drivers/infiniband/hw/nes/nes_verbs.c

   1 /*
   2  * Copyright (c) 2006 - 2009 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
  55 /**
  56  * nes_alloc_mw
  57  */
  58 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd) {
  59         struct nes_pd *nespd = to_nespd(ibpd);
  60         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
  61         struct nes_device *nesdev = nesvnic->nesdev;
  62         struct nes_adapter *nesadapter = nesdev->nesadapter;
  63         struct nes_cqp_request *cqp_request;
  64         struct nes_mr *nesmr;
  65         struct ib_mw *ibmw;
  66         struct nes_hw_cqp_wqe *cqp_wqe;
  67         int ret;
  68         u32 stag;
  69         u32 stag_index = 0;
  70         u32 next_stag_index = 0;
  71         u32 driver_key = 0;
  72         u8 stag_key = 0;
  73
  74         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
  75         stag_key = (u8)next_stag_index;
  76
  77         driver_key = 0;
  78
  79         next_stag_index >>= 8;
  80         next_stag_index %= nesadapter->max_mr;
  81
  82         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
  83                         nesadapter->max_mr, &stag_index, &next_stag_index);
  84         if (ret) {
  85                 return ERR_PTR(ret);
  86         }
  87
  88         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
  89         if (!nesmr) {
  90                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
  91                 return ERR_PTR(-ENOMEM);
  92         }
  93
  94         stag = stag_index << 8;
  95         stag |= driver_key;
  96         stag += (u32)stag_key;
  97
  98         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
  99                         stag, stag_index);
 100
 101         /* Register the region with the adapter */
 102         cqp_request = nes_get_cqp_request(nesdev);
 103         if (cqp_request == NULL) {
 104                 kfree(nesmr);
 105                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 106                 return ERR_PTR(-ENOMEM);
 107         }
 108
 109         cqp_request->waiting = 1;
 110         cqp_wqe = &cqp_request->cqp_wqe;
 111
 112         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
 113                         cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
 114                         NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
 115                         NES_CQP_STAG_REM_ACC_EN);
 116
 117         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 118         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
 119         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 120
 121         atomic_set(&cqp_request->refcount, 2);
 122         nes_post_cqp_request(nesdev, cqp_request);
 123
 124         /* Wait for CQP */
 125         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
 126                         NES_EVENT_TIMEOUT);
 127         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
 128                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 129                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
 130         if ((!ret) || (cqp_request->major_code)) {
 131                 nes_put_cqp_request(nesdev, cqp_request);
 132                 kfree(nesmr);
 133                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 134                 if (!ret) {
 135                         return ERR_PTR(-ETIME);
 136                 } else {
 137                         return ERR_PTR(-ENOMEM);
 138                 }
 139         }
 140         nes_put_cqp_request(nesdev, cqp_request);
 141
 142         nesmr->ibmw.rkey = stag;
 143         nesmr->mode = IWNES_MEMREG_TYPE_MW;
 144         ibmw = &nesmr->ibmw;
 145         nesmr->pbl_4k = 0;
 146         nesmr->pbls_used = 0;
 147
 148         return ibmw;
 149 }
 150
 151
 152 /**
 153  * nes_dealloc_mw
 154  */
 155 static int nes_dealloc_mw(struct ib_mw *ibmw)
 156 {
 157         struct nes_mr *nesmr = to_nesmw(ibmw);
 158         struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
 159         struct nes_device *nesdev = nesvnic->nesdev;
 160         struct nes_adapter *nesadapter = nesdev->nesadapter;
 161         struct nes_hw_cqp_wqe *cqp_wqe;
 162         struct nes_cqp_request *cqp_request;
 163         int err = 0;
 164         int ret;
 165
 166         /* Deallocate the window with the adapter */
 167         cqp_request = nes_get_cqp_request(nesdev);
 168         if (cqp_request == NULL) {
 169                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 170                 return -ENOMEM;
 171         }
 172         cqp_request->waiting = 1;
 173         cqp_wqe = &cqp_request->cqp_wqe;
 174         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 175         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
 176         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
 177
 178         atomic_set(&cqp_request->refcount, 2);
 179         nes_post_cqp_request(nesdev, cqp_request);
 180
 181         /* Wait for CQP */
 182         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
 183                         ibmw->rkey);
 184         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
 185                         NES_EVENT_TIMEOUT);
 186         nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
 187                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 188                         ret, cqp_request->major_code, cqp_request->minor_code);
 189         if (!ret)
 190                 err = -ETIME;
 191         else if (cqp_request->major_code)
 192                 err = -EIO;
 193
 194         nes_put_cqp_request(nesdev, cqp_request);
 195
 196         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
 197                         (ibmw->rkey & 0x0fffff00) >> 8);
 198         kfree(nesmr);
 199
 200         return err;
 201 }
 202
 203
 204 /**
 205  * nes_bind_mw
 206  */
 207 static int nes_bind_mw(struct ib_qp *ibqp, struct ib_mw *ibmw,
 208                 struct ib_mw_bind *ibmw_bind)
 209 {
 210         u64 u64temp;
 211         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
 212         struct nes_device *nesdev = nesvnic->nesdev;
 213         /* struct nes_mr *nesmr = to_nesmw(ibmw); */
 214         struct nes_qp *nesqp = to_nesqp(ibqp);
 215         struct nes_hw_qp_wqe *wqe;
 216         unsigned long flags = 0;
 217         u32 head;
 218         u32 wqe_misc = 0;
 219         u32 qsize;
 220
 221         if (nesqp->ibqp_state > IB_QPS_RTS)
 222                 return -EINVAL;
 223
 224         spin_lock_irqsave(&nesqp->lock, flags);
 225
 226         head = nesqp->hwqp.sq_head;
 227         qsize = nesqp->hwqp.sq_tail;
 228
 229         /* Check for SQ overflow */
 230         if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
 231                 spin_unlock_irqrestore(&nesqp->lock, flags);
 232                 return -ENOMEM;
 233         }
 234
 235         wqe = &nesqp->hwqp.sq_vbase[head];
 236         /* nes_debug(NES_DBG_MR, "processing sq wqe at %p, head = %u.\n", wqe, head); */
 237         nes_fill_init_qp_wqe(wqe, nesqp, head);
 238         u64temp = ibmw_bind->wr_id;
 239         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX, u64temp);
 240         wqe_misc = NES_IWARP_SQ_OP_BIND;
 241
 242         wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
 243
 244         if (ibmw_bind->send_flags & IB_SEND_SIGNALED)
 245                 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
 246
 247         if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_WRITE) {
 248                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE;
 249         }
 250         if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_READ) {
 251                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_READ;
 252         }
 253
 254         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_MISC_IDX, wqe_misc);
 255         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MR_IDX, ibmw_bind->mr->lkey);
 256         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MW_IDX, ibmw->rkey);
 257         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_LENGTH_LOW_IDX,
 258                         ibmw_bind->length);
 259         wqe->wqe_words[NES_IWARP_SQ_BIND_WQE_LENGTH_HIGH_IDX] = 0;
 260         u64temp = (u64)ibmw_bind->addr;
 261         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_VA_FBO_LOW_IDX, u64temp);
 262
 263         head++;
 264         if (head >= qsize)
 265                 head = 0;
 266
 267         nesqp->hwqp.sq_head = head;
 268         barrier();
 269
 270         nes_write32(nesdev->regs+NES_WQE_ALLOC,
 271                         (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
 272
 273         spin_unlock_irqrestore(&nesqp->lock, flags);
 274
 275         return 0;
 276 }
 277
 278
 279 /*
 280  * nes_alloc_fast_mr
 281  */
 282 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
 283                              u32 stag, u32 page_count)
 284 {
 285         struct nes_hw_cqp_wqe *cqp_wqe;
 286         struct nes_cqp_request *cqp_request;
 287         unsigned long flags;
 288         int ret;
 289         struct nes_adapter *nesadapter = nesdev->nesadapter;
 290         u32 opcode = 0;
 291         u16 major_code;
 292         u64 region_length = page_count * PAGE_SIZE;
 293
 294
 295         cqp_request = nes_get_cqp_request(nesdev);
 296         if (cqp_request == NULL) {
 297                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 298                 return -ENOMEM;
 299         }
 300         nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
 301                               "region_length = %llu\n",
 302                               page_count, region_length);
 303         cqp_request->waiting = 1;
 304         cqp_wqe = &cqp_request->cqp_wqe;
 305
 306         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 307         if (nesadapter->free_4kpbl > 0) {
 308                 nesadapter->free_4kpbl--;
 309                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 310         } else {
 311                 /* No 4kpbl's available: */
 312                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 313                 nes_debug(NES_DBG_MR, "Out of Pbls\n");
 314                 nes_free_cqp_request(nesdev, cqp_request);
 315                 return -ENOMEM;
 316         }
 317
 318         opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
 319                  NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
 320                  NES_CQP_STAG_REM_ACC_EN;
 321         /*
 322          * The current OFED API does not support the zero based TO option.
 323          * If added then need to changed the NES_CQP_STAG_VA* option.  Also,
 324          * the API does not support that ability to have the MR set for local
 325          * access only when created and not allow the SQ op to override. Given
 326          * this the remote enable must be set here.
 327          */
 328
 329         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 330         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 331         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
 332
 333         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
 334                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
 335         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
 336                         cpu_to_le32(nespd->pd_id & 0x00007fff);
 337
 338         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 339         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
 340         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
 341         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
 342         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
 343         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
 344         barrier();
 345
 346         atomic_set(&cqp_request->refcount, 2);
 347         nes_post_cqp_request(nesdev, cqp_request);
 348
 349         /* Wait for CQP */
 350         ret = wait_event_timeout(cqp_request->waitq,
 351                                  (0 != cqp_request->request_done),
 352                                  NES_EVENT_TIMEOUT);
 353
 354         nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
 355                   "wait_event_timeout ret = %u, CQP Major:Minor codes = "
 356                   "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
 357                   cqp_request->minor_code);
 358         major_code = cqp_request->major_code;
 359         nes_put_cqp_request(nesdev, cqp_request);
 360
 361         if (!ret || major_code) {
 362                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 363                 nesadapter->free_4kpbl++;
 364                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 365         }
 366
 367         if (!ret)
 368                 return -ETIME;
 369         else if (major_code)
 370                 return -EIO;
 371         return 0;
 372 }
 373
 374 /*
 375  * nes_alloc_fast_reg_mr
 376  */
 377 static struct ib_mr *nes_alloc_fast_reg_mr(struct ib_pd *ibpd, int max_page_list_len)
 378 {
 379         struct nes_pd *nespd = to_nespd(ibpd);
 380         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 381         struct nes_device *nesdev = nesvnic->nesdev;
 382         struct nes_adapter *nesadapter = nesdev->nesadapter;
 383
 384         u32 next_stag_index;
 385         u8 stag_key = 0;
 386         u32 driver_key = 0;
 387         int err = 0;
 388         u32 stag_index = 0;
 389         struct nes_mr *nesmr;
 390         u32 stag;
 391         int ret;
 392         struct ib_mr *ibmr;
 393 /*
 394  * Note:  Set to always use a fixed length single page entry PBL.  This is to allow
 395  *       for the fast_reg_mr operation to always know the size of the PBL.
 396  */
 397         if (max_page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 398                 return ERR_PTR(-E2BIG);
 399
 400         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
 401         stag_key = (u8)next_stag_index;
 402         next_stag_index >>= 8;
 403         next_stag_index %= nesadapter->max_mr;
 404
 405         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
 406                                  nesadapter->max_mr, &stag_index,
 407                                  &next_stag_index);
 408         if (err)
 409                 return ERR_PTR(err);
 410
 411         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
 412         if (!nesmr) {
 413                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 414                 return ERR_PTR(-ENOMEM);
 415         }
 416
 417         stag = stag_index << 8;
 418         stag |= driver_key;
 419         stag += (u32)stag_key;
 420
 421         nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
 422                   stag, stag_index);
 423
 424         ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_page_list_len);
 425
 426         if (ret == 0) {
 427                 nesmr->ibmr.rkey = stag;
 428                 nesmr->ibmr.lkey = stag;
 429                 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
 430                 ibmr = &nesmr->ibmr;
 431         } else {
 432                 kfree(nesmr);
 433                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 434                 ibmr = ERR_PTR(-ENOMEM);
 435         }
 436         return ibmr;
 437 }
 438
 439 /*
 440  * nes_alloc_fast_reg_page_list
 441  */
 442 static struct ib_fast_reg_page_list *nes_alloc_fast_reg_page_list(
 443                                                         struct ib_device *ibdev,
 444                                                         int page_list_len)
 445 {
 446         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 447         struct nes_device *nesdev = nesvnic->nesdev;
 448         struct ib_fast_reg_page_list *pifrpl;
 449         struct nes_ib_fast_reg_page_list *pnesfrpl;
 450
 451         if (page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 452                 return ERR_PTR(-E2BIG);
 453         /*
 454          * Allocate the ib_fast_reg_page_list structure, the
 455          * nes_fast_bpl structure, and the PLB table.
 456          */
 457         pnesfrpl = kmalloc(sizeof(struct nes_ib_fast_reg_page_list) +
 458                            page_list_len * sizeof(u64), GFP_KERNEL);
 459
 460         if (!pnesfrpl)
 461                 return ERR_PTR(-ENOMEM);
 462
 463         pifrpl = &pnesfrpl->ibfrpl;
 464         pifrpl->page_list = &pnesfrpl->pbl;
 465         pifrpl->max_page_list_len = page_list_len;
 466         /*
 467          * Allocate the WQE PBL
 468          */
 469         pnesfrpl->nes_wqe_pbl.kva = pci_alloc_consistent(nesdev->pcidev,
 470                                                          page_list_len * sizeof(u64),
 471                                                          &pnesfrpl->nes_wqe_pbl.paddr);
 472
 473         if (!pnesfrpl->nes_wqe_pbl.kva) {
 474                 kfree(pnesfrpl);
 475                 return ERR_PTR(-ENOMEM);
 476         }
 477         nes_debug(NES_DBG_MR, "nes_alloc_fast_reg_pbl: nes_frpl = %p, "
 478                   "ibfrpl = %p, ibfrpl.page_list = %p, pbl.kva = %p, "
 479                   "pbl.paddr = %llx\n", pnesfrpl, &pnesfrpl->ibfrpl,
 480                   pnesfrpl->ibfrpl.page_list, pnesfrpl->nes_wqe_pbl.kva,
 481                   (unsigned long long) pnesfrpl->nes_wqe_pbl.paddr);
 482
 483         return pifrpl;
 484 }
 485
 486 /*
 487  * nes_free_fast_reg_page_list
 488  */
 489 static void nes_free_fast_reg_page_list(struct ib_fast_reg_page_list *pifrpl)
 490 {
 491         struct nes_vnic *nesvnic = to_nesvnic(pifrpl->device);
 492         struct nes_device *nesdev = nesvnic->nesdev;
 493         struct nes_ib_fast_reg_page_list *pnesfrpl;
 494
 495         pnesfrpl = container_of(pifrpl, struct nes_ib_fast_reg_page_list, ibfrpl);
 496         /*
 497          * Free the WQE PBL.
