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   1 /*
   2  * Copyright (c) 2006 - 2009 Intel-NE, Inc.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/random.h>
  37 #include <linux/highmem.h>
  38 #include <asm/byteorder.h>
  39
  40 #include <rdma/ib_verbs.h>
  41 #include <rdma/iw_cm.h>
  42 #include <rdma/ib_user_verbs.h>
  43
  44 #include "nes.h"
  45
  46 #include <rdma/ib_umem.h>
  47
  48 atomic_t mod_qp_timouts;
  49 atomic_t qps_created;
  50 atomic_t sw_qps_destroyed;
  51
  52 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
  53
  54 /**
  55  * nes_alloc_mw
  56  */
  57 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd) {
  58         struct nes_pd *nespd = to_nespd(ibpd);
  59         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
  60         struct nes_device *nesdev = nesvnic->nesdev;
  61         struct nes_adapter *nesadapter = nesdev->nesadapter;
  62         struct nes_cqp_request *cqp_request;
  63         struct nes_mr *nesmr;
  64         struct ib_mw *ibmw;
  65         struct nes_hw_cqp_wqe *cqp_wqe;
  66         int ret;
  67         u32 stag;
  68         u32 stag_index = 0;
  69         u32 next_stag_index = 0;
  70         u32 driver_key = 0;
  71         u8 stag_key = 0;
  72
  73         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
  74         stag_key = (u8)next_stag_index;
  75
  76         driver_key = 0;
  77
  78         next_stag_index >>= 8;
  79         next_stag_index %= nesadapter->max_mr;
  80
  81         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
  82                         nesadapter->max_mr, &stag_index, &next_stag_index);
  83         if (ret) {
  84                 return ERR_PTR(ret);
  85         }
  86
  87         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
  88         if (!nesmr) {
  89                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
  90                 return ERR_PTR(-ENOMEM);
  91         }
  92
  93         stag = stag_index << 8;
  94         stag |= driver_key;
  95         stag += (u32)stag_key;
  96
  97         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
  98                         stag, stag_index);
  99
 100         /* Register the region with the adapter */
 101         cqp_request = nes_get_cqp_request(nesdev);
 102         if (cqp_request == NULL) {
 103                 kfree(nesmr);
 104                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 105                 return ERR_PTR(-ENOMEM);
 106         }
 107
 108         cqp_request->waiting = 1;
 109         cqp_wqe = &cqp_request->cqp_wqe;
 110
 111         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
 112                         cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
 113                         NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
 114                         NES_CQP_STAG_REM_ACC_EN);
 115
 116         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 117         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
 118         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 119
 120         atomic_set(&cqp_request->refcount, 2);
 121         nes_post_cqp_request(nesdev, cqp_request);
 122
 123         /* Wait for CQP */
 124         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
 125                         NES_EVENT_TIMEOUT);
 126         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
 127                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 128                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
 129         if ((!ret) || (cqp_request->major_code)) {
 130                 nes_put_cqp_request(nesdev, cqp_request);
 131                 kfree(nesmr);
 132                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 133                 if (!ret) {
 134                         return ERR_PTR(-ETIME);
 135                 } else {
 136                         return ERR_PTR(-ENOMEM);
 137                 }
 138         }
 139         nes_put_cqp_request(nesdev, cqp_request);
 140
 141         nesmr->ibmw.rkey = stag;
 142         nesmr->mode = IWNES_MEMREG_TYPE_MW;
 143         ibmw = &nesmr->ibmw;
 144         nesmr->pbl_4k = 0;
 145         nesmr->pbls_used = 0;
 146
 147         return ibmw;
 148 }
 149
 150
 151 /**
 152  * nes_dealloc_mw
 153  */
 154 static int nes_dealloc_mw(struct ib_mw *ibmw)
 155 {
 156         struct nes_mr *nesmr = to_nesmw(ibmw);
 157         struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
 158         struct nes_device *nesdev = nesvnic->nesdev;
 159         struct nes_adapter *nesadapter = nesdev->nesadapter;
 160         struct nes_hw_cqp_wqe *cqp_wqe;
 161         struct nes_cqp_request *cqp_request;
 162         int err = 0;
 163         int ret;
 164
 165         /* Deallocate the window with the adapter */
 166         cqp_request = nes_get_cqp_request(nesdev);
 167         if (cqp_request == NULL) {
 168                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 169                 return -ENOMEM;
 170         }
 171         cqp_request->waiting = 1;
 172         cqp_wqe = &cqp_request->cqp_wqe;
 173         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 174         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
 175         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
 176
 177         atomic_set(&cqp_request->refcount, 2);
 178         nes_post_cqp_request(nesdev, cqp_request);
 179
 180         /* Wait for CQP */
 181         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
 182                         ibmw->rkey);
 183         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
 184                         NES_EVENT_TIMEOUT);
 185         nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
 186                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 187                         ret, cqp_request->major_code, cqp_request->minor_code);
 188         if (!ret)
 189                 err = -ETIME;
 190         else if (cqp_request->major_code)
 191                 err = -EIO;
 192
 193         nes_put_cqp_request(nesdev, cqp_request);
 194
 195         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
 196                         (ibmw->rkey & 0x0fffff00) >> 8);
 197         kfree(nesmr);
 198
 199         return err;
 200 }
 201
 202
 203 /**
 204  * nes_bind_mw
 205  */
 206 static int nes_bind_mw(struct ib_qp *ibqp, struct ib_mw *ibmw,
 207                 struct ib_mw_bind *ibmw_bind)
 208 {
 209         u64 u64temp;
 210         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
 211         struct nes_device *nesdev = nesvnic->nesdev;
 212         /* struct nes_mr *nesmr = to_nesmw(ibmw); */
 213         struct nes_qp *nesqp = to_nesqp(ibqp);
 214         struct nes_hw_qp_wqe *wqe;
 215         unsigned long flags = 0;
 216         u32 head;
 217         u32 wqe_misc = 0;
 218         u32 qsize;
 219
 220         if (nesqp->ibqp_state > IB_QPS_RTS)
 221                 return -EINVAL;
 222
 223         spin_lock_irqsave(&nesqp->lock, flags);
 224
 225         head = nesqp->hwqp.sq_head;
 226         qsize = nesqp->hwqp.sq_tail;
 227
 228         /* Check for SQ overflow */
 229         if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
 230                 spin_unlock_irqrestore(&nesqp->lock, flags);
 231                 return -EINVAL;
 232         }
 233
 234         wqe = &nesqp->hwqp.sq_vbase[head];
 235         /* nes_debug(NES_DBG_MR, "processing sq wqe at %p, head = %u.\n", wqe, head); */
 236         nes_fill_init_qp_wqe(wqe, nesqp, head);
 237         u64temp = ibmw_bind->wr_id;
 238         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX, u64temp);
 239         wqe_misc = NES_IWARP_SQ_OP_BIND;
 240
 241         wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
 242
 243         if (ibmw_bind->send_flags & IB_SEND_SIGNALED)
 244                 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
 245
 246         if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_WRITE) {
 247                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE;
 248         }
 249         if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_READ) {
 250                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_READ;
 251         }
 252
 253         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_MISC_IDX, wqe_misc);
 254         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MR_IDX, ibmw_bind->mr->lkey);
 255         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MW_IDX, ibmw->rkey);
 256         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_LENGTH_LOW_IDX,
 257                         ibmw_bind->length);
 258         wqe->wqe_words[NES_IWARP_SQ_BIND_WQE_LENGTH_HIGH_IDX] = 0;
 259         u64temp = (u64)ibmw_bind->addr;
 260         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_VA_FBO_LOW_IDX, u64temp);
 261
 262         head++;
 263         if (head >= qsize)
 264                 head = 0;
 265
 266         nesqp->hwqp.sq_head = head;
 267         barrier();
 268
 269         nes_write32(nesdev->regs+NES_WQE_ALLOC,
 270                         (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
 271
 272         spin_unlock_irqrestore(&nesqp->lock, flags);
 273
 274         return 0;
 275 }
 276
 277
 278 /*
 279  * nes_alloc_fast_mr
 280  */
 281 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
 282                              u32 stag, u32 page_count)
 283 {
 284         struct nes_hw_cqp_wqe *cqp_wqe;
 285         struct nes_cqp_request *cqp_request;
 286         unsigned long flags;
 287         int ret;
 288         struct nes_adapter *nesadapter = nesdev->nesadapter;
 289         u32 opcode = 0;
 290         u16 major_code;
 291         u64 region_length = page_count * PAGE_SIZE;
 292
 293
 294         cqp_request = nes_get_cqp_request(nesdev);
 295         if (cqp_request == NULL) {
 296                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 297                 return -ENOMEM;
 298         }
 299         nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
 300                               "region_length = %llu\n",
 301                               page_count, region_length);
 302         cqp_request->waiting = 1;
 303         cqp_wqe = &cqp_request->cqp_wqe;
 304
 305         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 306         if (nesadapter->free_4kpbl > 0) {
 307                 nesadapter->free_4kpbl--;
 308                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 309         } else {
 310                 /* No 4kpbl's available: */
 311                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 312                 nes_debug(NES_DBG_MR, "Out of Pbls\n");
 313                 nes_free_cqp_request(nesdev, cqp_request);
 314                 return -ENOMEM;
 315         }
 316
 317         opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
 318                  NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
 319                  NES_CQP_STAG_REM_ACC_EN;
 320         /*
 321          * The current OFED API does not support the zero based TO option.
 322          * If added then need to changed the NES_CQP_STAG_VA* option.  Also,
 323          * the API does not support that ability to have the MR set for local
 324          * access only when created and not allow the SQ op to override. Given
 325          * this the remote enable must be set here.
 326          */
 327
 328         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 329         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 330         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
 331
 332         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
 333                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
 334         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
 335                         cpu_to_le32(nespd->pd_id & 0x00007fff);
 336
 337         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 338         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
 339         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
 340         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
 341         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
 342         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
 343         barrier();
 344
 345         atomic_set(&cqp_request->refcount, 2);
 346         nes_post_cqp_request(nesdev, cqp_request);
 347
 348         /* Wait for CQP */
 349         ret = wait_event_timeout(cqp_request->waitq,
 350                                  (0 != cqp_request->request_done),
 351                                  NES_EVENT_TIMEOUT);
 352
 353         nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
 354                   "wait_event_timeout ret = %u, CQP Major:Minor codes = "
 355                   "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
 356                   cqp_request->minor_code);
 357         major_code = cqp_request->major_code;
 358         nes_put_cqp_request(nesdev, cqp_request);
 359
 360         if (!ret || major_code) {
 361                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 362                 nesadapter->free_4kpbl++;
 363                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 364         }
 365
 366         if (!ret)
 367                 return -ETIME;
 368         else if (major_code)
 369                 return -EIO;
 370         return 0;
 371 }
 372
 373 /*
 374  * nes_alloc_fast_reg_mr
 375  */
 376 struct ib_mr *nes_alloc_fast_reg_mr(struct ib_pd *ibpd, int max_page_list_len)
 377 {
 378         struct nes_pd *nespd = to_nespd(ibpd);
 379         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 380         struct nes_device *nesdev = nesvnic->nesdev;
 381         struct nes_adapter *nesadapter = nesdev->nesadapter;
 382
 383         u32 next_stag_index;
 384         u8 stag_key = 0;
 385         u32 driver_key = 0;
 386         int err = 0;
 387         u32 stag_index = 0;
 388         struct nes_mr *nesmr;
 389         u32 stag;
 390         int ret;
 391         struct ib_mr *ibmr;
 392 /*
 393  * Note:  Set to always use a fixed length single page entry PBL.  This is to allow
 394  *       for the fast_reg_mr operation to always know the size of the PBL.
 395  */
 396         if (max_page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 397                 return ERR_PTR(-E2BIG);
 398
 399         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
 400         stag_key = (u8)next_stag_index;
 401         next_stag_index >>= 8;
 402         next_stag_index %= nesadapter->max_mr;
 403
 404         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
 405                                  nesadapter->max_mr, &stag_index,
 406                                  &next_stag_index);
 407         if (err)
 408                 return ERR_PTR(err);
 409
 410         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
 411         if (!nesmr) {
 412                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 413                 return ERR_PTR(-ENOMEM);
 414         }
 415
 416         stag = stag_index << 8;
 417         stag |= driver_key;
 418         stag += (u32)stag_key;
 419
 420         nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
 421                   stag, stag_index);
 422
 423         ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_page_list_len);
 424
 425         if (ret == 0) {
 426                 nesmr->ibmr.rkey = stag;
 427                 nesmr->ibmr.lkey = stag;
 428                 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
 429                 ibmr = &nesmr->ibmr;
 430         } else {
 431                 kfree(nesmr);
 432                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 433                 ibmr = ERR_PTR(-ENOMEM);
 434         }
 435         return ibmr;
 436 }
 437
 438 /*
 439  * nes_alloc_fast_reg_page_list
 440  */
 441 static struct ib_fast_reg_page_list *nes_alloc_fast_reg_page_list(
 442                                                         struct ib_device *ibdev,
 443                                                         int page_list_len)
 444 {
 445         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 446         struct nes_device *nesdev = nesvnic->nesdev;
 447         struct ib_fast_reg_page_list *pifrpl;
 448         struct nes_ib_fast_reg_page_list *pnesfrpl;
 449
 450         if (page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 451                 return ERR_PTR(-E2BIG);
 452         /*
 453          * Allocate the ib_fast_reg_page_list structure, the
 454          * nes_fast_bpl structure, and the PLB table.
