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         memset(props, 0, sizeof(*props));
 479
 480         props->max_mtu = IB_MTU_4096;
 481
 482         if (netdev->mtu  >= 4096)
 483                 props->active_mtu = IB_MTU_4096;
 484         else if (netdev->mtu  >= 2048)
 485                 props->active_mtu = IB_MTU_2048;
 486         else if (netdev->mtu  >= 1024)
 487                 props->active_mtu = IB_MTU_1024;
 488         else if (netdev->mtu  >= 512)
 489                 props->active_mtu = IB_MTU_512;
 490         else
 491                 props->active_mtu = IB_MTU_256;
 492
 493         props->lid = 1;
 494         props->lmc = 0;
 495         props->sm_lid = 0;
 496         props->sm_sl = 0;
 497         if (netif_queue_stopped(netdev))
 498                 props->state = IB_PORT_DOWN;
 499         else if (nesvnic->linkup)
 500                 props->state = IB_PORT_ACTIVE;
 501         else
 502                 props->state = IB_PORT_DOWN;
 503         props->phys_state = 0;
 504         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 505                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 506         props->gid_tbl_len = 1;
 507         props->pkey_tbl_len = 1;
 508         props->qkey_viol_cntr = 0;
 509         props->active_width = IB_WIDTH_4X;
 510         props->active_speed = IB_SPEED_SDR;
 511         props->max_msg_sz = 0x80000000;
 512
 513         return 0;
 514 }
 515
 516 /**
 517  * nes_query_pkey
 518  */
 519 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 520 {
 521         *pkey = 0;
 522         return 0;
 523 }
 524
 525
 526 /**
 527  * nes_query_gid
 528  */
 529 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 530                 int index, union ib_gid *gid)
 531 {
 532         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 533
 534         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 535         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 536
 537         return 0;
 538 }
 539
 540
 541 /**
 542  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 543  * of all objects associated with a particular user-mode client.
 544  */
 545 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 546                 struct ib_udata *udata)
 547 {
 548         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 549         struct nes_device *nesdev = nesvnic->nesdev;
 550         struct nes_adapter *nesadapter = nesdev->nesadapter;
 551         struct nes_alloc_ucontext_req req;
 552         struct nes_alloc_ucontext_resp uresp;
 553         struct nes_ucontext *nes_ucontext;
 554         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 555
 556
 557         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 558                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 559                 return ERR_PTR(-EINVAL);
 560         }
 561
 562         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 563                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 564                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 565                 return ERR_PTR(-EINVAL);
 566         }
 567
 568
 569         memset(&uresp, 0, sizeof uresp);
 570
 571         uresp.max_qps = nesibdev->max_qp;
 572         uresp.max_pds = nesibdev->max_pd;
 573         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 574         uresp.virtwq = nesadapter->virtwq;
 575         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 576
 577         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 578         if (!nes_ucontext)
 579                 return ERR_PTR(-ENOMEM);
 580
 581         nes_ucontext->nesdev = nesdev;
 582         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 583         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 584                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 585                         PAGE_SIZE;
 586
 587
 588         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 589                 kfree(nes_ucontext);
 590                 return ERR_PTR(-EFAULT);
 591         }
 592
 593         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 594         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 595         atomic_set(&nes_ucontext->usecnt, 1);
 596         return &nes_ucontext->ibucontext;
 597 }
 598
 599
 600 /**
 601  * nes_dealloc_ucontext
 602  */
 603 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 604 {
 605         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 606         /* struct nes_device *nesdev = nesvnic->nesdev; */
 607         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 608
 609         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 610           return 0;
 611         kfree(nes_ucontext);
 612         return 0;
 613 }
 614
 615
 616 /**
 617  * nes_mmap
 618  */
 619 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 620 {
 621         unsigned long index;
 622         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 623         struct nes_device *nesdev = nesvnic->nesdev;
 624         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 625         struct nes_ucontext *nes_ucontext;
 626         struct nes_qp *nesqp;
 627
 628         nes_ucontext = to_nesucontext(context);
 629
 630
 631         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 632                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 633                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 634                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 635                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 636                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 637                         return -EFAULT;
 638                 }
 639                 nesqp = nes_ucontext->mmap_nesqp[index];
 640                 if (nesqp == NULL) {
 641                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 642                         return -EFAULT;
 643                 }
 644                 if (remap_pfn_range(vma, vma->vm_start,
 645                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 646                                 vma->vm_end - vma->vm_start,
 647                                 vma->vm_page_prot)) {
 648                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 649                         return -EAGAIN;
 650                 }
 651                 vma->vm_private_data = nesqp;
 652                 return 0;
 653         } else {
 654                 index = vma->vm_pgoff;
 655                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 656                         return -EFAULT;
 657
 658                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 659                 if (io_remap_pfn_range(vma, vma->vm_start,
 660                                 (nesdev->doorbell_start +
 661                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 662                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 663                         return -EAGAIN;
 664                 vma->vm_private_data = nes_ucontext;
 665                 return 0;
 666         }
 667
 668         return -ENOSYS;
 669 }
 670
 671
 672 /**
 673  * nes_alloc_pd
 674  */
 675 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 676                 struct ib_ucontext *context, struct ib_udata *udata)
 677 {
 678         struct nes_pd *nespd;
 679         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 680         struct nes_device *nesdev = nesvnic->nesdev;
 681         struct nes_adapter *nesadapter = nesdev->nesadapter;
 682         struct nes_ucontext *nesucontext;
 683         struct nes_alloc_pd_resp uresp;
 684         u32 pd_num = 0;
 685         int err;
 686
 687         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 688                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 689                         netdev_refcnt_read(nesvnic->netdev));
 690
 691         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 692                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
 693         if (err) {
 694                 return ERR_PTR(err);
 695         }
 696
 697         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 698         if (!nespd) {
 699                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 700                 return ERR_PTR(-ENOMEM);
 701         }
 702
 703         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 704                         nespd, nesvnic->nesibdev->ibdev.name);
 705
 706         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 707
 708         if (context) {
 709                 nesucontext = to_nesucontext(context);
 710                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 711                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 712                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 713                                 nespd->mmap_db_index, nespd->pd_id);
 714                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 715                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 716                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 717                         kfree(nespd);
 718                         return ERR_PTR(-ENOMEM);
 719                 }
 720
 721                 uresp.pd_id = nespd->pd_id;
 722                 uresp.mmap_db_index = nespd->mmap_db_index;
 723                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 724                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 725                         kfree(nespd);
 726                         return ERR_PTR(-EFAULT);
 727                 }
 728
 729                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 730                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 731                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 732         }
 733
 734         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 735         return &nespd->ibpd;
 736 }
 737
 738
 739 /**
 740  * nes_dealloc_pd
 741  */
 742 static int nes_dealloc_pd(struct ib_pd *ibpd)
 743 {
 744         struct nes_ucontext *nesucontext;
 745         struct nes_pd *nespd = to_nespd(ibpd);
 746         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 747         struct nes_device *nesdev = nesvnic->nesdev;
 748         struct nes_adapter *nesadapter = nesdev->nesadapter;
 749
 750         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 751                 nesucontext = to_nesucontext(ibpd->uobject->context);
 752                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 753                                 nespd->mmap_db_index);
 754                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 755                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 756                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 757                         nesucontext->first_free_db = nespd->mmap_db_index;
 758                 }
 759         }
 760
 761         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 762                         nespd->pd_id, nespd);
 763         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 764                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 765         kfree(nespd);
 766
 767         return 0;
 768 }
 769
 770
 771 /**
 772  * nes_create_ah
 773  */
 774 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 775 {
 776         return ERR_PTR(-ENOSYS);
 777 }
 778
 779
 780 /**
 781  * nes_destroy_ah
 782  */
 783 static int nes_destroy_ah(struct ib_ah *ah)
 784 {
 785         return -ENOSYS;
 786 }
 787
 788
 789 /**
 790  * nes_get_encoded_size
 791  */
 792 static inline u8 nes_get_encoded_size(int *size)
 793 {
 794         u8 encoded_size = 0;
 795         if (*size <= 32) {
 796                 *size = 32;
 797                 encoded_size = 1;
 798         } else if (*size <= 128) {
 799                 *size = 128;
 800                 encoded_size = 2;
 801         } else if (*size <= 512) {
 802                 *size = 512;
 803                 encoded_size = 3;
 804         }
 805         return (encoded_size);
 806 }
 807
 808
 809
 810 /**
 811  * nes_setup_virt_qp
 812  */
 813 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 814                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 815 {
 816         unsigned long flags;
 817         void *mem;
 818         __le64 *pbl = NULL;
 819         __le64 *tpbl;
 820         __le64 *pblbuffer;
 821         struct nes_device *nesdev = nesvnic->nesdev;
 822         struct nes_adapter *nesadapter = nesdev->nesadapter;
 823         u32 pbl_entries;
 824         u8 rq_pbl_entries;
 825         u8 sq_pbl_entries;
 826
 827         pbl_entries = nespbl->pbl_size >> 3;
 828         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 829                         nespbl->pbl_size, pbl_entries,
 830                         (void *)nespbl->pbl_vbase,
 831                         (unsigned long) nespbl->pbl_pbase);
 832         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 833         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 834         /* the first pbl to be fro the rq_vbase... */
 835         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 836         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 837         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 838         if (!nespbl->page) {
 839                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 840                 kfree(nespbl);
 841                 return -ENOMEM;
 842         }
 843
 844         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 845         nesqp->page = nespbl->page;
 846         if (!nesqp->hwqp.sq_vbase) {
 847                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 848                 kfree(nespbl);
 849                 return -ENOMEM;
 850         }
 851
 852         /* Now to get to sq.. we need to calculate how many */
 853         /* PBL entries were used by the rq.. */
 854         pbl += sq_pbl_entries;
 855         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 856         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 857         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 858
 859         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 860                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 861                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 862         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 863         if (!nesadapter->free_256pbl) {
 864                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 865                                 nespbl->pbl_pbase);
 866                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 867                 kunmap(nesqp->page);
 868                 kfree(nespbl);
 869                 return -ENOMEM;
 870         }
 871         nesadapter->free_256pbl--;
 872         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 873
 874         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 875         pblbuffer = nesqp->pbl_vbase;
 876         if (!nesqp->pbl_vbase) {
 877                 /* memory allocated during nes_reg_user_mr() */
 878                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 879                                     nespbl->pbl_pbase);
 880                 kfree(nespbl);
 881                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 882                 nesadapter->free_256pbl++;
 883                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 884                 kunmap(nesqp->page);
 885                 return -ENOMEM;
 886         }
 887         memset(nesqp->pbl_vbase, 0, 256);
 888         /* fill in the page address in the pbl buffer.. */
 889         tpbl = pblbuffer + 16;
 890         pbl = (__le64 *)nespbl->pbl_vbase;
 891         while (sq_pbl_entries--)
 892                 *tpbl++ = *pbl++;
 893         tpbl = pblbuffer;
 894         while (rq_pbl_entries--)
 895                 *tpbl++ = *pbl++;
 896
 897         /* done with memory allocated during nes_reg_user_mr() */
 898         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 899                             nespbl->pbl_pbase);
 900         kfree(nespbl);
 901
 902         nesqp->qp_mem_size =
 903                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
 904         /* Round up to a multiple of a page */
 905         nesqp->qp_mem_size += PAGE_SIZE - 1;
 906         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 907
 908         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 909                         &nesqp->hwqp.q2_pbase);
 910
 911         if (!mem) {
 912                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
 913                 nesqp->pbl_vbase = NULL;
 914                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 915                 nesadapter->free_256pbl++;
 916                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 917                 kunmap(nesqp->page);
 918                 return -ENOMEM;
 919         }
 920         nesqp->sq_kmapped = 1;
 921         nesqp->hwqp.q2_vbase = mem;
 922         mem += 256;
 923         memset(nesqp->hwqp.q2_vbase, 0, 256);
 924         nesqp->nesqp_context = mem;
 925         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
 926         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
 927
 928         return 0;
 929 }
 930
 931
 932 /**
 933  * nes_setup_mmap_qp
 934  */
 935 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
 936                 int sq_size, int rq_size)
 937 {
 938         void *mem;
 939         struct nes_device *nesdev = nesvnic->nesdev;
 940
 941         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
 942                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
 943                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
 944                         256; /* this is Q2 */
 945         /* Round up to a multiple of a page */
 946         nesqp->qp_mem_size += PAGE_SIZE - 1;
 947         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 948
 949         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 950                         &nesqp->hwqp.sq_pbase);
 951         if (!mem)
 952                 return -ENOMEM;
 953         nes_debug(NES_DBG_QP, "PCI consistent memory for "
 954                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
 955                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
 956
 957         memset(mem, 0, nesqp->qp_mem_size);
 958
 959         nesqp->hwqp.sq_vbase = mem;
 960         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
 961
 962         nesqp->hwqp.rq_vbase = mem;
 963         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
 964                         sizeof(struct nes_hw_qp_wqe) * sq_size;
 965         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
 966
 967         nesqp->hwqp.q2_vbase = mem;
 968         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
 969                         sizeof(struct nes_hw_qp_wqe) * rq_size;
 970         mem += 256;
 971         memset(nesqp->hwqp.q2_vbase, 0, 256);
 972
 973         nesqp->nesqp_context = mem;
 974         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
 975         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
 976         return 0;
 977 }
 978
 979
 980 /**
 981  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
 982  */
 983 static void nes_free_qp_mem(struct nes_device *nesdev,
 984                 struct nes_qp *nesqp, int virt_wqs)
 985 {
 986         unsigned long flags;
 987         struct nes_adapter *nesadapter = nesdev->nesadapter;
 988         if (!virt_wqs) {
