes_get_cqp_request(nesdev);
2506 if (cqp_request == NULL) {
2507 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2508 return -ENOMEM;
2509 }
2510 cqp_request->waiting = 1;
2511 cqp_wqe = &cqp_request->cqp_wqe;
2512
2513 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2514 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2515 NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2516 NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2517 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2518
2519 atomic_set(&cqp_request->refcount, 2);
2520 nes_post_cqp_request(nesdev, cqp_request);
2521
2522 /* Wait for CQP */
2523 nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2524 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2525 NES_EVENT_TIMEOUT);
2526 nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2527 " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2528 ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2529
2530 major_code = cqp_request->major_code;
2531 minor_code = cqp_request->minor_code;
2532
2533 nes_put_cqp_request(nesdev, cqp_request);
2534
2535 if (!ret) {
2536 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2537 " ib_mr=%p, rkey = 0x%08X\n",
2538 ib_mr, ib_mr->rkey);
2539 return -ETIME;
2540 } else if (major_code) {
2541 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2542 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2543 major_code, minor_code, ib_mr, ib_mr->rkey);
2544 return -EIO;
2545 }
2546
2547 if (nesmr->pbls_used != 0) {
2548 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2549 if (nesmr->pbl_4k) {
2550 nesadapter->free_4kpbl += nesmr->pbls_used;
2551 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2552 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2553 "exceeded the max(%u)\n",
2554 nesadapter->free_4kpbl,
2555 nesadapter->max_4kpbl);
2556 } else {
2557 nesadapter->free_256pbl += nesmr->pbls_used;
2558 if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2559 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2560 "exceeded the max(%u)\n",
2561 nesadapter->free_256pbl,
2562 nesadapter->max_256pbl);
2563 }
2564 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2565 }
2566 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2567 (ib_mr->rkey & 0x0fffff00) >> 8);
2568
2569 kfree(nesmr);
2570
2571 return 0;
2572 }
2573
2574
2575 /**
2576 * show_rev
2577 */
show_rev(struct device * dev,struct device_attribute * attr,char * buf)2578 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2579 char *buf)
2580 {
2581 struct nes_ib_device *nesibdev =
2582 container_of(dev, struct nes_ib_device, ibdev.dev);
2583 struct nes_vnic *nesvnic = nesibdev->nesvnic;
2584
2585 nes_debug(NES_DBG_INIT, "\n");
2586 return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2587 }
2588
2589
2590 /**
2591 * show_hca
2592 */
show_hca(struct device * dev,struct device_attribute * attr,char * buf)2593 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2594 char *buf)
2595 {
2596 nes_debug(NES_DBG_INIT, "\n");
2597 return sprintf(buf, "NES020\n");
2598 }
2599
2600
2601 /**
2602 * show_board
2603 */
show_board(struct device * dev,struct device_attribute * attr,char * buf)2604 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2605 char *buf)
2606 {
2607 nes_debug(NES_DBG_INIT, "\n");
2608 return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2609 }
2610
2611
2612 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2613 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2614 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2615
2616 static struct device_attribute *nes_dev_attributes[] = {
2617 &dev_attr_hw_rev,
2618 &dev_attr_hca_type,
2619 &dev_attr_board_id
2620 };
2621
2622
2623 /**
2624 * nes_query_qp
2625 */
nes_query_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_qp_init_attr * init_attr)2626 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2627 int attr_mask, struct ib_qp_init_attr *init_attr)
2628 {
2629 struct nes_qp *nesqp = to_nesqp(ibqp);
2630
2631 nes_debug(NES_DBG_QP, "\n");
2632
2633 attr->qp_access_flags = 0;
2634 attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2635 attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2636 attr->cap.max_recv_sge = 1;
2637 if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2638 attr->cap.max_inline_data = 0;
2639 else
2640 attr->cap.max_inline_data = 64;
2641
2642 init_attr->event_handler = nesqp->ibqp.event_handler;
2643 init_attr->qp_context = nesqp->ibqp.qp_context;
2644 init_attr->send_cq = nesqp->ibqp.send_cq;
2645 init_attr->recv_cq = nesqp->ibqp.recv_cq;
2646 init_attr->srq = nesqp->ibqp.srq;
2647 init_attr->cap = attr->cap;
2648
2649 return 0;
2650 }
2651
2652
2653 /**
2654 * nes_hw_modify_qp
2655 */
nes_hw_modify_qp(struct nes_device * nesdev,struct nes_qp * nesqp,u32 next_iwarp_state,u32 termlen,u32 wait_completion)2656 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2657 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2658 {
2659 struct nes_hw_cqp_wqe *cqp_wqe;
2660 /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2661 /* struct iw_cm_event cm_event; */
2662 struct nes_cqp_request *cqp_request;
2663 int ret;
2664 u16 major_code;
2665
2666 nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2667 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2668
2669 cqp_request = nes_get_cqp_request(nesdev);
2670 if (cqp_request == NULL) {
2671 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2672 return -ENOMEM;
2673 }
2674 if (wait_completion) {
2675 cqp_request->waiting = 1;
2676 } else {
2677 cqp_request->waiting = 0;
2678 }
2679 cqp_wqe = &cqp_request->cqp_wqe;
2680
2681 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2682 NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2683 nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2684 next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2685 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2686 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2687 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2688