 455          */
 456         pnesfrpl = kmalloc(sizeof(struct nes_ib_fast_reg_page_list) +
 457                            page_list_len * sizeof(u64), GFP_KERNEL);
 458
 459         if (!pnesfrpl)
 460                 return ERR_PTR(-ENOMEM);
 461
 462         pifrpl = &pnesfrpl->ibfrpl;
 463         pifrpl->page_list = &pnesfrpl->pbl;
 464         pifrpl->max_page_list_len = page_list_len;
 465         /*
 466          * Allocate the WQE PBL
 467          */
 468         pnesfrpl->nes_wqe_pbl.kva = pci_alloc_consistent(nesdev->pcidev,
 469                                                          page_list_len * sizeof(u64),
 470                                                          &pnesfrpl->nes_wqe_pbl.paddr);
 471
 472         if (!pnesfrpl->nes_wqe_pbl.kva) {
 473                 kfree(pnesfrpl);
 474                 return ERR_PTR(-ENOMEM);
 475         }
 476         nes_debug(NES_DBG_MR, "nes_alloc_fast_reg_pbl: nes_frpl = %p, "
 477                   "ibfrpl = %p, ibfrpl.page_list = %p, pbl.kva = %p, "
 478                   "pbl.paddr= %p\n", pnesfrpl, &pnesfrpl->ibfrpl,
 479                   pnesfrpl->ibfrpl.page_list, pnesfrpl->nes_wqe_pbl.kva,
 480                   (void *)pnesfrpl->nes_wqe_pbl.paddr);
 481
 482         return pifrpl;
 483 }
 484
 485 /*
 486  * nes_free_fast_reg_page_list
 487  */
 488 static void nes_free_fast_reg_page_list(struct ib_fast_reg_page_list *pifrpl)
 489 {
 490         struct nes_vnic *nesvnic = to_nesvnic(pifrpl->device);
 491         struct nes_device *nesdev = nesvnic->nesdev;
 492         struct nes_ib_fast_reg_page_list *pnesfrpl;
 493
 494         pnesfrpl = container_of(pifrpl, struct nes_ib_fast_reg_page_list, ibfrpl);
 495         /*
 496          * Free the WQE PBL.
 497          */
 498         pci_free_consistent(nesdev->pcidev,
 499                             pifrpl->max_page_list_len * sizeof(u64),
 500                             pnesfrpl->nes_wqe_pbl.kva,
 501                             pnesfrpl->nes_wqe_pbl.paddr);
 502         /*
 503          * Free the PBL structure
 504          */
 505         kfree(pnesfrpl);
 506 }
 507
 508 /**
 509  * nes_query_device
 510  */
 511 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 512 {
 513         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 514         struct nes_device *nesdev = nesvnic->nesdev;
 515         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 516
 517         memset(props, 0, sizeof(*props));
 518         memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
 519
 520         props->fw_ver = nesdev->nesadapter->fw_ver;
 521         props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
 522         props->vendor_id = nesdev->nesadapter->vendor_id;
 523         props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
 524         props->hw_ver = nesdev->nesadapter->hw_rev;
 525         props->max_mr_size = 0x80000000;
 526         props->max_qp = nesibdev->max_qp;
 527         props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 528         props->max_sge = nesdev->nesadapter->max_sge;
 529         props->max_cq = nesibdev->max_cq;
 530         props->max_cqe = nesdev->nesadapter->max_cqe - 1;
 531         props->max_mr = nesibdev->max_mr;
 532         props->max_mw = nesibdev->max_mr;
 533         props->max_pd = nesibdev->max_pd;
 534         props->max_sge_rd = 1;
 535         switch (nesdev->nesadapter->max_irrq_wr) {
 536                 case 0:
 537                         props->max_qp_rd_atom = 1;
 538                         break;
 539                 case 1:
 540                         props->max_qp_rd_atom = 4;
 541                         break;
 542                 case 2:
 543                         props->max_qp_rd_atom = 16;
 544                         break;
 545                 case 3:
 546                         props->max_qp_rd_atom = 32;
 547                         break;
 548                 default:
 549                         props->max_qp_rd_atom = 0;
 550         }
 551         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 552         props->atomic_cap = IB_ATOMIC_NONE;
 553         props->max_map_per_fmr = 1;
 554
 555         return 0;
 556 }
 557
 558
 559 /**
 560  * nes_query_port
 561  */
 562 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 563 {
 564         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 565         struct net_device *netdev = nesvnic->netdev;
 566
 567         memset(props, 0, sizeof(*props));
 568
 569         props->max_mtu = IB_MTU_4096;
 570
 571         if (netdev->mtu  >= 4096)
 572                 props->active_mtu = IB_MTU_4096;
 573         else if (netdev->mtu  >= 2048)
 574                 props->active_mtu = IB_MTU_2048;
 575         else if (netdev->mtu  >= 1024)
 576                 props->active_mtu = IB_MTU_1024;
 577         else if (netdev->mtu  >= 512)
 578                 props->active_mtu = IB_MTU_512;
 579         else
 580                 props->active_mtu = IB_MTU_256;
 581
 582         props->lid = 1;
 583         props->lmc = 0;
 584         props->sm_lid = 0;
 585         props->sm_sl = 0;
 586         if (nesvnic->linkup)
 587                 props->state = IB_PORT_ACTIVE;
 588         else
 589                 props->state = IB_PORT_DOWN;
 590         props->phys_state = 0;
 591         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 592                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 593         props->gid_tbl_len = 1;
 594         props->pkey_tbl_len = 1;
 595         props->qkey_viol_cntr = 0;
 596         props->active_width = IB_WIDTH_4X;
 597         props->active_speed = 1;
 598         props->max_msg_sz = 0x80000000;
 599
 600         return 0;
 601 }
 602
 603
 604 /**
 605  * nes_modify_port
 606  */
 607 static int nes_modify_port(struct ib_device *ibdev, u8 port,
 608                 int port_modify_mask, struct ib_port_modify *props)
 609 {
 610         return 0;
 611 }
 612
 613
 614 /**
 615  * nes_query_pkey
 616  */
 617 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 618 {
 619         *pkey = 0;
 620         return 0;
 621 }
 622
 623
 624 /**
 625  * nes_query_gid
 626  */
 627 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 628                 int index, union ib_gid *gid)
 629 {
 630         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 631
 632         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 633         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 634
 635         return 0;
 636 }
 637
 638
 639 /**
 640  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 641  * of all objects associated with a particular user-mode client.
 642  */
 643 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 644                 struct ib_udata *udata)
 645 {
 646         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 647         struct nes_device *nesdev = nesvnic->nesdev;
 648         struct nes_adapter *nesadapter = nesdev->nesadapter;
 649         struct nes_alloc_ucontext_req req;
 650         struct nes_alloc_ucontext_resp uresp;
 651         struct nes_ucontext *nes_ucontext;
 652         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 653
 654
 655         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 656                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 657                 return ERR_PTR(-EINVAL);
 658         }
 659
 660         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 661                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 662                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 663                 return ERR_PTR(-EINVAL);
 664         }
 665
 666
 667         memset(&uresp, 0, sizeof uresp);
 668
 669         uresp.max_qps = nesibdev->max_qp;
 670         uresp.max_pds = nesibdev->max_pd;
 671         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 672         uresp.virtwq = nesadapter->virtwq;
 673         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 674
 675         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 676         if (!nes_ucontext)
 677                 return ERR_PTR(-ENOMEM);
 678
 679         nes_ucontext->nesdev = nesdev;
 680         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 681         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 682                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 683                         PAGE_SIZE;
 684
 685
 686         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 687                 kfree(nes_ucontext);
 688                 return ERR_PTR(-EFAULT);
 689         }
 690
 691         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 692         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 693         atomic_set(&nes_ucontext->usecnt, 1);
 694         return &nes_ucontext->ibucontext;
 695 }
 696
 697
 698 /**
 699  * nes_dealloc_ucontext
 700  */
 701 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 702 {
 703         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 704         /* struct nes_device *nesdev = nesvnic->nesdev; */
 705         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 706
 707         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 708           return 0;
 709         kfree(nes_ucontext);
 710         return 0;
 711 }
 712
 713
 714 /**
 715  * nes_mmap
 716  */
 717 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 718 {
 719         unsigned long index;
 720         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 721         struct nes_device *nesdev = nesvnic->nesdev;
 722         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 723         struct nes_ucontext *nes_ucontext;
 724         struct nes_qp *nesqp;
 725
 726         nes_ucontext = to_nesucontext(context);
 727
 728
 729         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 730                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 731                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 732                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 733                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 734                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 735                         return -EFAULT;
 736                 }
 737                 nesqp = nes_ucontext->mmap_nesqp[index];
 738                 if (nesqp == NULL) {
 739                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 740                         return -EFAULT;
 741                 }
 742                 if (remap_pfn_range(vma, vma->vm_start,
 743                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 744                                 vma->vm_end - vma->vm_start,
 745                                 vma->vm_page_prot)) {
 746                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 747                         return -EAGAIN;
 748                 }
 749                 vma->vm_private_data = nesqp;
 750                 return 0;
 751         } else {
 752                 index = vma->vm_pgoff;
 753                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 754                         return -EFAULT;
 755
 756                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 757                 if (io_remap_pfn_range(vma, vma->vm_start,
 758                                 (nesdev->doorbell_start +
 759                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 760                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 761                         return -EAGAIN;
 762                 vma->vm_private_data = nes_ucontext;
 763                 return 0;
 764         }
 765
 766         return -ENOSYS;
 767 }
 768
 769
 770 /**
 771  * nes_alloc_pd
 772  */
 773 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 774                 struct ib_ucontext *context, struct ib_udata *udata)
 775 {
 776         struct nes_pd *nespd;
 777         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 778         struct nes_device *nesdev = nesvnic->nesdev;
 779         struct nes_adapter *nesadapter = nesdev->nesadapter;
 780         struct nes_ucontext *nesucontext;
 781         struct nes_alloc_pd_resp uresp;
 782         u32 pd_num = 0;
 783         int err;
 784
 785         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 786                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 787                         atomic_read(&nesvnic->netdev->refcnt));
 788
 789         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 790                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd);
 791         if (err) {
 792                 return ERR_PTR(err);
 793         }
 794
 795         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 796         if (!nespd) {
 797                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 798                 return ERR_PTR(-ENOMEM);
 799         }
 800
 801         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 802                         nespd, nesvnic->nesibdev->ibdev.name);
 803
 804         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 805
 806         if (context) {
 807                 nesucontext = to_nesucontext(context);
 808                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 809                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 810                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 811                                 nespd->mmap_db_index, nespd->pd_id);
 812                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 813                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 814                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 815                         kfree(nespd);
 816                         return ERR_PTR(-ENOMEM);
 817                 }
 818
 819                 uresp.pd_id = nespd->pd_id;
 820                 uresp.mmap_db_index = nespd->mmap_db_index;
 821                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 822                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 823                         kfree(nespd);
 824                         return ERR_PTR(-EFAULT);
 825                 }
 826
 827                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 828                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 829                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 830         }
 831
 832         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 833         return &nespd->ibpd;
 834 }
 835
 836
 837 /**
 838  * nes_dealloc_pd
 839  */
 840 static int nes_dealloc_pd(struct ib_pd *ibpd)
 841 {
 842         struct nes_ucontext *nesucontext;
 843         struct nes_pd *nespd = to_nespd(ibpd);
 844         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 845         struct nes_device *nesdev = nesvnic->nesdev;
 846         struct nes_adapter *nesadapter = nesdev->nesadapter;
 847
 848         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 849                 nesucontext = to_nesucontext(ibpd->uobject->context);
 850                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 851                                 nespd->mmap_db_index);
 852                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 853                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 854                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 855                         nesucontext->first_free_db = nespd->mmap_db_index;
 856                 }
 857         }
 858
 859         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 860                         nespd->pd_id, nespd);
 861         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 862                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 863         kfree(nespd);
 864
 865         return 0;
 866 }
 867
 868
 869 /**
 870  * nes_create_ah
 871  */
 872 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 873 {
 874         return ERR_PTR(-ENOSYS);
 875 }
 876
 877
 878 /**
 879  * nes_destroy_ah
 880  */
 881 static int nes_destroy_ah(struct ib_ah *ah)
 882 {
 883         return -ENOSYS;
 884 }
 885
 886
 887 /**
 888  * nes_get_encoded_size
 889  */
 890 static inline u8 nes_get_encoded_size(int *size)
 891 {
 892         u8 encoded_size = 0;
 893         if (*size <= 32) {
 894                 *size = 32;
 895                 encoded_size = 1;
 896         } else if (*size <= 128) {
 897                 *size = 128;
 898                 encoded_size = 2;
 899         } else if (*size <= 512) {
 900                 *size = 512;
 901                 encoded_size = 3;
 902         }
 903         return (encoded_size);
 904 }
 905
 906
 907
 908 /**
 909  * nes_setup_virt_qp
 910  */
 911 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 912                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 913 {
 914         unsigned long flags;
 915         void *mem;
 916         __le64 *pbl = NULL;
 917         __le64 *tpbl;
 918         __le64 *pblbuffer;
 919         struct nes_device *nesdev = nesvnic->nesdev;
 920         struct nes_adapter *nesadapter = nesdev->nesadapter;
 921         u32 pbl_entries;
 922         u8 rq_pbl_entries;
 923         u8 sq_pbl_entries;
 924
 925         pbl_entries = nespbl->pbl_size >> 3;
 926         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 927                         nespbl->pbl_size, pbl_entries,
 928                         (void *)nespbl->pbl_vbase,
 929                         (unsigned long) nespbl->pbl_pbase);
 930         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 931         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 932         /* the first pbl to be fro the rq_vbase... */
 933         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 934         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 935         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 936         if (!nespbl->page) {
 937                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 938                 kfree(nespbl);
 939                 return -ENOMEM;
 940         }
 941
 942         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 943         nesqp->page = nespbl->page;
 944         if (!nesqp->hwqp.sq_vbase) {
 945                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 946                 kfree(nespbl);
 947                 return -ENOMEM;
 948         }
 949
 950         /* Now to get to sq.. we need to calculate how many */
 951         /* PBL entries were used by the rq.. */
 952         pbl += sq_pbl_entries;
 953         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 954         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 955         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 956
 957         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 958                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 959                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 960         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 961         if (!nesadapter->free_256pbl) {
 962                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 963                                 nespbl->pbl_pbase);
 964                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 965                 kunmap(nesqp->page);
 966                 kfree(nespbl);
 967                 return -ENOMEM;
 968         }
 969         nesadapter->free_256pbl--;
 970         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 971
 972         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 973         pblbuffer = nesqp->pbl_vbase;
 974         if (!nesqp->pbl_vbase) {
 975                 /* memory allocated during nes_reg_user_mr() */
 976                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 977                                     nespbl->pbl_pbase);
 978                 kfree(nespbl);
 979                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 980                 nesadapter->free_256pbl++;
 981                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 982                 kunmap(nesqp->page);
 983                 return -ENOMEM;
 984         }
 985         memset(nesqp->pbl_vbase, 0, 256);
 986         /* fill in the page address in the pbl buffer.. */
 987         tpbl = pblbuffer + 16;
 988         pbl = (__le64 *)nespbl->pbl_vbase;
 989         while (sq_pbl_entries--)
 990                 *tpbl++ = *pbl++;
 991         tpbl = pblbuffer;
 992         while (rq_pbl_entries--)
 993                 *tpbl++ = *pbl++;
 994
 995         /* done with memory allocated during nes_reg_user_mr() */
 996         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 997                             nespbl->pbl_pbase);
 998         kfree(nespbl);
 999
1000         nesqp->qp_mem_size =
1001                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
1002         /* Round up to a multiple of a page */
1003         nesqp->qp_mem_size += PAGE_SIZE - 1;
1004         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1005
1006         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1007                         &nesqp->hwqp.q2_pbase);
1008
1009         if (!mem) {
1010                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
1011                 nesqp->pbl_vbase = NULL;
1012                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1013                 nesadapter->free_256pbl++;
1014                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1015                 kunmap(nesqp->page);
1016                 return -ENOMEM;
1017         }
1018         nesqp->hwqp.q2_vbase = mem;
1019         mem += 256;
1020         memset(nesqp->hwqp.q2_vbase, 0, 256);
1021         nesqp->nesqp_context = mem;
1022         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1023         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1024
1025         return 0;
1026 }
1027
1028
1029 /**
1030  * nes_setup_mmap_qp
1031  */
1032 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
1033                 int sq_size, int rq_size)
1034 {
1035         void *mem;
1036         struct nes_device *nesdev = nesvnic->nesdev;
1037
1038         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
1039                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
1040                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
1041                         256; /* this is Q2 */
1042         /* Round up to a multiple of a page */
1043         nesqp->qp_mem_size += PAGE_SIZE - 1;
1044         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1045
1046         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1047                         &nesqp->hwqp.sq_pbase);
1048         if (!mem)
1049                 return -ENOMEM;
1050         nes_debug(NES_DBG_QP, "PCI consistent memory for "
1051                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
1052                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
1053
1054         memset(mem, 0, nesqp->qp_mem_size);
1055
1056         nesqp->hwqp.sq_vbase = mem;
1057         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
1058
1059         nesqp->hwqp.rq_vbase = mem;
1060         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
1061                         sizeof(struct nes_hw_qp_wqe) * sq_size;
1062         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
1063
1064         nesqp->hwqp.q2_vbase = mem;
1065         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
1066                         sizeof(struct nes_hw_qp_wqe) * rq_size;
1067         mem += 256;
1068         memset(nesqp->hwqp.q2_vbase, 0, 256);
1069
1070         nesqp->nesqp_context = mem;
1071         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1072         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1073         return 0;
1074 }
1075
1076
1077 /**