 989                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 990                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
 991         }else {
 992                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 993                 nesadapter->free_256pbl++;
 994                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 995                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
 996                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
 997                 nesqp->pbl_vbase = NULL;
 998                 if (nesqp->sq_kmapped) {
 999                         nesqp->sq_kmapped = 0;
1000                         kunmap(nesqp->page);
1001                 }
1002         }
1003 }
1004
1005
1006 /**
1007  * nes_create_qp
1008  */
1009 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1010                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1011 {
1012         u64 u64temp= 0;
1013         u64 u64nesqp = 0;
1014         struct nes_pd *nespd = to_nespd(ibpd);
1015         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1016         struct nes_device *nesdev = nesvnic->nesdev;
1017         struct nes_adapter *nesadapter = nesdev->nesadapter;
1018         struct nes_qp *nesqp;
1019         struct nes_cq *nescq;
1020         struct nes_ucontext *nes_ucontext;
1021         struct nes_hw_cqp_wqe *cqp_wqe;
1022         struct nes_cqp_request *cqp_request;
1023         struct nes_create_qp_req req;
1024         struct nes_create_qp_resp uresp;
1025         struct nes_pbl  *nespbl = NULL;
1026         u32 qp_num = 0;
1027         u32 opcode = 0;
1028         /* u32 counter = 0; */
1029         void *mem;
1030         unsigned long flags;
1031         int ret;
1032         int err;
1033         int virt_wqs = 0;
1034         int sq_size;
1035         int rq_size;
1036         u8 sq_encoded_size;
1037         u8 rq_encoded_size;
1038         /* int counter; */
1039
1040         if (init_attr->create_flags)
1041                 return ERR_PTR(-EINVAL);
1042
1043         atomic_inc(&qps_created);
1044         switch (init_attr->qp_type) {
1045                 case IB_QPT_RC:
1046                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1047                                 init_attr->cap.max_inline_data = 0;
1048                         } else {
1049                                 init_attr->cap.max_inline_data = 64;
1050                         }
1051                         sq_size = init_attr->cap.max_send_wr;
1052                         rq_size = init_attr->cap.max_recv_wr;
1053
1054                         /* check if the encoded sizes are OK or not... */
1055                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1056                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1057
1058                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1059                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1060                                                 rq_size, sq_size);
1061                                 return ERR_PTR(-EINVAL);
1062                         }
1063
1064                         init_attr->cap.max_send_wr = sq_size -2;
1065                         init_attr->cap.max_recv_wr = rq_size -1;
1066                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1067
1068                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1069                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1070                         if (ret) {
1071                                 return ERR_PTR(ret);
1072                         }
1073
1074                         /* Need 512 (actually now 1024) byte alignment on this structure */
1075                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1076                         if (!mem) {
1077                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1078                                 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1079                                 return ERR_PTR(-ENOMEM);
1080                         }
1081                         u64nesqp = (unsigned long)mem;
1082                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1083                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1084                         u64nesqp &= ~u64temp;
1085                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1086                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1087                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1088                         nesqp->allocated_buffer = mem;
1089
1090                         if (udata) {
1091                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1092                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1093                                         kfree(nesqp->allocated_buffer);
1094                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1095                                         return ERR_PTR(-EFAULT);
1096                                 }
1097                                 if (req.user_wqe_buffers) {
1098                                         virt_wqs = 1;
1099                                 }
1100                                 if (req.user_qp_buffer)
1101                                         nesqp->nesuqp_addr = req.user_qp_buffer;
1102                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1103                                         nesqp->user_mode = 1;
1104                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1105                                         if (virt_wqs) {
1106                                                 err = 1;
1107                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1108                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1109                                                                 list_del(&nespbl->list);
1110                                                                 err = 0;
1111                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1112                                                                           nespbl, nespbl->user_base);
1113                                                                 break;
1114                                                         }
1115                                                 }
1116                                                 if (err) {
1117                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1118                                                                   (long long unsigned int)req.user_wqe_buffers);
1119                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1120                                                         kfree(nesqp->allocated_buffer);
1121                                                         return ERR_PTR(-EFAULT);
1122                                                 }
1123                                         }
1124
1125                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1126                                         nesqp->mmap_sq_db_index =
1127                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1128                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1129                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1130                                                         nespd->mmap_db_index); */
1131                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1132                                                 nes_debug(NES_DBG_QP,
1133                                                           "db index > max user regions, failing create QP\n");
1134                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1135                                                 if (virt_wqs) {
1136                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1137                                                                             nespbl->pbl_pbase);
1138                                                         kfree(nespbl);
1139                                                 }
1140                                                 kfree(nesqp->allocated_buffer);
1141                                                 return ERR_PTR(-ENOMEM);
1142                                         }
1143                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1144                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1145                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1146                                 } else {
1147                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1148                                         kfree(nesqp->allocated_buffer);
1149                                         return ERR_PTR(-EFAULT);
1150                                 }
1151                         }
1152                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1153                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1154                         if (err) {
1155                                 nes_debug(NES_DBG_QP,
1156                                           "error geting qp mem code = %d\n", err);
1157                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1158                                 kfree(nesqp->allocated_buffer);
1159                                 return ERR_PTR(-ENOMEM);
1160                         }
1161
1162                         nesqp->hwqp.sq_size = sq_size;
1163                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1164                         nesqp->hwqp.sq_head = 1;
1165                         nesqp->hwqp.rq_size = rq_size;
1166                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1167                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1168                                         (void *)nesqp->nesqp_context_pbase);
1169                         */
1170                         nesqp->hwqp.qp_id = qp_num;
1171                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1172                         nesqp->nespd = nespd;
1173
1174                         nescq = to_nescq(init_attr->send_cq);
1175                         nesqp->nesscq = nescq;
1176                         nescq = to_nescq(init_attr->recv_cq);
1177                         nesqp->nesrcq = nescq;
1178
1179                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1180                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1181                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1182                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1183                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1184                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1185                         if (!udata) {
1186                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1187                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1188                         }
1189                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1190                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1191                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1192                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1193                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1194
1195
1196                         if (!virt_wqs) {
1197                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1198                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1199                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1200                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1201                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1202                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1203                         } else {
1204                                 u64temp = (u64)nesqp->pbl_pbase;
1205                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1206                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1207                         }
1208
1209                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1210                                         nesvnic->next_qp_nic_index,
1211                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1212                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1213                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1214                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1215                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1216                         nesvnic->next_qp_nic_index++;
1217                         if ((nesvnic->next_qp_nic_index > 3) ||
1218                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1219                                 nesvnic->next_qp_nic_index = 0;
1220                         }
1221                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1222
1223                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1224                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1225                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1226                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1227                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1228                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1229                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1230                                         NES_QPCONTEXT_ORDIRD_AAH |
1231                                         ((((u32)nesadapter->max_irrq_wr) <<
1232                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1233                         if (disable_mpa_crc) {
1234                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1235                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1236                         }
1237
1238
1239                         /* Create the QP */
1240                         cqp_request = nes_get_cqp_request(nesdev);
1241                         if (cqp_request == NULL) {
1242                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1243                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1244                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1245                                 kfree(nesqp->allocated_buffer);
1246                                 return ERR_PTR(-ENOMEM);
1247                         }
1248                         cqp_request->waiting = 1;
1249                         cqp_wqe = &cqp_request->cqp_wqe;
1250
1251                         if (!virt_wqs) {
1252                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1253                                         NES_CQP_QP_IWARP_STATE_IDLE;
1254                         } else {
1255                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1256                                         NES_CQP_QP_IWARP_STATE_IDLE;
1257                         }
1258                         opcode |= NES_CQP_QP_CQS_VALID;
1259                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1260                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1261                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1262
1263                         u64temp = (u64)nesqp->nesqp_context_pbase;
1264                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1265
1266                         atomic_set(&cqp_request->refcount, 2);
1267                         nes_post_cqp_request(nesdev, cqp_request);
1268
1269                         /* Wait for CQP */
1270                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1271                                         nesqp->hwqp.qp_id);
1272                         ret = wait_event_timeout(cqp_request->waitq,
1273                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1274                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1275                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1276                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1277                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1278                                         cqp_request->major_code, cqp_request->minor_code);
1279                         if ((!ret) || (cqp_request->major_code)) {
1280                                 nes_put_cqp_request(nesdev, cqp_request);
1281                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1282                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1283                                 kfree(nesqp->allocated_buffer);
1284                                 if (!ret) {
1285                                         return ERR_PTR(-ETIME);
1286                                 } else {
1287                                         return ERR_PTR(-EIO);
1288                                 }
1289                         }
1290
1291                         nes_put_cqp_request(nesdev, cqp_request);
1292
1293                         if (ibpd->uobject) {
1294                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1295                                 uresp.mmap_rq_db_index = 0;
1296                                 uresp.actual_sq_size = sq_size;
1297                                 uresp.actual_rq_size = rq_size;
1298                                 uresp.qp_id = nesqp->hwqp.qp_id;
1299                                 uresp.nes_drv_opt = nes_drv_opt;
1300                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1301                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1302                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1303                                         kfree(nesqp->allocated_buffer);
1304                                         return ERR_PTR(-EFAULT);
1305                                 }
1306                         }
1307
1308                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1309                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1310                         spin_lock_init(&nesqp->lock);
1311                         nes_add_ref(&nesqp->ibqp);
1312                         break;
1313                 default:
1314                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1315                         return ERR_PTR(-EINVAL);
1316         }
1317         init_completion(&nesqp->sq_drained);
1318         init_completion(&nesqp->rq_drained);
1319
1320         nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1321         init_timer(&nesqp->terminate_timer);
1322         nesqp->terminate_timer.function = nes_terminate_timeout;
1323         nesqp->terminate_timer.data = (unsigned long)nesqp;
1324
1325         /* update the QP table */
1326         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1327         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1328                         netdev_refcnt_read(nesvnic->netdev));
1329
1330         return &nesqp->ibqp;
1331 }
1332
1333 /**
1334  * nes_clean_cq
1335  */
1336 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1337 {
1338         u32 cq_head;
1339         u32 lo;
1340         u32 hi;
1341         u64 u64temp;
1342         unsigned long flags = 0;
1343
1344         spin_lock_irqsave(&nescq->lock, flags);
1345
1346         cq_head = nescq->hw_cq.cq_head;
1347         while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1348                 rmb();
1349                 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1350                 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1351                 u64temp = (((u64)hi) << 32) | ((u64)lo);
1352                 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1353                 if (u64temp == (u64)(unsigned long)nesqp) {