 498          */
 499         pci_free_consistent(nesdev->pcidev,
 500                             pifrpl->max_page_list_len * sizeof(u64),
 501                             pnesfrpl->nes_wqe_pbl.kva,
 502                             pnesfrpl->nes_wqe_pbl.paddr);
 503         /*
 504          * Free the PBL structure
 505          */
 506         kfree(pnesfrpl);
 507 }
 508
 509 /**
 510  * nes_query_device
 511  */
 512 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 513 {
 514         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 515         struct nes_device *nesdev = nesvnic->nesdev;
 516         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 517
 518         memset(props, 0, sizeof(*props));
 519         memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
 520
 521         props->fw_ver = nesdev->nesadapter->firmware_version;
 522         props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
 523         props->vendor_id = nesdev->nesadapter->vendor_id;
 524         props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
 525         props->hw_ver = nesdev->nesadapter->hw_rev;
 526         props->max_mr_size = 0x80000000;
 527         props->max_qp = nesibdev->max_qp;
 528         props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 529         props->max_sge = nesdev->nesadapter->max_sge;
 530         props->max_cq = nesibdev->max_cq;
 531         props->max_cqe = nesdev->nesadapter->max_cqe;
 532         props->max_mr = nesibdev->max_mr;
 533         props->max_mw = nesibdev->max_mr;
 534         props->max_pd = nesibdev->max_pd;
 535         props->max_sge_rd = 1;
 536         switch (nesdev->nesadapter->max_irrq_wr) {
 537                 case 0:
 538                         props->max_qp_rd_atom = 2;
 539                         break;
 540                 case 1:
 541                         props->max_qp_rd_atom = 8;
 542                         break;
 543                 case 2:
 544                         props->max_qp_rd_atom = 32;
 545                         break;
 546                 case 3:
 547                         props->max_qp_rd_atom = 64;
 548                         break;
 549                 default:
 550                         props->max_qp_rd_atom = 0;
 551         }
 552         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 553         props->atomic_cap = IB_ATOMIC_NONE;
 554         props->max_map_per_fmr = 1;
 555
 556         return 0;
 557 }
 558
 559
 560 /**
 561  * nes_query_port
 562  */
 563 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 564 {
 565         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 566         struct net_device *netdev = nesvnic->netdev;
 567
 568         memset(props, 0, sizeof(*props));
 569
 570         props->max_mtu = IB_MTU_4096;
 571
 572         if (netdev->mtu  >= 4096)
 573                 props->active_mtu = IB_MTU_4096;
 574         else if (netdev->mtu  >= 2048)
 575                 props->active_mtu = IB_MTU_2048;
 576         else if (netdev->mtu  >= 1024)
 577                 props->active_mtu = IB_MTU_1024;
 578         else if (netdev->mtu  >= 512)
 579                 props->active_mtu = IB_MTU_512;
 580         else
 581                 props->active_mtu = IB_MTU_256;
 582
 583         props->lid = 1;
 584         props->lmc = 0;
 585         props->sm_lid = 0;
 586         props->sm_sl = 0;
 587         if (netif_queue_stopped(netdev))
 588                 props->state = IB_PORT_DOWN;
 589         else if (nesvnic->linkup)
 590                 props->state = IB_PORT_ACTIVE;
 591         else
 592                 props->state = IB_PORT_DOWN;
 593         props->phys_state = 0;
 594         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 595                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 596         props->gid_tbl_len = 1;
 597         props->pkey_tbl_len = 1;
 598         props->qkey_viol_cntr = 0;
 599         props->active_width = IB_WIDTH_4X;
 600         props->active_speed = 1;
 601         props->max_msg_sz = 0x80000000;
 602
 603         return 0;
 604 }
 605
 606
 607 /**
 608  * nes_query_pkey
 609  */
 610 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 611 {
 612         *pkey = 0;
 613         return 0;
 614 }
 615
 616
 617 /**
 618  * nes_query_gid
 619  */
 620 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 621                 int index, union ib_gid *gid)
 622 {
 623         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 624
 625         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 626         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 627
 628         return 0;
 629 }
 630
 631
 632 /**
 633  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 634  * of all objects associated with a particular user-mode client.
 635  */
 636 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 637                 struct ib_udata *udata)
 638 {
 639         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 640         struct nes_device *nesdev = nesvnic->nesdev;
 641         struct nes_adapter *nesadapter = nesdev->nesadapter;
 642         struct nes_alloc_ucontext_req req;
 643         struct nes_alloc_ucontext_resp uresp;
 644         struct nes_ucontext *nes_ucontext;
 645         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 646
 647
 648         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 649                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 650                 return ERR_PTR(-EINVAL);
 651         }
 652
 653         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 654                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 655                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 656                 return ERR_PTR(-EINVAL);
 657         }
 658
 659
 660         memset(&uresp, 0, sizeof uresp);
 661
 662         uresp.max_qps = nesibdev->max_qp;
 663         uresp.max_pds = nesibdev->max_pd;
 664         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 665         uresp.virtwq = nesadapter->virtwq;
 666         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 667
 668         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 669         if (!nes_ucontext)
 670                 return ERR_PTR(-ENOMEM);
 671
 672         nes_ucontext->nesdev = nesdev;
 673         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 674         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 675                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 676                         PAGE_SIZE;
 677
 678
 679         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 680                 kfree(nes_ucontext);
 681                 return ERR_PTR(-EFAULT);
 682         }
 683
 684         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 685         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 686         atomic_set(&nes_ucontext->usecnt, 1);
 687         return &nes_ucontext->ibucontext;
 688 }
 689
 690
 691 /**
 692  * nes_dealloc_ucontext
 693  */
 694 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 695 {
 696         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 697         /* struct nes_device *nesdev = nesvnic->nesdev; */
 698         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 699
 700         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 701           return 0;
 702         kfree(nes_ucontext);
 703         return 0;
 704 }
 705
 706
 707 /**
 708  * nes_mmap
 709  */
 710 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 711 {
 712         unsigned long index;
 713         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 714         struct nes_device *nesdev = nesvnic->nesdev;
 715         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 716         struct nes_ucontext *nes_ucontext;
 717         struct nes_qp *nesqp;
 718
 719         nes_ucontext = to_nesucontext(context);
 720
 721
 722         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 723                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 724                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 725                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 726                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 727                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 728                         return -EFAULT;
 729                 }
 730                 nesqp = nes_ucontext->mmap_nesqp[index];
 731                 if (nesqp == NULL) {
 732                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 733                         return -EFAULT;
 734                 }
 735                 if (remap_pfn_range(vma, vma->vm_start,
 736                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 737                                 vma->vm_end - vma->vm_start,
 738                                 vma->vm_page_prot)) {
 739                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 740                         return -EAGAIN;
 741                 }
 742                 vma->vm_private_data = nesqp;
 743                 return 0;
 744         } else {
 745                 index = vma->vm_pgoff;
 746                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 747                         return -EFAULT;
 748
 749                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 750                 if (io_remap_pfn_range(vma, vma->vm_start,
 751                                 (nesdev->doorbell_start +
 752                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 753                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 754                         return -EAGAIN;
 755                 vma->vm_private_data = nes_ucontext;
 756                 return 0;
 757         }
 758
 759         return -ENOSYS;
 760 }
 761
 762
 763 /**
 764  * nes_alloc_pd
 765  */
 766 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 767                 struct ib_ucontext *context, struct ib_udata *udata)
 768 {
 769         struct nes_pd *nespd;
 770         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 771         struct nes_device *nesdev = nesvnic->nesdev;
 772         struct nes_adapter *nesadapter = nesdev->nesadapter;
 773         struct nes_ucontext *nesucontext;
 774         struct nes_alloc_pd_resp uresp;
 775         u32 pd_num = 0;
 776         int err;
 777
 778         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 779                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 780                         netdev_refcnt_read(nesvnic->netdev));
 781
 782         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 783                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd);
 784         if (err) {
 785                 return ERR_PTR(err);
 786         }
 787
 788         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 789         if (!nespd) {
 790                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 791                 return ERR_PTR(-ENOMEM);
 792         }
 793
 794         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 795                         nespd, nesvnic->nesibdev->ibdev.name);
 796
 797         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 798
 799         if (context) {
 800                 nesucontext = to_nesucontext(context);
 801                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 802                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 803                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 804                                 nespd->mmap_db_index, nespd->pd_id);
 805                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 806                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 807                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 808                         kfree(nespd);
 809                         return ERR_PTR(-ENOMEM);
 810                 }
 811
 812                 uresp.pd_id = nespd->pd_id;
 813                 uresp.mmap_db_index = nespd->mmap_db_index;
 814                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 815                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 816                         kfree(nespd);
 817                         return ERR_PTR(-EFAULT);
 818                 }
 819
 820                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 821                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 822                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 823         }
 824
 825         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 826         return &nespd->ibpd;
 827 }
 828
 829
 830 /**
 831  * nes_dealloc_pd
 832  */
 833 static int nes_dealloc_pd(struct ib_pd *ibpd)
 834 {
 835         struct nes_ucontext *nesucontext;
 836         struct nes_pd *nespd = to_nespd(ibpd);
 837         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 838         struct nes_device *nesdev = nesvnic->nesdev;
 839         struct nes_adapter *nesadapter = nesdev->nesadapter;
 840
 841         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 842                 nesucontext = to_nesucontext(ibpd->uobject->context);
 843                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 844                                 nespd->mmap_db_index);
 845                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 846                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 847                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 848                         nesucontext->first_free_db = nespd->mmap_db_index;
 849                 }
 850         }
 851
 852         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 853                         nespd->pd_id, nespd);
 854         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 855                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 856         kfree(nespd);
 857
 858         return 0;
 859 }
 860
 861
 862 /**
 863  * nes_create_ah
 864  */
 865 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 866 {
 867         return ERR_PTR(-ENOSYS);
 868 }
 869
 870
 871 /**
 872  * nes_destroy_ah
 873  */
 874 static int nes_destroy_ah(struct ib_ah *ah)
 875 {
 876         return -ENOSYS;
 877 }
 878
 879
 880 /**
 881  * nes_get_encoded_size
 882  */
 883 static inline u8 nes_get_encoded_size(int *size)
 884 {
 885         u8 encoded_size = 0;
 886         if (*size <= 32) {
 887                 *size = 32;
 888                 encoded_size = 1;
 889         } else if (*size <= 128) {
 890                 *size = 128;
 891                 encoded_size = 2;
 892         } else if (*size <= 512) {
 893                 *size = 512;
 894                 encoded_size = 3;
 895         }
 896         return (encoded_size);
 897 }
 898
 899
 900
 901 /**
 902  * nes_setup_virt_qp
 903  */
 904 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 905                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 906 {
 907         unsigned long flags;
 908         void *mem;
 909         __le64 *pbl = NULL;
 910         __le64 *tpbl;
 911         __le64 *pblbuffer;
 912         struct nes_device *nesdev = nesvnic->nesdev;
 913         struct nes_adapter *nesadapter = nesdev->nesadapter;
 914         u32 pbl_entries;
 915         u8 rq_pbl_entries;
 916         u8 sq_pbl_entries;
 917
 918         pbl_entries = nespbl->pbl_size >> 3;
 919         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 920                         nespbl->pbl_size, pbl_entries,
 921                         (void *)nespbl->pbl_vbase,
 922                         (unsigned long) nespbl->pbl_pbase);
 923         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 924         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 925         /* the first pbl to be fro the rq_vbase... */
 926         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 927         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 928         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 929         if (!nespbl->page) {
 930                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 931                 kfree(nespbl);
 932                 return -ENOMEM;
 933         }
 934
 935         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 936         nesqp->page = nespbl->page;
 937         if (!nesqp->hwqp.sq_vbase) {
 938                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 939                 kfree(nespbl);
 940                 return -ENOMEM;
 941         }
 942
 943         /* Now to get to sq.. we need to calculate how many */
 944         /* PBL entries were used by the rq.. */
 945         pbl += sq_pbl_entries;
 946         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 947         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 948         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 949
 950         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 951                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 952                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 953         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 954         if (!nesadapter->free_256pbl) {
 955                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 956                                 nespbl->pbl_pbase);
 957                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 958                 kunmap(nesqp->page);
 959                 kfree(nespbl);
 960                 return -ENOMEM;
 961         }
 962         nesadapter->free_256pbl--;
 963         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 964
 965         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 966         pblbuffer = nesqp->pbl_vbase;
 967         if (!nesqp->pbl_vbase) {
 968                 /* memory allocated during nes_reg_user_mr() */
 969                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 970                                     nespbl->pbl_pbase);
 971                 kfree(nespbl);
 972                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 973                 nesadapter->free_256pbl++;
 974                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 975                 kunmap(nesqp->page);
 976                 return -ENOMEM;
 977         }
 978         memset(nesqp->pbl_vbase, 0, 256);
 979         /* fill in the page address in the pbl buffer.. */
 980         tpbl = pblbuffer + 16;
 981         pbl = (__le64 *)nespbl->pbl_vbase;
 982         while (sq_pbl_entries--)
 983                 *tpbl++ = *pbl++;
 984         tpbl = pblbuffer;
 985         while (rq_pbl_entries--)
 986                 *tpbl++ = *pbl++;
 987
 988         /* done with memory allocated during nes_reg_user_mr() */
 989         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 990                             nespbl->pbl_pbase);
 991         kfree(nespbl);
 992
 993         nesqp->qp_mem_size =
 994                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
 995         /* Round up to a multiple of a page */
 996         nesqp->qp_mem_size += PAGE_SIZE - 1;
 997         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
 998
 999         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1000                         &nesqp->hwqp.q2_pbase);
1001
1002         if (!mem) {
1003                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
1004                 nesqp->pbl_vbase = NULL;
1005                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1006                 nesadapter->free_256pbl++;
1007                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1008                 kunmap(nesqp->page);
1009                 return -ENOMEM;
1010         }
1011         nesqp->sq_kmapped = 1;
1012         nesqp->hwqp.q2_vbase = mem;
1013         mem += 256;
1014         memset(nesqp->hwqp.q2_vbase, 0, 256);
1015         nesqp->nesqp_context = mem;
1016         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1017         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1018
1019         return 0;
1020 }
1021
1022
1023 /**
1024  * nes_setup_mmap_qp
1025  */
1026 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
1027                 int sq_size, int rq_size)
1028 {
1029         void *mem;
1030         struct nes_device *nesdev = nesvnic->nesdev;
1031
1032         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
1033                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
1034                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
1035                         256; /* this is Q2 */
1036         /* Round up to a multiple of a page */
1037         nesqp->qp_mem_size += PAGE_SIZE - 1;
1038         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1039
1040         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1041                         &nesqp->hwqp.sq_pbase);
1042         if (!mem)
1043                 return -ENOMEM;
1044         nes_debug(NES_DBG_QP, "PCI consistent memory for "
1045                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
1046                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
1047
1048         memset(mem, 0, nesqp->qp_mem_size);
1049
1050         nesqp->hwqp.sq_vbase = mem;
1051         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
1052
1053         nesqp->hwqp.rq_vbase = mem;
1054         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
1055                         sizeof(struct nes_hw_qp_wqe) * sq_size;
1056         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
1057
1058         nesqp->hwqp.q2_vbase = mem;
1059         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
1060                         sizeof(struct nes_hw_qp_wqe) * rq_size;
1061         mem += 256;
1062         memset(nesqp->hwqp.q2_vbase, 0, 256);
1063
1064         nesqp->nesqp_context = mem;
1065         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1066         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1067         return 0;
1068 }
1069
1070
1071 /**
1072  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
1073  */
1074 static inline void nes_free_qp_mem(struct nes_device *nesdev,
1075                 struct nes_qp *nesqp, int virt_wqs)
1076 {
1077         unsigned long flags;
1078         struct nes_adapter *nesadapter = nesdev->nesadapter;
1079         if (!virt_wqs) {
1080                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1081                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
1082         }else {
1083                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1084                 nesadapter->free_256pbl++;
1085                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1086                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
1087                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
1088                 nesqp->pbl_vbase = NULL;
1089                 if (nesqp->sq_kmapped) {
1090                         nesqp->sq_kmapped = 0;
1091                         kunmap(nesqp->page);
1092                 }
1093         }
1094 }
1095
1096
1097 /**
1098  * nes_create_qp
1099  */
1100 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1101                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1102 {
1103         u64 u64temp= 0;
1104         u64 u64nesqp = 0;
1105         struct nes_pd *nespd = to_nespd(ibpd);
1106         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1107         struct nes_device *nesdev = nesvnic->nesdev;
1108         struct nes_adapter *nesadapter = nesdev->nesadapter;
1109         struct nes_qp *nesqp;
1110         struct nes_cq *nescq;
1111         struct nes_ucontext *nes_ucontext;
1112         struct nes_hw_cqp_wqe *cqp_wqe;
1113         struct nes_cqp_request *cqp_request;
1114         struct nes_create_qp_req req;
1115         struct nes_create_qp_resp uresp;
1116         struct nes_pbl  *nespbl = NULL;
1117         u32 qp_num = 0;
1118         u32 opcode = 0;
1119         /* u32 counter = 0; */
1120         void *mem;
1121         unsigned long flags;
1122         int ret;
1123         int err;
1124         int virt_wqs = 0;
1125         int sq_size;
1126         int rq_size;
1127         u8 sq_encoded_size;
1128         u8 rq_encoded_size;
1129         /* int counter; */
1130
1131         if (init_attr->create_flags)
1132                 return ERR_PTR(-EINVAL);
1133
1134         atomic_inc(&qps_created);
1135         switch (init_attr->qp_type) {
1136                 case IB_QPT_RC:
1137                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1138                                 init_attr->cap.max_inline_data = 0;
1139                         } else {
1140                                 init_attr->cap.max_inline_data = 64;
1141                         }
1142                         sq_size = init_attr->cap.max_send_wr;
1143                         rq_size = init_attr->cap.max_recv_wr;
1144
1145                         /* check if the encoded sizes are OK or not... */
1146                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1147                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1148
1149                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1150                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1151                                                 rq_size, sq_size);
1152                                 return ERR_PTR(-EINVAL);
