drivers/infiniband/hw/nes/nes_verbs.c

   1 /*
   2  * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/random.h>
  37 #include <linux/highmem.h>
  38 #include <linux/slab.h>
  39 #include <asm/byteorder.h>
  40
  41 #include <rdma/ib_verbs.h>
  42 #include <rdma/iw_cm.h>
  43 #include <rdma/ib_user_verbs.h>
  44
  45 #include "nes.h"
  46
  47 #include <rdma/ib_umem.h>
  48
  49 atomic_t mod_qp_timouts;
  50 atomic_t qps_created;
  51 atomic_t sw_qps_destroyed;
  52
  53 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
  54
  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, NES_RESOURCE_MW);
  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, NES_RESOURCE_FAST_MR);
 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 = IB_SPEED_SDR;
 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, NES_RESOURCE_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, NES_RESOURCE_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 = 0;
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         nes_rem_ref(&nesqp->ibqp);
1515         return 0;
1516 }
1517
1518
1519 /**
1520  * nes_create_cq
1521  */
1522 static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
1523                 int comp_vector,
1524                 struct ib_ucontext *context, struct ib_udata *udata)
1525 {
1526         u64 u64temp;
1527         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1528         struct nes_device *nesdev = nesvnic->nesdev;
1529         struct nes_adapter *nesadapter = nesdev->nesadapter;
1530         struct nes_cq *nescq;
1531         struct nes_ucontext *nes_ucontext = NULL;
1532         struct nes_cqp_request *cqp_request;
1533         void *mem = NULL;
1534         struct nes_hw_cqp_wqe *cqp_wqe;
1535         struct nes_pbl *nespbl = NULL;
1536         struct nes_create_cq_req req;
1537         struct nes_create_cq_resp resp;
1538         u32 cq_num = 0;
1539         u32 opcode = 0;
1540         u32 pbl_entries = 1;
1541         int err;
1542         unsigned long flags;
1543         int ret;
1544
1545         if (entries > nesadapter->max_cqe)
1546                 return ERR_PTR(-EINVAL);
1547
1548         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1549                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1550         if (err) {
1551                 return ERR_PTR(err);
1552         }
1553
1554         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1555         if (!nescq) {
1556                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1557                 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1558                 return ERR_PTR(-ENOMEM);
1559         }
1560
1561         nescq->hw_cq.cq_size = max(entries + 1, 5);
1562         nescq->hw_cq.cq_number = cq_num;
1563         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1564
1565
1566         if (context) {
1567                 nes_ucontext = to_nesucontext(context);
1568                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1569                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1570                         kfree(nescq);
1571                         return ERR_PTR(-EFAULT);
1572                 }
1573                 nesvnic->mcrq_ucontext = nes_ucontext;
1574                 nes_ucontext->mcrqf = req.mcrqf;
1575                 if (nes_ucontext->mcrqf) {
1576                         if (nes_ucontext->mcrqf & 0x80000000)
1577                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1578                         else if (nes_ucontext->mcrqf & 0x40000000)
1579                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1580                         else
1581                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1582                         nescq->mcrqf = nes_ucontext->mcrqf;
1583                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1584                 }
1585                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1586                                 (unsigned long)req.user_cq_buffer, entries);
1587                 err = 1;
1588                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1589                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1590                                 list_del(&nespbl->list);
1591                                 err = 0;
1592                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1593                                                 nespbl);
1594                                 break;
1595                         }
1596                 }
1597                 if (err) {
1598                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1599                         kfree(nescq);
1600                         return ERR_PTR(-EFAULT);
1601                 }
1602
1603                 pbl_entries = nespbl->pbl_size >> 3;
1604                 nescq->cq_mem_size = 0;
1605         } else {
1606                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1607                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1608                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1609
1610                 /* allocate the physical buffer space */
1611                 mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1612                                 &nescq->hw_cq.cq_pbase);
1613                 if (!mem) {
1614                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1615                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1616                         kfree(nescq);
1617                         return ERR_PTR(-ENOMEM);
1618                 }
1619
1620                 memset(mem, 0, nescq->cq_mem_size);
1621                 nescq->hw_cq.cq_vbase = mem;
1622                 nescq->hw_cq.cq_head = 0;
1623                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1624                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1625                                 (u32)nescq->hw_cq.cq_pbase);
1626         }
1627
1628         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1629         spin_lock_init(&nescq->lock);
1630
1631         /* send CreateCQ request to CQP */
1632         cqp_request = nes_get_cqp_request(nesdev);
1633         if (cqp_request == NULL) {
1634                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1635                 if (!context)
1636                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1637                                         nescq->hw_cq.cq_pbase);
1638                 else {
1639                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1640                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1641                         kfree(nespbl);
1642                 }
1643
1644                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1645                 kfree(nescq);
1646                 return ERR_PTR(-ENOMEM);
1647         }
1648         cqp_request->waiting = 1;
1649         cqp_wqe = &cqp_request->cqp_wqe;
1650
1651         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1652                         NES_CQP_CQ_CHK_OVERFLOW |
1653                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1654
1655         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1656
1657         if (pbl_entries != 1) {
1658                 if (pbl_entries > 32) {
1659                         /* use 4k pbl */
1660                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1661                         if (nesadapter->free_4kpbl == 0) {
1662                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1663                                 nes_free_cqp_request(nesdev, cqp_request);
1664                                 if (!context)
1665                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1666                                                         nescq->hw_cq.cq_pbase);
1667                                 else {
1668                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1669                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1670                                         kfree(nespbl);
1671                                 }
1672                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1673                                 kfree(nescq);
1674                                 return ERR_PTR(-ENOMEM);
1675                         } else {
1676                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1677                                 nescq->virtual_cq = 2;
1678                                 nesadapter->free_4kpbl--;
1679                         }
1680                 } else {
1681                         /* use 256 byte pbl */
1682                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1683                         if (nesadapter->free_256pbl == 0) {
1684                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1685                                 nes_free_cqp_request(nesdev, cqp_request);
1686                                 if (!context)
1687                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1688                                                         nescq->hw_cq.cq_pbase);
1689                                 else {
1690                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1691                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1692                                         kfree(nespbl);
1693                                 }
1694                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1695                                 kfree(nescq);
1696                                 return ERR_PTR(-ENOMEM);
1697                         } else {
1698                                 opcode |= NES_CQP_CQ_VIRT;
1699                                 nescq->virtual_cq = 1;
1700                                 nesadapter->free_256pbl--;
1701                         }
1702                 }
1703         }
1704
1705         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1706
1707         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1708         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1709         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1710                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1711
1712         if (context) {
1713                 if (pbl_entries != 1)
1714                         u64temp = (u64)nespbl->pbl_pbase;
1715                 else
1716                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1717                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1718                                 nes_ucontext->mmap_db_index[0]);
1719         } else {
1720                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1721                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1722         }
1723         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1724         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1725         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1726         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1727                         cpu_to_le32((u32)(u64temp >> 1));
1728         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1729                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1730
1731         atomic_set(&cqp_request->refcount, 2);
1732         nes_post_cqp_request(nesdev, cqp_request);
1733
1734         /* Wait for CQP */
1735         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1736                         nescq->hw_cq.cq_number);
1737         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1738                         NES_EVENT_TIMEOUT * 2);
1739         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1740                         nescq->hw_cq.cq_number, ret);
1741         if ((!ret) || (cqp_request->major_code)) {
1742                 nes_put_cqp_request(nesdev, cqp_request);
1743                 if (!context)
1744                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1745                                         nescq->hw_cq.cq_pbase);
1746                 else {
1747                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1748                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1749                         kfree(nespbl);
1750                 }
1751                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1752                 kfree(nescq);
1753                 return ERR_PTR(-EIO);
1754         }
1755         nes_put_cqp_request(nesdev, cqp_request);
1756
1757         if (context) {
1758                 /* free the nespbl */
1759                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1760                                 nespbl->pbl_pbase);
1761                 kfree(nespbl);
1762                 resp.cq_id = nescq->hw_cq.cq_number;
1763                 resp.cq_size = nescq->hw_cq.cq_size;
1764                 resp.mmap_db_index = 0;
1765                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
1766                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1767                         kfree(nescq);
1768                         return ERR_PTR(-EFAULT);
1769                 }
1770         }
1771
1772         return &nescq->ibcq;
1773 }
1774
1775
1776 /**
1777  * nes_destroy_cq
1778  */
1779 static int nes_destroy_cq(struct ib_cq *ib_cq)
1780 {
1781         struct nes_cq *nescq;
1782         struct nes_device *nesdev;
1783         struct nes_vnic *nesvnic;
1784         struct nes_adapter *nesadapter;
1785         struct nes_hw_cqp_wqe *cqp_wqe;
1786         struct nes_cqp_request *cqp_request;
1787         unsigned long flags;
1788         u32 opcode = 0;
1789         int ret;
1790
1791         if (ib_cq == NULL)
1792                 return 0;
1793
1794         nescq = to_nescq(ib_cq);
1795         nesvnic = to_nesvnic(ib_cq->device);
1796         nesdev = nesvnic->nesdev;
1797         nesadapter = nesdev->nesadapter;
1798
1799         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1800
1801         /* Send DestroyCQ request to CQP */
1802         cqp_request = nes_get_cqp_request(nesdev);
1803         if (cqp_request == NULL) {
1804                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1805                 return -ENOMEM;
1806         }
1807         cqp_request->waiting = 1;
1808         cqp_wqe = &cqp_request->cqp_wqe;
1809         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1810         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1811         if (nescq->virtual_cq == 1) {
1812                 nesadapter->free_256pbl++;
1813                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1814                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1815                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1816                 }
1817         } else if (nescq->virtual_cq == 2) {
1818                 nesadapter->free_4kpbl++;
1819                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1820                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1821                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1822                 }
1823                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1824         }
1825
1826         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1827
1828         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1829         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1830         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1831                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1832         if (!nescq->mcrqf)
1833                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1834
1835         atomic_set(&cqp_request->refcount, 2);
1836         nes_post_cqp_request(nesdev, cqp_request);
1837
1838         /* Wait for CQP */
1839         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1840                         nescq->hw_cq.cq_number);
1841         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1842                         NES_EVENT_TIMEOUT);
1843         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1844                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1845                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1846                         cqp_request->minor_code);
1847         if (!ret) {
1848                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1849                                         nescq->hw_cq.cq_number);
1850                 ret = -ETIME;
1851         } else if (cqp_request->major_code) {
