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, enum ib_mw_type type)
  59 {
  60         struct nes_pd *nespd = to_nespd(ibpd);
  61         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
  62         struct nes_device *nesdev = nesvnic->nesdev;
  63         struct nes_adapter *nesadapter = nesdev->nesadapter;
  64         struct nes_cqp_request *cqp_request;
  65         struct nes_mr *nesmr;
  66         struct ib_mw *ibmw;
  67         struct nes_hw_cqp_wqe *cqp_wqe;
  68         int ret;
  69         u32 stag;
  70         u32 stag_index = 0;
  71         u32 next_stag_index = 0;
  72         u32 driver_key = 0;
  73         u8 stag_key = 0;
  74
  75         if (type != IB_MW_TYPE_1)
  76                 return ERR_PTR(-EINVAL);
  77
  78         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
  79         stag_key = (u8)next_stag_index;
  80
  81         driver_key = 0;
  82
  83         next_stag_index >>= 8;
  84         next_stag_index %= nesadapter->max_mr;
  85
  86         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
  87                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_MW);
  88         if (ret) {
  89                 return ERR_PTR(ret);
  90         }
  91
  92         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
  93         if (!nesmr) {
  94                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
  95                 return ERR_PTR(-ENOMEM);
  96         }
  97
  98         stag = stag_index << 8;
  99         stag |= driver_key;
 100         stag += (u32)stag_key;
 101
 102         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
 103                         stag, stag_index);
 104
 105         /* Register the region with the adapter */
 106         cqp_request = nes_get_cqp_request(nesdev);
 107         if (cqp_request == NULL) {
 108                 kfree(nesmr);
 109                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 110                 return ERR_PTR(-ENOMEM);
 111         }
 112
 113         cqp_request->waiting = 1;
 114         cqp_wqe = &cqp_request->cqp_wqe;
 115
 116         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
 117                         cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
 118                         NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
 119                         NES_CQP_STAG_REM_ACC_EN);
 120
 121         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 122         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
 123         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 124
 125         atomic_set(&cqp_request->refcount, 2);
 126         nes_post_cqp_request(nesdev, cqp_request);
 127
 128         /* Wait for CQP */
 129         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
 130                         NES_EVENT_TIMEOUT);
 131         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
 132                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 133                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
 134         if ((!ret) || (cqp_request->major_code)) {
 135                 nes_put_cqp_request(nesdev, cqp_request);
 136                 kfree(nesmr);
 137                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 138                 if (!ret) {
 139                         return ERR_PTR(-ETIME);
 140                 } else {
 141                         return ERR_PTR(-ENOMEM);
 142                 }
 143         }
 144         nes_put_cqp_request(nesdev, cqp_request);
 145
 146         nesmr->ibmw.rkey = stag;
 147         nesmr->mode = IWNES_MEMREG_TYPE_MW;
 148         ibmw = &nesmr->ibmw;
 149         nesmr->pbl_4k = 0;
 150         nesmr->pbls_used = 0;
 151
 152         return ibmw;
 153 }
 154
 155
 156 /**
 157  * nes_dealloc_mw
 158  */
 159 static int nes_dealloc_mw(struct ib_mw *ibmw)
 160 {
 161         struct nes_mr *nesmr = to_nesmw(ibmw);
 162         struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
 163         struct nes_device *nesdev = nesvnic->nesdev;
 164         struct nes_adapter *nesadapter = nesdev->nesadapter;
 165         struct nes_hw_cqp_wqe *cqp_wqe;
 166         struct nes_cqp_request *cqp_request;
 167         int err = 0;
 168         int ret;
 169
 170         /* Deallocate the window with the adapter */
 171         cqp_request = nes_get_cqp_request(nesdev);
 172         if (cqp_request == NULL) {
 173                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 174                 return -ENOMEM;
 175         }
 176         cqp_request->waiting = 1;
 177         cqp_wqe = &cqp_request->cqp_wqe;
 178         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 179         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
 180         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
 181
 182         atomic_set(&cqp_request->refcount, 2);
 183         nes_post_cqp_request(nesdev, cqp_request);
 184
 185         /* Wait for CQP */
 186         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
 187                         ibmw->rkey);
 188         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
 189                         NES_EVENT_TIMEOUT);
 190         nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
 191                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 192                         ret, cqp_request->major_code, cqp_request->minor_code);
 193         if (!ret)
 194                 err = -ETIME;
 195         else if (cqp_request->major_code)
 196                 err = -EIO;
 197
 198         nes_put_cqp_request(nesdev, cqp_request);
 199
 200         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
 201                         (ibmw->rkey & 0x0fffff00) >> 8);
 202         kfree(nesmr);
 203
 204         return err;
 205 }
 206
 207
 208 /**
 209  * nes_bind_mw
 210  */
 211 static int nes_bind_mw(struct ib_qp *ibqp, struct ib_mw *ibmw,
 212                 struct ib_mw_bind *ibmw_bind)
 213 {
 214         u64 u64temp;
 215         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
 216         struct nes_device *nesdev = nesvnic->nesdev;
 217         /* struct nes_mr *nesmr = to_nesmw(ibmw); */
 218         struct nes_qp *nesqp = to_nesqp(ibqp);
 219         struct nes_hw_qp_wqe *wqe;
 220         unsigned long flags = 0;
 221         u32 head;
 222         u32 wqe_misc = 0;
 223         u32 qsize;
 224
 225         if (nesqp->ibqp_state > IB_QPS_RTS)
 226                 return -EINVAL;
 227
 228         spin_lock_irqsave(&nesqp->lock, flags);
 229
 230         head = nesqp->hwqp.sq_head;
 231         qsize = nesqp->hwqp.sq_tail;
 232
 233         /* Check for SQ overflow */
 234         if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
 235                 spin_unlock_irqrestore(&nesqp->lock, flags);
 236                 return -ENOMEM;
 237         }
 238
 239         wqe = &nesqp->hwqp.sq_vbase[head];
 240         /* nes_debug(NES_DBG_MR, "processing sq wqe at %p, head = %u.\n", wqe, head); */
 241         nes_fill_init_qp_wqe(wqe, nesqp, head);
 242         u64temp = ibmw_bind->wr_id;
 243         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX, u64temp);
 244         wqe_misc = NES_IWARP_SQ_OP_BIND;
 245
 246         wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
 247
 248         if (ibmw_bind->send_flags & IB_SEND_SIGNALED)
 249                 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
 250
 251         if (ibmw_bind->bind_info.mw_access_flags & IB_ACCESS_REMOTE_WRITE)
 252                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE;
 253         if (ibmw_bind->bind_info.mw_access_flags & IB_ACCESS_REMOTE_READ)
 254                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_READ;
 255
 256         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_MISC_IDX, wqe_misc);
 257         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MR_IDX,
 258                             ibmw_bind->bind_info.mr->lkey);
 259         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MW_IDX, ibmw->rkey);
 260         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_LENGTH_LOW_IDX,
 261                         ibmw_bind->bind_info.length);
 262         wqe->wqe_words[NES_IWARP_SQ_BIND_WQE_LENGTH_HIGH_IDX] = 0;
 263         u64temp = (u64)ibmw_bind->bind_info.addr;
 264         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_VA_FBO_LOW_IDX, u64temp);
 265
 266         head++;
 267         if (head >= qsize)
 268                 head = 0;
 269
 270         nesqp->hwqp.sq_head = head;
 271         barrier();
 272
 273         nes_write32(nesdev->regs+NES_WQE_ALLOC,
 274                         (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
 275
 276         spin_unlock_irqrestore(&nesqp->lock, flags);
 277
 278         return 0;
 279 }
 280
 281
 282 /*
 283  * nes_alloc_fast_mr
 284  */
 285 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
 286                              u32 stag, u32 page_count)
 287 {
 288         struct nes_hw_cqp_wqe *cqp_wqe;
 289         struct nes_cqp_request *cqp_request;
 290         unsigned long flags;
 291         int ret;
 292         struct nes_adapter *nesadapter = nesdev->nesadapter;
 293         u32 opcode = 0;
 294         u16 major_code;
 295         u64 region_length = page_count * PAGE_SIZE;
 296
 297
 298         cqp_request = nes_get_cqp_request(nesdev);
 299         if (cqp_request == NULL) {
 300                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 301                 return -ENOMEM;
 302         }
 303         nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
 304                               "region_length = %llu\n",
 305                               page_count, region_length);
 306         cqp_request->waiting = 1;
 307         cqp_wqe = &cqp_request->cqp_wqe;
 308
 309         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 310         if (nesadapter->free_4kpbl > 0) {
 311                 nesadapter->free_4kpbl--;
 312                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 313         } else {
 314                 /* No 4kpbl's available: */
 315                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 316                 nes_debug(NES_DBG_MR, "Out of Pbls\n");
 317                 nes_free_cqp_request(nesdev, cqp_request);
 318                 return -ENOMEM;
 319         }
 320
 321         opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
 322                  NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
 323                  NES_CQP_STAG_REM_ACC_EN;
 324         /*
 325          * The current OFED API does not support the zero based TO option.
 326          * If added then need to changed the NES_CQP_STAG_VA* option.  Also,
 327          * the API does not support that ability to have the MR set for local
 328          * access only when created and not allow the SQ op to override. Given
 329          * this the remote enable must be set here.
 330          */
 331
 332         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 333         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 334         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
 335
 336         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
 337                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
 338         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
 339                         cpu_to_le32(nespd->pd_id & 0x00007fff);
 340
 341         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 342         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
 343         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
 344         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
 345         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
 346         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
 347         barrier();
 348
 349         atomic_set(&cqp_request->refcount, 2);
 350         nes_post_cqp_request(nesdev, cqp_request);
 351
 352         /* Wait for CQP */
 353         ret = wait_event_timeout(cqp_request->waitq,
 354                                  (0 != cqp_request->request_done),
 355                                  NES_EVENT_TIMEOUT);
 356
 357         nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
 358                   "wait_event_timeout ret = %u, CQP Major:Minor codes = "
 359                   "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
 360                   cqp_request->minor_code);
 361         major_code = cqp_request->major_code;
 362         nes_put_cqp_request(nesdev, cqp_request);
 363
 364         if (!ret || major_code) {
 365                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 366                 nesadapter->free_4kpbl++;
 367                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 368         }
 369
 370         if (!ret)
 371                 return -ETIME;
 372         else if (major_code)
 373                 return -EIO;
 374         return 0;
 375 }
 376
 377 /*
 378  * nes_alloc_fast_reg_mr
 379  */
 380 static struct ib_mr *nes_alloc_fast_reg_mr(struct ib_pd *ibpd, int max_page_list_len)
 381 {
 382         struct nes_pd *nespd = to_nespd(ibpd);
 383         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 384         struct nes_device *nesdev = nesvnic->nesdev;
 385         struct nes_adapter *nesadapter = nesdev->nesadapter;
 386
 387         u32 next_stag_index;
 388         u8 stag_key = 0;
 389         u32 driver_key = 0;
 390         int err = 0;
 391         u32 stag_index = 0;
 392         struct nes_mr *nesmr;
 393         u32 stag;
 394         int ret;
 395         struct ib_mr *ibmr;
 396 /*
 397  * Note:  Set to always use a fixed length single page entry PBL.  This is to allow
 398  *       for the fast_reg_mr operation to always know the size of the PBL.
