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