1852                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1853                                         nescq->hw_cq.cq_number);
1854                 ret = -EIO;
1855         } else {
1856                 ret = 0;
1857         }
1858         nes_put_cqp_request(nesdev, cqp_request);
1859
1860         if (nescq->cq_mem_size)
1861                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1862                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1863         kfree(nescq);
1864
1865         return ret;
1866 }
1867
1868 /**
1869  * root_256
1870  */
1871 static u32 root_256(struct nes_device *nesdev,
1872                     struct nes_root_vpbl *root_vpbl,
1873                     struct nes_root_vpbl *new_root,
1874                     u16 pbl_count_4k)
1875 {
1876         u64 leaf_pbl;
1877         int i, j, k;
1878
1879         if (pbl_count_4k == 1) {
1880                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1881                                                 512, &new_root->pbl_pbase);
1882
1883                 if (new_root->pbl_vbase == NULL)
1884                         return 0;
1885
1886                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1887                 for (i = 0; i < 16; i++) {
1888                         new_root->pbl_vbase[i].pa_low =
1889                                 cpu_to_le32((u32)leaf_pbl);
1890                         new_root->pbl_vbase[i].pa_high =
1891                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1892                         leaf_pbl += 256;
1893                 }
1894         } else {
1895                 for (i = 3; i >= 0; i--) {
1896                         j = i * 16;
1897                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1898                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1899                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1900                                 << 32);
1901                         for (k = 1; k < 16; k++) {
1902                                 leaf_pbl += 256;
1903                                 root_vpbl->pbl_vbase[j + k].pa_low =
1904                                                 cpu_to_le32((u32)leaf_pbl);
1905                                 root_vpbl->pbl_vbase[j + k].pa_high =
1906                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1907                         }
1908                 }
1909         }
1910
1911         return 1;
1912 }
1913
1914
1915 /**
1916  * nes_reg_mr
1917  */
1918 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1919                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1920                 dma_addr_t single_buffer, u16 pbl_count_4k,
1921                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1922                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1923 {
1924         struct nes_hw_cqp_wqe *cqp_wqe;
1925         struct nes_cqp_request *cqp_request;
1926         unsigned long flags;
1927         int ret;
1928         struct nes_adapter *nesadapter = nesdev->nesadapter;
1929         uint pg_cnt = 0;
1930         u16 pbl_count_256 = 0;
1931         u16 pbl_count = 0;
1932         u8  use_256_pbls = 0;
1933         u8  use_4k_pbls = 0;
1934         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1935         struct nes_root_vpbl new_root = { 0, NULL, NULL };
1936         u32 opcode = 0;
1937         u16 major_code;
1938
1939         /* Register the region with the adapter */
1940         cqp_request = nes_get_cqp_request(nesdev);
1941         if (cqp_request == NULL) {
1942                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1943                 return -ENOMEM;
1944         }
1945         cqp_request->waiting = 1;
1946         cqp_wqe = &cqp_request->cqp_wqe;
1947
1948         if (pbl_count_4k) {
1949                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1950
1951                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1952                 pbl_count_256 = (pg_cnt + 31) / 32;
1953                 if (pg_cnt <= 32) {
1954                         if (pbl_count_256 <= nesadapter->free_256pbl)
1955                                 use_256_pbls = 1;
1956                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1957                                 use_4k_pbls = 1;
1958                 } else if (pg_cnt <= 2048) {
1959                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1960                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1961                                 use_4k_pbls = 1;
1962                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1963                                 use_256_pbls = 1;
1964                                 use_two_level = 1;
1965                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1966                                 use_4k_pbls = 1;
1967                         }
1968                 } else {
1969                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1970                                 use_4k_pbls = 1;
1971                 }
1972
1973                 if (use_256_pbls) {
1974                         pbl_count = pbl_count_256;
1975                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1976                 } else if (use_4k_pbls) {
1977                         pbl_count =  pbl_count_4k;
1978                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1979                 } else {
1980                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1981                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1982                         nes_free_cqp_request(nesdev, cqp_request);
1983                         return -ENOMEM;
1984                 }
1985
1986                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1987         }
1988
1989         if (use_256_pbls && use_two_level) {
1990                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1991                         if (new_root.pbl_pbase != 0)
1992                                 root_vpbl = &new_root;
1993                 } else {
1994                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1995                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
1996                         use_256_pbls = 0;
1997
1998                         if (pbl_count_4k == 1)
1999                                 use_two_level = 0;
2000                         pbl_count = pbl_count_4k;
2001
2002                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
2003                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
2004                                 use_4k_pbls = 1;
2005                         }
2006                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2007
2008                         if (use_4k_pbls == 0)
2009                                 return -ENOMEM;
2010                 }
2011         }
2012
2013         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
2014                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
2015         if (acc & IB_ACCESS_LOCAL_WRITE)
2016                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
2017         if (acc & IB_ACCESS_REMOTE_WRITE)
2018                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
2019         if (acc & IB_ACCESS_REMOTE_READ)
2020                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
2021         if (acc & IB_ACCESS_MW_BIND)
2022                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
2023
2024         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2025         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
2026         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
2027         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
2028
2029         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
2030                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
2031         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
2032                         cpu_to_le32(nespd->pd_id & 0x00007fff);
2033         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
2034
2035         if (pbl_count == 0) {
2036                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
2037         } else {
2038                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
2039                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
2040                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
2041
2042                 if (use_4k_pbls)
2043                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
2044         }
2045         barrier();
2046
2047         atomic_set(&cqp_request->refcount, 2);
2048         nes_post_cqp_request(nesdev, cqp_request);
2049
2050         /* Wait for CQP */
2051         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
2052                         NES_EVENT_TIMEOUT);
2053         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
2054                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2055                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
2056         major_code = cqp_request->major_code;
2057         nes_put_cqp_request(nesdev, cqp_request);
2058
2059         if ((!ret || major_code) && pbl_count != 0) {
2060                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2061                 if (use_256_pbls)
2062                         nesadapter->free_256pbl += pbl_count + use_two_level;
2063                 else if (use_4k_pbls)
2064                         nesadapter->free_4kpbl += pbl_count + use_two_level;
2065                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2066         }
2067         if (new_root.pbl_pbase)
2068                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
2069                                     new_root.pbl_pbase);
2070
2071         if (!ret)
2072                 return -ETIME;
2073         else if (major_code)
2074                 return -EIO;
2075
2076         *actual_pbl_cnt = pbl_count + use_two_level;
2077         *used_4k_pbls = use_4k_pbls;
2078         return 0;
2079 }
2080
2081
2082 /**
2083  * nes_reg_phys_mr
2084  */
2085 static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
2086                 struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
2087                 u64 * iova_start)
2088 {
2089         u64 region_length;
2090         struct nes_pd *nespd = to_nespd(ib_pd);
2091         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2092         struct nes_device *nesdev = nesvnic->nesdev;
2093         struct nes_adapter *nesadapter = nesdev->nesadapter;
2094         struct nes_mr *nesmr;
2095         struct ib_mr *ibmr;
2096         struct nes_vpbl vpbl;
2097         struct nes_root_vpbl root_vpbl;
2098         u32 stag;
2099         u32 i;
2100         unsigned long mask;
2101         u32 stag_index = 0;
2102         u32 next_stag_index = 0;
2103         u32 driver_key = 0;
2104         u32 root_pbl_index = 0;
2105         u32 cur_pbl_index = 0;
2106         int err = 0;
2107         int ret = 0;
2108         u16 pbl_count = 0;
2109         u8 single_page = 1;
2110         u8 stag_key = 0;
2111
2112         region_length = 0;
2113         vpbl.pbl_vbase = NULL;
2114         root_vpbl.pbl_vbase = NULL;
2115         root_vpbl.pbl_pbase = 0;
2116
2117         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2118         stag_key = (u8)next_stag_index;
2119
2120         driver_key = 0;
2121
2122         next_stag_index >>= 8;
2123         next_stag_index %= nesadapter->max_mr;
2124         if (num_phys_buf > (1024*512)) {
2125                 return ERR_PTR(-E2BIG);
2126         }
2127
2128         if ((buffer_list[0].addr ^ *iova_start) & ~PAGE_MASK)
2129                 return ERR_PTR(-EINVAL);
2130
2131         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2132                         &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2133         if (err) {
2134                 return ERR_PTR(err);
2135         }
2136
2137         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2138         if (!nesmr) {
2139                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2140                 return ERR_PTR(-ENOMEM);
2141         }
2142
2143         for (i = 0; i < num_phys_buf; i++) {
2144
2145                 if ((i & 0x01FF) == 0) {
2146                         if (root_pbl_index == 1) {
2147                                 /* Allocate the root PBL */
2148                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
2149                                                 &root_vpbl.pbl_pbase);
2150                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2151                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2152                                 if (!root_vpbl.pbl_vbase) {
2153                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2154                                                         vpbl.pbl_pbase);
2155                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2156                                         kfree(nesmr);
2157                                         return ERR_PTR(-ENOMEM);
2158                                 }
2159                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
2160                                 if (!root_vpbl.leaf_vpbl) {
2161                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2162                                                         root_vpbl.pbl_pbase);
2163                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2164                                                         vpbl.pbl_pbase);
2165                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2166                                         kfree(nesmr);
2167                                         return ERR_PTR(-ENOMEM);
2168                                 }
2169                                 root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
2170                                 root_vpbl.pbl_vbase[0].pa_high =
2171                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2172                                 root_vpbl.leaf_vpbl[0] = vpbl;
2173                         }
2174                         /* Allocate a 4K buffer for the PBL */
2175                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2176                                         &vpbl.pbl_pbase);
2177                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2178                                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2179                         if (!vpbl.pbl_vbase) {
2180                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2181                                 ibmr = ERR_PTR(-ENOMEM);
2182                                 kfree(nesmr);
2183                                 goto reg_phys_err;
2184                         }
2185                         /* Fill in the root table */
2186                         if (1 <= root_pbl_index) {
2187                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2188                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2189                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2190                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2191                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2192                         }
2193                         root_pbl_index++;
2194                         cur_pbl_index = 0;
2195                 }
2196
2197                 mask = !buffer_list[i].size;
2198                 if (i != 0)
2199                         mask |= buffer_list[i].addr;
2200                 if (i != num_phys_buf - 1)
2201                         mask |= buffer_list[i].addr + buffer_list[i].size;
2202
2203                 if (mask & ~PAGE_MASK) {
2204                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2205                         nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2206                         ibmr = ERR_PTR(-EINVAL);
2207                         kfree(nesmr);
2208                         goto reg_phys_err;
2209                 }
2210
2211                 region_length += buffer_list[i].size;
2212                 if ((i != 0) && (single_page)) {
2213                         if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
2214                                 single_page = 0;
2215                 }
2216                 vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr & PAGE_MASK);
2217                 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
2218                                 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
2219         }
2220
