drivers/infiniband/hw/nes/nes_verbs.c

   1 /*
   2  * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/random.h>
  37 #include <linux/highmem.h>
  38 #include <linux/slab.h>
  39 #include <asm/byteorder.h>
  40
  41 #include <rdma/ib_verbs.h>
  42 #include <rdma/iw_cm.h>
  43 #include <rdma/ib_user_verbs.h>
  44
  45 #include "nes.h"
  46
  47 #include <rdma/ib_umem.h>
  48
  49 atomic_t mod_qp_timouts;
  50 atomic_t qps_created;
  51 atomic_t sw_qps_destroyed;
  52
  53 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
  54 static int nes_dereg_mr(struct ib_mr *ib_mr);
  55
  56 /**
  57  * nes_alloc_mw
  58  */
  59 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
  60                                   struct ib_udata *udata)
  61 {
  62         struct nes_pd *nespd = to_nespd(ibpd);
  63         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
  64         struct nes_device *nesdev = nesvnic->nesdev;
  65         struct nes_adapter *nesadapter = nesdev->nesadapter;
  66         struct nes_cqp_request *cqp_request;
  67         struct nes_mr *nesmr;
  68         struct ib_mw *ibmw;
  69         struct nes_hw_cqp_wqe *cqp_wqe;
  70         int ret;
  71         u32 stag;
  72         u32 stag_index = 0;
  73         u32 next_stag_index = 0;
  74         u32 driver_key = 0;
  75         u8 stag_key = 0;
  76
  77         if (type != IB_MW_TYPE_1)
  78                 return ERR_PTR(-EINVAL);
  79
  80         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
  81         stag_key = (u8)next_stag_index;
  82
  83         driver_key = 0;
  84
  85         next_stag_index >>= 8;
  86         next_stag_index %= nesadapter->max_mr;
  87
  88         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
  89                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_MW);
  90         if (ret) {
  91                 return ERR_PTR(ret);
  92         }
  93
  94         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
  95         if (!nesmr) {
  96                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
  97                 return ERR_PTR(-ENOMEM);
  98         }
  99
 100         stag = stag_index << 8;
 101         stag |= driver_key;
 102         stag += (u32)stag_key;
 103
 104         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
 105                         stag, stag_index);
 106
 107         /* Register the region with the adapter */
 108         cqp_request = nes_get_cqp_request(nesdev);
 109         if (cqp_request == NULL) {
 110                 kfree(nesmr);
 111                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 112                 return ERR_PTR(-ENOMEM);
 113         }
 114
 115         cqp_request->waiting = 1;
 116         cqp_wqe = &cqp_request->cqp_wqe;
 117
 118         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
 119                         cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
 120                         NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
 121                         NES_CQP_STAG_REM_ACC_EN);
 122
 123         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 124         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
 125         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 126
 127         atomic_set(&cqp_request->refcount, 2);
 128         nes_post_cqp_request(nesdev, cqp_request);
 129
 130         /* Wait for CQP */
 131         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
 132                         NES_EVENT_TIMEOUT);
 133         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
 134                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 135                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
 136         if ((!ret) || (cqp_request->major_code)) {
 137                 nes_put_cqp_request(nesdev, cqp_request);
 138                 kfree(nesmr);
 139                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 140                 if (!ret) {
 141                         return ERR_PTR(-ETIME);
 142                 } else {
 143                         return ERR_PTR(-ENOMEM);
 144                 }
 145         }
 146         nes_put_cqp_request(nesdev, cqp_request);
 147
 148         nesmr->ibmw.rkey = stag;
 149         nesmr->mode = IWNES_MEMREG_TYPE_MW;
 150         ibmw = &nesmr->ibmw;
 151         nesmr->pbl_4k = 0;
 152         nesmr->pbls_used = 0;
 153
 154         return ibmw;
 155 }
 156
 157
 158 /**
 159  * nes_dealloc_mw
 160  */
 161 static int nes_dealloc_mw(struct ib_mw *ibmw)
 162 {
 163         struct nes_mr *nesmr = to_nesmw(ibmw);
 164         struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
 165         struct nes_device *nesdev = nesvnic->nesdev;
 166         struct nes_adapter *nesadapter = nesdev->nesadapter;
 167         struct nes_hw_cqp_wqe *cqp_wqe;
 168         struct nes_cqp_request *cqp_request;
 169         int err = 0;
 170         int ret;
 171
 172         /* Deallocate the window with the adapter */
 173         cqp_request = nes_get_cqp_request(nesdev);
 174         if (cqp_request == NULL) {
 175                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 176                 return -ENOMEM;
 177         }
 178         cqp_request->waiting = 1;
 179         cqp_wqe = &cqp_request->cqp_wqe;
 180         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 181         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
 182         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
 183
 184         atomic_set(&cqp_request->refcount, 2);
 185         nes_post_cqp_request(nesdev, cqp_request);
 186
 187         /* Wait for CQP */
 188         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
 189                         ibmw->rkey);
 190         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
 191                         NES_EVENT_TIMEOUT);
 192         nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
 193                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 194                         ret, cqp_request->major_code, cqp_request->minor_code);
 195         if (!ret)
 196                 err = -ETIME;
 197         else if (cqp_request->major_code)
 198                 err = -EIO;
 199
 200         nes_put_cqp_request(nesdev, cqp_request);
 201
 202         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
 203                         (ibmw->rkey & 0x0fffff00) >> 8);
 204         kfree(nesmr);
 205
 206         return err;
 207 }
 208
 209
 210 /*
 211  * nes_alloc_fast_mr
 212  */
 213 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
 214                              u32 stag, u32 page_count)
 215 {
 216         struct nes_hw_cqp_wqe *cqp_wqe;
 217         struct nes_cqp_request *cqp_request;
 218         unsigned long flags;
 219         int ret;
 220         struct nes_adapter *nesadapter = nesdev->nesadapter;
 221         u32 opcode = 0;
 222         u16 major_code;
 223         u64 region_length = page_count * PAGE_SIZE;
 224
 225
 226         cqp_request = nes_get_cqp_request(nesdev);
 227         if (cqp_request == NULL) {
 228                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 229                 return -ENOMEM;
 230         }
 231         nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
 232                               "region_length = %llu\n",
 233                               page_count, region_length);
 234         cqp_request->waiting = 1;
 235         cqp_wqe = &cqp_request->cqp_wqe;
 236
 237         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 238         if (nesadapter->free_4kpbl > 0) {
 239                 nesadapter->free_4kpbl--;
 240                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 241         } else {
 242                 /* No 4kpbl's available: */
 243                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 244                 nes_debug(NES_DBG_MR, "Out of Pbls\n");
 245                 nes_free_cqp_request(nesdev, cqp_request);
 246                 return -ENOMEM;
 247         }
 248
 249         opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
 250                  NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
 251                  NES_CQP_STAG_REM_ACC_EN;
 252         /*
 253          * The current OFED API does not support the zero based TO option.
 254          * If added then need to changed the NES_CQP_STAG_VA* option.  Also,
 255          * the API does not support that ability to have the MR set for local
 256          * access only when created and not allow the SQ op to override. Given
 257          * this the remote enable must be set here.
 258          */
 259
 260         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 261         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 262         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
 263
 264         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
 265                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
 266         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
 267                         cpu_to_le32(nespd->pd_id & 0x00007fff);
 268
 269         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 270         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
 271         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
 272         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
 273         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
 274         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
 275         barrier();
 276
 277         atomic_set(&cqp_request->refcount, 2);
 278         nes_post_cqp_request(nesdev, cqp_request);
 279
 280         /* Wait for CQP */
 281         ret = wait_event_timeout(cqp_request->waitq,
 282                                  (0 != cqp_request->request_done),
 283                                  NES_EVENT_TIMEOUT);
 284
 285         nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
 286                   "wait_event_timeout ret = %u, CQP Major:Minor codes = "
 287                   "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
 288                   cqp_request->minor_code);
 289         major_code = cqp_request->major_code;
 290         nes_put_cqp_request(nesdev, cqp_request);
 291
 292         if (!ret || major_code) {
 293                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 294                 nesadapter->free_4kpbl++;
 295                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 296         }
 297
 298         if (!ret)
 299                 return -ETIME;
 300         else if (major_code)
 301                 return -EIO;
 302         return 0;
 303 }
 304
 305 /*
 306  * nes_alloc_mr
 307  */
 308 static struct ib_mr *nes_alloc_mr(struct ib_pd *ibpd,
 309                                   enum ib_mr_type mr_type,
 310                                   u32 max_num_sg)
 311 {
 312         struct nes_pd *nespd = to_nespd(ibpd);
 313         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 314         struct nes_device *nesdev = nesvnic->nesdev;
 315         struct nes_adapter *nesadapter = nesdev->nesadapter;
 316
 317         u32 next_stag_index;
 318         u8 stag_key = 0;
 319         u32 driver_key = 0;
 320         int err = 0;
 321         u32 stag_index = 0;
 322         struct nes_mr *nesmr;
 323         u32 stag;
 324         int ret;
 325         struct ib_mr *ibmr;
 326
 327         if (mr_type != IB_MR_TYPE_MEM_REG)
 328                 return ERR_PTR(-EINVAL);
 329
 330         if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 331                 return ERR_PTR(-E2BIG);
 332
 333 /*
 334  * Note:  Set to always use a fixed length single page entry PBL.  This is to allow
 335  *       for the fast_reg_mr operation to always know the size of the PBL.
 336  */
 337         if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 338                 return ERR_PTR(-E2BIG);
 339
 340         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
 341         stag_key = (u8)next_stag_index;
 342         next_stag_index >>= 8;
 343         next_stag_index %= nesadapter->max_mr;
 344
 345         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
 346                                  nesadapter->max_mr, &stag_index,
 347                                  &next_stag_index, NES_RESOURCE_FAST_MR);
 348         if (err)
 349                 return ERR_PTR(err);
 350
 351         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
 352         if (!nesmr) {
 353                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 354                 return ERR_PTR(-ENOMEM);
 355         }
 356
 357         stag = stag_index << 8;
 358         stag |= driver_key;
 359         stag += (u32)stag_key;
 360
 361         nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
 362                   stag, stag_index);
 363
 364         ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_num_sg);
 365
 366         if (ret == 0) {
 367                 nesmr->ibmr.rkey = stag;
 368                 nesmr->ibmr.lkey = stag;
 369                 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
 370                 ibmr = &nesmr->ibmr;
 371         } else {
 372                 kfree(nesmr);
 373                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 374                 return ERR_PTR(-ENOMEM);
 375         }
 376
 377         nesmr->pages = pci_alloc_consistent(nesdev->pcidev,
 378                                             max_num_sg * sizeof(u64),
 379                                             &nesmr->paddr);
 380         if (!nesmr->paddr)
 381                 goto err;
 382
 383         nesmr->max_pages = max_num_sg;
 384
 385         return ibmr;
 386
 387 err:
 388         nes_dereg_mr(ibmr);
 389
 390         return ERR_PTR(-ENOMEM);
 391 }
 392
 393 static int nes_set_page(struct ib_mr *ibmr, u64 addr)
 394 {
 395         struct nes_mr *nesmr = to_nesmr(ibmr);
 396
 397         if (unlikely(nesmr->npages == nesmr->max_pages))
 398                 return -ENOMEM;
 399
 400         nesmr->pages[nesmr->npages++] = cpu_to_le64(addr);
 401
 402         return 0;
 403 }
 404
 405 static int nes_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 406                          int sg_nents, unsigned int *sg_offset)
 407 {
 408         struct nes_mr *nesmr = to_nesmr(ibmr);
 409
 410         nesmr->npages = 0;
 411
 412         return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, nes_set_page);
 413 }
 414
 415 /**
 416  * nes_query_device
 417  */
 418 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
 419                             struct ib_udata *uhw)
 420 {
 421         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 422         struct nes_device *nesdev = nesvnic->nesdev;
 423         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 424
 425         if (uhw->inlen || uhw->outlen)
 426                 return -EINVAL;
 427
 428         memset(props, 0, sizeof(*props));
 429         memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
 430
 431         props->fw_ver = nesdev->nesadapter->firmware_version;
 432         props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
 433         props->vendor_id = nesdev->nesadapter->vendor_id;
 434         props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
 435         props->hw_ver = nesdev->nesadapter->hw_rev;
 436         props->max_mr_size = 0x80000000;
 437         props->max_qp = nesibdev->max_qp;
 438         props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 439         props->max_sge = nesdev->nesadapter->max_sge;
 440         props->max_cq = nesibdev->max_cq;
 441         props->max_cqe = nesdev->nesadapter->max_cqe;
 442         props->max_mr = nesibdev->max_mr;
 443         props->max_mw = nesibdev->max_mr;
 444         props->max_pd = nesibdev->max_pd;
 445         props->max_sge_rd = 1;
 446         switch (nesdev->nesadapter->max_irrq_wr) {
 447                 case 0:
 448                         props->max_qp_rd_atom = 2;
 449                         break;
 450                 case 1:
 451                         props->max_qp_rd_atom = 8;
 452                         break;
 453                 case 2:
 454                         props->max_qp_rd_atom = 32;
 455                         break;
 456                 case 3:
 457                         props->max_qp_rd_atom = 64;
 458                         break;
 459                 default:
 460                         props->max_qp_rd_atom = 0;
 461         }
 462         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 463         props->atomic_cap = IB_ATOMIC_NONE;
 464         props->max_map_per_fmr = 1;
 465
 466         return 0;
 467 }
 468
 469
 470 /**
 471  * nes_query_port
 472  */
 473 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 474 {
 475         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 476         struct net_device *netdev = nesvnic->netdev;
 477
 478         /* props being zeroed by the caller, avoid zeroing it here */
 479
 480         props->max_mtu = IB_MTU_4096;
 481         props->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
 482
 483         props->lid = 1;
 484         if (netif_queue_stopped(netdev))
 485                 props->state = IB_PORT_DOWN;
 486         else if (nesvnic->linkup)
 487                 props->state = IB_PORT_ACTIVE;
 488         else
 489                 props->state = IB_PORT_DOWN;
 490         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 491                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 492         props->gid_tbl_len = 1;
 493         props->pkey_tbl_len = 1;
 494         props->active_width = IB_WIDTH_4X;
 495         props->active_speed = IB_SPEED_SDR;
 496         props->max_msg_sz = 0x80000000;
 497
 498         return 0;
 499 }
 500
 501 /**
 502  * nes_query_pkey
 503  */
 504 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 505 {
 506         *pkey = 0;
 507         return 0;
 508 }
 509
 510
 511 /**
 512  * nes_query_gid
 513  */
 514 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 515                 int index, union ib_gid *gid)
 516 {
 517         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 518
 519         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 520         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 521
 522         return 0;
 523 }
 524
 525
 526 /**
 527  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 528  * of all objects associated with a particular user-mode client.