1354                         /* Zero the context value so cqe will be ignored */
1355                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1356                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1357                 }
1358
1359                 if (++cq_head >= nescq->hw_cq.cq_size)
1360                         cq_head = 0;
1361         }
1362
1363         spin_unlock_irqrestore(&nescq->lock, flags);
1364 }
1365
1366
1367 /**
1368  * nes_destroy_qp
1369  */
1370 static int nes_destroy_qp(struct ib_qp *ibqp)
1371 {
1372         struct nes_qp *nesqp = to_nesqp(ibqp);
1373         struct nes_ucontext *nes_ucontext;
1374         struct ib_qp_attr attr;
1375         struct iw_cm_id *cm_id;
1376         struct iw_cm_event cm_event;
1377         int ret = 0;
1378
1379         atomic_inc(&sw_qps_destroyed);
1380         nesqp->destroyed = 1;
1381
1382         /* Blow away the connection if it exists. */
1383         if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1384                 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1385                 attr.qp_state = IB_QPS_ERR;
1386                 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1387         }
1388
1389         if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1390                         (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1391                 cm_id = nesqp->cm_id;
1392                 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1393                 cm_event.status = -ETIMEDOUT;
1394                 cm_event.local_addr = cm_id->local_addr;
1395                 cm_event.remote_addr = cm_id->remote_addr;
1396                 cm_event.private_data = NULL;
1397                 cm_event.private_data_len = 0;
1398
1399                 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1400                                 "QP%u. cm_id = %p, refcount = %u. \n",
1401                                 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1402
1403                 cm_id->rem_ref(cm_id);
1404                 ret = cm_id->event_handler(cm_id, &cm_event);
1405                 if (ret)
1406                         nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1407         }
1408
1409         if (nesqp->user_mode) {
1410                 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1411                         nes_ucontext = to_nesucontext(ibqp->uobject->context);
1412                         clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1413                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1414                         if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1415                                 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1416                         }
1417                 }
1418                 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1419                         nesqp->sq_kmapped = 0;
1420                         kunmap(nesqp->page);
1421                 }
1422         } else {
1423                 /* Clean any pending completions from the cq(s) */
1424                 if (nesqp->nesscq)
1425                         nes_clean_cq(nesqp, nesqp->nesscq);
1426
1427                 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1428                         nes_clean_cq(nesqp, nesqp->nesrcq);
1429         }
1430         nes_rem_ref(&nesqp->ibqp);
1431         return 0;
1432 }
1433
1434
1435 /**
1436  * nes_create_cq
1437  */
1438 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1439                                    const struct ib_cq_init_attr *attr,
1440                                    struct ib_ucontext *context,
1441                                    struct ib_udata *udata)
1442 {
1443         int entries = attr->cqe;
1444         u64 u64temp;
1445         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1446         struct nes_device *nesdev = nesvnic->nesdev;
1447         struct nes_adapter *nesadapter = nesdev->nesadapter;
1448         struct nes_cq *nescq;
1449         struct nes_ucontext *nes_ucontext = NULL;
1450         struct nes_cqp_request *cqp_request;
1451         void *mem = NULL;
1452         struct nes_hw_cqp_wqe *cqp_wqe;
1453         struct nes_pbl *nespbl = NULL;
1454         struct nes_create_cq_req req;
1455         struct nes_create_cq_resp resp;
1456         u32 cq_num = 0;
1457         u32 opcode = 0;
1458         u32 pbl_entries = 1;
1459         int err;
1460         unsigned long flags;
1461         int ret;
1462
1463         if (attr->flags)
1464                 return ERR_PTR(-EINVAL);
1465
1466         if (entries > nesadapter->max_cqe)
1467                 return ERR_PTR(-EINVAL);
1468
1469         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1470                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1471         if (err) {
1472                 return ERR_PTR(err);
1473         }
1474
1475         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1476         if (!nescq) {
1477                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1478                 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1479                 return ERR_PTR(-ENOMEM);
1480         }
1481
1482         nescq->hw_cq.cq_size = max(entries + 1, 5);
1483         nescq->hw_cq.cq_number = cq_num;
1484         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1485
1486
1487         if (context) {
1488                 nes_ucontext = to_nesucontext(context);
1489                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1490                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1491                         kfree(nescq);
1492                         return ERR_PTR(-EFAULT);
1493                 }
1494                 nesvnic->mcrq_ucontext = nes_ucontext;
1495                 nes_ucontext->mcrqf = req.mcrqf;
1496                 if (nes_ucontext->mcrqf) {
1497                         if (nes_ucontext->mcrqf & 0x80000000)
1498                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1499                         else if (nes_ucontext->mcrqf & 0x40000000)
1500                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1501                         else
1502                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1503                         nescq->mcrqf = nes_ucontext->mcrqf;
1504                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1505                 }
1506                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1507                                 (unsigned long)req.user_cq_buffer, entries);
1508                 err = 1;
1509                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1510                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1511                                 list_del(&nespbl->list);
1512                                 err = 0;
1513                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1514                                                 nespbl);
1515                                 break;
1516                         }
1517                 }
1518                 if (err) {
1519                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1520                         kfree(nescq);
1521                         return ERR_PTR(-EFAULT);
1522                 }
1523
1524                 pbl_entries = nespbl->pbl_size >> 3;
1525                 nescq->cq_mem_size = 0;
1526         } else {
1527                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1528                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1529                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1530
1531                 /* allocate the physical buffer space */
1532                 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1533                                             &nescq->hw_cq.cq_pbase);
1534                 if (!mem) {
1535                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1536                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1537                         kfree(nescq);
1538                         return ERR_PTR(-ENOMEM);
1539                 }
1540
1541                 nescq->hw_cq.cq_vbase = mem;
1542                 nescq->hw_cq.cq_head = 0;
1543                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1544                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1545                                 (u32)nescq->hw_cq.cq_pbase);
1546         }
1547
1548         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1549         spin_lock_init(&nescq->lock);
1550
1551         /* send CreateCQ request to CQP */
1552         cqp_request = nes_get_cqp_request(nesdev);
1553         if (cqp_request == NULL) {
1554                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1555                 if (!context)
1556                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1557                                         nescq->hw_cq.cq_pbase);
1558                 else {
1559                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1560                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1561                         kfree(nespbl);
1562                 }
1563
1564                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1565                 kfree(nescq);
1566                 return ERR_PTR(-ENOMEM);
1567         }
1568         cqp_request->waiting = 1;
1569         cqp_wqe = &cqp_request->cqp_wqe;
1570
1571         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1572                         NES_CQP_CQ_CHK_OVERFLOW |
1573                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1574
1575         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1576
1577         if (pbl_entries != 1) {
1578                 if (pbl_entries > 32) {
1579                         /* use 4k pbl */
1580                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1581                         if (nesadapter->free_4kpbl == 0) {
1582                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1583                                 nes_free_cqp_request(nesdev, cqp_request);
1584                                 if (!context)
1585                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1586                                                         nescq->hw_cq.cq_pbase);
1587                                 else {
1588                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1589                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1590                                         kfree(nespbl);
1591                                 }
1592                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1593                                 kfree(nescq);
1594                                 return ERR_PTR(-ENOMEM);
1595                         } else {
1596                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1597                                 nescq->virtual_cq = 2;
1598                                 nesadapter->free_4kpbl--;
1599                         }
1600                 } else {
1601                         /* use 256 byte pbl */
1602                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1603                         if (nesadapter->free_256pbl == 0) {
1604                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1605                                 nes_free_cqp_request(nesdev, cqp_request);
1606                                 if (!context)
1607                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1608                                                         nescq->hw_cq.cq_pbase);
1609                                 else {
1610                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1611                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1612                                         kfree(nespbl);
1613                                 }
1614                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1615                                 kfree(nescq);
1616                                 return ERR_PTR(-ENOMEM);
1617                         } else {
1618                                 opcode |= NES_CQP_CQ_VIRT;
1619                                 nescq->virtual_cq = 1;
1620                                 nesadapter->free_256pbl--;
1621                         }
1622                 }
1623         }
1624
1625         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1626
1627         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1628         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1629         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1630                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1631
1632         if (context) {
1633                 if (pbl_entries != 1)
1634                         u64temp = (u64)nespbl->pbl_pbase;
1635                 else
1636                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1637                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1638                                 nes_ucontext->mmap_db_index[0]);
1639         } else {
1640                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1641                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1642         }
1643         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1644         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1645         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1646         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1647                         cpu_to_le32((u32)(u64temp >> 1));
1648         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1649                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1650
1651         atomic_set(&cqp_request->refcount, 2);
1652         nes_post_cqp_request(nesdev, cqp_request);
1653
1654         /* Wait for CQP */
1655         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1656                         nescq->hw_cq.cq_number);
1657         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1658                         NES_EVENT_TIMEOUT * 2);
1659         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1660                         nescq->hw_cq.cq_number, ret);
1661         if ((!ret) || (cqp_request->major_code)) {
1662                 nes_put_cqp_request(nesdev, cqp_request);
1663                 if (!context)
1664                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1665                                         nescq->hw_cq.cq_pbase);
1666                 else {
1667                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1668                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1669                         kfree(nespbl);
1670                 }
1671                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1672                 kfree(nescq);
1673                 return ERR_PTR(-EIO);
1674         }
1675         nes_put_cqp_request(nesdev, cqp_request);
1676
1677         if (context) {
1678                 /* free the nespbl */
1679                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1680                                 nespbl->pbl_pbase);
1681                 kfree(nespbl);
1682                 resp.cq_id = nescq->hw_cq.cq_number;
1683                 resp.cq_size = nescq->hw_cq.cq_size;
1684                 resp.mmap_db_index = 0;
1685                 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1686                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1687                         kfree(nescq);
1688                         return ERR_PTR(-EFAULT);
1689                 }
1690         }
1691
1692         return &nescq->ibcq;
1693 }
1694
1695
1696 /**
1697  * nes_destroy_cq
1698  */
1699 static int nes_destroy_cq(struct ib_cq *ib_cq)
1700 {
1701         struct nes_cq *nescq;
1702         struct nes_device *nesdev;
1703         struct nes_vnic *nesvnic;
1704         struct nes_adapter *nesadapter;
1705         struct nes_hw_cqp_wqe *cqp_wqe;
1706         struct nes_cqp_request *cqp_request;
1707         unsigned long flags;
1708         u32 opcode = 0;
1709         int ret;
1710
1711         if (ib_cq == NULL)
1712                 return 0;
1713
1714         nescq = to_nescq(ib_cq);
1715         nesvnic = to_nesvnic(ib_cq->device);
1716         nesdev = nesvnic->nesdev;
1717         nesadapter = nesdev->nesadapter;
1718
1719         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1720
1721         /* Send DestroyCQ request to CQP */
1722         cqp_request = nes_get_cqp_request(nesdev);
1723         if (cqp_request == NULL) {
1724                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1725                 return -ENOMEM;
1726         }
1727         cqp_request->waiting = 1;
1728         cqp_wqe = &cqp_request->cqp_wqe;
1729         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1730         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1731         if (nescq->virtual_cq == 1) {
1732                 nesadapter->free_256pbl++;
1733                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1734                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1735                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1736                 }
1737         } else if (nescq->virtual_cq == 2) {
1738                 nesadapter->free_4kpbl++;
1739                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1740                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1741                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1742                 }
1743                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1744         }
1745
1746         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1747
1748         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1749         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1750         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1751                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1752         if (!nescq->mcrqf)
1753                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1754
1755         atomic_set(&cqp_request->refcount, 2);
1756         nes_post_cqp_request(nesdev, cqp_request);
1757
1758         /* Wait for CQP */
1759         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1760                         nescq->hw_cq.cq_number);
1761         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1762                         NES_EVENT_TIMEOUT);
1763         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1764                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1765                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1766                         cqp_request->minor_code);
1767         if (!ret) {
1768                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1769                                         nescq->hw_cq.cq_number);
1770                 ret = -ETIME;
1771         } else if (cqp_request->major_code) {
1772                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1773                                         nescq->hw_cq.cq_number);
1774                 ret = -EIO;
1775         } else {
1776                 ret = 0;
1777         }
1778         nes_put_cqp_request(nesdev, cqp_request);
1779
1780         if (nescq->cq_mem_size)
1781                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1782                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1783         kfree(nescq);
1784
1785         return ret;
1786 }
1787
1788 /**
1789  * root_256
1790  */
1791 static u32 root_256(struct nes_device *nesdev,
1792                     struct nes_root_vpbl *root_vpbl,
1793                     struct nes_root_vpbl *new_root,
