drivers/infiniband/hw/nes/nes_verbs.c

   1 /*
   2  * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/random.h>
  37 #include <linux/highmem.h>
  38 #include <linux/slab.h>
  39 #include <asm/byteorder.h>
  40
  41 #include <rdma/ib_verbs.h>
  42 #include <rdma/iw_cm.h>
  43 #include <rdma/ib_user_verbs.h>
  44
  45 #include "nes.h"
  46
  47 #include <rdma/ib_umem.h>
  48
  49 atomic_t mod_qp_timouts;
  50 atomic_t qps_created;
  51 atomic_t sw_qps_destroyed;
  52
  53 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
  54 static int nes_dereg_mr(struct ib_mr *ib_mr);
  55
  56 /**
  57  * nes_alloc_mw
  58  */
  59 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
  60                                   struct ib_udata *udata)
  61 {
  62         struct nes_pd *nespd = to_nespd(ibpd);
  63         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
  64         struct nes_device *nesdev = nesvnic->nesdev;
  65         struct nes_adapter *nesadapter = nesdev->nesadapter;
  66         struct nes_cqp_request *cqp_request;
  67         struct nes_mr *nesmr;
  68         struct ib_mw *ibmw;
  69         struct nes_hw_cqp_wqe *cqp_wqe;
  70         int ret;
  71         u32 stag;
  72         u32 stag_index = 0;
  73         u32 next_stag_index = 0;
  74         u32 driver_key = 0;
  75         u8 stag_key = 0;
  76
  77         if (type != IB_MW_TYPE_1)
  78                 return ERR_PTR(-EINVAL);
  79
  80         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
  81         stag_key = (u8)next_stag_index;
  82
  83         driver_key = 0;
  84
  85         next_stag_index >>= 8;
  86         next_stag_index %= nesadapter->max_mr;
  87
  88         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
  89                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_MW);
  90         if (ret) {
  91                 return ERR_PTR(ret);
  92         }
  93
  94         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
  95         if (!nesmr) {
  96                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
  97                 return ERR_PTR(-ENOMEM);
  98         }
  99
 100         stag = stag_index << 8;
 101         stag |= driver_key;
 102         stag += (u32)stag_key;
 103
 104         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
 105                         stag, stag_index);
 106
 107         /* Register the region with the adapter */
 108         cqp_request = nes_get_cqp_request(nesdev);
 109         if (cqp_request == NULL) {
 110                 kfree(nesmr);
 111                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 112                 return ERR_PTR(-ENOMEM);
 113         }
 114
 115         cqp_request->waiting = 1;
 116         cqp_wqe = &cqp_request->cqp_wqe;
 117
 118         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
 119                         cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
 120                         NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
 121                         NES_CQP_STAG_REM_ACC_EN);
 122
 123         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 124         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
 125         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 126
 127         atomic_set(&cqp_request->refcount, 2);
 128         nes_post_cqp_request(nesdev, cqp_request);
 129
 130         /* Wait for CQP */
 131         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
 132                         NES_EVENT_TIMEOUT);
 133         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
 134                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 135                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
 136         if ((!ret) || (cqp_request->major_code)) {
 137                 nes_put_cqp_request(nesdev, cqp_request);
 138                 kfree(nesmr);
 139                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 140                 if (!ret) {
 141                         return ERR_PTR(-ETIME);
 142                 } else {
 143                         return ERR_PTR(-ENOMEM);
 144                 }
 145         }
 146         nes_put_cqp_request(nesdev, cqp_request);
 147
 148         nesmr->ibmw.rkey = stag;
 149         nesmr->mode = IWNES_MEMREG_TYPE_MW;
 150         ibmw = &nesmr->ibmw;
 151         nesmr->pbl_4k = 0;
 152         nesmr->pbls_used = 0;
 153
 154         return ibmw;
 155 }
 156
 157
 158 /**
 159  * nes_dealloc_mw
 160  */
 161 static int nes_dealloc_mw(struct ib_mw *ibmw)
 162 {
 163         struct nes_mr *nesmr = to_nesmw(ibmw);
 164         struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
 165         struct nes_device *nesdev = nesvnic->nesdev;
 166         struct nes_adapter *nesadapter = nesdev->nesadapter;
 167         struct nes_hw_cqp_wqe *cqp_wqe;
 168         struct nes_cqp_request *cqp_request;
 169         int err = 0;
 170         int ret;
 171
 172         /* Deallocate the window with the adapter */
 173         cqp_request = nes_get_cqp_request(nesdev);
 174         if (cqp_request == NULL) {
 175                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 176                 return -ENOMEM;
 177         }
 178         cqp_request->waiting = 1;
 179         cqp_wqe = &cqp_request->cqp_wqe;
 180         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 181         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
 182         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
 183
 184         atomic_set(&cqp_request->refcount, 2);
 185         nes_post_cqp_request(nesdev, cqp_request);
 186
 187         /* Wait for CQP */
 188         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
 189                         ibmw->rkey);
 190         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
 191                         NES_EVENT_TIMEOUT);
 192         nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
 193                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 194                         ret, cqp_request->major_code, cqp_request->minor_code);
 195         if (!ret)
 196                 err = -ETIME;
 197         else if (cqp_request->major_code)
 198                 err = -EIO;
 199
 200         nes_put_cqp_request(nesdev, cqp_request);
 201
 202         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
 203                         (ibmw->rkey & 0x0fffff00) >> 8);
 204         kfree(nesmr);
 205
 206         return err;
 207 }
 208
 209
 210 /*
 211  * nes_alloc_fast_mr
 212  */
 213 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
 214                              u32 stag, u32 page_count)
 215 {
 216         struct nes_hw_cqp_wqe *cqp_wqe;
 217         struct nes_cqp_request *cqp_request;
 218         unsigned long flags;
 219         int ret;
 220         struct nes_adapter *nesadapter = nesdev->nesadapter;
 221         u32 opcode = 0;
 222         u16 major_code;
 223         u64 region_length = page_count * PAGE_SIZE;
 224
 225
 226         cqp_request = nes_get_cqp_request(nesdev);
 227         if (cqp_request == NULL) {
 228                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 229                 return -ENOMEM;
 230         }
 231         nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
 232                               "region_length = %llu\n",
 233                               page_count, region_length);
 234         cqp_request->waiting = 1;
 235         cqp_wqe = &cqp_request->cqp_wqe;
 236
 237         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 238         if (nesadapter->free_4kpbl > 0) {
 239                 nesadapter->free_4kpbl--;
 240                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 241         } else {
 242                 /* No 4kpbl's available: */
 243                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 244                 nes_debug(NES_DBG_MR, "Out of Pbls\n");
 245                 nes_free_cqp_request(nesdev, cqp_request);
 246                 return -ENOMEM;
 247         }
 248
 249         opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
 250                  NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
 251                  NES_CQP_STAG_REM_ACC_EN;
 252         /*
 253          * The current OFED API does not support the zero based TO option.
 254          * If added then need to changed the NES_CQP_STAG_VA* option.  Also,
 255          * the API does not support that ability to have the MR set for local
 256          * access only when created and not allow the SQ op to override. Given
 257          * this the remote enable must be set here.
 258          */
 259
 260         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 261         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 262         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
 263
 264         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
 265                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
 266         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
 267                         cpu_to_le32(nespd->pd_id & 0x00007fff);
 268
 269         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 270         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
 271         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
 272         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
 273         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
 274         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
 275         barrier();
 276
 277         atomic_set(&cqp_request->refcount, 2);
 278         nes_post_cqp_request(nesdev, cqp_request);
 279
 280         /* Wait for CQP */
 281         ret = wait_event_timeout(cqp_request->waitq,
 282                                  (0 != cqp_request->request_done),
 283                                  NES_EVENT_TIMEOUT);
 284
 285         nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
 286                   "wait_event_timeout ret = %u, CQP Major:Minor codes = "
 287                   "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
 288                   cqp_request->minor_code);
 289         major_code = cqp_request->major_code;
 290         nes_put_cqp_request(nesdev, cqp_request);
 291
 292         if (!ret || major_code) {
 293                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 294                 nesadapter->free_4kpbl++;
 295                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 296         }
 297
 298         if (!ret)
 299                 return -ETIME;
 300         else if (major_code)
 301                 return -EIO;
 302         return 0;
 303 }
 304
 305 /*
 306  * nes_alloc_mr
 307  */
 308 static struct ib_mr *nes_alloc_mr(struct ib_pd *ibpd,
 309                                   enum ib_mr_type mr_type,
 310                                   u32 max_num_sg)
 311 {
 312         struct nes_pd *nespd = to_nespd(ibpd);
 313         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 314         struct nes_device *nesdev = nesvnic->nesdev;
 315         struct nes_adapter *nesadapter = nesdev->nesadapter;
 316
 317         u32 next_stag_index;
 318         u8 stag_key = 0;
 319         u32 driver_key = 0;
 320         int err = 0;
 321         u32 stag_index = 0;
 322         struct nes_mr *nesmr;
 323         u32 stag;
 324         int ret;
 325         struct ib_mr *ibmr;
 326
 327         if (mr_type != IB_MR_TYPE_MEM_REG)
 328                 return ERR_PTR(-EINVAL);
 329
 330         if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 331                 return ERR_PTR(-E2BIG);
 332
 333 /*
 334  * Note:  Set to always use a fixed length single page entry PBL.  This is to allow
 335  *       for the fast_reg_mr operation to always know the size of the PBL.
 336  */
 337         if (max_num_sg > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 338                 return ERR_PTR(-E2BIG);
 339
 340         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
 341         stag_key = (u8)next_stag_index;
 342         next_stag_index >>= 8;
 343         next_stag_index %= nesadapter->max_mr;
 344
 345         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
 346                                  nesadapter->max_mr, &stag_index,
 347                                  &next_stag_index, NES_RESOURCE_FAST_MR);
 348         if (err)
 349                 return ERR_PTR(err);
 350
 351         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
 352         if (!nesmr) {
 353                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 354                 return ERR_PTR(-ENOMEM);
 355         }
 356
 357         stag = stag_index << 8;
 358         stag |= driver_key;
 359         stag += (u32)stag_key;
 360
 361         nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
 362                   stag, stag_index);
 363
 364         ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_num_sg);
 365
 366         if (ret == 0) {
 367                 nesmr->ibmr.rkey = stag;
 368                 nesmr->ibmr.lkey = stag;
 369                 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
 370                 ibmr = &nesmr->ibmr;
 371         } else {
 372                 kfree(nesmr);
 373                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 374                 return ERR_PTR(-ENOMEM);
 375         }
 376
 377         nesmr->pages = pci_alloc_consistent(nesdev->pcidev,
 378                                             max_num_sg * sizeof(u64),
 379                                             &nesmr->paddr);
 380         if (!nesmr->paddr)
 381                 goto err;
 382
 383         nesmr->max_pages = max_num_sg;
 384
 385         return ibmr;
 386
 387 err:
 388         nes_dereg_mr(ibmr);
 389
 390         return ERR_PTR(-ENOMEM);
 391 }
 392
 393 static int nes_set_page(struct ib_mr *ibmr, u64 addr)
 394 {
 395         struct nes_mr *nesmr = to_nesmr(ibmr);
 396
 397         if (unlikely(nesmr->npages == nesmr->max_pages))
 398                 return -ENOMEM;
 399
 400         nesmr->pages[nesmr->npages++] = cpu_to_le64(addr);
 401
 402         return 0;
 403 }
 404
 405 static int nes_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 406                          int sg_nents, unsigned int *sg_offset)
 407 {
 408         struct nes_mr *nesmr = to_nesmr(ibmr);
 409
 410         nesmr->npages = 0;
 411
 412         return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, nes_set_page);
 413 }
 414
 415 /**
 416  * nes_query_device
 417  */
 418 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
 419                             struct ib_udata *uhw)
 420 {
 421         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 422         struct nes_device *nesdev = nesvnic->nesdev;
 423         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 424
 425         if (uhw->inlen || uhw->outlen)
 426                 return -EINVAL;
 427
 428         memset(props, 0, sizeof(*props));
 429         memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
 430
 431         props->fw_ver = nesdev->nesadapter->firmware_version;
 432         props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
 433         props->vendor_id = nesdev->nesadapter->vendor_id;
 434         props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
 435         props->hw_ver = nesdev->nesadapter->hw_rev;
 436         props->max_mr_size = 0x80000000;
 437         props->max_qp = nesibdev->max_qp;
 438         props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 439         props->max_sge = nesdev->nesadapter->max_sge;
 440         props->max_cq = nesibdev->max_cq;
 441         props->max_cqe = nesdev->nesadapter->max_cqe;
 442         props->max_mr = nesibdev->max_mr;
 443         props->max_mw = nesibdev->max_mr;
 444         props->max_pd = nesibdev->max_pd;
 445         props->max_sge_rd = 1;
 446         switch (nesdev->nesadapter->max_irrq_wr) {
 447                 case 0:
 448                         props->max_qp_rd_atom = 2;
 449                         break;
 450                 case 1:
 451                         props->max_qp_rd_atom = 8;
 452                         break;
 453                 case 2:
 454                         props->max_qp_rd_atom = 32;
 455                         break;
 456                 case 3:
 457                         props->max_qp_rd_atom = 64;
 458                         break;
 459                 default:
 460                         props->max_qp_rd_atom = 0;
 461         }
 462         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 463         props->atomic_cap = IB_ATOMIC_NONE;
 464         props->max_map_per_fmr = 1;
 465
 466         return 0;
 467 }
 468
 469
 470 /**
 471  * nes_query_port
 472  */
 473 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 474 {
 475         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 476         struct net_device *netdev = nesvnic->netdev;
 477
 478         /* props being zeroed by the caller, avoid zeroing it here */
 479
 480         props->max_mtu = IB_MTU_4096;
 481         props->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
 482
 483         props->lid = 1;
 484         if (netif_queue_stopped(netdev))
 485                 props->state = IB_PORT_DOWN;
 486         else if (nesvnic->linkup)
 487                 props->state = IB_PORT_ACTIVE;
 488         else
 489                 props->state = IB_PORT_DOWN;
 490         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 491                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 492         props->gid_tbl_len = 1;
 493         props->pkey_tbl_len = 1;
 494         props->active_width = IB_WIDTH_4X;
 495         props->active_speed = IB_SPEED_SDR;
 496         props->max_msg_sz = 0x80000000;
 497
 498         return 0;
 499 }
 500
 501 /**
 502  * nes_query_pkey
 503  */
 504 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 505 {
 506         *pkey = 0;
 507         return 0;
 508 }
 509
 510
 511 /**
 512  * nes_query_gid
 513  */
 514 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 515                 int index, union ib_gid *gid)
 516 {
 517         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 518
 519         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 520         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 521
 522         return 0;
 523 }
 524
 525
 526 /**
 527  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 528  * of all objects associated with a particular user-mode client.