2689 /* If sending a terminate message, fill in the length (in words) */
2690 if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2691 !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2692 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2693 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2694 }
2695
2696 atomic_set(&cqp_request->refcount, 2);
2697 nes_post_cqp_request(nesdev, cqp_request);
2698
2699 /* Wait for CQP */
2700 if (wait_completion) {
2701 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2702 nesqp->hwqp.qp_id); */
2703 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2704 NES_EVENT_TIMEOUT);
2705 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2706 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2707 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2708 major_code = cqp_request->major_code;
2709 if (major_code) {
2710 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2711 "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2712 nesqp->hwqp.qp_id, cqp_request->major_code,
2713 cqp_request->minor_code, next_iwarp_state);
2714 }
2715
2716 nes_put_cqp_request(nesdev, cqp_request);
2717
2718 if (!ret)
2719 return -ETIME;
2720 else if (major_code)
2721 return -EIO;
2722 else
2723 return 0;
2724 } else {
2725 return 0;
2726 }
2727 }
2728
2729
2730 /**
2731 * nes_modify_qp
2732 */
nes_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)2733 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2734 int attr_mask, struct ib_udata *udata)
2735 {
2736 struct nes_qp *nesqp = to_nesqp(ibqp);
2737 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2738 struct nes_device *nesdev = nesvnic->nesdev;
2739 /* u32 cqp_head; */
2740 /* u32 counter; */
2741 u32 next_iwarp_state = 0;
2742 int err;
2743 unsigned long qplockflags;
2744 int ret;
2745 u16 original_last_aeq;
2746 u8 issue_modify_qp = 0;
2747 u8 dont_wait = 0;
2748
2749 nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2750 " iwarp_state=0x%X, refcount=%d\n",
2751 nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2752 nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2753
2754 spin_lock_irqsave(&nesqp->lock, qplockflags);
2755
2756 nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2757 " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2758 nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2759 nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2760
2761 if (attr_mask & IB_QP_STATE) {
2762 switch (attr->qp_state) {
2763 case IB_QPS_INIT:
2764 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2765 nesqp->hwqp.qp_id);
2766 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2767 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2768 return -EINVAL;
2769 }
2770 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2771 issue_modify_qp = 1;
2772 break;
2773 case IB_QPS_RTR:
2774 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2775 nesqp->hwqp.qp_id);
2776 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2777 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2778 return -EINVAL;
2779 }
2780 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2781 issue_modify_qp = 1;
2782 break;
2783 case IB_QPS_RTS:
2784 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2785 nesqp->hwqp.qp_id);
2786 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2787 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2788 return -EINVAL;
2789 }
2790 if (nesqp->cm_id == NULL) {
2791 nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2792 nesqp->hwqp.qp_id );
2793 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2794 return -EINVAL;
2795 }
2796 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2797 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2798 next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2799 NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2800 issue_modify_qp = 1;
2801 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2802 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2803 nesqp->hte_added = 1;
2804 break;
2805 case IB_QPS_SQD:
2806 issue_modify_qp = 1;
2807 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2808 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2809 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2810 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2811 return 0;
2812 } else {
2813 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2814 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2815 " ignored due to current iWARP state\n",
2816 nesqp->hwqp.qp_id);
2817 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2818 return -EINVAL;
2819 }
2820 if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2821 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2822 " already done based on hw state.\n",
2823 nesqp->hwqp.qp_id);
2824 issue_modify_qp = 0;
2825 }
2826 switch (nesqp->hw_iwarp_state) {
2827 case NES_AEQE_IWARP_STATE_CLOSING:
2828 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2829 break;
2830 case NES_AEQE_IWARP_STATE_TERMINATE:
2831 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2832 break;
2833 case NES_AEQE_IWARP_STATE_ERROR:
2834 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2835 break;
2836 default:
2837 next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2838 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2839 break;
2840 }
2841 }
2842 break;
2843 case IB_QPS_SQE:
2844 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2845 nesqp->hwqp.qp_id);
2846 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2847 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2848 return -EINVAL;
2849 }