 399  */
 400         if (max_page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 401                 return ERR_PTR(-E2BIG);
 402
 403         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
 404         stag_key = (u8)next_stag_index;
 405         next_stag_index >>= 8;
 406         next_stag_index %= nesadapter->max_mr;
 407
 408         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
 409                                  nesadapter->max_mr, &stag_index,
 410                                  &next_stag_index, NES_RESOURCE_FAST_MR);
 411         if (err)
 412                 return ERR_PTR(err);
 413
 414         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
 415         if (!nesmr) {
 416                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 417                 return ERR_PTR(-ENOMEM);
 418         }
 419
 420         stag = stag_index << 8;
 421         stag |= driver_key;
 422         stag += (u32)stag_key;
 423
 424         nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
 425                   stag, stag_index);
 426
 427         ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_page_list_len);
 428
 429         if (ret == 0) {
 430                 nesmr->ibmr.rkey = stag;
 431                 nesmr->ibmr.lkey = stag;
 432                 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
 433                 ibmr = &nesmr->ibmr;
 434         } else {
 435                 kfree(nesmr);
 436                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 437                 ibmr = ERR_PTR(-ENOMEM);
 438         }
 439         return ibmr;
 440 }
 441
 442 /*
 443  * nes_alloc_fast_reg_page_list
 444  */
 445 static struct ib_fast_reg_page_list *nes_alloc_fast_reg_page_list(
 446                                                         struct ib_device *ibdev,
 447                                                         int page_list_len)
 448 {
 449         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 450         struct nes_device *nesdev = nesvnic->nesdev;
 451         struct ib_fast_reg_page_list *pifrpl;
 452         struct nes_ib_fast_reg_page_list *pnesfrpl;
 453
 454         if (page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 455                 return ERR_PTR(-E2BIG);
 456         /*
 457          * Allocate the ib_fast_reg_page_list structure, the
 458          * nes_fast_bpl structure, and the PLB table.
 459          */
 460         pnesfrpl = kmalloc(sizeof(struct nes_ib_fast_reg_page_list) +
 461                            page_list_len * sizeof(u64), GFP_KERNEL);
 462
 463         if (!pnesfrpl)
 464                 return ERR_PTR(-ENOMEM);
 465
 466         pifrpl = &pnesfrpl->ibfrpl;
 467         pifrpl->page_list = &pnesfrpl->pbl;
 468         pifrpl->max_page_list_len = page_list_len;
 469         /*
 470          * Allocate the WQE PBL
 471          */
 472         pnesfrpl->nes_wqe_pbl.kva = pci_alloc_consistent(nesdev->pcidev,
 473                                                          page_list_len * sizeof(u64),
 474                                                          &pnesfrpl->nes_wqe_pbl.paddr);
 475
 476         if (!pnesfrpl->nes_wqe_pbl.kva) {
 477                 kfree(pnesfrpl);
 478                 return ERR_PTR(-ENOMEM);
 479         }
 480         nes_debug(NES_DBG_MR, "nes_alloc_fast_reg_pbl: nes_frpl = %p, "
 481                   "ibfrpl = %p, ibfrpl.page_list = %p, pbl.kva = %p, "
 482                   "pbl.paddr = %llx\n", pnesfrpl, &pnesfrpl->ibfrpl,
 483                   pnesfrpl->ibfrpl.page_list, pnesfrpl->nes_wqe_pbl.kva,
 484                   (unsigned long long) pnesfrpl->nes_wqe_pbl.paddr);
 485
 486         return pifrpl;
 487 }
 488
 489 /*
 490  * nes_free_fast_reg_page_list
 491  */
 492 static void nes_free_fast_reg_page_list(struct ib_fast_reg_page_list *pifrpl)
 493 {
 494         struct nes_vnic *nesvnic = to_nesvnic(pifrpl->device);
 495         struct nes_device *nesdev = nesvnic->nesdev;
 496         struct nes_ib_fast_reg_page_list *pnesfrpl;
 497
 498         pnesfrpl = container_of(pifrpl, struct nes_ib_fast_reg_page_list, ibfrpl);
 499         /*
 500          * Free the WQE PBL.
 501          */
 502         pci_free_consistent(nesdev->pcidev,
 503                             pifrpl->max_page_list_len * sizeof(u64),
 504                             pnesfrpl->nes_wqe_pbl.kva,
 505                             pnesfrpl->nes_wqe_pbl.paddr);
 506         /*
 507          * Free the PBL structure
 508          */
 509         kfree(pnesfrpl);
 510 }
 511
 512 /**
 513  * nes_query_device
 514  */
 515 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 516 {
 517         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 518         struct nes_device *nesdev = nesvnic->nesdev;
 519         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 520
 521         memset(props, 0, sizeof(*props));
 522         memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
 523
 524         props->fw_ver = nesdev->nesadapter->firmware_version;
 525         props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
 526         props->vendor_id = nesdev->nesadapter->vendor_id;
 527         props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
 528         props->hw_ver = nesdev->nesadapter->hw_rev;
 529         props->max_mr_size = 0x80000000;
 530         props->max_qp = nesibdev->max_qp;
 531         props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 532         props->max_sge = nesdev->nesadapter->max_sge;
 533         props->max_cq = nesibdev->max_cq;
 534         props->max_cqe = nesdev->nesadapter->max_cqe;
 535         props->max_mr = nesibdev->max_mr;
 536         props->max_mw = nesibdev->max_mr;
 537         props->max_pd = nesibdev->max_pd;
 538         props->max_sge_rd = 1;
 539         switch (nesdev->nesadapter->max_irrq_wr) {
 540                 case 0:
 541                         props->max_qp_rd_atom = 2;
 542                         break;
 543                 case 1:
 544                         props->max_qp_rd_atom = 8;
 545                         break;
 546                 case 2:
 547                         props->max_qp_rd_atom = 32;
 548                         break;
 549                 case 3:
 550                         props->max_qp_rd_atom = 64;
 551                         break;
 552                 default:
 553                         props->max_qp_rd_atom = 0;
 554         }
 555         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 556         props->atomic_cap = IB_ATOMIC_NONE;
 557         props->max_map_per_fmr = 1;
 558
 559         return 0;
 560 }
 561
 562
 563 /**
 564  * nes_query_port
 565  */
 566 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 567 {
 568         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 569         struct net_device *netdev = nesvnic->netdev;
 570
 571         memset(props, 0, sizeof(*props));
 572
 573         props->max_mtu = IB_MTU_4096;
 574
 575         if (netdev->mtu  >= 4096)
 576                 props->active_mtu = IB_MTU_4096;
 577         else if (netdev->mtu  >= 2048)
 578                 props->active_mtu = IB_MTU_2048;
 579         else if (netdev->mtu  >= 1024)
 580                 props->active_mtu = IB_MTU_1024;
 581         else if (netdev->mtu  >= 512)
 582                 props->active_mtu = IB_MTU_512;
 583         else
 584                 props->active_mtu = IB_MTU_256;
 585
 586         props->lid = 1;
 587         props->lmc = 0;
 588         props->sm_lid = 0;
 589         props->sm_sl = 0;
 590         if (netif_queue_stopped(netdev))
 591                 props->state = IB_PORT_DOWN;
 592         else if (nesvnic->linkup)
 593                 props->state = IB_PORT_ACTIVE;
 594         else
 595                 props->state = IB_PORT_DOWN;
 596         props->phys_state = 0;
 597         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 598                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 599         props->gid_tbl_len = 1;
 600         props->pkey_tbl_len = 1;
 601         props->qkey_viol_cntr = 0;
 602         props->active_width = IB_WIDTH_4X;
 603         props->active_speed = IB_SPEED_SDR;
 604         props->max_msg_sz = 0x80000000;
 605
 606         return 0;
 607 }
 608
 609
 610 /**
 611  * nes_query_pkey
 612  */
 613 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 614 {
 615         *pkey = 0;
 616         return 0;
 617 }
 618
 619
 620 /**
 621  * nes_query_gid
 622  */
 623 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 624                 int index, union ib_gid *gid)
 625 {
 626         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 627
 628         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 629         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 630
 631         return 0;
 632 }
 633
 634
 635 /**
 636  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 637  * of all objects associated with a particular user-mode client.
 638  */
 639 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 640                 struct ib_udata *udata)
 641 {
 642         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 643         struct nes_device *nesdev = nesvnic->nesdev;
 644         struct nes_adapter *nesadapter = nesdev->nesadapter;
 645         struct nes_alloc_ucontext_req req;
 646         struct nes_alloc_ucontext_resp uresp;
 647         struct nes_ucontext *nes_ucontext;
 648         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 649
 650
 651         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 652                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 653                 return ERR_PTR(-EINVAL);
 654         }
 655
 656         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 657                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 658                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 659                 return ERR_PTR(-EINVAL);
 660         }
 661
 662
 663         memset(&uresp, 0, sizeof uresp);
 664
 665         uresp.max_qps = nesibdev->max_qp;
 666         uresp.max_pds = nesibdev->max_pd;
 667         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 668         uresp.virtwq = nesadapter->virtwq;
 669         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 670
 671         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 672         if (!nes_ucontext)
 673                 return ERR_PTR(-ENOMEM);
 674
 675         nes_ucontext->nesdev = nesdev;
 676         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 677         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 678                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 679                         PAGE_SIZE;
 680
 681
 682         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 683                 kfree(nes_ucontext);
 684                 return ERR_PTR(-EFAULT);
 685         }
 686
 687         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 688         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 689         atomic_set(&nes_ucontext->usecnt, 1);
 690         return &nes_ucontext->ibucontext;
 691 }
 692
 693
 694 /**
 695  * nes_dealloc_ucontext
 696  */
 697 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 698 {
 699         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 700         /* struct nes_device *nesdev = nesvnic->nesdev; */
 701         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 702
 703         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 704           return 0;
 705         kfree(nes_ucontext);
 706         return 0;
 707 }
 708
 709
 710 /**
 711  * nes_mmap
 712  */
 713 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 714 {
 715         unsigned long index;
 716         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 717         struct nes_device *nesdev = nesvnic->nesdev;
 718         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 719         struct nes_ucontext *nes_ucontext;
 720         struct nes_qp *nesqp;
 721
 722         nes_ucontext = to_nesucontext(context);
 723
 724
 725         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 726                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 727                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 728                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 729                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 730                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 731                         return -EFAULT;
 732                 }
 733                 nesqp = nes_ucontext->mmap_nesqp[index];
 734                 if (nesqp == NULL) {
 735                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 736                         return -EFAULT;
 737                 }
 738                 if (remap_pfn_range(vma, vma->vm_start,
 739                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 740                                 vma->vm_end - vma->vm_start,
 741                                 vma->vm_page_prot)) {
 742                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 743                         return -EAGAIN;
 744                 }
 745                 vma->vm_private_data = nesqp;
 746                 return 0;
 747         } else {
 748                 index = vma->vm_pgoff;
 749                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 750                         return -EFAULT;
 751
 752                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 753                 if (io_remap_pfn_range(vma, vma->vm_start,
 754                                 (nesdev->doorbell_start +
 755                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 756                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 757                         return -EAGAIN;
 758                 vma->vm_private_data = nes_ucontext;
 759                 return 0;
 760         }
 761
 762         return -ENOSYS;
 763 }
 764
 765
 766 /**
 767  * nes_alloc_pd
 768  */
 769 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 770                 struct ib_ucontext *context, struct ib_udata *udata)
 771 {
 772         struct nes_pd *nespd;
 773         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 774         struct nes_device *nesdev = nesvnic->nesdev;
 775         struct nes_adapter *nesadapter = nesdev->nesadapter;
 776         struct nes_ucontext *nesucontext;
 777         struct nes_alloc_pd_resp uresp;
 778         u32 pd_num = 0;
 779         int err;
 780
 781         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 782                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 783                         netdev_refcnt_read(nesvnic->netdev));
 784
 785         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 786                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd, NES_RESOURCE_PD);
 787         if (err) {
 788                 return ERR_PTR(err);
 789         }
 790
 791         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 792         if (!nespd) {
 793                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 794                 return ERR_PTR(-ENOMEM);
 795         }
 796
 797         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 798                         nespd, nesvnic->nesibdev->ibdev.name);
 799
 800         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 801
 802         if (context) {
 803                 nesucontext = to_nesucontext(context);
 804                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 805                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 806                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 807                                 nespd->mmap_db_index, nespd->pd_id);
 808                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 809                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 810                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 811                         kfree(nespd);
 812                         return ERR_PTR(-ENOMEM);
 813                 }
 814
 815                 uresp.pd_id = nespd->pd_id;
 816                 uresp.mmap_db_index = nespd->mmap_db_index;
 817                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 818                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 819                         kfree(nespd);
 820                         return ERR_PTR(-EFAULT);
 821                 }
 822
 823                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 824                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 825                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 826         }
 827
 828         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 829         return &nespd->ibpd;
 830 }
 831
 832
 833 /**
 834  * nes_dealloc_pd
 835  */
 836 static int nes_dealloc_pd(struct ib_pd *ibpd)
 837 {
 838         struct nes_ucontext *nesucontext;
 839         struct nes_pd *nespd = to_nespd(ibpd);
 840         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 841         struct nes_device *nesdev = nesvnic->nesdev;
 842         struct nes_adapter *nesadapter = nesdev->nesadapter;
 843
 844         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 845                 nesucontext = to_nesucontext(ibpd->uobject->context);
 846                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 847                                 nespd->mmap_db_index);
 848                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 849                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 850                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 851                         nesucontext->first_free_db = nespd->mmap_db_index;
 852                 }
 853         }
 854
 855         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 856                         nespd->pd_id, nespd);
 857         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 858                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 859         kfree(nespd);
 860
 861         return 0;
 862 }
 863
 864
 865 /**
 866  * nes_create_ah
 867  */
 868 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 869 {
 870         return ERR_PTR(-ENOSYS);
 871 }
 872
 873
 874 /**
 875  * nes_destroy_ah
 876  */
 877 static int nes_destroy_ah(struct ib_ah *ah)
 878 {
 879         return -ENOSYS;
 880 }
 881
 882
 883 /**
 884  * nes_get_encoded_size
 885  */
 886 static inline u8 nes_get_encoded_size(int *size)
 887 {
 888         u8 encoded_size = 0;
 889         if (*size <= 32) {
 890                 *size = 32;
 891                 encoded_size = 1;