 529  */
 530 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 531                 struct ib_udata *udata)
 532 {
 533         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 534         struct nes_device *nesdev = nesvnic->nesdev;
 535         struct nes_adapter *nesadapter = nesdev->nesadapter;
 536         struct nes_alloc_ucontext_req req;
 537         struct nes_alloc_ucontext_resp uresp;
 538         struct nes_ucontext *nes_ucontext;
 539         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 540
 541
 542         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 543                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 544                 return ERR_PTR(-EINVAL);
 545         }
 546
 547         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 548                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 549                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 550                 return ERR_PTR(-EINVAL);
 551         }
 552
 553
 554         memset(&uresp, 0, sizeof uresp);
 555
 556         uresp.max_qps = nesibdev->max_qp;
 557         uresp.max_pds = nesibdev->max_pd;
 558         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 559         uresp.virtwq = nesadapter->virtwq;
 560         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 561
 562         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 563         if (!nes_ucontext)
 564                 return ERR_PTR(-ENOMEM);
 565
 566         nes_ucontext->nesdev = nesdev;
 567         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 568         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 569                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 570                         PAGE_SIZE;
 571
 572
 573         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 574                 kfree(nes_ucontext);
 575                 return ERR_PTR(-EFAULT);
 576         }
 577
 578         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 579         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 580         atomic_set(&nes_ucontext->usecnt, 1);
 581         return &nes_ucontext->ibucontext;
 582 }
 583
 584
 585 /**
 586  * nes_dealloc_ucontext
 587  */
 588 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 589 {
 590         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 591         /* struct nes_device *nesdev = nesvnic->nesdev; */
 592         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 593
 594         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 595           return 0;
 596         kfree(nes_ucontext);
 597         return 0;
 598 }
 599
 600
 601 /**
 602  * nes_mmap
 603  */
 604 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 605 {
 606         unsigned long index;
 607         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 608         struct nes_device *nesdev = nesvnic->nesdev;
 609         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 610         struct nes_ucontext *nes_ucontext;
 611         struct nes_qp *nesqp;
 612
 613         nes_ucontext = to_nesucontext(context);
 614
 615
 616         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 617                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 618                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 619                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 620                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 621                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 622                         return -EFAULT;
 623                 }
 624                 nesqp = nes_ucontext->mmap_nesqp[index];
 625                 if (nesqp == NULL) {
 626                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 627                         return -EFAULT;
 628                 }
 629                 if (remap_pfn_range(vma, vma->vm_start,
 630                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 631                                 vma->vm_end - vma->vm_start,
 632                                 vma->vm_page_prot)) {
 633                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 634                         return -EAGAIN;
 635                 }
 636                 vma->vm_private_data = nesqp;
 637                 return 0;
 638         } else {
 639                 index = vma->vm_pgoff;
 640                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 641                         return -EFAULT;
 642
 643                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 644                 if (io_remap_pfn_range(vma, vma->vm_start,
 645                                 (nesdev->doorbell_start +
 646                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 647                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 648                         return -EAGAIN;
 649                 vma->vm_private_data = nes_ucontext;
 650                 return 0;
 651         }
 652
 653         return -ENOSYS;
 654 }
 655
 656
 657 /**
 658  * nes_alloc_pd
 659  */
 660 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 661                 struct ib_ucontext *context, struct ib_udata *udata)
 662 {
 663         struct nes_pd *nespd;
 664         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 665         struct nes_device *nesdev = nesvnic->nesdev;
 666         struct nes_adapter *nesadapter = nesdev->nesadapter;
 667         struct nes_ucontext *nesucontext;
 668         struct nes_alloc_pd_resp uresp;
 669         u32 pd_num = 0;
 670         int err;
 671
 672         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 673                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 674                         netdev_refcnt_read(nesvnic->netdev));
 675
 676         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 677                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
 678         if (err) {
 679                 return ERR_PTR(err);
 680         }
 681
 682         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 683         if (!nespd) {
 684                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 685                 return ERR_PTR(-ENOMEM);
 686         }
 687
 688         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 689                         nespd, nesvnic->nesibdev->ibdev.name);
 690
 691         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 692
 693         if (context) {
 694                 nesucontext = to_nesucontext(context);
 695                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 696                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 697                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 698                                 nespd->mmap_db_index, nespd->pd_id);
 699                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 700                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 701                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 702                         kfree(nespd);
 703                         return ERR_PTR(-ENOMEM);
 704                 }
 705
 706                 uresp.pd_id = nespd->pd_id;
 707                 uresp.mmap_db_index = nespd->mmap_db_index;
 708                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 709                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 710                         kfree(nespd);
 711                         return ERR_PTR(-EFAULT);
 712                 }
 713
 714                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 715                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 716                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 717         }
 718
 719         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 720         return &nespd->ibpd;
 721 }
 722
 723
 724 /**
 725  * nes_dealloc_pd
 726  */
 727 static int nes_dealloc_pd(struct ib_pd *ibpd)
 728 {
 729         struct nes_ucontext *nesucontext;
 730         struct nes_pd *nespd = to_nespd(ibpd);
 731         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 732         struct nes_device *nesdev = nesvnic->nesdev;
 733         struct nes_adapter *nesadapter = nesdev->nesadapter;
 734
 735         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 736                 nesucontext = to_nesucontext(ibpd->uobject->context);
 737                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 738                                 nespd->mmap_db_index);
 739                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 740                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 741                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 742                         nesucontext->first_free_db = nespd->mmap_db_index;
 743                 }
 744         }
 745
 746         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 747                         nespd->pd_id, nespd);
 748         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 749                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 750         kfree(nespd);
 751
 752         return 0;
 753 }
 754
 755
 756 /**
 757  * nes_create_ah
 758  */
 759 static struct ib_ah *nes_create_ah(struct ib_pd *pd,
 760                                    struct rdma_ah_attr *ah_attr,
 761                                    struct ib_udata *udata)
 762 {
 763         return ERR_PTR(-ENOSYS);
 764 }
 765
 766
 767 /**
 768  * nes_destroy_ah
 769  */
 770 static int nes_destroy_ah(struct ib_ah *ah)
 771 {
 772         return -ENOSYS;
 773 }
 774
 775
 776 /**
 777  * nes_get_encoded_size
 778  */
 779 static inline u8 nes_get_encoded_size(int *size)
 780 {
 781         u8 encoded_size = 0;
 782         if (*size <= 32) {
 783                 *size = 32;
 784                 encoded_size = 1;
 785         } else if (*size <= 128) {
 786                 *size = 128;
 787                 encoded_size = 2;
 788         } else if (*size <= 512) {
 789                 *size = 512;
 790                 encoded_size = 3;
 791         }
 792         return (encoded_size);
 793 }
 794
 795
 796
 797 /**
 798  * nes_setup_virt_qp
 799  */
 800 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 801                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 802 {
 803         unsigned long flags;
 804         void *mem;
 805         __le64 *pbl = NULL;
 806         __le64 *tpbl;
 807         __le64 *pblbuffer;
 808         struct nes_device *nesdev = nesvnic->nesdev;
 809         struct nes_adapter *nesadapter = nesdev->nesadapter;
 810         u32 pbl_entries;
 811         u8 rq_pbl_entries;
 812         u8 sq_pbl_entries;
 813
 814         pbl_entries = nespbl->pbl_size >> 3;
 815         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 816                         nespbl->pbl_size, pbl_entries,
 817                         (void *)nespbl->pbl_vbase,
 818                         (unsigned long) nespbl->pbl_pbase);
 819         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 820         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 821         /* the first pbl to be fro the rq_vbase... */
 822         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 823         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 824         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 825         if (!nespbl->page) {
 826                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 827                 kfree(nespbl);
 828                 return -ENOMEM;
 829         }
 830
 831         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 832         nesqp->page = nespbl->page;
 833         if (!nesqp->hwqp.sq_vbase) {
 834                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 835                 kfree(nespbl);
 836                 return -ENOMEM;
 837         }
 838
 839         /* Now to get to sq.. we need to calculate how many */
 840         /* PBL entries were used by the rq.. */
 841         pbl += sq_pbl_entries;
 842         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 843         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 844         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 845
 846         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 847                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 848                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 849         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 850         if (!nesadapter->free_256pbl) {
 851                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 852                                 nespbl->pbl_pbase);
 853                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 854                 kunmap(nesqp->page);
 855                 kfree(nespbl);
 856                 return -ENOMEM;
 857         }
 858         nesadapter->free_256pbl--;
 859         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 860
 861         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 862         pblbuffer = nesqp->pbl_vbase;
 863         if (!nesqp->pbl_vbase) {
 864                 /* memory allocated during nes_reg_user_mr() */
 865                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 866                                     nespbl->pbl_pbase);
 867                 kfree(nespbl);
 868                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 869                 nesadapter->free_256pbl++;
 870                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 871                 kunmap(nesqp->page);
 872                 return -ENOMEM;
 873         }
 874         memset(nesqp->pbl_vbase, 0, 256);
 875         /* fill in the page address in the pbl buffer.. */
 876         tpbl = pblbuffer + 16;
 877         pbl = (__le64 *)nespbl->pbl_vbase;
 878         while (sq_pbl_entries--)
 879                 *tpbl++ = *pbl++;
 880         tpbl = pblbuffer;
 881         while (rq_pbl_entries--)
 882                 *tpbl++ = *pbl++;
 883
 884         /* done with memory allocated during nes_reg_user_mr() */
 885         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 886                             nespbl->pbl_pbase);
 887         kfree(nespbl);
 888
 889         nesqp->qp_mem_size =
 890                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
 891         /* Round up to a multiple of a page */
 892         nesqp->qp_mem_size += PAGE_SIZE - 1;
 893         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 894
 895         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 896                         &nesqp->hwqp.q2_pbase);
 897
 898         if (!mem) {
 899                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
 900                 nesqp->pbl_vbase = NULL;
 901                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 902                 nesadapter->free_256pbl++;
 903                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 904                 kunmap(nesqp->page);
 905                 return -ENOMEM;
 906         }
 907         nesqp->sq_kmapped = 1;
 908         nesqp->hwqp.q2_vbase = mem;
 909         mem += 256;
 910         memset(nesqp->hwqp.q2_vbase, 0, 256);
 911         nesqp->nesqp_context = mem;
 912         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
 913         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
 914
 915         return 0;
 916 }
 917
 918
 919 /**
 920  * nes_setup_mmap_qp
 921  */
 922 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
 923                 int sq_size, int rq_size)
 924 {
 925         void *mem;
 926         struct nes_device *nesdev = nesvnic->nesdev;
 927
 928         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
 929                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
 930                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
 931                         256; /* this is Q2 */
 932         /* Round up to a multiple of a page */
 933         nesqp->qp_mem_size += PAGE_SIZE - 1;
 934         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 935
 936         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 937                         &nesqp->hwqp.sq_pbase);
 938         if (!mem)
 939                 return -ENOMEM;
 940         nes_debug(NES_DBG_QP, "PCI consistent memory for "
 941                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
 942                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
 943
 944         memset(mem, 0, nesqp->qp_mem_size);
 945
 946         nesqp->hwqp.sq_vbase = mem;
 947         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
 948
 949         nesqp->hwqp.rq_vbase = mem;
 950         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
 951                         sizeof(struct nes_hw_qp_wqe) * sq_size;
 952         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
 953
 954         nesqp->hwqp.q2_vbase = mem;
 955         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
 956                         sizeof(struct nes_hw_qp_wqe) * rq_size;
 957         mem += 256;
 958         memset(nesqp->hwqp.q2_vbase, 0, 256);
 959
 960         nesqp->nesqp_context = mem;
 961         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
 962         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
 963         return 0;
 964 }
 965
 966
 967 /**
 968  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
 969  */
 970 static void nes_free_qp_mem(struct nes_device *nesdev,
 971                 struct nes_qp *nesqp, int virt_wqs)
 972 {
 973         unsigned long flags;
 974         struct nes_adapter *nesadapter = nesdev->nesadapter;
 975         if (!virt_wqs) {
 976                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 977                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
 978         }else {
 979                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 980                 nesadapter->free_256pbl++;
 981                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 982                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
 983                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
 984                 nesqp->pbl_vbase = NULL;
 985                 if (nesqp->sq_kmapped) {
 986                         nesqp->sq_kmapped = 0;
 987                         kunmap(nesqp->page);
 988                 }
 989         }
 990 }
 991
 992
 993 /**
 994  * nes_create_qp
 995  */
 996 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
 997                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
 998 {
 999         u64 u64temp= 0;
1000         u64 u64nesqp = 0;
1001         struct nes_pd *nespd = to_nespd(ibpd);
1002         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1003         struct nes_device *nesdev = nesvnic->nesdev;
1004         struct nes_adapter *nesadapter = nesdev->nesadapter;
1005         struct nes_qp *nesqp;
1006         struct nes_cq *nescq;
1007         struct nes_ucontext *nes_ucontext;
1008         struct nes_hw_cqp_wqe *cqp_wqe;
1009         struct nes_cqp_request *cqp_request;
1010         struct nes_create_qp_req req;
1011         struct nes_create_qp_resp uresp;
1012         struct nes_pbl  *nespbl = NULL;
1013         u32 qp_num = 0;
1014         u32 opcode = 0;
1015         /* u32 counter = 0; */
1016         void *mem;
1017         unsigned long flags;
1018         int ret;
1019         int err;
1020         int virt_wqs = 0;
1021         int sq_size;
1022         int rq_size;
1023         u8 sq_encoded_size;
1024         u8 rq_encoded_size;
1025         /* int counter; */
1026
1027         if (init_attr->create_flags)
1028                 return ERR_PTR(-EINVAL);
1029
1030         atomic_inc(&qps_created);
1031         switch (init_attr->qp_type) {
1032                 case IB_QPT_RC:
1033                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1034                                 init_attr->cap.max_inline_data = 0;
1035                         } else {
1036                                 init_attr->cap.max_inline_data = 64;
1037                         }
1038                         sq_size = init_attr->cap.max_send_wr;
1039                         rq_size = init_attr->cap.max_recv_wr;
1040
1041                         /* check if the encoded sizes are OK or not... */
1042                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1043                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1044
1045                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1046                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1047                                                 rq_size, sq_size);
1048                                 return ERR_PTR(-EINVAL);
1049                         }
1050
1051                         init_attr->cap.max_send_wr = sq_size -2;
1052                         init_attr->cap.max_recv_wr = rq_size -1;
1053                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1054
1055                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1056                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1057                         if (ret) {
1058                                 return ERR_PTR(ret);
1059                         }
1060
1061                         /* Need 512 (actually now 1024) byte alignment on this structure */
1062                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1063                         if (!mem) {
1064                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1065                                 return ERR_PTR(-ENOMEM);
1066                         }
1067                         u64nesqp = (unsigned long)mem;
1068                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1069                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1070                         u64nesqp &= ~u64temp;
1071                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1072                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1073                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1074                         nesqp->allocated_buffer = mem;
1075
1076                         if (udata) {
1077                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1078                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1079                                         kfree(nesqp->allocated_buffer);
1080                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1081                                         return ERR_PTR(-EFAULT);
1082                                 }
1083                                 if (req.user_wqe_buffers) {
1084                                         virt_wqs = 1;
1085                                 }
1086                                 if (req.user_qp_buffer)
1087                                         nesqp->nesuqp_addr = req.user_qp_buffer;
1088                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1089                                         nesqp->user_mode = 1;
1090                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1091                                         if (virt_wqs) {
1092                                                 err = 1;