 529  */
 530 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 531                 struct ib_udata *udata)
 532 {
 533         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 534         struct nes_device *nesdev = nesvnic->nesdev;
 535         struct nes_adapter *nesadapter = nesdev->nesadapter;
 536         struct nes_alloc_ucontext_req req;
 537         struct nes_alloc_ucontext_resp uresp;
 538         struct nes_ucontext *nes_ucontext;
 539         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 540
 541
 542         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 543                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 544                 return ERR_PTR(-EINVAL);
 545         }
 546
 547         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 548                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 549                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 550                 return ERR_PTR(-EINVAL);
 551         }
 552
 553
 554         memset(&uresp, 0, sizeof uresp);
 555
 556         uresp.max_qps = nesibdev->max_qp;
 557         uresp.max_pds = nesibdev->max_pd;
 558         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 559         uresp.virtwq = nesadapter->virtwq;
 560         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 561
 562         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 563         if (!nes_ucontext)
 564                 return ERR_PTR(-ENOMEM);
 565
 566         nes_ucontext->nesdev = nesdev;
 567         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 568         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 569                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 570                         PAGE_SIZE;
 571
 572
 573         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 574                 kfree(nes_ucontext);
 575                 return ERR_PTR(-EFAULT);
 576         }
 577
 578         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 579         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 580         atomic_set(&nes_ucontext->usecnt, 1);
 581         return &nes_ucontext->ibucontext;
 582 }
 583
 584
 585 /**
 586  * nes_dealloc_ucontext
 587  */
 588 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 589 {
 590         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 591         /* struct nes_device *nesdev = nesvnic->nesdev; */
 592         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 593
 594         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 595           return 0;
 596         kfree(nes_ucontext);
 597         return 0;
 598 }
 599
 600
 601 /**
 602  * nes_mmap
 603  */
 604 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 605 {
 606         unsigned long index;
 607         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 608         struct nes_device *nesdev = nesvnic->nesdev;
 609         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 610         struct nes_ucontext *nes_ucontext;
 611         struct nes_qp *nesqp;
 612
 613         nes_ucontext = to_nesucontext(context);
 614
 615
 616         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 617                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 618                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 619                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 620                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 621                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 622                         return -EFAULT;
 623                 }
 624                 nesqp = nes_ucontext->mmap_nesqp[index];
 625                 if (nesqp == NULL) {
 626                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 627                         return -EFAULT;
 628                 }
 629                 if (remap_pfn_range(vma, vma->vm_start,
 630                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 631                                 vma->vm_end - vma->vm_start,
 632                                 vma->vm_page_prot)) {
 633                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 634                         return -EAGAIN;
 635                 }
 636                 vma->vm_private_data = nesqp;
 637                 return 0;
 638         } else {
 639                 index = vma->vm_pgoff;
 640                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 641                         return -EFAULT;
 642
 643                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 644                 if (io_remap_pfn_range(vma, vma->vm_start,
 645                                 (nesdev->doorbell_start +
 646                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 647                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 648                         return -EAGAIN;
 649                 vma->vm_private_data = nes_ucontext;
 650                 return 0;
 651         }
 652
 653         return -ENOSYS;
 654 }
 655
 656
 657 /**
 658  * nes_alloc_pd
 659  */
 660 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 661                 struct ib_ucontext *context, struct ib_udata *udata)
 662 {
 663         struct nes_pd *nespd;
 664         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 665         struct nes_device *nesdev = nesvnic->nesdev;
 666         struct nes_adapter *nesadapter = nesdev->nesadapter;
 667         struct nes_ucontext *nesucontext;
 668         struct nes_alloc_pd_resp uresp;
 669         u32 pd_num = 0;
 670         int err;
 671
 672         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 673                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 674                         netdev_refcnt_read(nesvnic->netdev));
 675
 676         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 677                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
 678         if (err) {
 679                 return ERR_PTR(err);
 680         }
 681
 682         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 683         if (!nespd) {
 684                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 685                 return ERR_PTR(-ENOMEM);
 686         }
 687
 688         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 689                         nespd, nesvnic->nesibdev->ibdev.name);
 690
 691         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 692
 693         if (context) {
 694                 nesucontext = to_nesucontext(context);
 695                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 696                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 697                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 698                                 nespd->mmap_db_index, nespd->pd_id);
 699                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 700                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 701                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 702                         kfree(nespd);
 703                         return ERR_PTR(-ENOMEM);
 704                 }
 705
 706                 uresp.pd_id = nespd->pd_id;
 707                 uresp.mmap_db_index = nespd->mmap_db_index;
 708                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 709                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 710                         kfree(nespd);
 711                         return ERR_PTR(-EFAULT);
 712                 }
 713
 714                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 715                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 716                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 717         }
 718
 719         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 720         return &nespd->ibpd;
 721 }
 722
 723
 724 /**
 725  * nes_dealloc_pd
 726  */
 727 static int nes_dealloc_pd(struct ib_pd *ibpd)
 728 {
 729         struct nes_ucontext *nesucontext;
 730         struct nes_pd *nespd = to_nespd(ibpd);
 731         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 732         struct nes_device *nesdev = nesvnic->nesdev;
 733         struct nes_adapter *nesadapter = nesdev->nesadapter;
 734
 735         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 736                 nesucontext = to_nesucontext(ibpd->uobject->context);
 737                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 738                                 nespd->mmap_db_index);
 739                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 740                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 741                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 742                         nesucontext->first_free_db = nespd->mmap_db_index;
 743                 }
 744         }
 745
 746         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 747                         nespd->pd_id, nespd);
 748         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 749                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 750         kfree(nespd);
 751
 752         return 0;
 753 }
 754
 755
 756 /**
 757  * nes_create_ah
 758  */
 759 static struct ib_ah *nes_create_ah(struct ib_pd *pd,
 760                                    struct rdma_ah_attr *ah_attr,
 761                                    struct ib_udata *udata)
 762 {
 763         return ERR_PTR(-ENOSYS);
 764 }
 765
 766
 767 /**
 768  * nes_destroy_ah
 769  */
 770 static int nes_destroy_ah(struct ib_ah *ah)
 771 {
 772         return -ENOSYS;
 773 }
 774
 775
 776 /**
 777  * nes_get_encoded_size
 778  */
 779 static inline u8 nes_get_encoded_size(int *size)
 780 {
 781         u8 encoded_size = 0;
 782         if (*size <= 32) {
 783                 *size = 32;
 784                 encoded_size = 1;
 785         } else if (*size <= 128) {
 786                 *size = 128;
 787                 encoded_size = 2;
 788         } else if (*size <= 512) {
 789                 *size = 512;
 790                 encoded_size = 3;
 791         }
 792         return (encoded_size);
 793 }
 794
 795
 796
 797 /**
 798  * nes_setup_virt_qp
 799  */
 800 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 801                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 802 {
 803         unsigned long flags;
 804         void *mem;
 805         __le64 *pbl = NULL;
 806         __le64 *tpbl;
 807         __le64 *pblbuffer;
 808         struct nes_device *nesdev = nesvnic->nesdev;
 809         struct nes_adapter *nesadapter = nesdev->nesadapter;
 810         u32 pbl_entries;
 811         u8 rq_pbl_entries;
 812         u8 sq_pbl_entries;
 813
 814         pbl_entries = nespbl->pbl_size >> 3;
 815         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 816                         nespbl->pbl_size, pbl_entries,
 817                         (void *)nespbl->pbl_vbase,
 818                         (unsigned long) nespbl->pbl_pbase);
 819         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 820         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 821         /* the first pbl to be fro the rq_vbase... */
 822         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 823         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 824         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 825         if (!nespbl->page) {
 826                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 827                 kfree(nespbl);
 828                 return -ENOMEM;
 829         }
 830
 831         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 832         nesqp->page = nespbl->page;
 833         if (!nesqp->hwqp.sq_vbase) {
 834                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 835                 kfree(nespbl);
 836                 return -ENOMEM;
 837         }
 838
 839         /* Now to get to sq.. we need to calculate how many */
 840         /* PBL entries were used by the rq.. */
 841         pbl += sq_pbl_entries;
 842         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 843         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 844         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 845
 846         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 847                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 848                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 849         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 850         if (!nesadapter->free_256pbl) {
 851                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 852                                 nespbl->pbl_pbase);
 853                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 854                 kunmap(nesqp->page);
 855                 kfree(nespbl);
 856                 return -ENOMEM;
 857         }
 858         nesadapter->free_256pbl--;
 859         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 860
 861         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 862         pblbuffer = nesqp->pbl_vbase;
 863         if (!nesqp->pbl_vbase) {
 864                 /* memory allocated during nes_reg_user_mr() */
 865                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 866                                     nespbl->pbl_pbase);
 867                 kfree(nespbl);
 868                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 869                 nesadapter->free_256pbl++;
 870                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 871                 kunmap(nesqp->page);
 872                 return -ENOMEM;
 873         }
 874         memset(nesqp->pbl_vbase, 0, 256);
 875         /* fill in the page address in the pbl buffer.. */
 876         tpbl = pblbuffer + 16;
 877         pbl = (__le64 *)nespbl->pbl_vbase;
 878         while (sq_pbl_entries--)
 879                 *tpbl++ = *pbl++;
 880         tpbl = pblbuffer;
 881         while (rq_pbl_entries--)
 882                 *tpbl++ = *pbl++;
 883
 884         /* done with memory allocated during nes_reg_user_mr() */
 885         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 886                             nespbl->pbl_pbase);
 887         kfree(nespbl);
 888
 889         nesqp->qp_mem_size =
 890                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
 891         /* Round up to a multiple of a page */
 892         nesqp->qp_mem_size += PAGE_SIZE - 1;
 893         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 894
 895         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 896                         &nesqp->hwqp.q2_pbase);
 897
 898         if (!mem) {
 899                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
 900                 nesqp->pbl_vbase = NULL;
 901                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 902                 nesadapter->free_256pbl++;
 903                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 904                 kunmap(nesqp->page);
 905                 return -ENOMEM;
 906         }
 907         nesqp->sq_kmapped = 1;
 908         nesqp->hwqp.q2_vbase = mem;
 909         mem += 256;
 910         memset(nesqp->hwqp.q2_vbase, 0, 256);
 911         nesqp->nesqp_context = mem;
 912         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
 913         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
 914
 915         return 0;
 916 }
 917
 918
 919 /**
 920  * nes_setup_mmap_qp
 921  */
 922 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
 923                 int sq_size, int rq_size)
 924 {
 925         void *mem;
 926         struct nes_device *nesdev = nesvnic->nesdev;
 927
 928         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
 929                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
 930                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
 931                         256; /* this is Q2 */
 932         /* Round up to a multiple of a page */
 933         nesqp->qp_mem_size += PAGE_SIZE - 1;
 934         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 935
 936         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 937                         &nesqp->hwqp.sq_pbase);
 938         if (!mem)
 939                 return -ENOMEM;
 940         nes_debug(NES_DBG_QP, "PCI consistent memory for "
 941                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
 942                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
 943
 944         memset(mem, 0, nesqp->qp_mem_size);
 945
 946         nesqp->hwqp.sq_vbase = mem;
 947         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
 948
 949         nesqp->hwqp.rq_vbase = mem;
 950         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
 951                         sizeof(struct nes_hw_qp_wqe) * sq_size;
 952         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
 953
 954         nesqp->hwqp.q2_vbase = mem;
 955         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
 956                         sizeof(struct nes_hw_qp_wqe) * rq_size;
 957         mem += 256;
 958         memset(nesqp->hwqp.q2_vbase, 0, 256);
 959
 960         nesqp->nesqp_context = mem;
 961         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
 962         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
 963         return 0;
 964 }
 965
 966
 967 /**
 968  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
 969  */
 970 static void nes_free_qp_mem(struct nes_device *nesdev,
 971                 struct nes_qp *nesqp, int virt_wqs)
 972 {
 973         unsigned long flags;
 974         struct nes_adapter *nesadapter = nesdev->nesadapter;
 975         if (!virt_wqs) {
 976                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 977                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
 978         }else {
 979                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 980                 nesadapter->free_256pbl++;
 981                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 982                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
 983                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
 984                 nesqp->pbl_vbase = NULL;
 985                 if (nesqp->sq_kmapped) {
 986                         nesqp->sq_kmapped = 0;
 987                         kunmap(nesqp->page);
 988                 }
 989         }
 990 }
 991
 992
 993 /**
 994  * nes_create_qp
 995  */
 996 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
 997                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
 998 {
 999         u64 u64temp= 0;
1000         u64 u64nesqp = 0;
1001         struct nes_pd *nespd = to_nespd(ibpd);
1002         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1003         struct nes_device *nesdev = nesvnic->nesdev;
1004         struct nes_adapter *nesadapter = nesdev->nesadapter;
1005         struct nes_qp *nesqp;
1006         struct nes_cq *nescq;
1007         struct nes_ucontext *nes_ucontext;
1008         struct nes_hw_cqp_wqe *cqp_wqe;
1009         struct nes_cqp_request *cqp_request;
1010         struct nes_create_qp_req req;
1011         struct nes_create_qp_resp uresp;
1012         struct nes_pbl  *nespbl = NULL;
1013         u32 qp_num = 0;
1014         u32 opcode = 0;
1015         /* u32 counter = 0; */
1016         void *mem;
1017         unsigned long flags;
1018         int ret;
1019         int err;
1020         int virt_wqs = 0;
1021         int sq_size;
1022         int rq_size;
1023         u8 sq_encoded_size;
1024         u8 rq_encoded_size;
1025         /* int counter; */
1026
1027         if (init_attr->create_flags)
1028                 return ERR_PTR(-EINVAL);
1029
1030         atomic_inc(&qps_created);
1031         switch (init_attr->qp_type) {
1032                 case IB_QPT_RC:
1033                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1034                                 init_attr->cap.max_inline_data = 0;
1035                         } else {
1036                                 init_attr->cap.max_inline_data = 64;
1037                         }
1038                         sq_size = init_attr->cap.max_send_wr;
1039                         rq_size = init_attr->cap.max_recv_wr;
1040
1041                         /* check if the encoded sizes are OK or not... */
1042                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1043                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1044
1045                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1046                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1047                                                 rq_size, sq_size);
1048                                 return ERR_PTR(-EINVAL);
1049                         }
1050
1051                         init_attr->cap.max_send_wr = sq_size -2;
1052                         init_attr->cap.max_recv_wr = rq_size -1;
1053                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1054
1055                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1056                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1057                         if (ret) {
1058                                 return ERR_PTR(ret);
1059                         }
1060
1061                         /* Need 512 (actually now 1024) byte alignment on this structure */
1062                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1063                         if (!mem) {
1064                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1065                                 return ERR_PTR(-ENOMEM);
1066                         }
1067                         u64nesqp = (unsigned long)mem;
1068                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1069                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1070                         u64nesqp &= ~u64temp;
1071                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1072                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1073                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1074                         nesqp->allocated_buffer = mem;
1075
1076                         if (udata) {
1077                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1078                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1079                                         kfree(nesqp->allocated_buffer);
1080                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1081                                         return ERR_PTR(-EFAULT);
1082                                 }
1083                                 if (req.user_wqe_buffers) {
1084                                         virt_wqs = 1;
1085                                 }
1086                                 if (req.user_qp_buffer)
1087                                         nesqp->nesuqp_addr = req.user_qp_buffer;
1088                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1089                                         nesqp->user_mode = 1;
1090                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1091                                         if (virt_wqs) {