2850 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2851 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2852 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2853 issue_modify_qp = 1;
2854 break;
2855 case IB_QPS_ERR:
2856 case IB_QPS_RESET:
2857 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2858 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2859 return -EINVAL;
2860 }
2861 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2862 nesqp->hwqp.qp_id);
2863 if (nesqp->term_flags)
2864 del_timer(&nesqp->terminate_timer);
2865
2866 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2867 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2868 if (nesqp->hte_added) {
2869 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2870 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2871 nesqp->hte_added = 0;
2872 }
2873 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2874 (nesdev->iw_status) &&
2875 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2876 next_iwarp_state |= NES_CQP_QP_RESET;
2877 } else {
2878 nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2879 nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2880 dont_wait = 1;
2881 }
2882 issue_modify_qp = 1;
2883 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2884 break;
2885 default:
2886 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2887 return -EINVAL;
2888 break;
2889 }
2890
2891 nesqp->ibqp_state = attr->qp_state;
2892 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2893 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2894 nesqp->iwarp_state);
2895 }
2896
2897 if (attr_mask & IB_QP_ACCESS_FLAGS) {
2898 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2899 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2900 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2901 issue_modify_qp = 1;
2902 }
2903 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2904 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2905 issue_modify_qp = 1;
2906 }
2907 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2908 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2909 issue_modify_qp = 1;
2910 }
2911 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2912 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2913 issue_modify_qp = 1;
2914 }
2915
2916 if (nesqp->user_mode) {
2917 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2918 NES_QPCONTEXT_MISC_RDMA_READ_EN);
2919 issue_modify_qp = 1;
2920 }
2921 }
2922
2923 original_last_aeq = nesqp->last_aeq;
2924 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2925
2926 nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2927
2928 ret = 0;
2929
2930
2931 if (issue_modify_qp) {
2932 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2933 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2934 if (ret)
2935 nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2936 " failed for QP%u.\n",
2937 next_iwarp_state, nesqp->hwqp.qp_id);
2938
2939 }
2940
2941 if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2942 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2943 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2944 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2945 original_last_aeq, nesqp->last_aeq);
2946 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2947 if (dont_wait) {
2948 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2949 nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2950 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2951 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2952 original_last_aeq, nesqp->last_aeq);
2953 /* this one is for the cm_disconnect thread */
2954 spin_lock_irqsave(&nesqp->lock, qplockflags);
2955 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2956 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2957 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2958 nes_cm_disconn(nesqp);
2959 } else {
2960 nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2961 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2962 }
2963 } else {
2964 spin_lock_irqsave(&nesqp->lock, qplockflags);
2965 if (nesqp->cm_id) {
2966 /* These two are for the timer thread */
2967 if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
2968 nesqp->cm_id->add_ref(nesqp->cm_id);
2969 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2970 " need ae to finish up, original_last_aeq = 0x%04X."
2971 " last_aeq = 0x%04X, scheduling timer.\n",
2972 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2973 original_last_aeq, nesqp->last_aeq);
2974 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
2975 }
2976 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2977 } else {
2978 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2979 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2980 " need ae to finish up, original_last_aeq = 0x%04X."
2981 " last_aeq = 0x%04X.\n",
2982 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2983 original_last_aeq, nesqp->last_aeq);
2984 }
2985 }
2986 } else {
2987 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2988 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2989 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2990 original_last_aeq, nesqp->last_aeq);
2991 }
2992 } else {
2993 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2994 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2995 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2996 original_last_aeq, nesqp->last_aeq);
2997 }
2998
2999 err = 0;
3000
3001 nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3002 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3003
3004 return err;
3005 }
3006
3007
3008 /**
3009 * nes_muticast_attach
3010 */
nes_multicast_attach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)3011 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3012 {
3013 nes_debug(NES_DBG_INIT, "\n");
3014 return -ENOSYS;
3015 }
3016
3017
3018 /**