1093                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1094                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1095                                                                 list_del(&nespbl->list);
1096                                                                 err = 0;
1097                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1098                                                                           nespbl, nespbl->user_base);
1099                                                                 break;
1100                                                         }
1101                                                 }
1102                                                 if (err) {
1103                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1104                                                                   (long long unsigned int)req.user_wqe_buffers);
1105                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1106                                                         kfree(nesqp->allocated_buffer);
1107                                                         return ERR_PTR(-EFAULT);
1108                                                 }
1109                                         }
1110
1111                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1112                                         nesqp->mmap_sq_db_index =
1113                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1114                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1115                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1116                                                         nespd->mmap_db_index); */
1117                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1118                                                 nes_debug(NES_DBG_QP,
1119                                                           "db index > max user regions, failing create QP\n");
1120                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1121                                                 if (virt_wqs) {
1122                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1123                                                                             nespbl->pbl_pbase);
1124                                                         kfree(nespbl);
1125                                                 }
1126                                                 kfree(nesqp->allocated_buffer);
1127                                                 return ERR_PTR(-ENOMEM);
1128                                         }
1129                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1130                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1131                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1132                                 } else {
1133                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1134                                         kfree(nesqp->allocated_buffer);
1135                                         return ERR_PTR(-EFAULT);
1136                                 }
1137                         }
1138                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1139                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1140                         if (err) {
1141                                 nes_debug(NES_DBG_QP,
1142                                           "error geting qp mem code = %d\n", err);
1143                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1144                                 kfree(nesqp->allocated_buffer);
1145                                 return ERR_PTR(-ENOMEM);
1146                         }
1147
1148                         nesqp->hwqp.sq_size = sq_size;
1149                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1150                         nesqp->hwqp.sq_head = 1;
1151                         nesqp->hwqp.rq_size = rq_size;
1152                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1153                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1154                                         (void *)nesqp->nesqp_context_pbase);
1155                         */
1156                         nesqp->hwqp.qp_id = qp_num;
1157                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1158                         nesqp->nespd = nespd;
1159
1160                         nescq = to_nescq(init_attr->send_cq);
1161                         nesqp->nesscq = nescq;
1162                         nescq = to_nescq(init_attr->recv_cq);
1163                         nesqp->nesrcq = nescq;
1164
1165                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1166                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1167                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1168                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1169                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1170                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1171                         if (!udata) {
1172                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1173                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1174                         }
1175                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1176                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1177                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1178                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1179                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1180
1181
1182                         if (!virt_wqs) {
1183                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1184                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1185                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1186                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1187                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1188                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1189                         } else {
1190                                 u64temp = (u64)nesqp->pbl_pbase;
1191                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1192                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1193                         }
1194
1195                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1196                                         nesvnic->next_qp_nic_index,
1197                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1198                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1199                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1200                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1201                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1202                         nesvnic->next_qp_nic_index++;
1203                         if ((nesvnic->next_qp_nic_index > 3) ||
1204                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1205                                 nesvnic->next_qp_nic_index = 0;
1206                         }
1207                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1208
1209                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1210                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1211                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1212                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1213                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1214                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1215                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1216                                         NES_QPCONTEXT_ORDIRD_AAH |
1217                                         ((((u32)nesadapter->max_irrq_wr) <<
1218                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1219                         if (disable_mpa_crc) {
1220                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1221                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1222                         }
1223
1224
1225                         /* Create the QP */
1226                         cqp_request = nes_get_cqp_request(nesdev);
1227                         if (cqp_request == NULL) {
1228                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1229                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1230                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1231                                 kfree(nesqp->allocated_buffer);
1232                                 return ERR_PTR(-ENOMEM);
1233                         }
1234                         cqp_request->waiting = 1;
1235                         cqp_wqe = &cqp_request->cqp_wqe;
1236
1237                         if (!virt_wqs) {
1238                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1239                                         NES_CQP_QP_IWARP_STATE_IDLE;
1240                         } else {
1241                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1242                                         NES_CQP_QP_IWARP_STATE_IDLE;
1243                         }
1244                         opcode |= NES_CQP_QP_CQS_VALID;
1245                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1246                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1247                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1248
1249                         u64temp = (u64)nesqp->nesqp_context_pbase;
1250                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1251
1252                         atomic_set(&cqp_request->refcount, 2);
1253                         nes_post_cqp_request(nesdev, cqp_request);
1254
1255                         /* Wait for CQP */
1256                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1257                                         nesqp->hwqp.qp_id);
1258                         ret = wait_event_timeout(cqp_request->waitq,
1259                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1260                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1261                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1262                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1263                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1264                                         cqp_request->major_code, cqp_request->minor_code);
1265                         if ((!ret) || (cqp_request->major_code)) {
1266                                 nes_put_cqp_request(nesdev, cqp_request);
1267                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1268                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1269                                 kfree(nesqp->allocated_buffer);
1270                                 if (!ret) {
1271                                         return ERR_PTR(-ETIME);
1272                                 } else {
1273                                         return ERR_PTR(-EIO);
1274                                 }
1275                         }
1276
1277                         nes_put_cqp_request(nesdev, cqp_request);
1278
1279                         if (ibpd->uobject) {
1280                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1281                                 uresp.mmap_rq_db_index = 0;
1282                                 uresp.actual_sq_size = sq_size;
1283                                 uresp.actual_rq_size = rq_size;
1284                                 uresp.qp_id = nesqp->hwqp.qp_id;
1285                                 uresp.nes_drv_opt = nes_drv_opt;
1286                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1287                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1288                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1289                                         kfree(nesqp->allocated_buffer);
1290                                         return ERR_PTR(-EFAULT);
1291                                 }
1292                         }
1293
1294                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1295                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1296                         spin_lock_init(&nesqp->lock);
1297                         nes_add_ref(&nesqp->ibqp);
1298                         break;
1299                 default:
1300                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1301                         return ERR_PTR(-EINVAL);
1302         }
1303         init_completion(&nesqp->sq_drained);
1304         init_completion(&nesqp->rq_drained);
1305
1306         nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1307         setup_timer(&nesqp->terminate_timer, nes_terminate_timeout,
1308                     (unsigned long)nesqp);
1309
1310         /* update the QP table */
1311         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1312         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1313                         netdev_refcnt_read(nesvnic->netdev));
1314
1315         return &nesqp->ibqp;
1316 }
1317
1318 /**
1319  * nes_clean_cq
1320  */
1321 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1322 {
1323         u32 cq_head;
1324         u32 lo;
1325         u32 hi;
1326         u64 u64temp;
1327         unsigned long flags = 0;
1328
1329         spin_lock_irqsave(&nescq->lock, flags);
1330
1331         cq_head = nescq->hw_cq.cq_head;
1332         while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1333                 rmb();
1334                 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1335                 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1336                 u64temp = (((u64)hi) << 32) | ((u64)lo);
1337                 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1338                 if (u64temp == (u64)(unsigned long)nesqp) {
1339                         /* Zero the context value so cqe will be ignored */
1340                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1341                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1342                 }
1343
1344                 if (++cq_head >= nescq->hw_cq.cq_size)
1345                         cq_head = 0;
1346         }
1347
1348         spin_unlock_irqrestore(&nescq->lock, flags);
1349 }
1350
1351
1352 /**
1353  * nes_destroy_qp
1354  */
1355 static int nes_destroy_qp(struct ib_qp *ibqp)
1356 {
1357         struct nes_qp *nesqp = to_nesqp(ibqp);
1358         struct nes_ucontext *nes_ucontext;
1359         struct ib_qp_attr attr;
1360         struct iw_cm_id *cm_id;
1361         struct iw_cm_event cm_event;
1362         int ret = 0;
1363
1364         atomic_inc(&sw_qps_destroyed);
1365         nesqp->destroyed = 1;
1366
1367         /* Blow away the connection if it exists. */
1368         if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1369                 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1370                 attr.qp_state = IB_QPS_ERR;
1371                 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1372         }
1373
1374         if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1375                         (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1376                 cm_id = nesqp->cm_id;
1377                 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1378                 cm_event.status = -ETIMEDOUT;
1379                 cm_event.local_addr = cm_id->local_addr;
1380                 cm_event.remote_addr = cm_id->remote_addr;
1381                 cm_event.private_data = NULL;
1382                 cm_event.private_data_len = 0;
1383
1384                 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1385                                 "QP%u. cm_id = %p, refcount = %u. \n",
1386                                 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1387
1388                 cm_id->rem_ref(cm_id);
1389                 ret = cm_id->event_handler(cm_id, &cm_event);
1390                 if (ret)
1391                         nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1392         }
1393
1394         if (nesqp->user_mode) {
1395                 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1396                         nes_ucontext = to_nesucontext(ibqp->uobject->context);
1397                         clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1398                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1399                         if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1400                                 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1401                         }
1402                 }
1403                 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1404                         nesqp->sq_kmapped = 0;
1405                         kunmap(nesqp->page);
1406                 }
1407         } else {
1408                 /* Clean any pending completions from the cq(s) */
1409                 if (nesqp->nesscq)
1410                         nes_clean_cq(nesqp, nesqp->nesscq);
1411
1412                 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1413                         nes_clean_cq(nesqp, nesqp->nesrcq);
1414         }
1415         nes_rem_ref(&nesqp->ibqp);
1416         return 0;
1417 }
1418
1419
1420 /**
1421  * nes_create_cq
1422  */
1423 static struct ib_cq *nes_create_cq(struct ib_device *ibdev,
1424                                    const struct ib_cq_init_attr *attr,
1425                                    struct ib_ucontext *context,
1426                                    struct ib_udata *udata)
1427 {
1428         int entries = attr->cqe;
1429         u64 u64temp;
1430         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1431         struct nes_device *nesdev = nesvnic->nesdev;
1432         struct nes_adapter *nesadapter = nesdev->nesadapter;
1433         struct nes_cq *nescq;
1434         struct nes_ucontext *nes_ucontext = NULL;
1435         struct nes_cqp_request *cqp_request;
1436         void *mem = NULL;
1437         struct nes_hw_cqp_wqe *cqp_wqe;
1438         struct nes_pbl *nespbl = NULL;
1439         struct nes_create_cq_req req;
1440         struct nes_create_cq_resp resp;
1441         u32 cq_num = 0;
1442         u32 opcode = 0;
1443         u32 pbl_entries = 1;
1444         int err;
1445         unsigned long flags;
1446         int ret;
1447
1448         if (attr->flags)
1449                 return ERR_PTR(-EINVAL);
1450
1451         if (entries > nesadapter->max_cqe)
1452                 return ERR_PTR(-EINVAL);
1453
1454         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1455                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1456         if (err) {
1457                 return ERR_PTR(err);
1458         }
1459
1460         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1461         if (!nescq) {
1462                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1463                 return ERR_PTR(-ENOMEM);
1464         }
1465
1466         nescq->hw_cq.cq_size = max(entries + 1, 5);
1467         nescq->hw_cq.cq_number = cq_num;
1468         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1469
1470
1471         if (context) {
1472                 nes_ucontext = to_nesucontext(context);
1473                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1474                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1475                         kfree(nescq);
1476                         return ERR_PTR(-EFAULT);
1477                 }
1478                 nesvnic->mcrq_ucontext = nes_ucontext;
1479                 nes_ucontext->mcrqf = req.mcrqf;
1480                 if (nes_ucontext->mcrqf) {
1481                         if (nes_ucontext->mcrqf & 0x80000000)
1482                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1483                         else if (nes_ucontext->mcrqf & 0x40000000)
1484                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1485                         else
1486                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1487                         nescq->mcrqf = nes_ucontext->mcrqf;
1488                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1489                 }
1490                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1491                                 (unsigned long)req.user_cq_buffer, entries);
1492                 err = 1;
1493                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1494                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1495                                 list_del(&nespbl->list);
1496                                 err = 0;
1497                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1498                                                 nespbl);
1499                                 break;
1500                         }
1501                 }
1502                 if (err) {
1503                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1504                         kfree(nescq);
1505                         return ERR_PTR(-EFAULT);
1506                 }
1507
1508                 pbl_entries = nespbl->pbl_size >> 3;
1509                 nescq->cq_mem_size = 0;
1510         } else {
1511                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1512                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1513                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1514
1515                 /* allocate the physical buffer space */
1516                 mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1517                                             &nescq->hw_cq.cq_pbase);
1518                 if (!mem) {
1519                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1520                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1521                         kfree(nescq);
1522                         return ERR_PTR(-ENOMEM);
1523                 }
1524
1525                 nescq->hw_cq.cq_vbase = mem;
1526                 nescq->hw_cq.cq_head = 0;
1527                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1528                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1529                                 (u32)nescq->hw_cq.cq_pbase);
1530         }
1531
1532         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1533         spin_lock_init(&nescq->lock);
1534
1535         /* send CreateCQ request to CQP */
1536         cqp_request = nes_get_cqp_request(nesdev);
1537         if (cqp_request == NULL) {
1538                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1539                 if (!context)
1540                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1541                                         nescq->hw_cq.cq_pbase);
1542                 else {
1543                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1544                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1545                         kfree(nespbl);
1546                 }
1547
1548                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1549                 kfree(nescq);
