drivers/infiniband/hw/nes/nes_verbs.c

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