3019 * nes_multicast_detach
3020 */
nes_multicast_detach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)3021 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3022 {
3023 nes_debug(NES_DBG_INIT, "\n");
3024 return -ENOSYS;
3025 }
3026
3027
3028 /**
3029 * nes_process_mad
3030 */
nes_process_mad(struct ib_device * ibdev,int mad_flags,u8 port_num,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const struct ib_mad_hdr * in,size_t in_mad_size,struct ib_mad_hdr * out,size_t * out_mad_size,u16 * out_mad_pkey_index)3031 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3032 u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
3033 const struct ib_mad_hdr *in, size_t in_mad_size,
3034 struct ib_mad_hdr *out, size_t *out_mad_size,
3035 u16 *out_mad_pkey_index)
3036 {
3037 nes_debug(NES_DBG_INIT, "\n");
3038 return -ENOSYS;
3039 }
3040
3041 static inline void
fill_wqe_sg_send(struct nes_hw_qp_wqe * wqe,struct ib_send_wr * ib_wr,u32 uselkey)3042 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3043 {
3044 int sge_index;
3045 int total_payload_length = 0;
3046 for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3047 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3048 ib_wr->sg_list[sge_index].addr);
3049 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3050 ib_wr->sg_list[sge_index].length);
3051 if (uselkey)
3052 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3053 (ib_wr->sg_list[sge_index].lkey));
3054 else
3055 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3056
3057 total_payload_length += ib_wr->sg_list[sge_index].length;
3058 }
3059 nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3060 total_payload_length);
3061 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3062 total_payload_length);
3063 }
3064
3065 /**
3066 * nes_post_send
3067 */
nes_post_send(struct ib_qp * ibqp,struct ib_send_wr * ib_wr,struct ib_send_wr ** bad_wr)3068 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3069 struct ib_send_wr **bad_wr)
3070 {
3071 u64 u64temp;
3072 unsigned long flags = 0;
3073 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3074 struct nes_device *nesdev = nesvnic->nesdev;
3075 struct nes_qp *nesqp = to_nesqp(ibqp);
3076 struct nes_hw_qp_wqe *wqe;
3077 int err = 0;
3078 u32 qsize = nesqp->hwqp.sq_size;
3079 u32 head;
3080 u32 wqe_misc = 0;
3081 u32 wqe_count = 0;
3082 u32 counter;
3083
3084 if (nesqp->ibqp_state > IB_QPS_RTS) {
3085 err = -EINVAL;
3086 goto out;
3087 }
3088
3089 spin_lock_irqsave(&nesqp->lock, flags);
3090
3091 head = nesqp->hwqp.sq_head;
3092
3093 while (ib_wr) {
3094 /* Check for QP error */
3095 if (nesqp->term_flags) {
3096 err = -EINVAL;
3097 break;
3098 }
3099
3100 /* Check for SQ overflow */
3101 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3102 err = -ENOMEM;
3103 break;
3104 }
3105
3106 wqe = &nesqp->hwqp.sq_vbase[head];
3107 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3108 nesqp->hwqp.qp_id, wqe, head); */
3109 nes_fill_init_qp_wqe(wqe, nesqp, head);
3110 u64temp = (u64)(ib_wr->wr_id);
3111 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3112 u64temp);
3113 switch (ib_wr->opcode) {
3114 case IB_WR_SEND:
3115 case IB_WR_SEND_WITH_INV:
3116 if (IB_WR_SEND == ib_wr->opcode) {
3117 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3118 wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3119 else
3120 wqe_misc = NES_IWARP_SQ_OP_SEND;
3121 } else {
3122 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3123 wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3124 else
3125 wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3126
3127 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3128 ib_wr->ex.invalidate_rkey);
3129 }
3130
3131 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3132 err = -EINVAL;
3133 break;
3134 }
3135
3136 if (ib_wr->send_flags & IB_SEND_FENCE)
3137 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3138
3139 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3140 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3141 (ib_wr->sg_list[0].length <= 64)) {
3142 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3143 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3144 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3145 ib_wr->sg_list[0].length);
3146 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3147 } else {
3148 fill_wqe_sg_send(wqe, ib_wr, 1);
3149 }
3150
3151 break;
3152 case IB_WR_RDMA_WRITE:
3153 wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3154 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3155 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3156 ib_wr->num_sge, nesdev->nesadapter->max_sge);
3157 err = -EINVAL;
3158 break;
3159 }
3160
3161 if (ib_wr->send_flags & IB_SEND_FENCE)
3162 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3163
3164 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3165 rdma_wr(ib_wr)->rkey);
3166 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3167 rdma_wr(ib_wr)->remote_addr);
3168
3169 if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3170 ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3171 (ib_wr->sg_list[0].length <= 64)) {
3172 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3173 (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3174 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3175 ib_wr->sg_list[0].length);
3176 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3177 } else {
3178 fill_wqe_sg_send(wqe, ib_wr, 1);
3179 }
3180
3181 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3182 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3183 break;
3184 case IB_WR_RDMA_READ:
3185 case IB_WR_RDMA_READ_WITH_INV:
3186 /* iWARP only supports 1 sge for RDMA reads */
3187 if (ib_wr->num_sge > 1) {
3188 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3189 ib_wr->num_sge);
3190 err = -EINVAL;
3191 break;
3192 }