1550                 return ERR_PTR(-ENOMEM);
1551         }
1552         cqp_request->waiting = 1;
1553         cqp_wqe = &cqp_request->cqp_wqe;
1554
1555         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1556                         NES_CQP_CQ_CHK_OVERFLOW |
1557                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1558
1559         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1560
1561         if (pbl_entries != 1) {
1562                 if (pbl_entries > 32) {
1563                         /* use 4k pbl */
1564                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1565                         if (nesadapter->free_4kpbl == 0) {
1566                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1567                                 nes_free_cqp_request(nesdev, cqp_request);
1568                                 if (!context)
1569                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1570                                                         nescq->hw_cq.cq_pbase);
1571                                 else {
1572                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1573                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1574                                         kfree(nespbl);
1575                                 }
1576                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1577                                 kfree(nescq);
1578                                 return ERR_PTR(-ENOMEM);
1579                         } else {
1580                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1581                                 nescq->virtual_cq = 2;
1582                                 nesadapter->free_4kpbl--;
1583                         }
1584                 } else {
1585                         /* use 256 byte pbl */
1586                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1587                         if (nesadapter->free_256pbl == 0) {
1588                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1589                                 nes_free_cqp_request(nesdev, cqp_request);
1590                                 if (!context)
1591                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1592                                                         nescq->hw_cq.cq_pbase);
1593                                 else {
1594                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1595                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1596                                         kfree(nespbl);
1597                                 }
1598                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1599                                 kfree(nescq);
1600                                 return ERR_PTR(-ENOMEM);
1601                         } else {
1602                                 opcode |= NES_CQP_CQ_VIRT;
1603                                 nescq->virtual_cq = 1;
1604                                 nesadapter->free_256pbl--;
1605                         }
1606                 }
1607         }
1608
1609         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1610
1611         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1612         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1613         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1614                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1615
1616         if (context) {
1617                 if (pbl_entries != 1)
1618                         u64temp = (u64)nespbl->pbl_pbase;
1619                 else
1620                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1621                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1622                                 nes_ucontext->mmap_db_index[0]);
1623         } else {
1624                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1625                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1626         }
1627         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1628         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1629         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1630         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1631                         cpu_to_le32((u32)(u64temp >> 1));
1632         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1633                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1634
1635         atomic_set(&cqp_request->refcount, 2);
1636         nes_post_cqp_request(nesdev, cqp_request);
1637
1638         /* Wait for CQP */
1639         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1640                         nescq->hw_cq.cq_number);
1641         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1642                         NES_EVENT_TIMEOUT * 2);
1643         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1644                         nescq->hw_cq.cq_number, ret);
1645         if ((!ret) || (cqp_request->major_code)) {
1646                 nes_put_cqp_request(nesdev, cqp_request);
1647                 if (!context)
1648                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1649                                         nescq->hw_cq.cq_pbase);
1650                 else {
1651                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1652                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1653                         kfree(nespbl);
1654                 }
1655                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1656                 kfree(nescq);
1657                 return ERR_PTR(-EIO);
1658         }
1659         nes_put_cqp_request(nesdev, cqp_request);
1660
1661         if (context) {
1662                 /* free the nespbl */
1663                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1664                                 nespbl->pbl_pbase);
1665                 kfree(nespbl);
1666                 resp.cq_id = nescq->hw_cq.cq_number;
1667                 resp.cq_size = nescq->hw_cq.cq_size;
1668                 resp.mmap_db_index = 0;
1669                 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1670                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1671                         kfree(nescq);
1672                         return ERR_PTR(-EFAULT);
1673                 }
1674         }
1675
1676         return &nescq->ibcq;
1677 }
1678
1679
1680 /**
1681  * nes_destroy_cq
1682  */
1683 static int nes_destroy_cq(struct ib_cq *ib_cq)
1684 {
1685         struct nes_cq *nescq;
1686         struct nes_device *nesdev;
1687         struct nes_vnic *nesvnic;
1688         struct nes_adapter *nesadapter;
1689         struct nes_hw_cqp_wqe *cqp_wqe;
1690         struct nes_cqp_request *cqp_request;
1691         unsigned long flags;
1692         u32 opcode = 0;
1693         int ret;
1694
1695         if (ib_cq == NULL)
1696                 return 0;
1697
1698         nescq = to_nescq(ib_cq);
1699         nesvnic = to_nesvnic(ib_cq->device);
1700         nesdev = nesvnic->nesdev;
1701         nesadapter = nesdev->nesadapter;
1702
1703         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1704
1705         /* Send DestroyCQ request to CQP */
1706         cqp_request = nes_get_cqp_request(nesdev);
1707         if (cqp_request == NULL) {
1708                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1709                 return -ENOMEM;
1710         }
1711         cqp_request->waiting = 1;
1712         cqp_wqe = &cqp_request->cqp_wqe;
1713         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1714         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1715         if (nescq->virtual_cq == 1) {
1716                 nesadapter->free_256pbl++;
1717                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1718                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1719                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1720                 }
1721         } else if (nescq->virtual_cq == 2) {
1722                 nesadapter->free_4kpbl++;
1723                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1724                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1725                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1726                 }
1727                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1728         }
1729
1730         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1731
1732         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1733         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1734         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1735                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1736         if (!nescq->mcrqf)
1737                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1738
1739         atomic_set(&cqp_request->refcount, 2);
1740         nes_post_cqp_request(nesdev, cqp_request);
1741
1742         /* Wait for CQP */
1743         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1744                         nescq->hw_cq.cq_number);
1745         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1746                         NES_EVENT_TIMEOUT);
1747         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1748                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1749                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1750                         cqp_request->minor_code);
1751         if (!ret) {
1752                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1753                                         nescq->hw_cq.cq_number);
1754                 ret = -ETIME;
1755         } else if (cqp_request->major_code) {
1756                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1757                                         nescq->hw_cq.cq_number);
1758                 ret = -EIO;
1759         } else {
1760                 ret = 0;
1761         }
1762         nes_put_cqp_request(nesdev, cqp_request);
1763
1764         if (nescq->cq_mem_size)
1765                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1766                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1767         kfree(nescq);
1768
1769         return ret;
1770 }
1771
1772 /**
1773  * root_256
1774  */
1775 static u32 root_256(struct nes_device *nesdev,
1776                     struct nes_root_vpbl *root_vpbl,
1777                     struct nes_root_vpbl *new_root,
1778                     u16 pbl_count_4k)
1779 {
1780         u64 leaf_pbl;
1781         int i, j, k;
1782
1783         if (pbl_count_4k == 1) {
1784                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1785                                                 512, &new_root->pbl_pbase);
1786
1787                 if (new_root->pbl_vbase == NULL)
1788                         return 0;
1789
1790                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1791                 for (i = 0; i < 16; i++) {
1792                         new_root->pbl_vbase[i].pa_low =
1793                                 cpu_to_le32((u32)leaf_pbl);
1794                         new_root->pbl_vbase[i].pa_high =
1795                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1796                         leaf_pbl += 256;
1797                 }
1798         } else {
1799                 for (i = 3; i >= 0; i--) {
1800                         j = i * 16;
1801                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1802                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1803                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1804                                 << 32);
1805                         for (k = 1; k < 16; k++) {
1806                                 leaf_pbl += 256;
1807                                 root_vpbl->pbl_vbase[j + k].pa_low =
1808                                                 cpu_to_le32((u32)leaf_pbl);
1809                                 root_vpbl->pbl_vbase[j + k].pa_high =
1810                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1811                         }
1812                 }
1813         }
1814
1815         return 1;
1816 }
1817
1818
1819 /**
1820  * nes_reg_mr
1821  */
1822 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1823                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1824                 dma_addr_t single_buffer, u16 pbl_count_4k,
1825                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1826                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1827 {
1828         struct nes_hw_cqp_wqe *cqp_wqe;
1829         struct nes_cqp_request *cqp_request;
1830         unsigned long flags;
1831         int ret;
1832         struct nes_adapter *nesadapter = nesdev->nesadapter;
1833         uint pg_cnt = 0;
1834         u16 pbl_count_256 = 0;
1835         u16 pbl_count = 0;
1836         u8  use_256_pbls = 0;
1837         u8  use_4k_pbls = 0;
1838         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1839         struct nes_root_vpbl new_root = { 0, NULL, NULL };
1840         u32 opcode = 0;
1841         u16 major_code;
1842
1843         /* Register the region with the adapter */
1844         cqp_request = nes_get_cqp_request(nesdev);
1845         if (cqp_request == NULL) {
1846                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1847                 return -ENOMEM;
1848         }
1849         cqp_request->waiting = 1;
1850         cqp_wqe = &cqp_request->cqp_wqe;
1851
1852         if (pbl_count_4k) {
1853                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1854
1855                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1856                 pbl_count_256 = (pg_cnt + 31) / 32;
1857                 if (pg_cnt <= 32) {
1858                         if (pbl_count_256 <= nesadapter->free_256pbl)
1859                                 use_256_pbls = 1;
1860                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1861                                 use_4k_pbls = 1;
1862                 } else if (pg_cnt <= 2048) {
1863                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1864                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1865                                 use_4k_pbls = 1;
1866                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1867                                 use_256_pbls = 1;
1868                                 use_two_level = 1;
1869                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1870                                 use_4k_pbls = 1;
1871                         }
1872                 } else {
1873                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1874                                 use_4k_pbls = 1;
1875                 }
1876
1877                 if (use_256_pbls) {
1878                         pbl_count = pbl_count_256;
1879                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1880                 } else if (use_4k_pbls) {
1881                         pbl_count =  pbl_count_4k;
1882                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1883                 } else {
1884                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1885                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1886                         nes_free_cqp_request(nesdev, cqp_request);
1887                         return -ENOMEM;
1888                 }
1889
1890                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1891         }
1892
1893         if (use_256_pbls && use_two_level) {
1894                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1895                         if (new_root.pbl_pbase != 0)
1896                                 root_vpbl = &new_root;
1897                 } else {
1898                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1899                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1900                         use_256_pbls = 0;
1901
1902                         if (pbl_count_4k == 1)
1903                                 use_two_level = 0;
1904                         pbl_count = pbl_count_4k;
1905
1906                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1907                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
1908                                 use_4k_pbls = 1;
1909                         }
1910                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1911
1912                         if (use_4k_pbls == 0)
1913                                 return -ENOMEM;
1914                 }
1915         }
1916
1917         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
1918                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
1919         if (acc & IB_ACCESS_LOCAL_WRITE)
1920                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
1921         if (acc & IB_ACCESS_REMOTE_WRITE)
1922                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
1923         if (acc & IB_ACCESS_REMOTE_READ)
1924                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
1925         if (acc & IB_ACCESS_MW_BIND)
1926                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
1927
1928         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1929         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1930         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
1931         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
1932
1933         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
1934                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
1935         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
1936                         cpu_to_le32(nespd->pd_id & 0x00007fff);
1937         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
1938
1939         if (pbl_count == 0) {
1940                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
1941         } else {
1942                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
1943                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
1944                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
1945
1946                 if (use_4k_pbls)
1947                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
1948         }
1949         barrier();
1950
1951         atomic_set(&cqp_request->refcount, 2);
1952         nes_post_cqp_request(nesdev, cqp_request);
1953
1954         /* Wait for CQP */
1955         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1956                         NES_EVENT_TIMEOUT);
1957         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
1958                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1959                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
1960         major_code = cqp_request->major_code;
1961         nes_put_cqp_request(nesdev, cqp_request);
1962
1963         if ((!ret || major_code) && pbl_count != 0) {
1964                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1965                 if (use_256_pbls)
1966                         nesadapter->free_256pbl += pbl_count + use_two_level;
1967                 else if (use_4k_pbls)
1968                         nesadapter->free_4kpbl += pbl_count + use_two_level;
1969                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1970         }
1971         if (new_root.pbl_pbase)
1972                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
1973                                     new_root.pbl_pbase);
1974
1975         if (!ret)
1976                 return -ETIME;
1977         else if (major_code)
1978                 return -EIO;
1979
1980         *actual_pbl_cnt = pbl_count + use_two_level;
1981         *used_4k_pbls = use_4k_pbls;
1982         return 0;
1983 }
1984
1985
1986 /**
1987  * nes_reg_phys_mr
1988  */
1989 struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd, u64 addr, u64 size,
1990                 int acc, u64 *iova_start)
1991 {
1992         u64 region_length;
1993         struct nes_pd *nespd = to_nespd(ib_pd);
1994         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
1995         struct nes_device *nesdev = nesvnic->nesdev;
1996         struct nes_adapter *nesadapter = nesdev->nesadapter;
1997         struct nes_mr *nesmr;
1998         struct ib_mr *ibmr;
1999         struct nes_vpbl vpbl;
2000         struct nes_root_vpbl root_vpbl;
2001         u32 stag;
2002         unsigned long mask;
2003         u32 stag_index = 0;
2004         u32 next_stag_index = 0;
2005         u32 driver_key = 0;
2006         int err = 0;
2007         int ret = 0;
2008         u16 pbl_count = 0;
2009         u8 single_page = 1;
2010         u8 stag_key = 0;
2011
2012         region_length = 0;
2013         vpbl.pbl_vbase = NULL;
2014         root_vpbl.pbl_vbase = NULL;
2015         root_vpbl.pbl_pbase = 0;
2016
2017         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2018         stag_key = (u8)next_stag_index;
2019
2020         driver_key = 0;
2021
2022         next_stag_index >>= 8;
2023         next_stag_index %= nesadapter->max_mr;
2024
2025         if ((addr ^ *iova_start) & ~PAGE_MASK)
2026                 return ERR_PTR(-EINVAL);
2027
2028         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2029                         &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2030         if (err) {
2031                 return ERR_PTR(err);
2032         }
2033
2034         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2035         if (!nesmr) {
2036                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2037                 return ERR_PTR(-ENOMEM);
2038         }
2039
2040         /* Allocate a 4K buffer for the PBL */
2041         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2042                         &vpbl.pbl_pbase);
2043         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2044                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2045         if (!vpbl.pbl_vbase) {
2046                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2047                 ibmr = ERR_PTR(-ENOMEM);
2048                 kfree(nesmr);
2049                 goto reg_phys_err;
2050         }
2051
2052
2053         mask = !size;
2054
2055         if (mask & ~PAGE_MASK) {
2056                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2057                 nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2058                 ibmr = ERR_PTR(-EINVAL);
2059                 kfree(nesmr);
2060                 goto reg_phys_err;
2061         }
2062
2063         region_length += size;
2064         vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)addr & PAGE_MASK);
2065         vpbl.pbl_vbase[0].pa_high = cpu_to_le32((u32)((((u64)addr) >> 32)));
2066
2067         stag = stag_index << 8;
2068         stag |= driver_key;
2069         stag += (u32)stag_key;
2070
2071         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2072                         " length = 0x%016lX, index = 0x%08X\n",
2073                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2074
2075         /* Make the leaf PBL the root if only one PBL */
2076         root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2077