 892         } else if (*size <= 128) {
 893                 *size = 128;
 894                 encoded_size = 2;
 895         } else if (*size <= 512) {
 896                 *size = 512;
 897                 encoded_size = 3;
 898         }
 899         return (encoded_size);
 900 }
 901
 902
 903
 904 /**
 905  * nes_setup_virt_qp
 906  */
 907 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 908                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 909 {
 910         unsigned long flags;
 911         void *mem;
 912         __le64 *pbl = NULL;
 913         __le64 *tpbl;
 914         __le64 *pblbuffer;
 915         struct nes_device *nesdev = nesvnic->nesdev;
 916         struct nes_adapter *nesadapter = nesdev->nesadapter;
 917         u32 pbl_entries;
 918         u8 rq_pbl_entries;
 919         u8 sq_pbl_entries;
 920
 921         pbl_entries = nespbl->pbl_size >> 3;
 922         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 923                         nespbl->pbl_size, pbl_entries,
 924                         (void *)nespbl->pbl_vbase,
 925                         (unsigned long) nespbl->pbl_pbase);
 926         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 927         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 928         /* the first pbl to be fro the rq_vbase... */
 929         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 930         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 931         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 932         if (!nespbl->page) {
 933                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 934                 kfree(nespbl);
 935                 return -ENOMEM;
 936         }
 937
 938         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 939         nesqp->page = nespbl->page;
 940         if (!nesqp->hwqp.sq_vbase) {
 941                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 942                 kfree(nespbl);
 943                 return -ENOMEM;
 944         }
 945
 946         /* Now to get to sq.. we need to calculate how many */
 947         /* PBL entries were used by the rq.. */
 948         pbl += sq_pbl_entries;
 949         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 950         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 951         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 952
 953         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 954                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 955                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 956         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 957         if (!nesadapter->free_256pbl) {
 958                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 959                                 nespbl->pbl_pbase);
 960                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 961                 kunmap(nesqp->page);
 962                 kfree(nespbl);
 963                 return -ENOMEM;
 964         }
 965         nesadapter->free_256pbl--;
 966         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 967
 968         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 969         pblbuffer = nesqp->pbl_vbase;
 970         if (!nesqp->pbl_vbase) {
 971                 /* memory allocated during nes_reg_user_mr() */
 972                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 973                                     nespbl->pbl_pbase);
 974                 kfree(nespbl);
 975                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 976                 nesadapter->free_256pbl++;
 977                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 978                 kunmap(nesqp->page);
 979                 return -ENOMEM;
 980         }
 981         memset(nesqp->pbl_vbase, 0, 256);
 982         /* fill in the page address in the pbl buffer.. */
 983         tpbl = pblbuffer + 16;
 984         pbl = (__le64 *)nespbl->pbl_vbase;
 985         while (sq_pbl_entries--)
 986                 *tpbl++ = *pbl++;
 987         tpbl = pblbuffer;
 988         while (rq_pbl_entries--)
 989                 *tpbl++ = *pbl++;
 990
 991         /* done with memory allocated during nes_reg_user_mr() */
 992         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 993                             nespbl->pbl_pbase);
 994         kfree(nespbl);
 995
 996         nesqp->qp_mem_size =
 997                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
 998         /* Round up to a multiple of a page */
 999         nesqp->qp_mem_size += PAGE_SIZE - 1;
1000         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1001
1002         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1003                         &nesqp->hwqp.q2_pbase);
1004
1005         if (!mem) {
1006                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
1007                 nesqp->pbl_vbase = NULL;
1008                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1009                 nesadapter->free_256pbl++;
1010                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1011                 kunmap(nesqp->page);
1012                 return -ENOMEM;
1013         }
1014         nesqp->sq_kmapped = 1;
1015         nesqp->hwqp.q2_vbase = mem;
1016         mem += 256;
1017         memset(nesqp->hwqp.q2_vbase, 0, 256);
1018         nesqp->nesqp_context = mem;
1019         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1020         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1021
1022         return 0;
1023 }
1024
1025
1026 /**
1027  * nes_setup_mmap_qp
1028  */
1029 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
1030                 int sq_size, int rq_size)
1031 {
1032         void *mem;
1033         struct nes_device *nesdev = nesvnic->nesdev;
1034
1035         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
1036                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
1037                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
1038                         256; /* this is Q2 */
1039         /* Round up to a multiple of a page */
1040         nesqp->qp_mem_size += PAGE_SIZE - 1;
1041         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1042
1043         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1044                         &nesqp->hwqp.sq_pbase);
1045         if (!mem)
1046                 return -ENOMEM;
1047         nes_debug(NES_DBG_QP, "PCI consistent memory for "
1048                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
1049                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
1050
1051         memset(mem, 0, nesqp->qp_mem_size);
1052
1053         nesqp->hwqp.sq_vbase = mem;
1054         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
1055
1056         nesqp->hwqp.rq_vbase = mem;
1057         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
1058                         sizeof(struct nes_hw_qp_wqe) * sq_size;
1059         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
1060
1061         nesqp->hwqp.q2_vbase = mem;
1062         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
1063                         sizeof(struct nes_hw_qp_wqe) * rq_size;
1064         mem += 256;
1065         memset(nesqp->hwqp.q2_vbase, 0, 256);
1066
1067         nesqp->nesqp_context = mem;
1068         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1069         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1070         return 0;
1071 }
1072
1073
1074 /**
1075  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
1076  */
1077 static inline void nes_free_qp_mem(struct nes_device *nesdev,
1078                 struct nes_qp *nesqp, int virt_wqs)
1079 {
1080         unsigned long flags;
1081         struct nes_adapter *nesadapter = nesdev->nesadapter;
1082         if (!virt_wqs) {
1083                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1084                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
1085         }else {
1086                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1087                 nesadapter->free_256pbl++;
1088                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1089                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
1090                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
1091                 nesqp->pbl_vbase = NULL;
1092                 if (nesqp->sq_kmapped) {
1093                         nesqp->sq_kmapped = 0;
1094                         kunmap(nesqp->page);
1095                 }
1096         }
1097 }
1098
1099
1100 /**
1101  * nes_create_qp
1102  */
1103 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1104                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1105 {
1106         u64 u64temp= 0;
1107         u64 u64nesqp = 0;
1108         struct nes_pd *nespd = to_nespd(ibpd);
1109         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1110         struct nes_device *nesdev = nesvnic->nesdev;
1111         struct nes_adapter *nesadapter = nesdev->nesadapter;
1112         struct nes_qp *nesqp;
1113         struct nes_cq *nescq;
1114         struct nes_ucontext *nes_ucontext;
1115         struct nes_hw_cqp_wqe *cqp_wqe;
1116         struct nes_cqp_request *cqp_request;
1117         struct nes_create_qp_req req;
1118         struct nes_create_qp_resp uresp;
1119         struct nes_pbl  *nespbl = NULL;
1120         u32 qp_num = 0;
1121         u32 opcode = 0;
1122         /* u32 counter = 0; */
1123         void *mem;
1124         unsigned long flags;
1125         int ret;
1126         int err;
1127         int virt_wqs = 0;
1128         int sq_size;
1129         int rq_size;
1130         u8 sq_encoded_size;
1131         u8 rq_encoded_size;
1132         /* int counter; */
1133
1134         if (init_attr->create_flags)
1135                 return ERR_PTR(-EINVAL);
1136
1137         atomic_inc(&qps_created);
1138         switch (init_attr->qp_type) {
1139                 case IB_QPT_RC:
1140                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1141                                 init_attr->cap.max_inline_data = 0;
1142                         } else {
1143                                 init_attr->cap.max_inline_data = 64;
1144                         }
1145                         sq_size = init_attr->cap.max_send_wr;
1146                         rq_size = init_attr->cap.max_recv_wr;
1147
1148                         /* check if the encoded sizes are OK or not... */
1149                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1150                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1151
1152                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1153                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1154                                                 rq_size, sq_size);
1155                                 return ERR_PTR(-EINVAL);
1156                         }
1157
1158                         init_attr->cap.max_send_wr = sq_size -2;
1159                         init_attr->cap.max_recv_wr = rq_size -1;
1160                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1161
1162                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1163                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp, NES_RESOURCE_QP);
1164                         if (ret) {
1165                                 return ERR_PTR(ret);
1166                         }
1167
1168                         /* Need 512 (actually now 1024) byte alignment on this structure */
1169                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1170                         if (!mem) {
1171                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1172                                 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1173                                 return ERR_PTR(-ENOMEM);
1174                         }
1175                         u64nesqp = (unsigned long)mem;
1176                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1177                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1178                         u64nesqp &= ~u64temp;
1179                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1180                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1181                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1182                         nesqp->allocated_buffer = mem;
1183
1184                         if (udata) {
1185                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1186                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1187                                         kfree(nesqp->allocated_buffer);
1188                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1189                                         return ERR_PTR(-EFAULT);
1190                                 }
1191                                 if (req.user_wqe_buffers) {
1192                                         virt_wqs = 1;
1193                                 }
1194                                 if (req.user_qp_buffer)
1195                                         nesqp->nesuqp_addr = req.user_qp_buffer;
1196                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1197                                         nesqp->user_mode = 1;
1198                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1199                                         if (virt_wqs) {
1200                                                 err = 1;
1201                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1202                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1203                                                                 list_del(&nespbl->list);
1204                                                                 err = 0;
1205                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1206                                                                           nespbl, nespbl->user_base);
1207                                                                 break;
1208                                                         }
1209                                                 }
1210                                                 if (err) {
1211                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1212                                                                   (long long unsigned int)req.user_wqe_buffers);
1213                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1214                                                         kfree(nesqp->allocated_buffer);
1215                                                         return ERR_PTR(-EFAULT);
1216                                                 }
1217                                         }
1218
1219                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1220                                         nesqp->mmap_sq_db_index =
1221                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1222                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1223                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1224                                                         nespd->mmap_db_index); */
1225                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1226                                                 nes_debug(NES_DBG_QP,
1227                                                           "db index > max user regions, failing create QP\n");
1228                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1229                                                 if (virt_wqs) {
1230                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1231                                                                             nespbl->pbl_pbase);
1232                                                         kfree(nespbl);
1233                                                 }
1234                                                 kfree(nesqp->allocated_buffer);
1235                                                 return ERR_PTR(-ENOMEM);
1236                                         }
1237                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1238                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1239                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1240                                 } else {
1241                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1242                                         kfree(nesqp->allocated_buffer);
1243                                         return ERR_PTR(-EFAULT);
1244                                 }
1245                         }
1246                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1247                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1248                         if (err) {
1249                                 nes_debug(NES_DBG_QP,
1250                                           "error geting qp mem code = %d\n", err);
1251                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1252                                 kfree(nesqp->allocated_buffer);
1253                                 return ERR_PTR(-ENOMEM);
1254                         }
1255
1256                         nesqp->hwqp.sq_size = sq_size;
1257                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1258                         nesqp->hwqp.sq_head = 1;
1259                         nesqp->hwqp.rq_size = rq_size;
1260                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1261                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1262                                         (void *)nesqp->nesqp_context_pbase);
1263                         */
1264                         nesqp->hwqp.qp_id = qp_num;
1265                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1266                         nesqp->nespd = nespd;
1267
1268                         nescq = to_nescq(init_attr->send_cq);
1269                         nesqp->nesscq = nescq;
1270                         nescq = to_nescq(init_attr->recv_cq);
1271                         nesqp->nesrcq = nescq;
1272
1273                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1274                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1275                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1276                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1277                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1278                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1279                         if (!udata) {