3193 if (ib_wr->opcode == IB_WR_RDMA_READ) {
3194 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3195 } else {
3196 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3197 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3198 ib_wr->ex.invalidate_rkey);
3199 }
3200
3201 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3202 rdma_wr(ib_wr)->remote_addr);
3203 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3204 rdma_wr(ib_wr)->rkey);
3205 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3206 ib_wr->sg_list->length);
3207 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3208 ib_wr->sg_list->addr);
3209 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3210 ib_wr->sg_list->lkey);
3211 break;
3212 case IB_WR_LOCAL_INV:
3213 wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3214 set_wqe_32bit_value(wqe->wqe_words,
3215 NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3216 ib_wr->ex.invalidate_rkey);
3217 break;
3218 case IB_WR_REG_MR:
3219 {
3220 struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3221 int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3222 int flags = reg_wr(ib_wr)->access;
3223
3224 if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3225 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3226 err = -EINVAL;
3227 break;
3228 }
3229 wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3230 set_wqe_64bit_value(wqe->wqe_words,
3231 NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3232 mr->ibmr.iova);
3233 set_wqe_32bit_value(wqe->wqe_words,
3234 NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3235 lower_32_bits(mr->ibmr.length));
3236 set_wqe_32bit_value(wqe->wqe_words,
3237 NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3238 set_wqe_32bit_value(wqe->wqe_words,
3239 NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3240 reg_wr(ib_wr)->key);
3241
3242 if (page_shift == 12) {
3243 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3244 } else if (page_shift == 21) {
3245 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3246 } else {
3247 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3248 " ib_wr=%u, max=1\n", ib_wr->num_sge);
3249 err = -EINVAL;
3250 break;
3251 }
3252
3253 /* Set access_flags */
3254 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3255 if (flags & IB_ACCESS_LOCAL_WRITE)
3256 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3257
3258 if (flags & IB_ACCESS_REMOTE_WRITE)
3259 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3260
3261 if (flags & IB_ACCESS_REMOTE_READ)
3262 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3263
3264 if (flags & IB_ACCESS_MW_BIND)
3265 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3266
3267 /* Fill in PBL info: */
3268 set_wqe_64bit_value(wqe->wqe_words,
3269 NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3270 mr->paddr);
3271
3272 set_wqe_32bit_value(wqe->wqe_words,
3273 NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3274 mr->npages * 8);
3275
3276 nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3277 "length: %lld, rkey: %0x, pgl_paddr: %llx, "
3278 "page_list_len: %u, wqe_misc: %x\n",
3279 (unsigned long long) mr->ibmr.iova,
3280 mr->ibmr.length,
3281 reg_wr(ib_wr)->key,
3282 (unsigned long long) mr->paddr,
3283 mr->npages,
3284 wqe_misc);
3285 break;
3286 }
3287 default:
3288 /* error */
3289 err = -EINVAL;
3290 break;
3291 }
3292
3293 if (err)
3294 break;
3295
3296 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3297 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3298
3299 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3300
3301 ib_wr = ib_wr->next;
3302 head++;
3303 wqe_count++;
3304 if (head >= qsize)
3305 head = 0;
3306
3307 }
3308
3309 nesqp->hwqp.sq_head = head;
3310 barrier();
3311 while (wqe_count) {
3312 counter = min(wqe_count, ((u32)255));
3313 wqe_count -= counter;
3314 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3315 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3316 }
3317
3318 spin_unlock_irqrestore(&nesqp->lock, flags);
3319
3320 out:
3321 if (err)
3322 *bad_wr = ib_wr;
3323 return err;
3324 }
3325
3326
3327 /**
3328 * nes_post_recv
3329 */
nes_post_recv(struct ib_qp * ibqp,struct ib_recv_wr * ib_wr,struct ib_recv_wr ** bad_wr)3330 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3331 struct ib_recv_wr **bad_wr)
3332 {
3333 u64 u64temp;
3334 unsigned long flags = 0;
3335 struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3336 struct nes_device *nesdev = nesvnic->nesdev;
3337 struct nes_qp *nesqp = to_nesqp(ibqp);
3338 struct nes_hw_qp_wqe *wqe;
3339 int err = 0;
3340 int sge_index;
3341 u32 qsize = nesqp->hwqp.rq_size;
3342 u32 head;
3343 u32 wqe_count = 0;
3344 u32 counter;
3345 u32 total_payload_length;
3346
3347 if (nesqp->ibqp_state > IB_QPS_RTS) {
3348 err = -EINVAL;
3349 goto out;
3350 }
3351
3352 spin_lock_irqsave(&nesqp->lock, flags);
3353
3354 head = nesqp->hwqp.rq_head;
3355
3356 while (ib_wr) {
3357 /* Check for QP error */
3358 if (nesqp->term_flags) {
3359 err = -EINVAL;
3360 break;
3361 }
3362
3363 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3364 err = -EINVAL;
3365 break;
3366 }
3367 /* Check for RQ overflow */
3368 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3369 err = -ENOMEM;
3370 break;
3371 }
3372
3373 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3374 wqe = &nesqp->hwqp.rq_vbase[head];
3375
3376 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3377 nesqp->hwqp.qp_id, wqe, head); */
3378 nes_fill_init_qp_wqe(wqe, nesqp, head);
3379 u64temp = (u64)(ib_wr->wr_id);
3380 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3381 u64temp);
3382 total_payload_length = 0;
3383 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3384 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3385 ib_wr->sg_list[sge_index].addr);
3386 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3387 ib_wr->sg_list[sge_index].length);