1078  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
1079  */
1080 static inline void nes_free_qp_mem(struct nes_device *nesdev,
1081                 struct nes_qp *nesqp, int virt_wqs)
1082 {
1083         unsigned long flags;
1084         struct nes_adapter *nesadapter = nesdev->nesadapter;
1085         if (!virt_wqs) {
1086                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1087                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
1088         }else {
1089                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1090                 nesadapter->free_256pbl++;
1091                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1092                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
1093                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
1094                 nesqp->pbl_vbase = NULL;
1095                 kunmap(nesqp->page);
1096         }
1097 }
1098
1099
1100 /**
1101  * nes_create_qp
1102  */
1103 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1104                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1105 {
1106         u64 u64temp= 0;
1107         u64 u64nesqp = 0;
1108         struct nes_pd *nespd = to_nespd(ibpd);
1109         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1110         struct nes_device *nesdev = nesvnic->nesdev;
1111         struct nes_adapter *nesadapter = nesdev->nesadapter;
1112         struct nes_qp *nesqp;
1113         struct nes_cq *nescq;
1114         struct nes_ucontext *nes_ucontext;
1115         struct nes_hw_cqp_wqe *cqp_wqe;
1116         struct nes_cqp_request *cqp_request;
1117         struct nes_create_qp_req req;
1118         struct nes_create_qp_resp uresp;
1119         struct nes_pbl  *nespbl = NULL;
1120         u32 qp_num = 0;
1121         u32 opcode = 0;
1122         /* u32 counter = 0; */
1123         void *mem;
1124         unsigned long flags;
1125         int ret;
1126         int err;
1127         int virt_wqs = 0;
1128         int sq_size;
1129         int rq_size;
1130         u8 sq_encoded_size;
1131         u8 rq_encoded_size;
1132         /* int counter; */
1133
1134         if (init_attr->create_flags)
1135                 return ERR_PTR(-EINVAL);
1136
1137         atomic_inc(&qps_created);
1138         switch (init_attr->qp_type) {
1139                 case IB_QPT_RC:
1140                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1141                                 init_attr->cap.max_inline_data = 0;
1142                         } else {
1143                                 init_attr->cap.max_inline_data = 64;
1144                         }
1145                         sq_size = init_attr->cap.max_send_wr;
1146                         rq_size = init_attr->cap.max_recv_wr;
1147
1148                         /* check if the encoded sizes are OK or not... */
1149                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1150                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1151
1152                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1153                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1154                                                 rq_size, sq_size);
1155                                 return ERR_PTR(-EINVAL);
1156                         }
1157
1158                         init_attr->cap.max_send_wr = sq_size -2;
1159                         init_attr->cap.max_recv_wr = rq_size -1;
1160                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1161
1162                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1163                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp);
1164                         if (ret) {
1165                                 return ERR_PTR(ret);
1166                         }
1167
1168                         /* Need 512 (actually now 1024) byte alignment on this structure */
1169                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1170                         if (!mem) {
1171                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1172                                 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1173                                 return ERR_PTR(-ENOMEM);
1174                         }
1175                         u64nesqp = (unsigned long)mem;
1176                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1177                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1178                         u64nesqp &= ~u64temp;
1179                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1180                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1181                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1182                         nesqp->allocated_buffer = mem;
1183
1184                         if (udata) {
1185                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1186                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1187                                         kfree(nesqp->allocated_buffer);
1188                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1189                                         return NULL;
1190                                 }
1191                                 if (req.user_wqe_buffers) {
1192                                         virt_wqs = 1;
1193                                 }
1194                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1195                                         nesqp->user_mode = 1;
1196                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1197                                         if (virt_wqs) {
1198                                                 err = 1;
1199                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1200                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1201                                                                 list_del(&nespbl->list);
1202                                                                 err = 0;
1203                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1204                                                                           nespbl, nespbl->user_base);
1205                                                                 break;
1206                                                         }
1207                                                 }
1208                                                 if (err) {
1209                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1210                                                                   (long long unsigned int)req.user_wqe_buffers);
1211                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1212                                                         kfree(nesqp->allocated_buffer);
1213                                                         return ERR_PTR(-EFAULT);
1214                                                 }
1215                                         }
1216
1217                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1218                                         nesqp->mmap_sq_db_index =
1219                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1220                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1221                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1222                                                         nespd->mmap_db_index); */
1223                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1224                                                 nes_debug(NES_DBG_QP,
1225                                                           "db index > max user regions, failing create QP\n");
1226                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1227                                                 if (virt_wqs) {
1228                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1229                                                                             nespbl->pbl_pbase);
1230                                                         kfree(nespbl);
1231                                                 }
1232                                                 kfree(nesqp->allocated_buffer);
1233                                                 return ERR_PTR(-ENOMEM);
1234                                         }
1235                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1236                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1237                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1238                                 } else {
1239                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1240                                         kfree(nesqp->allocated_buffer);
1241                                         return ERR_PTR(-EFAULT);
1242                                 }
1243                         }
1244                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1245                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1246                         if (err) {
1247                                 nes_debug(NES_DBG_QP,
1248                                           "error geting qp mem code = %d\n", err);
1249                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1250                                 kfree(nesqp->allocated_buffer);
1251                                 return ERR_PTR(-ENOMEM);
1252                         }
1253
1254                         nesqp->hwqp.sq_size = sq_size;
1255                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1256                         nesqp->hwqp.sq_head = 1;
1257                         nesqp->hwqp.rq_size = rq_size;
1258                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1259                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1260                                         (void *)nesqp->nesqp_context_pbase);
1261                         */
1262                         nesqp->hwqp.qp_id = qp_num;
1263                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1264                         nesqp->nespd = nespd;
1265
1266                         nescq = to_nescq(init_attr->send_cq);
1267                         nesqp->nesscq = nescq;
1268                         nescq = to_nescq(init_attr->recv_cq);
1269                         nesqp->nesrcq = nescq;
1270
1271                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1272                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1273                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1274                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1275                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1276                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1277                         if (!udata) {
1278                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1279                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1280                         }
1281                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1282                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1283                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1284                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1285                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1286
1287
1288                         if (!virt_wqs) {
1289                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1290                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1291                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1292                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1293                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1294                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1295                         } else {
1296                                 u64temp = (u64)nesqp->pbl_pbase;
1297                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1298                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1299                         }
1300
1301                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1302                                         nesvnic->next_qp_nic_index,
1303                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1304                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1305                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1306                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1307                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1308                         nesvnic->next_qp_nic_index++;
1309                         if ((nesvnic->next_qp_nic_index > 3) ||
1310                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1311                                 nesvnic->next_qp_nic_index = 0;
1312                         }
1313                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1314
1315                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1316                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1317                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1318                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1319                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1320                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1321                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1322                                         ((((u32)nesadapter->max_irrq_wr) <<
1323                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1324                         if (disable_mpa_crc) {
1325                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1326                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1327                         }
1328
1329
1330                         /* Create the QP */
1331                         cqp_request = nes_get_cqp_request(nesdev);
1332                         if (cqp_request == NULL) {
1333                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1334                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1335                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1336                                 kfree(nesqp->allocated_buffer);
1337                                 return ERR_PTR(-ENOMEM);
1338                         }
1339                         cqp_request->waiting = 1;
1340                         cqp_wqe = &cqp_request->cqp_wqe;
1341
1342                         if (!virt_wqs) {
1343                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1344                                         NES_CQP_QP_IWARP_STATE_IDLE;
1345                         } else {
1346                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1347                                         NES_CQP_QP_IWARP_STATE_IDLE;
1348                         }
1349                         opcode |= NES_CQP_QP_CQS_VALID;
1350                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1351                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1352                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1353
1354                         u64temp = (u64)nesqp->nesqp_context_pbase;
1355                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1356
1357                         atomic_set(&cqp_request->refcount, 2);
1358                         nes_post_cqp_request(nesdev, cqp_request);
1359
1360                         /* Wait for CQP */
1361                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1362                                         nesqp->hwqp.qp_id);
1363                         ret = wait_event_timeout(cqp_request->waitq,
1364                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1365                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1366                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1367                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1368                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1369                                         cqp_request->major_code, cqp_request->minor_code);
1370                         if ((!ret) || (cqp_request->major_code)) {
1371                                 nes_put_cqp_request(nesdev, cqp_request);
1372                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1373                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1374                                 kfree(nesqp->allocated_buffer);
1375                                 if (!ret) {
1376                                         return ERR_PTR(-ETIME);
1377                                 } else {
1378                                         return ERR_PTR(-EIO);
1379                                 }
1380                         }
1381
1382                         nes_put_cqp_request(nesdev, cqp_request);
1383
1384                         if (ibpd->uobject) {
1385                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1386                                 uresp.actual_sq_size = sq_size;
1387                                 uresp.actual_rq_size = rq_size;
1388                                 uresp.qp_id = nesqp->hwqp.qp_id;
1389                                 uresp.nes_drv_opt = nes_drv_opt;
1390                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1391                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1392                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1393                                         kfree(nesqp->allocated_buffer);
1394                                         return ERR_PTR(-EFAULT);
1395                                 }
1396                         }
1397
1398                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1399                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1400                         spin_lock_init(&nesqp->lock);
1401                         init_waitqueue_head(&nesqp->state_waitq);
1402                         init_waitqueue_head(&nesqp->kick_waitq);
1403                         nes_add_ref(&nesqp->ibqp);
1404                         break;
1405                 default:
1406                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1407                         return ERR_PTR(-EINVAL);
1408         }
1409
1410         /* update the QP table */
1411         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1412         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1413                         atomic_read(&nesvnic->netdev->refcnt));
1414
1415         return &nesqp->ibqp;
1416 }
1417
1418
1419 /**
1420  * nes_clean_cq
1421  */
1422 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1423 {
1424         u32 cq_head;
1425         u32 lo;
1426         u32 hi;
1427         u64 u64temp;
1428         unsigned long flags = 0;
1429
1430         spin_lock_irqsave(&nescq->lock, flags);
1431
1432         cq_head = nescq->hw_cq.cq_head;
1433         while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1434                 rmb();
1435                 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1436                 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1437                 u64temp = (((u64)hi) << 32) | ((u64)lo);
1438                 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1439                 if (u64temp == (u64)(unsigned long)nesqp) {
1440                         /* Zero the context value so cqe will be ignored */
1441                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1442                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1443                 }
1444
1445                 if (++cq_head >= nescq->hw_cq.cq_size)
1446                         cq_head = 0;
1447         }
1448
1449         spin_unlock_irqrestore(&nescq->lock, flags);
1450 }
1451
1452
1453 /**
1454  * nes_destroy_qp
1455  */
1456 static int nes_destroy_qp(struct ib_qp *ibqp)
1457 {
1458         struct nes_qp *nesqp = to_nesqp(ibqp);
1459         struct nes_ucontext *nes_ucontext;
1460         struct ib_qp_attr attr;
1461         struct iw_cm_id *cm_id;
1462         struct iw_cm_event cm_event;
1463         int ret;
1464
1465         atomic_inc(&sw_qps_destroyed);
1466         nesqp->destroyed = 1;
1467
1468         /* Blow away the connection if it exists. */
1469         if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1470                 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1471                 attr.qp_state = IB_QPS_ERR;
1472                 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1473         }
1474
1475         if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1476                         (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1477                 cm_id = nesqp->cm_id;
1478                 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1479                 cm_event.status = IW_CM_EVENT_STATUS_TIMEOUT;
1480                 cm_event.local_addr = cm_id->local_addr;
1481                 cm_event.remote_addr = cm_id->remote_addr;
1482                 cm_event.private_data = NULL;
1483                 cm_event.private_data_len = 0;
1484
1485                 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1486                                 "QP%u. cm_id = %p, refcount = %u. \n",
1487                                 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1488
1489                 cm_id->rem_ref(cm_id);
1490                 ret = cm_id->event_handler(cm_id, &cm_event);
1491                 if (ret)
1492                         nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1493         }
1494
1495         if (nesqp->user_mode) {
1496                 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1497                         nes_ucontext = to_nesucontext(ibqp->uobject->context);
1498                         clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1499                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1500                         if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1501                                 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1502                         }
1503                 }
1504                 if (nesqp->pbl_pbase)
1505                         kunmap(nesqp->page);
1506         } else {
1507                 /* Clean any pending completions from the cq(s) */
1508                 if (nesqp->nesscq)
1509                         nes_clean_cq(nesqp, nesqp->nesscq);
1510
1511                 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1512                         nes_clean_cq(nesqp, nesqp->nesrcq);
1513         }
1514
1515         nes_rem_ref(&nesqp->ibqp);
1516         return 0;
1517 }
1518
1519
1520 /**
1521  * nes_create_cq
1522  */
1523 static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
1524                 int comp_vector,
1525                 struct ib_ucontext *context, struct ib_udata *udata)
1526 {
1527         u64 u64temp;
1528         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1529         struct nes_device *nesdev = nesvnic->nesdev;
1530         struct nes_adapter *nesadapter = nesdev->nesadapter;
1531         struct nes_cq *nescq;
1532         struct nes_ucontext *nes_ucontext = NULL;
1533         struct nes_cqp_request *cqp_request;
1534         void *mem = NULL;
1535         struct nes_hw_cqp_wqe *cqp_wqe;
1536         struct nes_pbl *nespbl = NULL;
1537         struct nes_create_cq_req req;
1538         struct nes_create_cq_resp resp;
1539         u32 cq_num = 0;
1540         u32 opcode = 0;
1541         u32 pbl_entries = 1;
1542         int err;
1543         unsigned long flags;
1544         int ret;
1545
1546         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1547                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq);