1280                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1281                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1282                         }
1283                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1284                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1285                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1286                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1287                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1288
1289
1290                         if (!virt_wqs) {
1291                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1292                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1293                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1294                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1295                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1296                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1297                         } else {
1298                                 u64temp = (u64)nesqp->pbl_pbase;
1299                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1300                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1301                         }
1302
1303                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1304                                         nesvnic->next_qp_nic_index,
1305                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1306                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1307                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1308                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1309                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1310                         nesvnic->next_qp_nic_index++;
1311                         if ((nesvnic->next_qp_nic_index > 3) ||
1312                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1313                                 nesvnic->next_qp_nic_index = 0;
1314                         }
1315                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1316
1317                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1318                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1319                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1320                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1321                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1322                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1323                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1324                                         NES_QPCONTEXT_ORDIRD_AAH |
1325                                         ((((u32)nesadapter->max_irrq_wr) <<
1326                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1327                         if (disable_mpa_crc) {
1328                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1329                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1330                         }
1331
1332
1333                         /* Create the QP */
1334                         cqp_request = nes_get_cqp_request(nesdev);
1335                         if (cqp_request == NULL) {
1336                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1337                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1338                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1339                                 kfree(nesqp->allocated_buffer);
1340                                 return ERR_PTR(-ENOMEM);
1341                         }
1342                         cqp_request->waiting = 1;
1343                         cqp_wqe = &cqp_request->cqp_wqe;
1344
1345                         if (!virt_wqs) {
1346                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1347                                         NES_CQP_QP_IWARP_STATE_IDLE;
1348                         } else {
1349                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1350                                         NES_CQP_QP_IWARP_STATE_IDLE;
1351                         }
1352                         opcode |= NES_CQP_QP_CQS_VALID;
1353                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1354                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1355                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1356
1357                         u64temp = (u64)nesqp->nesqp_context_pbase;
1358                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1359
1360                         atomic_set(&cqp_request->refcount, 2);
1361                         nes_post_cqp_request(nesdev, cqp_request);
1362
1363                         /* Wait for CQP */
1364                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1365                                         nesqp->hwqp.qp_id);
1366                         ret = wait_event_timeout(cqp_request->waitq,
1367                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1368                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1369                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1370                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1371                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1372                                         cqp_request->major_code, cqp_request->minor_code);
1373                         if ((!ret) || (cqp_request->major_code)) {
1374                                 nes_put_cqp_request(nesdev, cqp_request);
1375                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1376                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1377                                 kfree(nesqp->allocated_buffer);
1378                                 if (!ret) {
1379                                         return ERR_PTR(-ETIME);
1380                                 } else {
1381                                         return ERR_PTR(-EIO);
1382                                 }
1383                         }
1384
1385                         nes_put_cqp_request(nesdev, cqp_request);
1386
1387                         if (ibpd->uobject) {
1388                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1389                                 uresp.mmap_rq_db_index = 0;
1390                                 uresp.actual_sq_size = sq_size;
1391                                 uresp.actual_rq_size = rq_size;
1392                                 uresp.qp_id = nesqp->hwqp.qp_id;
1393                                 uresp.nes_drv_opt = nes_drv_opt;
1394                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1395                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1396                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1397                                         kfree(nesqp->allocated_buffer);
1398                                         return ERR_PTR(-EFAULT);
1399                                 }
1400                         }
1401
1402                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1403                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1404                         spin_lock_init(&nesqp->lock);
1405                         nes_add_ref(&nesqp->ibqp);
1406                         break;
1407                 default:
1408                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1409                         return ERR_PTR(-EINVAL);
1410         }
1411
1412         nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1413         init_timer(&nesqp->terminate_timer);
1414         nesqp->terminate_timer.function = nes_terminate_timeout;
1415         nesqp->terminate_timer.data = (unsigned long)nesqp;
1416
1417         /* update the QP table */
1418         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1419         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1420                         netdev_refcnt_read(nesvnic->netdev));
1421
1422         return &nesqp->ibqp;
1423 }
1424
1425 /**
1426  * nes_clean_cq
1427  */
1428 static void nes_clean_cq(struct nes_qp *nesqp, struct nes_cq *nescq)
1429 {
1430         u32 cq_head;
1431         u32 lo;
1432         u32 hi;
1433         u64 u64temp;
1434         unsigned long flags = 0;
1435
1436         spin_lock_irqsave(&nescq->lock, flags);
1437
1438         cq_head = nescq->hw_cq.cq_head;
1439         while (le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_VALID) {
1440                 rmb();
1441                 lo = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
1442                 hi = le32_to_cpu(nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX]);
1443                 u64temp = (((u64)hi) << 32) | ((u64)lo);
1444                 u64temp &= ~(NES_SW_CONTEXT_ALIGN-1);
1445                 if (u64temp == (u64)(unsigned long)nesqp) {
1446                         /* Zero the context value so cqe will be ignored */
1447                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] = 0;
1448                         nescq->hw_cq.cq_vbase[cq_head].cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX] = 0;
1449                 }
1450
1451                 if (++cq_head >= nescq->hw_cq.cq_size)
1452                         cq_head = 0;
1453         }
1454
1455         spin_unlock_irqrestore(&nescq->lock, flags);
1456 }
1457
1458
1459 /**
1460  * nes_destroy_qp
1461  */
1462 static int nes_destroy_qp(struct ib_qp *ibqp)
1463 {
1464         struct nes_qp *nesqp = to_nesqp(ibqp);
1465         struct nes_ucontext *nes_ucontext;
1466         struct ib_qp_attr attr;
1467         struct iw_cm_id *cm_id;
1468         struct iw_cm_event cm_event;
1469         int ret = 0;
1470
1471         atomic_inc(&sw_qps_destroyed);
1472         nesqp->destroyed = 1;
1473
1474         /* Blow away the connection if it exists. */
1475         if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
1476                 /* if (nesqp->ibqp_state == IB_QPS_RTS) { */
1477                 attr.qp_state = IB_QPS_ERR;
1478                 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
1479         }
1480
1481         if (((nesqp->ibqp_state == IB_QPS_INIT) ||
1482                         (nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
1483                 cm_id = nesqp->cm_id;
1484                 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
1485                 cm_event.status = -ETIMEDOUT;
1486                 cm_event.local_addr = cm_id->local_addr;
1487                 cm_event.remote_addr = cm_id->remote_addr;
1488                 cm_event.private_data = NULL;
1489                 cm_event.private_data_len = 0;
1490
1491                 nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
1492                                 "QP%u. cm_id = %p, refcount = %u. \n",
1493                                 nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
1494
1495                 cm_id->rem_ref(cm_id);
1496                 ret = cm_id->event_handler(cm_id, &cm_event);
1497                 if (ret)
1498                         nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
1499         }
1500
1501         if (nesqp->user_mode) {
1502                 if ((ibqp->uobject)&&(ibqp->uobject->context)) {
1503                         nes_ucontext = to_nesucontext(ibqp->uobject->context);
1504                         clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1505                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
1506                         if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
1507                                 nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
1508                         }
1509                 }
1510                 if (nesqp->pbl_pbase && nesqp->sq_kmapped) {
1511                         nesqp->sq_kmapped = 0;
1512                         kunmap(nesqp->page);
1513                 }
1514         } else {
1515                 /* Clean any pending completions from the cq(s) */
1516                 if (nesqp->nesscq)
1517                         nes_clean_cq(nesqp, nesqp->nesscq);
1518
1519                 if ((nesqp->nesrcq) && (nesqp->nesrcq != nesqp->nesscq))
1520                         nes_clean_cq(nesqp, nesqp->nesrcq);
1521         }
1522         nes_rem_ref(&nesqp->ibqp);
1523         return 0;
1524 }
1525
1526
1527 /**
1528  * nes_create_cq
1529  */
1530 static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
1531                 int comp_vector,
1532                 struct ib_ucontext *context, struct ib_udata *udata)
1533 {
1534         u64 u64temp;
1535         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1536         struct nes_device *nesdev = nesvnic->nesdev;
1537         struct nes_adapter *nesadapter = nesdev->nesadapter;
1538         struct nes_cq *nescq;
1539         struct nes_ucontext *nes_ucontext = NULL;
1540         struct nes_cqp_request *cqp_request;
1541         void *mem = NULL;
1542         struct nes_hw_cqp_wqe *cqp_wqe;
1543         struct nes_pbl *nespbl = NULL;
1544         struct nes_create_cq_req req;
1545         struct nes_create_cq_resp resp;
1546         u32 cq_num = 0;
1547         u32 opcode = 0;
1548         u32 pbl_entries = 1;
1549         int err;
1550         unsigned long flags;
1551         int ret;
1552
1553         if (entries > nesadapter->max_cqe)
1554                 return ERR_PTR(-EINVAL);
1555
1556         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1557                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq, NES_RESOURCE_CQ);
1558         if (err) {
1559                 return ERR_PTR(err);
1560         }
1561
1562         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1563         if (!nescq) {
1564                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1565                 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1566                 return ERR_PTR(-ENOMEM);
1567         }
1568
1569         nescq->hw_cq.cq_size = max(entries + 1, 5);
1570         nescq->hw_cq.cq_number = cq_num;
1571         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1572
1573
1574         if (context) {
1575                 nes_ucontext = to_nesucontext(context);
1576                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1577                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1578                         kfree(nescq);
1579                         return ERR_PTR(-EFAULT);
1580                 }
1581                 nesvnic->mcrq_ucontext = nes_ucontext;
1582                 nes_ucontext->mcrqf = req.mcrqf;
1583                 if (nes_ucontext->mcrqf) {
1584                         if (nes_ucontext->mcrqf & 0x80000000)
1585                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1586                         else if (nes_ucontext->mcrqf & 0x40000000)
1587                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1588                         else
1589                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1590                         nescq->mcrqf = nes_ucontext->mcrqf;
1591                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1592                 }
1593                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1594                                 (unsigned long)req.user_cq_buffer, entries);
1595                 err = 1;
1596                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1597                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1598                                 list_del(&nespbl->list);
1599                                 err = 0;
1600                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1601                                                 nespbl);
1602                                 break;
1603                         }
1604                 }
1605                 if (err) {
1606                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1607                         kfree(nescq);
1608                         return ERR_PTR(-EFAULT);
1609                 }
1610
1611                 pbl_entries = nespbl->pbl_size >> 3;
1612                 nescq->cq_mem_size = 0;
1613         } else {
1614                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1615                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1616                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1617
1618                 /* allocate the physical buffer space */
1619                 mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1620                                 &nescq->hw_cq.cq_pbase);
1621                 if (!mem) {
1622                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1623                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1624                         kfree(nescq);
1625                         return ERR_PTR(-ENOMEM);
1626                 }
1627
1628                 memset(mem, 0, nescq->cq_mem_size);
1629                 nescq->hw_cq.cq_vbase = mem;
1630                 nescq->hw_cq.cq_head = 0;
1631                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1632                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1633                                 (u32)nescq->hw_cq.cq_pbase);
1634         }
1635
1636         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1637         spin_lock_init(&nescq->lock);
1638
1639         /* send CreateCQ request to CQP */
1640         cqp_request = nes_get_cqp_request(nesdev);
1641         if (cqp_request == NULL) {
1642                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1643                 if (!context)
1644                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1645                                         nescq->hw_cq.cq_pbase);
1646                 else {
1647                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1648                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1649                         kfree(nespbl);
1650                 }
1651
1652                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1653                 kfree(nescq);
1654                 return ERR_PTR(-ENOMEM);
1655         }
1656         cqp_request->waiting = 1;
1657         cqp_wqe = &cqp_request->cqp_wqe;
1658
1659         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1660                         NES_CQP_CQ_CHK_OVERFLOW |
1661                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1662
1663         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1664
1665         if (pbl_entries != 1) {
1666                 if (pbl_entries > 32) {
1667                         /* use 4k pbl */