1092                                                 err = 1;
1093                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1094                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1095                                                                 list_del(&nespbl->list);
1096                                                                 err = 0;
1097                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1098                                                                           nespbl, nespbl->user_base);
1099                                                                 break;
1100                                                         }
1101                                                 }
1102                                                 if (err) {
1103                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1104                                                                   (long long unsigned int)req.user_wqe_buffers);
1105                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1106                                                         kfree(nesqp->allocated_buffer);
1107                                                         return ERR_PTR(-EFAULT);
1108                                                 }
1109                                         }
1110
1111                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1112                                         nesqp->mmap_sq_db_index =
1113                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1114                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1115                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1116                                                         nespd->mmap_db_index); */
1117                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1118                                                 nes_debug(NES_DBG_QP,
1119                                                           "db index > max user regions, failing create QP\n");
1120                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1121                                                 if (virt_wqs) {
1122                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1123                                                                             nespbl->pbl_pbase);
1124                                                         kfree(nespbl);
1125                                                 }
1126                                                 kfree(nesqp->allocated_buffer);
1127                                                 return ERR_PTR(-ENOMEM);
1128                                         }
1129                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1130                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1131                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1132                                 } else {
1133                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1134                                         kfree(nesqp->allocated_buffer);
1135                                         return ERR_PTR(-EFAULT);
1136                                 }
1137                         }
1138                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1139                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1140                         if (err) {
1141                                 nes_debug(NES_DBG_QP,
1142                                           "error geting qp mem code = %d\n", err);
1143                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1144                                 kfree(nesqp->allocated_buffer);
1145                                 return ERR_PTR(-ENOMEM);
1146                         }
1147
1148                         nesqp->hwqp.sq_size = sq_size;
1149                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1150                         nesqp->hwqp.sq_head = 1;
1151                         nesqp->hwqp.rq_size = rq_size;
1152                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1153                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1154                                         (void *)nesqp->nesqp_context_pbase);
1155                         */
1156                         nesqp->hwqp.qp_id = qp_num;
1157                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1158                         nesqp->nespd = nespd;
1159
1160                         nescq = to_nescq(init_attr->send_cq);
1161                         nesqp->nesscq = nescq;
1162                         nescq = to_nescq(init_attr->recv_cq);
1163                         nesqp->nesrcq = nescq;
1164
1165                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1166                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1167                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1168                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1169                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1170                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1171                         if (!udata) {
1172                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1173                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1174                         }
1175                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1176                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1177                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1178                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1179                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1180
1181
1182                         if (!virt_wqs) {
1183                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1184                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1185                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1186                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1187                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1188                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1189                         } else {
1190                                 u64temp = (u64)nesqp->pbl_pbase;
1191                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1192                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1193                         }
1194
1195                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1196                                         nesvnic->next_qp_nic_index,
1197                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1198                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1199                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1200                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1201                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1202                         nesvnic->next_qp_nic_index++;
1203                         if ((nesvnic->next_qp_nic_index > 3) ||
1204                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1205                                 nesvnic->next_qp_nic_index = 0;
1206                         }
1207                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1208
1209                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1210                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1211                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1212                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1213                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1214                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1215                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1216                                         NES_QPCONTEXT_ORDIRD_AAH |
1217                                         ((((u32)nesadapter->max_irrq_wr) <<
1218                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1219                         if (disable_mpa_crc) {
1220                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1221                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1222                         }
1223
1224
1225                         /* Create the QP */
1226                         cqp_request = nes_get_cqp_request(nesdev);
1227                         if (cqp_request == NULL) {
1228                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1229                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1230                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1231                                 kfree(nesqp->allocated_buffer);
1232                                 return ERR_PTR(-ENOMEM);
1233                         }
1234                         cqp_request->waiting = 1;
1235                         cqp_wqe = &cqp_request->cqp_wqe;
1236
1237                         if (!virt_wqs) {
1238                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1239                                         NES_CQP_QP_IWARP_STATE_IDLE;
1240                         } else {
1241                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1242                                         NES_CQP_QP_IWARP_STATE_IDLE;
1243                         }
1244                         opcode |= NES_CQP_QP_CQS_VALID;
1245                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1246                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1247                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1248
1249                         u64temp = (u64)nesqp->nesqp_context_pbase;
1250                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1251
1252                         atomic_set(&cqp_request->refcount, 2);
1253                         nes_post_cqp_request(nesdev, cqp_request);
1254
1255                         /* Wait for CQP */
1256                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1257                                         nesqp->hwqp.qp_id);
1258                         ret = wait_event_timeout(cqp_request->waitq,
1259                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1260                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1261                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1262                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1263                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1264                                         cqp_request->major_code, cqp_request->minor_code);
1265                         if ((!ret) || (cqp_request->major_code)) {
1266                                 nes_put_cqp_request(nesdev, cqp_request);
1267                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1268                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1269                                 kfree(nesqp->allocated_buffer);
1270                                 if (!ret) {
1271                                         return ERR_PTR(-ETIME);
1272                                 } else {
1273                                         return ERR_PTR(-EIO);
1274                                 }
1275                         }
1276
1277                         nes_put_cqp_request(nesdev, cqp_request);
1278
1279                         if (ibpd->uobject) {
1280                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1281                                 uresp.mmap_rq_db_index = 0;
1282                                 uresp.actual_sq_size = sq_size;
1283                                 uresp.actual_rq_size = rq_size;
1284                                 uresp.qp_id = nesqp->hwqp.qp_id;
1285                                 uresp.nes_drv_opt = nes_drv_opt;
1286                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1287                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1288                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1289                                         kfree(nesqp->allocated_buffer);
1290                                         return ERR_PTR(-EFAULT);
1291                                 }
1292                         }
1293
1294                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1295                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1296                         spin_lock_init(&nesqp->lock);
1297                         nes_add_ref(&nesqp->ibqp);
1298                         break;
1299                 default:
1300                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1301                         return ERR_PTR(-EINVAL);
1302         }
1303         init_completion(&nesqp->sq_drained);
1304         init_completion(&nesqp->rq_drained);
1305
1306         nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1307         timer_setup(&nesqp->terminate_timer, nes_terminate_timeout, 0);
1308
1309         /* update the QP table */
1310         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1311         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1312                         netdev_refcnt_read(nesvnic->netdev));
1313
1314         return &nesqp->ibqp;
1315 }
1316
1317 /**
1318  * nes_clean_cq
1319  */
1320 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1321 {
1322         u32 cq_head;
1323         u32 lo;
1324         u32 hi;
1325         u64 u64temp;
1326         unsigned long flags = 0;
1327
1328         spin_lock_irqsave(&nescq->lock, flags);
1329
1330         cq_head = nescq->hw_cq.cq_head;
1331         while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1332                 rmb();
1333                 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1334                 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1335                 u64temp = (((u64)hi) << 32) | ((u64)lo);
1336                 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1337                 if (u64temp == (u64)(unsigned long)nesqp) {
1338                         /* Zero the context value so cqe will be ignored */
1339                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1340                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1341                 }
1342
1343                 if (++cq_head >= nescq->hw_cq.cq_size)
1344                         cq_head = 0;
1345         }
1346
1347         spin_unlock_irqrestore(&nescq->lock, flags);
1348 }
1349
1350
1351 /**
1352  * nes_destroy_qp
1353  */
1354 static int nes_destroy_qp(struct ib_qp *ibqp)
1355 {
1356         struct nes_qp *nesqp = to_nesqp(ibqp);
1357         struct nes_ucontext *nes_ucontext;
1358         struct ib_qp_attr attr;
1359         struct iw_cm_id *cm_id;
1360         struct iw_cm_event cm_event;
1361         int ret = 0;
1362
1363         atomic_inc(&sw_qps_destroyed);
1364         nesqp->destroyed = 1;
1365
1366         /* Blow away the connection if it exists. */
1367         if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1368                 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1369                 attr.qp_state = IB_QPS_ERR;
1370                 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1371         }
1372
1373         if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1374                         (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1375                 cm_id = nesqp->cm_id;
1376                 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1377                 cm_event.status = -ETIMEDOUT;
1378                 cm_event.local_addr = cm_id->local_addr;
1379                 cm_event.remote_addr = cm_id->remote_addr;
1380                 cm_event.private_data = NULL;
1381                 cm_event.private_data_len = 0;
1382
1383                 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1384                                 "QP%u. cm_id = %p, refcount = %u. \n",
1385                                 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1386
1387                 cm_id->rem_ref(cm_id);
1388                 ret = cm_id->event_handler(cm_id, &cm_event);
1389                 if (ret)
1390                         nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1391         }
1392
1393         if (nesqp->user_mode) {
1394                 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1395                         nes_ucontext = to_nesucontext(ibqp->uobject->context);
1396                         clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1397                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1398                         if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1399                                 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1400                         }
1401                 }
1402                 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1403                         nesqp->sq_kmapped = 0;
1404                         kunmap(nesqp->page);
1405                 }
1406         } else {
1407                 /* Clean any pending completions from the cq(s) */
1408                 if (nesqp->nesscq)
1409                         nes_clean_cq(nesqp, nesqp->nesscq);
1410
1411                 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1412                         nes_clean_cq(nesqp, nesqp->nesrcq);
1413         }
1414         nes_rem_ref(&nesqp->ibqp);
1415         return 0;
1416 }
1417
1418
1419 /**
1420  * nes_create_cq
1421  */
1422 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1423                                    const struct ib_cq_init_attr *attr,
1424                                    struct ib_ucontext *context,
1425                                    struct ib_udata *udata)
1426 {
1427         int entries = attr->cqe;
1428         u64 u64temp;
1429         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1430         struct nes_device *nesdev = nesvnic->nesdev;
1431         struct nes_adapter *nesadapter = nesdev->nesadapter;
1432         struct nes_cq *nescq;
1433         struct nes_ucontext *nes_ucontext = NULL;
1434         struct nes_cqp_request *cqp_request;
1435         void *mem = NULL;
1436         struct nes_hw_cqp_wqe *cqp_wqe;
1437         struct nes_pbl *nespbl = NULL;
1438         struct nes_create_cq_req req;
1439         struct nes_create_cq_resp resp;
1440         u32 cq_num = 0;
1441         u32 opcode = 0;
1442         u32 pbl_entries = 1;
1443         int err;
1444         unsigned long flags;
1445         int ret;
1446
1447         if (attr->flags)
1448                 return ERR_PTR(-EINVAL);
1449
1450         if (entries > nesadapter->max_cqe)
1451                 return ERR_PTR(-EINVAL);
1452
1453         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1454                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1455         if (err) {
1456                 return ERR_PTR(err);
1457         }
1458
1459         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1460         if (!nescq) {
1461                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1462                 return ERR_PTR(-ENOMEM);
1463         }
1464
1465         nescq->hw_cq.cq_size = max(entries + 1, 5);
1466         nescq->hw_cq.cq_number = cq_num;
1467         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1468
1469
1470         if (context) {
1471                 nes_ucontext = to_nesucontext(context);
1472                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1473                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1474                         kfree(nescq);
1475                         return ERR_PTR(-EFAULT);
1476                 }
1477                 nesvnic->mcrq_ucontext = nes_ucontext;
1478                 nes_ucontext->mcrqf = req.mcrqf;
1479                 if (nes_ucontext->mcrqf) {
1480                         if (nes_ucontext->mcrqf & 0x80000000)
1481                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1482                         else if (nes_ucontext->mcrqf & 0x40000000)
1483                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1484                         else
1485                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1486                         nescq->mcrqf = nes_ucontext->mcrqf;
1487                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1488                 }
1489                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1490                                 (unsigned long)req.user_cq_buffer, entries);
1491                 err = 1;
1492                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1493                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1494                                 list_del(&nespbl->list);
1495                                 err = 0;
1496                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1497                                                 nespbl);
1498                                 break;
1499                         }
1500                 }
1501                 if (err) {
1502                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1503                         kfree(nescq);
1504                         return ERR_PTR(-EFAULT);
1505                 }
1506
1507                 pbl_entries = nespbl->pbl_size >> 3;
1508                 nescq->cq_mem_size = 0;
1509         } else {
1510                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1511                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1512                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1513
1514                 /* allocate the physical buffer space */
1515                 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1516                                             &nescq->hw_cq.cq_pbase);
1517                 if (!mem) {
1518                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1519                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1520                         kfree(nescq);
1521                         return ERR_PTR(-ENOMEM);
1522                 }
1523
1524                 nescq->hw_cq.cq_vbase = mem;
1525                 nescq->hw_cq.cq_head = 0;
1526                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1527                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1528                                 (u32)nescq->hw_cq.cq_pbase);
1529         }
1530
1531         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1532         spin_lock_init(&nescq->lock);
1533
1534         /* send CreateCQ request to CQP */
1535         cqp_request = nes_get_cqp_request(nesdev);
1536         if (cqp_request == NULL) {
1537                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1538                 if (!context)
1539                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1540                                         nescq->hw_cq.cq_pbase);
1541                 else {
1542                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1543                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1544                         kfree(nespbl);
1545                 }
1546