1153                         }
1154
1155                         init_attr->cap.max_send_wr = sq_size -2;
1156                         init_attr->cap.max_recv_wr = rq_size -1;
1157                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1158
1159                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1160                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp);
1161                         if (ret) {
1162                                 return ERR_PTR(ret);
1163                         }
1164
1165                         /* Need 512 (actually now 1024) byte alignment on this structure */
1166                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1167                         if (!mem) {
1168                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1169                                 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1170                                 return ERR_PTR(-ENOMEM);
1171                         }
1172                         u64nesqp = (unsigned long)mem;
1173                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1174                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1175                         u64nesqp &= ~u64temp;
1176                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1177                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1178                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1179                         nesqp->allocated_buffer = mem;
1180
1181                         if (udata) {
1182                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1183                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1184                                         kfree(nesqp->allocated_buffer);
1185                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1186                                         return NULL;
1187                                 }
1188                                 if (req.user_wqe_buffers) {
1189                                         virt_wqs = 1;
1190                                 }
1191                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1192                                         nesqp->user_mode = 1;
1193                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1194                                         if (virt_wqs) {
1195                                                 err = 1;
1196                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1197                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1198                                                                 list_del(&nespbl->list);
1199                                                                 err = 0;
1200                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1201                                                                           nespbl, nespbl->user_base);
1202                                                                 break;
1203                                                         }
1204                                                 }
1205                                                 if (err) {
1206                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1207                                                                   (long long unsigned int)req.user_wqe_buffers);
1208                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1209                                                         kfree(nesqp->allocated_buffer);
1210                                                         return ERR_PTR(-EFAULT);
1211                                                 }
1212                                         }
1213
1214                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1215                                         nesqp->mmap_sq_db_index =
1216                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1217                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1218                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1219                                                         nespd->mmap_db_index); */
1220                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1221                                                 nes_debug(NES_DBG_QP,
1222                                                           "db index > max user regions, failing create QP\n");
1223                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1224                                                 if (virt_wqs) {
1225                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1226                                                                             nespbl->pbl_pbase);
1227                                                         kfree(nespbl);
1228                                                 }
1229                                                 kfree(nesqp->allocated_buffer);
1230                                                 return ERR_PTR(-ENOMEM);
1231                                         }
1232                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1233                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1234                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1235                                 } else {
1236                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1237                                         kfree(nesqp->allocated_buffer);
1238                                         return ERR_PTR(-EFAULT);
1239                                 }
1240                         }
1241                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1242                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1243                         if (err) {
1244                                 nes_debug(NES_DBG_QP,
1245                                           "error geting qp mem code = %d\n", err);
1246                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1247                                 kfree(nesqp->allocated_buffer);
1248                                 return ERR_PTR(-ENOMEM);
1249                         }
1250
1251                         nesqp->hwqp.sq_size = sq_size;
1252                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1253                         nesqp->hwqp.sq_head = 1;
1254                         nesqp->hwqp.rq_size = rq_size;
1255                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1256                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1257                                         (void *)nesqp->nesqp_context_pbase);
1258                         */
1259                         nesqp->hwqp.qp_id = qp_num;
1260                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1261                         nesqp->nespd = nespd;
1262
1263                         nescq = to_nescq(init_attr->send_cq);
1264                         nesqp->nesscq = nescq;
1265                         nescq = to_nescq(init_attr->recv_cq);
1266                         nesqp->nesrcq = nescq;
1267
1268                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1269                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1270                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1271                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1272                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1273                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1274                         if (!udata) {
1275                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1276                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1277                         }
1278                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1279                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1280                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1281                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1282                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1283
1284
1285                         if (!virt_wqs) {
1286                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1287                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1288                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1289                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1290                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1291                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1292                         } else {
1293                                 u64temp = (u64)nesqp->pbl_pbase;
1294                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1295                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1296                         }
1297
1298                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1299                                         nesvnic->next_qp_nic_index,
1300                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1301                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1302                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1303                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1304                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1305                         nesvnic->next_qp_nic_index++;
1306                         if ((nesvnic->next_qp_nic_index > 3) ||
1307                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1308                                 nesvnic->next_qp_nic_index = 0;
1309                         }
1310                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1311
1312                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1313                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1314                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1315                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1316                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1317                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1318                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1319                                         NES_QPCONTEXT_ORDIRD_AAH |
1320                                         ((((u32)nesadapter->max_irrq_wr) <<
1321                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1322                         if (disable_mpa_crc) {
1323                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1324                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1325                         }
1326
1327
1328                         /* Create the QP */
1329                         cqp_request = nes_get_cqp_request(nesdev);
1330                         if (cqp_request == NULL) {
1331                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1332                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1333                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1334                                 kfree(nesqp->allocated_buffer);
1335                                 return ERR_PTR(-ENOMEM);
1336                         }
1337                         cqp_request->waiting = 1;
1338                         cqp_wqe = &cqp_request->cqp_wqe;
1339
1340                         if (!virt_wqs) {
1341                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1342                                         NES_CQP_QP_IWARP_STATE_IDLE;
1343                         } else {
1344                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1345                                         NES_CQP_QP_IWARP_STATE_IDLE;
1346                         }
1347                         opcode |= NES_CQP_QP_CQS_VALID;
1348                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1349                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1350                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1351
1352                         u64temp = (u64)nesqp->nesqp_context_pbase;
1353                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1354
1355                         atomic_set(&cqp_request->refcount, 2);
1356                         nes_post_cqp_request(nesdev, cqp_request);
1357
1358                         /* Wait for CQP */
1359                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1360                                         nesqp->hwqp.qp_id);
1361                         ret = wait_event_timeout(cqp_request->waitq,
1362                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1363                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1364                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1365                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1366                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1367                                         cqp_request->major_code, cqp_request->minor_code);
1368                         if ((!ret) || (cqp_request->major_code)) {
1369                                 nes_put_cqp_request(nesdev, cqp_request);
1370                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1371                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1372                                 kfree(nesqp->allocated_buffer);
1373                                 if (!ret) {
1374                                         return ERR_PTR(-ETIME);
1375                                 } else {
1376                                         return ERR_PTR(-EIO);
1377                                 }
1378                         }
1379
1380                         nes_put_cqp_request(nesdev, cqp_request);
1381
1382                         if (ibpd->uobject) {
1383                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1384                                 uresp.actual_sq_size = sq_size;
1385                                 uresp.actual_rq_size = rq_size;
1386                                 uresp.qp_id = nesqp->hwqp.qp_id;
1387                                 uresp.nes_drv_opt = nes_drv_opt;
1388                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1389                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1390                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1391                                         kfree(nesqp->allocated_buffer);
1392                                         return ERR_PTR(-EFAULT);
1393                                 }
1394                         }
1395
1396                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1397                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1398                         spin_lock_init(&nesqp->lock);
1399                         nes_add_ref(&nesqp->ibqp);
1400                         break;
1401                 default:
1402                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1403                         return ERR_PTR(-EINVAL);
1404         }
1405
1406         nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1407
1408         /* update the QP table */
1409         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1410         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1411                         netdev_refcnt_read(nesvnic->netdev));
1412
1413         return &nesqp->ibqp;
1414 }
1415
1416
1417 /**
1418  * nes_clean_cq
1419  */
1420 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1421 {
1422         u32 cq_head;
1423         u32 lo;
1424         u32 hi;
1425         u64 u64temp;
1426         unsigned long flags = 0;
1427
1428         spin_lock_irqsave(&nescq->lock, flags);
1429
1430         cq_head = nescq->hw_cq.cq_head;
1431         while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1432                 rmb();
1433                 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1434                 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1435                 u64temp = (((u64)hi) << 32) | ((u64)lo);
1436                 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1437                 if (u64temp == (u64)(unsigned long)nesqp) {
1438                         /* Zero the context value so cqe will be ignored */
1439                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1440                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1441                 }
1442
1443                 if (++cq_head >= nescq->hw_cq.cq_size)
1444                         cq_head = 0;
1445         }
1446
1447         spin_unlock_irqrestore(&nescq->lock, flags);
1448 }
1449
1450
1451 /**
1452  * nes_destroy_qp
1453  */
1454 static int nes_destroy_qp(struct ib_qp *ibqp)
1455 {
1456         struct nes_qp *nesqp = to_nesqp(ibqp);
1457         struct nes_ucontext *nes_ucontext;
1458         struct ib_qp_attr attr;
1459         struct iw_cm_id *cm_id;
1460         struct iw_cm_event cm_event;
1461         int ret;
1462
1463         atomic_inc(&sw_qps_destroyed);
1464         nesqp->destroyed = 1;
1465
1466         /* Blow away the connection if it exists. */
1467         if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1468                 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1469                 attr.qp_state = IB_QPS_ERR;
1470                 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1471         }
1472
1473         if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1474                         (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1475                 cm_id = nesqp->cm_id;
1476                 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1477                 cm_event.status = -ETIMEDOUT;
1478                 cm_event.local_addr = cm_id->local_addr;
1479                 cm_event.remote_addr = cm_id->remote_addr;
1480                 cm_event.private_data = NULL;
1481                 cm_event.private_data_len = 0;
1482
1483                 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1484                                 "QP%u. cm_id = %p, refcount = %u. \n",
1485                                 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1486
1487                 cm_id->rem_ref(cm_id);
1488                 ret = cm_id->event_handler(cm_id, &cm_event);
1489                 if (ret)
1490                         nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1491         }
1492
1493         if (nesqp->user_mode) {
1494                 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1495                         nes_ucontext = to_nesucontext(ibqp->uobject->context);
1496                         clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1497                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1498                         if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1499                                 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1500                         }
1501                 }
1502                 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1503                         nesqp->sq_kmapped = 0;
1504                         kunmap(nesqp->page);
1505                 }
1506         } else {
1507                 /* Clean any pending completions from the cq(s) */
1508                 if (nesqp->nesscq)
1509                         nes_clean_cq(nesqp, nesqp->nesscq);
1510
1511                 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1512                         nes_clean_cq(nesqp, nesqp->nesrcq);
1513         }
1514
1515         nes_rem_ref(&nesqp->ibqp);
1516         return 0;
1517 }
1518
1519
1520 /**
1521  * nes_create_cq
1522  */
1523 static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
1524                 int comp_vector,
1525                 struct ib_ucontext *context, struct ib_udata *udata)
1526 {
1527         u64 u64temp;
1528         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1529         struct nes_device *nesdev = nesvnic->nesdev;
1530         struct nes_adapter *nesadapter = nesdev->nesadapter;
1531         struct nes_cq *nescq;
1532         struct nes_ucontext *nes_ucontext = NULL;
1533         struct nes_cqp_request *cqp_request;
1534         void *mem = NULL;
1535         struct nes_hw_cqp_wqe *cqp_wqe;
1536         struct nes_pbl *nespbl = NULL;
1537         struct nes_create_cq_req req;
1538         struct nes_create_cq_resp resp;
1539         u32 cq_num = 0;
1540         u32 opcode = 0;
1541         u32 pbl_entries = 1;
1542         int err;
1543         unsigned long flags;
1544         int ret;
1545
1546         if (entries > nesadapter->max_cqe)
1547                 return ERR_PTR(-EINVAL);
1548
1549         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1550                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq);
1551         if (err) {
1552                 return ERR_PTR(err);
1553         }
1554
1555         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1556         if (!nescq) {
1557                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1558                 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1559                 return ERR_PTR(-ENOMEM);
1560         }
1561
1562         nescq->hw_cq.cq_size = max(entries + 1, 5);
1563         nescq->hw_cq.cq_number = cq_num;
1564         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1565
1566
1567         if (context) {
1568                 nes_ucontext = to_nesucontext(context);
1569                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1570                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1571                         kfree(nescq);
1572                         return ERR_PTR(-EFAULT);
1573                 }
1574                 nesvnic->mcrq_ucontext = nes_ucontext;
1575                 nes_ucontext->mcrqf = req.mcrqf;
1576                 if (nes_ucontext->mcrqf) {
1577                         if (nes_ucontext->mcrqf & 0x80000000)
1578                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1579                         else if (nes_ucontext->mcrqf & 0x40000000)
1580                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1581                         else
1582                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1583                         nescq->mcrqf = nes_ucontext->mcrqf;
1584                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1585                 }
1586                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1587                                 (unsigned long)req.user_cq_buffer, entries);
1588                 err = 1;
1589                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1590                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1591                                 list_del(&nespbl->list);
1592                                 err = 0;
1593                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1594                                                 nespbl);
1595                                 break;
1596                         }
1597                 }
1598                 if (err) {
1599                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1600                         kfree(nescq);
1601                         return ERR_PTR(-EFAULT);
1602                 }
1603
1604                 pbl_entries = nespbl->pbl_size >> 3;
1605                 nescq->cq_mem_size = 0;
1606         } else {
1607                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1608                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1609                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1610
1611                 /* allocate the physical buffer space */
1612                 mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1613                                 &nescq->hw_cq.cq_pbase);
1614                 if (!mem) {
1615                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1616                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1617                         kfree(nescq);
1618                         return ERR_PTR(-ENOMEM);
1619                 }
1620
1621                 memset(mem, 0, nescq->cq_mem_size);
1622                 nescq->hw_cq.cq_vbase = mem;
1623                 nescq->hw_cq.cq_head = 0;
1624                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1625                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1626                                 (u32)nescq->hw_cq.cq_pbase);
1627         }
1628
1629         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1630         spin_lock_init(&nescq->lock);
1631
1632         /* send CreateCQ request to CQP */
1633         cqp_request = nes_get_cqp_request(nesdev);
1634         if (cqp_request == NULL) {
1635                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1636                 if (!context)
1637                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1638                                         nescq->hw_cq.cq_pbase);
1639                 else {
1640                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1641                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1642                         kfree(nespbl);
1643                 }
1644
1645                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1646                 kfree(nescq);