1668                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1669                         if (nesadapter->free_4kpbl == 0) {
1670                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1671                                 nes_free_cqp_request(nesdev, cqp_request);
1672                                 if (!context)
1673                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1674                                                         nescq->hw_cq.cq_pbase);
1675                                 else {
1676                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1677                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1678                                         kfree(nespbl);
1679                                 }
1680                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1681                                 kfree(nescq);
1682                                 return ERR_PTR(-ENOMEM);
1683                         } else {
1684                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1685                                 nescq->virtual_cq = 2;
1686                                 nesadapter->free_4kpbl--;
1687                         }
1688                 } else {
1689                         /* use 256 byte pbl */
1690                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1691                         if (nesadapter->free_256pbl == 0) {
1692                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1693                                 nes_free_cqp_request(nesdev, cqp_request);
1694                                 if (!context)
1695                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1696                                                         nescq->hw_cq.cq_pbase);
1697                                 else {
1698                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1699                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1700                                         kfree(nespbl);
1701                                 }
1702                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1703                                 kfree(nescq);
1704                                 return ERR_PTR(-ENOMEM);
1705                         } else {
1706                                 opcode |= NES_CQP_CQ_VIRT;
1707                                 nescq->virtual_cq = 1;
1708                                 nesadapter->free_256pbl--;
1709                         }
1710                 }
1711         }
1712
1713         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1714
1715         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1716         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1717         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1718                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1719
1720         if (context) {
1721                 if (pbl_entries != 1)
1722                         u64temp = (u64)nespbl->pbl_pbase;
1723                 else
1724                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1725                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1726                                 nes_ucontext->mmap_db_index[0]);
1727         } else {
1728                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1729                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1730         }
1731         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1732         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1733         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1734         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1735                         cpu_to_le32((u32)(u64temp >> 1));
1736         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1737                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1738
1739         atomic_set(&cqp_request->refcount, 2);
1740         nes_post_cqp_request(nesdev, cqp_request);
1741
1742         /* Wait for CQP */
1743         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1744                         nescq->hw_cq.cq_number);
1745         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1746                         NES_EVENT_TIMEOUT * 2);
1747         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1748                         nescq->hw_cq.cq_number, ret);
1749         if ((!ret) || (cqp_request->major_code)) {
1750                 nes_put_cqp_request(nesdev, cqp_request);
1751                 if (!context)
1752                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1753                                         nescq->hw_cq.cq_pbase);
1754                 else {
1755                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1756                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1757                         kfree(nespbl);
1758                 }
1759                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1760                 kfree(nescq);
1761                 return ERR_PTR(-EIO);
1762         }
1763         nes_put_cqp_request(nesdev, cqp_request);
1764
1765         if (context) {
1766                 /* free the nespbl */
1767                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1768                                 nespbl->pbl_pbase);
1769                 kfree(nespbl);
1770                 resp.cq_id = nescq->hw_cq.cq_number;
1771                 resp.cq_size = nescq->hw_cq.cq_size;
1772                 resp.mmap_db_index = 0;
1773                 if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) {
1774                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1775                         kfree(nescq);
1776                         return ERR_PTR(-EFAULT);
1777                 }
1778         }
1779
1780         return &nescq->ibcq;
1781 }
1782
1783
1784 /**
1785  * nes_destroy_cq
1786  */
1787 static int nes_destroy_cq(struct ib_cq *ib_cq)
1788 {
1789         struct nes_cq *nescq;
1790         struct nes_device *nesdev;
1791         struct nes_vnic *nesvnic;
1792         struct nes_adapter *nesadapter;
1793         struct nes_hw_cqp_wqe *cqp_wqe;
1794         struct nes_cqp_request *cqp_request;
1795         unsigned long flags;
1796         u32 opcode = 0;
1797         int ret;
1798
1799         if (ib_cq == NULL)
1800                 return 0;
1801
1802         nescq = to_nescq(ib_cq);
1803         nesvnic = to_nesvnic(ib_cq->device);
1804         nesdev = nesvnic->nesdev;
1805         nesadapter = nesdev->nesadapter;
1806
1807         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1808
1809         /* Send DestroyCQ request to CQP */
1810         cqp_request = nes_get_cqp_request(nesdev);
1811         if (cqp_request == NULL) {
1812                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1813                 return -ENOMEM;
1814         }
1815         cqp_request->waiting = 1;
1816         cqp_wqe = &cqp_request->cqp_wqe;
1817         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1818         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1819         if (nescq->virtual_cq == 1) {
1820                 nesadapter->free_256pbl++;
1821                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1822                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1823                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1824                 }
1825         } else if (nescq->virtual_cq == 2) {
1826                 nesadapter->free_4kpbl++;
1827                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1828                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1829                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1830                 }
1831                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1832         }
1833
1834         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1835
1836         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1837         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1838         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1839                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1840         if (!nescq->mcrqf)
1841                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1842
1843         atomic_set(&cqp_request->refcount, 2);
1844         nes_post_cqp_request(nesdev, cqp_request);
1845
1846         /* Wait for CQP */
1847         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1848                         nescq->hw_cq.cq_number);
1849         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1850                         NES_EVENT_TIMEOUT);
1851         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1852                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1853                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1854                         cqp_request->minor_code);
1855         if (!ret) {
1856                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1857                                         nescq->hw_cq.cq_number);
1858                 ret = -ETIME;
1859         } else if (cqp_request->major_code) {
1860                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1861                                         nescq->hw_cq.cq_number);
1862                 ret = -EIO;
1863         } else {
1864                 ret = 0;
1865         }
1866         nes_put_cqp_request(nesdev, cqp_request);
1867
1868         if (nescq->cq_mem_size)
1869                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1870                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1871         kfree(nescq);
1872
1873         return ret;
1874 }
1875
1876 /**
1877  * root_256
1878  */
1879 static u32 root_256(struct nes_device *nesdev,
1880                     struct nes_root_vpbl *root_vpbl,
1881                     struct nes_root_vpbl *new_root,
1882                     u16 pbl_count_4k)
1883 {
1884         u64 leaf_pbl;
1885         int i, j, k;
1886
1887         if (pbl_count_4k == 1) {
1888                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1889                                                 512, &new_root->pbl_pbase);
1890
1891                 if (new_root->pbl_vbase == NULL)
1892                         return 0;
1893
1894                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1895                 for (i = 0; i < 16; i++) {
1896                         new_root->pbl_vbase[i].pa_low =
1897                                 cpu_to_le32((u32)leaf_pbl);
1898                         new_root->pbl_vbase[i].pa_high =
1899                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1900                         leaf_pbl += 256;
1901                 }
1902         } else {
1903                 for (i = 3; i >= 0; i--) {
1904                         j = i * 16;
1905                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1906                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1907                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1908                                 << 32);
1909                         for (k = 1; k < 16; k++) {
1910                                 leaf_pbl += 256;
1911                                 root_vpbl->pbl_vbase[j + k].pa_low =
1912                                                 cpu_to_le32((u32)leaf_pbl);
1913                                 root_vpbl->pbl_vbase[j + k].pa_high =
1914                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1915                         }
1916                 }
1917         }
1918
1919         return 1;
1920 }
1921
1922
1923 /**
1924  * nes_reg_mr
1925  */
1926 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1927                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1928                 dma_addr_t single_buffer, u16 pbl_count_4k,
1929                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1930                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1931 {
1932         struct nes_hw_cqp_wqe *cqp_wqe;
1933         struct nes_cqp_request *cqp_request;
1934         unsigned long flags;
1935         int ret;
1936         struct nes_adapter *nesadapter = nesdev->nesadapter;
1937         uint pg_cnt = 0;
1938         u16 pbl_count_256 = 0;
1939         u16 pbl_count = 0;
1940         u8  use_256_pbls = 0;
1941         u8  use_4k_pbls = 0;
1942         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1943         struct nes_root_vpbl new_root = { 0, NULL, NULL };
1944         u32 opcode = 0;
1945         u16 major_code;
1946
1947         /* Register the region with the adapter */
1948         cqp_request = nes_get_cqp_request(nesdev);
1949         if (cqp_request == NULL) {
1950                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1951                 return -ENOMEM;
1952         }
1953         cqp_request->waiting = 1;
1954         cqp_wqe = &cqp_request->cqp_wqe;
1955
1956         if (pbl_count_4k) {
1957                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1958
1959                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1960                 pbl_count_256 = (pg_cnt + 31) / 32;
1961                 if (pg_cnt <= 32) {
1962                         if (pbl_count_256 <= nesadapter->free_256pbl)
1963                                 use_256_pbls = 1;
1964                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1965                                 use_4k_pbls = 1;
1966                 } else if (pg_cnt <= 2048) {
1967                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1968                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1969                                 use_4k_pbls = 1;
1970                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1971                                 use_256_pbls = 1;
1972                                 use_two_level = 1;
1973                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1974                                 use_4k_pbls = 1;
1975                         }
1976                 } else {
1977                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1978                                 use_4k_pbls = 1;
1979                 }
1980
1981                 if (use_256_pbls) {
1982                         pbl_count = pbl_count_256;
1983                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1984                 } else if (use_4k_pbls) {
1985                         pbl_count =  pbl_count_4k;
1986                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1987                 } else {
1988                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1989                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1990                         nes_free_cqp_request(nesdev, cqp_request);
1991                         return -ENOMEM;
1992                 }
1993
1994                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1995         }
1996
1997         if (use_256_pbls && use_two_level) {
1998                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
1999                         if (new_root.pbl_pbase != 0)
2000                                 root_vpbl = &new_root;
2001                 } else {
2002                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2003                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
2004                         use_256_pbls = 0;
2005
2006                         if (pbl_count_4k == 1)
2007                                 use_two_level = 0;
2008                         pbl_count = pbl_count_4k;
2009
2010                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
2011                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
2012                                 use_4k_pbls = 1;
2013                         }
2014                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2015
2016                         if (use_4k_pbls == 0)
2017                                 return -ENOMEM;
2018                 }
2019         }
2020
2021         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
2022                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
2023         if (acc & IB_ACCESS_LOCAL_WRITE)
2024                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
2025         if (acc & IB_ACCESS_REMOTE_WRITE)
2026                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
2027         if (acc & IB_ACCESS_REMOTE_READ)
2028                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
2029         if (acc & IB_ACCESS_MW_BIND)
2030                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
2031
2032         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2033         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
2034         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
2035         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
2036
2037         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
2038                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
2039         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
2040                         cpu_to_le32(nespd->pd_id & 0x00007fff);
2041         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
2042
2043         if (pbl_count == 0) {
2044                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
2045         } else {
2046                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
2047                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
2048                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
2049
2050                 if (use_4k_pbls)
2051                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
2052         }
2053         barrier();
2054
2055         atomic_set(&cqp_request->refcount, 2);
2056         nes_post_cqp_request(nesdev, cqp_request);
2057
2058         /* Wait for CQP */
2059         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
2060                         NES_EVENT_TIMEOUT);
2061         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
2062                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2063                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
2064         major_code = cqp_request->major_code;
2065         nes_put_cqp_request(nesdev, cqp_request);
2066
2067         if ((!ret || major_code) && pbl_count != 0) {
2068                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2069                 if (use_256_pbls)
2070                         nesadapter->free_256pbl += pbl_count + use_two_level;