1794                     u16 pbl_count_4k)
1795 {
1796         u64 leaf_pbl;
1797         int i, j, k;
1798
1799         if (pbl_count_4k == 1) {
1800                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1801                                                 512, &new_root->pbl_pbase);
1802
1803                 if (new_root->pbl_vbase == NULL)
1804                         return 0;
1805
1806                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1807                 for (i = 0; i < 16; i++) {
1808                         new_root->pbl_vbase[i].pa_low =
1809                                 cpu_to_le32((u32)leaf_pbl);
1810                         new_root->pbl_vbase[i].pa_high =
1811                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1812                         leaf_pbl += 256;
1813                 }
1814         } else {
1815                 for (i = 3; i >= 0; i--) {
1816                         j = i * 16;
1817                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1818                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1819                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1820                                 << 32);
1821                         for (k = 1; k < 16; k++) {
1822                                 leaf_pbl += 256;
1823                                 root_vpbl->pbl_vbase[j + k].pa_low =
1824                                                 cpu_to_le32((u32)leaf_pbl);
1825                                 root_vpbl->pbl_vbase[j + k].pa_high =
1826                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1827                         }
1828                 }
1829         }
1830
1831         return 1;
1832 }
1833
1834
1835 /**
1836  * nes_reg_mr
1837  */
1838 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1839                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1840                 dma_addr_t single_buffer, u16 pbl_count_4k,
1841                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1842                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1843 {
1844         struct nes_hw_cqp_wqe *cqp_wqe;
1845         struct nes_cqp_request *cqp_request;
1846         unsigned long flags;
1847         int ret;
1848         struct nes_adapter *nesadapter = nesdev->nesadapter;
1849         uint pg_cnt = 0;
1850         u16 pbl_count_256 = 0;
1851         u16 pbl_count = 0;
1852         u8  use_256_pbls = 0;
1853         u8  use_4k_pbls = 0;
1854         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1855         struct nes_root_vpbl new_root = { 0, NULL, NULL };
1856         u32 opcode = 0;
1857         u16 major_code;
1858
1859         /* Register the region with the adapter */
1860         cqp_request = nes_get_cqp_request(nesdev);
1861         if (cqp_request == NULL) {
1862                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1863                 return -ENOMEM;
1864         }
1865         cqp_request->waiting = 1;
1866         cqp_wqe = &cqp_request->cqp_wqe;
1867
1868         if (pbl_count_4k) {
1869                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1870
1871                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1872                 pbl_count_256 = (pg_cnt + 31) / 32;
1873                 if (pg_cnt <= 32) {
1874                         if (pbl_count_256 <= nesadapter->free_256pbl)
1875                                 use_256_pbls = 1;
1876                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1877                                 use_4k_pbls = 1;
1878                 } else if (pg_cnt <= 2048) {
1879                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1880                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1881                                 use_4k_pbls = 1;
1882                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1883                                 use_256_pbls = 1;
1884                                 use_two_level = 1;
1885                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1886                                 use_4k_pbls = 1;
1887                         }
1888                 } else {
1889                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1890                                 use_4k_pbls = 1;
1891                 }
1892
1893                 if (use_256_pbls) {
1894                         pbl_count = pbl_count_256;
1895                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1896                 } else if (use_4k_pbls) {
1897                         pbl_count =  pbl_count_4k;
1898                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1899                 } else {
1900                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1901                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1902                         nes_free_cqp_request(nesdev, cqp_request);
1903                         return -ENOMEM;
1904                 }
1905
1906                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1907         }
1908
1909         if (use_256_pbls && use_two_level) {
1910                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1911                         if (new_root.pbl_pbase != 0)
1912                                 root_vpbl = &new_root;
1913                 } else {
1914                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1915                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1916                         use_256_pbls = 0;
1917
1918                         if (pbl_count_4k == 1)
1919                                 use_two_level = 0;
1920                         pbl_count = pbl_count_4k;
1921
1922                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1923                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1924                                 use_4k_pbls = 1;
1925                         }
1926                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1927
1928                         if (use_4k_pbls == 0)
1929                                 return -ENOMEM;
1930                 }
1931         }
1932
1933         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1934                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1935         if (acc & IB_ACCESS_LOCAL_WRITE)
1936                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1937         if (acc & IB_ACCESS_REMOTE_WRITE)
1938                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1939         if (acc & IB_ACCESS_REMOTE_READ)
1940                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1941         if (acc & IB_ACCESS_MW_BIND)
1942                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1943
1944         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1945         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1946         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1947         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1948
1949         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1950                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1951         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1952                         cpu_to_le32(nespd->pd_id & 0x00007fff);
1953         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1954
1955         if (pbl_count == 0) {
1956                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1957         } else {
1958                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1959                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1960                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1961
1962                 if (use_4k_pbls)
1963                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1964         }
1965         barrier();
1966
1967         atomic_set(&cqp_request->refcount, 2);
1968         nes_post_cqp_request(nesdev, cqp_request);
1969
1970         /* Wait for CQP */
1971         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1972                         NES_EVENT_TIMEOUT);
1973         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1974                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1975                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
1976         major_code = cqp_request->major_code;
1977         nes_put_cqp_request(nesdev, cqp_request);
1978
1979         if ((!ret || major_code) && pbl_count != 0) {
1980                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1981                 if (use_256_pbls)
1982                         nesadapter->free_256pbl += pbl_count + use_two_level;
1983                 else if (use_4k_pbls)
1984                         nesadapter->free_4kpbl += pbl_count + use_two_level;
1985                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1986         }
1987         if (new_root.pbl_pbase)
1988                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1989                                     new_root.pbl_pbase);
1990
1991         if (!ret)
1992                 return -ETIME;
1993         else if (major_code)
1994                 return -EIO;
1995
1996         *actual_pbl_cnt = pbl_count + use_two_level;
1997         *used_4k_pbls = use_4k_pbls;
1998         return 0;
1999 }
2000
2001
2002 /**
2003  * nes_reg_phys_mr
2004  */
2005 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
2006                 int acc, u64 *iova_start)
2007 {
2008         u64 region_length;
2009         struct nes_pd *nespd = to_nespd(ib_pd);
2010         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2011         struct nes_device *nesdev = nesvnic->nesdev;
2012         struct nes_adapter *nesadapter = nesdev->nesadapter;
2013         struct nes_mr *nesmr;
2014         struct ib_mr *ibmr;
2015         struct nes_vpbl vpbl;
2016         struct nes_root_vpbl root_vpbl;
2017         u32 stag;
2018         unsigned long mask;
2019         u32 stag_index = 0;
2020         u32 next_stag_index = 0;
2021         u32 driver_key = 0;
2022         int err = 0;
2023         int ret = 0;
2024         u16 pbl_count = 0;
2025         u8 single_page = 1;
2026         u8 stag_key = 0;
2027
2028         region_length = 0;
2029         vpbl.pbl_vbase = NULL;
2030         root_vpbl.pbl_vbase = NULL;
2031         root_vpbl.pbl_pbase = 0;
2032
2033         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2034         stag_key = (u8)next_stag_index;
2035
2036         driver_key = 0;
2037
2038         next_stag_index >>= 8;
2039         next_stag_index %= nesadapter->max_mr;
2040
2041         if ((addr ^ *iova_start) & ~PAGE_MASK)
2042                 return ERR_PTR(-EINVAL);
2043
2044         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2045                         &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2046         if (err) {
2047                 return ERR_PTR(err);
2048         }
2049
2050         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2051         if (!nesmr) {
2052                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2053                 return ERR_PTR(-ENOMEM);
2054         }
2055
2056         /* Allocate a 4K buffer for the PBL */
2057         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2058                         &vpbl.pbl_pbase);
2059         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2060                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2061         if (!vpbl.pbl_vbase) {
2062                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2063                 ibmr = ERR_PTR(-ENOMEM);
2064                 kfree(nesmr);
2065                 goto reg_phys_err;
2066         }
2067
2068
2069         mask = !size;
2070
2071         if (mask & ~PAGE_MASK) {
2072                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2073                 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2074                 ibmr = ERR_PTR(-EINVAL);
2075                 kfree(nesmr);
2076                 goto reg_phys_err;
2077         }
2078
2079         region_length += size;
2080         vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2081         vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2082
2083         stag = stag_index << 8;
2084         stag |= driver_key;
2085         stag += (u32)stag_key;
2086
2087         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2088                         " length = 0x%016lX, index = 0x%08X\n",
2089                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2090
2091         /* Make the leaf PBL the root if only one PBL */
2092         root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2093
2094         if (single_page) {
2095                 pbl_count = 0;
2096         } else {
2097                 pbl_count = 1;
2098         }
2099         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2100                         addr, pbl_count, 1, acc, iova_start,
2101                         &nesmr->pbls_used, &nesmr->pbl_4k);
2102
2103         if (ret == 0) {
2104                 nesmr->ibmr.rkey = stag;
2105                 nesmr->ibmr.lkey = stag;
2106                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2107                 ibmr = &nesmr->ibmr;
2108         } else {
2109                 kfree(nesmr);
2110                 ibmr = ERR_PTR(-ENOMEM);
2111         }
2112
2113 reg_phys_err:
2114         /* single PBL case */
2115         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2116         return ibmr;
2117 }
2118
2119
2120 /**
2121  * nes_get_dma_mr
2122  */
2123 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2124 {
2125         u64 kva = 0;
2126
2127         nes_debug(NES_DBG_MR, "\n");
2128
2129         return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2130 }
2131
2132 /**
2133  * nes_reg_user_mr
2134  */
2135 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2136                 u64 virt, int acc, struct ib_udata *udata)
2137 {
2138         u64 iova_start;
2139         __le64 *pbl;
2140         u64 region_length;
2141         dma_addr_t last_dma_addr = 0;
2142         dma_addr_t first_dma_addr = 0;
2143         struct nes_pd *nespd = to_nespd(pd);
2144         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2145         struct nes_device *nesdev = nesvnic->nesdev;
2146         struct nes_adapter *nesadapter = nesdev->nesadapter;
2147         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2148         struct scatterlist *sg;
2149         struct nes_ucontext *nes_ucontext;
2150         struct nes_pbl *nespbl;
2151         struct nes_mr *nesmr;
2152         struct ib_umem *region;
2153         struct nes_mem_reg_req req;
2154         struct nes_vpbl vpbl;
2155         struct nes_root_vpbl root_vpbl;
2156         int entry, page_index;
2157         int page_count = 0;
2158         int err, pbl_depth = 0;
2159         int chunk_pages;
2160         int ret;
2161         u32 stag;
2162         u32 stag_index = 0;
2163         u32 next_stag_index;
2164         u32 driver_key;
2165         u32 root_pbl_index = 0;
2166         u32 cur_pbl_index = 0;
2167         u32 skip_pages;
2168         u16 pbl_count;
2169         u8 single_page = 1;
2170         u8 stag_key;
2171         int first_page = 1;
2172
2173         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2174         if (IS_ERR(region)) {
2175                 return (struct ib_mr *)region;
2176         }
2177
2178         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2179                         " offset = %u, page size = %u.\n",
2180                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2181                         ib_umem_offset(region), region->page_size);
2182
2183         skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2184
2185         if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2186                 ib_umem_release(region);
2187                 return ERR_PTR(-EFAULT);
2188         }
2189         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2190
2191         switch (req.reg_type) {
2192                 case IWNES_MEMREG_TYPE_MEM:
2193                         pbl_depth = 0;
2194                         region_length = 0;
2195                         vpbl.pbl_vbase = NULL;
2196                         root_vpbl.pbl_vbase = NULL;
2197                         root_vpbl.pbl_pbase = 0;
2198
2199                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2200                         stag_key = (u8)next_stag_index;
2201
2202                         driver_key = next_stag_index & 0x70000000;
2203
2204                         next_stag_index >>= 8;
2205                         next_stag_index %= nesadapter->max_mr;
2206
2207                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2208                                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2209                         if (err) {
2210                                 ib_umem_release(region);
2211                                 return ERR_PTR(err);
2212                         }
2213
2214                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2215                         if (!nesmr) {
2216                                 ib_umem_release(region);
2217                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2218                                 return ERR_PTR(-ENOMEM);
2219                         }
2220                         nesmr->region = region;
2221
2222                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2223                                 if (sg_dma_address(sg) & ~PAGE_MASK) {
2224                                         ib_umem_release(region);
2225                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2226                                         nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2227                                                   (unsigned int) sg_dma_address(sg));
2228                                         ibmr = ERR_PTR(-EINVAL);
2229                                         kfree(nesmr);
2230                                         goto reg_user_mr_err;
2231                                 }
2232
2233                                 if (!sg_dma_len(sg)) {
2234                                         ib_umem_release(region);
2235                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2236                                                           stag_index);
2237                                         nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2238                                         ibmr = ERR_PTR(-EINVAL);
2239                                         kfree(nesmr);
2240                                         goto reg_user_mr_err;
2241                                 }
2242
2243                                 region_length += sg_dma_len(sg);
2244                                 chunk_pages = sg_dma_len(sg) >> 12;
2245                                 region_length -= skip_pages << 12;
2246                                 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2247                                         skip_pages = 0;
2248                                         if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2249                                                 goto enough_pages;
2250                                         if ((page_count&0x01FF) == 0) {
2251                                                 if (page_count >= 1024 * 512) {
2252                                                         ib_umem_release(region);
2253                                                         nes_free_resource(nesadapter,
2254                                                                           nesadapter->allocated_mrs, stag_index);
2255                                                         kfree(nesmr);