3388 set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3389 ib_wr->sg_list[sge_index].lkey);
3390
3391 total_payload_length += ib_wr->sg_list[sge_index].length;
3392 }
3393 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3394 total_payload_length);
3395
3396 ib_wr = ib_wr->next;
3397 head++;
3398 wqe_count++;
3399 if (head >= qsize)
3400 head = 0;
3401 }
3402
3403 nesqp->hwqp.rq_head = head;
3404 barrier();
3405 while (wqe_count) {
3406 counter = min(wqe_count, ((u32)255));
3407 wqe_count -= counter;
3408 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3409 }
3410
3411 spin_unlock_irqrestore(&nesqp->lock, flags);
3412
3413 out:
3414 if (err)
3415 *bad_wr = ib_wr;
3416 return err;
3417 }
3418
3419 /**
3420 * nes_drain_sq - drain sq
3421 * @ibqp: pointer to ibqp
3422 */
nes_drain_sq(struct ib_qp * ibqp)3423 static void nes_drain_sq(struct ib_qp *ibqp)
3424 {
3425 struct nes_qp *nesqp = to_nesqp(ibqp);
3426
3427 if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
3428 wait_for_completion(&nesqp->sq_drained);
3429 }
3430
3431 /**
3432 * nes_drain_rq - drain rq
3433 * @ibqp: pointer to ibqp
3434 */
nes_drain_rq(struct ib_qp * ibqp)3435 static void nes_drain_rq(struct ib_qp *ibqp)
3436 {
3437 struct nes_qp *nesqp = to_nesqp(ibqp);
3438
3439 if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
3440 wait_for_completion(&nesqp->rq_drained);
3441 }
3442
3443 /**
3444 * nes_poll_cq
3445 */
nes_poll_cq(struct ib_cq * ibcq,int num_entries,struct ib_wc * entry)3446 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3447 {
3448 u64 u64temp;
3449 u64 wrid;
3450 unsigned long flags = 0;
3451 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3452 struct nes_device *nesdev = nesvnic->nesdev;
3453 struct nes_cq *nescq = to_nescq(ibcq);
3454 struct nes_qp *nesqp;
3455 struct nes_hw_cqe cqe;
3456 u32 head;
3457 u32 wq_tail = 0;
3458 u32 cq_size;
3459 u32 cqe_count = 0;
3460 u32 wqe_index;
3461 u32 u32temp;
3462 u32 move_cq_head = 1;
3463 u32 err_code;
3464
3465 nes_debug(NES_DBG_CQ, "\n");
3466
3467 spin_lock_irqsave(&nescq->lock, flags);
3468
3469 head = nescq->hw_cq.cq_head;
3470 cq_size = nescq->hw_cq.cq_size;
3471
3472 while (cqe_count < num_entries) {
3473 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3474 NES_CQE_VALID) == 0)
3475 break;
3476
3477 /*
3478 * Make sure we read CQ entry contents *after*
3479 * we've checked the valid bit.
3480 */
3481 rmb();
3482
3483 cqe = nescq->hw_cq.cq_vbase[head];
3484 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3485 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3486 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3487 /* parse CQE, get completion context from WQE (either rq or sq) */
3488 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3489 ((u64)u32temp);
3490
3491 if (u64temp) {
3492 nesqp = (struct nes_qp *)(unsigned long)u64temp;
3493 memset(entry, 0, sizeof *entry);
3494 if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3495 entry->status = IB_WC_SUCCESS;
3496 } else {
3497 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3498 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3499 entry->status = err_code & 0x0000ffff;
3500
3501 /* The rest of the cqe's will be marked as flushed */
3502 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3503 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3504 NES_IWARP_CQE_MINOR_FLUSH);
3505 } else
3506 entry->status = IB_WC_WR_FLUSH_ERR;
3507 }
3508
3509 entry->qp = &nesqp->ibqp;
3510 entry->src_qp = nesqp->hwqp.qp_id;
3511
3512 if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3513 if (nesqp->skip_lsmm) {
3514 nesqp->skip_lsmm = 0;
3515 nesqp->hwqp.sq_tail++;
3516 }
3517
3518 /* Working on a SQ Completion*/
3519 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3520 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3521 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3522 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3523 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3524 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3525
3526 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3527 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3528 case NES_IWARP_SQ_OP_RDMAW:
3529 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3530 entry->opcode = IB_WC_RDMA_WRITE;
3531 break;
3532 case NES_IWARP_SQ_OP_RDMAR:
3533 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3534 entry->opcode = IB_WC_RDMA_READ;
3535 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3536 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3537 break;
3538 case NES_IWARP_SQ_OP_SENDINV:
3539 case NES_IWARP_SQ_OP_SENDSEINV:
3540 case NES_IWARP_SQ_OP_SEND:
3541 case NES_IWARP_SQ_OP_SENDSE:
3542 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3543 entry->opcode = IB_WC_SEND;
3544 break;
3545 case NES_IWARP_SQ_OP_LOCINV:
3546 entry->opcode = IB_WC_LOCAL_INV;
3547 break;
3548 case NES_IWARP_SQ_OP_FAST_REG:
3549 entry->opcode = IB_WC_REG_MR;
3550 break;
3551 }
3552
3553 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3554 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3555 move_cq_head = 0;
3556 wq_tail = nesqp->hwqp.sq_tail;
3557 }
3558 } else {
3559 /* Working on a RQ Completion*/
3560 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3561 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3562 ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3563 entry->opcode = IB_WC_RECV;
3564
3565 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3566 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3567 move_cq_head = 0;
3568 wq_tail = nesqp->hwqp.rq_tail;
3569 }
3570 }
3571
3572 if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
3573 if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
3574 complete(&nesqp->sq_drained);
3575 if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