2221         stag = stag_index << 8;
2222         stag |= driver_key;
2223         stag += (u32)stag_key;
2224
2225         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2226                         " length = 0x%016lX, index = 0x%08X\n",
2227                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2228
2229         /* Make the leaf PBL the root if only one PBL */
2230         if (root_pbl_index == 1) {
2231                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2232         }
2233
2234         if (single_page) {
2235                 pbl_count = 0;
2236         } else {
2237                 pbl_count = root_pbl_index;
2238         }
2239         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2240                         buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start,
2241                         &nesmr->pbls_used, &nesmr->pbl_4k);
2242
2243         if (ret == 0) {
2244                 nesmr->ibmr.rkey = stag;
2245                 nesmr->ibmr.lkey = stag;
2246                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2247                 ibmr = &nesmr->ibmr;
2248         } else {
2249                 kfree(nesmr);
2250                 ibmr = ERR_PTR(-ENOMEM);
2251         }
2252
2253         reg_phys_err:
2254         /* free the resources */
2255         if (root_pbl_index == 1) {
2256                 /* single PBL case */
2257                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2258         } else {
2259                 for (i=0; i<root_pbl_index; i++) {
2260                         pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
2261                                         root_vpbl.leaf_vpbl[i].pbl_pbase);
2262                 }
2263                 kfree(root_vpbl.leaf_vpbl);
2264                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2265                                 root_vpbl.pbl_pbase);
2266         }
2267
2268         return ibmr;
2269 }
2270
2271
2272 /**
2273  * nes_get_dma_mr
2274  */
2275 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2276 {
2277         struct ib_phys_buf bl;
2278         u64 kva = 0;
2279
2280         nes_debug(NES_DBG_MR, "\n");
2281
2282         bl.size = (u64)0xffffffffffULL;
2283         bl.addr = 0;
2284         return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
2285 }
2286
2287
2288 /**
2289  * nes_reg_user_mr
2290  */
2291 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2292                 u64 virt, int acc, struct ib_udata *udata)
2293 {
2294         u64 iova_start;
2295         __le64 *pbl;
2296         u64 region_length;
2297         dma_addr_t last_dma_addr = 0;
2298         dma_addr_t first_dma_addr = 0;
2299         struct nes_pd *nespd = to_nespd(pd);
2300         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2301         struct nes_device *nesdev = nesvnic->nesdev;
2302         struct nes_adapter *nesadapter = nesdev->nesadapter;
2303         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2304         struct ib_umem_chunk *chunk;
2305         struct nes_ucontext *nes_ucontext;
2306         struct nes_pbl *nespbl;
2307         struct nes_mr *nesmr;
2308         struct ib_umem *region;
2309         struct nes_mem_reg_req req;
2310         struct nes_vpbl vpbl;
2311         struct nes_root_vpbl root_vpbl;
2312         int nmap_index, page_index;
2313         int page_count = 0;
2314         int err, pbl_depth = 0;
2315         int chunk_pages;
2316         int ret;
2317         u32 stag;
2318         u32 stag_index = 0;
2319         u32 next_stag_index;
2320         u32 driver_key;
2321         u32 root_pbl_index = 0;
2322         u32 cur_pbl_index = 0;
2323         u32 skip_pages;
2324         u16 pbl_count;
2325         u8 single_page = 1;
2326         u8 stag_key;
2327
2328         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2329         if (IS_ERR(region)) {
2330                 return (struct ib_mr *)region;
2331         }
2332
2333         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2334                         " offset = %u, page size = %u.\n",
2335                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2336                         region->offset, region->page_size);
2337
2338         skip_pages = ((u32)region->offset) >> 12;
2339
2340         if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2341                 ib_umem_release(region);
2342                 return ERR_PTR(-EFAULT);
2343         }
2344         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2345
2346         switch (req.reg_type) {
2347                 case IWNES_MEMREG_TYPE_MEM:
2348                         pbl_depth = 0;
2349                         region_length = 0;
2350                         vpbl.pbl_vbase = NULL;
2351                         root_vpbl.pbl_vbase = NULL;
2352                         root_vpbl.pbl_pbase = 0;
2353
2354                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2355                         stag_key = (u8)next_stag_index;
2356
2357                         driver_key = next_stag_index & 0x70000000;
2358
2359                         next_stag_index >>= 8;
2360                         next_stag_index %= nesadapter->max_mr;
2361
2362                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2363                                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2364                         if (err) {
2365                                 ib_umem_release(region);
2366                                 return ERR_PTR(err);
2367                         }
2368
2369                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2370                         if (!nesmr) {
2371                                 ib_umem_release(region);
2372                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2373                                 return ERR_PTR(-ENOMEM);
2374                         }
2375                         nesmr->region = region;
2376
2377                         list_for_each_entry(chunk, &region->chunk_list, list) {
2378                                 nes_debug(NES_DBG_MR, "Chunk: nents = %u, nmap = %u .\n",
2379                                                 chunk->nents, chunk->nmap);
2380                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2381                                         if (sg_dma_address(&chunk->page_list[nmap_index]) & ~PAGE_MASK) {
2382                                                 ib_umem_release(region);
2383                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2384                                                 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2385                                                                 (unsigned int) sg_dma_address(&chunk->page_list[nmap_index]));
2386                                                 ibmr = ERR_PTR(-EINVAL);
2387                                                 kfree(nesmr);
2388                                                 goto reg_user_mr_err;
2389                                         }
2390
2391                                         if (!sg_dma_len(&chunk->page_list[nmap_index])) {
2392                                                 ib_umem_release(region);
2393                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2394                                                                 stag_index);
2395                                                 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2396                                                 ibmr = ERR_PTR(-EINVAL);
2397                                                 kfree(nesmr);
2398                                                 goto reg_user_mr_err;
2399                                         }
2400
2401                                         region_length += sg_dma_len(&chunk->page_list[nmap_index]);
2402                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2403                                         region_length -= skip_pages << 12;
2404                                         for (page_index=skip_pages; page_index < chunk_pages; page_index++) {
2405                                                 skip_pages = 0;
2406                                                 if ((page_count!=0)&&(page_count<<12)-(region->offset&(4096-1))>=region->length)
2407                                                         goto enough_pages;
2408                                                 if ((page_count&0x01FF) == 0) {
2409                                                         if (page_count >= 1024 * 512) {
2410                                                                 ib_umem_release(region);
2411                                                                 nes_free_resource(nesadapter,
2412                                                                                 nesadapter->allocated_mrs, stag_index);
2413                                                                 kfree(nesmr);
2414                                                                 ibmr = ERR_PTR(-E2BIG);
2415                                                                 goto reg_user_mr_err;
2416                                                         }
2417                                                         if (root_pbl_index == 1) {
2418                                                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2419                                                                                 8192, &root_vpbl.pbl_pbase);
2420                                                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2421                                                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2422                                                                 if (!root_vpbl.pbl_vbase) {
2423                                                                         ib_umem_release(region);
2424                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2425                                                                                         vpbl.pbl_pbase);
2426                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2427                                                                                         stag_index);
2428                                                                         kfree(nesmr);
2429                                                                         ibmr = ERR_PTR(-ENOMEM);
2430                                                                         goto reg_user_mr_err;
2431                                                                 }
2432                                                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2433                                                                                 GFP_KERNEL);
2434                                                                 if (!root_vpbl.leaf_vpbl) {
2435                                                                         ib_umem_release(region);
2436                                                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2437                                                                                         root_vpbl.pbl_pbase);
2438                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2439                                                                                         vpbl.pbl_pbase);
2440                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2441                                                                                         stag_index);
2442                                                                         kfree(nesmr);
2443                                                                         ibmr = ERR_PTR(-ENOMEM);
2444                                                                         goto reg_user_mr_err;
2445                                                                 }
2446                                                                 root_vpbl.pbl_vbase[0].pa_low =
2447                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2448                                                                 root_vpbl.pbl_vbase[0].pa_high =
2449                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2450                                                                 root_vpbl.leaf_vpbl[0] = vpbl;
2451                                                         }
2452                                                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2453                                                                         &vpbl.pbl_pbase);
2454                                                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2455                                                                         vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2456                                                         if (!vpbl.pbl_vbase) {
2457                                                                 ib_umem_release(region);
2458                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2459                                                                 ibmr = ERR_PTR(-ENOMEM);
2460                                                                 kfree(nesmr);
2461                                                                 goto reg_user_mr_err;
2462                                                         }
2463                                                         if (1 <= root_pbl_index) {
2464                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2465                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2466                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2467                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2468                                                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2469                                                         }
2470                                                         root_pbl_index++;
2471                                                         cur_pbl_index = 0;
2472                                                 }
2473                                                 if (single_page) {
2474                                                         if (page_count != 0) {
2475                                                                 if ((last_dma_addr+4096) !=
2476                                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2477                                                                                 (page_index*4096)))
2478                                                                         single_page = 0;
2479                                                                 last_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2480                                                                                 (page_index*4096);
2481                                                         } else {
2482                                                                 first_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2483                                                                                 (page_index*4096);
2484                                                                 last_dma_addr = first_dma_addr;
2485                                                         }
2486                                                 }
2487
2488                                                 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2489                                                                 cpu_to_le32((u32)(sg_dma_address(&chunk->page_list[nmap_index])+
2490                                                                 (page_index*4096)));
2491                                                 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2492                                                                 cpu_to_le32((u32)((((u64)(sg_dma_address(&chunk->page_list[nmap_index])+
2493                                                                 (page_index*4096))) >> 32)));
2494                                                 cur_pbl_index++;
2495                                                 page_count++;
2496                                         }
2497                                 }
2498                         }
2499                         enough_pages:
2500                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2501                                         " stag_key=0x%08x\n",
2502                                         stag_index, driver_key, stag_key);
2503                         stag = stag_index << 8;