2078         if (single_page) {
2079                 pbl_count = 0;
2080         } else {
2081                 pbl_count = 1;
2082         }
2083         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2084                         addr, pbl_count, 1, acc, iova_start,
2085                         &nesmr->pbls_used, &nesmr->pbl_4k);
2086
2087         if (ret == 0) {
2088                 nesmr->ibmr.rkey = stag;
2089                 nesmr->ibmr.lkey = stag;
2090                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2091                 ibmr = &nesmr->ibmr;
2092         } else {
2093                 kfree(nesmr);
2094                 ibmr = ERR_PTR(-ENOMEM);
2095         }
2096
2097 reg_phys_err:
2098         /* single PBL case */
2099         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2100         return ibmr;
2101 }
2102
2103
2104 /**
2105  * nes_get_dma_mr
2106  */
2107 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2108 {
2109         u64 kva = 0;
2110
2111         nes_debug(NES_DBG_MR, "\n");
2112
2113         return nes_reg_phys_mr(pd, 0, 0xffffffffffULL, acc, &kva);
2114 }
2115
2116 /**
2117  * nes_reg_user_mr
2118  */
2119 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2120                 u64 virt, int acc, struct ib_udata *udata)
2121 {
2122         u64 iova_start;
2123         __le64 *pbl;
2124         u64 region_length;
2125         dma_addr_t last_dma_addr = 0;
2126         dma_addr_t first_dma_addr = 0;
2127         struct nes_pd *nespd = to_nespd(pd);
2128         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2129         struct nes_device *nesdev = nesvnic->nesdev;
2130         struct nes_adapter *nesadapter = nesdev->nesadapter;
2131         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2132         struct scatterlist *sg;
2133         struct nes_ucontext *nes_ucontext;
2134         struct nes_pbl *nespbl;
2135         struct nes_mr *nesmr;
2136         struct ib_umem *region;
2137         struct nes_mem_reg_req req;
2138         struct nes_vpbl vpbl;
2139         struct nes_root_vpbl root_vpbl;
2140         int entry, page_index;
2141         int page_count = 0;
2142         int err, pbl_depth = 0;
2143         int chunk_pages;
2144         int ret;
2145         u32 stag;
2146         u32 stag_index = 0;
2147         u32 next_stag_index;
2148         u32 driver_key;
2149         u32 root_pbl_index = 0;
2150         u32 cur_pbl_index = 0;
2151         u32 skip_pages;
2152         u16 pbl_count;
2153         u8 single_page = 1;
2154         u8 stag_key;
2155         int first_page = 1;
2156
2157         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2158         if (IS_ERR(region)) {
2159                 return (struct ib_mr *)region;
2160         }
2161
2162         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2163                         " offset = %u, page size = %lu.\n",
2164                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2165                         ib_umem_offset(region), BIT(region->page_shift));
2166
2167         skip_pages = ((u32)ib_umem_offset(region)) >> 12;
2168
2169         if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2170                 ib_umem_release(region);
2171                 return ERR_PTR(-EFAULT);
2172         }
2173         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2174
2175         switch (req.reg_type) {
2176                 case IWNES_MEMREG_TYPE_MEM:
2177                         pbl_depth = 0;
2178                         region_length = 0;
2179                         vpbl.pbl_vbase = NULL;
2180                         root_vpbl.pbl_vbase = NULL;
2181                         root_vpbl.pbl_pbase = 0;
2182
2183                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2184                         stag_key = (u8)next_stag_index;
2185
2186                         driver_key = next_stag_index & 0x70000000;
2187
2188                         next_stag_index >>= 8;
2189                         next_stag_index %= nesadapter->max_mr;
2190
2191                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2192                                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2193                         if (err) {
2194                                 ib_umem_release(region);
2195                                 return ERR_PTR(err);
2196                         }
2197
2198                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2199                         if (!nesmr) {
2200                                 ib_umem_release(region);
2201                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2202                                 return ERR_PTR(-ENOMEM);
2203                         }
2204                         nesmr->region = region;
2205
2206                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2207                                 if (sg_dma_address(sg) & ~PAGE_MASK) {
2208                                         ib_umem_release(region);
2209                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2210                                         nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2211                                                   (unsigned int) sg_dma_address(sg));
2212                                         ibmr = ERR_PTR(-EINVAL);
2213                                         kfree(nesmr);
2214                                         goto reg_user_mr_err;
2215                                 }
2216
2217                                 if (!sg_dma_len(sg)) {
2218                                         ib_umem_release(region);
2219                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2220                                                           stag_index);
2221                                         nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2222                                         ibmr = ERR_PTR(-EINVAL);
2223                                         kfree(nesmr);
2224                                         goto reg_user_mr_err;
2225                                 }
2226
2227                                 region_length += sg_dma_len(sg);
2228                                 chunk_pages = sg_dma_len(sg) >> 12;
2229                                 region_length -= skip_pages << 12;
2230                                 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2231                                         skip_pages = 0;
2232                                         if ((page_count != 0) && (page_count << 12) - (ib_umem_offset(region) & (4096 - 1)) >= region->length)
2233                                                 goto enough_pages;
2234                                         if ((page_count&0x01FF) == 0) {
2235                                                 if (page_count >= 1024 * 512) {
2236                                                         ib_umem_release(region);
2237                                                         nes_free_resource(nesadapter,
2238                                                                           nesadapter->allocated_mrs, stag_index);
2239                                                         kfree(nesmr);
2240                                                         ibmr = ERR_PTR(-E2BIG);
2241                                                         goto reg_user_mr_err;
2242                                                 }
2243                                                 if (root_pbl_index == 1) {
2244                                                         root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2245                                                                         8192, &root_vpbl.pbl_pbase);
2246                                                         nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2247                                                                   root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2248                                                         if (!root_vpbl.pbl_vbase) {
2249                                                                 ib_umem_release(region);
2250                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2251                                                                                     vpbl.pbl_pbase);
2252                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2253                                                                                   stag_index);
2254                                                                 kfree(nesmr);
2255                                                                 ibmr = ERR_PTR(-ENOMEM);
2256                                                                 goto reg_user_mr_err;
2257                                                         }
2258                                                         root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2259                                                                         GFP_KERNEL);
2260                                                         if (!root_vpbl.leaf_vpbl) {
2261                                                                 ib_umem_release(region);
2262                                                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2263                                                                                     root_vpbl.pbl_pbase);
2264                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2265                                                                                     vpbl.pbl_pbase);
2266                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2267                                                                                   stag_index);
2268                                                                 kfree(nesmr);
2269                                                                 ibmr = ERR_PTR(-ENOMEM);
2270                                                                 goto reg_user_mr_err;
2271                                                         }
2272                                                         root_vpbl.pbl_vbase[0].pa_low =
2273                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2274                                                         root_vpbl.pbl_vbase[0].pa_high =
2275                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2276                                                         root_vpbl.leaf_vpbl[0] = vpbl;
2277                                                 }
2278                                                 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2279                                                                 &vpbl.pbl_pbase);
2280                                                 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2281                                                           vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2282                                                 if (!vpbl.pbl_vbase) {
2283                                                         ib_umem_release(region);
2284                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2285                                                         ibmr = ERR_PTR(-ENOMEM);
2286                                                         kfree(nesmr);
2287                                                         goto reg_user_mr_err;
2288                                                 }
2289                                                 if (1 <= root_pbl_index) {
2290                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2291                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2292                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2293                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2294                                                         root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2295                                                 }
2296                                                 root_pbl_index++;
2297                                                 cur_pbl_index = 0;
2298                                         }
2299                                         if (single_page) {
2300                                                 if (page_count != 0) {
2301                                                         if ((last_dma_addr+4096) !=
2302                                                                         (sg_dma_address(sg)+
2303                                                                         (page_index*4096)))
2304                                                                 single_page = 0;
2305                                                         last_dma_addr = sg_dma_address(sg)+
2306                                                                         (page_index*4096);
2307                                                 } else {
2308                                                         first_dma_addr = sg_dma_address(sg)+
2309                                                                         (page_index*4096);
2310                                                         last_dma_addr = first_dma_addr;
2311                                                 }
2312                                         }
2313
2314                                         vpbl.pbl_vbase[cur_pbl_index].pa_low =
2315                                                         cpu_to_le32((u32)(sg_dma_address(sg)+
2316                                                         (page_index*4096)));
2317                                         vpbl.pbl_vbase[cur_pbl_index].pa_high =
2318                                                         cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2319                                                         (page_index*4096))) >> 32)));
2320                                         cur_pbl_index++;
2321                                         page_count++;
2322                                 }
2323                         }
2324
2325                         enough_pages:
2326                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2327                                         " stag_key=0x%08x\n",
2328                                         stag_index, driver_key, stag_key);
2329                         stag = stag_index << 8;
2330                         stag |= driver_key;
2331                         stag += (u32)stag_key;
2332
2333                         iova_start = virt;
2334                         /* Make the leaf PBL the root if only one PBL */
2335                         if (root_pbl_index == 1) {
2336                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2337                         }
2338
2339                         if (single_page) {
2340                                 pbl_count = 0;
2341                         } else {
2342                                 pbl_count = root_pbl_index;
2343                                 first_dma_addr = 0;
2344                         }
2345                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2346                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2347                                         stag, (unsigned int)iova_start,
2348                                         (unsigned int)region_length, stag_index,
2349                                         (unsigned long long)region->length, pbl_count);
2350                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2351                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2352                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2353
2354                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2355
2356                         if (ret == 0) {
2357                                 nesmr->ibmr.rkey = stag;
2358                                 nesmr->ibmr.lkey = stag;
2359                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2360                                 ibmr = &nesmr->ibmr;
2361                         } else {
2362                                 ib_umem_release(region);
2363                                 kfree(nesmr);
2364                                 ibmr = ERR_PTR(-ENOMEM);
2365                         }
2366
2367                         reg_user_mr_err:
2368                         /* free the resources */
2369                         if (root_pbl_index == 1) {
2370                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2371                                                 vpbl.pbl_pbase);
2372                         } else {
2373                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2374                                         pci_free_consistent(nesdev->pcidev, 4096,
2375                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2376                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2377                                 }
2378                                 kfree(root_vpbl.leaf_vpbl);
2379                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2380                                                 root_vpbl.pbl_pbase);
2381                         }
2382
2383                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2384
2385                         return ibmr;
2386                 case IWNES_MEMREG_TYPE_QP:
2387                 case IWNES_MEMREG_TYPE_CQ:
2388                         if (!region->length) {
2389                                 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2390                                 ib_umem_release(region);
2391                                 return ERR_PTR(-EINVAL);
2392                         }
2393                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2394                         if (!nespbl) {
2395                                 ib_umem_release(region);
2396                                 return ERR_PTR(-ENOMEM);
2397                         }
2398                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2399                         if (!nesmr) {
2400                                 ib_umem_release(region);
2401                                 kfree(nespbl);
2402                                 return ERR_PTR(-ENOMEM);
2403                         }
2404                         nesmr->region = region;
2405                         nes_ucontext = to_nesucontext(pd->uobject->context);
2406                         pbl_depth = region->length >> 12;
2407                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2408                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2409                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2410                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2411                         } else {
2412                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2413                         }
2414
2415                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2416                                         nespbl->pbl_size, pbl_depth);
2417                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2418                                         &nespbl->pbl_pbase);
2419                         if (!pbl) {
2420                                 ib_umem_release(region);
2421                                 kfree(nesmr);
2422                                 kfree(nespbl);
2423                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2424                                 return ERR_PTR(-ENOMEM);
2425                         }
2426
2427                         nespbl->pbl_vbase = (u64 *)pbl;
2428                         nespbl->user_base = start;
2429                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2430                                         " pbl_vbase=%p user_base=0x%lx\n",
2431                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2432                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2433
2434                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2435                                 chunk_pages = sg_dma_len(sg) >> 12;
2436                                 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2437                                 if (first_page) {
2438                                         nespbl->page = sg_page(sg);
2439                                         first_page = 0;
2440                                 }
2441
2442                                 for (page_index = 0; page_index < chunk_pages; page_index++) {
2443                                         ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2444                                                         (sg_dma_address(sg)+
2445                                                         (page_index*4096)));
2446                                         ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2447                                                         (sg_dma_address(sg)+
2448                                                         (page_index*4096)))>>32);
2449                                         nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2450                                                   (unsigned long long)*pbl,
2451                                                   le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2452                                         pbl++;
2453                                 }
2454                         }
2455
2456                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2457                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2458                         } else {
2459                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2460                         }
2461                         nesmr->ibmr.rkey = -1;
2462                         nesmr->ibmr.lkey = -1;
2463                         nesmr->mode = req.reg_type;
2464                         return &nesmr->ibmr;
2465         }
2466
2467         ib_umem_release(region);
2468         return ERR_PTR(-ENOSYS);
2469 }
2470
2471
2472 /**
2473  * nes_dereg_mr
2474  */
2475 static int nes_dereg_mr(struct ib_mr *ib_mr)
2476 {
2477         struct nes_mr *nesmr = to_nesmr(ib_mr);
2478         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2479         struct nes_device *nesdev = nesvnic->nesdev;
2480         struct nes_adapter *nesadapter = nesdev->nesadapter;
2481         struct nes_hw_cqp_wqe *cqp_wqe;
2482         struct nes_cqp_request *cqp_request;
2483         unsigned long flags;
2484         int ret;
2485         u16 major_code;
2486         u16 minor_code;
2487
2488
2489         if (nesmr->pages)
2490                 pci_free_consistent(nesdev->pcidev,
2491                                     nesmr->max_pages * sizeof(u64),
2492                                     nesmr->pages,
2493                                     nesmr->paddr);
2494
2495         if (nesmr->region) {
2496                 ib_umem_release(nesmr->region);
2497         }
2498         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2499                 kfree(nesmr);
2500                 return 0;
2501         }
2502
2503         /* Deallocate the region with the adapter */
2504
2505         cqp_request = nes_get_cqp_request(nesdev);
2506         if (cqp_request == NULL) {