2256                                                         ibmr = ERR_PTR(-E2BIG);
2257                                                         goto reg_user_mr_err;
2258                                                 }
2259                                                 if (root_pbl_index == 1) {
2260                                                         root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2261                                                                         8192, &root_vpbl.pbl_pbase);
2262                                                         nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2263                                                                   root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2264                                                         if (!root_vpbl.pbl_vbase) {
2265                                                                 ib_umem_release(region);
2266                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2267                                                                                     vpbl.pbl_pbase);
2268                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2269                                                                                   stag_index);
2270                                                                 kfree(nesmr);
2271                                                                 ibmr = ERR_PTR(-ENOMEM);
2272                                                                 goto reg_user_mr_err;
2273                                                         }
2274                                                         root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2275                                                                         GFP_KERNEL);
2276                                                         if (!root_vpbl.leaf_vpbl) {
2277                                                                 ib_umem_release(region);
2278                                                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2279                                                                                     root_vpbl.pbl_pbase);
2280                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2281                                                                                     vpbl.pbl_pbase);
2282                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2283                                                                                   stag_index);
2284                                                                 kfree(nesmr);
2285                                                                 ibmr = ERR_PTR(-ENOMEM);
2286                                                                 goto reg_user_mr_err;
2287                                                         }
2288                                                         root_vpbl.pbl_vbase[0].pa_low =
2289                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2290                                                         root_vpbl.pbl_vbase[0].pa_high =
2291                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2292                                                         root_vpbl.leaf_vpbl[0] = vpbl;
2293                                                 }
2294                                                 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2295                                                                 &vpbl.pbl_pbase);
2296                                                 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2297                                                           vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2298                                                 if (!vpbl.pbl_vbase) {
2299                                                         ib_umem_release(region);
2300                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2301                                                         ibmr = ERR_PTR(-ENOMEM);
2302                                                         kfree(nesmr);
2303                                                         goto reg_user_mr_err;
2304                                                 }
2305                                                 if (1 <= root_pbl_index) {
2306                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2307                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2308                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2309                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2310                                                         root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2311                                                 }
2312                                                 root_pbl_index++;
2313                                                 cur_pbl_index = 0;
2314                                         }
2315                                         if (single_page) {
2316                                                 if (page_count != 0) {
2317                                                         if ((last_dma_addr+4096) !=
2318                                                                         (sg_dma_address(sg)+
2319                                                                         (page_index*4096)))
2320                                                                 single_page = 0;
2321                                                         last_dma_addr = sg_dma_address(sg)+
2322                                                                         (page_index*4096);
2323                                                 } else {
2324                                                         first_dma_addr = sg_dma_address(sg)+
2325                                                                         (page_index*4096);
2326                                                         last_dma_addr = first_dma_addr;
2327                                                 }
2328                                         }
2329
2330                                         vpbl.pbl_vbase[cur_pbl_index].pa_low =
2331                                                         cpu_to_le32((u32)(sg_dma_address(sg)+
2332                                                         (page_index*4096)));
2333                                         vpbl.pbl_vbase[cur_pbl_index].pa_high =
2334                                                         cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2335                                                         (page_index*4096))) >> 32)));
2336                                         cur_pbl_index++;
2337                                         page_count++;
2338                                 }
2339                         }
2340
2341                         enough_pages:
2342                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2343                                         " stag_key=0x%08x\n",
2344                                         stag_index, driver_key, stag_key);
2345                         stag = stag_index << 8;
2346                         stag |= driver_key;
2347                         stag += (u32)stag_key;
2348
2349                         iova_start = virt;
2350                         /* Make the leaf PBL the root if only one PBL */
2351                         if (root_pbl_index == 1) {
2352                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2353                         }
2354
2355                         if (single_page) {
2356                                 pbl_count = 0;
2357                         } else {
2358                                 pbl_count = root_pbl_index;
2359                                 first_dma_addr = 0;
2360                         }
2361                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2362                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2363                                         stag, (unsigned int)iova_start,
2364                                         (unsigned int)region_length, stag_index,
2365                                         (unsigned long long)region->length, pbl_count);
2366                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2367                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2368                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2369
2370                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2371
2372                         if (ret == 0) {
2373                                 nesmr->ibmr.rkey = stag;
2374                                 nesmr->ibmr.lkey = stag;
2375                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2376                                 ibmr = &nesmr->ibmr;
2377                         } else {
2378                                 ib_umem_release(region);
2379                                 kfree(nesmr);
2380                                 ibmr = ERR_PTR(-ENOMEM);
2381                         }
2382
2383                         reg_user_mr_err:
2384                         /* free the resources */
2385                         if (root_pbl_index == 1) {
2386                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2387                                                 vpbl.pbl_pbase);
2388                         } else {
2389                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2390                                         pci_free_consistent(nesdev->pcidev, 4096,
2391                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2392                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2393                                 }
2394                                 kfree(root_vpbl.leaf_vpbl);
2395                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2396                                                 root_vpbl.pbl_pbase);
2397                         }
2398
2399                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2400
2401                         return ibmr;
2402                 case IWNES_MEMREG_TYPE_QP:
2403                 case IWNES_MEMREG_TYPE_CQ:
2404                         if (!region->length) {
2405                                 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2406                                 ib_umem_release(region);
2407                                 return ERR_PTR(-EINVAL);
2408                         }
2409                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2410                         if (!nespbl) {
2411                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2412                                 ib_umem_release(region);
2413                                 return ERR_PTR(-ENOMEM);
2414                         }
2415                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2416                         if (!nesmr) {
2417                                 ib_umem_release(region);
2418                                 kfree(nespbl);
2419                                 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2420                                 return ERR_PTR(-ENOMEM);
2421                         }
2422                         nesmr->region = region;
2423                         nes_ucontext = to_nesucontext(pd->uobject->context);
2424                         pbl_depth = region->length >> 12;
2425                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2426                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2427                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2428                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2429                         } else {
2430                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2431                         }
2432
2433                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2434                                         nespbl->pbl_size, pbl_depth);
2435                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2436                                         &nespbl->pbl_pbase);
2437                         if (!pbl) {
2438                                 ib_umem_release(region);
2439                                 kfree(nesmr);
2440                                 kfree(nespbl);
2441                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2442                                 return ERR_PTR(-ENOMEM);
2443                         }
2444
2445                         nespbl->pbl_vbase = (u64 *)pbl;
2446                         nespbl->user_base = start;
2447                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2448                                         " pbl_vbase=%p user_base=0x%lx\n",
2449                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2450                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2451
2452                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2453                                 chunk_pages = sg_dma_len(sg) >> 12;
2454                                 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2455                                 if (first_page) {
2456                                         nespbl->page = sg_page(sg);
2457                                         first_page = 0;
2458                                 }
2459
2460                                 for (page_index = 0; page_index < chunk_pages; page_index++) {
2461                                         ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2462                                                         (sg_dma_address(sg)+
2463                                                         (page_index*4096)));
2464                                         ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2465                                                         (sg_dma_address(sg)+
2466                                                         (page_index*4096)))>>32);
2467                                         nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2468                                                   (unsigned long long)*pbl,
2469                                                   le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2470                                         pbl++;
2471                                 }
2472                         }
2473
2474                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2475                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2476                         } else {
2477                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2478                         }
2479                         nesmr->ibmr.rkey = -1;
2480                         nesmr->ibmr.lkey = -1;
2481                         nesmr->mode = req.reg_type;
2482                         return &nesmr->ibmr;
2483         }
2484
2485         ib_umem_release(region);
2486         return ERR_PTR(-ENOSYS);
2487 }
2488
2489
2490 /**
2491  * nes_dereg_mr
2492  */
2493 static int nes_dereg_mr(struct ib_mr *ib_mr)
2494 {
2495         struct nes_mr *nesmr = to_nesmr(ib_mr);
2496         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2497         struct nes_device *nesdev = nesvnic->nesdev;
2498         struct nes_adapter *nesadapter = nesdev->nesadapter;
2499         struct nes_hw_cqp_wqe *cqp_wqe;
2500         struct nes_cqp_request *cqp_request;
2501         unsigned long flags;
2502         int ret;
2503         u16 major_code;
2504         u16 minor_code;
2505
2506
2507         if (nesmr->pages)
2508                 pci_free_consistent(nesdev->pcidev,
2509                                     nesmr->max_pages * sizeof(u64),
2510                                     nesmr->pages,
2511                                     nesmr->paddr);
2512
2513         if (nesmr->region) {
2514                 ib_umem_release(nesmr->region);
2515         }
2516         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2517                 kfree(nesmr);
2518                 return 0;
2519         }
2520
2521         /* Deallocate the region with the adapter */
2522
2523         cqp_request = nes_get_cqp_request(nesdev);
2524         if (cqp_request == NULL) {
2525                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2526                 return -ENOMEM;
2527         }
2528         cqp_request->waiting = 1;
2529         cqp_wqe = &cqp_request->cqp_wqe;
2530
2531         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2532         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2533                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2534                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2535         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2536
2537         atomic_set(&cqp_request->refcount, 2);
2538         nes_post_cqp_request(nesdev, cqp_request);
2539
2540         /* Wait for CQP */
2541         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2542         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2543                         NES_EVENT_TIMEOUT);
2544         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2545                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2546                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2547
2548         major_code = cqp_request->major_code;
2549         minor_code = cqp_request->minor_code;
2550
2551         nes_put_cqp_request(nesdev, cqp_request);
2552
2553         if (!ret) {
2554                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2555                                 " ib_mr=%p, rkey = 0x%08X\n",
2556                                 ib_mr, ib_mr->rkey);
2557                 return -ETIME;
2558         } else if (major_code) {
2559                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2560                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2561                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2562                 return -EIO;
2563         }
2564
2565         if (nesmr->pbls_used != 0) {
2566                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2567                 if (nesmr->pbl_4k) {
2568                         nesadapter->free_4kpbl += nesmr->pbls_used;
2569                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2570                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2571                                         "exceeded the max(%u)\n",
2572                                         nesadapter->free_4kpbl,
2573                                         nesadapter->max_4kpbl);
2574                 } else {
2575                         nesadapter->free_256pbl += nesmr->pbls_used;
2576                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2577                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2578                                         "exceeded the max(%u)\n",
2579                                         nesadapter->free_256pbl,
2580                                         nesadapter->max_256pbl);
2581                 }
2582                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2583         }
2584         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2585                         (ib_mr->rkey & 0x0fffff00) >> 8);
2586
2587         kfree(nesmr);
2588
2589         return 0;
2590 }
2591
2592
2593 /**
2594  * show_rev
2595  */
2596 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2597                         char *buf)
2598 {
2599         struct nes_ib_device *nesibdev =
2600                         container_of(dev, struct nes_ib_device, ibdev.dev);
2601         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2602