2504                         stag |= driver_key;
2505                         stag += (u32)stag_key;
2506
2507                         iova_start = virt;
2508                         /* Make the leaf PBL the root if only one PBL */
2509                         if (root_pbl_index == 1) {
2510                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2511                         }
2512
2513                         if (single_page) {
2514                                 pbl_count = 0;
2515                         } else {
2516                                 pbl_count = root_pbl_index;
2517                                 first_dma_addr = 0;
2518                         }
2519                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2520                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2521                                         stag, (unsigned int)iova_start,
2522                                         (unsigned int)region_length, stag_index,
2523                                         (unsigned long long)region->length, pbl_count);
2524                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2525                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2526                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2527
2528                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2529
2530                         if (ret == 0) {
2531                                 nesmr->ibmr.rkey = stag;
2532                                 nesmr->ibmr.lkey = stag;
2533                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2534                                 ibmr = &nesmr->ibmr;
2535                         } else {
2536                                 ib_umem_release(region);
2537                                 kfree(nesmr);
2538                                 ibmr = ERR_PTR(-ENOMEM);
2539                         }
2540
2541                         reg_user_mr_err:
2542                         /* free the resources */
2543                         if (root_pbl_index == 1) {
2544                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2545                                                 vpbl.pbl_pbase);
2546                         } else {
2547                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2548                                         pci_free_consistent(nesdev->pcidev, 4096,
2549                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2550                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2551                                 }
2552                                 kfree(root_vpbl.leaf_vpbl);
2553                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2554                                                 root_vpbl.pbl_pbase);
2555                         }
2556
2557                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2558
2559                         return ibmr;
2560                 case IWNES_MEMREG_TYPE_QP:
2561                 case IWNES_MEMREG_TYPE_CQ:
2562                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2563                         if (!nespbl) {
2564                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2565                                 ib_umem_release(region);
2566                                 return ERR_PTR(-ENOMEM);
2567                         }
2568                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2569                         if (!nesmr) {
2570                                 ib_umem_release(region);
2571                                 kfree(nespbl);
2572                                 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2573                                 return ERR_PTR(-ENOMEM);
2574                         }
2575                         nesmr->region = region;
2576                         nes_ucontext = to_nesucontext(pd->uobject->context);
2577                         pbl_depth = region->length >> 12;
2578                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2579                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2580                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2581                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2582                         } else {
2583                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2584                         }
2585
2586                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2587                                         nespbl->pbl_size, pbl_depth);
2588                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2589                                         &nespbl->pbl_pbase);
2590                         if (!pbl) {
2591                                 ib_umem_release(region);
2592                                 kfree(nesmr);
2593                                 kfree(nespbl);
2594                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2595                                 return ERR_PTR(-ENOMEM);
2596                         }
2597
2598                         nespbl->pbl_vbase = (u64 *)pbl;
2599                         nespbl->user_base = start;
2600                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2601                                         " pbl_vbase=%p user_base=0x%lx\n",
2602                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2603                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2604
2605                         list_for_each_entry(chunk, &region->chunk_list, list) {
2606                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2607                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2608                                         chunk_pages += (sg_dma_len(&chunk->page_list[nmap_index]) & (4096-1)) ? 1 : 0;
2609                                         nespbl->page = sg_page(&chunk->page_list[0]);
2610                                         for (page_index=0; page_index<chunk_pages; page_index++) {
2611                                                 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2612                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2613                                                                 (page_index*4096)));
2614                                                 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2615                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2616                                                                 (page_index*4096)))>>32);
2617                                                 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2618                                                                 (unsigned long long)*pbl,
2619                                                                 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2620                                                 pbl++;
2621                                         }
2622                                 }
2623                         }
2624                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2625                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2626                         } else {
2627                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2628                         }
2629                         nesmr->ibmr.rkey = -1;
2630                         nesmr->ibmr.lkey = -1;
2631                         nesmr->mode = req.reg_type;
2632                         return &nesmr->ibmr;
2633         }
2634
2635         ib_umem_release(region);
2636         return ERR_PTR(-ENOSYS);
2637 }
2638
2639
2640 /**
2641  * nes_dereg_mr
2642  */
2643 static int nes_dereg_mr(struct ib_mr *ib_mr)
2644 {
2645         struct nes_mr *nesmr = to_nesmr(ib_mr);
2646         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2647         struct nes_device *nesdev = nesvnic->nesdev;
2648         struct nes_adapter *nesadapter = nesdev->nesadapter;
2649         struct nes_hw_cqp_wqe *cqp_wqe;
2650         struct nes_cqp_request *cqp_request;
2651         unsigned long flags;
2652         int ret;
2653         u16 major_code;
2654         u16 minor_code;
2655
2656         if (nesmr->region) {
2657                 ib_umem_release(nesmr->region);
2658         }
2659         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2660                 kfree(nesmr);
2661                 return 0;
2662         }
2663
2664         /* Deallocate the region with the adapter */
2665
2666         cqp_request = nes_get_cqp_request(nesdev);
2667         if (cqp_request == NULL) {
2668                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2669                 return -ENOMEM;
2670         }
2671         cqp_request->waiting = 1;
2672         cqp_wqe = &cqp_request->cqp_wqe;
2673
2674         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2675         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2676                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2677                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2678         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2679
2680         atomic_set(&cqp_request->refcount, 2);
2681         nes_post_cqp_request(nesdev, cqp_request);
2682
2683         /* Wait for CQP */
2684         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2685         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2686                         NES_EVENT_TIMEOUT);
2687         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2688                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2689                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2690
2691         major_code = cqp_request->major_code;
2692         minor_code = cqp_request->minor_code;
2693
2694         nes_put_cqp_request(nesdev, cqp_request);
2695
2696         if (!ret) {
2697                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2698                                 " ib_mr=%p, rkey = 0x%08X\n",
2699                                 ib_mr, ib_mr->rkey);
2700                 return -ETIME;
2701         } else if (major_code) {
2702                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2703                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2704                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2705                 return -EIO;
2706         }
2707
2708         if (nesmr->pbls_used != 0) {
2709                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2710                 if (nesmr->pbl_4k) {
2711                         nesadapter->free_4kpbl += nesmr->pbls_used;
2712                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2713                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2714                                         "exceeded the max(%u)\n",
2715                                         nesadapter->free_4kpbl,
2716                                         nesadapter->max_4kpbl);
2717                 } else {
2718                         nesadapter->free_256pbl += nesmr->pbls_used;
2719                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2720                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2721                                         "exceeded the max(%u)\n",
2722                                         nesadapter->free_256pbl,
2723                                         nesadapter->max_256pbl);
2724                 }
2725                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2726         }
2727         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2728                         (ib_mr->rkey & 0x0fffff00) >> 8);
2729
2730         kfree(nesmr);
2731
2732         return 0;
2733 }
2734
2735
2736 /**
2737  * show_rev
2738  */
2739 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2740                         char *buf)
2741 {
2742         struct nes_ib_device *nesibdev =
2743                         container_of(dev, struct nes_ib_device, ibdev.dev);
2744         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2745
2746         nes_debug(NES_DBG_INIT, "\n");
2747         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2748 }
2749
2750
2751 /**
2752  * show_fw_ver
2753  */
2754 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
2755                            char *buf)
2756 {
2757         struct nes_ib_device *nesibdev =
2758                         container_of(dev, struct nes_ib_device, ibdev.dev);
2759         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2760
2761         nes_debug(NES_DBG_INIT, "\n");
2762         return sprintf(buf, "%u.%u\n",
2763                 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
2764                 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
2765 }
2766
2767
2768 /**
2769  * show_hca
2770  */
2771 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2772                         char *buf)
2773 {
2774         nes_debug(NES_DBG_INIT, "\n");
2775         return sprintf(buf, "NES020\n");
2776 }
2777
2778
2779 /**
2780  * show_board
2781  */
2782 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2783                           char *buf)
2784 {
2785         nes_debug(NES_DBG_INIT, "\n");
2786         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2787 }
2788
2789
2790 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2791 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2792 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2793 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2794
2795 static struct device_attribute *nes_dev_attributes[] = {
2796         &dev_attr_hw_rev,
2797         &dev_attr_fw_ver,
2798         &dev_attr_hca_type,
2799         &dev_attr_board_id
2800 };
2801
2802
2803 /**
2804  * nes_query_qp
2805  */
2806 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2807                 int attr_mask, struct ib_qp_init_attr *init_attr)
2808 {
2809         struct nes_qp *nesqp = to_nesqp(ibqp);
2810
2811         nes_debug(NES_DBG_QP, "\n");
2812
2813         attr->qp_access_flags = 0;
2814         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2815         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2816         attr->cap.max_recv_sge = 1;
2817         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2818                 attr->cap.max_inline_data = 0;
2819         else
2820                 attr->cap.max_inline_data = 64;
2821
2822         init_attr->event_handler = nesqp->ibqp.event_handler;
2823         init_attr->qp_context = nesqp->ibqp.qp_context;
2824         init_attr->send_cq = nesqp->ibqp.send_cq;
2825         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2826         init_attr->srq = nesqp->ibqp.srq = nesqp->ibqp.srq;
2827         init_attr->cap = attr->cap;
2828
2829         return 0;
2830 }
2831
2832
2833 /**
2834  * nes_hw_modify_qp
2835  */
2836 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2837                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2838 {
2839         struct nes_hw_cqp_wqe *cqp_wqe;
2840         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2841         /* struct iw_cm_event cm_event; */
2842         struct nes_cqp_request *cqp_request;
2843         int ret;
2844         u16 major_code;
2845
2846         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2847                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2848
2849         cqp_request = nes_get_cqp_request(nesdev);
2850         if (cqp_request == NULL) {
2851                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2852                 return -ENOMEM;
2853         }
2854         if (wait_completion) {
2855                 cqp_request->waiting = 1;
2856         } else {
2857                 cqp_request->waiting = 0;
2858         }
2859         cqp_wqe = &cqp_request->cqp_wqe;
2860
2861         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2862                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2863         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2864                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2865         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2866         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2867         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2868
2869         /* If sending a terminate message, fill in the length (in words) */
2870         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2871             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2872                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2873                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2874         }