1647                 return ERR_PTR(-ENOMEM);
1648         }
1649         cqp_request->waiting = 1;
1650         cqp_wqe = &cqp_request->cqp_wqe;
1651
1652         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1653                         NES_CQP_CQ_CHK_OVERFLOW |
1654                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1655
1656         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1657
1658         if (pbl_entries != 1) {
1659                 if (pbl_entries > 32) {
1660                         /* use 4k pbl */
1661                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1662                         if (nesadapter->free_4kpbl == 0) {
1663                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1664                                 nes_free_cqp_request(nesdev, cqp_request);
1665                                 if (!context)
1666                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1667                                                         nescq->hw_cq.cq_pbase);
1668                                 else {
1669                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1670                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1671                                         kfree(nespbl);
1672                                 }
1673                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1674                                 kfree(nescq);
1675                                 return ERR_PTR(-ENOMEM);
1676                         } else {
1677                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1678                                 nescq->virtual_cq = 2;
1679                                 nesadapter->free_4kpbl--;
1680                         }
1681                 } else {
1682                         /* use 256 byte pbl */
1683                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1684                         if (nesadapter->free_256pbl == 0) {
1685                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1686                                 nes_free_cqp_request(nesdev, cqp_request);
1687                                 if (!context)
1688                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1689                                                         nescq->hw_cq.cq_pbase);
1690                                 else {
1691                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1692                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1693                                         kfree(nespbl);
1694                                 }
1695                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1696                                 kfree(nescq);
1697                                 return ERR_PTR(-ENOMEM);
1698                         } else {
1699                                 opcode |= NES_CQP_CQ_VIRT;
1700                                 nescq->virtual_cq = 1;
1701                                 nesadapter->free_256pbl--;
1702                         }
1703                 }
1704         }
1705
1706         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1707
1708         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1709         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1710         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1711                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1712
1713         if (context) {
1714                 if (pbl_entries != 1)
1715                         u64temp = (u64)nespbl->pbl_pbase;
1716                 else
1717                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1718                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1719                                 nes_ucontext->mmap_db_index[0]);
1720         } else {
1721                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1722                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1723         }
1724         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1725         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1726         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1727         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1728                         cpu_to_le32((u32)(u64temp >> 1));
1729         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1730                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1731
1732         atomic_set(&cqp_request->refcount, 2);
1733         nes_post_cqp_request(nesdev, cqp_request);
1734
1735         /* Wait for CQP */
1736         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1737                         nescq->hw_cq.cq_number);
1738         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1739                         NES_EVENT_TIMEOUT * 2);
1740         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1741                         nescq->hw_cq.cq_number, ret);
1742         if ((!ret) || (cqp_request->major_code)) {
1743                 nes_put_cqp_request(nesdev, cqp_request);
1744                 if (!context)
1745                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1746                                         nescq->hw_cq.cq_pbase);
1747                 else {
1748                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1749                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1750                         kfree(nespbl);
1751                 }
1752                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1753                 kfree(nescq);
1754                 return ERR_PTR(-EIO);
1755         }
1756         nes_put_cqp_request(nesdev, cqp_request);
1757
1758         if (context) {
1759                 /* free the nespbl */
1760                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1761                                 nespbl->pbl_pbase);
1762                 kfree(nespbl);
1763                 resp.cq_id = nescq->hw_cq.cq_number;
1764                 resp.cq_size = nescq->hw_cq.cq_size;
1765                 resp.mmap_db_index = 0;
1766                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
1767                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1768                         kfree(nescq);
1769                         return ERR_PTR(-EFAULT);
1770                 }
1771         }
1772
1773         return &nescq->ibcq;
1774 }
1775
1776
1777 /**
1778  * nes_destroy_cq
1779  */
1780 static int nes_destroy_cq(struct ib_cq *ib_cq)
1781 {
1782         struct nes_cq *nescq;
1783         struct nes_device *nesdev;
1784         struct nes_vnic *nesvnic;
1785         struct nes_adapter *nesadapter;
1786         struct nes_hw_cqp_wqe *cqp_wqe;
1787         struct nes_cqp_request *cqp_request;
1788         unsigned long flags;
1789         u32 opcode = 0;
1790         int ret;
1791
1792         if (ib_cq == NULL)
1793                 return 0;
1794
1795         nescq = to_nescq(ib_cq);
1796         nesvnic = to_nesvnic(ib_cq->device);
1797         nesdev = nesvnic->nesdev;
1798         nesadapter = nesdev->nesadapter;
1799
1800         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1801
1802         /* Send DestroyCQ request to CQP */
1803         cqp_request = nes_get_cqp_request(nesdev);
1804         if (cqp_request == NULL) {
1805                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1806                 return -ENOMEM;
1807         }
1808         cqp_request->waiting = 1;
1809         cqp_wqe = &cqp_request->cqp_wqe;
1810         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1811         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1812         if (nescq->virtual_cq == 1) {
1813                 nesadapter->free_256pbl++;
1814                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1815                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1816                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1817                 }
1818         } else if (nescq->virtual_cq == 2) {
1819                 nesadapter->free_4kpbl++;
1820                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1821                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1822                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1823                 }
1824                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1825         }
1826
1827         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1828
1829         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1830         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1831         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1832                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1833         if (!nescq->mcrqf)
1834                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1835
1836         atomic_set(&cqp_request->refcount, 2);
1837         nes_post_cqp_request(nesdev, cqp_request);
1838
1839         /* Wait for CQP */
1840         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1841                         nescq->hw_cq.cq_number);
1842         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1843                         NES_EVENT_TIMEOUT);
1844         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1845                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1846                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1847                         cqp_request->minor_code);
1848         if (!ret) {
1849                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1850                                         nescq->hw_cq.cq_number);
1851                 ret = -ETIME;
1852         } else if (cqp_request->major_code) {
1853                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1854                                         nescq->hw_cq.cq_number);
1855                 ret = -EIO;
1856         } else {
1857                 ret = 0;
1858         }
1859         nes_put_cqp_request(nesdev, cqp_request);
1860
1861         if (nescq->cq_mem_size)
1862                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1863                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1864         kfree(nescq);
1865
1866         return ret;
1867 }
1868
1869 /**
1870  * root_256
1871  */
1872 static u32 root_256(struct nes_device *nesdev,
1873                     struct nes_root_vpbl *root_vpbl,
1874                     struct nes_root_vpbl *new_root,
1875                     u16 pbl_count_4k)
1876 {
1877         u64 leaf_pbl;
1878         int i, j, k;
1879
1880         if (pbl_count_4k == 1) {
1881                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1882                                                 512, &new_root->pbl_pbase);
1883
1884                 if (new_root->pbl_vbase == NULL)
1885                         return 0;
1886
1887                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1888                 for (i = 0; i < 16; i++) {
1889                         new_root->pbl_vbase[i].pa_low =
1890                                 cpu_to_le32((u32)leaf_pbl);
1891                         new_root->pbl_vbase[i].pa_high =
1892                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1893                         leaf_pbl += 256;
1894                 }
1895         } else {
1896                 for (i = 3; i >= 0; i--) {
1897                         j = i * 16;
1898                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1899                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1900                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1901                                 << 32);
1902                         for (k = 1; k < 16; k++) {
1903                                 leaf_pbl += 256;
1904                                 root_vpbl->pbl_vbase[j + k].pa_low =
1905                                                 cpu_to_le32((u32)leaf_pbl);
1906                                 root_vpbl->pbl_vbase[j + k].pa_high =
1907                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1908                         }
1909                 }
1910         }
1911
1912         return 1;
1913 }
1914
1915
1916 /**
1917  * nes_reg_mr
1918  */
1919 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1920                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1921                 dma_addr_t single_buffer, u16 pbl_count_4k,
1922                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1923                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1924 {
1925         struct nes_hw_cqp_wqe *cqp_wqe;
1926         struct nes_cqp_request *cqp_request;
1927         unsigned long flags;
1928         int ret;
1929         struct nes_adapter *nesadapter = nesdev->nesadapter;
1930         uint pg_cnt = 0;
1931         u16 pbl_count_256 = 0;
1932         u16 pbl_count = 0;
1933         u8  use_256_pbls = 0;
1934         u8  use_4k_pbls = 0;
1935         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1936         struct nes_root_vpbl new_root = { 0, NULL, NULL };
1937         u32 opcode = 0;
1938         u16 major_code;
1939
1940         /* Register the region with the adapter */
1941         cqp_request = nes_get_cqp_request(nesdev);
1942         if (cqp_request == NULL) {
1943                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1944                 return -ENOMEM;
1945         }
1946         cqp_request->waiting = 1;
1947         cqp_wqe = &cqp_request->cqp_wqe;
1948
1949         if (pbl_count_4k) {
1950                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1951
1952                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1953                 pbl_count_256 = (pg_cnt + 31) / 32;
1954                 if (pg_cnt <= 32) {
1955                         if (pbl_count_256 <= nesadapter->free_256pbl)
1956                                 use_256_pbls = 1;
1957                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1958                                 use_4k_pbls = 1;
1959                 } else if (pg_cnt <= 2048) {
1960                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1961                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1962                                 use_4k_pbls = 1;
1963                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1964                                 use_256_pbls = 1;
1965                                 use_two_level = 1;
1966                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1967                                 use_4k_pbls = 1;
1968                         }
1969                 } else {
1970                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1971                                 use_4k_pbls = 1;
1972                 }
1973
1974                 if (use_256_pbls) {
1975                         pbl_count = pbl_count_256;
1976                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1977                 } else if (use_4k_pbls) {
1978                         pbl_count =  pbl_count_4k;
1979                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1980                 } else {
1981                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1982                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1983                         nes_free_cqp_request(nesdev, cqp_request);
1984                         return -ENOMEM;
1985                 }
1986
1987                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1988         }
1989
1990         if (use_256_pbls && use_two_level) {
1991                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1992                         if (new_root.pbl_pbase != 0)
1993                                 root_vpbl = &new_root;
1994                 } else {
1995                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1996                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1997                         use_256_pbls = 0;
1998
1999                         if (pbl_count_4k == 1)
2000                                 use_two_level = 0;
2001                         pbl_count = pbl_count_4k;
2002
2003                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
2004                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
2005                                 use_4k_pbls = 1;
2006                         }
2007                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2008
2009                         if (use_4k_pbls == 0)
2010                                 return -ENOMEM;
2011                 }
2012         }
2013
2014         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
2015                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
2016         if (acc & IB_ACCESS_LOCAL_WRITE)
2017                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
2018         if (acc & IB_ACCESS_REMOTE_WRITE)
2019                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
2020         if (acc & IB_ACCESS_REMOTE_READ)
2021                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
2022         if (acc & IB_ACCESS_MW_BIND)
2023                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
2024
2025         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2026         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
2027         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
2028         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
2029
2030         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
2031                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
2032         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
2033                         cpu_to_le32(nespd->pd_id & 0x00007fff);
2034         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
2035
2036         if (pbl_count == 0) {
2037                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
2038         } else {
2039                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
2040                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
2041                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
2042
2043                 if (use_4k_pbls)
2044                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
2045         }
2046         barrier();
2047
2048         atomic_set(&cqp_request->refcount, 2);
2049         nes_post_cqp_request(nesdev, cqp_request);
2050
2051         /* Wait for CQP */
2052         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
2053                         NES_EVENT_TIMEOUT);
2054         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
2055                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2056                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
2057         major_code = cqp_request->major_code;
2058         nes_put_cqp_request(nesdev, cqp_request);
2059
2060         if ((!ret || major_code) && pbl_count != 0) {
2061                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2062                 if (use_256_pbls)
2063                         nesadapter->free_256pbl += pbl_count + use_two_level;
2064                 else if (use_4k_pbls)
2065                         nesadapter->free_4kpbl += pbl_count + use_two_level;
2066                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2067         }
2068         if (new_root.pbl_pbase)
2069                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
2070                                     new_root.pbl_pbase);
2071
2072         if (!ret)
2073                 return -ETIME;
2074         else if (major_code)
2075                 return -EIO;
2076
2077         *actual_pbl_cnt = pbl_count + use_two_level;
2078         *used_4k_pbls = use_4k_pbls;
2079         return 0;
2080 }
2081
2082
2083 /**
2084  * nes_reg_phys_mr
2085  */
2086 static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
2087                 struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
2088                 u64 * iova_start)
2089 {
2090         u64 region_length;
2091         struct nes_pd *nespd = to_nespd(ib_pd);
2092         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2093         struct nes_device *nesdev = nesvnic->nesdev;
2094         struct nes_adapter *nesadapter = nesdev->nesadapter;
2095         struct nes_mr *nesmr;
2096         struct ib_mr *ibmr;
2097         struct nes_vpbl vpbl;
2098         struct nes_root_vpbl root_vpbl;
2099         u32 stag;
2100         u32 i;
2101         unsigned long mask;
2102         u32 stag_index = 0;
2103         u32 next_stag_index = 0;
2104         u32 driver_key = 0;
2105         u32 root_pbl_index = 0;
2106         u32 cur_pbl_index = 0;
2107         int err = 0;
2108         int ret = 0;
2109         u16 pbl_count = 0;
2110         u8 single_page = 1;
2111         u8 stag_key = 0;
2112
2113         region_length = 0;
2114         vpbl.pbl_vbase = NULL;
2115         root_vpbl.pbl_vbase = NULL;
2116         root_vpbl.pbl_pbase = 0;
2117
2118         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2119         stag_key = (u8)next_stag_index;
2120
2121         driver_key = 0;
2122
2123         next_stag_index >>= 8;
2124         next_stag_index %= nesadapter->max_mr;
2125         if (num_phys_buf > (1024*512)) {
2126                 return ERR_PTR(-E2BIG);
2127         }
2128
2129         if ((buffer_list[0].addr ^ *iova_start) & ~PAGE_MASK)
2130                 return ERR_PTR(-EINVAL);
2131
2132         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2133                         &stag_index, &next_stag_index);
2134         if (err) {
2135                 return ERR_PTR(err);
2136         }
2137
2138         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2139         if (!nesmr) {
2140                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2141                 return ERR_PTR(-ENOMEM);
2142         }
2143
2144         for (i = 0; i < num_phys_buf; i++) {
2145
2146                 if ((i & 0x01FF) == 0) {
2147                         if (root_pbl_index == 1) {
2148                                 /* Allocate the root PBL */
2149                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
2150                                                 &root_vpbl.pbl_pbase);
2151                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2152                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2153                                 if (!root_vpbl.pbl_vbase) {
2154                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2155                                                         vpbl.pbl_pbase);
2156                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2157                                         kfree(nesmr);
2158                                         return ERR_PTR(-ENOMEM);
2159                                 }
2160                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
2161                                 if (!root_vpbl.leaf_vpbl) {
2162                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2163                                                         root_vpbl.pbl_pbase);
2164                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2165                                                         vpbl.pbl_pbase);
2166                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2167                                         kfree(nesmr);
2168                                         return ERR_PTR(-ENOMEM);
2169                                 }
2170                                 root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
2171                                 root_vpbl.pbl_vbase[0].pa_high =
2172                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2173                                 root_vpbl.leaf_vpbl[0] = vpbl;
2174                         }
2175                         /* Allocate a 4K buffer for the PBL */
2176                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2177                                         &vpbl.pbl_pbase);
2178                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2179                                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2180                         if (!vpbl.pbl_vbase) {
2181                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2182                                 ibmr = ERR_PTR(-ENOMEM);
2183                                 kfree(nesmr);
2184                                 goto reg_phys_err;
2185                         }
2186                         /* Fill in the root table */
2187                         if (1 <= root_pbl_index) {
2188                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2189                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2190                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2191                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2192                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2193                         }
2194                         root_pbl_index++;
2195                         cur_pbl_index = 0;
2196                 }
2197
2198                 mask = !buffer_list[i].size;
2199                 if (i != 0)
2200                         mask |= buffer_list[i].addr;
2201                 if (i != num_phys_buf - 1)
