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