2875
2876         atomic_set(&cqp_request->refcount, 2);
2877         nes_post_cqp_request(nesdev, cqp_request);
2878
2879         /* Wait for CQP */
2880         if (wait_completion) {
2881                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2882                                 nesqp->hwqp.qp_id); */
2883                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2884                                 NES_EVENT_TIMEOUT);
2885                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2886                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2887                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2888                 major_code = cqp_request->major_code;
2889                 if (major_code) {
2890                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2891                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2892                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2893                                         cqp_request->minor_code, next_iwarp_state);
2894                 }
2895
2896                 nes_put_cqp_request(nesdev, cqp_request);
2897
2898                 if (!ret)
2899                         return -ETIME;
2900                 else if (major_code)
2901                         return -EIO;
2902                 else
2903                         return 0;
2904         } else {
2905                 return 0;
2906         }
2907 }
2908
2909
2910 /**
2911  * nes_modify_qp
2912  */
2913 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2914                 int attr_mask, struct ib_udata *udata)
2915 {
2916         struct nes_qp *nesqp = to_nesqp(ibqp);
2917         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2918         struct nes_device *nesdev = nesvnic->nesdev;
2919         /* u32 cqp_head; */
2920         /* u32 counter; */
2921         u32 next_iwarp_state = 0;
2922         int err;
2923         unsigned long qplockflags;
2924         int ret;
2925         u16 original_last_aeq;
2926         u8 issue_modify_qp = 0;
2927         u8 dont_wait = 0;
2928
2929         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2930                         " iwarp_state=0x%X, refcount=%d\n",
2931                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2932                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2933
2934         spin_lock_irqsave(&nesqp->lock, qplockflags);
2935
2936         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2937                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2938                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2939                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2940
2941         if (attr_mask & IB_QP_STATE) {
2942                 switch (attr->qp_state) {
2943                         case IB_QPS_INIT:
2944                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2945                                                 nesqp->hwqp.qp_id);
2946                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2947                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2948                                         return -EINVAL;
2949                                 }
2950                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2951                                 issue_modify_qp = 1;
2952                                 break;
2953                         case IB_QPS_RTR:
2954                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2955                                                 nesqp->hwqp.qp_id);
2956                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2957                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2958                                         return -EINVAL;
2959                                 }
2960                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2961                                 issue_modify_qp = 1;
2962                                 break;
2963                         case IB_QPS_RTS:
2964                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2965                                                 nesqp->hwqp.qp_id);
2966                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2967                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2968                                         return -EINVAL;
2969                                 }
2970                                 if (nesqp->cm_id == NULL) {
2971                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2972                                                         nesqp->hwqp.qp_id );
2973                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2974                                         return -EINVAL;
2975                                 }
2976                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2977                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2978                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2979                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2980                                 issue_modify_qp = 1;
2981                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2982                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2983                                 nesqp->hte_added = 1;
2984                                 break;
2985                         case IB_QPS_SQD:
2986                                 issue_modify_qp = 1;
2987                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2988                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2989                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2990                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2991                                         return 0;
2992                                 } else {
2993                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2994                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
2995                                                                 " ignored due to current iWARP state\n",
2996                                                                 nesqp->hwqp.qp_id);
2997                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2998                                                 return -EINVAL;
2999                                         }
3000                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
3001                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3002                                                                 " already done based on hw state.\n",
3003                                                                 nesqp->hwqp.qp_id);
3004                                                 issue_modify_qp = 0;
3005                                         }
3006                                         switch (nesqp->hw_iwarp_state) {
3007                                                 case NES_AEQE_IWARP_STATE_CLOSING:
3008                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3009                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
3010                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3011                                                         break;
3012                                                 case NES_AEQE_IWARP_STATE_ERROR:
3013                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3014                                                         break;
3015                                                 default:
3016                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3017                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
3018                                                         break;
3019                                         }
3020                                 }
3021                                 break;
3022                         case IB_QPS_SQE:
3023                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
3024                                                 nesqp->hwqp.qp_id);
3025                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
3026                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3027                                         return -EINVAL;
3028                                 }
3029                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3030                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3031                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
3032                                 issue_modify_qp = 1;
3033                                 break;
3034                         case IB_QPS_ERR:
3035                         case IB_QPS_RESET:
3036                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
3037                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3038                                         return -EINVAL;
3039                                 }
3040                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
3041                                                 nesqp->hwqp.qp_id);
3042                                 if (nesqp->term_flags)
3043                                         del_timer(&nesqp->terminate_timer);
3044
3045                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3046                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3047                                         if (nesqp->hte_added) {
3048                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
3049                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
3050                                                 nesqp->hte_added = 0;
3051                                         }
3052                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
3053                                                 (nesdev->iw_status) &&
3054                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
3055                                         next_iwarp_state |= NES_CQP_QP_RESET;
3056                                 } else {
3057                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
3058                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
3059                                         dont_wait = 1;
3060                                 }
3061                                 issue_modify_qp = 1;
3062                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
3063                                 break;
3064                         default:
3065                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3066                                 return -EINVAL;
3067                                 break;
3068                 }
3069
3070                 nesqp->ibqp_state = attr->qp_state;
3071                 if (((nesqp->iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) ==
3072                                 (u32)NES_CQP_QP_IWARP_STATE_RTS) &&
3073                                 ((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) >
3074                                 (u32)NES_CQP_QP_IWARP_STATE_RTS)) {
3075                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3076                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3077                                         nesqp->iwarp_state);
3078                 } else {
3079                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3080                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3081                                         nesqp->iwarp_state);
3082                 }
3083         }
3084
3085         if (attr_mask & IB_QP_ACCESS_FLAGS) {
3086                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
3087                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3088                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3089                         issue_modify_qp = 1;
3090                 }
3091                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
3092                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
3093                         issue_modify_qp = 1;
3094                 }
3095                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
3096                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
3097                         issue_modify_qp = 1;
3098                 }
3099                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
3100                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
3101                         issue_modify_qp = 1;
3102                 }
3103
3104                 if (nesqp->user_mode) {
3105                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3106                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3107                         issue_modify_qp = 1;
3108                 }
3109         }
3110
3111         original_last_aeq = nesqp->last_aeq;
3112         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3113
3114         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
3115
3116         ret = 0;
3117
3118
3119         if (issue_modify_qp) {
3120                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
3121                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
3122                 if (ret)
3123                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
3124                                         " failed for QP%u.\n",
3125                                         next_iwarp_state, nesqp->hwqp.qp_id);
3126
3127         }
3128
3129         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
3130                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
3131                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3132                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3133                                 original_last_aeq, nesqp->last_aeq);
3134                 if ((!ret) ||
3135                                 ((original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) &&
3136                                 (ret))) {
3137                         if (dont_wait) {
3138                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
3139                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
3140                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3141                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3142                                                         original_last_aeq, nesqp->last_aeq);
3143                                         /* this one is for the cm_disconnect thread */
3144                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
3145                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
3146                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
3147                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3148                                         nes_cm_disconn(nesqp);
3149                                 } else {
3150                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
3151                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3152                                 }
3153                         } else {
3154                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
3155                                 if (nesqp->cm_id) {
3156                                         /* These two are for the timer thread */
3157                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3158                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
3159                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3160                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
3161                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
3162                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3163                                                                 original_last_aeq, nesqp->last_aeq);
3164                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3165                                         }
3166                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3167                                 } else {
3168                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3169                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3170                                                         " need ae to finish up, original_last_aeq = 0x%04X."