3576 complete(&nesqp->rq_drained);
3577 }
3578
3579 entry->wr_id = wrid;
3580 entry++;
3581 cqe_count++;
3582 }
3583
3584 if (move_cq_head) {
3585 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3586 if (++head >= cq_size)
3587 head = 0;
3588 nescq->polled_completions++;
3589
3590 if ((nescq->polled_completions > (cq_size / 2)) ||
3591 (nescq->polled_completions == 255)) {
3592 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3593 " are pending %u of %u.\n",
3594 nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3595 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3596 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3597 nescq->polled_completions = 0;
3598 }
3599 } else {
3600 /* Update the wqe index and set status to flush */
3601 wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3602 wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3603 nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3604 cpu_to_le32(wqe_index);
3605 move_cq_head = 1; /* ready for next pass */
3606 }
3607 }
3608
3609 if (nescq->polled_completions) {
3610 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3611 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3612 nescq->polled_completions = 0;
3613 }
3614
3615 nescq->hw_cq.cq_head = head;
3616 nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3617 cqe_count, nescq->hw_cq.cq_number);
3618
3619 spin_unlock_irqrestore(&nescq->lock, flags);
3620
3621 return cqe_count;
3622 }
3623
3624
3625 /**
3626 * nes_req_notify_cq
3627 */
nes_req_notify_cq(struct ib_cq * ibcq,enum ib_cq_notify_flags notify_flags)3628 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3629 {
3630 struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3631 struct nes_device *nesdev = nesvnic->nesdev;
3632 struct nes_cq *nescq = to_nescq(ibcq);
3633 u32 cq_arm;
3634
3635 nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3636 nescq->hw_cq.cq_number);
3637
3638 cq_arm = nescq->hw_cq.cq_number;
3639 if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3640 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3641 else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3642 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3643 else
3644 return -EINVAL;
3645
3646 nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3647 nes_read32(nesdev->regs+NES_CQE_ALLOC);
3648
3649 return 0;
3650 }
3651
nes_port_immutable(struct ib_device * ibdev,u8 port_num,struct ib_port_immutable * immutable)3652 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3653 struct ib_port_immutable *immutable)
3654 {
3655 struct ib_port_attr attr;
3656 int err;
3657
3658 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3659
3660 err = nes_query_port(ibdev, port_num, &attr);
3661 if (err)
3662 return err;
3663
3664 immutable->pkey_tbl_len = attr.pkey_tbl_len;
3665 immutable->gid_tbl_len = attr.gid_tbl_len;
3666
3667 return 0;
3668 }
3669
get_dev_fw_str(struct ib_device * dev,char * str)3670 static void get_dev_fw_str(struct ib_device *dev, char *str)
3671 {
3672 struct nes_ib_device *nesibdev =
3673 container_of(dev, struct nes_ib_device, ibdev);
3674 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3675
3676 nes_debug(NES_DBG_INIT, "\n");
3677 snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u",
3678 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
3679 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
3680 }
3681
3682 /**
3683 * nes_init_ofa_device
3684 */
nes_init_ofa_device(struct net_device * netdev)3685 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3686 {
3687 struct nes_ib_device *nesibdev;
3688 struct nes_vnic *nesvnic = netdev_priv(netdev);
3689 struct nes_device *nesdev = nesvnic->nesdev;
3690
3691 nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3692 if (nesibdev == NULL) {
3693 return NULL;
3694 }
3695 strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3696 nesibdev->ibdev.owner = THIS_MODULE;
3697
3698 nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3699 memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3700 memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3701
3702 nesibdev->ibdev.uverbs_cmd_mask =
3703 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3704 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3705 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3706 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3707 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3708 (1ull << IB_USER_VERBS_CMD_REG_MR) |
3709 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3710 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3711 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3712 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3713 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3714 (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3715 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3716 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3717 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3718 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3719 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3720 (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3721 (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3722 (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3723 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3724 (1ull << IB_USER_VERBS_CMD_POST_SEND);
3725
3726 nesibdev->ibdev.phys_port_cnt = 1;
3727 nesibdev->ibdev.num_comp_vectors = 1;
3728 nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3729 nesibdev->ibdev.query_device = nes_query_device;
3730 nesibdev->ibdev.query_port = nes_query_port;
3731 nesibdev->ibdev.query_pkey = nes_query_pkey;
3732 nesibdev->ibdev.query_gid = nes_query_gid;
3733 nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3734 nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3735 nesibdev->ibdev.mmap = nes_mmap;