2071                 else if (use_4k_pbls)
2072                         nesadapter->free_4kpbl += pbl_count + use_two_level;
2073                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2074         }
2075         if (new_root.pbl_pbase)
2076                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
2077                                     new_root.pbl_pbase);
2078
2079         if (!ret)
2080                 return -ETIME;
2081         else if (major_code)
2082                 return -EIO;
2083
2084         *actual_pbl_cnt = pbl_count + use_two_level;
2085         *used_4k_pbls = use_4k_pbls;
2086         return 0;
2087 }
2088
2089
2090 /**
2091  * nes_reg_phys_mr
2092  */
2093 static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
2094                 struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
2095                 u64 * iova_start)
2096 {
2097         u64 region_length;
2098         struct nes_pd *nespd = to_nespd(ib_pd);
2099         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2100         struct nes_device *nesdev = nesvnic->nesdev;
2101         struct nes_adapter *nesadapter = nesdev->nesadapter;
2102         struct nes_mr *nesmr;
2103         struct ib_mr *ibmr;
2104         struct nes_vpbl vpbl;
2105         struct nes_root_vpbl root_vpbl;
2106         u32 stag;
2107         u32 i;
2108         unsigned long mask;
2109         u32 stag_index = 0;
2110         u32 next_stag_index = 0;
2111         u32 driver_key = 0;
2112         u32 root_pbl_index = 0;
2113         u32 cur_pbl_index = 0;
2114         int err = 0;
2115         int ret = 0;
2116         u16 pbl_count = 0;
2117         u8 single_page = 1;
2118         u8 stag_key = 0;
2119
2120         region_length = 0;
2121         vpbl.pbl_vbase = NULL;
2122         root_vpbl.pbl_vbase = NULL;
2123         root_vpbl.pbl_pbase = 0;
2124
2125         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2126         stag_key = (u8)next_stag_index;
2127
2128         driver_key = 0;
2129
2130         next_stag_index >>= 8;
2131         next_stag_index %= nesadapter->max_mr;
2132         if (num_phys_buf > (1024*512)) {
2133                 return ERR_PTR(-E2BIG);
2134         }
2135
2136         if ((buffer_list[0].addr ^ *iova_start) & ~PAGE_MASK)
2137                 return ERR_PTR(-EINVAL);
2138
2139         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2140                         &stag_index, &next_stag_index, NES_RESOURCE_PHYS_MR);
2141         if (err) {
2142                 return ERR_PTR(err);
2143         }
2144
2145         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2146         if (!nesmr) {
2147                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2148                 return ERR_PTR(-ENOMEM);
2149         }
2150
2151         for (i = 0; i < num_phys_buf; i++) {
2152
2153                 if ((i & 0x01FF) == 0) {
2154                         if (root_pbl_index == 1) {
2155                                 /* Allocate the root PBL */
2156                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
2157                                                 &root_vpbl.pbl_pbase);
2158                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2159                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2160                                 if (!root_vpbl.pbl_vbase) {
2161                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2162                                                         vpbl.pbl_pbase);
2163                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2164                                         kfree(nesmr);
2165                                         return ERR_PTR(-ENOMEM);
2166                                 }
2167                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
2168                                 if (!root_vpbl.leaf_vpbl) {
2169                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2170                                                         root_vpbl.pbl_pbase);
2171                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2172                                                         vpbl.pbl_pbase);
2173                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2174                                         kfree(nesmr);
2175                                         return ERR_PTR(-ENOMEM);
2176                                 }
2177                                 root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
2178                                 root_vpbl.pbl_vbase[0].pa_high =
2179                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2180                                 root_vpbl.leaf_vpbl[0] = vpbl;
2181                         }
2182                         /* Allocate a 4K buffer for the PBL */
2183                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2184                                         &vpbl.pbl_pbase);
2185                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2186                                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2187                         if (!vpbl.pbl_vbase) {
2188                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2189                                 ibmr = ERR_PTR(-ENOMEM);
2190                                 kfree(nesmr);
2191                                 goto reg_phys_err;
2192                         }
2193                         /* Fill in the root table */
2194                         if (1 <= root_pbl_index) {
2195                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2196                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2197                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2198                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2199                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2200                         }
2201                         root_pbl_index++;
2202                         cur_pbl_index = 0;
2203                 }
2204
2205                 mask = !buffer_list[i].size;
2206                 if (i != 0)
2207                         mask |= buffer_list[i].addr;
2208                 if (i != num_phys_buf - 1)
2209                         mask |= buffer_list[i].addr + buffer_list[i].size;
2210
2211                 if (mask & ~PAGE_MASK) {
2212                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2213                         nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2214                         ibmr = ERR_PTR(-EINVAL);
2215                         kfree(nesmr);
2216                         goto reg_phys_err;
2217                 }
2218
2219                 region_length += buffer_list[i].size;
2220                 if ((i != 0) && (single_page)) {
2221                         if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
2222                                 single_page = 0;
2223                 }
2224                 vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr & PAGE_MASK);
2225                 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
2226                                 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
2227         }
2228
2229         stag = stag_index << 8;
2230         stag |= driver_key;
2231         stag += (u32)stag_key;
2232
2233         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2234                         " length = 0x%016lX, index = 0x%08X\n",
2235                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2236
2237         /* Make the leaf PBL the root if only one PBL */
2238         if (root_pbl_index == 1) {
2239                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2240         }
2241
2242         if (single_page) {
2243                 pbl_count = 0;
2244         } else {
2245                 pbl_count = root_pbl_index;
2246         }
2247         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2248                         buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start,
2249                         &nesmr->pbls_used, &nesmr->pbl_4k);
2250
2251         if (ret == 0) {
2252                 nesmr->ibmr.rkey = stag;
2253                 nesmr->ibmr.lkey = stag;
2254                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2255                 ibmr = &nesmr->ibmr;
2256         } else {
2257                 kfree(nesmr);
2258                 ibmr = ERR_PTR(-ENOMEM);
2259         }
2260
2261         reg_phys_err:
2262         /* free the resources */
2263         if (root_pbl_index == 1) {
2264                 /* single PBL case */
2265                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2266         } else {
2267                 for (i=0; i<root_pbl_index; i++) {
2268                         pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
2269                                         root_vpbl.leaf_vpbl[i].pbl_pbase);
2270                 }
2271                 kfree(root_vpbl.leaf_vpbl);
2272                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2273                                 root_vpbl.pbl_pbase);
2274         }
2275
2276         return ibmr;
2277 }
2278
2279
2280 /**
2281  * nes_get_dma_mr
2282  */
2283 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2284 {
2285         struct ib_phys_buf bl;
2286         u64 kva = 0;
2287
2288         nes_debug(NES_DBG_MR, "\n");
2289
2290         bl.size = (u64)0xffffffffffULL;
2291         bl.addr = 0;
2292         return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
2293 }
2294
2295
2296 /**
2297  * nes_reg_user_mr
2298  */
2299 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2300                 u64 virt, int acc, struct ib_udata *udata)
2301 {
2302         u64 iova_start;
2303         __le64 *pbl;
2304         u64 region_length;
2305         dma_addr_t last_dma_addr = 0;
2306         dma_addr_t first_dma_addr = 0;
2307         struct nes_pd *nespd = to_nespd(pd);
2308         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2309         struct nes_device *nesdev = nesvnic->nesdev;
2310         struct nes_adapter *nesadapter = nesdev->nesadapter;
2311         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2312         struct scatterlist *sg;
2313         struct nes_ucontext *nes_ucontext;
2314         struct nes_pbl *nespbl;
2315         struct nes_mr *nesmr;
2316         struct ib_umem *region;
2317         struct nes_mem_reg_req req;
2318         struct nes_vpbl vpbl;
2319         struct nes_root_vpbl root_vpbl;
2320         int entry, page_index;
2321         int page_count = 0;
2322         int err, pbl_depth = 0;
2323         int chunk_pages;
2324         int ret;
2325         u32 stag;
2326         u32 stag_index = 0;
2327         u32 next_stag_index;
2328         u32 driver_key;
2329         u32 root_pbl_index = 0;
2330         u32 cur_pbl_index = 0;
2331         u32 skip_pages;
2332         u16 pbl_count;
2333         u8 single_page = 1;
2334         u8 stag_key;
2335         int first_page = 1;
2336
2337         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2338         if (IS_ERR(region)) {
2339                 return (struct ib_mr *)region;
2340         }
2341
2342         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2343                         " offset = %u, page size = %u.\n",
2344                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2345                         region->offset, region->page_size);
2346
2347         skip_pages = ((u32)region->offset) >> 12;
2348
2349         if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2350                 ib_umem_release(region);
2351                 return ERR_PTR(-EFAULT);
2352         }
2353         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2354
2355         switch (req.reg_type) {
2356                 case IWNES_MEMREG_TYPE_MEM:
2357                         pbl_depth = 0;
2358                         region_length = 0;
2359                         vpbl.pbl_vbase = NULL;
2360                         root_vpbl.pbl_vbase = NULL;
2361                         root_vpbl.pbl_pbase = 0;
2362
2363                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2364                         stag_key = (u8)next_stag_index;
2365
2366                         driver_key = next_stag_index & 0x70000000;
2367
2368                         next_stag_index >>= 8;
2369                         next_stag_index %= nesadapter->max_mr;
2370
2371                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2372                                         nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_USER_MR);
2373                         if (err) {
2374                                 ib_umem_release(region);
2375                                 return ERR_PTR(err);
2376                         }
2377
2378                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2379                         if (!nesmr) {
2380                                 ib_umem_release(region);
2381                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2382                                 return ERR_PTR(-ENOMEM);
2383                         }
2384                         nesmr->region = region;
2385
2386                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2387                                 if (sg_dma_address(sg) & ~PAGE_MASK) {
2388                                         ib_umem_release(region);
2389                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2390                                         nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2391                                                   (unsigned int) sg_dma_address(sg));
2392                                         ibmr = ERR_PTR(-EINVAL);
2393                                         kfree(nesmr);
2394                                         goto reg_user_mr_err;
2395                                 }
2396
2397                                 if (!sg_dma_len(sg)) {
2398                                         ib_umem_release(region);
2399                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2400                                                           stag_index);
2401                                         nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2402                                         ibmr = ERR_PTR(-EINVAL);
2403                                         kfree(nesmr);
2404                                         goto reg_user_mr_err;
2405                                 }
2406
2407                                 region_length += sg_dma_len(sg);
2408                                 chunk_pages = sg_dma_len(sg) >> 12;
2409                                 region_length -= skip_pages << 12;
2410                                 for (page_index = skip_pages; page_index < chunk_pages; page_index++) {
2411                                         skip_pages = 0;
2412                                         if ((page_count != 0) && (page_count<<12)-(region->offset&(4096-1)) >= region->length)
2413                                                 goto enough_pages;
2414                                         if ((page_count&0x01FF) == 0) {
2415                                                 if (page_count >= 1024 * 512) {
2416                                                         ib_umem_release(region);
2417                                                         nes_free_resource(nesadapter,
2418                                                                           nesadapter->allocated_mrs, stag_index);
2419                                                         kfree(nesmr);
2420                                                         ibmr = ERR_PTR(-E2BIG);
2421                                                         goto reg_user_mr_err;
2422                                                 }
2423                                                 if (root_pbl_index == 1) {
2424                                                         root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2425                                                                         8192, &root_vpbl.pbl_pbase);
2426                                                         nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2427                                                                   root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2428                                                         if (!root_vpbl.pbl_vbase) {
2429                                                                 ib_umem_release(region);
2430                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2431                                                                                     vpbl.pbl_pbase);
2432                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2433                                                                                   stag_index);
2434                                                                 kfree(nesmr);
2435                                                                 ibmr = ERR_PTR(-ENOMEM);
2436                                                                 goto reg_user_mr_err;
2437                                                         }
2438                                                         root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2439                                                                         GFP_KERNEL);
2440                                                         if (!root_vpbl.leaf_vpbl) {
2441                                                                 ib_umem_release(region);
2442                                                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2443                                                                                     root_vpbl.pbl_pbase);
2444                                                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2445                                                                                     vpbl.pbl_pbase);
2446                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2447                                                                                   stag_index);
2448                                                                 kfree(nesmr);
2449                                                                 ibmr = ERR_PTR(-ENOMEM);
2450                                                                 goto reg_user_mr_err;
2451                                                         }
2452                                                         root_vpbl.pbl_vbase[0].pa_low =
2453                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2454                                                         root_vpbl.pbl_vbase[0].pa_high =