1547                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1548                 kfree(nescq);
1549                 return ERR_PTR(-ENOMEM);
1550         }
1551         cqp_request->waiting = 1;
1552         cqp_wqe = &cqp_request->cqp_wqe;
1553
1554         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1555                         NES_CQP_CQ_CHK_OVERFLOW |
1556                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1557
1558         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1559
1560         if (pbl_entries != 1) {
1561                 if (pbl_entries > 32) {
1562                         /* use 4k pbl */
1563                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1564                         if (nesadapter->free_4kpbl == 0) {
1565                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1566                                 nes_free_cqp_request(nesdev, cqp_request);
1567                                 if (!context)
1568                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1569                                                         nescq->hw_cq.cq_pbase);
1570                                 else {
1571                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1572                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1573                                         kfree(nespbl);
1574                                 }
1575                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1576                                 kfree(nescq);
1577                                 return ERR_PTR(-ENOMEM);
1578                         } else {
1579                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1580                                 nescq->virtual_cq = 2;
1581                                 nesadapter->free_4kpbl--;
1582                         }
1583                 } else {
1584                         /* use 256 byte pbl */
1585                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1586                         if (nesadapter->free_256pbl == 0) {
1587                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1588                                 nes_free_cqp_request(nesdev, cqp_request);
1589                                 if (!context)
1590                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1591                                                         nescq->hw_cq.cq_pbase);
1592                                 else {
1593                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1594                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1595                                         kfree(nespbl);
1596                                 }
1597                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1598                                 kfree(nescq);
1599                                 return ERR_PTR(-ENOMEM);
1600                         } else {
1601                                 opcode |= NES_CQP_CQ_VIRT;
1602                                 nescq->virtual_cq = 1;
1603                                 nesadapter->free_256pbl--;
1604                         }
1605                 }
1606         }
1607
1608         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1609
1610         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1611         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1612         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1613                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1614
1615         if (context) {
1616                 if (pbl_entries != 1)
1617                         u64temp = (u64)nespbl->pbl_pbase;
1618                 else
1619                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1620                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1621                                 nes_ucontext->mmap_db_index[0]);
1622         } else {
1623                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1624                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1625         }
1626         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1627         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1628         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1629         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1630                         cpu_to_le32((u32)(u64temp >> 1));
1631         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1632                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1633
1634         atomic_set(&cqp_request->refcount, 2);
1635         nes_post_cqp_request(nesdev, cqp_request);
1636
1637         /* Wait for CQP */
1638         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1639                         nescq->hw_cq.cq_number);
1640         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1641                         NES_EVENT_TIMEOUT * 2);
1642         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1643                         nescq->hw_cq.cq_number, ret);
1644         if ((!ret) || (cqp_request->major_code)) {
1645                 nes_put_cqp_request(nesdev, cqp_request);
1646                 if (!context)
1647                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1648                                         nescq->hw_cq.cq_pbase);
1649                 else {
1650                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1651                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1652                         kfree(nespbl);
1653                 }
1654                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1655                 kfree(nescq);
1656                 return ERR_PTR(-EIO);
1657         }
1658         nes_put_cqp_request(nesdev, cqp_request);
1659
1660         if (context) {
1661                 /* free the nespbl */
1662                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1663                                 nespbl->pbl_pbase);
1664                 kfree(nespbl);
1665                 resp.cq_id = nescq->hw_cq.cq_number;
1666                 resp.cq_size = nescq->hw_cq.cq_size;
1667                 resp.mmap_db_index = 0;
1668                 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1669                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1670                         kfree(nescq);
1671                         return ERR_PTR(-EFAULT);
1672                 }
1673         }
1674
1675         return &nescq->ibcq;
1676 }
1677
1678
1679 /**
1680  * nes_destroy_cq
1681  */
1682 static int nes_destroy_cq(struct ib_cq *ib_cq)
1683 {
1684         struct nes_cq *nescq;
1685         struct nes_device *nesdev;
1686         struct nes_vnic *nesvnic;
1687         struct nes_adapter *nesadapter;
1688         struct nes_hw_cqp_wqe *cqp_wqe;
1689         struct nes_cqp_request *cqp_request;
1690         unsigned long flags;
1691         u32 opcode = 0;
1692         int ret;
1693
1694         if (ib_cq == NULL)
1695                 return 0;
1696
1697         nescq = to_nescq(ib_cq);
1698         nesvnic = to_nesvnic(ib_cq->device);
1699         nesdev = nesvnic->nesdev;
1700         nesadapter = nesdev->nesadapter;
1701
1702         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1703
1704         /* Send DestroyCQ request to CQP */
1705         cqp_request = nes_get_cqp_request(nesdev);
1706         if (cqp_request == NULL) {
1707                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1708                 return -ENOMEM;
1709         }
1710         cqp_request->waiting = 1;
1711         cqp_wqe = &cqp_request->cqp_wqe;
1712         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1713         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1714         if (nescq->virtual_cq == 1) {
1715                 nesadapter->free_256pbl++;
1716                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1717                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1718                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1719                 }
1720         } else if (nescq->virtual_cq == 2) {
1721                 nesadapter->free_4kpbl++;
1722                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1723                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1724                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1725                 }
1726                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1727         }
1728
1729         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1730
1731         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1732         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1733         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1734                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1735         if (!nescq->mcrqf)
1736                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1737
1738         atomic_set(&cqp_request->refcount, 2);
1739         nes_post_cqp_request(nesdev, cqp_request);
1740
1741         /* Wait for CQP */
1742         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1743                         nescq->hw_cq.cq_number);
1744         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1745                         NES_EVENT_TIMEOUT);
1746         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1747                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1748                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1749                         cqp_request->minor_code);
1750         if (!ret) {
1751                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1752                                         nescq->hw_cq.cq_number);
1753                 ret = -ETIME;
1754         } else if (cqp_request->major_code) {
1755                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1756                                         nescq->hw_cq.cq_number);
1757                 ret = -EIO;
1758         } else {
1759                 ret = 0;
1760         }
1761         nes_put_cqp_request(nesdev, cqp_request);
1762
1763         if (nescq->cq_mem_size)
1764                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1765                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1766         kfree(nescq);
1767
1768         return ret;
1769 }
1770
1771 /**
1772  * root_256
1773  */
1774 static u32 root_256(struct nes_device *nesdev,
1775                     struct nes_root_vpbl *root_vpbl,
1776                     struct nes_root_vpbl *new_root,
1777                     u16 pbl_count_4k)
1778 {
1779         u64 leaf_pbl;
1780         int i, j, k;
1781
1782         if (pbl_count_4k == 1) {
1783                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1784                                                 512, &new_root->pbl_pbase);
1785
1786                 if (new_root->pbl_vbase == NULL)
1787                         return 0;
1788
1789                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1790                 for (i = 0; i < 16; i++) {
1791                         new_root->pbl_vbase[i].pa_low =
1792                                 cpu_to_le32((u32)leaf_pbl);
1793                         new_root->pbl_vbase[i].pa_high =
1794                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1795                         leaf_pbl += 256;
1796                 }
1797         } else {
1798                 for (i = 3; i >= 0; i--) {
1799                         j = i * 16;
1800                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1801                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1802                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1803                                 << 32);
1804                         for (k = 1; k < 16; k++) {
1805                                 leaf_pbl += 256;
1806                                 root_vpbl->pbl_vbase[j + k].pa_low =
1807                                                 cpu_to_le32((u32)leaf_pbl);
1808                                 root_vpbl->pbl_vbase[j + k].pa_high =
1809                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1810                         }
1811                 }
1812         }
1813
1814         return 1;
1815 }
1816
1817
1818 /**
1819  * nes_reg_mr
1820  */
1821 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1822                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1823                 dma_addr_t single_buffer, u16 pbl_count_4k,
1824                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1825                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1826 {
1827         struct nes_hw_cqp_wqe *cqp_wqe;
1828         struct nes_cqp_request *cqp_request;
1829         unsigned long flags;
1830         int ret;
1831         struct nes_adapter *nesadapter = nesdev->nesadapter;
1832         uint pg_cnt = 0;
1833         u16 pbl_count_256 = 0;
1834         u16 pbl_count = 0;
1835         u8  use_256_pbls = 0;
1836         u8  use_4k_pbls = 0;
1837         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1838         struct nes_root_vpbl new_root = { 0, NULL, NULL };
1839         u32 opcode = 0;
1840         u16 major_code;
1841
1842         /* Register the region with the adapter */
1843         cqp_request = nes_get_cqp_request(nesdev);
1844         if (cqp_request == NULL) {
1845                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1846                 return -ENOMEM;
1847         }
1848         cqp_request->waiting = 1;
1849         cqp_wqe = &cqp_request->cqp_wqe;
1850
1851         if (pbl_count_4k) {
1852                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1853
1854                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1855                 pbl_count_256 = (pg_cnt + 31) / 32;
1856                 if (pg_cnt <= 32) {
1857                         if (pbl_count_256 <= nesadapter->free_256pbl)
1858                                 use_256_pbls = 1;
1859                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1860                                 use_4k_pbls = 1;
1861                 } else if (pg_cnt <= 2048) {
1862                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1863                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1864                                 use_4k_pbls = 1;
1865                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1866                                 use_256_pbls = 1;
1867                                 use_two_level = 1;
1868                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1869                                 use_4k_pbls = 1;
1870                         }
1871                 } else {
1872                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1873                                 use_4k_pbls = 1;
1874                 }
1875
1876                 if (use_256_pbls) {
1877                         pbl_count = pbl_count_256;
1878                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1879                 } else if (use_4k_pbls) {
1880                         pbl_count =  pbl_count_4k;
1881                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1882                 } else {
1883                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1884                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1885                         nes_free_cqp_request(nesdev, cqp_request);
1886                         return -ENOMEM;
1887                 }
1888
1889                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1890         }
1891
1892         if (use_256_pbls && use_two_level) {
1893                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1894                         if (new_root.pbl_pbase != 0)
1895                                 root_vpbl = &new_root;
1896                 } else {
1897                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1898                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1899                         use_256_pbls = 0;
1900
1901                         if (pbl_count_4k == 1)
1902                                 use_two_level = 0;
1903                         pbl_count = pbl_count_4k;
1904
1905                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1906                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1907                                 use_4k_pbls = 1;
1908                         }
1909                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1910
1911                         if (use_4k_pbls == 0)
1912                                 return -ENOMEM;
1913                 }
1914         }
1915
1916         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1917                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1918         if (acc & IB_ACCESS_LOCAL_WRITE)
1919                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1920         if (acc & IB_ACCESS_REMOTE_WRITE)
1921                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1922         if (acc & IB_ACCESS_REMOTE_READ)
1923                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1924         if (acc & IB_ACCESS_MW_BIND)
1925                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1926
1927         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1928         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1929         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1930         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1931
1932         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1933                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1934         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1935                         cpu_to_le32(nespd->pd_id & 0x00007fff);
1936         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1937
1938         if (pbl_count == 0) {
1939                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1940         } else {
1941                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1942                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1943                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1944
1945                 if (use_4k_pbls)
1946                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1947         }
1948         barrier();
1949
1950         atomic_set(&cqp_request->refcount, 2);
1951         nes_post_cqp_request(nesdev, cqp_request);
1952
1953         /* Wait for CQP */
1954         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1955                         NES_EVENT_TIMEOUT);
1956         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1957                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1958                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
1959         major_code = cqp_request->major_code;
1960         nes_put_cqp_request(nesdev, cqp_request);
1961
1962         if ((!ret || major_code) && pbl_count != 0) {
1963                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1964                 if (use_256_pbls)
1965                         nesadapter->free_256pbl += pbl_count + use_two_level;
1966                 else if (use_4k_pbls)
1967                         nesadapter->free_4kpbl += pbl_count + use_two_level;
1968                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1969         }
1970         if (new_root.pbl_pbase)
1971                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1972                                     new_root.pbl_pbase);
1973
1974         if (!ret)
1975                 return -ETIME;
1976         else if (major_code)
1977                 return -EIO;
1978
1979         *actual_pbl_cnt = pbl_count + use_two_level;
1980         *used_4k_pbls = use_4k_pbls;
1981         return 0;
1982 }
1983
1984
1985 /**
1986  * nes_reg_phys_mr
1987  */
1988 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
1989                 int acc, u64 *iova_start)
1990 {
1991         u64 region_length;
1992         struct nes_pd *nespd = to_nespd(ib_pd);
1993         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
1994         struct nes_device *nesdev = nesvnic->nesdev;
1995         struct nes_adapter *nesadapter = nesdev->nesadapter;
1996         struct nes_mr *nesmr;
1997         struct ib_mr *ibmr;
1998         struct nes_vpbl vpbl;
1999         struct nes_root_vpbl root_vpbl;
2000         u32 stag;
2001         unsigned long mask;
2002         u32 stag_index = 0;
2003         u32 next_stag_index = 0;
2004         u32 driver_key = 0;
2005         int err = 0;
2006         int ret = 0;
2007         u16 pbl_count = 0;
2008         u8 single_page = 1;
2009         u8 stag_key = 0;
2010
2011         region_length = 0;
2012         vpbl.pbl_vbase = NULL;
2013         root_vpbl.pbl_vbase = NULL;
2014         root_vpbl.pbl_pbase = 0;
2015
2016         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2017         stag_key = (u8)next_stag_index;
2018
2019         driver_key = 0;
2020
2021         next_stag_index >>= 8;
2022         next_stag_index %= nesadapter->max_mr;
2023
2024         if ((addr ^ *iova_start) & ~PAGE_MASK)
2025                 return ERR_PTR(-EINVAL);
2026
2027         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2028                         &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2029         if (err) {
2030                 return ERR_PTR(err);
2031         }
2032
2033         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2034         if (!nesmr) {
2035                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2036                 return ERR_PTR(-ENOMEM);
2037         }
2038
2039         /* Allocate a 4K buffer for the PBL */
2040         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2041                         &vpbl.pbl_pbase);
2042         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2043                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2044         if (!vpbl.pbl_vbase) {
2045                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2046                 ibmr = ERR_PTR(-ENOMEM);
2047                 kfree(nesmr);
2048                 goto reg_phys_err;
2049         }
2050
2051
2052         mask = !size;
2053
2054         if (mask & ~PAGE_MASK) {
2055                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2056                 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2057                 ibmr = ERR_PTR(-EINVAL);
2058                 kfree(nesmr);
2059                 goto reg_phys_err;
2060         }
2061
2062         region_length += size;
2063         vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2064         vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2065
2066         stag = stag_index << 8;
2067         stag |= driver_key;
2068         stag += (u32)stag_key;
2069
2070         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2071                         " length = 0x%016lX, index = 0x%08X\n",
2072                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2073
2074         /* Make the leaf PBL the root if only one PBL */
2075         root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2076
2077         if (single_page) {