3171                                                         " last_aeq = 0x%04X.\n",
3172                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3173                                                         original_last_aeq, nesqp->last_aeq);
3174                                 }
3175                         }
3176                 } else {
3177                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3178                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3179                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3180                                         original_last_aeq, nesqp->last_aeq);
3181                 }
3182         } else {
3183                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3184                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3185                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3186                                 original_last_aeq, nesqp->last_aeq);
3187         }
3188
3189         err = 0;
3190
3191         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3192                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3193
3194         return err;
3195 }
3196
3197
3198 /**
3199  * nes_muticast_attach
3200  */
3201 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3202 {
3203         nes_debug(NES_DBG_INIT, "\n");
3204         return -ENOSYS;
3205 }
3206
3207
3208 /**
3209  * nes_multicast_detach
3210  */
3211 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3212 {
3213         nes_debug(NES_DBG_INIT, "\n");
3214         return -ENOSYS;
3215 }
3216
3217
3218 /**
3219  * nes_process_mad
3220  */
3221 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3222                 u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
3223                 struct ib_mad *in_mad, struct ib_mad *out_mad)
3224 {
3225         nes_debug(NES_DBG_INIT, "\n");
3226         return -ENOSYS;
3227 }
3228
3229 static inline void
3230 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3231 {
3232         int sge_index;
3233         int total_payload_length = 0;
3234         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3235                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3236                         ib_wr->sg_list[sge_index].addr);
3237                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3238                         ib_wr->sg_list[sge_index].length);
3239                 if (uselkey)
3240                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3241                                                 (ib_wr->sg_list[sge_index].lkey));
3242                 else
3243                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3244
3245                 total_payload_length += ib_wr->sg_list[sge_index].length;
3246         }
3247         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3248                         total_payload_length);
3249         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3250                                 total_payload_length);
3251 }
3252
3253 /**
3254  * nes_post_send
3255  */
3256 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3257                 struct ib_send_wr **bad_wr)
3258 {
3259         u64 u64temp;
3260         unsigned long flags = 0;
3261         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3262         struct nes_device *nesdev = nesvnic->nesdev;
3263         struct nes_qp *nesqp = to_nesqp(ibqp);
3264         struct nes_hw_qp_wqe *wqe;
3265         int err = 0;
3266         u32 qsize = nesqp->hwqp.sq_size;
3267         u32 head;
3268         u32 wqe_misc = 0;
3269         u32 wqe_count = 0;
3270         u32 counter;
3271
3272         if (nesqp->ibqp_state > IB_QPS_RTS) {
3273                 err = -EINVAL;
3274                 goto out;
3275         }
3276
3277         spin_lock_irqsave(&nesqp->lock, flags);
3278
3279         head = nesqp->hwqp.sq_head;
3280
3281         while (ib_wr) {
3282                 /* Check for QP error */
3283                 if (nesqp->term_flags) {
3284                         err = -EINVAL;
3285                         break;
3286                 }
3287
3288                 /* Check for SQ overflow */
3289                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3290                         err = -ENOMEM;
3291                         break;
3292                 }
3293
3294                 wqe = &nesqp->hwqp.sq_vbase[head];
3295                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3296                                 nesqp->hwqp.qp_id, wqe, head); */
3297                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3298                 u64temp = (u64)(ib_wr->wr_id);
3299                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3300                                         u64temp);
3301                 switch (ib_wr->opcode) {
3302                 case IB_WR_SEND:
3303                 case IB_WR_SEND_WITH_INV:
3304                         if (IB_WR_SEND == ib_wr->opcode) {
3305                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3306                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3307                                 else
3308                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3309                         } else {
3310                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3311                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3312                                 else
3313                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3314
3315                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3316                                                     ib_wr->ex.invalidate_rkey);
3317                         }
3318
3319                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3320                                 err = -EINVAL;
3321                                 break;
3322                         }
3323
3324                         if (ib_wr->send_flags & IB_SEND_FENCE)
3325                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3326
3327                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3328                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3329                              (ib_wr->sg_list[0].length <= 64)) {
3330                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3331                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3332                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3333                                                     ib_wr->sg_list[0].length);
3334                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3335                         } else {
3336                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3337                         }
3338
3339                         break;
3340                 case IB_WR_RDMA_WRITE:
3341                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3342                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3343                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3344                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3345                                 err = -EINVAL;
3346                                 break;
3347                         }
3348
3349                         if (ib_wr->send_flags & IB_SEND_FENCE)
3350                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3351
3352                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3353                                             ib_wr->wr.rdma.rkey);
3354                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3355                                             ib_wr->wr.rdma.remote_addr);
3356
3357                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3358                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3359                              (ib_wr->sg_list[0].length <= 64)) {
3360                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3361                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3362                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3363                                                     ib_wr->sg_list[0].length);
3364                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3365                         } else {
3366                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3367                         }
3368
3369                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3370                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3371                         break;
3372                 case IB_WR_RDMA_READ:
3373                 case IB_WR_RDMA_READ_WITH_INV:
3374                         /* iWARP only supports 1 sge for RDMA reads */
3375                         if (ib_wr->num_sge > 1) {
3376                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3377                                           ib_wr->num_sge);
3378                                 err = -EINVAL;
3379                                 break;
3380                         }
3381                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3382                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3383                         } else {
3384                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3385                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3386                                                     ib_wr->ex.invalidate_rkey);
3387                         }
3388
3389                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3390                                             ib_wr->wr.rdma.remote_addr);
3391                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3392                                             ib_wr->wr.rdma.rkey);
3393                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3394                                             ib_wr->sg_list->length);
3395                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3396                                             ib_wr->sg_list->addr);
3397                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3398                                             ib_wr->sg_list->lkey);
3399                         break;
3400                 case IB_WR_LOCAL_INV:
3401                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3402                         set_wqe_32bit_value(wqe->wqe_words,
3403                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3404                                             ib_wr->ex.invalidate_rkey);
3405                         break;
3406                 case IB_WR_FAST_REG_MR:
3407                 {
3408                         int i;
3409                         int flags = ib_wr->wr.fast_reg.access_flags;