2202                         mask |= buffer_list[i].addr + buffer_list[i].size;
2203
2204                 if (mask & ~PAGE_MASK) {
2205                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2206                         nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2207                         ibmr = ERR_PTR(-EINVAL);
2208                         kfree(nesmr);
2209                         goto reg_phys_err;
2210                 }
2211
2212                 region_length += buffer_list[i].size;
2213                 if ((i != 0) && (single_page)) {
2214                         if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
2215                                 single_page = 0;
2216                 }
2217                 vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr & PAGE_MASK);
2218                 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
2219                                 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
2220         }
2221
2222         stag = stag_index << 8;
2223         stag |= driver_key;
2224         stag += (u32)stag_key;
2225
2226         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2227                         " length = 0x%016lX, index = 0x%08X\n",
2228                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2229
2230         /* Make the leaf PBL the root if only one PBL */
2231         if (root_pbl_index == 1) {
2232                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2233         }
2234
2235         if (single_page) {
2236                 pbl_count = 0;
2237         } else {
2238                 pbl_count = root_pbl_index;
2239         }
2240         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2241                         buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start,
2242                         &nesmr->pbls_used, &nesmr->pbl_4k);
2243
2244         if (ret == 0) {
2245                 nesmr->ibmr.rkey = stag;
2246                 nesmr->ibmr.lkey = stag;
2247                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2248                 ibmr = &nesmr->ibmr;
2249         } else {
2250                 kfree(nesmr);
2251                 ibmr = ERR_PTR(-ENOMEM);
2252         }
2253
2254         reg_phys_err:
2255         /* free the resources */
2256         if (root_pbl_index == 1) {
2257                 /* single PBL case */
2258                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2259         } else {
2260                 for (i=0; i<root_pbl_index; i++) {
2261                         pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
2262                                         root_vpbl.leaf_vpbl[i].pbl_pbase);
2263                 }
2264                 kfree(root_vpbl.leaf_vpbl);
2265                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2266                                 root_vpbl.pbl_pbase);
2267         }
2268
2269         return ibmr;
2270 }
2271
2272
2273 /**
2274  * nes_get_dma_mr
2275  */
2276 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2277 {
2278         struct ib_phys_buf bl;
2279         u64 kva = 0;
2280
2281         nes_debug(NES_DBG_MR, "\n");
2282
2283         bl.size = (u64)0xffffffffffULL;
2284         bl.addr = 0;
2285         return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
2286 }
2287
2288
2289 /**
2290  * nes_reg_user_mr
2291  */
2292 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2293                 u64 virt, int acc, struct ib_udata *udata)
2294 {
2295         u64 iova_start;
2296         __le64 *pbl;
2297         u64 region_length;
2298         dma_addr_t last_dma_addr = 0;
2299         dma_addr_t first_dma_addr = 0;
2300         struct nes_pd *nespd = to_nespd(pd);
2301         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2302         struct nes_device *nesdev = nesvnic->nesdev;
2303         struct nes_adapter *nesadapter = nesdev->nesadapter;
2304         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2305         struct ib_umem_chunk *chunk;
2306         struct nes_ucontext *nes_ucontext;
2307         struct nes_pbl *nespbl;
2308         struct nes_mr *nesmr;
2309         struct ib_umem *region;
2310         struct nes_mem_reg_req req;
2311         struct nes_vpbl vpbl;
2312         struct nes_root_vpbl root_vpbl;
2313         int nmap_index, page_index;
2314         int page_count = 0;
2315         int err, pbl_depth = 0;
2316         int chunk_pages;
2317         int ret;
2318         u32 stag;
2319         u32 stag_index = 0;
2320         u32 next_stag_index;
2321         u32 driver_key;
2322         u32 root_pbl_index = 0;
2323         u32 cur_pbl_index = 0;
2324         u32 skip_pages;
2325         u16 pbl_count;
2326         u8 single_page = 1;
2327         u8 stag_key;
2328
2329         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2330         if (IS_ERR(region)) {
2331                 return (struct ib_mr *)region;
2332         }
2333
2334         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2335                         " offset = %u, page size = %u.\n",
2336                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2337                         region->offset, region->page_size);
2338
2339         skip_pages = ((u32)region->offset) >> 12;
2340
2341         if (ib_copy_from_udata(&req, udata, sizeof(req)))
2342                 return ERR_PTR(-EFAULT);
2343         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2344
2345         switch (req.reg_type) {
2346                 case IWNES_MEMREG_TYPE_MEM:
2347                         pbl_depth = 0;
2348                         region_length = 0;
2349                         vpbl.pbl_vbase = NULL;
2350                         root_vpbl.pbl_vbase = NULL;
2351                         root_vpbl.pbl_pbase = 0;
2352
2353                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2354                         stag_key = (u8)next_stag_index;
2355
2356                         driver_key = next_stag_index & 0x70000000;
2357
2358                         next_stag_index >>= 8;
2359                         next_stag_index %= nesadapter->max_mr;
2360
2361                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2362                                         nesadapter->max_mr, &stag_index, &next_stag_index);
2363                         if (err) {
2364                                 ib_umem_release(region);
2365                                 return ERR_PTR(err);
2366                         }
2367
2368                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2369                         if (!nesmr) {
2370                                 ib_umem_release(region);
2371                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2372                                 return ERR_PTR(-ENOMEM);
2373                         }
2374                         nesmr->region = region;
2375
2376                         list_for_each_entry(chunk, &region->chunk_list, list) {
2377                                 nes_debug(NES_DBG_MR, "Chunk: nents = %u, nmap = %u .\n",
2378                                                 chunk->nents, chunk->nmap);
2379                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2380                                         if (sg_dma_address(&chunk->page_list[nmap_index]) & ~PAGE_MASK) {
2381                                                 ib_umem_release(region);
2382                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2383                                                 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2384                                                                 (unsigned int) sg_dma_address(&chunk->page_list[nmap_index]));
2385                                                 ibmr = ERR_PTR(-EINVAL);
2386                                                 kfree(nesmr);
2387                                                 goto reg_user_mr_err;
2388                                         }
2389
2390                                         if (!sg_dma_len(&chunk->page_list[nmap_index])) {
2391                                                 ib_umem_release(region);
2392                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2393                                                                 stag_index);
2394                                                 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2395                                                 ibmr = ERR_PTR(-EINVAL);
2396                                                 kfree(nesmr);
2397                                                 goto reg_user_mr_err;
2398                                         }
2399
2400                                         region_length += sg_dma_len(&chunk->page_list[nmap_index]);
2401                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2402                                         region_length -= skip_pages << 12;
2403                                         for (page_index=skip_pages; page_index < chunk_pages; page_index++) {
2404                                                 skip_pages = 0;
2405                                                 if ((page_count!=0)&&(page_count<<12)-(region->offset&(4096-1))>=region->length)
2406                                                         goto enough_pages;
2407                                                 if ((page_count&0x01FF) == 0) {
2408                                                         if (page_count >= 1024 * 512) {
2409                                                                 ib_umem_release(region);
2410                                                                 nes_free_resource(nesadapter,
2411                                                                                 nesadapter->allocated_mrs, stag_index);
2412                                                                 kfree(nesmr);
2413                                                                 ibmr = ERR_PTR(-E2BIG);
2414                                                                 goto reg_user_mr_err;
2415                                                         }
2416                                                         if (root_pbl_index == 1) {
2417                                                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2418                                                                                 8192, &root_vpbl.pbl_pbase);
2419                                                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2420                                                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2421                                                                 if (!root_vpbl.pbl_vbase) {
2422                                                                         ib_umem_release(region);
2423                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2424                                                                                         vpbl.pbl_pbase);
2425                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2426                                                                                         stag_index);
2427                                                                         kfree(nesmr);
2428                                                                         ibmr = ERR_PTR(-ENOMEM);
2429                                                                         goto reg_user_mr_err;
2430                                                                 }
2431                                                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2432                                                                                 GFP_KERNEL);
2433                                                                 if (!root_vpbl.leaf_vpbl) {
2434                                                                         ib_umem_release(region);
2435                                                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2436                                                                                         root_vpbl.pbl_pbase);
2437                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2438                                                                                         vpbl.pbl_pbase);
2439                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2440                                                                                         stag_index);
2441                                                                         kfree(nesmr);
2442                                                                         ibmr = ERR_PTR(-ENOMEM);
2443                                                                         goto reg_user_mr_err;
2444                                                                 }
2445                                                                 root_vpbl.pbl_vbase[0].pa_low =
2446                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2447                                                                 root_vpbl.pbl_vbase[0].pa_high =
2448                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2449                                                                 root_vpbl.leaf_vpbl[0] = vpbl;
2450                                                         }
2451                                                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2452                                                                         &vpbl.pbl_pbase);
2453                                                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2454                                                                         vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2455                                                         if (!vpbl.pbl_vbase) {
2456                                                                 ib_umem_release(region);
2457                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2458                                                                 ibmr = ERR_PTR(-ENOMEM);
2459                                                                 kfree(nesmr);
2460                                                                 goto reg_user_mr_err;
2461                                                         }
2462                                                         if (1 <= root_pbl_index) {
2463                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2464                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2465                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2466                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2467                                                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2468                                                         }
2469                                                         root_pbl_index++;
2470                                                         cur_pbl_index = 0;
2471                                                 }
2472                                                 if (single_page) {
2473                                                         if (page_count != 0) {
2474                                                                 if ((last_dma_addr+4096) !=
2475                                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2476                                                                                 (page_index*4096)))
2477                                                                         single_page = 0;
2478                                                                 last_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2479                                                                                 (page_index*4096);
2480                                                         } else {
2481                                                                 first_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2482                                                                                 (page_index*4096);
2483                                                                 last_dma_addr = first_dma_addr;
2484                                                         }
2485                                                 }
2486
2487                                                 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2488                                                                 cpu_to_le32((u32)(sg_dma_address(&chunk->page_list[nmap_index])+
2489                                                                 (page_index*4096)));
2490                                                 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2491                                                                 cpu_to_le32((u32)((((u64)(sg_dma_address(&chunk->page_list[nmap_index])+
2492                                                                 (page_index*4096))) >> 32)));
2493                                                 cur_pbl_index++;
2494                                                 page_count++;
2495                                         }
2496                                 }
2497                         }
2498                         enough_pages:
2499                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2500                                         " stag_key=0x%08x\n",
2501                                         stag_index, driver_key, stag_key);
2502                         stag = stag_index << 8;
2503                         stag |= driver_key;
2504                         stag += (u32)stag_key;
2505
2506                         iova_start = virt;
2507                         /* Make the leaf PBL the root if only one PBL */
2508                         if (root_pbl_index == 1) {
2509                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2510                         }
2511
2512                         if (single_page) {
2513                                 pbl_count = 0;
2514                         } else {
2515                                 pbl_count = root_pbl_index;
2516                                 first_dma_addr = 0;
2517                         }
2518                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2519                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2520                                         stag, (unsigned int)iova_start,
2521                                         (unsigned int)region_length, stag_index,
2522                                         (unsigned long long)region->length, pbl_count);
2523                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2524                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2525                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2526
2527                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2528
2529                         if (ret == 0) {
2530                                 nesmr->ibmr.rkey = stag;
2531                                 nesmr->ibmr.lkey = stag;
2532                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2533                                 ibmr = &nesmr->ibmr;
2534                         } else {
2535                                 ib_umem_release(region);
2536                                 kfree(nesmr);
2537                                 ibmr = ERR_PTR(-ENOMEM);
2538                         }
2539
2540                         reg_user_mr_err:
2541                         /* free the resources */
2542                         if (root_pbl_index == 1) {
2543                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2544                                                 vpbl.pbl_pbase);
2545                         } else {
2546                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2547                                         pci_free_consistent(nesdev->pcidev, 4096,
2548                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2549                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2550                                 }
2551                                 kfree(root_vpbl.leaf_vpbl);
2552                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2553                                                 root_vpbl.pbl_pbase);
2554                         }
2555
2556                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2557
2558                         return ibmr;
2559                 case IWNES_MEMREG_TYPE_QP:
2560                 case IWNES_MEMREG_TYPE_CQ:
2561                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2562                         if (!nespbl) {
2563                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2564                                 ib_umem_release(region);
2565                                 return ERR_PTR(-ENOMEM);
2566                         }
2567                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2568                         if (!nesmr) {
2569                                 ib_umem_release(region);
2570                                 kfree(nespbl);
2571                                 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2572                                 return ERR_PTR(-ENOMEM);
2573                         }
2574                         nesmr->region = region;
2575                         nes_ucontext = to_nesucontext(pd->uobject->context);
2576                         pbl_depth = region->length >> 12;
2577                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2578                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2579                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2580                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2581                         } else {
2582                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2583                         }
2584
2585                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2586                                         nespbl->pbl_size, pbl_depth);
2587                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2588                                         &nespbl->pbl_pbase);
2589                         if (!pbl) {
2590                                 ib_umem_release(region);
2591                                 kfree(nesmr);
2592                                 kfree(nespbl);
2593                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2594                                 return ERR_PTR(-ENOMEM);
2595                         }
2596
2597                         nespbl->pbl_vbase = (u64 *)pbl;
2598                         nespbl->user_base = start;
2599                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2600                                         " pbl_vbase=%p user_base=0x%lx\n",
2601                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2602                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2603
2604                         list_for_each_entry(chunk, &region->chunk_list, list) {
2605                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2606                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2607                                         chunk_pages += (sg_dma_len(&chunk->page_list[nmap_index]) & (4096-1)) ? 1 : 0;
2608                                         nespbl->page = sg_page(&chunk->page_list[0]);
2609                                         for (page_index=0; page_index<chunk_pages; page_index++) {
2610                                                 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2611                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2612                                                                 (page_index*4096)));
2613                                                 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2614                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2615                                                                 (page_index*4096)))>>32);
2616                                                 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2617                                                                 (unsigned long long)*pbl,
2618                                                                 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2619                                                 pbl++;
2620                                         }
2621                                 }
2622                         }
2623                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2624                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2625                         } else {
2626                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2627                         }
2628                         nesmr->ibmr.rkey = -1;
2629                         nesmr->ibmr.lkey = -1;
2630                         nesmr->mode = req.reg_type;
2631                         return &nesmr->ibmr;
2632         }
2633
2634         return ERR_PTR(-ENOSYS);
2635 }
2636
2637
2638 /**
2639  * nes_dereg_mr
2640  */
2641 static int nes_dereg_mr(struct ib_mr *ib_mr)
2642 {
2643         struct nes_mr *nesmr = to_nesmr(ib_mr);