1548         if (err) {
1549                 return ERR_PTR(err);
1550         }
1551
1552         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1553         if (!nescq) {
1554                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1555                 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1556                 return ERR_PTR(-ENOMEM);
1557         }
1558
1559         nescq->hw_cq.cq_size = max(entries + 1, 5);
1560         nescq->hw_cq.cq_number = cq_num;
1561         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1562
1563
1564         if (context) {
1565                 nes_ucontext = to_nesucontext(context);
1566                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1567                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1568                         kfree(nescq);
1569                         return ERR_PTR(-EFAULT);
1570                 }
1571                 nesvnic->mcrq_ucontext = nes_ucontext;
1572                 nes_ucontext->mcrqf = req.mcrqf;
1573                 if (nes_ucontext->mcrqf) {
1574                         if (nes_ucontext->mcrqf & 0x80000000)
1575                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1576                         else if (nes_ucontext->mcrqf & 0x40000000)
1577                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1578                         else
1579                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1580                         nescq->mcrqf = nes_ucontext->mcrqf;
1581                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1582                 }
1583                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1584                                 (unsigned long)req.user_cq_buffer, entries);
1585                 err = 1;
1586                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1587                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1588                                 list_del(&nespbl->list);
1589                                 err = 0;
1590                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1591                                                 nespbl);
1592                                 break;
1593                         }
1594                 }
1595                 if (err) {
1596                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1597                         kfree(nescq);
1598                         return ERR_PTR(-EFAULT);
1599                 }
1600
1601                 pbl_entries = nespbl->pbl_size >> 3;
1602                 nescq->cq_mem_size = 0;
1603         } else {
1604                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1605                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1606                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1607
1608                 /* allocate the physical buffer space */
1609                 mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1610                                 &nescq->hw_cq.cq_pbase);
1611                 if (!mem) {
1612                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1613                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1614                         kfree(nescq);
1615                         return ERR_PTR(-ENOMEM);
1616                 }
1617
1618                 memset(mem, 0, nescq->cq_mem_size);
1619                 nescq->hw_cq.cq_vbase = mem;
1620                 nescq->hw_cq.cq_head = 0;
1621                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1622                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1623                                 (u32)nescq->hw_cq.cq_pbase);
1624         }
1625
1626         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1627         spin_lock_init(&nescq->lock);
1628
1629         /* send CreateCQ request to CQP */
1630         cqp_request = nes_get_cqp_request(nesdev);
1631         if (cqp_request == NULL) {
1632                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1633                 if (!context)
1634                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1635                                         nescq->hw_cq.cq_pbase);
1636                 else {
1637                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1638                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1639                         kfree(nespbl);
1640                 }
1641
1642                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1643                 kfree(nescq);
1644                 return ERR_PTR(-ENOMEM);
1645         }
1646         cqp_request->waiting = 1;
1647         cqp_wqe = &cqp_request->cqp_wqe;
1648
1649         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1650                         NES_CQP_CQ_CHK_OVERFLOW |
1651                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1652
1653         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1654
1655         if (pbl_entries != 1) {
1656                 if (pbl_entries > 32) {
1657                         /* use 4k pbl */
1658                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1659                         if (nesadapter->free_4kpbl == 0) {
1660                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1661                                 nes_free_cqp_request(nesdev, cqp_request);
1662                                 if (!context)
1663                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1664                                                         nescq->hw_cq.cq_pbase);
1665                                 else {
1666                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1667                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1668                                         kfree(nespbl);
1669                                 }
1670                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1671                                 kfree(nescq);
1672                                 return ERR_PTR(-ENOMEM);
1673                         } else {
1674                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1675                                 nescq->virtual_cq = 2;
1676                                 nesadapter->free_4kpbl--;
1677                         }
1678                 } else {
1679                         /* use 256 byte pbl */
1680                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1681                         if (nesadapter->free_256pbl == 0) {
1682                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1683                                 nes_free_cqp_request(nesdev, cqp_request);
1684                                 if (!context)
1685                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1686                                                         nescq->hw_cq.cq_pbase);
1687                                 else {
1688                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1689                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1690                                         kfree(nespbl);
1691                                 }
1692                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1693                                 kfree(nescq);
1694                                 return ERR_PTR(-ENOMEM);
1695                         } else {
1696                                 opcode |= NES_CQP_CQ_VIRT;
1697                                 nescq->virtual_cq = 1;
1698                                 nesadapter->free_256pbl--;
1699                         }
1700                 }
1701         }
1702
1703         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1704
1705         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1706         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1707         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1708                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1709
1710         if (context) {
1711                 if (pbl_entries != 1)
1712                         u64temp = (u64)nespbl->pbl_pbase;
1713                 else
1714                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1715                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1716                                 nes_ucontext->mmap_db_index[0]);
1717         } else {
1718                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1719                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1720         }
1721         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1722         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1723         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1724         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1725                         cpu_to_le32((u32)(u64temp >> 1));
1726         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1727                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1728
1729         atomic_set(&cqp_request->refcount, 2);
1730         nes_post_cqp_request(nesdev, cqp_request);
1731
1732         /* Wait for CQP */
1733         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1734                         nescq->hw_cq.cq_number);
1735         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1736                         NES_EVENT_TIMEOUT * 2);
1737         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1738                         nescq->hw_cq.cq_number, ret);
1739         if ((!ret) || (cqp_request->major_code)) {
1740                 nes_put_cqp_request(nesdev, cqp_request);
1741                 if (!context)
1742                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1743                                         nescq->hw_cq.cq_pbase);
1744                 else {
1745                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1746                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1747                         kfree(nespbl);
1748                 }
1749                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1750                 kfree(nescq);
1751                 return ERR_PTR(-EIO);
1752         }
1753         nes_put_cqp_request(nesdev, cqp_request);
1754
1755         if (context) {
1756                 /* free the nespbl */
1757                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1758                                 nespbl->pbl_pbase);
1759                 kfree(nespbl);
1760                 resp.cq_id = nescq->hw_cq.cq_number;
1761                 resp.cq_size = nescq->hw_cq.cq_size;
1762                 resp.mmap_db_index = 0;
1763                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
1764                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1765                         kfree(nescq);
1766                         return ERR_PTR(-EFAULT);
1767                 }
1768         }
1769
1770         return &nescq->ibcq;
1771 }
1772
1773
1774 /**
1775  * nes_destroy_cq
1776  */
1777 static int nes_destroy_cq(struct ib_cq *ib_cq)
1778 {
1779         struct nes_cq *nescq;
1780         struct nes_device *nesdev;
1781         struct nes_vnic *nesvnic;
1782         struct nes_adapter *nesadapter;
1783         struct nes_hw_cqp_wqe *cqp_wqe;
1784         struct nes_cqp_request *cqp_request;
1785         unsigned long flags;
1786         u32 opcode = 0;
1787         int ret;
1788
1789         if (ib_cq == NULL)
1790                 return 0;
1791
1792         nescq = to_nescq(ib_cq);
1793         nesvnic = to_nesvnic(ib_cq->device);
1794         nesdev = nesvnic->nesdev;
1795         nesadapter = nesdev->nesadapter;
1796
1797         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1798
1799         /* Send DestroyCQ request to CQP */
1800         cqp_request = nes_get_cqp_request(nesdev);
1801         if (cqp_request == NULL) {
1802                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1803                 return -ENOMEM;
1804         }
1805         cqp_request->waiting = 1;
1806         cqp_wqe = &cqp_request->cqp_wqe;
1807         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1808         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1809         if (nescq->virtual_cq == 1) {
1810                 nesadapter->free_256pbl++;
1811                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1812                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1813                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1814                 }
1815         } else if (nescq->virtual_cq == 2) {
1816                 nesadapter->free_4kpbl++;
1817                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1818                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1819                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1820                 }
1821                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1822         }
1823
1824         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1825
1826         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1827         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1828         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1829                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1830         if (!nescq->mcrqf)
1831                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1832
1833         atomic_set(&cqp_request->refcount, 2);
1834         nes_post_cqp_request(nesdev, cqp_request);
1835
1836         /* Wait for CQP */
1837         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1838                         nescq->hw_cq.cq_number);
1839         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1840                         NES_EVENT_TIMEOUT);
1841         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1842                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1843                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1844                         cqp_request->minor_code);
1845         if (!ret) {
1846                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1847                                         nescq->hw_cq.cq_number);
1848                 ret = -ETIME;
1849         } else if (cqp_request->major_code) {
1850                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1851                                         nescq->hw_cq.cq_number);
1852                 ret = -EIO;
1853         } else {
1854                 ret = 0;
1855         }
1856         nes_put_cqp_request(nesdev, cqp_request);
1857
1858         if (nescq->cq_mem_size)
1859                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1860                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1861         kfree(nescq);
1862
1863         return ret;
1864 }
1865
1866 /**
1867  * root_256
1868  */
1869 static u32 root_256(struct nes_device *nesdev,
1870                     struct nes_root_vpbl *root_vpbl,
1871                     struct nes_root_vpbl *new_root,
1872                     u16 pbl_count_4k)
1873 {
1874         u64 leaf_pbl;
1875         int i, j, k;
1876
1877         if (pbl_count_4k == 1) {
1878                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1879                                                 512, &new_root->pbl_pbase);
1880
1881                 if (new_root->pbl_vbase == NULL)
1882                         return 0;
1883
1884                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1885                 for (i = 0; i < 16; i++) {
1886                         new_root->pbl_vbase[i].pa_low =
1887                                 cpu_to_le32((u32)leaf_pbl);
1888                         new_root->pbl_vbase[i].pa_high =
1889                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1890                         leaf_pbl += 256;
1891                 }
1892         } else {
1893                 for (i = 3; i >= 0; i--) {
1894                         j = i * 16;
1895                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1896                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1897                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1898                                 << 32);
1899                         for (k = 1; k < 16; k++) {
1900                                 leaf_pbl += 256;
1901                                 root_vpbl->pbl_vbase[j + k].pa_low =
1902                                                 cpu_to_le32((u32)leaf_pbl);
1903                                 root_vpbl->pbl_vbase[j + k].pa_high =
1904                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1905                         }
1906                 }
1907         }
1908
1909         return 1;
1910 }
1911
1912
1913 /**
1914  * nes_reg_mr
1915  */
1916 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1917                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1918                 dma_addr_t single_buffer, u16 pbl_count_4k,
1919                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1920                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1921 {
1922         struct nes_hw_cqp_wqe *cqp_wqe;
1923         struct nes_cqp_request *cqp_request;
1924         unsigned long flags;
1925         int ret;
1926         struct nes_adapter *nesadapter = nesdev->nesadapter;
1927         uint pg_cnt = 0;
1928         u16 pbl_count_256 = 0;
1929         u16 pbl_count = 0;
1930         u8  use_256_pbls = 0;
1931         u8  use_4k_pbls = 0;
1932         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1933         struct nes_root_vpbl new_root = {0, 0, 0};
1934         u32 opcode = 0;
1935         u16 major_code;
1936
1937         /* Register the region with the adapter */
1938         cqp_request = nes_get_cqp_request(nesdev);
1939         if (cqp_request == NULL) {
1940                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1941                 return -ENOMEM;
1942         }
1943         cqp_request->waiting = 1;
1944         cqp_wqe = &cqp_request->cqp_wqe;
1945
1946         if (pbl_count_4k) {
1947                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1948
1949                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1950                 pbl_count_256 = (pg_cnt + 31) / 32;
1951                 if (pg_cnt <= 32) {
1952                         if (pbl_count_256 <= nesadapter->free_256pbl)
1953                                 use_256_pbls = 1;
1954                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1955                                 use_4k_pbls = 1;
1956                 } else if (pg_cnt <= 2048) {
1957                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1958                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1959                                 use_4k_pbls = 1;
1960                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1961                                 use_256_pbls = 1;
1962                                 use_two_level = 1;
1963                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1964                                 use_4k_pbls = 1;
1965                         }
1966                 } else {
1967                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1968                                 use_4k_pbls = 1;
1969                 }
1970
1971                 if (use_256_pbls) {
1972                         pbl_count = pbl_count_256;
1973                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1974                 } else if (use_4k_pbls) {
1975                         pbl_count =  pbl_count_4k;
1976                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1977                 } else {
1978                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1979                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1980                         nes_free_cqp_request(nesdev, cqp_request);
1981                         return -ENOMEM;
1982                 }
1983
1984                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1985         }
1986
1987         if (use_256_pbls && use_two_level) {
1988                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1989                         if (new_root.pbl_pbase != 0)
1990                                 root_vpbl = &new_root;
1991                 } else {
1992                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1993                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1994                         use_256_pbls = 0;
1995
1996                         if (pbl_count_4k == 1)
1997                                 use_two_level = 0;
1998                         pbl_count = pbl_count_4k;
1999
2000                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
2001                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
2002                                 use_4k_pbls = 1;
2003                         }
2004                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2005
2006                         if (use_4k_pbls == 0)
2007                                 return -ENOMEM;
2008                 }
2009         }
2010
2011         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
2012                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
2013         if (acc & IB_ACCESS_LOCAL_WRITE)
2014                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
2015         if (acc & IB_ACCESS_REMOTE_WRITE)
2016                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
2017         if (acc & IB_ACCESS_REMOTE_READ)
2018                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
2019         if (acc & IB_ACCESS_MW_BIND)
2020                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
2021
2022         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2023         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
2024         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
2025         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
2026
2027         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
2028                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
2029         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
2030                         cpu_to_le32(nespd->pd_id & 0x00007fff);
2031         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
2032
2033         if (pbl_count == 0) {
2034                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
2035         } else {
2036                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
2037                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
2038                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
2039
2040                 if (use_4k_pbls)
2041                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
2042         }
2043         barrier();
2044
2045         atomic_set(&cqp_request->refcount, 2);
2046         nes_post_cqp_request(nesdev, cqp_request);
2047
2048         /* Wait for CQP */
2049         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
2050                         NES_EVENT_TIMEOUT);
2051         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
2052                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2053                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
2054         major_code = cqp_request->major_code;
2055         nes_put_cqp_request(nesdev, cqp_request);
2056
2057         if ((!ret || major_code) && pbl_count != 0) {
2058                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2059                 if (use_256_pbls)
2060                         nesadapter->free_256pbl += pbl_count + use_two_level;
2061                 else if (use_4k_pbls)