2603         nes_debug(NES_DBG_INIT, "\n");
2604         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2605 }
2606
2607
2608 /**
2609  * show_hca
2610  */
2611 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2612                         char *buf)
2613 {
2614         nes_debug(NES_DBG_INIT, "\n");
2615         return sprintf(buf, "NES020\n");
2616 }
2617
2618
2619 /**
2620  * show_board
2621  */
2622 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2623                           char *buf)
2624 {
2625         nes_debug(NES_DBG_INIT, "\n");
2626         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2627 }
2628
2629
2630 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2631 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2632 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2633
2634 static struct device_attribute *nes_dev_attributes[] = {
2635         &dev_attr_hw_rev,
2636         &dev_attr_hca_type,
2637         &dev_attr_board_id
2638 };
2639
2640
2641 /**
2642  * nes_query_qp
2643  */
2644 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2645                 int attr_mask, struct ib_qp_init_attr *init_attr)
2646 {
2647         struct nes_qp *nesqp = to_nesqp(ibqp);
2648
2649         nes_debug(NES_DBG_QP, "\n");
2650
2651         attr->qp_access_flags = 0;
2652         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2653         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2654         attr->cap.max_recv_sge = 1;
2655         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2656                 attr->cap.max_inline_data = 0;
2657         else
2658                 attr->cap.max_inline_data = 64;
2659
2660         init_attr->event_handler = nesqp->ibqp.event_handler;
2661         init_attr->qp_context = nesqp->ibqp.qp_context;
2662         init_attr->send_cq = nesqp->ibqp.send_cq;
2663         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2664         init_attr->srq = nesqp->ibqp.srq;
2665         init_attr->cap = attr->cap;
2666
2667         return 0;
2668 }
2669
2670
2671 /**
2672  * nes_hw_modify_qp
2673  */
2674 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2675                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2676 {
2677         struct nes_hw_cqp_wqe *cqp_wqe;
2678         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2679         /* struct iw_cm_event cm_event; */
2680         struct nes_cqp_request *cqp_request;
2681         int ret;
2682         u16 major_code;
2683
2684         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2685                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2686
2687         cqp_request = nes_get_cqp_request(nesdev);
2688         if (cqp_request == NULL) {
2689                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2690                 return -ENOMEM;
2691         }
2692         if (wait_completion) {
2693                 cqp_request->waiting = 1;
2694         } else {
2695                 cqp_request->waiting = 0;
2696         }
2697         cqp_wqe = &cqp_request->cqp_wqe;
2698
2699         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2700                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2701         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2702                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2703         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2704         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2705         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2706
2707         /* If sending a terminate message, fill in the length (in words) */
2708         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2709             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2710                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2711                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2712         }
2713
2714         atomic_set(&cqp_request->refcount, 2);
2715         nes_post_cqp_request(nesdev, cqp_request);
2716
2717         /* Wait for CQP */
2718         if (wait_completion) {
2719                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2720                                 nesqp->hwqp.qp_id); */
2721                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2722                                 NES_EVENT_TIMEOUT);
2723                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2724                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2725                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2726                 major_code = cqp_request->major_code;
2727                 if (major_code) {
2728                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2729                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2730                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2731                                         cqp_request->minor_code, next_iwarp_state);
2732                 }
2733
2734                 nes_put_cqp_request(nesdev, cqp_request);
2735
2736                 if (!ret)
2737                         return -ETIME;
2738                 else if (major_code)
2739                         return -EIO;
2740                 else
2741                         return 0;
2742         } else {
2743                 return 0;
2744         }
2745 }
2746
2747
2748 /**
2749  * nes_modify_qp
2750  */
2751 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2752                 int attr_mask, struct ib_udata *udata)
2753 {
2754         struct nes_qp *nesqp = to_nesqp(ibqp);
2755         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2756         struct nes_device *nesdev = nesvnic->nesdev;
2757         /* u32 cqp_head; */
2758         /* u32 counter; */
2759         u32 next_iwarp_state = 0;
2760         int err;
2761         unsigned long qplockflags;
2762         int ret;
2763         u16 original_last_aeq;
2764         u8 issue_modify_qp = 0;
2765         u8 dont_wait = 0;
2766
2767         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2768                         " iwarp_state=0x%X, refcount=%d\n",
2769                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2770                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2771
2772         spin_lock_irqsave(&nesqp->lock, qplockflags);
2773
2774         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2775                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2776                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2777                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2778
2779         if (attr_mask & IB_QP_STATE) {
2780                 switch (attr->qp_state) {
2781                         case IB_QPS_INIT:
2782                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2783                                                 nesqp->hwqp.qp_id);
2784                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2785                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2786                                         return -EINVAL;
2787                                 }
2788                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2789                                 issue_modify_qp = 1;
2790                                 break;
2791                         case IB_QPS_RTR:
2792                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2793                                                 nesqp->hwqp.qp_id);
2794                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2795                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2796                                         return -EINVAL;
2797                                 }
2798                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2799                                 issue_modify_qp = 1;
2800                                 break;
2801                         case IB_QPS_RTS:
2802                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2803                                                 nesqp->hwqp.qp_id);
2804                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2805                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2806                                         return -EINVAL;
2807                                 }
2808                                 if (nesqp->cm_id == NULL) {
2809                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2810                                                         nesqp->hwqp.qp_id );
2811                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2812                                         return -EINVAL;
2813                                 }
2814                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2815                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2816                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2817                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2818                                 issue_modify_qp = 1;
2819                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2820                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2821                                 nesqp->hte_added = 1;
2822                                 break;
2823                         case IB_QPS_SQD:
2824                                 issue_modify_qp = 1;
2825                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2826                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2827                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2828                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2829                                         return 0;
2830                                 } else {
2831                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2832                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2833                                                                 " ignored due to current iWARP state\n",
2834                                                                 nesqp->hwqp.qp_id);
2835                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2836                                                 return -EINVAL;
2837                                         }
2838                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2839                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2840                                                                 " already done based on hw state.\n",
2841                                                                 nesqp->hwqp.qp_id);
2842                                                 issue_modify_qp = 0;
2843                                         }
2844                                         switch (nesqp->hw_iwarp_state) {
2845                                                 case NES_AEQE_IWARP_STATE_CLOSING:
2846                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2847                                                         break;
2848                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
2849                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2850                                                         break;
2851                                                 case NES_AEQE_IWARP_STATE_ERROR:
2852                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2853                                                         break;
2854                                                 default:
2855                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2856                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2857                                                         break;
2858                                         }
2859                                 }
2860                                 break;
2861                         case IB_QPS_SQE:
2862                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2863                                                 nesqp->hwqp.qp_id);
2864                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2865                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2866                                         return -EINVAL;
2867                                 }
2868                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2869                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2870                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2871                                 issue_modify_qp = 1;
2872                                 break;
2873                         case IB_QPS_ERR:
2874                         case IB_QPS_RESET:
2875                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2876                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2877                                         return -EINVAL;
2878                                 }
2879                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2880                                                 nesqp->hwqp.qp_id);
2881                                 if (nesqp->term_flags)
2882                                         del_timer(&nesqp->terminate_timer);
2883
2884                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2885                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2886                                         if (nesqp->hte_added) {
2887                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2888                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2889                                                 nesqp->hte_added = 0;
2890                                         }
2891                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2892                                                 (nesdev->iw_status) &&
2893                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2894                                         next_iwarp_state |= NES_CQP_QP_RESET;
2895                                 } else {
2896                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2897                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2898                                         dont_wait = 1;
2899                                 }
2900                                 issue_modify_qp = 1;
2901                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2902                                 break;
2903                         default:
2904                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2905                                 return -EINVAL;
2906                                 break;
2907                 }
2908
2909                 nesqp->ibqp_state = attr->qp_state;
2910                 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2911                 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2912                                 nesqp->iwarp_state);
2913         }
2914
2915         if (attr_mask & IB_QP_ACCESS_FLAGS) {
2916                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2917                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2918                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
2919                         issue_modify_qp = 1;
2920                 }
2921                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2922                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2923                         issue_modify_qp = 1;
2924                 }
2925                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2926                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2927                         issue_modify_qp = 1;
2928                 }
2929                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2930                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2931                         issue_modify_qp = 1;
2932                 }
2933
2934                 if (nesqp->user_mode) {
2935                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2936                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
2937                         issue_modify_qp = 1;
2938                 }
2939         }
2940
2941         original_last_aeq = nesqp->last_aeq;
2942         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2943
2944         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2945
2946         ret = 0;
2947
2948
2949         if (issue_modify_qp) {
2950                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2951                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2952                 if (ret)
2953                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2954                                         " failed for QP%u.\n",
2955                                         next_iwarp_state, nesqp->hwqp.qp_id);
2956
2957         }
2958
2959         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2960                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2961                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2962                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2963                                 original_last_aeq, nesqp->last_aeq);
2964                 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2965                         if (dont_wait) {
2966                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2967                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2968                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2969                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2970                                                         original_last_aeq, nesqp->last_aeq);
2971                                         /* this one is for the cm_disconnect thread */
2972                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
2973                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2974                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2975                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2976                                         nes_cm_disconn(nesqp);
2977                                 } else {
2978                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2979                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2980                                 }
2981                         } else {
2982                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
2983                                 if (nesqp->cm_id) {
2984                                         /* These two are for the timer thread */
2985                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
2986                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
2987                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2988                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
2989                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
2990                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2991                                                                 original_last_aeq, nesqp->last_aeq);
2992                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
2993                                         }
2994                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2995                                 } else {
2996                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2997                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2998                                                         " need ae to finish up, original_last_aeq = 0x%04X."