2507                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2508                 return -ENOMEM;
2509         }
2510         cqp_request->waiting = 1;
2511         cqp_wqe = &cqp_request->cqp_wqe;
2512
2513         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2514         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2515                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2516                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2517         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2518
2519         atomic_set(&cqp_request->refcount, 2);
2520         nes_post_cqp_request(nesdev, cqp_request);
2521
2522         /* Wait for CQP */
2523         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2524         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2525                         NES_EVENT_TIMEOUT);
2526         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2527                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2528                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2529
2530         major_code = cqp_request->major_code;
2531         minor_code = cqp_request->minor_code;
2532
2533         nes_put_cqp_request(nesdev, cqp_request);
2534
2535         if (!ret) {
2536                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2537                                 " ib_mr=%p, rkey = 0x%08X\n",
2538                                 ib_mr, ib_mr->rkey);
2539                 return -ETIME;
2540         } else if (major_code) {
2541                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2542                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2543                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2544                 return -EIO;
2545         }
2546
2547         if (nesmr->pbls_used != 0) {
2548                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2549                 if (nesmr->pbl_4k) {
2550                         nesadapter->free_4kpbl += nesmr->pbls_used;
2551                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2552                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2553                                         "exceeded the max(%u)\n",
2554                                         nesadapter->free_4kpbl,
2555                                         nesadapter->max_4kpbl);
2556                 } else {
2557                         nesadapter->free_256pbl += nesmr->pbls_used;
2558                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2559                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2560                                         "exceeded the max(%u)\n",
2561                                         nesadapter->free_256pbl,
2562                                         nesadapter->max_256pbl);
2563                 }
2564                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2565         }
2566         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2567                         (ib_mr->rkey & 0x0fffff00) >> 8);
2568
2569         kfree(nesmr);
2570
2571         return 0;
2572 }
2573
2574
2575 /**
2576  * show_rev
2577  */
2578 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2579                         char *buf)
2580 {
2581         struct nes_ib_device *nesibdev =
2582                         container_of(dev, struct nes_ib_device, ibdev.dev);
2583         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2584
2585         nes_debug(NES_DBG_INIT, "\n");
2586         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2587 }
2588
2589
2590 /**
2591  * show_hca
2592  */
2593 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2594                         char *buf)
2595 {
2596         nes_debug(NES_DBG_INIT, "\n");
2597         return sprintf(buf, "NES020\n");
2598 }
2599
2600
2601 /**
2602  * show_board
2603  */
2604 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2605                           char *buf)
2606 {
2607         nes_debug(NES_DBG_INIT, "\n");
2608         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2609 }
2610
2611
2612 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2613 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2614 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2615
2616 static struct device_attribute *nes_dev_attributes[] = {
2617         &dev_attr_hw_rev,
2618         &dev_attr_hca_type,
2619         &dev_attr_board_id
2620 };
2621
2622
2623 /**
2624  * nes_query_qp
2625  */
2626 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2627                 int attr_mask, struct ib_qp_init_attr *init_attr)
2628 {
2629         struct nes_qp *nesqp = to_nesqp(ibqp);
2630
2631         nes_debug(NES_DBG_QP, "\n");
2632
2633         attr->qp_access_flags = 0;
2634         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2635         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2636         attr->cap.max_recv_sge = 1;
2637         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2638                 attr->cap.max_inline_data = 0;
2639         else
2640                 attr->cap.max_inline_data = 64;
2641
2642         init_attr->event_handler = nesqp->ibqp.event_handler;
2643         init_attr->qp_context = nesqp->ibqp.qp_context;
2644         init_attr->send_cq = nesqp->ibqp.send_cq;
2645         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2646         init_attr->srq = nesqp->ibqp.srq;
2647         init_attr->cap = attr->cap;
2648
2649         return 0;
2650 }
2651
2652
2653 /**
2654  * nes_hw_modify_qp
2655  */
2656 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2657                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2658 {
2659         struct nes_hw_cqp_wqe *cqp_wqe;
2660         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2661         /* struct iw_cm_event cm_event; */
2662         struct nes_cqp_request *cqp_request;
2663         int ret;
2664         u16 major_code;
2665
2666         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2667                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2668
2669         cqp_request = nes_get_cqp_request(nesdev);
2670         if (cqp_request == NULL) {
2671                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2672                 return -ENOMEM;
2673         }
2674         if (wait_completion) {
2675                 cqp_request->waiting = 1;
2676         } else {
2677                 cqp_request->waiting = 0;
2678         }
2679         cqp_wqe = &cqp_request->cqp_wqe;
2680
2681         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2682                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2683         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2684                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2685         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2686         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2687         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2688
2689         /* If sending a terminate message, fill in the length (in words) */
2690         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2691             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2692                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2693                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2694         }
2695
2696         atomic_set(&cqp_request->refcount, 2);
2697         nes_post_cqp_request(nesdev, cqp_request);
2698
2699         /* Wait for CQP */
2700         if (wait_completion) {
2701                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2702                                 nesqp->hwqp.qp_id); */
2703                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2704                                 NES_EVENT_TIMEOUT);
2705                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2706                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2707                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2708                 major_code = cqp_request->major_code;
2709                 if (major_code) {
2710                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2711                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2712                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2713                                         cqp_request->minor_code, next_iwarp_state);
2714                 }
2715
2716                 nes_put_cqp_request(nesdev, cqp_request);
2717
2718                 if (!ret)
2719                         return -ETIME;
2720                 else if (major_code)
2721                         return -EIO;
2722                 else
2723                         return 0;
2724         } else {
2725                 return 0;
2726         }
2727 }
2728
2729
2730 /**
2731  * nes_modify_qp
2732  */
2733 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2734                 int attr_mask, struct ib_udata *udata)
2735 {
2736         struct nes_qp *nesqp = to_nesqp(ibqp);
2737         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2738         struct nes_device *nesdev = nesvnic->nesdev;
2739         /* u32 cqp_head; */
2740         /* u32 counter; */
2741         u32 next_iwarp_state = 0;
2742         int err;
2743         unsigned long qplockflags;
2744         int ret;
2745         u16 original_last_aeq;
2746         u8 issue_modify_qp = 0;
2747         u8 dont_wait = 0;
2748
2749         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2750                         " iwarp_state=0x%X, refcount=%d\n",
2751                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2752                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2753
2754         spin_lock_irqsave(&nesqp->lock, qplockflags);
2755
2756         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2757                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2758                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2759                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2760
2761         if (attr_mask & IB_QP_STATE) {
2762                 switch (attr->qp_state) {
2763                         case IB_QPS_INIT:
2764                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2765                                                 nesqp->hwqp.qp_id);
2766                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2767                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2768                                         return -EINVAL;
2769                                 }
2770                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2771                                 issue_modify_qp = 1;
2772                                 break;
2773                         case IB_QPS_RTR:
2774                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2775                                                 nesqp->hwqp.qp_id);
2776                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2777                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2778                                         return -EINVAL;
2779                                 }
2780                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2781                                 issue_modify_qp = 1;
2782                                 break;
2783                         case IB_QPS_RTS:
2784                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2785                                                 nesqp->hwqp.qp_id);
2786                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2787                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2788                                         return -EINVAL;
2789                                 }
2790                                 if (nesqp->cm_id == NULL) {
2791                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2792                                                         nesqp->hwqp.qp_id );
2793                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2794                                         return -EINVAL;
2795                                 }
2796                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2797                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2798                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2799                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2800                                 issue_modify_qp = 1;
2801                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2802                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2803                                 nesqp->hte_added = 1;
2804                                 break;
2805                         case IB_QPS_SQD:
2806                                 issue_modify_qp = 1;
2807                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2808                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2809                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2810                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2811                                         return 0;
2812                                 } else {
2813                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2814                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2815                                                                 " ignored due to current iWARP state\n",
2816                                                                 nesqp->hwqp.qp_id);
2817                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2818                                                 return -EINVAL;
2819                                         }
2820                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2821                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2822                                                                 " already done based on hw state.\n",
2823                                                                 nesqp->hwqp.qp_id);
2824                                                 issue_modify_qp = 0;
2825                                         }
2826                                         switch (nesqp->hw_iwarp_state) {
2827                                                 case NES_AEQE_IWARP_STATE_CLOSING:
2828                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2829                                                         break;
2830                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
2831                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2832                                                         break;
2833                                                 case NES_AEQE_IWARP_STATE_ERROR:
2834                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2835                                                         break;
2836                                                 default:
2837                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
2838                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
2839                                                         break;
2840                                         }
2841                                 }
2842                                 break;
2843                         case IB_QPS_SQE:
2844                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
2845                                                 nesqp->hwqp.qp_id);
2846                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
2847                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2848                                         return -EINVAL;
2849                                 }
2850                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2851                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
2852                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
2853                                 issue_modify_qp = 1;
2854                                 break;
2855                         case IB_QPS_ERR:
2856                         case IB_QPS_RESET:
2857                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
2858                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2859                                         return -EINVAL;
2860                                 }
2861                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
2862                                                 nesqp->hwqp.qp_id);
2863                                 if (nesqp->term_flags)
2864                                         del_timer(&nesqp->terminate_timer);
2865
2866                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
2867                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
2868                                         if (nesqp->hte_added) {
2869                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
2870                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
2871                                                 nesqp->hte_added = 0;
2872                                         }
2873                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
2874                                                 (nesdev->iw_status) &&
2875                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
2876                                         next_iwarp_state |= NES_CQP_QP_RESET;
2877                                 } else {
2878                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
2879                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
2880                                         dont_wait = 1;
2881                                 }
2882                                 issue_modify_qp = 1;
2883                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
2884                                 break;
2885                         default:
2886                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2887                                 return -EINVAL;
2888                                 break;
2889                 }
2890
2891                 nesqp->ibqp_state = attr->qp_state;
2892                 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
2893                 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
2894                                 nesqp->iwarp_state);
2895         }
2896
2897         if (attr_mask & IB_QP_ACCESS_FLAGS) {
2898                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
2899                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2900                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
2901                         issue_modify_qp = 1;
2902                 }
2903                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
2904                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
2905                         issue_modify_qp = 1;
2906                 }
2907                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
2908                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
2909                         issue_modify_qp = 1;
2910                 }
2911                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
2912                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
2913                         issue_modify_qp = 1;
2914                 }
2915
2916                 if (nesqp->user_mode) {
2917                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
2918                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
2919                         issue_modify_qp = 1;
2920                 }
2921         }
2922
2923         original_last_aeq = nesqp->last_aeq;
2924         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2925
2926         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
2927
2928         ret = 0;
2929
2930
2931         if (issue_modify_qp) {
2932                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
2933                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
2934                 if (ret)
2935                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
2936                                         " failed for QP%u.\n",
2937                                         next_iwarp_state, nesqp->hwqp.qp_id);
2938
2939         }
2940
2941         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
2942                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
2943                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2944                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2945                                 original_last_aeq, nesqp->last_aeq);
2946                 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
2947                         if (dont_wait) {
2948                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
2949                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
2950                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2951                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2952                                                         original_last_aeq, nesqp->last_aeq);
2953                                         /* this one is for the cm_disconnect thread */
2954                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
2955                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
2956                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
2957                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2958                                         nes_cm_disconn(nesqp);
2959                                 } else {
2960                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
2961                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2962                                 }
2963                         } else {
2964                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
2965                                 if (nesqp->cm_id) {
2966                                         /* These two are for the timer thread */
2967                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
2968                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
2969                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2970                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
2971                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
2972                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2973                                                                 original_last_aeq, nesqp->last_aeq);
2974                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
2975                                         }
2976                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2977                                 } else {
2978                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2979                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
2980                                                         " need ae to finish up, original_last_aeq = 0x%04X."