2062                         nesadapter->free_4kpbl += pbl_count + use_two_level;
2063                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2064         }
2065         if (new_root.pbl_pbase)
2066                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
2067                                     new_root.pbl_pbase);
2068
2069         if (!ret)
2070                 return -ETIME;
2071         else if (major_code)
2072                 return -EIO;
2073
2074         *actual_pbl_cnt = pbl_count + use_two_level;
2075         *used_4k_pbls = use_4k_pbls;
2076         return 0;
2077 }
2078
2079
2080 /**
2081  * nes_reg_phys_mr
2082  */
2083 static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
2084                 struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
2085                 u64 * iova_start)
2086 {
2087         u64 region_length;
2088         struct nes_pd *nespd = to_nespd(ib_pd);
2089         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2090         struct nes_device *nesdev = nesvnic->nesdev;
2091         struct nes_adapter *nesadapter = nesdev->nesadapter;
2092         struct nes_mr *nesmr;
2093         struct ib_mr *ibmr;
2094         struct nes_vpbl vpbl;
2095         struct nes_root_vpbl root_vpbl;
2096         u32 stag;
2097         u32 i;
2098         unsigned long mask;
2099         u32 stag_index = 0;
2100         u32 next_stag_index = 0;
2101         u32 driver_key = 0;
2102         u32 root_pbl_index = 0;
2103         u32 cur_pbl_index = 0;
2104         int err = 0, pbl_depth = 0;
2105         int ret = 0;
2106         u16 pbl_count = 0;
2107         u8 single_page = 1;
2108         u8 stag_key = 0;
2109
2110         pbl_depth = 0;
2111         region_length = 0;
2112         vpbl.pbl_vbase = NULL;
2113         root_vpbl.pbl_vbase = NULL;
2114         root_vpbl.pbl_pbase = 0;
2115
2116         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2117         stag_key = (u8)next_stag_index;
2118
2119         driver_key = 0;
2120
2121         next_stag_index >>= 8;
2122         next_stag_index %= nesadapter->max_mr;
2123         if (num_phys_buf > (1024*512)) {
2124                 return ERR_PTR(-E2BIG);
2125         }
2126
2127         if ((buffer_list[0].addr ^ *iova_start) & ~PAGE_MASK)
2128                 return ERR_PTR(-EINVAL);
2129
2130         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2131                         &stag_index, &next_stag_index);
2132         if (err) {
2133                 return ERR_PTR(err);
2134         }
2135
2136         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2137         if (!nesmr) {
2138                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2139                 return ERR_PTR(-ENOMEM);
2140         }
2141
2142         for (i = 0; i < num_phys_buf; i++) {
2143
2144                 if ((i & 0x01FF) == 0) {
2145                         if (root_pbl_index == 1) {
2146                                 /* Allocate the root PBL */
2147                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
2148                                                 &root_vpbl.pbl_pbase);
2149                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2150                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2151                                 if (!root_vpbl.pbl_vbase) {
2152                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2153                                                         vpbl.pbl_pbase);
2154                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2155                                         kfree(nesmr);
2156                                         return ERR_PTR(-ENOMEM);
2157                                 }
2158                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
2159                                 if (!root_vpbl.leaf_vpbl) {
2160                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2161                                                         root_vpbl.pbl_pbase);
2162                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2163                                                         vpbl.pbl_pbase);
2164                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2165                                         kfree(nesmr);
2166                                         return ERR_PTR(-ENOMEM);
2167                                 }
2168                                 root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
2169                                 root_vpbl.pbl_vbase[0].pa_high =
2170                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2171                                 root_vpbl.leaf_vpbl[0] = vpbl;
2172                         }
2173                         /* Allocate a 4K buffer for the PBL */
2174                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2175                                         &vpbl.pbl_pbase);
2176                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2177                                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2178                         if (!vpbl.pbl_vbase) {
2179                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2180                                 ibmr = ERR_PTR(-ENOMEM);
2181                                 kfree(nesmr);
2182                                 goto reg_phys_err;
2183                         }
2184                         /* Fill in the root table */
2185                         if (1 <= root_pbl_index) {
2186                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2187                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2188                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2189                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2190                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2191                         }
2192                         root_pbl_index++;
2193                         cur_pbl_index = 0;
2194                 }
2195
2196                 mask = !buffer_list[i].size;
2197                 if (i != 0)
2198                         mask |= buffer_list[i].addr;
2199                 if (i != num_phys_buf - 1)
2200                         mask |= buffer_list[i].addr + buffer_list[i].size;
2201
2202                 if (mask & ~PAGE_MASK) {
2203                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2204                         nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2205                         ibmr = ERR_PTR(-EINVAL);
2206                         kfree(nesmr);
2207                         goto reg_phys_err;
2208                 }
2209
2210                 region_length += buffer_list[i].size;
2211                 if ((i != 0) && (single_page)) {
2212                         if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
2213                                 single_page = 0;
2214                 }
2215                 vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr & PAGE_MASK);
2216                 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
2217                                 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
2218         }
2219
2220         stag = stag_index << 8;
2221         stag |= driver_key;
2222         stag += (u32)stag_key;
2223
2224         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2225                         " length = 0x%016lX, index = 0x%08X\n",
2226                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2227
2228         /* Make the leaf PBL the root if only one PBL */
2229         if (root_pbl_index == 1) {
2230                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2231         }
2232
2233         if (single_page) {
2234                 pbl_count = 0;
2235         } else {
2236                 pbl_count = root_pbl_index;
2237         }
2238         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2239                         buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start,
2240                         &nesmr->pbls_used, &nesmr->pbl_4k);
2241
2242         if (ret == 0) {
2243                 nesmr->ibmr.rkey = stag;
2244                 nesmr->ibmr.lkey = stag;
2245                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2246                 ibmr = &nesmr->ibmr;
2247         } else {
2248                 kfree(nesmr);
2249                 ibmr = ERR_PTR(-ENOMEM);
2250         }
2251
2252         reg_phys_err:
2253         /* free the resources */
2254         if (root_pbl_index == 1) {
2255                 /* single PBL case */
2256                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2257         } else {
2258                 for (i=0; i<root_pbl_index; i++) {
2259                         pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
2260                                         root_vpbl.leaf_vpbl[i].pbl_pbase);
2261                 }
2262                 kfree(root_vpbl.leaf_vpbl);
2263                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2264                                 root_vpbl.pbl_pbase);
2265         }
2266
2267         return ibmr;
2268 }
2269
2270
2271 /**
2272  * nes_get_dma_mr
2273  */
2274 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2275 {
2276         struct ib_phys_buf bl;
2277         u64 kva = 0;
2278
2279         nes_debug(NES_DBG_MR, "\n");
2280
2281         bl.size = (u64)0xffffffffffULL;
2282         bl.addr = 0;
2283         return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
2284 }
2285
2286
2287 /**
2288  * nes_reg_user_mr
2289  */
2290 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2291                 u64 virt, int acc, struct ib_udata *udata)
2292 {
2293         u64 iova_start;
2294         __le64 *pbl;
2295         u64 region_length;
2296         dma_addr_t last_dma_addr = 0;
2297         dma_addr_t first_dma_addr = 0;
2298         struct nes_pd *nespd = to_nespd(pd);
2299         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2300         struct nes_device *nesdev = nesvnic->nesdev;
2301         struct nes_adapter *nesadapter = nesdev->nesadapter;
2302         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2303         struct ib_umem_chunk *chunk;
2304         struct nes_ucontext *nes_ucontext;
2305         struct nes_pbl *nespbl;
2306         struct nes_mr *nesmr;
2307         struct ib_umem *region;
2308         struct nes_mem_reg_req req;
2309         struct nes_vpbl vpbl;
2310         struct nes_root_vpbl root_vpbl;
2311         int nmap_index, page_index;
2312         int page_count = 0;
2313         int err, pbl_depth = 0;
2314         int chunk_pages;
2315         int ret;
2316         u32 stag;
2317         u32 stag_index = 0;
2318         u32 next_stag_index;
2319         u32 driver_key;
2320         u32 root_pbl_index = 0;
2321         u32 cur_pbl_index = 0;
2322         u32 skip_pages;
2323         u16 pbl_count;
2324         u8 single_page = 1;
2325         u8 stag_key;
2326
2327         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2328         if (IS_ERR(region)) {
2329                 return (struct ib_mr *)region;
2330         }
2331
2332         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2333                         " offset = %u, page size = %u.\n",
2334                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2335                         region->offset, region->page_size);
2336
2337         skip_pages = ((u32)region->offset) >> 12;
2338
2339         if (ib_copy_from_udata(&req, udata, sizeof(req)))
2340                 return ERR_PTR(-EFAULT);
2341         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2342
2343         switch (req.reg_type) {
2344                 case IWNES_MEMREG_TYPE_MEM:
2345                         pbl_depth = 0;
2346                         region_length = 0;
2347                         vpbl.pbl_vbase = NULL;
2348                         root_vpbl.pbl_vbase = NULL;
2349                         root_vpbl.pbl_pbase = 0;
2350
2351                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2352                         stag_key = (u8)next_stag_index;
2353
2354                         driver_key = next_stag_index & 0x70000000;
2355
2356                         next_stag_index >>= 8;
2357                         next_stag_index %= nesadapter->max_mr;
2358
2359                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2360                                         nesadapter->max_mr, &stag_index, &next_stag_index);
2361                         if (err) {
2362                                 ib_umem_release(region);
2363                                 return ERR_PTR(err);
2364                         }
2365
2366                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2367                         if (!nesmr) {
2368                                 ib_umem_release(region);
2369                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2370                                 return ERR_PTR(-ENOMEM);
2371                         }
2372                         nesmr->region = region;
2373
2374                         list_for_each_entry(chunk, &region->chunk_list, list) {
2375                                 nes_debug(NES_DBG_MR, "Chunk: nents = %u, nmap = %u .\n",
2376                                                 chunk->nents, chunk->nmap);
2377                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2378                                         if (sg_dma_address(&chunk->page_list[nmap_index]) & ~PAGE_MASK) {
2379                                                 ib_umem_release(region);
2380                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2381                                                 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2382                                                                 (unsigned int) sg_dma_address(&chunk->page_list[nmap_index]));
2383                                                 ibmr = ERR_PTR(-EINVAL);
2384                                                 kfree(nesmr);
2385                                                 goto reg_user_mr_err;
2386                                         }
2387
2388                                         if (!sg_dma_len(&chunk->page_list[nmap_index])) {
2389                                                 ib_umem_release(region);
2390                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2391                                                                 stag_index);
2392                                                 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2393                                                 ibmr = ERR_PTR(-EINVAL);
2394                                                 kfree(nesmr);
2395                                                 goto reg_user_mr_err;
2396                                         }
2397
2398                                         region_length += sg_dma_len(&chunk->page_list[nmap_index]);
2399                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2400                                         region_length -= skip_pages << 12;
2401                                         for (page_index=skip_pages; page_index < chunk_pages; page_index++) {
2402                                                 skip_pages = 0;
2403                                                 if ((page_count!=0)&&(page_count<<12)-(region->offset&(4096-1))>=region->length)
2404                                                         goto enough_pages;
2405                                                 if ((page_count&0x01FF) == 0) {
2406                                                         if (page_count >= 1024 * 512) {
2407                                                                 ib_umem_release(region);
2408                                                                 nes_free_resource(nesadapter,
2409                                                                                 nesadapter->allocated_mrs, stag_index);
2410                                                                 kfree(nesmr);
2411                                                                 ibmr = ERR_PTR(-E2BIG);
2412                                                                 goto reg_user_mr_err;
2413                                                         }
2414                                                         if (root_pbl_index == 1) {
2415                                                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2416                                                                                 8192, &root_vpbl.pbl_pbase);
2417                                                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2418                                                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2419                                                                 if (!root_vpbl.pbl_vbase) {
2420                                                                         ib_umem_release(region);
2421                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2422                                                                                         vpbl.pbl_pbase);
2423                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2424                                                                                         stag_index);
2425                                                                         kfree(nesmr);
2426                                                                         ibmr = ERR_PTR(-ENOMEM);
2427                                                                         goto reg_user_mr_err;
2428                                                                 }
2429                                                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2430                                                                                 GFP_KERNEL);
2431                                                                 if (!root_vpbl.leaf_vpbl) {
2432                                                                         ib_umem_release(region);
2433                                                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2434                                                                                         root_vpbl.pbl_pbase);
2435                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2436                                                                                         vpbl.pbl_pbase);
2437                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2438                                                                                         stag_index);
2439                                                                         kfree(nesmr);
2440                                                                         ibmr = ERR_PTR(-ENOMEM);
2441                                                                         goto reg_user_mr_err;
2442                                                                 }
2443                                                                 root_vpbl.pbl_vbase[0].pa_low =
2444                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2445                                                                 root_vpbl.pbl_vbase[0].pa_high =
2446                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2447                                                                 root_vpbl.leaf_vpbl[0] = vpbl;
2448                                                         }
2449                                                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2450                                                                         &vpbl.pbl_pbase);
2451                                                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2452                                                                         vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2453                                                         if (!vpbl.pbl_vbase) {
2454                                                                 ib_umem_release(region);
2455                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2456                                                                 ibmr = ERR_PTR(-ENOMEM);
2457                                                                 kfree(nesmr);
2458                                                                 goto reg_user_mr_err;
2459                                                         }
2460                                                         if (1 <= root_pbl_index) {
2461                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2462                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2463                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2464                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2465                                                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2466                                                         }
2467                                                         root_pbl_index++;
2468                                                         cur_pbl_index = 0;
2469                                                 }
2470                                                 if (single_page) {
2471                                                         if (page_count != 0) {
2472                                                                 if ((last_dma_addr+4096) !=
2473                                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2474                                                                                 (page_index*4096)))
2475                                                                         single_page = 0;
2476                                                                 last_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2477                                                                                 (page_index*4096);
2478                                                         } else {
2479                                                                 first_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2480                                                                                 (page_index*4096);
2481                                                                 last_dma_addr = first_dma_addr;
2482                                                         }
2483                                                 }
2484
2485                                                 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2486                                                                 cpu_to_le32((u32)(sg_dma_address(&chunk->page_list[nmap_index])+
2487                                                                 (page_index*4096)));
2488                                                 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2489                                                                 cpu_to_le32((u32)((((u64)(sg_dma_address(&chunk->page_list[nmap_index])+
2490                                                                 (page_index*4096))) >> 32)));
2491                                                 cur_pbl_index++;
2492                                                 page_count++;
2493                                         }
2494                                 }
2495                         }
2496                         enough_pages:
2497                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2498                                         " stag_key=0x%08x\n",
2499                                         stag_index, driver_key, stag_key);
2500                         stag = stag_index << 8;
2501                         stag |= driver_key;
2502                         stag += (u32)stag_key;