2644         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2645         struct nes_device *nesdev = nesvnic->nesdev;
2646         struct nes_adapter *nesadapter = nesdev->nesadapter;
2647         struct nes_hw_cqp_wqe *cqp_wqe;
2648         struct nes_cqp_request *cqp_request;
2649         unsigned long flags;
2650         int ret;
2651         u16 major_code;
2652         u16 minor_code;
2653
2654         if (nesmr->region) {
2655                 ib_umem_release(nesmr->region);
2656         }
2657         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2658                 kfree(nesmr);
2659                 return 0;
2660         }
2661
2662         /* Deallocate the region with the adapter */
2663
2664         cqp_request = nes_get_cqp_request(nesdev);
2665         if (cqp_request == NULL) {
2666                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2667                 return -ENOMEM;
2668         }
2669         cqp_request->waiting = 1;
2670         cqp_wqe = &cqp_request->cqp_wqe;
2671
2672         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2673         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2674                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2675                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2676         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2677
2678         atomic_set(&cqp_request->refcount, 2);
2679         nes_post_cqp_request(nesdev, cqp_request);
2680
2681         /* Wait for CQP */
2682         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2683         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2684                         NES_EVENT_TIMEOUT);
2685         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2686                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2687                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2688
2689         major_code = cqp_request->major_code;
2690         minor_code = cqp_request->minor_code;
2691
2692         nes_put_cqp_request(nesdev, cqp_request);
2693
2694         if (!ret) {
2695                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2696                                 " ib_mr=%p, rkey = 0x%08X\n",
2697                                 ib_mr, ib_mr->rkey);
2698                 return -ETIME;
2699         } else if (major_code) {
2700                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2701                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2702                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2703                 return -EIO;
2704         }
2705
2706         if (nesmr->pbls_used != 0) {
2707                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2708                 if (nesmr->pbl_4k) {
2709                         nesadapter->free_4kpbl += nesmr->pbls_used;
2710                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2711                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2712                                         "exceeded the max(%u)\n",
2713                                         nesadapter->free_4kpbl,
2714                                         nesadapter->max_4kpbl);
2715                 } else {
2716                         nesadapter->free_256pbl += nesmr->pbls_used;
2717                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2718                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2719                                         "exceeded the max(%u)\n",
2720                                         nesadapter->free_256pbl,
2721                                         nesadapter->max_256pbl);
2722                 }
2723                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2724         }
2725         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2726                         (ib_mr->rkey & 0x0fffff00) >> 8);
2727
2728         kfree(nesmr);
2729
2730         return 0;
2731 }
2732
2733
2734 /**
2735  * show_rev
2736  */
2737 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2738                         char *buf)
2739 {
2740         struct nes_ib_device *nesibdev =
2741                         container_of(dev, struct nes_ib_device, ibdev.dev);
2742         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2743
2744         nes_debug(NES_DBG_INIT, "\n");
2745         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2746 }
2747
2748
2749 /**
2750  * show_fw_ver
2751  */
2752 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
2753                            char *buf)
2754 {
2755         struct nes_ib_device *nesibdev =
2756                         container_of(dev, struct nes_ib_device, ibdev.dev);
2757         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2758
2759         nes_debug(NES_DBG_INIT, "\n");
2760         return sprintf(buf, "%u.%u\n",
2761                 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
2762                 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
2763 }
2764
2765
2766 /**
2767  * show_hca
2768  */
2769 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2770                         char *buf)
2771 {
2772         nes_debug(NES_DBG_INIT, "\n");
2773         return sprintf(buf, "NES020\n");
2774 }
2775
2776
2777 /**
2778  * show_board
2779  */
2780 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2781                           char *buf)
2782 {
2783         nes_debug(NES_DBG_INIT, "\n");
2784         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2785 }
2786
2787
2788 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2789 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2790 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2791 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2792
2793 static struct device_attribute *nes_dev_attributes[] = {
2794         &dev_attr_hw_rev,
2795         &dev_attr_fw_ver,
2796         &dev_attr_hca_type,
2797         &dev_attr_board_id
2798 };
2799
2800
2801 /**
2802  * nes_query_qp
2803  */
2804 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2805                 int attr_mask, struct ib_qp_init_attr *init_attr)
2806 {
2807         struct nes_qp *nesqp = to_nesqp(ibqp);
2808
2809         nes_debug(NES_DBG_QP, "\n");
2810
2811         attr->qp_access_flags = 0;
2812         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2813         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2814         attr->cap.max_recv_sge = 1;
2815         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2816                 attr->cap.max_inline_data = 0;
2817         else
2818                 attr->cap.max_inline_data = 64;
2819
2820         init_attr->event_handler = nesqp->ibqp.event_handler;
2821         init_attr->qp_context = nesqp->ibqp.qp_context;
2822         init_attr->send_cq = nesqp->ibqp.send_cq;
2823         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2824         init_attr->srq = nesqp->ibqp.srq = nesqp->ibqp.srq;
2825         init_attr->cap = attr->cap;
2826
2827         return 0;
2828 }
2829
2830
2831 /**
2832  * nes_hw_modify_qp
2833  */
2834 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2835                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2836 {
2837         struct nes_hw_cqp_wqe *cqp_wqe;
2838         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2839         /* struct iw_cm_event cm_event; */
2840         struct nes_cqp_request *cqp_request;
2841         int ret;
2842         u16 major_code;
2843
2844         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2845                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2846
2847         cqp_request = nes_get_cqp_request(nesdev);
2848         if (cqp_request == NULL) {
2849                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2850                 return -ENOMEM;
2851         }
2852         if (wait_completion) {
2853                 cqp_request->waiting = 1;
2854         } else {
2855                 cqp_request->waiting = 0;
2856         }
2857         cqp_wqe = &cqp_request->cqp_wqe;
2858
2859         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2860                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2861         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2862                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2863         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2864         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2865         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2866
2867         /* If sending a terminate message, fill in the length (in words) */
2868         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2869             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2870                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2871                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2872         }
2873
2874         atomic_set(&cqp_request->refcount, 2);
2875         nes_post_cqp_request(nesdev, cqp_request);
2876
2877         /* Wait for CQP */
2878         if (wait_completion) {
2879                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2880                                 nesqp->hwqp.qp_id); */
2881                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2882                                 NES_EVENT_TIMEOUT);
2883                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2884                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2885                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2886                 major_code = cqp_request->major_code;
2887                 if (major_code) {
2888                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2889                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2890                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2891                                         cqp_request->minor_code, next_iwarp_state);
2892                 }
2893
2894                 nes_put_cqp_request(nesdev, cqp_request);
2895
2896                 if (!ret)
2897                         return -ETIME;
2898                 else if (major_code)
2899                         return -EIO;
2900                 else
2901                         return 0;
2902         } else {
2903                 return 0;
2904         }
2905 }
2906
2907
2908 /**
2909  * nes_modify_qp
2910  */
2911 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2912                 int attr_mask, struct ib_udata *udata)
2913 {
2914         struct nes_qp *nesqp = to_nesqp(ibqp);
2915         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2916         struct nes_device *nesdev = nesvnic->nesdev;
2917         /* u32 cqp_head; */
2918         /* u32 counter; */
2919         u32 next_iwarp_state = 0;
2920         int err;
2921         unsigned long qplockflags;
2922         int ret;
2923         u16 original_last_aeq;
2924         u8 issue_modify_qp = 0;
2925         u8 dont_wait = 0;
2926
2927         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2928                         " iwarp_state=0x%X, refcount=%d\n",
2929                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2930                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2931
2932         spin_lock_irqsave(&nesqp->lock, qplockflags);
2933
2934         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2935                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2936                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2937                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2938
2939         if (attr_mask & IB_QP_STATE) {
2940                 switch (attr->qp_state) {
2941                         case IB_QPS_INIT:
2942                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2943                                                 nesqp->hwqp.qp_id);
2944                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2945                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2946                                         return -EINVAL;
2947                                 }
2948                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2949                                 issue_modify_qp = 1;
2950                                 break;
2951                         case IB_QPS_RTR:
2952                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2953                                                 nesqp->hwqp.qp_id);
2954                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2955                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2956                                         return -EINVAL;
2957                                 }
2958                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2959                                 issue_modify_qp = 1;
2960                                 break;
2961                         case IB_QPS_RTS:
2962                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2963                                                 nesqp->hwqp.qp_id);
2964                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2965                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2966                                         return -EINVAL;
2967                                 }
2968                                 if (nesqp->cm_id == NULL) {
2969                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2970                                                         nesqp->hwqp.qp_id );
2971                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2972                                         return -EINVAL;
2973                                 }
2974                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2975                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2976                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2977                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2978                                 issue_modify_qp = 1;
2979                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2980                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2981                                 nesqp->hte_added = 1;
2982                                 break;
2983                         case IB_QPS_SQD:
2984                                 issue_modify_qp = 1;
2985                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2986                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2987                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2988                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2989                                         return 0;
2990                                 } else {
2991                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2992                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2993                                                                 " ignored due to current iWARP state\n",
2994                                                                 nesqp->hwqp.qp_id);
2995                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2996                                                 return -EINVAL;
2997                                         }
2998                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
2999                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3000                                                                 " already done based on hw state.\n",
3001                                                                 nesqp->hwqp.qp_id);
3002                                                 issue_modify_qp = 0;
3003                                         }
3004                                         switch (nesqp->hw_iwarp_state) {
3005                                                 case NES_AEQE_IWARP_STATE_CLOSING:
3006                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3007                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
3008                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3009                                                         break;
3010                                                 case NES_AEQE_IWARP_STATE_ERROR:
3011                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3012                                                         break;
3013                                                 default:
3014                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3015                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
3016                                                         break;
3017                                         }
3018                                 }
3019                                 break;
3020                         case IB_QPS_SQE:
3021                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
3022                                                 nesqp->hwqp.qp_id);
3023                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
3024                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3025                                         return -EINVAL;
3026                                 }
3027                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3028                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3029                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
3030                                 issue_modify_qp = 1;
3031                                 break;
3032                         case IB_QPS_ERR:
3033                         case IB_QPS_RESET:
3034                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
3035                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3036                                         return -EINVAL;
3037                                 }
3038                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
3039                                                 nesqp->hwqp.qp_id);
3040                                 if (nesqp->term_flags)
3041                                         del_timer(&nesqp->terminate_timer);
3042
3043                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3044                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3045                                         if (nesqp->hte_added) {
3046                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
3047                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
3048                                                 nesqp->hte_added = 0;
3049                                         }
3050                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
3051                                                 (nesdev->iw_status) &&
3052                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
3053                                         next_iwarp_state |= NES_CQP_QP_RESET;
3054                                 } else {
3055                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
3056                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
3057                                         dont_wait = 1;
3058                                 }
3059                                 issue_modify_qp = 1;
3060                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
3061                                 break;
3062                         default:
3063                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3064                                 return -EINVAL;
3065                                 break;
3066                 }
3067
3068                 nesqp->ibqp_state = attr->qp_state;
3069                 if (((nesqp->iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) ==
3070                                 (u32)NES_CQP_QP_IWARP_STATE_RTS) &&
3071                                 ((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) >
3072                                 (u32)NES_CQP_QP_IWARP_STATE_RTS)) {
3073                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3074                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3075                                         nesqp->iwarp_state);
3076                 } else {
3077                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3078                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3079                                         nesqp->iwarp_state);
3080                 }
3081         }
3082
3083         if (attr_mask & IB_QP_ACCESS_FLAGS) {
3084                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
3085                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3086                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3087                         issue_modify_qp = 1;
3088                 }
3089                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
3090                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
3091                         issue_modify_qp = 1;
3092                 }
3093                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
3094                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
3095                         issue_modify_qp = 1;
3096                 }
3097                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
3098                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
3099                         issue_modify_qp = 1;
3100                 }
3101
3102                 if (nesqp->user_mode) {
3103                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3104                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3105                         issue_modify_qp = 1;
3106                 }
3107         }
3108
3109         original_last_aeq = nesqp->last_aeq;
3110         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3111
3112         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
3113
3114         ret = 0;
3115
3116
3117         if (issue_modify_qp) {
3118                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
3119                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
3120                 if (ret)
3121                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
3122                                         " failed for QP%u.\n",
3123                                         next_iwarp_state, nesqp->hwqp.qp_id);
3124
3125         }
3126
3127         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
3128                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
3129                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3130                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3131                                 original_last_aeq, nesqp->last_aeq);
3132                 if ((!ret) ||
3133                                 ((original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) &&
3134                                 (ret))) {
3135                         if (dont_wait) {
3136                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
3137                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
3138                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3139                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3140                                                         original_last_aeq, nesqp->last_aeq);
3141                                         /* this one is for the cm_disconnect thread */
3142                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
3143                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
3144                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
3145                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3146                                         nes_cm_disconn(nesqp);
3147                                 } else {
3148                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
3149                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3150                                 }
3151                         } else {
3152                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
3153                                 if (nesqp->cm_id) {
3154                                         /* These two are for the timer thread */
3155                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3156                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
3157                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3158                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
3159                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
3160                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3161                                                                 original_last_aeq, nesqp->last_aeq);
3162                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3163                                         }
3164                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3165                                 } else {
3166                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3167                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3168                                                         " need ae to finish up, original_last_aeq = 0x%04X."