2455                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2456                                                         root_vpbl.leaf_vpbl[0] = vpbl;
2457                                                 }
2458                                                 vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2459                                                                 &vpbl.pbl_pbase);
2460                                                 nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2461                                                           vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2462                                                 if (!vpbl.pbl_vbase) {
2463                                                         ib_umem_release(region);
2464                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2465                                                         ibmr = ERR_PTR(-ENOMEM);
2466                                                         kfree(nesmr);
2467                                                         goto reg_user_mr_err;
2468                                                 }
2469                                                 if (1 <= root_pbl_index) {
2470                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2471                                                                         cpu_to_le32((u32)vpbl.pbl_pbase);
2472                                                         root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2473                                                                         cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2474                                                         root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2475                                                 }
2476                                                 root_pbl_index++;
2477                                                 cur_pbl_index = 0;
2478                                         }
2479                                         if (single_page) {
2480                                                 if (page_count != 0) {
2481                                                         if ((last_dma_addr+4096) !=
2482                                                                         (sg_dma_address(sg)+
2483                                                                         (page_index*4096)))
2484                                                                 single_page = 0;
2485                                                         last_dma_addr = sg_dma_address(sg)+
2486                                                                         (page_index*4096);
2487                                                 } else {
2488                                                         first_dma_addr = sg_dma_address(sg)+
2489                                                                         (page_index*4096);
2490                                                         last_dma_addr = first_dma_addr;
2491                                                 }
2492                                         }
2493
2494                                         vpbl.pbl_vbase[cur_pbl_index].pa_low =
2495                                                         cpu_to_le32((u32)(sg_dma_address(sg)+
2496                                                         (page_index*4096)));
2497                                         vpbl.pbl_vbase[cur_pbl_index].pa_high =
2498                                                         cpu_to_le32((u32)((((u64)(sg_dma_address(sg)+
2499                                                         (page_index*4096))) >> 32)));
2500                                         cur_pbl_index++;
2501                                         page_count++;
2502                                 }
2503                         }
2504
2505                         enough_pages:
2506                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2507                                         " stag_key=0x%08x\n",
2508                                         stag_index, driver_key, stag_key);
2509                         stag = stag_index << 8;
2510                         stag |= driver_key;
2511                         stag += (u32)stag_key;
2512
2513                         iova_start = virt;
2514                         /* Make the leaf PBL the root if only one PBL */
2515                         if (root_pbl_index == 1) {
2516                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2517                         }
2518
2519                         if (single_page) {
2520                                 pbl_count = 0;
2521                         } else {
2522                                 pbl_count = root_pbl_index;
2523                                 first_dma_addr = 0;
2524                         }
2525                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2526                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2527                                         stag, (unsigned int)iova_start,
2528                                         (unsigned int)region_length, stag_index,
2529                                         (unsigned long long)region->length, pbl_count);
2530                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2531                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2532                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2533
2534                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2535
2536                         if (ret == 0) {
2537                                 nesmr->ibmr.rkey = stag;
2538                                 nesmr->ibmr.lkey = stag;
2539                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2540                                 ibmr = &nesmr->ibmr;
2541                         } else {
2542                                 ib_umem_release(region);
2543                                 kfree(nesmr);
2544                                 ibmr = ERR_PTR(-ENOMEM);
2545                         }
2546
2547                         reg_user_mr_err:
2548                         /* free the resources */
2549                         if (root_pbl_index == 1) {
2550                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2551                                                 vpbl.pbl_pbase);
2552                         } else {
2553                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2554                                         pci_free_consistent(nesdev->pcidev, 4096,
2555                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2556                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2557                                 }
2558                                 kfree(root_vpbl.leaf_vpbl);
2559                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2560                                                 root_vpbl.pbl_pbase);
2561                         }
2562
2563                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2564
2565                         return ibmr;
2566                 case IWNES_MEMREG_TYPE_QP:
2567                 case IWNES_MEMREG_TYPE_CQ:
2568                         if (!region->length) {
2569                                 nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n");
2570                                 ib_umem_release(region);
2571                                 return ERR_PTR(-EINVAL);
2572                         }
2573                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2574                         if (!nespbl) {
2575                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2576                                 ib_umem_release(region);
2577                                 return ERR_PTR(-ENOMEM);
2578                         }
2579                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2580                         if (!nesmr) {
2581                                 ib_umem_release(region);
2582                                 kfree(nespbl);
2583                                 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2584                                 return ERR_PTR(-ENOMEM);
2585                         }
2586                         nesmr->region = region;
2587                         nes_ucontext = to_nesucontext(pd->uobject->context);
2588                         pbl_depth = region->length >> 12;
2589                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2590                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2591                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2592                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2593                         } else {
2594                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2595                         }
2596
2597                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2598                                         nespbl->pbl_size, pbl_depth);
2599                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2600                                         &nespbl->pbl_pbase);
2601                         if (!pbl) {
2602                                 ib_umem_release(region);
2603                                 kfree(nesmr);
2604                                 kfree(nespbl);
2605                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2606                                 return ERR_PTR(-ENOMEM);
2607                         }
2608
2609                         nespbl->pbl_vbase = (u64 *)pbl;
2610                         nespbl->user_base = start;
2611                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2612                                         " pbl_vbase=%p user_base=0x%lx\n",
2613                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2614                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2615
2616                         for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
2617                                 chunk_pages = sg_dma_len(sg) >> 12;
2618                                 chunk_pages += (sg_dma_len(sg) & (4096-1)) ? 1 : 0;
2619                                 if (first_page) {
2620                                         nespbl->page = sg_page(sg);
2621                                         first_page = 0;
2622                                 }
2623
2624                                 for (page_index = 0; page_index < chunk_pages; page_index++) {
2625                                         ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2626                                                         (sg_dma_address(sg)+
2627                                                         (page_index*4096)));
2628                                         ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2629                                                         (sg_dma_address(sg)+
2630                                                         (page_index*4096)))>>32);
2631                                         nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2632                                                   (unsigned long long)*pbl,
2633                                                   le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2634                                         pbl++;
2635                                 }
2636                         }
2637
2638                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2639                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2640                         } else {
2641                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2642                         }
2643                         nesmr->ibmr.rkey = -1;
2644                         nesmr->ibmr.lkey = -1;
2645                         nesmr->mode = req.reg_type;
2646                         return &nesmr->ibmr;
2647         }
2648
2649         ib_umem_release(region);
2650         return ERR_PTR(-ENOSYS);
2651 }
2652
2653
2654 /**
2655  * nes_dereg_mr
2656  */
2657 static int nes_dereg_mr(struct ib_mr *ib_mr)
2658 {
2659         struct nes_mr *nesmr = to_nesmr(ib_mr);
2660         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2661         struct nes_device *nesdev = nesvnic->nesdev;
2662         struct nes_adapter *nesadapter = nesdev->nesadapter;
2663         struct nes_hw_cqp_wqe *cqp_wqe;
2664         struct nes_cqp_request *cqp_request;
2665         unsigned long flags;
2666         int ret;
2667         u16 major_code;
2668         u16 minor_code;
2669
2670         if (nesmr->region) {
2671                 ib_umem_release(nesmr->region);
2672         }
2673         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2674                 kfree(nesmr);
2675                 return 0;
2676         }
2677
2678         /* Deallocate the region with the adapter */
2679
2680         cqp_request = nes_get_cqp_request(nesdev);
2681         if (cqp_request == NULL) {
2682                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2683                 return -ENOMEM;
2684         }
2685         cqp_request->waiting = 1;
2686         cqp_wqe = &cqp_request->cqp_wqe;
2687
2688         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2689         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2690                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2691                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2692         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2693
2694         atomic_set(&cqp_request->refcount, 2);
2695         nes_post_cqp_request(nesdev, cqp_request);
2696
2697         /* Wait for CQP */
2698         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2699         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2700                         NES_EVENT_TIMEOUT);
2701         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2702                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2703                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2704
2705         major_code = cqp_request->major_code;
2706         minor_code = cqp_request->minor_code;
2707
2708         nes_put_cqp_request(nesdev, cqp_request);
2709
2710         if (!ret) {
2711                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2712                                 " ib_mr=%p, rkey = 0x%08X\n",
2713                                 ib_mr, ib_mr->rkey);
2714                 return -ETIME;
2715         } else if (major_code) {
2716                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2717                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2718                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2719                 return -EIO;
2720         }
2721
2722         if (nesmr->pbls_used != 0) {
2723                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2724                 if (nesmr->pbl_4k) {
2725                         nesadapter->free_4kpbl += nesmr->pbls_used;
2726                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2727                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2728                                         "exceeded the max(%u)\n",
2729                                         nesadapter->free_4kpbl,
2730                                         nesadapter->max_4kpbl);
2731                 } else {
2732                         nesadapter->free_256pbl += nesmr->pbls_used;
2733                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2734                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2735                                         "exceeded the max(%u)\n",
2736                                         nesadapter->free_256pbl,
2737                                         nesadapter->max_256pbl);
2738                 }
2739                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2740         }
2741         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2742                         (ib_mr->rkey & 0x0fffff00) >> 8);
2743
2744         kfree(nesmr);
2745
2746         return 0;
2747 }
2748
2749
2750 /**
2751  * show_rev
2752  */
2753 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2754                         char *buf)
2755 {
2756         struct nes_ib_device *nesibdev =
2757                         container_of(dev, struct nes_ib_device, ibdev.dev);
2758         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2759
2760         nes_debug(NES_DBG_INIT, "\n");
2761         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2762 }
2763
2764
2765 /**
2766  * show_fw_ver
2767  */
2768 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
2769                            char *buf)
2770 {
2771         struct nes_ib_device *nesibdev =
2772                         container_of(dev, struct nes_ib_device, ibdev.dev);
2773         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2774
2775         nes_debug(NES_DBG_INIT, "\n");
2776         return sprintf(buf, "%u.%u\n",
2777                 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
2778                 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
2779 }
2780
2781
2782 /**
2783  * show_hca
2784  */
2785 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2786                         char *buf)
2787 {
2788         nes_debug(NES_DBG_INIT, "\n");
2789         return sprintf(buf, "NES020\n");
2790 }
2791
2792
2793 /**
2794  * show_board
2795  */
2796 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2797                           char *buf)
2798 {
2799         nes_debug(NES_DBG_INIT, "\n");
2800         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2801 }
2802
2803
2804 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2805 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2806 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2807 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2808
2809 static struct device_attribute *nes_dev_attributes[] = {
2810         &dev_attr_hw_rev,
2811         &dev_attr_fw_ver,
2812         &dev_attr_hca_type,
2813         &dev_attr_board_id
2814 };
2815
2816
2817 /**
2818  * nes_query_qp
2819  */
2820 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2821                 int attr_mask, struct ib_qp_init_attr *init_attr)
2822 {
2823         struct nes_qp *nesqp = to_nesqp(ibqp);
2824
2825         nes_debug(NES_DBG_QP, "\n");
2826
2827         attr->qp_access_flags = 0;
2828         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2829         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2830         attr->cap.max_recv_sge = 1;