2503                         if (stag == 0) {
2504                                 stag = 1;
2505                         }
2506
2507                         iova_start = virt;
2508                         /* Make the leaf PBL the root if only one PBL */
2509                         if (root_pbl_index == 1) {
2510                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2511                         }
2512
2513                         if (single_page) {
2514                                 pbl_count = 0;
2515                         } else {
2516                                 pbl_count = root_pbl_index;
2517                                 first_dma_addr = 0;
2518                         }
2519                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2520                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2521                                         stag, (unsigned int)iova_start,
2522                                         (unsigned int)region_length, stag_index,
2523                                         (unsigned long long)region->length, pbl_count);
2524                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2525                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2526                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2527
2528                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2529
2530                         if (ret == 0) {
2531                                 nesmr->ibmr.rkey = stag;
2532                                 nesmr->ibmr.lkey = stag;
2533                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2534                                 ibmr = &nesmr->ibmr;
2535                         } else {
2536                                 ib_umem_release(region);
2537                                 kfree(nesmr);
2538                                 ibmr = ERR_PTR(-ENOMEM);
2539                         }
2540
2541                         reg_user_mr_err:
2542                         /* free the resources */
2543                         if (root_pbl_index == 1) {
2544                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2545                                                 vpbl.pbl_pbase);
2546                         } else {
2547                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2548                                         pci_free_consistent(nesdev->pcidev, 4096,
2549                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2550                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2551                                 }
2552                                 kfree(root_vpbl.leaf_vpbl);
2553                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2554                                                 root_vpbl.pbl_pbase);
2555                         }
2556
2557                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2558
2559                         return ibmr;
2560                 case IWNES_MEMREG_TYPE_QP:
2561                 case IWNES_MEMREG_TYPE_CQ:
2562                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2563                         if (!nespbl) {
2564                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2565                                 ib_umem_release(region);
2566                                 return ERR_PTR(-ENOMEM);
2567                         }
2568                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2569                         if (!nesmr) {
2570                                 ib_umem_release(region);
2571                                 kfree(nespbl);
2572                                 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2573                                 return ERR_PTR(-ENOMEM);
2574                         }
2575                         nesmr->region = region;
2576                         nes_ucontext = to_nesucontext(pd->uobject->context);
2577                         pbl_depth = region->length >> 12;
2578                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2579                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2580                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2581                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2582                         } else {
2583                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2584                         }
2585
2586                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2587                                         nespbl->pbl_size, pbl_depth);
2588                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2589                                         &nespbl->pbl_pbase);
2590                         if (!pbl) {
2591                                 ib_umem_release(region);
2592                                 kfree(nesmr);
2593                                 kfree(nespbl);
2594                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2595                                 return ERR_PTR(-ENOMEM);
2596                         }
2597
2598                         nespbl->pbl_vbase = (u64 *)pbl;
2599                         nespbl->user_base = start;
2600                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2601                                         " pbl_vbase=%p user_base=0x%lx\n",
2602                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2603                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2604
2605                         list_for_each_entry(chunk, &region->chunk_list, list) {
2606                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2607                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2608                                         chunk_pages += (sg_dma_len(&chunk->page_list[nmap_index]) & (4096-1)) ? 1 : 0;
2609                                         nespbl->page = sg_page(&chunk->page_list[0]);
2610                                         for (page_index=0; page_index<chunk_pages; page_index++) {
2611                                                 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2612                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2613                                                                 (page_index*4096)));
2614                                                 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2615                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2616                                                                 (page_index*4096)))>>32);
2617                                                 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2618                                                                 (unsigned long long)*pbl,
2619                                                                 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2620                                                 pbl++;
2621                                         }
2622                                 }
2623                         }
2624                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2625                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2626                         } else {
2627                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2628                         }
2629                         nesmr->ibmr.rkey = -1;
2630                         nesmr->ibmr.lkey = -1;
2631                         nesmr->mode = req.reg_type;
2632                         return &nesmr->ibmr;
2633         }
2634
2635         return ERR_PTR(-ENOSYS);
2636 }
2637
2638
2639 /**
2640  * nes_dereg_mr
2641  */
2642 static int nes_dereg_mr(struct ib_mr *ib_mr)
2643 {
2644         struct nes_mr *nesmr = to_nesmr(ib_mr);
2645         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2646         struct nes_device *nesdev = nesvnic->nesdev;
2647         struct nes_adapter *nesadapter = nesdev->nesadapter;
2648         struct nes_hw_cqp_wqe *cqp_wqe;
2649         struct nes_cqp_request *cqp_request;
2650         unsigned long flags;
2651         int ret;
2652         u16 major_code;
2653         u16 minor_code;
2654
2655         if (nesmr->region) {
2656                 ib_umem_release(nesmr->region);
2657         }
2658         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2659                 kfree(nesmr);
2660                 return 0;
2661         }
2662
2663         /* Deallocate the region with the adapter */
2664
2665         cqp_request = nes_get_cqp_request(nesdev);
2666         if (cqp_request == NULL) {
2667                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2668                 return -ENOMEM;
2669         }
2670         cqp_request->waiting = 1;
2671         cqp_wqe = &cqp_request->cqp_wqe;
2672
2673         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2674         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2675                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2676                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2677         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2678
2679         atomic_set(&cqp_request->refcount, 2);
2680         nes_post_cqp_request(nesdev, cqp_request);
2681
2682         /* Wait for CQP */
2683         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2684         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2685                         NES_EVENT_TIMEOUT);
2686         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2687                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2688                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2689
2690         major_code = cqp_request->major_code;
2691         minor_code = cqp_request->minor_code;
2692
2693         nes_put_cqp_request(nesdev, cqp_request);
2694
2695         if (!ret) {
2696                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2697                                 " ib_mr=%p, rkey = 0x%08X\n",
2698                                 ib_mr, ib_mr->rkey);
2699                 return -ETIME;
2700         } else if (major_code) {
2701                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2702                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2703                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2704                 return -EIO;
2705         }
2706
2707         if (nesmr->pbls_used != 0) {
2708                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2709                 if (nesmr->pbl_4k) {
2710                         nesadapter->free_4kpbl += nesmr->pbls_used;
2711                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2712                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2713                                         "exceeded the max(%u)\n",
2714                                         nesadapter->free_4kpbl,
2715                                         nesadapter->max_4kpbl);
2716                 } else {
2717                         nesadapter->free_256pbl += nesmr->pbls_used;
2718                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2719                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2720                                         "exceeded the max(%u)\n",
2721                                         nesadapter->free_256pbl,
2722                                         nesadapter->max_256pbl);
2723                 }
2724                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2725         }
2726         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2727                         (ib_mr->rkey & 0x0fffff00) >> 8);
2728
2729         kfree(nesmr);
2730
2731         return 0;
2732 }
2733
2734
2735 /**
2736  * show_rev
2737  */
2738 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2739                         char *buf)
2740 {
2741         struct nes_ib_device *nesibdev =
2742                         container_of(dev, struct nes_ib_device, ibdev.dev);
2743         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2744
2745         nes_debug(NES_DBG_INIT, "\n");
2746         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2747 }
2748
2749
2750 /**
2751  * show_fw_ver
2752  */
2753 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
2754                            char *buf)
2755 {
2756         struct nes_ib_device *nesibdev =
2757                         container_of(dev, struct nes_ib_device, ibdev.dev);
2758         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2759
2760         nes_debug(NES_DBG_INIT, "\n");
2761         return sprintf(buf, "%u.%u\n",
2762                 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
2763                 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
2764 }
2765
2766
2767 /**
2768  * show_hca
2769  */
2770 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2771                         char *buf)
2772 {
2773         nes_debug(NES_DBG_INIT, "\n");
2774         return sprintf(buf, "NES020\n");
2775 }
2776
2777
2778 /**
2779  * show_board
2780  */
2781 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2782                           char *buf)
2783 {
2784         nes_debug(NES_DBG_INIT, "\n");
2785         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2786 }
2787
2788
2789 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2790 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2791 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2792 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2793
2794 static struct device_attribute *nes_dev_attributes[] = {
2795         &dev_attr_hw_rev,
2796         &dev_attr_fw_ver,
2797         &dev_attr_hca_type,
2798         &dev_attr_board_id
2799 };
2800
2801
2802 /**
2803  * nes_query_qp
2804  */
2805 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2806                 int attr_mask, struct ib_qp_init_attr *init_attr)
2807 {
2808         struct nes_qp *nesqp = to_nesqp(ibqp);
2809
2810         nes_debug(NES_DBG_QP, "\n");
2811
2812         attr->qp_access_flags = 0;
2813         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2814         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2815         attr->cap.max_recv_sge = 1;
2816         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
2817                 init_attr->cap.max_inline_data = 0;
2818         } else {
2819                 init_attr->cap.max_inline_data = 64;
2820         }
2821
2822         init_attr->event_handler = nesqp->ibqp.event_handler;
2823         init_attr->qp_context = nesqp->ibqp.qp_context;
2824         init_attr->send_cq = nesqp->ibqp.send_cq;
2825         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2826         init_attr->srq = nesqp->ibqp.srq = nesqp->ibqp.srq;
2827         init_attr->cap = attr->cap;
2828
2829         return 0;
2830 }
2831
2832
2833 /**
2834  * nes_hw_modify_qp
2835  */
2836 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2837                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2838 {
2839         struct nes_hw_cqp_wqe *cqp_wqe;
2840         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2841         /* struct iw_cm_event cm_event; */
2842         struct nes_cqp_request *cqp_request;
2843         int ret;
2844         u16 major_code;
2845
2846         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2847                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2848
2849         cqp_request = nes_get_cqp_request(nesdev);
2850         if (cqp_request == NULL) {
2851                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2852                 return -ENOMEM;
2853         }
2854         if (wait_completion) {
2855                 cqp_request->waiting = 1;
2856         } else {
2857                 cqp_request->waiting = 0;
2858         }
2859         cqp_wqe = &cqp_request->cqp_wqe;
2860
2861         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2862                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2863         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2864                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2865         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2866         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2867         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2868
2869         /* If sending a terminate message, fill in the length (in words) */
2870         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2871             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2872                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2873                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2874         }
2875
2876         atomic_set(&cqp_request->refcount, 2);
2877         nes_post_cqp_request(nesdev, cqp_request);
2878
2879         /* Wait for CQP */
2880         if (wait_completion) {
2881                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2882                                 nesqp->hwqp.qp_id); */
2883                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2884                                 NES_EVENT_TIMEOUT);
2885                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2886                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2887                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2888                 major_code = cqp_request->major_code;
2889                 if (major_code) {
2890                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2891                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2892                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2893                                         cqp_request->minor_code, next_iwarp_state);
2894                 }
2895
2896                 nes_put_cqp_request(nesdev, cqp_request);
2897
2898                 if (!ret)
2899                         return -ETIME;
2900                 else if (major_code)
2901                         return -EIO;
2902                 else
2903                         return 0;
2904         } else {
2905                 return 0;
2906         }
2907 }
2908
2909
2910 /**
2911  * nes_modify_qp
2912  */
2913 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2914                 int attr_mask, struct ib_udata *udata)
2915 {
2916         struct nes_qp *nesqp = to_nesqp(ibqp);
2917         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2918         struct nes_device *nesdev = nesvnic->nesdev;
2919         /* u32 cqp_head; */
2920         /* u32 counter; */
2921         u32 next_iwarp_state = 0;
2922         int err;
2923         unsigned long qplockflags;
2924         int ret;
2925         u16 original_last_aeq;
2926         u8 issue_modify_qp = 0;
2927         u8 issue_disconnect = 0;
2928         u8 dont_wait = 0;
2929
2930         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2931                         " iwarp_state=0x%X, refcount=%d\n",
2932                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2933                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2934
2935         spin_lock_irqsave(&nesqp->lock, qplockflags);
2936
2937         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2938                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2939                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2940                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2941
2942         if (attr_mask & IB_QP_STATE) {
2943                 switch (attr->qp_state) {
2944                         case IB_QPS_INIT:
2945                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2946                                                 nesqp->hwqp.qp_id);
2947                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2948                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2949                                         return -EINVAL;
2950                                 }
2951                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2952                                 issue_modify_qp = 1;
2953                                 break;
2954                         case IB_QPS_RTR:
2955                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2956                                                 nesqp->hwqp.qp_id);
2957                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2958                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2959                                         return -EINVAL;
2960                                 }
2961                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2962                                 issue_modify_qp = 1;
2963                                 break;
2964                         case IB_QPS_RTS:
2965                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2966                                                 nesqp->hwqp.qp_id);
2967                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2968                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2969                                         return -EINVAL;
2970                                 }
2971                                 if (nesqp->cm_id == NULL) {
2972                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2973                                                         nesqp->hwqp.qp_id );
2974                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2975                                         return -EINVAL;
2976                                 }
2977                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2978                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2979                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2980                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2981                                 issue_modify_qp = 1;
2982                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2983                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2984                                 nesqp->hte_added = 1;
2985                                 break;
2986                         case IB_QPS_SQD:
2987                                 issue_modify_qp = 1;
2988                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2989                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2990                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2991                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2992                                         return 0;
2993                                 } else {
2994                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2995                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2996                                                                 " ignored due to current iWARP state\n",
2997                                                                 nesqp->hwqp.qp_id);
2998                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2999                                                 return -EINVAL;
3000                                         }
3001                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
3002                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3003                                                                 " already done based on hw state.\n",
3004                                                                 nesqp->hwqp.qp_id);
3005                                                 issue_modify_qp = 0;
3006                                                 nesqp->in_disconnect = 0;
3007                                         }
3008                                         switch (nesqp->hw_iwarp_state) {
3009                                                 case NES_AEQE_IWARP_STATE_CLOSING:
3010                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3011                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
3012                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3013                                                         break;
3014                                                 case NES_AEQE_IWARP_STATE_ERROR:
3015                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3016                                                         break;
3017                                                 default:
3018                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3019                                                         nesqp->in_disconnect = 1;
3020                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
3021                                                         break;
3022                                         }
3023                                 }
3024                                 break;
3025                         case IB_QPS_SQE:
3026                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
3027                                                 nesqp->hwqp.qp_id);
3028                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
3029                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3030                                         return -EINVAL;
3031                                 }
3032                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3033                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3034                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
3035                                 issue_modify_qp = 1;
3036                                 nesqp->in_disconnect = 1;
3037                                 break;
3038                         case IB_QPS_ERR:
3039                         case IB_QPS_RESET:
3040                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
3041                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3042                                         return -EINVAL;
3043                                 }
3044                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
3045                                                 nesqp->hwqp.qp_id);
3046                                 if (nesqp->term_flags)
3047                                         del_timer(&nesqp->terminate_timer);
3048
3049                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3050                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3051                                         if (nesqp->hte_added) {
3052                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
3053                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
3054                                                 nesqp->hte_added = 0;
3055                                         }
3056                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
3057                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
3058                                         next_iwarp_state |= NES_CQP_QP_RESET;
3059                                         nesqp->in_disconnect = 1;
3060                                 } else {
3061                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
3062                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
3063                                         dont_wait = 1;
3064                                 }
3065                                 issue_modify_qp = 1;
3066                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
3067                                 break;
3068                         default:
3069                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3070                                 return -EINVAL;
3071                                 break;
3072                 }
3073
3074                 nesqp->ibqp_state = attr->qp_state;
3075                 if (((nesqp->iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) ==
3076                                 (u32)NES_CQP_QP_IWARP_STATE_RTS) &&
3077                                 ((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) >
3078                                 (u32)NES_CQP_QP_IWARP_STATE_RTS)) {
3079                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3080                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3081                                         nesqp->iwarp_state);
3082                         issue_disconnect = 1;
3083                 } else {
3084                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3085                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3086                                         nesqp->iwarp_state);
3087                 }
3088         }
3089
3090         if (attr_mask & IB_QP_ACCESS_FLAGS) {
3091                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
3092                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3093                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3094                         issue_modify_qp = 1;
3095                 }
3096                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
3097                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
3098                         issue_modify_qp = 1;
3099                 }
3100                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
3101                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
3102                         issue_modify_qp = 1;
3103                 }
3104                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
3105                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
3106                         issue_modify_qp = 1;
3107                 }
3108
3109                 if (nesqp->user_mode) {
3110                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3111                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3112                         issue_modify_qp = 1;
3113                 }
3114         }
3115
3116         original_last_aeq = nesqp->last_aeq;
3117         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3118
3119         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
3120
3121         ret = 0;
3122
3123
3124         if (issue_modify_qp) {
3125                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
3126                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
3127                 if (ret)
3128                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
3129                                         " failed for QP%u.\n",
3130                                         next_iwarp_state, nesqp->hwqp.qp_id);
3131
3132         }
3133
3134         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
3135                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
3136                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3137                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3138                                 original_last_aeq, nesqp->last_aeq);
3139                 if ((!ret) ||
3140                                 ((original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) &&
3141                                 (ret))) {
3142                         if (dont_wait) {
3143                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
3144                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
3145                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3146                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3147                                                         original_last_aeq, nesqp->last_aeq);
3148                                         /* this one is for the cm_disconnect thread */
3149                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
3150                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
3151                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
3152                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3153                                         nes_cm_disconn(nesqp);
3154                                 } else {
3155                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
3156                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3157                                 }
3158                         } else {
3159                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
3160                                 if (nesqp->cm_id) {
3161                                         /* These two are for the timer thread */
3162                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3163                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
3164                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3165                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
3166                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
3167                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3168                                                                 original_last_aeq, nesqp->last_aeq);
3169                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3170                                         }
3171                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3172                                 } else {
3173                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3174                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3175                                                         " need ae to finish up, original_last_aeq = 0x%04X."
3176                                                         " last_aeq = 0x%04X.\n",
3177                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3178                                                         original_last_aeq, nesqp->last_aeq);
3179                                 }
3180                         }
3181                 } else {
3182                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3183                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3184                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3185                                         original_last_aeq, nesqp->last_aeq);
3186                 }
3187         } else {
3188                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3189                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3190                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3191                                 original_last_aeq, nesqp->last_aeq);
3192         }
3193
3194         err = 0;
3195
3196         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3197                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3198
3199         return err;
3200 }
3201
3202
3203 /**
3204  * nes_muticast_attach
3205  */
3206 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3207 {
3208         nes_debug(NES_DBG_INIT, "\n");
3209         return -ENOSYS;
3210 }
3211
3212
3213 /**
3214  * nes_multicast_detach
3215  */
3216 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3217 {
3218         nes_debug(NES_DBG_INIT, "\n");
3219         return -ENOSYS;
3220 }
3221
3222
3223 /**
3224  * nes_process_mad
3225  */
3226 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3227                 u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
3228                 struct ib_mad *in_mad, struct ib_mad *out_mad)
3229 {
3230         nes_debug(NES_DBG_INIT, "\n");
3231         return -ENOSYS;
3232 }
3233
3234 static inline void
3235 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3236 {
3237         int sge_index;
3238         int total_payload_length = 0;
3239         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3240                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3241                         ib_wr->sg_list[sge_index].addr);
3242                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3243                         ib_wr->sg_list[sge_index].length);
3244                 if (uselkey)
3245                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3246                                                 (ib_wr->sg_list[sge_index].lkey));
3247                 else
3248                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3249
3250                 total_payload_length += ib_wr->sg_list[sge_index].length;
3251         }
3252         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3253                         total_payload_length);
3254         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3255                                 total_payload_length);
3256 }
3257
3258 /**
3259  * nes_post_send
3260  */
3261 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3262                 struct ib_send_wr **bad_wr)
3263 {
3264         u64 u64temp;
3265         unsigned long flags = 0;
3266         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3267         struct nes_device *nesdev = nesvnic->nesdev;
3268         struct nes_qp *nesqp = to_nesqp(ibqp);
3269         struct nes_hw_qp_wqe *wqe;
3270         int err = 0;
3271         u32 qsize = nesqp->hwqp.sq_size;
3272         u32 head;
3273         u32 wqe_misc = 0;
3274         u32 wqe_count = 0;
3275         u32 counter;
3276
3277         if (nesqp->ibqp_state > IB_QPS_RTS) {
3278                 err = -EINVAL;
3279                 goto out;
3280         }
3281
3282         spin_lock_irqsave(&nesqp->lock, flags);
3283
3284         head = nesqp->hwqp.sq_head;
3285
3286         while (ib_wr) {
3287                 /* Check for QP error */
3288                 if (nesqp->term_flags) {
3289                         err = -EINVAL;
3290                         break;
3291                 }
3292
3293                 /* Check for SQ overflow */
3294                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3295                         err = -EINVAL;
3296                         break;
3297                 }
3298
3299                 wqe = &nesqp->hwqp.sq_vbase[head];
3300                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3301                                 nesqp->hwqp.qp_id, wqe, head); */
3302                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3303                 u64temp = (u64)(ib_wr->wr_id);
3304                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3305                                         u64temp);
3306                 switch (ib_wr->opcode) {
3307                 case IB_WR_SEND:
3308                 case IB_WR_SEND_WITH_INV:
3309                         if (IB_WR_SEND == ib_wr->opcode) {
3310                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3311                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3312                                 else
3313                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3314                         } else {
3315                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3316                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3317                                 else
3318                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3319
3320                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3321                                                     ib_wr->ex.invalidate_rkey);
3322                         }
3323
3324                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3325                                 err = -EINVAL;
3326                                 break;
3327                         }
3328
3329                         if (ib_wr->send_flags & IB_SEND_FENCE)
3330                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3331
3332                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3333                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3334                              (ib_wr->sg_list[0].length <= 64)) {
3335                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3336                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3337                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3338                                                     ib_wr->sg_list[0].length);
3339                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3340                         } else {
3341                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3342                         }
3343
3344                         break;
3345                 case IB_WR_RDMA_WRITE:
3346                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3347                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3348                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3349                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3350                                 err = -EINVAL;
3351                                 break;
3352                         }
3353
3354                         if (ib_wr->send_flags & IB_SEND_FENCE)
3355                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3356
3357                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3358                                             ib_wr->wr.rdma.rkey);
3359                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3360                                             ib_wr->wr.rdma.remote_addr);
3361
3362                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3363                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3364                              (ib_wr->sg_list[0].length <= 64)) {
3365                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3366                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3367                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3368                                                     ib_wr->sg_list[0].length);
3369                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3370                         } else {
3371                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3372                         }
3373
3374                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3375                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3376                         break;
3377                 case IB_WR_RDMA_READ:
3378                 case IB_WR_RDMA_READ_WITH_INV:
3379                         /* iWARP only supports 1 sge for RDMA reads */
3380                         if (ib_wr->num_sge > 1) {
3381                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3382                                           ib_wr->num_sge);
3383                                 err = -EINVAL;
3384                                 break;
3385                         }
3386                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3387                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3388                         } else {
3389                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3390                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3391                                                     ib_wr->ex.invalidate_rkey);
3392                         }
3393
3394                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3395                                             ib_wr->wr.rdma.remote_addr);
3396                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3397                                             ib_wr->wr.rdma.rkey);
3398                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3399                                             ib_wr->sg_list->length);
3400                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3401                                             ib_wr->sg_list->addr);
3402                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3403                                             ib_wr->sg_list->lkey);
3404                         break;
3405                 case IB_WR_LOCAL_INV:
3406                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3407                         set_wqe_32bit_value(wqe->wqe_words,
3408                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3409                                             ib_wr->ex.invalidate_rkey);
3410                         break;
3411                 case IB_WR_FAST_REG_MR:
3412                 {
3413                         int i;
3414                         int flags = ib_wr->wr.fast_reg.access_flags;
3415                         struct nes_ib_fast_reg_page_list *pnesfrpl =
3416                                 container_of(ib_wr->wr.fast_reg.page_list,
3417                                              struct nes_ib_fast_reg_page_list,
3418                                              ibfrpl);
3419                         u64 *src_page_list = pnesfrpl->ibfrpl.page_list;
3420                         u64 *dst_page_list = pnesfrpl->nes_wqe_pbl.kva;
3421
3422                         if (ib_wr->wr.fast_reg.page_list_len >
3423                             (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3424                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3425                                 err = -EINVAL;
3426                                 break;
3427                         }
3428                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3429                         set_wqe_64bit_value(wqe->wqe_words,
3430                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3431                                             ib_wr->wr.fast_reg.iova_start);
3432                         set_wqe_32bit_value(wqe->wqe_words,
3433                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3434                                             ib_wr->wr.fast_reg.length);
3435                         set_wqe_32bit_value(wqe->wqe_words,
3436                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3437                                             ib_wr->wr.fast_reg.rkey);
3438                         /* Set page size: */
3439                         if (ib_wr->wr.fast_reg.page_shift == 12) {
3440                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3441                         } else if (ib_wr->wr.fast_reg.page_shift == 21) {
3442                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3443                         } else {
3444                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3445                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3446                                 err = -EINVAL;
3447                                 break;
3448                         }
3449                         /* Set access_flags */
3450                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3451                         if (flags & IB_ACCESS_LOCAL_WRITE)
3452                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3453
3454                         if (flags & IB_ACCESS_REMOTE_WRITE)
3455                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3456
3457                         if (flags & IB_ACCESS_REMOTE_READ)
3458                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3459
3460                         if (flags & IB_ACCESS_MW_BIND)
3461                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3462
3463                         /* Fill in PBL info: */
3464                         if (ib_wr->wr.fast_reg.page_list_len >
3465                             pnesfrpl->ibfrpl.max_page_list_len) {
3466                                 nes_debug(NES_DBG_IW_TX, "Invalid page list length,"
3467                                           " ib_wr=%p, value=%u, max=%u\n",
3468                                           ib_wr, ib_wr->wr.fast_reg.page_list_len,
3469                                           pnesfrpl->ibfrpl.max_page_list_len);