2078                 pbl_count = 0;
2079         } else {
2080                 pbl_count = 1;
2081         }
2082         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2083                         addr, pbl_count, 1, acc, iova_start,
2084                         &nesmr->pbls_used, &nesmr->pbl_4k);
2085
2086         if (ret == 0) {
2087                 nesmr->ibmr.rkey = stag;
2088                 nesmr->ibmr.lkey = stag;
2089                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2090                 ibmr = &nesmr->ibmr;
2091         } else {
2092                 kfree(nesmr);
2093                 ibmr = ERR_PTR(-ENOMEM);
2094         }
2095
2096 reg_phys_err:
2097         /* single PBL case */
2098         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2099         return ibmr;
2100 }
2101
2102
2103 /**
2104  * nes_get_dma_mr
2105  */
2106 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2107 {
2108         u64 kva = 0;
2109
2110         nes_debug(NES_DBG_MR, "\n");
2111
2112         return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2113 }
2114
2115 /**
2116  * nes_reg_user_mr
2117  */
2118 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2119                 u64 virt, int acc, struct ib_udata *udata)
2120 {
2121         u64 iova_start;
2122         __le64 *pbl;
2123         u64 region_length;
2124         dma_addr_t last_dma_addr = 0;
2125         dma_addr_t first_dma_addr = 0;
2126         struct nes_pd *nespd = to_nespd(pd);
2127         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2128         struct nes_device *nesdev = nesvnic->nesdev;
2129         struct nes_adapter *nesadapter = nesdev->nesadapter;
2130         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2131         struct scatterlist *sg;
2132         struct nes_ucontext *nes_ucontext;
2133         struct nes_pbl *nespbl;
2134         struct nes_mr *nesmr;
2135         struct ib_umem *region;
2136         struct nes_mem_reg_req req;
2137         struct nes_vpbl vpbl;
2138         struct nes_root_vpbl root_vpbl;
2139         int entry, page_index;
2140         int page_count = 0;
2141         int err, pbl_depth = 0;
2142         int chunk_pages;
2143         int ret;
2144         u32 stag;
2145         u32 stag_index = 0;
2146         u32 next_stag_index;
2147         u32 driver_key;
2148         u32 root_pbl_index = 0;
2149         u32 cur_pbl_index = 0;
2150         u32 skip_pages;
2151         u16 pbl_count;
2152         u8 single_page = 1;
2153         u8 stag_key;
2154         int first_page = 1;
2155
2156         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2157         if (IS_ERR(region)) {
2158                 return (struct ib_mr *)region;
2159         }
2160
2161         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2162                         " offset = %u, page size = %lu.\n",
2163                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2164                         ib_umem_offset(region), BIT(region->page_shift));
2165
2166         skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2167
2168         if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2169                 ib_umem_release(region);
2170                 return ERR_PTR(-EFAULT);
2171         }
2172         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2173
2174         switch (req.reg_type) {
2175                 case IWNES_MEMREG_TYPE_MEM:
2176                         pbl_depth = 0;
2177                         region_length = 0;
2178                         vpbl.pbl_vbase = NULL;
2179                         root_vpbl.pbl_vbase = NULL;
2180                         root_vpbl.pbl_pbase = 0;
2181
2182                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2183                         stag_key = (u8)next_stag_index;
2184
2185                         driver_key = next_stag_index & 0x70000000;
2186
2187                         next_stag_index >>= 8;
2188                         next_stag_index %= nesadapter->max_mr;
2189
2190                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2191                                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2192                         if (err) {
2193                                 ib_umem_release(region);
2194                                 return ERR_PTR(err);
2195                         }
2196
2197                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2198                         if (!nesmr) {
2199                                 ib_umem_release(region);
2200                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2201                                 return ERR_PTR(-ENOMEM);
2202                         }
2203                         nesmr->region = region;
2204
2205                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2206                                 if (sg_dma_address(sg) & ~PAGE_MASK) {
2207                                         ib_umem_release(region);
2208                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2209                                         nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2210                                                   (unsigned int) sg_dma_address(sg));
2211                                         ibmr = ERR_PTR(-EINVAL);
2212                                         kfree(nesmr);
2213                                         goto reg_user_mr_err;
2214                                 }
2215
2216                                 if (!sg_dma_len(sg)) {
2217                                         ib_umem_release(region);
2218                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2219                                                           stag_index);
2220                                         nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2221                                         ibmr = ERR_PTR(-EINVAL);
2222                                         kfree(nesmr);
2223                                         goto reg_user_mr_err;
2224                                 }
2225
2226                                 region_length += sg_dma_len(sg);
2227                                 chunk_pages = sg_dma_len(sg) >> 12;
2228                                 region_length -= skip_pages << 12;
2229                                 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2230                                         skip_pages = 0;
2231                                         if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2232                                                 goto enough_pages;
2233                                         if ((page_count&0x01FF) == 0) {
2234                                                 if (page_count >= 1024 * 512) {
2235                                                         ib_umem_release(region);
2236                                                         nes_free_resource(nesadapter,
2237                                                                           nesadapter->allocated_mrs, stag_index);
2238                                                         kfree(nesmr);
2239                                                         ibmr = ERR_PTR(-E2BIG);
2240                                                         goto reg_user_mr_err;
2241                                                 }
2242                                                 if (root_pbl_index == 1) {
2243                                                         root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2244                                                                         8192, &root_vpbl.pbl_pbase);
2245                                                         nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2246                                                                   root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2247                                                         if (!root_vpbl.pbl_vbase) {
2248                                                                 ib_umem_release(region);
2249                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2250                                                                                     vpbl.pbl_pbase);
2251                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2252                                                                                   stag_index);
2253                                                                 kfree(nesmr);
2254                                                                 ibmr = ERR_PTR(-ENOMEM);
2255                                                                 goto reg_user_mr_err;
2256                                                         }
2257                                                         root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2258                                                                         GFP_KERNEL);
2259                                                         if (!root_vpbl.leaf_vpbl) {
2260                                                                 ib_umem_release(region);
2261                                                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2262                                                                                     root_vpbl.pbl_pbase);
2263                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2264                                                                                     vpbl.pbl_pbase);
2265                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2266                                                                                   stag_index);
2267                                                                 kfree(nesmr);
2268                                                                 ibmr = ERR_PTR(-ENOMEM);
2269                                                                 goto reg_user_mr_err;
2270                                                         }
2271                                                         root_vpbl.pbl_vbase[0].pa_low =
2272                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2273                                                         root_vpbl.pbl_vbase[0].pa_high =
2274                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2275                                                         root_vpbl.leaf_vpbl[0] = vpbl;
2276                                                 }
2277                                                 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2278                                                                 &vpbl.pbl_pbase);
2279                                                 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2280                                                           vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2281                                                 if (!vpbl.pbl_vbase) {
2282                                                         ib_umem_release(region);
2283                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2284                                                         ibmr = ERR_PTR(-ENOMEM);
2285                                                         kfree(nesmr);
2286                                                         goto reg_user_mr_err;
2287                                                 }
2288                                                 if (1 <= root_pbl_index) {
2289                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2290                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2291                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2292                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2293                                                         root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2294                                                 }
2295                                                 root_pbl_index++;
2296                                                 cur_pbl_index = 0;
2297                                         }
2298                                         if (single_page) {
2299                                                 if (page_count != 0) {
2300                                                         if ((last_dma_addr+4096) !=
2301                                                                         (sg_dma_address(sg)+
2302                                                                         (page_index*4096)))
2303                                                                 single_page = 0;
2304                                                         last_dma_addr = sg_dma_address(sg)+
2305                                                                         (page_index*4096);
2306                                                 } else {
2307                                                         first_dma_addr = sg_dma_address(sg)+
2308                                                                         (page_index*4096);
2309                                                         last_dma_addr = first_dma_addr;
2310                                                 }
2311                                         }
2312
2313                                         vpbl.pbl_vbase[cur_pbl_index].pa_low =
2314                                                         cpu_to_le32((u32)(sg_dma_address(sg)+
2315                                                         (page_index*4096)));
2316                                         vpbl.pbl_vbase[cur_pbl_index].pa_high =
2317                                                         cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2318                                                         (page_index*4096))) >> 32)));
2319                                         cur_pbl_index++;
2320                                         page_count++;
2321                                 }
2322                         }
2323
2324                         enough_pages:
2325                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2326                                         " stag_key=0x%08x\n",
2327                                         stag_index, driver_key, stag_key);
2328                         stag = stag_index << 8;
2329                         stag |= driver_key;
2330                         stag += (u32)stag_key;
2331
2332                         iova_start = virt;
2333                         /* Make the leaf PBL the root if only one PBL */
2334                         if (root_pbl_index == 1) {
2335                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2336                         }
2337
2338                         if (single_page) {
2339                                 pbl_count = 0;
2340                         } else {
2341                                 pbl_count = root_pbl_index;
2342                                 first_dma_addr = 0;
2343                         }
2344                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2345                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2346                                         stag, (unsigned int)iova_start,
2347                                         (unsigned int)region_length, stag_index,
2348                                         (unsigned long long)region->length, pbl_count);
2349                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2350                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2351                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2352
2353                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2354
2355                         if (ret == 0) {
2356                                 nesmr->ibmr.rkey = stag;
2357                                 nesmr->ibmr.lkey = stag;
2358                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2359                                 ibmr = &nesmr->ibmr;
2360                         } else {
2361                                 ib_umem_release(region);
2362                                 kfree(nesmr);
2363                                 ibmr = ERR_PTR(-ENOMEM);
2364                         }
2365
2366                         reg_user_mr_err:
2367                         /* free the resources */
2368                         if (root_pbl_index == 1) {
2369                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2370                                                 vpbl.pbl_pbase);
2371                         } else {
2372                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2373                                         pci_free_consistent(nesdev->pcidev, 4096,
2374                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2375                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2376                                 }
2377                                 kfree(root_vpbl.leaf_vpbl);
2378                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2379                                                 root_vpbl.pbl_pbase);
2380                         }
2381
2382                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2383
2384                         return ibmr;
2385                 case IWNES_MEMREG_TYPE_QP:
2386                 case IWNES_MEMREG_TYPE_CQ:
2387                         if (!region->length) {
2388                                 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2389                                 ib_umem_release(region);
2390                                 return ERR_PTR(-EINVAL);
2391                         }
2392                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2393                         if (!nespbl) {
2394                                 ib_umem_release(region);
2395                                 return ERR_PTR(-ENOMEM);
2396                         }
2397                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2398                         if (!nesmr) {
2399                                 ib_umem_release(region);
2400                                 kfree(nespbl);
2401                                 return ERR_PTR(-ENOMEM);
2402                         }
2403                         nesmr->region = region;
2404                         nes_ucontext = to_nesucontext(pd->uobject->context);
2405                         pbl_depth = region->length >> 12;
2406                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2407                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2408                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2409                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2410                         } else {
2411                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2412                         }
2413
2414                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2415                                         nespbl->pbl_size, pbl_depth);
2416                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2417                                         &nespbl->pbl_pbase);
2418                         if (!pbl) {
2419                                 ib_umem_release(region);
2420                                 kfree(nesmr);
2421                                 kfree(nespbl);
2422                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2423                                 return ERR_PTR(-ENOMEM);
2424                         }
2425
2426                         nespbl->pbl_vbase = (u64 *)pbl;
2427                         nespbl->user_base = start;
2428                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2429                                         " pbl_vbase=%p user_base=0x%lx\n",
2430                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2431                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2432
2433                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2434                                 chunk_pages = sg_dma_len(sg) >> 12;
2435                                 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2436                                 if (first_page) {
2437                                         nespbl->page = sg_page(sg);
2438                                         first_page = 0;
2439                                 }
2440
2441                                 for (page_index = 0; page_index < chunk_pages; page_index++) {
2442                                         ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2443                                                         (sg_dma_address(sg)+
2444                                                         (page_index*4096)));
2445                                         ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2446                                                         (sg_dma_address(sg)+
2447                                                         (page_index*4096)))>>32);
2448                                         nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2449                                                   (unsigned long long)*pbl,
2450                                                   le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2451                                         pbl++;
2452                                 }
2453                         }
2454
2455                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2456                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2457                         } else {
2458                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2459                         }
2460                         nesmr->ibmr.rkey = -1;
2461                         nesmr->ibmr.lkey = -1;
2462                         nesmr->mode = req.reg_type;
2463                         return &nesmr->ibmr;
2464         }
2465
2466         ib_umem_release(region);
2467         return ERR_PTR(-ENOSYS);
2468 }
2469
2470
2471 /**
2472  * nes_dereg_mr
2473  */
2474 static int nes_dereg_mr(struct ib_mr *ib_mr)
2475 {
2476         struct nes_mr *nesmr = to_nesmr(ib_mr);
2477         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2478         struct nes_device *nesdev = nesvnic->nesdev;
2479         struct nes_adapter *nesadapter = nesdev->nesadapter;
2480         struct nes_hw_cqp_wqe *cqp_wqe;
2481         struct nes_cqp_request *cqp_request;
2482         unsigned long flags;
2483         int ret;
2484         u16 major_code;
2485         u16 minor_code;
2486
2487
2488         if (nesmr->pages)
2489                 pci_free_consistent(nesdev->pcidev,
2490                                     nesmr->max_pages * sizeof(u64),
2491                                     nesmr->pages,
2492                                     nesmr->paddr);
2493
2494         if (nesmr->region) {
2495                 ib_umem_release(nesmr->region);
2496         }
2497         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2498                 kfree(nesmr);
2499                 return 0;
2500         }
2501
2502         /* Deallocate the region with the adapter */
2503
2504         cqp_request = nes_get_cqp_request(nesdev);
2505         if (cqp_request == NULL) {