3410                         struct nes_ib_fast_reg_page_list *pnesfrpl =
3411                                 container_of(ib_wr->wr.fast_reg.page_list,
3412                                              struct nes_ib_fast_reg_page_list,
3413                                              ibfrpl);
3414                         u64 *src_page_list = pnesfrpl->ibfrpl.page_list;
3415                         u64 *dst_page_list = pnesfrpl->nes_wqe_pbl.kva;
3416
3417                         if (ib_wr->wr.fast_reg.page_list_len >
3418                             (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3419                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3420                                 err = -EINVAL;
3421                                 break;
3422                         }
3423                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3424                         set_wqe_64bit_value(wqe->wqe_words,
3425                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3426                                             ib_wr->wr.fast_reg.iova_start);
3427                         set_wqe_32bit_value(wqe->wqe_words,
3428                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3429                                             ib_wr->wr.fast_reg.length);
3430                         set_wqe_32bit_value(wqe->wqe_words,
3431                                             NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3432                         set_wqe_32bit_value(wqe->wqe_words,
3433                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3434                                             ib_wr->wr.fast_reg.rkey);
3435                         /* Set page size: */
3436                         if (ib_wr->wr.fast_reg.page_shift == 12) {
3437                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3438                         } else if (ib_wr->wr.fast_reg.page_shift == 21) {
3439                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3440                         } else {
3441                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3442                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3443                                 err = -EINVAL;
3444                                 break;
3445                         }
3446                         /* Set access_flags */
3447                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3448                         if (flags & IB_ACCESS_LOCAL_WRITE)
3449                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3450
3451                         if (flags & IB_ACCESS_REMOTE_WRITE)
3452                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3453
3454                         if (flags & IB_ACCESS_REMOTE_READ)
3455                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3456
3457                         if (flags & IB_ACCESS_MW_BIND)
3458                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3459
3460                         /* Fill in PBL info: */
3461                         if (ib_wr->wr.fast_reg.page_list_len >
3462                             pnesfrpl->ibfrpl.max_page_list_len) {
3463                                 nes_debug(NES_DBG_IW_TX, "Invalid page list length,"
3464                                           " ib_wr=%p, value=%u, max=%u\n",
3465                                           ib_wr, ib_wr->wr.fast_reg.page_list_len,
3466                                           pnesfrpl->ibfrpl.max_page_list_len);
3467                                 err = -EINVAL;
3468                                 break;
3469                         }
3470
3471                         set_wqe_64bit_value(wqe->wqe_words,
3472                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3473                                             pnesfrpl->nes_wqe_pbl.paddr);
3474
3475                         set_wqe_32bit_value(wqe->wqe_words,
3476                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3477                                             ib_wr->wr.fast_reg.page_list_len * 8);
3478
3479                         for (i = 0; i < ib_wr->wr.fast_reg.page_list_len; i++)
3480                                 dst_page_list[i] = cpu_to_le64(src_page_list[i]);
3481
3482                         nes_debug(NES_DBG_IW_TX, "SQ_FMR: iova_start: %llx, "
3483                                   "length: %d, rkey: %0x, pgl_paddr: %llx, "
3484                                   "page_list_len: %u, wqe_misc: %x\n",
3485                                   (unsigned long long) ib_wr->wr.fast_reg.iova_start,
3486                                   ib_wr->wr.fast_reg.length,
3487                                   ib_wr->wr.fast_reg.rkey,
3488                                   (unsigned long long) pnesfrpl->nes_wqe_pbl.paddr,
3489                                   ib_wr->wr.fast_reg.page_list_len,
3490                                   wqe_misc);
3491                         break;
3492                 }
3493                 default:
3494                         /* error */
3495                         err = -EINVAL;
3496                         break;
3497                 }
3498
3499                 if (err)
3500                         break;
3501
3502                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3503                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3504
3505                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3506
3507                 ib_wr = ib_wr->next;
3508                 head++;
3509                 wqe_count++;
3510                 if (head >= qsize)
3511                         head = 0;
3512
3513         }
3514
3515         nesqp->hwqp.sq_head = head;
3516         barrier();
3517         while (wqe_count) {
3518                 counter = min(wqe_count, ((u32)255));
3519                 wqe_count -= counter;
3520                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3521                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3522         }
3523
3524         spin_unlock_irqrestore(&nesqp->lock, flags);
3525
3526 out:
3527         if (err)
3528                 *bad_wr = ib_wr;
3529         return err;
3530 }
3531
3532
3533 /**
3534  * nes_post_recv
3535  */
3536 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3537                 struct ib_recv_wr **bad_wr)
3538 {
3539         u64 u64temp;
3540         unsigned long flags = 0;
3541         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3542         struct nes_device *nesdev = nesvnic->nesdev;
3543         struct nes_qp *nesqp = to_nesqp(ibqp);
3544         struct nes_hw_qp_wqe *wqe;
3545         int err = 0;
3546         int sge_index;
3547         u32 qsize = nesqp->hwqp.rq_size;
3548         u32 head;
3549         u32 wqe_count = 0;
3550         u32 counter;
3551         u32 total_payload_length;
3552
3553         if (nesqp->ibqp_state > IB_QPS_RTS) {
3554                 err = -EINVAL;
3555                 goto out;
3556         }
3557
3558         spin_lock_irqsave(&nesqp->lock, flags);
3559
3560         head = nesqp->hwqp.rq_head;
3561
3562         while (ib_wr) {
3563                 /* Check for QP error */
3564                 if (nesqp->term_flags) {
3565                         err = -EINVAL;
3566                         break;
3567                 }
3568
3569                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3570                         err = -EINVAL;
3571                         break;
3572                 }
3573                 /* Check for RQ overflow */
3574                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3575                         err = -ENOMEM;
3576                         break;
3577                 }
3578
3579                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3580                 wqe = &nesqp->hwqp.rq_vbase[head];
3581
3582                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3583                                 nesqp->hwqp.qp_id, wqe, head); */
3584                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3585                 u64temp = (u64)(ib_wr->wr_id);
3586                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3587                                         u64temp);
3588                 total_payload_length = 0;
3589                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3590                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3591                                         ib_wr->sg_list[sge_index].addr);
3592                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3593                                         ib_wr->sg_list[sge_index].length);
3594                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3595                                         ib_wr->sg_list[sge_index].lkey);
3596
3597                         total_payload_length += ib_wr->sg_list[sge_index].length;
3598                 }
3599                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3600                                         total_payload_length);
3601
3602                 ib_wr = ib_wr->next;
3603                 head++;
3604                 wqe_count++;
3605                 if (head >= qsize)
3606                         head = 0;
3607         }
3608
3609         nesqp->hwqp.rq_head = head;
3610         barrier();
3611         while (wqe_count) {
3612                 counter = min(wqe_count, ((u32)255));
3613                 wqe_count -= counter;
3614                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3615         }
3616
3617         spin_unlock_irqrestore(&nesqp->lock, flags);
3618
3619 out:
3620         if (err)
3621                 *bad_wr = ib_wr;
3622         return err;
3623 }
3624
3625
3626 /**
3627  * nes_poll_cq
3628  */
3629 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3630 {
3631         u64 u64temp;
3632         u64 wrid;
3633         unsigned long flags = 0;
3634         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3635         struct nes_device *nesdev = nesvnic->nesdev;
3636         struct nes_cq *nescq = to_nescq(ibcq);
3637         struct nes_qp *nesqp;
3638         struct nes_hw_cqe cqe;
3639         u32 head;
3640         u32 wq_tail = 0;
3641         u32 cq_size;
3642         u32 cqe_count = 0;
3643         u32 wqe_index;
3644         u32 u32temp;
3645         u32 move_cq_head = 1;
3646         u32 err_code;
3647
3648         nes_debug(NES_DBG_CQ, "\n");
3649
3650         spin_lock_irqsave(&nescq->lock, flags);
3651
3652         head = nescq->hw_cq.cq_head;
3653         cq_size = nescq->hw_cq.cq_size;
3654
3655         while (cqe_count < num_entries) {
3656                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3657                                 NES_CQE_VALID) == 0)
3658                         break;
3659
3660                 /*
3661                  * Make sure we read CQ entry contents *after*
3662                  * we've checked the valid bit.