3470                                 err = -EINVAL;
3471                                 break;
3472                         }
3473
3474                         set_wqe_64bit_value(wqe->wqe_words,
3475                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3476                                             pnesfrpl->nes_wqe_pbl.paddr);
3477
3478                         set_wqe_32bit_value(wqe->wqe_words,
3479                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3480                                             ib_wr->wr.fast_reg.page_list_len * 8);
3481
3482                         for (i = 0; i < ib_wr->wr.fast_reg.page_list_len; i++)
3483                                 dst_page_list[i] = cpu_to_le64(src_page_list[i]);
3484
3485                         nes_debug(NES_DBG_IW_TX, "SQ_FMR: iova_start: %p, "
3486                                   "length: %d, rkey: %0x, pgl_paddr: %p, "
3487                                   "page_list_len: %u, wqe_misc: %x\n",
3488                                   (void *)ib_wr->wr.fast_reg.iova_start,
3489                                   ib_wr->wr.fast_reg.length,
3490                                   ib_wr->wr.fast_reg.rkey,
3491                                   (void *)pnesfrpl->nes_wqe_pbl.paddr,
3492                                   ib_wr->wr.fast_reg.page_list_len,
3493                                   wqe_misc);
3494                         break;
3495                 }
3496                 default:
3497                         /* error */
3498                         err = -EINVAL;
3499                         break;
3500                 }
3501
3502                 if (err)
3503                         break;
3504
3505                 if (ib_wr->send_flags & IB_SEND_SIGNALED) {
3506                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3507                 }
3508                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3509
3510                 ib_wr = ib_wr->next;
3511                 head++;
3512                 wqe_count++;
3513                 if (head >= qsize)
3514                         head = 0;
3515
3516         }
3517
3518         nesqp->hwqp.sq_head = head;
3519         barrier();
3520         while (wqe_count) {
3521                 counter = min(wqe_count, ((u32)255));
3522                 wqe_count -= counter;
3523                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3524                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3525         }
3526
3527         spin_unlock_irqrestore(&nesqp->lock, flags);
3528
3529 out:
3530         if (err)
3531                 *bad_wr = ib_wr;
3532         return err;
3533 }
3534
3535
3536 /**
3537  * nes_post_recv
3538  */
3539 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3540                 struct ib_recv_wr **bad_wr)
3541 {
3542         u64 u64temp;
3543         unsigned long flags = 0;
3544         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3545         struct nes_device *nesdev = nesvnic->nesdev;
3546         struct nes_qp *nesqp = to_nesqp(ibqp);
3547         struct nes_hw_qp_wqe *wqe;
3548         int err = 0;
3549         int sge_index;
3550         u32 qsize = nesqp->hwqp.rq_size;
3551         u32 head;
3552         u32 wqe_count = 0;
3553         u32 counter;
3554         u32 total_payload_length;
3555
3556         if (nesqp->ibqp_state > IB_QPS_RTS) {
3557                 err = -EINVAL;
3558                 goto out;
3559         }
3560
3561         spin_lock_irqsave(&nesqp->lock, flags);
3562
3563         head = nesqp->hwqp.rq_head;
3564
3565         while (ib_wr) {
3566                 /* Check for QP error */
3567                 if (nesqp->term_flags) {
3568                         err = -EINVAL;
3569                         break;
3570                 }
3571
3572                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3573                         err = -EINVAL;
3574                         break;
3575                 }
3576                 /* Check for RQ overflow */
3577                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3578                         err = -EINVAL;
3579                         break;
3580                 }
3581
3582                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3583                 wqe = &nesqp->hwqp.rq_vbase[head];
3584
3585                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3586                                 nesqp->hwqp.qp_id, wqe, head); */
3587                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3588                 u64temp = (u64)(ib_wr->wr_id);
3589                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3590                                         u64temp);
3591                 total_payload_length = 0;
3592                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3593                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3594                                         ib_wr->sg_list[sge_index].addr);
3595                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3596                                         ib_wr->sg_list[sge_index].length);
3597                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3598                                         ib_wr->sg_list[sge_index].lkey);
3599
3600                         total_payload_length += ib_wr->sg_list[sge_index].length;
3601                 }
3602                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3603                                         total_payload_length);
3604
3605                 ib_wr = ib_wr->next;
3606                 head++;
3607                 wqe_count++;
3608                 if (head >= qsize)
3609                         head = 0;
3610         }
3611
3612         nesqp->hwqp.rq_head = head;
3613         barrier();
3614         while (wqe_count) {
3615                 counter = min(wqe_count, ((u32)255));
3616                 wqe_count -= counter;
3617                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3618         }
3619
3620         spin_unlock_irqrestore(&nesqp->lock, flags);
3621
3622 out:
3623         if (err)
3624                 *bad_wr = ib_wr;
3625         return err;
3626 }
3627
3628
3629 /**
3630  * nes_poll_cq
3631  */
3632 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3633 {
3634         u64 u64temp;
3635         u64 wrid;
3636         unsigned long flags = 0;
3637         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3638         struct nes_device *nesdev = nesvnic->nesdev;
3639         struct nes_cq *nescq = to_nescq(ibcq);
3640         struct nes_qp *nesqp;
3641         struct nes_hw_cqe cqe;
3642         u32 head;
3643         u32 wq_tail = 0;
3644         u32 cq_size;
3645         u32 cqe_count = 0;
3646         u32 wqe_index;
3647         u32 u32temp;
3648         u32 move_cq_head = 1;
3649         u32 err_code;
3650
3651         nes_debug(NES_DBG_CQ, "\n");
3652
3653         spin_lock_irqsave(&nescq->lock, flags);
3654
3655         head = nescq->hw_cq.cq_head;
3656         cq_size = nescq->hw_cq.cq_size;
3657
3658         while (cqe_count < num_entries) {
3659                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3660                                 NES_CQE_VALID) == 0)
3661                         break;
3662
3663                 /*
3664                  * Make sure we read CQ entry contents *after*
3665                  * we've checked the valid bit.
3666                  */
3667                 rmb();
3668
3669                 cqe = nescq->hw_cq.cq_vbase[head];
3670                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3671                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3672                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3673                 /* parse CQE, get completion context from WQE (either rq or sq) */
3674                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3675                                 ((u64)u32temp);
3676
3677                 if (u64temp) {
3678                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3679                         memset(entry, 0, sizeof *entry);
3680                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3681                                 entry->status = IB_WC_SUCCESS;
3682                         } else {
3683                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3684                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3685                                         entry->status = err_code & 0x0000ffff;
3686
3687                                         /* The rest of the cqe's will be marked as flushed */
3688                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3689                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3690                                                             NES_IWARP_CQE_MINOR_FLUSH);
3691                                 } else
3692                                         entry->status = IB_WC_WR_FLUSH_ERR;
3693                         }
3694
3695                         entry->qp = &nesqp->ibqp;
3696                         entry->src_qp = nesqp->hwqp.qp_id;
3697
3698                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3699                                 if (nesqp->skip_lsmm) {
3700                                         nesqp->skip_lsmm = 0;
3701                                         nesqp->hwqp.sq_tail++;
3702                                 }
3703
3704                                 /* Working on a SQ Completion*/
3705                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3706                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3707                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3708                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3709                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3710                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3711
3712                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3713                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3714                                         case NES_IWARP_SQ_OP_RDMAW:
3715                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3716                                                 entry->opcode = IB_WC_RDMA_WRITE;
3717                                                 break;
3718                                         case NES_IWARP_SQ_OP_RDMAR:
3719                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3720                                                 entry->opcode = IB_WC_RDMA_READ;
3721                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3722                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3723                                                 break;
3724                                         case NES_IWARP_SQ_OP_SENDINV:
3725                                         case NES_IWARP_SQ_OP_SENDSEINV:
3726                                         case NES_IWARP_SQ_OP_SEND:
3727                                         case NES_IWARP_SQ_OP_SENDSE:
3728                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3729                                                 entry->opcode = IB_WC_SEND;
3730                                                 break;
3731                                         case NES_IWARP_SQ_OP_LOCINV:
3732                                                 entry->opcode = IB_WR_LOCAL_INV;
3733                                                 break;
3734                                         case NES_IWARP_SQ_OP_FAST_REG:
3735                                                 entry->opcode = IB_WC_FAST_REG_MR;
3736                                                 break;
3737                                 }
3738
3739                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3740                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3741                                         move_cq_head = 0;
3742                                         wq_tail = nesqp->hwqp.sq_tail;
3743                                 }
3744                         } else {
3745                                 /* Working on a RQ Completion*/
3746                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3747                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3748                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3749                                         entry->opcode = IB_WC_RECV;
3750
3751                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3752                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3753                                         move_cq_head = 0;
3754                                         wq_tail = nesqp->hwqp.rq_tail;
3755                                 }
3756                         }
3757
3758                         entry->wr_id = wrid;
3759                         entry++;
3760                         cqe_count++;
3761                 }
3762
3763                 if (move_cq_head) {
3764                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3765                         if (++head >= cq_size)
3766                                 head = 0;
3767                         nescq->polled_completions++;
3768
3769                         if ((nescq->polled_completions > (cq_size / 2)) ||
3770                                         (nescq->polled_completions == 255)) {
3771                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3772                                         " are pending %u of %u.\n",
3773                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3774                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3775                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3776                                 nescq->polled_completions = 0;
3777                         }
3778                 } else {
3779                         /* Update the wqe index and set status to flush */
3780                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3781                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3782                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3783                                 cpu_to_le32(wqe_index);
3784                         move_cq_head = 1; /* ready for next pass */
3785                 }
3786         }
3787
3788         if (nescq->polled_completions) {
3789                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3790                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3791                 nescq->polled_completions = 0;
3792         }
3793
3794         nescq->hw_cq.cq_head = head;
3795         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3796                         cqe_count, nescq->hw_cq.cq_number);
3797
3798         spin_unlock_irqrestore(&nescq->lock, flags);
3799
3800         return cqe_count;
3801 }
3802
3803
3804 /**
3805  * nes_req_notify_cq
3806  */
3807 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3808                 {
3809         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3810         struct nes_device *nesdev = nesvnic->nesdev;
3811         struct nes_cq *nescq = to_nescq(ibcq);
3812         u32 cq_arm;
3813
3814         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3815                         nescq->hw_cq.cq_number);
3816
3817         cq_arm = nescq->hw_cq.cq_number;
3818         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3819                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3820         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3821                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3822         else
3823                 return -EINVAL;
3824
3825         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3826         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3827
3828         return 0;
3829 }
3830
3831
3832 /**
3833  * nes_init_ofa_device
3834  */
3835 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3836 {
3837         struct nes_ib_device *nesibdev;
3838         struct nes_vnic *nesvnic = netdev_priv(netdev);
3839         struct nes_device *nesdev = nesvnic->nesdev;
3840
3841         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3842         if (nesibdev == NULL) {
3843                 return NULL;
3844         }
3845         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3846         nesibdev->ibdev.owner = THIS_MODULE;
3847
3848         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3849         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3850         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3851
3852         nesibdev->ibdev.uverbs_cmd_mask =
3853                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3854                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3855                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3856                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3857                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3858                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3859                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3860                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3861                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3862                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3863                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3864                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3865                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3866                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3867                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3868                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3869                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3870                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3871                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3872                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3873                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3874                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3875
3876         nesibdev->ibdev.phys_port_cnt = 1;
3877         nesibdev->ibdev.num_comp_vectors = 1;
3878         nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3879         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3880         nesibdev->ibdev.query_device = nes_query_device;
3881         nesibdev->ibdev.query_port = nes_query_port;
3882         nesibdev->ibdev.modify_port = nes_modify_port;
3883         nesibdev->ibdev.query_pkey = nes_query_pkey;
3884         nesibdev->ibdev.query_gid = nes_query_gid;
3885         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3886         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3887         nesibdev->ibdev.mmap = nes_mmap;
3888         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3889         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3890         nesibdev->ibdev.create_ah = nes_create_ah;
3891         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3892         nesibdev->ibdev.create_qp = nes_create_qp;
3893         nesibdev->ibdev.modify_qp = nes_modify_qp;
3894         nesibdev->ibdev.query_qp = nes_query_qp;
3895         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3896         nesibdev->ibdev.create_cq = nes_create_cq;
3897         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3898         nesibdev->ibdev.poll_cq = nes_poll_cq;
3899         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3900         nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
3901         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3902         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3903         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3904         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3905         nesibdev->ibdev.bind_mw = nes_bind_mw;
3906
3907         nesibdev->ibdev.alloc_fast_reg_mr = nes_alloc_fast_reg_mr;
3908         nesibdev->ibdev.alloc_fast_reg_page_list = nes_alloc_fast_reg_page_list;
3909         nesibdev->ibdev.free_fast_reg_page_list = nes_free_fast_reg_page_list;
3910
3911         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3912         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3913         nesibdev->ibdev.process_mad = nes_process_mad;
3914
3915         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3916         nesibdev->ibdev.post_send = nes_post_send;
3917         nesibdev->ibdev.post_recv = nes_post_recv;
3918
3919         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3920         if (nesibdev->ibdev.iwcm == NULL) {
3921                 ib_dealloc_device(&nesibdev->ibdev);
3922                 return NULL;
3923         }
3924         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3925         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3926         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3927         nesibdev->ibdev.iwcm->connect = nes_connect;
3928         nesibdev->ibdev.iwcm->accept = nes_accept;
3929         nesibdev->ibdev.iwcm->reject = nes_reject;
3930         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3931         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3932
3933         return nesibdev;
3934 }
3935
3936
3937 /**
3938  * nes_destroy_ofa_device
3939  */
3940 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3941 {
3942         if (nesibdev == NULL)
3943                 return;
3944
3945         nes_unregister_ofa_device(nesibdev);
3946
3947         kfree(nesibdev->ibdev.iwcm);
3948         ib_dealloc_device(&nesibdev->ibdev);
3949 }
3950
3951
3952 /**
3953  * nes_register_ofa_device
3954  */
3955 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3956 {
3957         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3958         struct nes_device *nesdev = nesvnic->nesdev;
3959         struct nes_adapter *nesadapter = nesdev->nesadapter;
3960         int i, ret;
3961
3962         ret = ib_register_device(&nesvnic->nesibdev->ibdev);
3963         if (ret) {
3964                 return ret;
3965         }
3966
3967         /* Get the resources allocated to this device */
3968         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3969         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3970         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3971         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3972
3973         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3974                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3975                 if (ret) {
3976                         while (i > 0) {
3977                                 i--;
3978                                 device_remove_file(&nesibdev->ibdev.dev,
3979                                                    nes_dev_attributes[i]);
3980                         }
3981                         ib_unregister_device(&nesibdev->ibdev);
3982                         return ret;
3983                 }
3984         }
3985
3986         nesvnic->of_device_registered = 1;
3987
3988         return 0;
3989 }
3990
3991
3992 /**
3993  * nes_unregister_ofa_device
3994  */
3995 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3996 {
3997         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3998         int i;
3999
4000         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4001                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4002         }
4003
4004         if (nesvnic->of_device_registered) {
4005                 ib_unregister_device(&nesibdev->ibdev);
4006         }
4007
4008         nesvnic->of_device_registered = 0;
4009 }