2506                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2507                 return -ENOMEM;
2508         }
2509         cqp_request->waiting = 1;
2510         cqp_wqe = &cqp_request->cqp_wqe;
2511
2512         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2513         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2514                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2515                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2516         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2517
2518         atomic_set(&cqp_request->refcount, 2);
2519         nes_post_cqp_request(nesdev, cqp_request);
2520
2521         /* Wait for CQP */
2522         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2523         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2524                         NES_EVENT_TIMEOUT);
2525         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2526                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2527                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2528
2529         major_code = cqp_request->major_code;
2530         minor_code = cqp_request->minor_code;
2531
2532         nes_put_cqp_request(nesdev, cqp_request);
2533
2534         if (!ret) {
2535                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2536                                 " ib_mr=%p, rkey = 0x%08X\n",
2537                                 ib_mr, ib_mr->rkey);
2538                 return -ETIME;
2539         } else if (major_code) {
2540                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2541                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2542                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2543                 return -EIO;
2544         }
2545
2546         if (nesmr->pbls_used != 0) {
2547                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2548                 if (nesmr->pbl_4k) {
2549                         nesadapter->free_4kpbl += nesmr->pbls_used;
2550                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2551                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2552                                         "exceeded the max(%u)\n",
2553                                         nesadapter->free_4kpbl,
2554                                         nesadapter->max_4kpbl);
2555                 } else {
2556                         nesadapter->free_256pbl += nesmr->pbls_used;
2557                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2558                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2559                                         "exceeded the max(%u)\n",
2560                                         nesadapter->free_256pbl,
2561                                         nesadapter->max_256pbl);
2562                 }
2563                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2564         }
2565         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2566                         (ib_mr->rkey & 0x0fffff00) >> 8);
2567
2568         kfree(nesmr);
2569
2570         return 0;
2571 }
2572
2573
2574 /**
2575  * show_rev
2576  */
2577 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2578                         char *buf)
2579 {
2580         struct nes_ib_device *nesibdev =
2581                         container_of(dev, struct nes_ib_device, ibdev.dev);
2582         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2583
2584         nes_debug(NES_DBG_INIT, "\n");
2585         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2586 }
2587
2588
2589 /**
2590  * show_hca
2591  */
2592 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2593                         char *buf)
2594 {
2595         nes_debug(NES_DBG_INIT, "\n");
2596         return sprintf(buf, "NES020\n");
2597 }
2598
2599
2600 /**
2601  * show_board
2602  */
2603 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2604                           char *buf)
2605 {
2606         nes_debug(NES_DBG_INIT, "\n");
2607         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2608 }
2609
2610
2611 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2612 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2613 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2614
2615 static struct device_attribute *nes_dev_attributes[] = {
2616         &dev_attr_hw_rev,
2617         &dev_attr_hca_type,
2618         &dev_attr_board_id
2619 };
2620
2621
2622 /**
2623  * nes_query_qp
2624  */
2625 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2626                 int attr_mask, struct ib_qp_init_attr *init_attr)
2627 {
2628         struct nes_qp *nesqp = to_nesqp(ibqp);
2629
2630         nes_debug(NES_DBG_QP, "\n");
2631
2632         attr->qp_access_flags = 0;
2633         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2634         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2635         attr->cap.max_recv_sge = 1;
2636         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2637                 attr->cap.max_inline_data = 0;
2638         else
2639                 attr->cap.max_inline_data = 64;
2640
2641         init_attr->event_handler = nesqp->ibqp.event_handler;
2642         init_attr->qp_context = nesqp->ibqp.qp_context;
2643         init_attr->send_cq = nesqp->ibqp.send_cq;
2644         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2645         init_attr->srq = nesqp->ibqp.srq;
2646         init_attr->cap = attr->cap;
2647
2648         return 0;
2649 }
2650
2651
2652 /**
2653  * nes_hw_modify_qp
2654  */
2655 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2656                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2657 {
2658         struct nes_hw_cqp_wqe *cqp_wqe;
2659         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2660         /* struct iw_cm_event cm_event; */
2661         struct nes_cqp_request *cqp_request;
2662         int ret;
2663         u16 major_code;
2664
2665         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2666                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2667
2668         cqp_request = nes_get_cqp_request(nesdev);
2669         if (cqp_request == NULL) {
2670                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2671                 return -ENOMEM;
2672         }
2673         if (wait_completion) {
2674                 cqp_request->waiting = 1;
2675         } else {
2676                 cqp_request->waiting = 0;
2677         }
2678         cqp_wqe = &cqp_request->cqp_wqe;
2679
2680         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2681                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2682         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2683                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2684         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2685         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2686         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2687
2688         /* If sending a terminate message, fill in the length (in words) */
2689         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2690             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2691                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2692                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2693         }
2694
2695         atomic_set(&cqp_request->refcount, 2);
2696         nes_post_cqp_request(nesdev, cqp_request);
2697
2698         /* Wait for CQP */
2699         if (wait_completion) {
2700                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2701                                 nesqp->hwqp.qp_id); */
2702                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2703                                 NES_EVENT_TIMEOUT);
2704                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2705                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2706                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2707                 major_code = cqp_request->major_code;
2708                 if (major_code) {
2709                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2710                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2711                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2712                                         cqp_request->minor_code, next_iwarp_state);
2713                 }
2714
2715                 nes_put_cqp_request(nesdev, cqp_request);
2716
2717                 if (!ret)
2718                         return -ETIME;
2719                 else if (major_code)
2720                         return -EIO;
2721                 else
2722                         return 0;
2723         } else {
2724                 return 0;
2725         }
2726 }
2727
2728
2729 /**
2730  * nes_modify_qp
2731  */
2732 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2733                 int attr_mask, struct ib_udata *udata)
2734 {
2735         struct nes_qp *nesqp = to_nesqp(ibqp);
2736         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2737         struct nes_device *nesdev = nesvnic->nesdev;
2738         /* u32 cqp_head; */
2739         /* u32 counter; */
2740         u32 next_iwarp_state = 0;
2741         int err;
2742         unsigned long qplockflags;
2743         int ret;
2744         u16 original_last_aeq;
2745         u8 issue_modify_qp = 0;
2746         u8 dont_wait = 0;
2747
2748         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2749                         " iwarp_state=0x%X, refcount=%d\n",
2750                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2751                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2752
2753         spin_lock_irqsave(&nesqp->lock, qplockflags);
2754
2755         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2756                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2757                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2758                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2759
2760         if (attr_mask & IB_QP_STATE) {
2761                 switch (attr->qp_state) {
2762                         case IB_QPS_INIT:
2763                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2764                                                 nesqp->hwqp.qp_id);
2765                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2766                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2767                                         return -EINVAL;
2768                                 }
2769                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2770                                 issue_modify_qp = 1;
2771                                 break;
2772                         case IB_QPS_RTR:
2773                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2774                                                 nesqp->hwqp.qp_id);
2775                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2776                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2777                                         return -EINVAL;
2778                                 }
2779                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2780                                 issue_modify_qp = 1;
2781                                 break;
2782                         case IB_QPS_RTS:
2783                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2784                                                 nesqp->hwqp.qp_id);
2785                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2786                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2787                                         return -EINVAL;
2788                                 }
2789                                 if (nesqp->cm_id == NULL) {
2790                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2791                                                         nesqp->hwqp.qp_id );
2792                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2793                                         return -EINVAL;
2794                                 }
2795                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2796                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2797                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2798                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2799                                 issue_modify_qp = 1;
2800                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2801                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2802                                 nesqp->hte_added = 1;
2803                                 break;
2804                         case IB_QPS_SQD:
2805                                 issue_modify_qp = 1;
2806                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2807                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2808                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2809                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2810                                         return 0;
2811                                 } else {
2812                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2813                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2814                                                                 " ignored due to current iWARP state\n",
2815                                                                 nesqp->hwqp.qp_id);
2816                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2817                                                 return -EINVAL;
2818                                         }
2819                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2820                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2821                                                                 " already done based on hw state.\n",
2822                                                                 nesqp->hwqp.qp_id);
2823                                                 issue_modify_qp = 0;
2824                                         }
2825                                         switch (nesqp->hw_iwarp_state) {
2826                                                 case NES_AEQE_IWARP_STATE_CLOSING:
2827                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2828                                                         break;
2829                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
2830                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2831                                                         break;
2832                                                 case NES_AEQE_IWARP_STATE_ERROR:
2833                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2834                                                         break;
2835                                                 default:
2836                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2837                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2838                                                         break;
2839                                         }
2840                                 }
2841                                 break;
2842                         case IB_QPS_SQE:
2843                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2844                                                 nesqp->hwqp.qp_id);
2845                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2846                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2847                                         return -EINVAL;
2848                                 }
2849                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2850                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2851                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2852                                 issue_modify_qp = 1;
2853                                 break;
2854                         case IB_QPS_ERR:
2855                         case IB_QPS_RESET:
2856                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2857                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2858                                         return -EINVAL;
2859                                 }
2860                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2861                                                 nesqp->hwqp.qp_id);
2862                                 if (nesqp->term_flags)
2863                                         del_timer(&nesqp->terminate_timer);
2864
2865                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2866                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2867                                 if (nesqp->hte_added) {
2868                                         nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2869                                         next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2870                                         nesqp->hte_added = 0;
2871                                 }
2872                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2873                                                 (nesdev->iw_status) &&
2874                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2875                                         next_iwarp_state |= NES_CQP_QP_RESET;
2876                                 } else {
2877                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2878                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2879                                         dont_wait = 1;
2880                                 }
2881                                 issue_modify_qp = 1;
2882                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2883                                 break;
2884                         default:
2885                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2886                                 return -EINVAL;
2887                                 break;
2888                 }
2889
2890                 nesqp->ibqp_state = attr->qp_state;
2891                 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2892                 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2893                                 nesqp->iwarp_state);
2894         }
2895
2896         if (attr_mask & IB_QP_ACCESS_FLAGS) {
2897                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2898                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2899                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
2900                         issue_modify_qp = 1;
2901                 }
2902                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2903                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2904                         issue_modify_qp = 1;
2905                 }
2906                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2907                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2908                         issue_modify_qp = 1;
2909                 }
2910                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2911                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2912                         issue_modify_qp = 1;
2913                 }
2914
2915                 if (nesqp->user_mode) {
2916                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2917                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
2918                         issue_modify_qp = 1;
2919                 }
2920         }
2921
2922         original_last_aeq = nesqp->last_aeq;
2923         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2924
2925         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2926
2927         ret = 0;
2928
2929
2930         if (issue_modify_qp) {
2931                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2932                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2933                 if (ret)
2934                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2935                                         " failed for QP%u.\n",
2936                                         next_iwarp_state, nesqp->hwqp.qp_id);
2937
2938         }
2939
2940         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2941                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2942                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2943                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2944                                 original_last_aeq, nesqp->last_aeq);
2945                 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2946                         if (dont_wait) {
2947                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2948                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2949                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2950                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2951                                                         original_last_aeq, nesqp->last_aeq);
2952                                         /* this one is for the cm_disconnect thread */
2953                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
2954                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2955                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2956                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2957                                         nes_cm_disconn(nesqp);
2958                                 } else {
2959                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2960                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2961                                 }
2962                         } else {
2963                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
2964                                 if (nesqp->cm_id) {
2965                                         /* These two are for the timer thread */
2966                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
2967                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
2968                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2969                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
2970                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
2971                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2972                                                                 original_last_aeq, nesqp->last_aeq);
2973                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
2974                                         }
2975                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2976                                 } else {
2977                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2978                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2979                                                         " need ae to finish up, original_last_aeq = 0x%04X."