3169                                                         " last_aeq = 0x%04X.\n",
3170                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3171                                                         original_last_aeq, nesqp->last_aeq);
3172                                 }
3173                         }
3174                 } else {
3175                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3176                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3177                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3178                                         original_last_aeq, nesqp->last_aeq);
3179                 }
3180         } else {
3181                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3182                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3183                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3184                                 original_last_aeq, nesqp->last_aeq);
3185         }
3186
3187         err = 0;
3188
3189         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3190                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3191
3192         return err;
3193 }
3194
3195
3196 /**
3197  * nes_muticast_attach
3198  */
3199 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3200 {
3201         nes_debug(NES_DBG_INIT, "\n");
3202         return -ENOSYS;
3203 }
3204
3205
3206 /**
3207  * nes_multicast_detach
3208  */
3209 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3210 {
3211         nes_debug(NES_DBG_INIT, "\n");
3212         return -ENOSYS;
3213 }
3214
3215
3216 /**
3217  * nes_process_mad
3218  */
3219 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3220                 u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
3221                 struct ib_mad *in_mad, struct ib_mad *out_mad)
3222 {
3223         nes_debug(NES_DBG_INIT, "\n");
3224         return -ENOSYS;
3225 }
3226
3227 static inline void
3228 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3229 {
3230         int sge_index;
3231         int total_payload_length = 0;
3232         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3233                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3234                         ib_wr->sg_list[sge_index].addr);
3235                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3236                         ib_wr->sg_list[sge_index].length);
3237                 if (uselkey)
3238                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3239                                                 (ib_wr->sg_list[sge_index].lkey));
3240                 else
3241                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3242
3243                 total_payload_length += ib_wr->sg_list[sge_index].length;
3244         }
3245         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3246                         total_payload_length);
3247         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3248                                 total_payload_length);
3249 }
3250
3251 /**
3252  * nes_post_send
3253  */
3254 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3255                 struct ib_send_wr **bad_wr)
3256 {
3257         u64 u64temp;
3258         unsigned long flags = 0;
3259         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3260         struct nes_device *nesdev = nesvnic->nesdev;
3261         struct nes_qp *nesqp = to_nesqp(ibqp);
3262         struct nes_hw_qp_wqe *wqe;
3263         int err = 0;
3264         u32 qsize = nesqp->hwqp.sq_size;
3265         u32 head;
3266         u32 wqe_misc = 0;
3267         u32 wqe_count = 0;
3268         u32 counter;
3269
3270         if (nesqp->ibqp_state > IB_QPS_RTS) {
3271                 err = -EINVAL;
3272                 goto out;
3273         }
3274
3275         spin_lock_irqsave(&nesqp->lock, flags);
3276
3277         head = nesqp->hwqp.sq_head;
3278
3279         while (ib_wr) {
3280                 /* Check for QP error */
3281                 if (nesqp->term_flags) {
3282                         err = -EINVAL;
3283                         break;
3284                 }
3285
3286                 /* Check for SQ overflow */
3287                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3288                         err = -ENOMEM;
3289                         break;
3290                 }
3291
3292                 wqe = &nesqp->hwqp.sq_vbase[head];
3293                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3294                                 nesqp->hwqp.qp_id, wqe, head); */
3295                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3296                 u64temp = (u64)(ib_wr->wr_id);
3297                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3298                                         u64temp);
3299                 switch (ib_wr->opcode) {
3300                 case IB_WR_SEND:
3301                 case IB_WR_SEND_WITH_INV:
3302                         if (IB_WR_SEND == ib_wr->opcode) {
3303                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3304                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3305                                 else
3306                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3307                         } else {
3308                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3309                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3310                                 else
3311                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3312
3313                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3314                                                     ib_wr->ex.invalidate_rkey);
3315                         }
3316
3317                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3318                                 err = -EINVAL;
3319                                 break;
3320                         }
3321
3322                         if (ib_wr->send_flags & IB_SEND_FENCE)
3323                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3324
3325                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3326                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3327                              (ib_wr->sg_list[0].length <= 64)) {
3328                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3329                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3330                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3331                                                     ib_wr->sg_list[0].length);
3332                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3333                         } else {
3334                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3335                         }
3336
3337                         break;
3338                 case IB_WR_RDMA_WRITE:
3339                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3340                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3341                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3342                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3343                                 err = -EINVAL;
3344                                 break;
3345                         }
3346
3347                         if (ib_wr->send_flags & IB_SEND_FENCE)
3348                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3349
3350                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3351                                             ib_wr->wr.rdma.rkey);
3352                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3353                                             ib_wr->wr.rdma.remote_addr);
3354
3355                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3356                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3357                              (ib_wr->sg_list[0].length <= 64)) {
3358                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3359                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3360                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3361                                                     ib_wr->sg_list[0].length);
3362                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3363                         } else {
3364                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3365                         }
3366
3367                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3368                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3369                         break;
3370                 case IB_WR_RDMA_READ:
3371                 case IB_WR_RDMA_READ_WITH_INV:
3372                         /* iWARP only supports 1 sge for RDMA reads */
3373                         if (ib_wr->num_sge > 1) {
3374                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3375                                           ib_wr->num_sge);
3376                                 err = -EINVAL;
3377                                 break;
3378                         }
3379                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3380                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3381                         } else {
3382                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3383                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3384                                                     ib_wr->ex.invalidate_rkey);
3385                         }
3386
3387                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3388                                             ib_wr->wr.rdma.remote_addr);
3389                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3390                                             ib_wr->wr.rdma.rkey);
3391                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3392                                             ib_wr->sg_list->length);
3393                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3394                                             ib_wr->sg_list->addr);
3395                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3396                                             ib_wr->sg_list->lkey);
3397                         break;
3398                 case IB_WR_LOCAL_INV:
3399                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3400                         set_wqe_32bit_value(wqe->wqe_words,
3401                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3402                                             ib_wr->ex.invalidate_rkey);
3403                         break;
3404                 case IB_WR_FAST_REG_MR:
3405                 {
3406                         int i;
3407                         int flags = ib_wr->wr.fast_reg.access_flags;
3408                         struct nes_ib_fast_reg_page_list *pnesfrpl =
3409                                 container_of(ib_wr->wr.fast_reg.page_list,
3410                                              struct nes_ib_fast_reg_page_list,
3411                                              ibfrpl);
3412                         u64 *src_page_list = pnesfrpl->ibfrpl.page_list;
3413                         u64 *dst_page_list = pnesfrpl->nes_wqe_pbl.kva;
3414
3415                         if (ib_wr->wr.fast_reg.page_list_len >
3416                             (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3417                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3418                                 err = -EINVAL;
3419                                 break;
3420                         }
3421                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3422                         set_wqe_64bit_value(wqe->wqe_words,
3423                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3424                                             ib_wr->wr.fast_reg.iova_start);
3425                         set_wqe_32bit_value(wqe->wqe_words,
3426                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3427                                             ib_wr->wr.fast_reg.length);
3428                         set_wqe_32bit_value(wqe->wqe_words,
3429                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3430                                             ib_wr->wr.fast_reg.rkey);
3431                         /* Set page size: */
3432                         if (ib_wr->wr.fast_reg.page_shift == 12) {
3433                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3434                         } else if (ib_wr->wr.fast_reg.page_shift == 21) {
3435                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3436                         } else {
3437                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3438                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3439                                 err = -EINVAL;
3440                                 break;
3441                         }
3442                         /* Set access_flags */
3443                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3444                         if (flags & IB_ACCESS_LOCAL_WRITE)
3445                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3446
3447                         if (flags & IB_ACCESS_REMOTE_WRITE)
3448                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3449
3450                         if (flags & IB_ACCESS_REMOTE_READ)
3451                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3452
3453                         if (flags & IB_ACCESS_MW_BIND)
3454                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3455
3456                         /* Fill in PBL info: */
3457                         if (ib_wr->wr.fast_reg.page_list_len >
3458                             pnesfrpl->ibfrpl.max_page_list_len) {
3459                                 nes_debug(NES_DBG_IW_TX, "Invalid page list length,"
3460                                           " ib_wr=%p, value=%u, max=%u\n",
3461                                           ib_wr, ib_wr->wr.fast_reg.page_list_len,
3462                                           pnesfrpl->ibfrpl.max_page_list_len);
3463                                 err = -EINVAL;
3464                                 break;
3465                         }
3466
3467                         set_wqe_64bit_value(wqe->wqe_words,
3468                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3469                                             pnesfrpl->nes_wqe_pbl.paddr);
3470
3471                         set_wqe_32bit_value(wqe->wqe_words,
3472                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3473                                             ib_wr->wr.fast_reg.page_list_len * 8);
3474
3475                         for (i = 0; i < ib_wr->wr.fast_reg.page_list_len; i++)
3476                                 dst_page_list[i] = cpu_to_le64(src_page_list[i]);
3477
3478                         nes_debug(NES_DBG_IW_TX, "SQ_FMR: iova_start: %llx, "
3479                                   "length: %d, rkey: %0x, pgl_paddr: %llx, "
3480                                   "page_list_len: %u, wqe_misc: %x\n",
3481                                   (unsigned long long) ib_wr->wr.fast_reg.iova_start,
3482                                   ib_wr->wr.fast_reg.length,
3483                                   ib_wr->wr.fast_reg.rkey,
3484                                   (unsigned long long) pnesfrpl->nes_wqe_pbl.paddr,
3485                                   ib_wr->wr.fast_reg.page_list_len,
3486                                   wqe_misc);
3487                         break;
3488                 }
3489                 default:
3490                         /* error */
3491                         err = -EINVAL;
3492                         break;
3493                 }
3494
3495                 if (err)
3496                         break;
3497
3498                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3499                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3500
3501                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3502
3503                 ib_wr = ib_wr->next;
3504                 head++;
3505                 wqe_count++;
3506                 if (head >= qsize)
3507                         head = 0;
3508
3509         }
3510
3511         nesqp->hwqp.sq_head = head;
3512         barrier();
3513         while (wqe_count) {
3514                 counter = min(wqe_count, ((u32)255));
3515                 wqe_count -= counter;
3516                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3517                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3518         }
3519
3520         spin_unlock_irqrestore(&nesqp->lock, flags);
3521
3522 out:
3523         if (err)
3524                 *bad_wr = ib_wr;
3525         return err;
3526 }
3527
3528
3529 /**
3530  * nes_post_recv
3531  */
3532 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3533                 struct ib_recv_wr **bad_wr)
3534 {
3535         u64 u64temp;
3536         unsigned long flags = 0;
3537         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3538         struct nes_device *nesdev = nesvnic->nesdev;
3539         struct nes_qp *nesqp = to_nesqp(ibqp);
3540         struct nes_hw_qp_wqe *wqe;
3541         int err = 0;
3542         int sge_index;
3543         u32 qsize = nesqp->hwqp.rq_size;
3544         u32 head;
3545         u32 wqe_count = 0;
3546         u32 counter;
3547         u32 total_payload_length;
3548
3549         if (nesqp->ibqp_state > IB_QPS_RTS) {
3550                 err = -EINVAL;
3551                 goto out;
3552         }
3553
3554         spin_lock_irqsave(&nesqp->lock, flags);
3555
3556         head = nesqp->hwqp.rq_head;
3557
3558         while (ib_wr) {
3559                 /* Check for QP error */
3560                 if (nesqp->term_flags) {
3561                         err = -EINVAL;
3562                         break;
3563                 }
3564
3565                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3566                         err = -EINVAL;
3567                         break;
3568                 }
3569                 /* Check for RQ overflow */
3570                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3571                         err = -ENOMEM;
3572                         break;
3573                 }
3574
3575                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3576                 wqe = &nesqp->hwqp.rq_vbase[head];
3577
3578                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3579                                 nesqp->hwqp.qp_id, wqe, head); */
3580                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3581                 u64temp = (u64)(ib_wr->wr_id);
3582                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3583                                         u64temp);
3584                 total_payload_length = 0;
3585                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3586                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3587                                         ib_wr->sg_list[sge_index].addr);
3588                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3589                                         ib_wr->sg_list[sge_index].length);
3590                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3591                                         ib_wr->sg_list[sge_index].lkey);
3592
3593                         total_payload_length += ib_wr->sg_list[sge_index].length;
3594                 }
3595                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3596                                         total_payload_length);
3597
3598                 ib_wr = ib_wr->next;
3599                 head++;
3600                 wqe_count++;
3601                 if (head >= qsize)
3602                         head = 0;
3603         }
3604
3605         nesqp->hwqp.rq_head = head;
3606         barrier();
3607         while (wqe_count) {
3608                 counter = min(wqe_count, ((u32)255));
3609                 wqe_count -= counter;
3610                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3611         }
3612
3613         spin_unlock_irqrestore(&nesqp->lock, flags);
3614
3615 out:
3616         if (err)
3617                 *bad_wr = ib_wr;
3618         return err;
3619 }
3620
3621
3622 /**
3623  * nes_poll_cq
3624  */
3625 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3626 {
3627         u64 u64temp;
3628         u64 wrid;
3629         unsigned long flags = 0;
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         struct nes_qp *nesqp;
3634         struct nes_hw_cqe cqe;
3635         u32 head;
3636         u32 wq_tail = 0;
3637         u32 cq_size;
3638         u32 cqe_count = 0;
3639         u32 wqe_index;
3640         u32 u32temp;
3641         u32 move_cq_head = 1;
3642         u32 err_code;
3643
3644         nes_debug(NES_DBG_CQ, "\n");
3645
3646         spin_lock_irqsave(&nescq->lock, flags);
3647
3648         head = nescq->hw_cq.cq_head;
3649         cq_size = nescq->hw_cq.cq_size;
3650
3651         while (cqe_count < num_entries) {
3652                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3653                                 NES_CQE_VALID) == 0)
3654                         break;
3655
3656                 /*
3657                  * Make sure we read CQ entry contents *after*
3658                  * we've checked the valid bit.