2981                                                         " last_aeq = 0x%04X.\n",
2982                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2983                                                         original_last_aeq, nesqp->last_aeq);
2984                                 }
2985                         }
2986                 } else {
2987                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2988                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2989                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2990                                         original_last_aeq, nesqp->last_aeq);
2991                 }
2992         } else {
2993                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
2994                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
2995                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
2996                                 original_last_aeq, nesqp->last_aeq);
2997         }
2998
2999         err = 0;
3000
3001         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3002                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3003
3004         return err;
3005 }
3006
3007
3008 /**
3009  * nes_muticast_attach
3010  */
3011 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3012 {
3013         nes_debug(NES_DBG_INIT, "\n");
3014         return -ENOSYS;
3015 }
3016
3017
3018 /**
3019  * nes_multicast_detach
3020  */
3021 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3022 {
3023         nes_debug(NES_DBG_INIT, "\n");
3024         return -ENOSYS;
3025 }
3026
3027
3028 /**
3029  * nes_process_mad
3030  */
3031 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3032                 u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh,
3033                 const struct ib_mad_hdr *in, size_t in_mad_size,
3034                 struct ib_mad_hdr *out, size_t *out_mad_size,
3035                 u16 *out_mad_pkey_index)
3036 {
3037         nes_debug(NES_DBG_INIT, "\n");
3038         return -ENOSYS;
3039 }
3040
3041 static inline void
3042 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3043 {
3044         int sge_index;
3045         int total_payload_length = 0;
3046         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3047                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3048                         ib_wr->sg_list[sge_index].addr);
3049                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3050                         ib_wr->sg_list[sge_index].length);
3051                 if (uselkey)
3052                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3053                                                 (ib_wr->sg_list[sge_index].lkey));
3054                 else
3055                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3056
3057                 total_payload_length += ib_wr->sg_list[sge_index].length;
3058         }
3059         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3060                         total_payload_length);
3061         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3062                                 total_payload_length);
3063 }
3064
3065 /**
3066  * nes_post_send
3067  */
3068 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3069                 struct ib_send_wr **bad_wr)
3070 {
3071         u64 u64temp;
3072         unsigned long flags = 0;
3073         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3074         struct nes_device *nesdev = nesvnic->nesdev;
3075         struct nes_qp *nesqp = to_nesqp(ibqp);
3076         struct nes_hw_qp_wqe *wqe;
3077         int err = 0;
3078         u32 qsize = nesqp->hwqp.sq_size;
3079         u32 head;
3080         u32 wqe_misc = 0;
3081         u32 wqe_count = 0;
3082         u32 counter;
3083
3084         if (nesqp->ibqp_state > IB_QPS_RTS) {
3085                 err = -EINVAL;
3086                 goto out;
3087         }
3088
3089         spin_lock_irqsave(&nesqp->lock, flags);
3090
3091         head = nesqp->hwqp.sq_head;
3092
3093         while (ib_wr) {
3094                 /* Check for QP error */
3095                 if (nesqp->term_flags) {
3096                         err = -EINVAL;
3097                         break;
3098                 }
3099
3100                 /* Check for SQ overflow */
3101                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3102                         err = -ENOMEM;
3103                         break;
3104                 }
3105
3106                 wqe = &nesqp->hwqp.sq_vbase[head];
3107                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3108                                 nesqp->hwqp.qp_id, wqe, head); */
3109                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3110                 u64temp = (u64)(ib_wr->wr_id);
3111                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3112                                         u64temp);
3113                 switch (ib_wr->opcode) {
3114                 case IB_WR_SEND:
3115                 case IB_WR_SEND_WITH_INV:
3116                         if (IB_WR_SEND == ib_wr->opcode) {
3117                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3118                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3119                                 else
3120                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3121                         } else {
3122                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3123                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3124                                 else
3125                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3126
3127                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3128                                                     ib_wr->ex.invalidate_rkey);
3129                         }
3130
3131                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3132                                 err = -EINVAL;
3133                                 break;
3134                         }
3135
3136                         if (ib_wr->send_flags & IB_SEND_FENCE)
3137                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3138
3139                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3140                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3141                              (ib_wr->sg_list[0].length <= 64)) {
3142                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3143                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3144                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3145                                                     ib_wr->sg_list[0].length);
3146                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3147                         } else {
3148                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3149                         }
3150
3151                         break;
3152                 case IB_WR_RDMA_WRITE:
3153                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3154                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3155                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3156                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3157                                 err = -EINVAL;
3158                                 break;
3159                         }
3160
3161                         if (ib_wr->send_flags & IB_SEND_FENCE)
3162                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3163
3164                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3165                                             rdma_wr(ib_wr)->rkey);
3166                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3167                                             rdma_wr(ib_wr)->remote_addr);
3168
3169                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3170                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3171                              (ib_wr->sg_list[0].length <= 64)) {
3172                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3173                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3174                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3175                                                     ib_wr->sg_list[0].length);
3176                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3177                         } else {
3178                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3179                         }
3180
3181                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3182                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3183                         break;
3184                 case IB_WR_RDMA_READ:
3185                 case IB_WR_RDMA_READ_WITH_INV:
3186                         /* iWARP only supports 1 sge for RDMA reads */
3187                         if (ib_wr->num_sge > 1) {
3188                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3189                                           ib_wr->num_sge);
3190                                 err = -EINVAL;
3191                                 break;
3192                         }
3193                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3194                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3195                         } else {
3196                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3197                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3198                                                     ib_wr->ex.invalidate_rkey);
3199                         }
3200
3201                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3202                                             rdma_wr(ib_wr)->remote_addr);
3203                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3204                                             rdma_wr(ib_wr)->rkey);
3205                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3206                                             ib_wr->sg_list->length);
3207                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3208                                             ib_wr->sg_list->addr);
3209                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3210                                             ib_wr->sg_list->lkey);
3211                         break;
3212                 case IB_WR_LOCAL_INV:
3213                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3214                         set_wqe_32bit_value(wqe->wqe_words,
3215                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3216                                             ib_wr->ex.invalidate_rkey);
3217                         break;
3218                 case IB_WR_REG_MR:
3219                 {
3220                         struct nes_mr *mr = to_nesmr(reg_wr(ib_wr)->mr);
3221                         int page_shift = ilog2(reg_wr(ib_wr)->mr->page_size);
3222                         int flags = reg_wr(ib_wr)->access;
3223
3224                         if (mr->npages > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3225                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3226                                 err = -EINVAL;
3227                                 break;
3228                         }
3229                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3230                         set_wqe_64bit_value(wqe->wqe_words,
3231                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3232                                             mr->ibmr.iova);
3233                         set_wqe_32bit_value(wqe->wqe_words,
3234                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3235                                             lower_32_bits(mr->ibmr.length));
3236                         set_wqe_32bit_value(wqe->wqe_words,
3237                                             NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3238                         set_wqe_32bit_value(wqe->wqe_words,
3239                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3240                                             reg_wr(ib_wr)->key);
3241
3242                         if (page_shift == 12) {
3243                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3244                         } else if (page_shift == 21) {
3245                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3246                         } else {
3247                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3248                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3249                                 err = -EINVAL;
3250                                 break;
3251                         }
3252
3253                         /* Set access_flags */
3254                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3255                         if (flags & IB_ACCESS_LOCAL_WRITE)
3256                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3257
3258                         if (flags & IB_ACCESS_REMOTE_WRITE)
3259                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3260
3261                         if (flags & IB_ACCESS_REMOTE_READ)
3262                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3263
3264                         if (flags & IB_ACCESS_MW_BIND)
3265                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3266
3267                         /* Fill in PBL info: */
3268                         set_wqe_64bit_value(wqe->wqe_words,
3269                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3270                                             mr->paddr);
3271
3272                         set_wqe_32bit_value(wqe->wqe_words,
3273                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3274                                             mr->npages * 8);
3275
3276                         nes_debug(NES_DBG_IW_TX, "SQ_REG_MR: iova_start: %llx, "
3277                                   "length: %lld, rkey: %0x, pgl_paddr: %llx, "
3278                                   "page_list_len: %u, wqe_misc: %x\n",
3279                                   (unsigned long long) mr->ibmr.iova,
3280                                   mr->ibmr.length,
3281                                   reg_wr(ib_wr)->key,
3282                                   (unsigned long long) mr->paddr,
3283                                   mr->npages,
3284                                   wqe_misc);
3285                         break;
3286                 }
3287                 default:
3288                         /* error */
3289                         err = -EINVAL;
3290                         break;
3291                 }
3292
3293                 if (err)
3294                         break;
3295
3296                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3297                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3298
3299                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3300
3301                 ib_wr = ib_wr->next;
3302                 head++;
3303                 wqe_count++;
3304                 if (head >= qsize)
3305                         head = 0;
3306
3307         }
3308
3309         nesqp->hwqp.sq_head = head;
3310         barrier();
3311         while (wqe_count) {
3312                 counter = min(wqe_count, ((u32)255));
3313                 wqe_count -= counter;
3314                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3315                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3316         }
3317
3318         spin_unlock_irqrestore(&nesqp->lock, flags);
3319
3320 out:
3321         if (err)
3322                 *bad_wr = ib_wr;
3323         return err;
3324 }
3325
3326
3327 /**
3328  * nes_post_recv
3329  */
3330 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3331                 struct ib_recv_wr **bad_wr)
3332 {
3333         u64 u64temp;
3334         unsigned long flags = 0;
3335         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3336         struct nes_device *nesdev = nesvnic->nesdev;
3337         struct nes_qp *nesqp = to_nesqp(ibqp);
3338         struct nes_hw_qp_wqe *wqe;
3339         int err = 0;
3340         int sge_index;
3341         u32 qsize = nesqp->hwqp.rq_size;
3342         u32 head;
3343         u32 wqe_count = 0;
3344         u32 counter;
3345         u32 total_payload_length;
3346
3347         if (nesqp->ibqp_state > IB_QPS_RTS) {
3348                 err = -EINVAL;
3349                 goto out;
3350         }
3351
3352         spin_lock_irqsave(&nesqp->lock, flags);
3353
3354         head = nesqp->hwqp.rq_head;
3355
3356         while (ib_wr) {
3357                 /* Check for QP error */
3358                 if (nesqp->term_flags) {
3359                         err = -EINVAL;
3360                         break;
3361                 }
3362
3363                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3364                         err = -EINVAL;
3365                         break;
3366                 }
3367                 /* Check for RQ overflow */
3368                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3369                         err = -ENOMEM;
3370                         break;
3371                 }
3372
3373                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3374                 wqe = &nesqp->hwqp.rq_vbase[head];
3375
3376                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3377                                 nesqp->hwqp.qp_id, wqe, head); */
3378                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3379                 u64temp = (u64)(ib_wr->wr_id);
3380                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3381                                         u64temp);
3382                 total_payload_length = 0;
3383                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3384                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3385                                         ib_wr->sg_list[sge_index].addr);
3386                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3387                                         ib_wr->sg_list[sge_index].length);
3388                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3389                                         ib_wr->sg_list[sge_index].lkey);
3390
3391                         total_payload_length += ib_wr->sg_list[sge_index].length;
3392                 }
3393                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3394                                         total_payload_length);
3395
3396                 ib_wr = ib_wr->next;
3397                 head++;
3398                 wqe_count++;
3399                 if (head >= qsize)
3400                         head = 0;
3401         }
3402
3403         nesqp->hwqp.rq_head = head;
3404         barrier();
3405         while (wqe_count) {
3406                 counter = min(wqe_count, ((u32)255));
3407                 wqe_count -= counter;
3408                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3409         }
3410
3411         spin_unlock_irqrestore(&nesqp->lock, flags);
3412
3413 out:
3414         if (err)
3415                 *bad_wr = ib_wr;
3416         return err;
3417 }
3418
3419 /**
3420  * nes_drain_sq - drain sq
3421  * @ibqp: pointer to ibqp
3422  */
3423 static void nes_drain_sq(struct ib_qp *ibqp)
3424 {
3425         struct nes_qp *nesqp = to_nesqp(ibqp);
3426
3427         if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
3428                 wait_for_completion(&nesqp->sq_drained);
3429 }
3430
3431 /**
3432  * nes_drain_rq - drain rq
3433  * @ibqp: pointer to ibqp
3434  */
3435 static void nes_drain_rq(struct ib_qp *ibqp)
3436 {
3437         struct nes_qp *nesqp = to_nesqp(ibqp);
3438
3439         if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
3440                 wait_for_completion(&nesqp->rq_drained);
3441 }
3442
3443 /**
3444  * nes_poll_cq
3445  */
3446 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3447 {
3448         u64 u64temp;
3449         u64 wrid;
3450         unsigned long flags = 0;
3451         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3452         struct nes_device *nesdev = nesvnic->nesdev;
3453         struct nes_cq *nescq = to_nescq(ibcq);
3454         struct nes_qp *nesqp;
3455         struct nes_hw_cqe cqe;
3456         u32 head;
3457         u32 wq_tail = 0;
3458         u32 cq_size;
3459         u32 cqe_count = 0;
3460         u32 wqe_index;
3461         u32 u32temp;
3462         u32 move_cq_head = 1;
3463         u32 err_code;
3464
3465         nes_debug(NES_DBG_CQ, "\n");
3466
3467         spin_lock_irqsave(&nescq->lock, flags);
3468
3469         head = nescq->hw_cq.cq_head;
3470         cq_size = nescq->hw_cq.cq_size;
3471
3472         while (cqe_count < num_entries) {
3473                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3474                                 NES_CQE_VALID) == 0)
3475                         break;
3476
3477                 /*
3478                  * Make sure we read CQ entry contents *after*
3479                  * we've checked the valid bit.