2980                                                         " last_aeq = 0x%04X.\n",
2981                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2982                                                         original_last_aeq, nesqp->last_aeq);
2983                                 }
2984                         }
2985                 } else {
2986                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2987                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2988                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2989                                         original_last_aeq, nesqp->last_aeq);
2990                 }
2991         } else {
2992                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2993                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2994                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2995                                 original_last_aeq, nesqp->last_aeq);
2996         }
2997
2998         err = 0;
2999
3000         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3001                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3002
3003         return err;
3004 }
3005
3006
3007 /**
3008  * nes_muticast_attach
3009  */
3010 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3011 {
3012         nes_debug(NES_DBG_INIT, "\n");
3013         return -ENOSYS;
3014 }
3015
3016
3017 /**
3018  * nes_multicast_detach
3019  */
3020 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3021 {
3022         nes_debug(NES_DBG_INIT, "\n");
3023         return -ENOSYS;
3024 }
3025
3026
3027 /**
3028  * nes_process_mad
3029  */
3030 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3031                 u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
3032                 const struct ib_mad_hdr *in, size_t in_mad_size,
3033                 struct ib_mad_hdr *out, size_t *out_mad_size,
3034                 u16 *out_mad_pkey_index)
3035 {
3036         nes_debug(NES_DBG_INIT, "\n");
3037         return -ENOSYS;
3038 }
3039
3040 static inline void
3041 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3042 {
3043         int sge_index;
3044         int total_payload_length = 0;
3045         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3046                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3047                         ib_wr->sg_list[sge_index].addr);
3048                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3049                         ib_wr->sg_list[sge_index].length);
3050                 if (uselkey)
3051                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3052                                                 (ib_wr->sg_list[sge_index].lkey));
3053                 else
3054                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3055
3056                 total_payload_length += ib_wr->sg_list[sge_index].length;
3057         }
3058         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3059                         total_payload_length);
3060         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3061                                 total_payload_length);
3062 }
3063
3064 /**
3065  * nes_post_send
3066  */
3067 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3068                 struct ib_send_wr **bad_wr)
3069 {
3070         u64 u64temp;
3071         unsigned long flags = 0;
3072         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3073         struct nes_device *nesdev = nesvnic->nesdev;
3074         struct nes_qp *nesqp = to_nesqp(ibqp);
3075         struct nes_hw_qp_wqe *wqe;
3076         int err = 0;
3077         u32 qsize = nesqp->hwqp.sq_size;
3078         u32 head;
3079         u32 wqe_misc = 0;
3080         u32 wqe_count = 0;
3081         u32 counter;
3082
3083         if (nesqp->ibqp_state > IB_QPS_RTS) {
3084                 err = -EINVAL;
3085                 goto out;
3086         }
3087
3088         spin_lock_irqsave(&nesqp->lock, flags);
3089
3090         head = nesqp->hwqp.sq_head;
3091
3092         while (ib_wr) {
3093                 /* Check for QP error */
3094                 if (nesqp->term_flags) {
3095                         err = -EINVAL;
3096                         break;
3097                 }
3098
3099                 /* Check for SQ overflow */
3100                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3101                         err = -ENOMEM;
3102                         break;
3103                 }
3104
3105                 wqe = &nesqp->hwqp.sq_vbase[head];
3106                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3107                                 nesqp->hwqp.qp_id, wqe, head); */
3108                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3109                 u64temp = (u64)(ib_wr->wr_id);
3110                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3111                                         u64temp);
3112                 switch (ib_wr->opcode) {
3113                 case IB_WR_SEND:
3114                 case IB_WR_SEND_WITH_INV:
3115                         if (IB_WR_SEND == ib_wr->opcode) {
3116                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3117                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3118                                 else
3119                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3120                         } else {
3121                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3122                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3123                                 else
3124                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3125
3126                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3127                                                     ib_wr->ex.invalidate_rkey);
3128                         }
3129
3130                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3131                                 err = -EINVAL;
3132                                 break;
3133                         }
3134
3135                         if (ib_wr->send_flags & IB_SEND_FENCE)
3136                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3137
3138                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3139                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3140                              (ib_wr->sg_list[0].length <= 64)) {
3141                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3142                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3143                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3144                                                     ib_wr->sg_list[0].length);
3145                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3146                         } else {
3147                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3148                         }
3149
3150                         break;
3151                 case IB_WR_RDMA_WRITE:
3152                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3153                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3154                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3155                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3156                                 err = -EINVAL;
3157                                 break;
3158                         }
3159
3160                         if (ib_wr->send_flags & IB_SEND_FENCE)
3161                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3162
3163                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3164                                             rdma_wr(ib_wr)->rkey);
3165                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3166                                             rdma_wr(ib_wr)->remote_addr);
3167
3168                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3169                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3170                              (ib_wr->sg_list[0].length <= 64)) {
3171                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3172                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3173                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3174                                                     ib_wr->sg_list[0].length);
3175                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3176                         } else {
3177                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3178                         }
3179
3180                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3181                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3182                         break;
3183                 case IB_WR_RDMA_READ:
3184                 case IB_WR_RDMA_READ_WITH_INV:
3185                         /* iWARP only supports 1 sge for RDMA reads */
3186                         if (ib_wr->num_sge > 1) {
3187                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3188                                           ib_wr->num_sge);
3189                                 err = -EINVAL;
3190                                 break;
3191                         }
3192                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3193                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3194                         } else {
3195                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3196                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3197                                                     ib_wr->ex.invalidate_rkey);
3198                         }
3199
3200                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3201                                             rdma_wr(ib_wr)->remote_addr);
3202                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3203                                             rdma_wr(ib_wr)->rkey);
3204                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3205                                             ib_wr->sg_list->length);
3206                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3207                                             ib_wr->sg_list->addr);
3208                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3209                                             ib_wr->sg_list->lkey);
3210                         break;
3211                 case IB_WR_LOCAL_INV:
3212                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3213                         set_wqe_32bit_value(wqe->wqe_words,
3214                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3215                                             ib_wr->ex.invalidate_rkey);
3216                         break;
3217                 case IB_WR_REG_MR:
3218                 {
3219                         struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3220                         int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3221                         int flags = reg_wr(ib_wr)->access;
3222
3223                         if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3224                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3225                                 err = -EINVAL;
3226                                 break;
3227                         }
3228                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3229                         set_wqe_64bit_value(wqe->wqe_words,
3230                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3231                                             mr->ibmr.iova);
3232                         set_wqe_32bit_value(wqe->wqe_words,
3233                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3234                                             lower_32_bits(mr->ibmr.length));
3235                         set_wqe_32bit_value(wqe->wqe_words,
3236                                             NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3237                         set_wqe_32bit_value(wqe->wqe_words,
3238                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3239                                             reg_wr(ib_wr)->key);
3240
3241                         if (page_shift == 12) {
3242                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3243                         } else if (page_shift == 21) {
3244                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3245                         } else {
3246                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3247                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3248                                 err = -EINVAL;
3249                                 break;
3250                         }
3251
3252                         /* Set access_flags */
3253                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3254                         if (flags & IB_ACCESS_LOCAL_WRITE)
3255                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3256
3257                         if (flags & IB_ACCESS_REMOTE_WRITE)
3258                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3259
3260                         if (flags & IB_ACCESS_REMOTE_READ)
3261                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3262
3263                         if (flags & IB_ACCESS_MW_BIND)
3264                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3265
3266                         /* Fill in PBL info: */
3267                         set_wqe_64bit_value(wqe->wqe_words,
3268                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3269                                             mr->paddr);
3270
3271                         set_wqe_32bit_value(wqe->wqe_words,
3272                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3273                                             mr->npages * 8);
3274
3275                         nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3276                                   "length: %lld, rkey: %0x, pgl_paddr: %llx, "
3277                                   "page_list_len: %u, wqe_misc: %x\n",
3278                                   (unsigned long long) mr->ibmr.iova,
3279                                   mr->ibmr.length,
3280                                   reg_wr(ib_wr)->key,
3281                                   (unsigned long long) mr->paddr,
3282                                   mr->npages,
3283                                   wqe_misc);
3284                         break;
3285                 }
3286                 default:
3287                         /* error */
3288                         err = -EINVAL;
3289                         break;
3290                 }
3291
3292                 if (err)
3293                         break;
3294
3295                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3296                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3297
3298                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3299
3300                 ib_wr = ib_wr->next;
3301                 head++;
3302                 wqe_count++;
3303                 if (head >= qsize)
3304                         head = 0;
3305
3306         }
3307
3308         nesqp->hwqp.sq_head = head;
3309         barrier();
3310         while (wqe_count) {
3311                 counter = min(wqe_count, ((u32)255));
3312                 wqe_count -= counter;
3313                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3314                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3315         }
3316
3317         spin_unlock_irqrestore(&nesqp->lock, flags);
3318
3319 out:
3320         if (err)
3321                 *bad_wr = ib_wr;
3322         return err;
3323 }
3324
3325
3326 /**
3327  * nes_post_recv
3328  */
3329 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3330                 struct ib_recv_wr **bad_wr)
3331 {
3332         u64 u64temp;
3333         unsigned long flags = 0;
3334         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3335         struct nes_device *nesdev = nesvnic->nesdev;
3336         struct nes_qp *nesqp = to_nesqp(ibqp);
3337         struct nes_hw_qp_wqe *wqe;
3338         int err = 0;
3339         int sge_index;
3340         u32 qsize = nesqp->hwqp.rq_size;
3341         u32 head;
3342         u32 wqe_count = 0;
3343         u32 counter;
3344         u32 total_payload_length;
3345
3346         if (nesqp->ibqp_state > IB_QPS_RTS) {
3347                 err = -EINVAL;
3348                 goto out;
3349         }
3350
3351         spin_lock_irqsave(&nesqp->lock, flags);
3352
3353         head = nesqp->hwqp.rq_head;
3354
3355         while (ib_wr) {
3356                 /* Check for QP error */
3357                 if (nesqp->term_flags) {
3358                         err = -EINVAL;
3359                         break;
3360                 }
3361
3362                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3363                         err = -EINVAL;
3364                         break;
3365                 }
3366                 /* Check for RQ overflow */
3367                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3368                         err = -ENOMEM;
3369                         break;
3370                 }
3371
3372                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3373                 wqe = &nesqp->hwqp.rq_vbase[head];
3374
3375                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3376                                 nesqp->hwqp.qp_id, wqe, head); */
3377                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3378                 u64temp = (u64)(ib_wr->wr_id);
3379                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3380                                         u64temp);
3381                 total_payload_length = 0;
3382                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3383                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3384                                         ib_wr->sg_list[sge_index].addr);
3385                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3386                                         ib_wr->sg_list[sge_index].length);
3387                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3388                                         ib_wr->sg_list[sge_index].lkey);
3389
3390                         total_payload_length += ib_wr->sg_list[sge_index].length;
3391                 }
3392                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3393                                         total_payload_length);
3394
3395                 ib_wr = ib_wr->next;
3396                 head++;
3397                 wqe_count++;
3398                 if (head >= qsize)
3399                         head = 0;
3400         }
3401
3402         nesqp->hwqp.rq_head = head;
3403         barrier();
3404         while (wqe_count) {
3405                 counter = min(wqe_count, ((u32)255));
3406                 wqe_count -= counter;
3407                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3408         }
3409
3410         spin_unlock_irqrestore(&nesqp->lock, flags);
3411
3412 out:
3413         if (err)
3414                 *bad_wr = ib_wr;
3415         return err;
3416 }
3417
3418 /**
3419  * nes_drain_sq - drain sq
3420  * @ibqp: pointer to ibqp
3421  */
3422 static void nes_drain_sq(struct ib_qp *ibqp)
3423 {
3424         struct nes_qp *nesqp = to_nesqp(ibqp);
3425
3426         if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
3427                 wait_for_completion(&nesqp->sq_drained);
3428 }
3429
3430 /**
3431  * nes_drain_rq - drain rq
3432  * @ibqp: pointer to ibqp
3433  */
3434 static void nes_drain_rq(struct ib_qp *ibqp)
3435 {
3436         struct nes_qp *nesqp = to_nesqp(ibqp);
3437
3438         if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
3439                 wait_for_completion(&nesqp->rq_drained);
3440 }
3441
3442 /**
3443  * nes_poll_cq
3444  */
3445 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3446 {
3447         u64 u64temp;
3448         u64 wrid;
3449         unsigned long flags = 0;
3450         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3451         struct nes_device *nesdev = nesvnic->nesdev;
3452         struct nes_cq *nescq = to_nescq(ibcq);
3453         struct nes_qp *nesqp;
3454         struct nes_hw_cqe cqe;
3455         u32 head;
3456         u32 wq_tail = 0;
3457         u32 cq_size;
3458         u32 cqe_count = 0;
3459         u32 wqe_index;
3460         u32 u32temp;
3461         u32 move_cq_head = 1;
3462         u32 err_code;
3463
3464         nes_debug(NES_DBG_CQ, "\n");
3465
3466         spin_lock_irqsave(&nescq->lock, flags);
3467
3468         head = nescq->hw_cq.cq_head;
3469         cq_size = nescq->hw_cq.cq_size;
3470
3471         while (cqe_count < num_entries) {
3472                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3473                                 NES_CQE_VALID) == 0)
3474                         break;
3475
3476                 /*
3477                  * Make sure we read CQ entry contents *after*
3478                  * we've checked the valid bit.