3736 nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3737 nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3738 nesibdev->ibdev.create_ah = nes_create_ah;
3739 nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3740 nesibdev->ibdev.create_qp = nes_create_qp;
3741 nesibdev->ibdev.modify_qp = nes_modify_qp;
3742 nesibdev->ibdev.query_qp = nes_query_qp;
3743 nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3744 nesibdev->ibdev.create_cq = nes_create_cq;
3745 nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3746 nesibdev->ibdev.poll_cq = nes_poll_cq;
3747 nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3748 nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3749 nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3750 nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3751 nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3752
3753 nesibdev->ibdev.alloc_mr = nes_alloc_mr;
3754 nesibdev->ibdev.map_mr_sg = nes_map_mr_sg;
3755
3756 nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3757 nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3758 nesibdev->ibdev.process_mad = nes_process_mad;
3759
3760 nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3761 nesibdev->ibdev.post_send = nes_post_send;
3762 nesibdev->ibdev.post_recv = nes_post_recv;
3763 nesibdev->ibdev.drain_sq = nes_drain_sq;
3764 nesibdev->ibdev.drain_rq = nes_drain_rq;
3765
3766 nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3767 if (nesibdev->ibdev.iwcm == NULL) {
3768 ib_dealloc_device(&nesibdev->ibdev);
3769 return NULL;
3770 }
3771 nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3772 nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3773 nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3774 nesibdev->ibdev.iwcm->connect = nes_connect;
3775 nesibdev->ibdev.iwcm->accept = nes_accept;
3776 nesibdev->ibdev.iwcm->reject = nes_reject;
3777 nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3778 nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3779 nesibdev->ibdev.get_port_immutable = nes_port_immutable;
3780 nesibdev->ibdev.get_dev_fw_str = get_dev_fw_str;
3781 memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3782 sizeof(nesibdev->ibdev.iwcm->ifname));
3783
3784 return nesibdev;
3785 }
3786
3787
3788 /**
3789 * nes_handle_delayed_event
3790 */
nes_handle_delayed_event(unsigned long data)3791 static void nes_handle_delayed_event(unsigned long data)
3792 {
3793 struct nes_vnic *nesvnic = (void *) data;
3794
3795 if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3796 struct ib_event event;
3797
3798 event.device = &nesvnic->nesibdev->ibdev;
3799 if (!event.device)
3800 goto stop_timer;
3801 event.event = nesvnic->delayed_event;
3802 event.element.port_num = nesvnic->logical_port + 1;
3803 ib_dispatch_event(&event);
3804 }
3805
3806 stop_timer:
3807 nesvnic->event_timer.function = NULL;
3808 }
3809
3810
nes_port_ibevent(struct nes_vnic * nesvnic)3811 void nes_port_ibevent(struct nes_vnic *nesvnic)
3812 {
3813 struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3814 struct nes_device *nesdev = nesvnic->nesdev;
3815 struct ib_event event;
3816 event.device = &nesibdev->ibdev;
3817 event.element.port_num = nesvnic->logical_port + 1;
3818 event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3819
3820 if (!nesvnic->event_timer.function) {
3821 ib_dispatch_event(&event);
3822 nesvnic->last_dispatched_event = event.event;
3823 nesvnic->event_timer.function = nes_handle_delayed_event;
3824 nesvnic->event_timer.data = (unsigned long) nesvnic;
3825 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3826 add_timer(&nesvnic->event_timer);
3827 } else {
3828 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3829 }
3830 nesvnic->delayed_event = event.event;
3831 }
3832
3833
3834 /**
3835 * nes_destroy_ofa_device
3836 */
nes_destroy_ofa_device(struct nes_ib_device * nesibdev)3837 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3838 {
3839 if (nesibdev == NULL)
3840 return;
3841
3842 nes_unregister_ofa_device(nesibdev);
3843
3844 kfree(nesibdev->ibdev.iwcm);
3845 ib_dealloc_device(&nesibdev->ibdev);
3846 }
3847
3848
3849 /**
3850 * nes_register_ofa_device
3851 */
nes_register_ofa_device(struct nes_ib_device * nesibdev)3852 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3853 {
3854 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3855 struct nes_device *nesdev = nesvnic->nesdev;
3856 struct nes_adapter *nesadapter = nesdev->nesadapter;
3857 int i, ret;
3858
3859 ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
3860 if (ret) {
3861 return ret;
3862 }
3863
3864 /* Get the resources allocated to this device */
3865 nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3866 nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3867 nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3868 nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3869
3870 for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3871 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3872 if (ret) {
3873 while (i > 0) {
3874 i--;
3875 device_remove_file(&nesibdev->ibdev.dev,
3876 nes_dev_attributes[i]);
3877 }
3878 ib_unregister_device(&nesibdev->ibdev);
3879 return ret;
3880 }
3881 }
3882
3883 nesvnic->of_device_registered = 1;
3884
3885 return 0;
3886 }
3887
3888
3889 /**
3890 * nes_unregister_ofa_device
3891 */
nes_unregister_ofa_device(struct nes_ib_device * nesibdev)3892 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3893 {
3894 struct nes_vnic *nesvnic = nesibdev->nesvnic;
3895 int i;
3896
3897 for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3898 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3899 }
3900
3901 if (nesvnic->of_device_registered) {
3902 ib_unregister_device(&nesibdev->ibdev);
3903 }
3904
3905 nesvnic->of_device_registered = 0;
3906 }
3907