2999                                                         " last_aeq = 0x%04X.\n",
3000                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3001                                                         original_last_aeq, nesqp->last_aeq);
3002                                 }
3003                         }
3004                 } else {
3005                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3006                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3007                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3008                                         original_last_aeq, nesqp->last_aeq);
3009                 }
3010         } else {
3011                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3012                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3013                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3014                                 original_last_aeq, nesqp->last_aeq);
3015         }
3016
3017         err = 0;
3018
3019         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3020                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3021
3022         return err;
3023 }
3024
3025
3026 /**
3027  * nes_muticast_attach
3028  */
3029 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3030 {
3031         nes_debug(NES_DBG_INIT, "\n");
3032         return -ENOSYS;
3033 }
3034
3035
3036 /**
3037  * nes_multicast_detach
3038  */
3039 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3040 {
3041         nes_debug(NES_DBG_INIT, "\n");
3042         return -ENOSYS;
3043 }
3044
3045
3046 /**
3047  * nes_process_mad
3048  */
3049 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3050                 u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
3051                 const struct ib_mad_hdr *in, size_t in_mad_size,
3052                 struct ib_mad_hdr *out, size_t *out_mad_size,
3053                 u16 *out_mad_pkey_index)
3054 {
3055         nes_debug(NES_DBG_INIT, "\n");
3056         return -ENOSYS;
3057 }
3058
3059 static inline void
3060 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3061 {
3062         int sge_index;
3063         int total_payload_length = 0;
3064         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3065                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3066                         ib_wr->sg_list[sge_index].addr);
3067                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3068                         ib_wr->sg_list[sge_index].length);
3069                 if (uselkey)
3070                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3071                                                 (ib_wr->sg_list[sge_index].lkey));
3072                 else
3073                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3074
3075                 total_payload_length += ib_wr->sg_list[sge_index].length;
3076         }
3077         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3078                         total_payload_length);
3079         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3080                                 total_payload_length);
3081 }
3082
3083 /**
3084  * nes_post_send
3085  */
3086 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3087                 struct ib_send_wr **bad_wr)
3088 {
3089         u64 u64temp;
3090         unsigned long flags = 0;
3091         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3092         struct nes_device *nesdev = nesvnic->nesdev;
3093         struct nes_qp *nesqp = to_nesqp(ibqp);
3094         struct nes_hw_qp_wqe *wqe;
3095         int err = 0;
3096         u32 qsize = nesqp->hwqp.sq_size;
3097         u32 head;
3098         u32 wqe_misc = 0;
3099         u32 wqe_count = 0;
3100         u32 counter;
3101
3102         if (nesqp->ibqp_state > IB_QPS_RTS) {
3103                 err = -EINVAL;
3104                 goto out;
3105         }
3106
3107         spin_lock_irqsave(&nesqp->lock, flags);
3108
3109         head = nesqp->hwqp.sq_head;
3110
3111         while (ib_wr) {
3112                 /* Check for QP error */
3113                 if (nesqp->term_flags) {
3114                         err = -EINVAL;
3115                         break;
3116                 }
3117
3118                 /* Check for SQ overflow */
3119                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3120                         err = -ENOMEM;
3121                         break;
3122                 }
3123
3124                 wqe = &nesqp->hwqp.sq_vbase[head];
3125                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3126                                 nesqp->hwqp.qp_id, wqe, head); */
3127                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3128                 u64temp = (u64)(ib_wr->wr_id);
3129                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3130                                         u64temp);
3131                 switch (ib_wr->opcode) {
3132                 case IB_WR_SEND:
3133                 case IB_WR_SEND_WITH_INV:
3134                         if (IB_WR_SEND == ib_wr->opcode) {
3135                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3136                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3137                                 else
3138                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3139                         } else {
3140                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3141                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3142                                 else
3143                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3144
3145                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3146                                                     ib_wr->ex.invalidate_rkey);
3147                         }
3148
3149                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3150                                 err = -EINVAL;
3151                                 break;
3152                         }
3153
3154                         if (ib_wr->send_flags & IB_SEND_FENCE)
3155                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3156
3157                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3158                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3159                              (ib_wr->sg_list[0].length <= 64)) {
3160                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3161                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3162                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3163                                                     ib_wr->sg_list[0].length);
3164                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3165                         } else {
3166                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3167                         }
3168
3169                         break;
3170                 case IB_WR_RDMA_WRITE:
3171                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3172                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3173                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3174                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3175                                 err = -EINVAL;
3176                                 break;
3177                         }
3178
3179                         if (ib_wr->send_flags & IB_SEND_FENCE)
3180                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3181
3182                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3183                                             rdma_wr(ib_wr)->rkey);
3184                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3185                                             rdma_wr(ib_wr)->remote_addr);
3186
3187                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3188                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3189                              (ib_wr->sg_list[0].length <= 64)) {
3190                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3191                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3192                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3193                                                     ib_wr->sg_list[0].length);
3194                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3195                         } else {
3196                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3197                         }
3198
3199                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3200                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3201                         break;
3202                 case IB_WR_RDMA_READ:
3203                 case IB_WR_RDMA_READ_WITH_INV:
3204                         /* iWARP only supports 1 sge for RDMA reads */
3205                         if (ib_wr->num_sge > 1) {
3206                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3207                                           ib_wr->num_sge);
3208                                 err = -EINVAL;
3209                                 break;
3210                         }
3211                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3212                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3213                         } else {
3214                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3215                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3216                                                     ib_wr->ex.invalidate_rkey);
3217                         }
3218
3219                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3220                                             rdma_wr(ib_wr)->remote_addr);
3221                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3222                                             rdma_wr(ib_wr)->rkey);
3223                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3224                                             ib_wr->sg_list->length);
3225                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3226                                             ib_wr->sg_list->addr);
3227                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3228                                             ib_wr->sg_list->lkey);
3229                         break;
3230                 case IB_WR_LOCAL_INV:
3231                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3232                         set_wqe_32bit_value(wqe->wqe_words,
3233                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3234                                             ib_wr->ex.invalidate_rkey);
3235                         break;
3236                 case IB_WR_REG_MR:
3237                 {
3238                         struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3239                         int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3240                         int flags = reg_wr(ib_wr)->access;
3241
3242                         if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3243                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3244                                 err = -EINVAL;
3245                                 break;
3246                         }
3247                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3248                         set_wqe_64bit_value(wqe->wqe_words,
3249                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3250                                             mr->ibmr.iova);
3251                         set_wqe_32bit_value(wqe->wqe_words,
3252                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3253                                             mr->ibmr.length);
3254                         set_wqe_32bit_value(wqe->wqe_words,
3255                                             NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3256                         set_wqe_32bit_value(wqe->wqe_words,
3257                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3258                                             reg_wr(ib_wr)->key);
3259
3260                         if (page_shift == 12) {
3261                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3262                         } else if (page_shift == 21) {
3263                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3264                         } else {
3265                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3266                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3267                                 err = -EINVAL;
3268                                 break;
3269                         }
3270
3271                         /* Set access_flags */
3272                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3273                         if (flags & IB_ACCESS_LOCAL_WRITE)
3274                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3275
3276                         if (flags & IB_ACCESS_REMOTE_WRITE)
3277                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3278
3279                         if (flags & IB_ACCESS_REMOTE_READ)
3280                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3281
3282                         if (flags & IB_ACCESS_MW_BIND)
3283                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3284
3285                         /* Fill in PBL info: */
3286                         set_wqe_64bit_value(wqe->wqe_words,
3287                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3288                                             mr->paddr);
3289
3290                         set_wqe_32bit_value(wqe->wqe_words,
3291                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3292                                             mr->npages * 8);
3293
3294                         nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3295                                   "length: %d, rkey: %0x, pgl_paddr: %llx, "
3296                                   "page_list_len: %u, wqe_misc: %x\n",
3297                                   (unsigned long long) mr->ibmr.iova,
3298                                   mr->ibmr.length,
3299                                   reg_wr(ib_wr)->key,
3300                                   (unsigned long long) mr->paddr,
3301                                   mr->npages,
3302                                   wqe_misc);
3303                         break;
3304                 }
3305                 default:
3306                         /* error */
3307                         err = -EINVAL;
3308                         break;
3309                 }
3310
3311                 if (err)
3312                         break;
3313
3314                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3315                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3316
3317                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3318
3319                 ib_wr = ib_wr->next;
3320                 head++;
3321                 wqe_count++;
3322                 if (head >= qsize)
3323                         head = 0;
3324
3325         }
3326
3327         nesqp->hwqp.sq_head = head;
3328         barrier();
3329         while (wqe_count) {
3330                 counter = min(wqe_count, ((u32)255));
3331                 wqe_count -= counter;
3332                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3333                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3334         }
3335
3336         spin_unlock_irqrestore(&nesqp->lock, flags);
3337
3338 out:
3339         if (err)
3340                 *bad_wr = ib_wr;
3341         return err;
3342 }
3343
3344
3345 /**
3346  * nes_post_recv
3347  */
3348 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3349                 struct ib_recv_wr **bad_wr)
3350 {
3351         u64 u64temp;
3352         unsigned long flags = 0;
3353         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3354         struct nes_device *nesdev = nesvnic->nesdev;
3355         struct nes_qp *nesqp = to_nesqp(ibqp);
3356         struct nes_hw_qp_wqe *wqe;
3357         int err = 0;
3358         int sge_index;
3359         u32 qsize = nesqp->hwqp.rq_size;
3360         u32 head;
3361         u32 wqe_count = 0;
3362         u32 counter;
3363         u32 total_payload_length;
3364
3365         if (nesqp->ibqp_state > IB_QPS_RTS) {
3366                 err = -EINVAL;
3367                 goto out;
3368         }
3369
3370         spin_lock_irqsave(&nesqp->lock, flags);
3371
3372         head = nesqp->hwqp.rq_head;
3373
3374         while (ib_wr) {
3375                 /* Check for QP error */
3376                 if (nesqp->term_flags) {
3377                         err = -EINVAL;
3378                         break;
3379                 }
3380
3381                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3382                         err = -EINVAL;
3383                         break;
3384                 }
3385                 /* Check for RQ overflow */
3386                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3387                         err = -ENOMEM;
3388                         break;
3389                 }
3390
3391                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3392                 wqe = &nesqp->hwqp.rq_vbase[head];
3393
3394                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3395                                 nesqp->hwqp.qp_id, wqe, head); */
3396                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3397                 u64temp = (u64)(ib_wr->wr_id);
3398                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3399                                         u64temp);
3400                 total_payload_length = 0;
3401                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3402                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3403                                         ib_wr->sg_list[sge_index].addr);
3404                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3405                                         ib_wr->sg_list[sge_index].length);
3406                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3407                                         ib_wr->sg_list[sge_index].lkey);
3408
3409                         total_payload_length += ib_wr->sg_list[sge_index].length;
3410                 }
3411                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3412                                         total_payload_length);
3413
3414                 ib_wr = ib_wr->next;
3415                 head++;
3416                 wqe_count++;
3417                 if (head >= qsize)
3418                         head = 0;
3419         }
3420
3421         nesqp->hwqp.rq_head = head;
3422         barrier();
3423         while (wqe_count) {
3424                 counter = min(wqe_count, ((u32)255));
3425                 wqe_count -= counter;
3426                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3427         }
3428
3429         spin_unlock_irqrestore(&nesqp->lock, flags);
3430
3431 out:
3432         if (err)
3433                 *bad_wr = ib_wr;
3434         return err;
3435 }
3436
3437 /**
3438  * nes_drain_sq - drain sq
3439  * @ibqp: pointer to ibqp
3440  */
3441 static void nes_drain_sq(struct ib_qp *ibqp)
3442 {
3443         struct nes_qp *nesqp = to_nesqp(ibqp);
3444
3445         if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
3446                 wait_for_completion(&nesqp->sq_drained);
3447 }
3448
3449 /**
3450  * nes_drain_rq - drain rq
3451  * @ibqp: pointer to ibqp
3452  */
3453 static void nes_drain_rq(struct ib_qp *ibqp)
3454 {
3455         struct nes_qp *nesqp = to_nesqp(ibqp);
3456
3457         if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
3458                 wait_for_completion(&nesqp->rq_drained);
3459 }
3460
3461 /**
3462  * nes_poll_cq
3463  */
3464 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3465 {
3466         u64 u64temp;
3467         u64 wrid;
3468         unsigned long flags = 0;
3469         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3470         struct nes_device *nesdev = nesvnic->nesdev;
3471         struct nes_cq *nescq = to_nescq(ibcq);
3472         struct nes_qp *nesqp;
3473         struct nes_hw_cqe cqe;
3474         u32 head;
3475         u32 wq_tail = 0;
3476         u32 cq_size;
3477         u32 cqe_count = 0;
3478         u32 wqe_index;
3479         u32 u32temp;
3480         u32 move_cq_head = 1;
3481         u32 err_code;
3482
3483         nes_debug(NES_DBG_CQ, "\n");
3484
3485         spin_lock_irqsave(&nescq->lock, flags);
3486
3487         head = nescq->hw_cq.cq_head;
3488         cq_size = nescq->hw_cq.cq_size;
3489
3490         while (cqe_count < num_entries) {
3491                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3492                                 NES_CQE_VALID) == 0)
3493                         break;
3494
3495                 /*
3496                  * Make sure we read CQ entry contents *after*
3497                  * we've checked the valid bit.