3659                  */
3660                 rmb();
3661
3662                 cqe = nescq->hw_cq.cq_vbase[head];
3663                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3664                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3665                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3666                 /* parse CQE, get completion context from WQE (either rq or sq) */
3667                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3668                                 ((u64)u32temp);
3669
3670                 if (u64temp) {
3671                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3672                         memset(entry, 0, sizeof *entry);
3673                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3674                                 entry->status = IB_WC_SUCCESS;
3675                         } else {
3676                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3677                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3678                                         entry->status = err_code & 0x0000ffff;
3679
3680                                         /* The rest of the cqe's will be marked as flushed */
3681                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3682                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3683                                                             NES_IWARP_CQE_MINOR_FLUSH);
3684                                 } else
3685                                         entry->status = IB_WC_WR_FLUSH_ERR;
3686                         }
3687
3688                         entry->qp = &nesqp->ibqp;
3689                         entry->src_qp = nesqp->hwqp.qp_id;
3690
3691                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3692                                 if (nesqp->skip_lsmm) {
3693                                         nesqp->skip_lsmm = 0;
3694                                         nesqp->hwqp.sq_tail++;
3695                                 }
3696
3697                                 /* Working on a SQ Completion*/
3698                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3699                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3700                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3701                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3702                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3703                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3704
3705                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3706                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3707                                         case NES_IWARP_SQ_OP_RDMAW:
3708                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3709                                                 entry->opcode = IB_WC_RDMA_WRITE;
3710                                                 break;
3711                                         case NES_IWARP_SQ_OP_RDMAR:
3712                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3713                                                 entry->opcode = IB_WC_RDMA_READ;
3714                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3715                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3716                                                 break;
3717                                         case NES_IWARP_SQ_OP_SENDINV:
3718                                         case NES_IWARP_SQ_OP_SENDSEINV:
3719                                         case NES_IWARP_SQ_OP_SEND:
3720                                         case NES_IWARP_SQ_OP_SENDSE:
3721                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3722                                                 entry->opcode = IB_WC_SEND;
3723                                                 break;
3724                                         case NES_IWARP_SQ_OP_LOCINV:
3725                                                 entry->opcode = IB_WR_LOCAL_INV;
3726                                                 break;
3727                                         case NES_IWARP_SQ_OP_FAST_REG:
3728                                                 entry->opcode = IB_WC_FAST_REG_MR;
3729                                                 break;
3730                                 }
3731
3732                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3733                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3734                                         move_cq_head = 0;
3735                                         wq_tail = nesqp->hwqp.sq_tail;
3736                                 }
3737                         } else {
3738                                 /* Working on a RQ Completion*/
3739                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3740                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3741                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3742                                         entry->opcode = IB_WC_RECV;
3743
3744                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3745                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3746                                         move_cq_head = 0;
3747                                         wq_tail = nesqp->hwqp.rq_tail;
3748                                 }
3749                         }
3750
3751                         entry->wr_id = wrid;
3752                         entry++;
3753                         cqe_count++;
3754                 }
3755
3756                 if (move_cq_head) {
3757                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3758                         if (++head >= cq_size)
3759                                 head = 0;
3760                         nescq->polled_completions++;
3761
3762                         if ((nescq->polled_completions > (cq_size / 2)) ||
3763                                         (nescq->polled_completions == 255)) {
3764                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3765                                         " are pending %u of %u.\n",
3766                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3767                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3768                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3769                                 nescq->polled_completions = 0;
3770                         }
3771                 } else {
3772                         /* Update the wqe index and set status to flush */
3773                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3774                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3775                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3776                                 cpu_to_le32(wqe_index);
3777                         move_cq_head = 1; /* ready for next pass */
3778                 }
3779         }
3780
3781         if (nescq->polled_completions) {
3782                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3783                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3784                 nescq->polled_completions = 0;
3785         }
3786
3787         nescq->hw_cq.cq_head = head;
3788         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3789                         cqe_count, nescq->hw_cq.cq_number);
3790
3791         spin_unlock_irqrestore(&nescq->lock, flags);
3792
3793         return cqe_count;
3794 }
3795
3796
3797 /**
3798  * nes_req_notify_cq
3799  */
3800 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3801                 {
3802         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3803         struct nes_device *nesdev = nesvnic->nesdev;
3804         struct nes_cq *nescq = to_nescq(ibcq);
3805         u32 cq_arm;
3806
3807         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3808                         nescq->hw_cq.cq_number);
3809
3810         cq_arm = nescq->hw_cq.cq_number;
3811         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3812                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3813         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3814                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3815         else
3816                 return -EINVAL;
3817
3818         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3819         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3820
3821         return 0;
3822 }
3823
3824
3825 /**
3826  * nes_init_ofa_device
3827  */
3828 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3829 {
3830         struct nes_ib_device *nesibdev;
3831         struct nes_vnic *nesvnic = netdev_priv(netdev);
3832         struct nes_device *nesdev = nesvnic->nesdev;
3833
3834         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3835         if (nesibdev == NULL) {
3836                 return NULL;
3837         }
3838         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3839         nesibdev->ibdev.owner = THIS_MODULE;
3840
3841         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3842         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3843         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3844
3845         nesibdev->ibdev.uverbs_cmd_mask =
3846                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3847                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3848                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3849                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3850                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3851                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3852                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3853                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3854                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3855                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3856                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3857                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3858                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3859                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3860                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3861                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3862                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3863                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3864                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3865                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3866                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3867                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3868
3869         nesibdev->ibdev.phys_port_cnt = 1;
3870         nesibdev->ibdev.num_comp_vectors = 1;
3871         nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3872         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3873         nesibdev->ibdev.query_device = nes_query_device;
3874         nesibdev->ibdev.query_port = nes_query_port;
3875         nesibdev->ibdev.query_pkey = nes_query_pkey;
3876         nesibdev->ibdev.query_gid = nes_query_gid;
3877         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3878         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3879         nesibdev->ibdev.mmap = nes_mmap;
3880         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3881         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3882         nesibdev->ibdev.create_ah = nes_create_ah;
3883         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3884         nesibdev->ibdev.create_qp = nes_create_qp;
3885         nesibdev->ibdev.modify_qp = nes_modify_qp;
3886         nesibdev->ibdev.query_qp = nes_query_qp;
3887         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3888         nesibdev->ibdev.create_cq = nes_create_cq;
3889         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3890         nesibdev->ibdev.poll_cq = nes_poll_cq;
3891         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3892         nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
3893         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3894         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3895         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3896         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3897         nesibdev->ibdev.bind_mw = nes_bind_mw;
3898
3899         nesibdev->ibdev.alloc_fast_reg_mr = nes_alloc_fast_reg_mr;
3900         nesibdev->ibdev.alloc_fast_reg_page_list = nes_alloc_fast_reg_page_list;
3901         nesibdev->ibdev.free_fast_reg_page_list = nes_free_fast_reg_page_list;
3902
3903         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3904         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3905         nesibdev->ibdev.process_mad = nes_process_mad;
3906
3907         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3908         nesibdev->ibdev.post_send = nes_post_send;
3909         nesibdev->ibdev.post_recv = nes_post_recv;
3910
3911         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3912         if (nesibdev->ibdev.iwcm == NULL) {
3913                 ib_dealloc_device(&nesibdev->ibdev);
3914                 return NULL;
3915         }
3916         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3917         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3918         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3919         nesibdev->ibdev.iwcm->connect = nes_connect;
3920         nesibdev->ibdev.iwcm->accept = nes_accept;
3921         nesibdev->ibdev.iwcm->reject = nes_reject;
3922         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3923         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3924
3925         return nesibdev;
3926 }
3927
3928
3929 /**
3930  * nes_handle_delayed_event
3931  */
3932 static void nes_handle_delayed_event(unsigned long data)
3933 {
3934         struct nes_vnic *nesvnic = (void *) data;
3935
3936         if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3937                 struct ib_event event;
3938
3939                 event.device = &nesvnic->nesibdev->ibdev;
3940                 if (!event.device)
3941                         goto stop_timer;
3942                 event.event = nesvnic->delayed_event;
3943                 event.element.port_num = nesvnic->logical_port + 1;
3944                 ib_dispatch_event(&event);
3945         }
3946
3947 stop_timer:
3948         nesvnic->event_timer.function = NULL;
3949 }
3950
3951
3952 void  nes_port_ibevent(struct nes_vnic *nesvnic)
3953 {
3954         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3955         struct nes_device *nesdev = nesvnic->nesdev;
3956         struct ib_event event;
3957         event.device = &nesibdev->ibdev;
3958         event.element.port_num = nesvnic->logical_port + 1;
3959         event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3960
3961         if (!nesvnic->event_timer.function) {
3962                 ib_dispatch_event(&event);
3963                 nesvnic->last_dispatched_event = event.event;
3964                 nesvnic->event_timer.function = nes_handle_delayed_event;
3965                 nesvnic->event_timer.data = (unsigned long) nesvnic;
3966                 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3967                 add_timer(&nesvnic->event_timer);
3968         } else {
3969                 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3970         }
3971         nesvnic->delayed_event = event.event;
3972 }
3973
3974
3975 /**
3976  * nes_destroy_ofa_device
3977  */
3978 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3979 {
3980         if (nesibdev == NULL)
3981                 return;
3982
3983         nes_unregister_ofa_device(nesibdev);
3984
3985         kfree(nesibdev->ibdev.iwcm);
3986         ib_dealloc_device(&nesibdev->ibdev);
3987 }
3988
3989
3990 /**
3991  * nes_register_ofa_device
3992  */
3993 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3994 {
3995         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3996         struct nes_device *nesdev = nesvnic->nesdev;
3997         struct nes_adapter *nesadapter = nesdev->nesadapter;
3998         int i, ret;
3999
4000         ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
4001         if (ret) {
4002                 return ret;
4003         }
4004
4005         /* Get the resources allocated to this device */
4006         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
4007         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
4008         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
4009         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
4010
4011         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4012                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4013                 if (ret) {
4014                         while (i > 0) {
4015                                 i--;
4016                                 device_remove_file(&nesibdev->ibdev.dev,
4017                                                    nes_dev_attributes[i]);
4018                         }
4019                         ib_unregister_device(&nesibdev->ibdev);
4020                         return ret;
4021                 }
4022         }
4023
4024         nesvnic->of_device_registered = 1;
4025
4026         return 0;
4027 }
4028
4029
4030 /**
4031  * nes_unregister_ofa_device
4032  */
4033 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
4034 {
4035         struct nes_vnic *nesvnic = nesibdev->nesvnic;
4036         int i;
4037
4038         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4039                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4040         }
4041
4042         if (nesvnic->of_device_registered) {
4043                 ib_unregister_device(&nesibdev->ibdev);
4044         }
4045
4046         nesvnic->of_device_registered = 0;
4047 }