3480                  */
3481                 rmb();
3482
3483                 cqe = nescq->hw_cq.cq_vbase[head];
3484                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3485                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3486                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3487                 /* parse CQE, get completion context from WQE (either rq or sq) */
3488                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3489                                 ((u64)u32temp);
3490
3491                 if (u64temp) {
3492                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3493                         memset(entry, 0, sizeof *entry);
3494                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3495                                 entry->status = IB_WC_SUCCESS;
3496                         } else {
3497                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3498                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3499                                         entry->status = err_code & 0x0000ffff;
3500
3501                                         /* The rest of the cqe's will be marked as flushed */
3502                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3503                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3504                                                             NES_IWARP_CQE_MINOR_FLUSH);
3505                                 } else
3506                                         entry->status = IB_WC_WR_FLUSH_ERR;
3507                         }
3508
3509                         entry->qp = &nesqp->ibqp;
3510                         entry->src_qp = nesqp->hwqp.qp_id;
3511
3512                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3513                                 if (nesqp->skip_lsmm) {
3514                                         nesqp->skip_lsmm = 0;
3515                                         nesqp->hwqp.sq_tail++;
3516                                 }
3517
3518                                 /* Working on a SQ Completion*/
3519                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3520                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3521                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3522                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3523                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3524                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3525
3526                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3527                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3528                                         case NES_IWARP_SQ_OP_RDMAW:
3529                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3530                                                 entry->opcode = IB_WC_RDMA_WRITE;
3531                                                 break;
3532                                         case NES_IWARP_SQ_OP_RDMAR:
3533                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3534                                                 entry->opcode = IB_WC_RDMA_READ;
3535                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3536                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3537                                                 break;
3538                                         case NES_IWARP_SQ_OP_SENDINV:
3539                                         case NES_IWARP_SQ_OP_SENDSEINV:
3540                                         case NES_IWARP_SQ_OP_SEND:
3541                                         case NES_IWARP_SQ_OP_SENDSE:
3542                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3543                                                 entry->opcode = IB_WC_SEND;
3544                                                 break;
3545                                         case NES_IWARP_SQ_OP_LOCINV:
3546                                                 entry->opcode = IB_WC_LOCAL_INV;
3547                                                 break;
3548                                         case NES_IWARP_SQ_OP_FAST_REG:
3549                                                 entry->opcode = IB_WC_REG_MR;
3550                                                 break;
3551                                 }
3552
3553                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3554                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3555                                         move_cq_head = 0;
3556                                         wq_tail = nesqp->hwqp.sq_tail;
3557                                 }
3558                         } else {
3559                                 /* Working on a RQ Completion*/
3560                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3561                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3562                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3563                                         entry->opcode = IB_WC_RECV;
3564
3565                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3566                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3567                                         move_cq_head = 0;
3568                                         wq_tail = nesqp->hwqp.rq_tail;
3569                                 }
3570                         }
3571
3572                         if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
3573                                 if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
3574                                         complete(&nesqp->sq_drained);
3575                                 if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
3576                                         complete(&nesqp->rq_drained);
3577                         }
3578
3579                         entry->wr_id = wrid;
3580                         entry++;
3581                         cqe_count++;
3582                 }
3583
3584                 if (move_cq_head) {
3585                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3586                         if (++head >= cq_size)
3587                                 head = 0;
3588                         nescq->polled_completions++;
3589
3590                         if ((nescq->polled_completions > (cq_size / 2)) ||
3591                                         (nescq->polled_completions == 255)) {
3592                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3593                                         " are pending %u of %u.\n",
3594                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3595                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3596                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3597                                 nescq->polled_completions = 0;
3598                         }
3599                 } else {
3600                         /* Update the wqe index and set status to flush */
3601                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3602                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3603                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3604                                 cpu_to_le32(wqe_index);
3605                         move_cq_head = 1; /* ready for next pass */
3606                 }
3607         }
3608
3609         if (nescq->polled_completions) {
3610                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3611                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3612                 nescq->polled_completions = 0;
3613         }
3614
3615         nescq->hw_cq.cq_head = head;
3616         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3617                         cqe_count, nescq->hw_cq.cq_number);
3618
3619         spin_unlock_irqrestore(&nescq->lock, flags);
3620
3621         return cqe_count;
3622 }
3623
3624
3625 /**
3626  * nes_req_notify_cq
3627  */
3628 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3629                 {
3630         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3631         struct nes_device *nesdev = nesvnic->nesdev;
3632         struct nes_cq *nescq = to_nescq(ibcq);
3633         u32 cq_arm;
3634
3635         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3636                         nescq->hw_cq.cq_number);
3637
3638         cq_arm = nescq->hw_cq.cq_number;
3639         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3640                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3641         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3642                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3643         else
3644                 return -EINVAL;
3645
3646         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3647         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3648
3649         return 0;
3650 }
3651
3652 static int nes_port_immutable(struct ib_device *ibdev, u8 port_num,
3653                               struct ib_port_immutable *immutable)
3654 {
3655         struct ib_port_attr attr;
3656         int err;
3657
3658         immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
3659
3660         err = nes_query_port(ibdev, port_num, &attr);
3661         if (err)
3662                 return err;
3663
3664         immutable->pkey_tbl_len = attr.pkey_tbl_len;
3665         immutable->gid_tbl_len = attr.gid_tbl_len;
3666
3667         return 0;
3668 }
3669
3670 static void get_dev_fw_str(struct ib_device *dev, char *str)
3671 {
3672         struct nes_ib_device *nesibdev =
3673                         container_of(dev, struct nes_ib_device, ibdev);
3674         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3675
3676         nes_debug(NES_DBG_INIT, "\n");
3677         snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u",
3678                  (nesvnic->nesdev->nesadapter->firmware_version >> 16),
3679                  (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
3680 }
3681
3682 /**
3683  * nes_init_ofa_device
3684  */
3685 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3686 {
3687         struct nes_ib_device *nesibdev;
3688         struct nes_vnic *nesvnic = netdev_priv(netdev);
3689         struct nes_device *nesdev = nesvnic->nesdev;
3690
3691         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3692         if (nesibdev == NULL) {
3693                 return NULL;
3694         }
3695         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3696         nesibdev->ibdev.owner = THIS_MODULE;
3697
3698         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3699         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3700         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3701
3702         nesibdev->ibdev.uverbs_cmd_mask =
3703                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3704                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3705                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3706                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3707                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3708                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3709                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3710                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3711                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3712                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3713                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3714                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3715                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3716                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3717                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3718                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3719                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3720                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3721                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3722                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3723                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3724                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3725
3726         nesibdev->ibdev.phys_port_cnt = 1;
3727         nesibdev->ibdev.num_comp_vectors = 1;
3728         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3729         nesibdev->ibdev.query_device = nes_query_device;
3730         nesibdev->ibdev.query_port = nes_query_port;
3731         nesibdev->ibdev.query_pkey = nes_query_pkey;
3732         nesibdev->ibdev.query_gid = nes_query_gid;
3733         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3734         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3735         nesibdev->ibdev.mmap = nes_mmap;
3736         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3737         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3738         nesibdev->ibdev.create_ah = nes_create_ah;
3739         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3740         nesibdev->ibdev.create_qp = nes_create_qp;
3741         nesibdev->ibdev.modify_qp = nes_modify_qp;
3742         nesibdev->ibdev.query_qp = nes_query_qp;
3743         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3744         nesibdev->ibdev.create_cq = nes_create_cq;
3745         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3746         nesibdev->ibdev.poll_cq = nes_poll_cq;
3747         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3748         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3749         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3750         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3751         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3752
3753         nesibdev->ibdev.alloc_mr = nes_alloc_mr;
3754         nesibdev->ibdev.map_mr_sg = nes_map_mr_sg;
3755
3756         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3757         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3758         nesibdev->ibdev.process_mad = nes_process_mad;
3759
3760         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3761         nesibdev->ibdev.post_send = nes_post_send;
3762         nesibdev->ibdev.post_recv = nes_post_recv;
3763         nesibdev->ibdev.drain_sq = nes_drain_sq;
3764         nesibdev->ibdev.drain_rq = nes_drain_rq;
3765
3766         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3767         if (nesibdev->ibdev.iwcm == NULL) {
3768                 ib_dealloc_device(&nesibdev->ibdev);
3769                 return NULL;
3770         }
3771         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3772         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3773         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3774         nesibdev->ibdev.iwcm->connect = nes_connect;
3775         nesibdev->ibdev.iwcm->accept = nes_accept;
3776         nesibdev->ibdev.iwcm->reject = nes_reject;
3777         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3778         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3779         nesibdev->ibdev.get_port_immutable   = nes_port_immutable;
3780         nesibdev->ibdev.get_dev_fw_str   = get_dev_fw_str;
3781         memcpy(nesibdev->ibdev.iwcm->ifname, netdev->name,
3782                sizeof(nesibdev->ibdev.iwcm->ifname));
3783
3784         return nesibdev;
3785 }
3786
3787
3788 /**
3789  * nes_handle_delayed_event
3790  */
3791 static void nes_handle_delayed_event(unsigned long data)
3792 {
3793         struct nes_vnic *nesvnic = (void *) data;
3794
3795         if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3796                 struct ib_event event;
3797
3798                 event.device = &nesvnic->nesibdev->ibdev;
3799                 if (!event.device)
3800                         goto stop_timer;
3801                 event.event = nesvnic->delayed_event;
3802                 event.element.port_num = nesvnic->logical_port + 1;
3803                 ib_dispatch_event(&event);
3804         }
3805
3806 stop_timer:
3807         nesvnic->event_timer.function = NULL;
3808 }
3809
3810
3811 void  nes_port_ibevent(struct nes_vnic *nesvnic)
3812 {
3813         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3814         struct nes_device *nesdev = nesvnic->nesdev;
3815         struct ib_event event;
3816         event.device = &nesibdev->ibdev;
3817         event.element.port_num = nesvnic->logical_port + 1;
3818         event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3819
3820         if (!nesvnic->event_timer.function) {
3821                 ib_dispatch_event(&event);
3822                 nesvnic->last_dispatched_event = event.event;
3823                 nesvnic->event_timer.function = nes_handle_delayed_event;
3824                 nesvnic->event_timer.data = (unsigned long) nesvnic;
3825                 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3826                 add_timer(&nesvnic->event_timer);
3827         } else {
3828                 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3829         }
3830         nesvnic->delayed_event = event.event;
3831 }
3832
3833
3834 /**
3835  * nes_destroy_ofa_device
3836  */
3837 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3838 {
3839         if (nesibdev == NULL)
3840                 return;
3841
3842         nes_unregister_ofa_device(nesibdev);
3843
3844         kfree(nesibdev->ibdev.iwcm);
3845         ib_dealloc_device(&nesibdev->ibdev);
3846 }
3847
3848
3849 /**
3850  * nes_register_ofa_device
3851  */
3852 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3853 {
3854         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3855         struct nes_device *nesdev = nesvnic->nesdev;
3856         struct nes_adapter *nesadapter = nesdev->nesadapter;
3857         int i, ret;
3858
3859         ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
3860         if (ret) {
3861                 return ret;
3862         }
3863
3864         /* Get the resources allocated to this device */
3865         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3866         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3867         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3868         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3869
3870         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3871                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3872                 if (ret) {
3873                         while (i > 0) {
3874                                 i--;
3875                                 device_remove_file(&nesibdev->ibdev.dev,
3876                                                    nes_dev_attributes[i]);
3877                         }
3878                         ib_unregister_device(&nesibdev->ibdev);
3879                         return ret;
3880                 }
3881         }
3882
3883         nesvnic->of_device_registered = 1;
3884
3885         return 0;
3886 }
3887
3888
3889 /**
3890  * nes_unregister_ofa_device
3891  */
3892 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3893 {
3894         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3895         int i;
3896
3897         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3898                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3899         }
3900
3901         if (nesvnic->of_device_registered) {
3902                 ib_unregister_device(&nesibdev->ibdev);
3903         }
3904
3905         nesvnic->of_device_registered = 0;
3906 }