3498                  */
3499                 rmb();
3500
3501                 cqe = nescq->hw_cq.cq_vbase[head];
3502                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3503                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3504                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3505                 /* parse CQE, get completion context from WQE (either rq or sq) */
3506                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3507                                 ((u64)u32temp);
3508
3509                 if (u64temp) {
3510                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3511                         memset(entry, 0, sizeof *entry);
3512                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3513                                 entry->status = IB_WC_SUCCESS;
3514                         } else {
3515                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3516                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3517                                         entry->status = err_code & 0x0000ffff;
3518
3519                                         /* The rest of the cqe's will be marked as flushed */
3520                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3521                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3522                                                             NES_IWARP_CQE_MINOR_FLUSH);
3523                                 } else
3524                                         entry->status = IB_WC_WR_FLUSH_ERR;
3525                         }
3526
3527                         entry->qp = &nesqp->ibqp;
3528                         entry->src_qp = nesqp->hwqp.qp_id;
3529
3530                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3531                                 if (nesqp->skip_lsmm) {
3532                                         nesqp->skip_lsmm = 0;
3533                                         nesqp->hwqp.sq_tail++;
3534                                 }
3535
3536                                 /* Working on a SQ Completion*/
3537                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3538                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3539                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3540                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3541                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3542                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3543
3544                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3545                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3546                                         case NES_IWARP_SQ_OP_RDMAW:
3547                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3548                                                 entry->opcode = IB_WC_RDMA_WRITE;
3549                                                 break;
3550                                         case NES_IWARP_SQ_OP_RDMAR:
3551                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3552                                                 entry->opcode = IB_WC_RDMA_READ;
3553                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3554                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3555                                                 break;
3556                                         case NES_IWARP_SQ_OP_SENDINV:
3557                                         case NES_IWARP_SQ_OP_SENDSEINV:
3558                                         case NES_IWARP_SQ_OP_SEND:
3559                                         case NES_IWARP_SQ_OP_SENDSE:
3560                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3561                                                 entry->opcode = IB_WC_SEND;
3562                                                 break;
3563                                         case NES_IWARP_SQ_OP_LOCINV:
3564                                                 entry->opcode = IB_WC_LOCAL_INV;
3565                                                 break;
3566                                         case NES_IWARP_SQ_OP_FAST_REG:
3567                                                 entry->opcode = IB_WC_REG_MR;
3568                                                 break;
3569                                 }
3570
3571                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3572                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3573                                         move_cq_head = 0;
3574                                         wq_tail = nesqp->hwqp.sq_tail;
3575                                 }
3576                         } else {
3577                                 /* Working on a RQ Completion*/
3578                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3579                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3580                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3581                                         entry->opcode = IB_WC_RECV;
3582
3583                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3584                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3585                                         move_cq_head = 0;
3586                                         wq_tail = nesqp->hwqp.rq_tail;
3587                                 }
3588                         }
3589
3590                         if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
3591                                 if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
3592                                         complete(&nesqp->sq_drained);
3593                                 if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
3594                                         complete(&nesqp->rq_drained);
3595                         }
3596
3597                         entry->wr_id = wrid;
3598                         entry++;
3599                         cqe_count++;
3600                 }
3601
3602                 if (move_cq_head) {
3603                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3604                         if (++head >= cq_size)
3605                                 head = 0;
3606                         nescq->polled_completions++;
3607
3608                         if ((nescq->polled_completions > (cq_size / 2)) ||
3609                                         (nescq->polled_completions == 255)) {
3610                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3611                                         " are pending %u of %u.\n",
3612                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3613                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3614                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3615                                 nescq->polled_completions = 0;
3616                         }
3617                 } else {
3618                         /* Update the wqe index and set status to flush */
3619                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3620                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3621                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3622                                 cpu_to_le32(wqe_index);
3623                         move_cq_head = 1; /* ready for next pass */
3624                 }
3625         }
3626
3627         if (nescq->polled_completions) {
3628                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3629                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3630                 nescq->polled_completions = 0;
3631         }
3632
3633         nescq->hw_cq.cq_head = head;
3634         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3635                         cqe_count, nescq->hw_cq.cq_number);
3636
3637         spin_unlock_irqrestore(&nescq->lock, flags);
3638
3639         return cqe_count;
3640 }
3641
3642
3643 /**
3644  * nes_req_notify_cq
3645  */
3646 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3647                 {
3648         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3649         struct nes_device *nesdev = nesvnic->nesdev;
3650         struct nes_cq *nescq = to_nescq(ibcq);
3651         u32 cq_arm;
3652
3653         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3654                         nescq->hw_cq.cq_number);
3655
3656         cq_arm = nescq->hw_cq.cq_number;
3657         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3658                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3659         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3660                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3661         else
3662                 return -EINVAL;
3663
3664         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3665         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3666
3667         return 0;
3668 }
3669
3670 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3671                               struct ib_port_immutable *immutable)
3672 {
3673         struct ib_port_attr attr;
3674         int err;
3675
3676         err = nes_query_port(ibdev, port_num, &attr);
3677         if (err)
3678                 return err;
3679
3680         immutable->pkey_tbl_len = attr.pkey_tbl_len;
3681         immutable->gid_tbl_len = attr.gid_tbl_len;
3682         immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3683
3684         return 0;
3685 }
3686
3687 static void get_dev_fw_str(struct ib_device *dev, char *str,
3688                            size_t str_len)
3689 {
3690         struct nes_ib_device *nesibdev =
3691                         container_of(dev, struct nes_ib_device, ibdev);
3692         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3693
3694         nes_debug(NES_DBG_INIT, "\n");
3695         snprintf(str, str_len, "%u.%u",
3696                  (nesvnic->nesdev->nesadapter->firmware_version >> 16),
3697                  (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
3698 }
3699
3700 /**
3701  * nes_init_ofa_device
3702  */
3703 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3704 {
3705         struct nes_ib_device *nesibdev;
3706         struct nes_vnic *nesvnic = netdev_priv(netdev);
3707         struct nes_device *nesdev = nesvnic->nesdev;
3708
3709         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3710         if (nesibdev == NULL) {
3711                 return NULL;
3712         }
3713         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3714         nesibdev->ibdev.owner = THIS_MODULE;
3715
3716         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3717         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3718         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3719
3720         nesibdev->ibdev.uverbs_cmd_mask =
3721                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3722                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3723                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3724                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3725                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3726                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3727                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3728                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3729                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3730                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3731                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3732                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3733                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3734                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3735                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3736                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3737                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3738                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3739                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3740                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3741                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3742                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3743
3744         nesibdev->ibdev.phys_port_cnt = 1;
3745         nesibdev->ibdev.num_comp_vectors = 1;
3746         nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3747         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3748         nesibdev->ibdev.query_device = nes_query_device;
3749         nesibdev->ibdev.query_port = nes_query_port;
3750         nesibdev->ibdev.query_pkey = nes_query_pkey;
3751         nesibdev->ibdev.query_gid = nes_query_gid;
3752         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3753         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3754         nesibdev->ibdev.mmap = nes_mmap;
3755         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3756         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3757         nesibdev->ibdev.create_ah = nes_create_ah;
3758         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3759         nesibdev->ibdev.create_qp = nes_create_qp;
3760         nesibdev->ibdev.modify_qp = nes_modify_qp;
3761         nesibdev->ibdev.query_qp = nes_query_qp;
3762         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3763         nesibdev->ibdev.create_cq = nes_create_cq;
3764         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3765         nesibdev->ibdev.poll_cq = nes_poll_cq;
3766         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3767         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3768         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3769         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3770         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3771
3772         nesibdev->ibdev.alloc_mr = nes_alloc_mr;
3773         nesibdev->ibdev.map_mr_sg = nes_map_mr_sg;
3774
3775         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3776         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3777         nesibdev->ibdev.process_mad = nes_process_mad;
3778
3779         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3780         nesibdev->ibdev.post_send = nes_post_send;
3781         nesibdev->ibdev.post_recv = nes_post_recv;
3782         nesibdev->ibdev.drain_sq = nes_drain_sq;
3783         nesibdev->ibdev.drain_rq = nes_drain_rq;
3784
3785         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3786         if (nesibdev->ibdev.iwcm == NULL) {
3787                 ib_dealloc_device(&nesibdev->ibdev);
3788                 return NULL;
3789         }
3790         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3791         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3792         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3793         nesibdev->ibdev.iwcm->connect = nes_connect;
3794         nesibdev->ibdev.iwcm->accept = nes_accept;
3795         nesibdev->ibdev.iwcm->reject = nes_reject;
3796         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3797         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3798         nesibdev->ibdev.get_port_immutable   = nes_port_immutable;
3799         nesibdev->ibdev.get_dev_fw_str   = get_dev_fw_str;
3800         memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3801                sizeof(nesibdev->ibdev.iwcm->ifname));
3802
3803         return nesibdev;
3804 }
3805
3806
3807 /**
3808  * nes_handle_delayed_event
3809  */
3810 static void nes_handle_delayed_event(unsigned long data)
3811 {
3812         struct nes_vnic *nesvnic = (void *) data;
3813
3814         if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3815                 struct ib_event event;
3816
3817                 event.device = &nesvnic->nesibdev->ibdev;
3818                 if (!event.device)
3819                         goto stop_timer;
3820                 event.event = nesvnic->delayed_event;
3821                 event.element.port_num = nesvnic->logical_port + 1;
3822                 ib_dispatch_event(&event);
3823         }
3824
3825 stop_timer:
3826         nesvnic->event_timer.function = NULL;
3827 }
3828
3829
3830 void  nes_port_ibevent(struct nes_vnic *nesvnic)
3831 {
3832         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3833         struct nes_device *nesdev = nesvnic->nesdev;
3834         struct ib_event event;
3835         event.device = &nesibdev->ibdev;
3836         event.element.port_num = nesvnic->logical_port + 1;
3837         event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3838
3839         if (!nesvnic->event_timer.function) {
3840                 ib_dispatch_event(&event);
3841                 nesvnic->last_dispatched_event = event.event;
3842                 nesvnic->event_timer.function = nes_handle_delayed_event;
3843                 nesvnic->event_timer.data = (unsigned long) nesvnic;
3844                 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3845                 add_timer(&nesvnic->event_timer);
3846         } else {
3847                 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3848         }
3849         nesvnic->delayed_event = event.event;
3850 }
3851
3852
3853 /**
3854  * nes_destroy_ofa_device
3855  */
3856 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3857 {
3858         if (nesibdev == NULL)
3859                 return;
3860
3861         nes_unregister_ofa_device(nesibdev);
3862
3863         kfree(nesibdev->ibdev.iwcm);
3864         ib_dealloc_device(&nesibdev->ibdev);
3865 }
3866
3867
3868 /**
3869  * nes_register_ofa_device
3870  */
3871 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3872 {
3873         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3874         struct nes_device *nesdev = nesvnic->nesdev;
3875         struct nes_adapter *nesadapter = nesdev->nesadapter;
3876         int i, ret;
3877
3878         ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
3879         if (ret) {
3880                 return ret;
3881         }
3882
3883         /* Get the resources allocated to this device */
3884         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3885         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3886         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3887         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3888
3889         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3890                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3891                 if (ret) {
3892                         while (i > 0) {
3893                                 i--;
3894                                 device_remove_file(&nesibdev->ibdev.dev,
3895                                                    nes_dev_attributes[i]);
3896                         }
3897                         ib_unregister_device(&nesibdev->ibdev);
3898                         return ret;
3899                 }
3900         }
3901
3902         nesvnic->of_device_registered = 1;
3903
3904         return 0;
3905 }
3906
3907
3908 /**
3909  * nes_unregister_ofa_device
3910  */
3911 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3912 {
3913         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3914         int i;
3915
3916         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3917                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3918         }
3919
3920         if (nesvnic->of_device_registered) {
3921                 ib_unregister_device(&nesibdev->ibdev);
3922         }
3923
3924         nesvnic->of_device_registered = 0;
3925 }