3479                  */
3480                 rmb();
3481
3482                 cqe = nescq->hw_cq.cq_vbase[head];
3483                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3484                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3485                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3486                 /* parse CQE, get completion context from WQE (either rq or sq) */
3487                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3488                                 ((u64)u32temp);
3489
3490                 if (u64temp) {
3491                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3492                         memset(entry, 0, sizeof *entry);
3493                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3494                                 entry->status = IB_WC_SUCCESS;
3495                         } else {
3496                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3497                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3498                                         entry->status = err_code & 0x0000ffff;
3499
3500                                         /* The rest of the cqe's will be marked as flushed */
3501                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3502                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3503                                                             NES_IWARP_CQE_MINOR_FLUSH);
3504                                 } else
3505                                         entry->status = IB_WC_WR_FLUSH_ERR;
3506                         }
3507
3508                         entry->qp = &nesqp->ibqp;
3509                         entry->src_qp = nesqp->hwqp.qp_id;
3510
3511                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3512                                 if (nesqp->skip_lsmm) {
3513                                         nesqp->skip_lsmm = 0;
3514                                         nesqp->hwqp.sq_tail++;
3515                                 }
3516
3517                                 /* Working on a SQ Completion*/
3518                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3519                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3520                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3521                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3522                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3523                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3524
3525                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3526                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3527                                         case NES_IWARP_SQ_OP_RDMAW:
3528                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3529                                                 entry->opcode = IB_WC_RDMA_WRITE;
3530                                                 break;
3531                                         case NES_IWARP_SQ_OP_RDMAR:
3532                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3533                                                 entry->opcode = IB_WC_RDMA_READ;
3534                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3535                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3536                                                 break;
3537                                         case NES_IWARP_SQ_OP_SENDINV:
3538                                         case NES_IWARP_SQ_OP_SENDSEINV:
3539                                         case NES_IWARP_SQ_OP_SEND:
3540                                         case NES_IWARP_SQ_OP_SENDSE:
3541                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3542                                                 entry->opcode = IB_WC_SEND;
3543                                                 break;
3544                                         case NES_IWARP_SQ_OP_LOCINV:
3545                                                 entry->opcode = IB_WC_LOCAL_INV;
3546                                                 break;
3547                                         case NES_IWARP_SQ_OP_FAST_REG:
3548                                                 entry->opcode = IB_WC_REG_MR;
3549                                                 break;
3550                                 }
3551
3552                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3553                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3554                                         move_cq_head = 0;
3555                                         wq_tail = nesqp->hwqp.sq_tail;
3556                                 }
3557                         } else {
3558                                 /* Working on a RQ Completion*/
3559                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3560                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3561                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3562                                 entry->opcode = IB_WC_RECV;
3563
3564                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3565                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3566                                         move_cq_head = 0;
3567                                         wq_tail = nesqp->hwqp.rq_tail;
3568                                 }
3569                         }
3570
3571                         if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
3572                                 if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
3573                                         complete(&nesqp->sq_drained);
3574                                 if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
3575                                         complete(&nesqp->rq_drained);
3576                         }
3577
3578                         entry->wr_id = wrid;
3579                         entry++;
3580                         cqe_count++;
3581                 }
3582
3583                 if (move_cq_head) {
3584                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3585                         if (++head >= cq_size)
3586                                 head = 0;
3587                         nescq->polled_completions++;
3588
3589                         if ((nescq->polled_completions > (cq_size / 2)) ||
3590                                         (nescq->polled_completions == 255)) {
3591                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3592                                         " are pending %u of %u.\n",
3593                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3594                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3595                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3596                                 nescq->polled_completions = 0;
3597                         }
3598                 } else {
3599                         /* Update the wqe index and set status to flush */
3600                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3601                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3602                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3603                                 cpu_to_le32(wqe_index);
3604                         move_cq_head = 1; /* ready for next pass */
3605                 }
3606         }
3607
3608         if (nescq->polled_completions) {
3609                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3610                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3611                 nescq->polled_completions = 0;
3612         }
3613
3614         nescq->hw_cq.cq_head = head;
3615         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3616                         cqe_count, nescq->hw_cq.cq_number);
3617
3618         spin_unlock_irqrestore(&nescq->lock, flags);
3619
3620         return cqe_count;
3621 }
3622
3623
3624 /**
3625  * nes_req_notify_cq
3626  */
3627 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3628                 {
3629         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3630         struct nes_device *nesdev = nesvnic->nesdev;
3631         struct nes_cq *nescq = to_nescq(ibcq);
3632         u32 cq_arm;
3633
3634         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3635                         nescq->hw_cq.cq_number);
3636
3637         cq_arm = nescq->hw_cq.cq_number;
3638         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3639                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3640         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3641                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3642         else
3643                 return -EINVAL;
3644
3645         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3646         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3647
3648         return 0;
3649 }
3650
3651 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3652                               struct ib_port_immutable *immutable)
3653 {
3654         struct ib_port_attr attr;
3655         int err;
3656
3657         immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3658
3659         err = nes_query_port(ibdev, port_num, &attr);
3660         if (err)
3661                 return err;
3662
3663         immutable->pkey_tbl_len = attr.pkey_tbl_len;
3664         immutable->gid_tbl_len = attr.gid_tbl_len;
3665
3666         return 0;
3667 }
3668
3669 static void get_dev_fw_str(struct ib_device *dev, char *str)
3670 {
3671         struct nes_ib_device *nesibdev =
3672                         container_of(dev, struct nes_ib_device, ibdev);
3673         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3674
3675         nes_debug(NES_DBG_INIT, "\n");
3676         snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u",
3677                  (nesvnic->nesdev->nesadapter->firmware_version >> 16),
3678                  (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
3679 }
3680
3681 /**
3682  * nes_init_ofa_device
3683  */
3684 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3685 {
3686         struct nes_ib_device *nesibdev;
3687         struct nes_vnic *nesvnic = netdev_priv(netdev);
3688         struct nes_device *nesdev = nesvnic->nesdev;
3689
3690         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3691         if (nesibdev == NULL) {
3692                 return NULL;
3693         }
3694         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3695         nesibdev->ibdev.owner = THIS_MODULE;
3696
3697         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3698         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3699         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3700
3701         nesibdev->ibdev.uverbs_cmd_mask =
3702                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3703                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3704                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3705                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3706                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3707                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3708                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3709                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3710                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3711                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3712                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3713                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3714                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3715                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3716                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3717                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3718                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3719                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3720                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3721                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3722                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3723                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3724
3725         nesibdev->ibdev.phys_port_cnt = 1;
3726         nesibdev->ibdev.num_comp_vectors = 1;
3727         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3728         nesibdev->ibdev.query_device = nes_query_device;
3729         nesibdev->ibdev.query_port = nes_query_port;
3730         nesibdev->ibdev.query_pkey = nes_query_pkey;
3731         nesibdev->ibdev.query_gid = nes_query_gid;
3732         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3733         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3734         nesibdev->ibdev.mmap = nes_mmap;
3735         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3736         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3737         nesibdev->ibdev.create_ah = nes_create_ah;
3738         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3739         nesibdev->ibdev.create_qp = nes_create_qp;
3740         nesibdev->ibdev.modify_qp = nes_modify_qp;
3741         nesibdev->ibdev.query_qp = nes_query_qp;
3742         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3743         nesibdev->ibdev.create_cq = nes_create_cq;
3744         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3745         nesibdev->ibdev.poll_cq = nes_poll_cq;
3746         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3747         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3748         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3749         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3750         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3751
3752         nesibdev->ibdev.alloc_mr = nes_alloc_mr;
3753         nesibdev->ibdev.map_mr_sg = nes_map_mr_sg;
3754
3755         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3756         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3757         nesibdev->ibdev.process_mad = nes_process_mad;
3758
3759         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3760         nesibdev->ibdev.post_send = nes_post_send;
3761         nesibdev->ibdev.post_recv = nes_post_recv;
3762         nesibdev->ibdev.drain_sq = nes_drain_sq;
3763         nesibdev->ibdev.drain_rq = nes_drain_rq;
3764
3765         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3766         if (nesibdev->ibdev.iwcm == NULL) {
3767                 ib_dealloc_device(&nesibdev->ibdev);
3768                 return NULL;
3769         }
3770         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3771         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3772         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3773         nesibdev->ibdev.iwcm->connect = nes_connect;
3774         nesibdev->ibdev.iwcm->accept = nes_accept;
3775         nesibdev->ibdev.iwcm->reject = nes_reject;
3776         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3777         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3778         nesibdev->ibdev.get_port_immutable   = nes_port_immutable;
3779         nesibdev->ibdev.get_dev_fw_str   = get_dev_fw_str;
3780         memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3781                sizeof(nesibdev->ibdev.iwcm->ifname));
3782
3783         return nesibdev;
3784 }
3785
3786
3787 /**
3788  * nes_handle_delayed_event
3789  */
3790 static void nes_handle_delayed_event(struct timer_list *t)
3791 {
3792         struct nes_vnic *nesvnic = from_timer(nesvnic, t, event_timer);
3793
3794         if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3795                 struct ib_event event;
3796
3797                 event.device = &nesvnic->nesibdev->ibdev;
3798                 if (!event.device)
3799                         goto stop_timer;
3800                 event.event = nesvnic->delayed_event;
3801                 event.element.port_num = nesvnic->logical_port + 1;
3802                 ib_dispatch_event(&event);
3803         }
3804
3805 stop_timer:
3806         nesvnic->event_timer.function = NULL;
3807 }
3808
3809
3810 void  nes_port_ibevent(struct nes_vnic *nesvnic)
3811 {
3812         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3813         struct nes_device *nesdev = nesvnic->nesdev;
3814         struct ib_event event;
3815         event.device = &nesibdev->ibdev;
3816         event.element.port_num = nesvnic->logical_port + 1;
3817         event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3818
3819         if (!nesvnic->event_timer.function) {
3820                 ib_dispatch_event(&event);
3821                 nesvnic->last_dispatched_event = event.event;
3822                 nesvnic->event_timer.function = nes_handle_delayed_event;
3823                 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3824                 add_timer(&nesvnic->event_timer);
3825         } else {
3826                 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3827         }
3828         nesvnic->delayed_event = event.event;
3829 }
3830
3831
3832 /**
3833  * nes_destroy_ofa_device
3834  */
3835 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3836 {
3837         if (nesibdev == NULL)
3838                 return;
3839
3840         nes_unregister_ofa_device(nesibdev);
3841
3842         kfree(nesibdev->ibdev.iwcm);
3843         ib_dealloc_device(&nesibdev->ibdev);
3844 }
3845
3846
3847 /**
3848  * nes_register_ofa_device
3849  */
3850 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3851 {
3852         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3853         struct nes_device *nesdev = nesvnic->nesdev;
3854         struct nes_adapter *nesadapter = nesdev->nesadapter;
3855         int i, ret;
3856
3857         nesvnic->nesibdev->ibdev.driver_id = RDMA_DRIVER_NES;
3858         ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
3859         if (ret) {
3860                 return ret;
3861         }
3862
3863         /* Get the resources allocated to this device */
3864         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3865         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3866         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3867         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3868
3869         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3870                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3871                 if (ret) {
3872                         while (i > 0) {
3873                                 i--;
3874                                 device_remove_file(&nesibdev->ibdev.dev,
3875                                                    nes_dev_attributes[i]);
3876                         }
3877                         ib_unregister_device(&nesibdev->ibdev);
3878                         return ret;
3879                 }
3880         }
3881
3882         nesvnic->of_device_registered = 1;
3883
3884         return 0;
3885 }
3886
3887
3888 /**
3889  * nes_unregister_ofa_device
3890  */
3891 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3892 {
3893         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3894         int i;
3895
3896         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3897                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3898         }
3899
3900         if (nesvnic->of_device_registered) {
3901                 ib_unregister_device(&nesibdev->ibdev);
3902         }
3903
3904         nesvnic->of_device_registered = 0;
3905 }