3663                  */
3664                 rmb();
3665
3666                 cqe = nescq->hw_cq.cq_vbase[head];
3667                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3668                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3669                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3670                 /* parse CQE, get completion context from WQE (either rq or sq) */
3671                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3672                                 ((u64)u32temp);
3673
3674                 if (u64temp) {
3675                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3676                         memset(entry, 0, sizeof *entry);
3677                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3678                                 entry->status = IB_WC_SUCCESS;
3679                         } else {
3680                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3681                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3682                                         entry->status = err_code & 0x0000ffff;
3683
3684                                         /* The rest of the cqe's will be marked as flushed */
3685                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3686                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3687                                                             NES_IWARP_CQE_MINOR_FLUSH);
3688                                 } else
3689                                         entry->status = IB_WC_WR_FLUSH_ERR;
3690                         }
3691
3692                         entry->qp = &nesqp->ibqp;
3693                         entry->src_qp = nesqp->hwqp.qp_id;
3694
3695                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3696                                 if (nesqp->skip_lsmm) {
3697                                         nesqp->skip_lsmm = 0;
3698                                         nesqp->hwqp.sq_tail++;
3699                                 }
3700
3701                                 /* Working on a SQ Completion*/
3702                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3703                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3704                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3705                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3706                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3707                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3708
3709                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3710                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3711                                         case NES_IWARP_SQ_OP_RDMAW:
3712                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3713                                                 entry->opcode = IB_WC_RDMA_WRITE;
3714                                                 break;
3715                                         case NES_IWARP_SQ_OP_RDMAR:
3716                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3717                                                 entry->opcode = IB_WC_RDMA_READ;
3718                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3719                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3720                                                 break;
3721                                         case NES_IWARP_SQ_OP_SENDINV:
3722                                         case NES_IWARP_SQ_OP_SENDSEINV:
3723                                         case NES_IWARP_SQ_OP_SEND:
3724                                         case NES_IWARP_SQ_OP_SENDSE:
3725                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3726                                                 entry->opcode = IB_WC_SEND;
3727                                                 break;
3728                                         case NES_IWARP_SQ_OP_LOCINV:
3729                                                 entry->opcode = IB_WC_LOCAL_INV;
3730                                                 break;
3731                                         case NES_IWARP_SQ_OP_FAST_REG:
3732                                                 entry->opcode = IB_WC_FAST_REG_MR;
3733                                                 break;
3734                                 }
3735
3736                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3737                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3738                                         move_cq_head = 0;
3739                                         wq_tail = nesqp->hwqp.sq_tail;
3740                                 }
3741                         } else {
3742                                 /* Working on a RQ Completion*/
3743                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3744                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3745                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3746                                         entry->opcode = IB_WC_RECV;
3747
3748                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3749                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3750                                         move_cq_head = 0;
3751                                         wq_tail = nesqp->hwqp.rq_tail;
3752                                 }
3753                         }
3754
3755                         entry->wr_id = wrid;
3756                         entry++;
3757                         cqe_count++;
3758                 }
3759
3760                 if (move_cq_head) {
3761                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3762                         if (++head >= cq_size)
3763                                 head = 0;
3764                         nescq->polled_completions++;
3765
3766                         if ((nescq->polled_completions > (cq_size / 2)) ||
3767                                         (nescq->polled_completions == 255)) {
3768                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3769                                         " are pending %u of %u.\n",
3770                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3771                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3772                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3773                                 nescq->polled_completions = 0;
3774                         }
3775                 } else {
3776                         /* Update the wqe index and set status to flush */
3777                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3778                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3779                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3780                                 cpu_to_le32(wqe_index);
3781                         move_cq_head = 1; /* ready for next pass */
3782                 }
3783         }
3784
3785         if (nescq->polled_completions) {
3786                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3787                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3788                 nescq->polled_completions = 0;
3789         }
3790
3791         nescq->hw_cq.cq_head = head;
3792         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3793                         cqe_count, nescq->hw_cq.cq_number);
3794
3795         spin_unlock_irqrestore(&nescq->lock, flags);
3796
3797         return cqe_count;
3798 }
3799
3800
3801 /**
3802  * nes_req_notify_cq
3803  */
3804 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3805                 {
3806         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3807         struct nes_device *nesdev = nesvnic->nesdev;
3808         struct nes_cq *nescq = to_nescq(ibcq);
3809         u32 cq_arm;
3810
3811         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3812                         nescq->hw_cq.cq_number);
3813
3814         cq_arm = nescq->hw_cq.cq_number;
3815         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3816                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3817         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3818                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3819         else
3820                 return -EINVAL;
3821
3822         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3823         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3824
3825         return 0;
3826 }
3827
3828
3829 /**
3830  * nes_init_ofa_device
3831  */
3832 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3833 {
3834         struct nes_ib_device *nesibdev;
3835         struct nes_vnic *nesvnic = netdev_priv(netdev);
3836         struct nes_device *nesdev = nesvnic->nesdev;
3837
3838         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3839         if (nesibdev == NULL) {
3840                 return NULL;
3841         }
3842         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3843         nesibdev->ibdev.owner = THIS_MODULE;
3844
3845         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3846         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3847         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3848
3849         nesibdev->ibdev.uverbs_cmd_mask =
3850                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3851                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3852                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3853                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3854                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3855                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3856                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3857                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3858                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3859                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3860                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3861                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3862                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3863                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3864                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3865                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3866                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3867                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3868                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3869                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3870                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3871                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3872
3873         nesibdev->ibdev.phys_port_cnt = 1;
3874         nesibdev->ibdev.num_comp_vectors = 1;
3875         nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3876         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3877         nesibdev->ibdev.query_device = nes_query_device;
3878         nesibdev->ibdev.query_port = nes_query_port;
3879         nesibdev->ibdev.query_pkey = nes_query_pkey;
3880         nesibdev->ibdev.query_gid = nes_query_gid;
3881         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3882         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3883         nesibdev->ibdev.mmap = nes_mmap;
3884         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3885         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3886         nesibdev->ibdev.create_ah = nes_create_ah;
3887         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3888         nesibdev->ibdev.create_qp = nes_create_qp;
3889         nesibdev->ibdev.modify_qp = nes_modify_qp;
3890         nesibdev->ibdev.query_qp = nes_query_qp;
3891         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3892         nesibdev->ibdev.create_cq = nes_create_cq;
3893         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3894         nesibdev->ibdev.poll_cq = nes_poll_cq;
3895         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3896         nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
3897         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3898         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3899         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3900         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3901         nesibdev->ibdev.bind_mw = nes_bind_mw;
3902
3903         nesibdev->ibdev.alloc_fast_reg_mr = nes_alloc_fast_reg_mr;
3904         nesibdev->ibdev.alloc_fast_reg_page_list = nes_alloc_fast_reg_page_list;
3905         nesibdev->ibdev.free_fast_reg_page_list = nes_free_fast_reg_page_list;
3906
3907         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3908         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3909         nesibdev->ibdev.process_mad = nes_process_mad;
3910
3911         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3912         nesibdev->ibdev.post_send = nes_post_send;
3913         nesibdev->ibdev.post_recv = nes_post_recv;
3914
3915         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3916         if (nesibdev->ibdev.iwcm == NULL) {
3917                 ib_dealloc_device(&nesibdev->ibdev);
3918                 return NULL;
3919         }
3920         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3921         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3922         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3923         nesibdev->ibdev.iwcm->connect = nes_connect;
3924         nesibdev->ibdev.iwcm->accept = nes_accept;
3925         nesibdev->ibdev.iwcm->reject = nes_reject;
3926         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3927         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3928
3929         return nesibdev;
3930 }
3931
3932
3933 /**
3934  * nes_handle_delayed_event
3935  */
3936 static void nes_handle_delayed_event(unsigned long data)
3937 {
3938         struct nes_vnic *nesvnic = (void *) data;
3939
3940         if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3941                 struct ib_event event;
3942
3943                 event.device = &nesvnic->nesibdev->ibdev;
3944                 if (!event.device)
3945                         goto stop_timer;
3946                 event.event = nesvnic->delayed_event;
3947                 event.element.port_num = nesvnic->logical_port + 1;
3948                 ib_dispatch_event(&event);
3949         }
3950
3951 stop_timer:
3952         nesvnic->event_timer.function = NULL;
3953 }
3954
3955
3956 void  nes_port_ibevent(struct nes_vnic *nesvnic)
3957 {
3958         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3959         struct nes_device *nesdev = nesvnic->nesdev;
3960         struct ib_event event;
3961         event.device = &nesibdev->ibdev;
3962         event.element.port_num = nesvnic->logical_port + 1;
3963         event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3964
3965         if (!nesvnic->event_timer.function) {
3966                 ib_dispatch_event(&event);
3967                 nesvnic->last_dispatched_event = event.event;
3968                 nesvnic->event_timer.function = nes_handle_delayed_event;
3969                 nesvnic->event_timer.data = (unsigned long) nesvnic;
3970                 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3971                 add_timer(&nesvnic->event_timer);
3972         } else {
3973                 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3974         }
3975         nesvnic->delayed_event = event.event;
3976 }
3977
3978
3979 /**
3980  * nes_destroy_ofa_device
3981  */
3982 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3983 {
3984         if (nesibdev == NULL)
3985                 return;
3986
3987         nes_unregister_ofa_device(nesibdev);
3988
3989         kfree(nesibdev->ibdev.iwcm);
3990         ib_dealloc_device(&nesibdev->ibdev);
3991 }
3992
3993
3994 /**
3995  * nes_register_ofa_device
3996  */
3997 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3998 {
3999         struct nes_vnic *nesvnic = nesibdev->nesvnic;
4000         struct nes_device *nesdev = nesvnic->nesdev;
4001         struct nes_adapter *nesadapter = nesdev->nesadapter;
4002         int i, ret;
4003
4004         ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
4005         if (ret) {
4006                 return ret;
4007         }
4008
4009         /* Get the resources allocated to this device */
4010         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
4011         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
4012         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
4013         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
4014
4015         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4016                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4017                 if (ret) {
4018                         while (i > 0) {
4019                                 i--;
4020                                 device_remove_file(&nesibdev->ibdev.dev,
4021                                                    nes_dev_attributes[i]);
4022                         }
4023                         ib_unregister_device(&nesibdev->ibdev);
4024                         return ret;
4025                 }
4026         }
4027
4028         nesvnic->of_device_registered = 1;
4029
4030         return 0;
4031 }
4032
4033
4034 /**
4035  * nes_unregister_ofa_device
4036  */
4037 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
4038 {
4039         struct nes_vnic *nesvnic = nesibdev->nesvnic;
4040         int i;
4041
4042         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4043                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4044         }
4045
4046         if (nesvnic->of_device_registered) {
4047                 ib_unregister_device(&nesibdev->ibdev);
4048         }
4049
4050         nesvnic->of_device_registered = 0;
4051 }