2831         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2832                 attr->cap.max_inline_data = 0;
2833         else
2834                 attr->cap.max_inline_data = 64;
2835
2836         init_attr->event_handler = nesqp->ibqp.event_handler;
2837         init_attr->qp_context = nesqp->ibqp.qp_context;
2838         init_attr->send_cq = nesqp->ibqp.send_cq;
2839         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2840         init_attr->srq = nesqp->ibqp.srq;
2841         init_attr->cap = attr->cap;
2842
2843         return 0;
2844 }
2845
2846
2847 /**
2848  * nes_hw_modify_qp
2849  */
2850 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2851                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2852 {
2853         struct nes_hw_cqp_wqe *cqp_wqe;
2854         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2855         /* struct iw_cm_event cm_event; */
2856         struct nes_cqp_request *cqp_request;
2857         int ret;
2858         u16 major_code;
2859
2860         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2861                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2862
2863         cqp_request = nes_get_cqp_request(nesdev);
2864         if (cqp_request == NULL) {
2865                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2866                 return -ENOMEM;
2867         }
2868         if (wait_completion) {
2869                 cqp_request->waiting = 1;
2870         } else {
2871                 cqp_request->waiting = 0;
2872         }
2873         cqp_wqe = &cqp_request->cqp_wqe;
2874
2875         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2876                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2877         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2878                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2879         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2880         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2881         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2882
2883         /* If sending a terminate message, fill in the length (in words) */
2884         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2885             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2886                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2887                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2888         }
2889
2890         atomic_set(&cqp_request->refcount, 2);
2891         nes_post_cqp_request(nesdev, cqp_request);
2892
2893         /* Wait for CQP */
2894         if (wait_completion) {
2895                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2896                                 nesqp->hwqp.qp_id); */
2897                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2898                                 NES_EVENT_TIMEOUT);
2899                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2900                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2901                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2902                 major_code = cqp_request->major_code;
2903                 if (major_code) {
2904                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2905                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2906                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2907                                         cqp_request->minor_code, next_iwarp_state);
2908                 }
2909
2910                 nes_put_cqp_request(nesdev, cqp_request);
2911
2912                 if (!ret)
2913                         return -ETIME;
2914                 else if (major_code)
2915                         return -EIO;
2916                 else
2917                         return 0;
2918         } else {
2919                 return 0;
2920         }
2921 }
2922
2923
2924 /**
2925  * nes_modify_qp
2926  */
2927 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2928                 int attr_mask, struct ib_udata *udata)
2929 {
2930         struct nes_qp *nesqp = to_nesqp(ibqp);
2931         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2932         struct nes_device *nesdev = nesvnic->nesdev;
2933         /* u32 cqp_head; */
2934         /* u32 counter; */
2935         u32 next_iwarp_state = 0;
2936         int err;
2937         unsigned long qplockflags;
2938         int ret;
2939         u16 original_last_aeq;
2940         u8 issue_modify_qp = 0;
2941         u8 dont_wait = 0;
2942
2943         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2944                         " iwarp_state=0x%X, refcount=%d\n",
2945                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2946                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2947
2948         spin_lock_irqsave(&nesqp->lock, qplockflags);
2949
2950         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2951                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2952                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2953                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2954
2955         if (attr_mask & IB_QP_STATE) {
2956                 switch (attr->qp_state) {
2957                         case IB_QPS_INIT:
2958                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2959                                                 nesqp->hwqp.qp_id);
2960                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2961                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2962                                         return -EINVAL;
2963                                 }
2964                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2965                                 issue_modify_qp = 1;
2966                                 break;
2967                         case IB_QPS_RTR:
2968                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2969                                                 nesqp->hwqp.qp_id);
2970                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2971                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2972                                         return -EINVAL;
2973                                 }
2974                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2975                                 issue_modify_qp = 1;
2976                                 break;
2977                         case IB_QPS_RTS:
2978                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2979                                                 nesqp->hwqp.qp_id);
2980                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2981                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2982                                         return -EINVAL;
2983                                 }
2984                                 if (nesqp->cm_id == NULL) {
2985                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2986                                                         nesqp->hwqp.qp_id );
2987                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2988                                         return -EINVAL;
2989                                 }
2990                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2991                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2992                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2993                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2994                                 issue_modify_qp = 1;
2995                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2996                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2997                                 nesqp->hte_added = 1;
2998                                 break;
2999                         case IB_QPS_SQD:
3000                                 issue_modify_qp = 1;
3001                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
3002                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
3003                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
3004                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3005                                         return 0;
3006                                 } else {
3007                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
3008                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3009                                                                 " ignored due to current iWARP state\n",
3010                                                                 nesqp->hwqp.qp_id);
3011                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3012                                                 return -EINVAL;
3013                                         }
3014                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
3015                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3016                                                                 " already done based on hw state.\n",
3017                                                                 nesqp->hwqp.qp_id);
3018                                                 issue_modify_qp = 0;
3019                                         }
3020                                         switch (nesqp->hw_iwarp_state) {
3021                                                 case NES_AEQE_IWARP_STATE_CLOSING:
3022                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3023                                                         break;
3024                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
3025                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3026                                                         break;
3027                                                 case NES_AEQE_IWARP_STATE_ERROR:
3028                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3029                                                         break;
3030                                                 default:
3031                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3032                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
3033                                                         break;
3034                                         }
3035                                 }
3036                                 break;
3037                         case IB_QPS_SQE:
3038                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
3039                                                 nesqp->hwqp.qp_id);
3040                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
3041                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3042                                         return -EINVAL;
3043                                 }
3044                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3045                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3046                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
3047                                 issue_modify_qp = 1;
3048                                 break;
3049                         case IB_QPS_ERR:
3050                         case IB_QPS_RESET:
3051                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
3052                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3053                                         return -EINVAL;
3054                                 }
3055                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
3056                                                 nesqp->hwqp.qp_id);
3057                                 if (nesqp->term_flags)
3058                                         del_timer(&nesqp->terminate_timer);
3059
3060                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3061                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3062                                         if (nesqp->hte_added) {
3063                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
3064                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
3065                                                 nesqp->hte_added = 0;
3066                                         }
3067                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
3068                                                 (nesdev->iw_status) &&
3069                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
3070                                         next_iwarp_state |= NES_CQP_QP_RESET;
3071                                 } else {
3072                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
3073                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
3074                                         dont_wait = 1;
3075                                 }
3076                                 issue_modify_qp = 1;
3077                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
3078                                 break;
3079                         default:
3080                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3081                                 return -EINVAL;
3082                                 break;
3083                 }
3084
3085                 nesqp->ibqp_state = attr->qp_state;
3086                 nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3087                 nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3088                                 nesqp->iwarp_state);
3089         }
3090
3091         if (attr_mask & IB_QP_ACCESS_FLAGS) {
3092                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
3093                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3094                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3095                         issue_modify_qp = 1;
3096                 }
3097                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
3098                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
3099                         issue_modify_qp = 1;
3100                 }
3101                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
3102                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
3103                         issue_modify_qp = 1;
3104                 }
3105                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
3106                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
3107                         issue_modify_qp = 1;
3108                 }
3109
3110                 if (nesqp->user_mode) {
3111                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3112                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3113                         issue_modify_qp = 1;
3114                 }
3115         }
3116
3117         original_last_aeq = nesqp->last_aeq;
3118         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3119
3120         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
3121
3122         ret = 0;
3123
3124
3125         if (issue_modify_qp) {
3126                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
3127                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
3128                 if (ret)
3129                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
3130                                         " failed for QP%u.\n",
3131                                         next_iwarp_state, nesqp->hwqp.qp_id);
3132
3133         }
3134
3135         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
3136                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
3137                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3138                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3139                                 original_last_aeq, nesqp->last_aeq);
3140                 if (!ret || original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) {
3141                         if (dont_wait) {
3142                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
3143                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
3144                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3145                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3146                                                         original_last_aeq, nesqp->last_aeq);
3147                                         /* this one is for the cm_disconnect thread */
3148                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
3149                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
3150                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
3151                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3152                                         nes_cm_disconn(nesqp);
3153                                 } else {
3154                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
3155                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3156                                 }
3157                         } else {
3158                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
3159                                 if (nesqp->cm_id) {
3160                                         /* These two are for the timer thread */
3161                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3162                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
3163                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3164                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
3165                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
3166                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3167                                                                 original_last_aeq, nesqp->last_aeq);
3168                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3169                                         }
3170                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3171                                 } else {
3172                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3173                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3174                                                         " need ae to finish up, original_last_aeq = 0x%04X."
3175                                                         " last_aeq = 0x%04X.\n",
3176                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3177                                                         original_last_aeq, nesqp->last_aeq);
3178                                 }
3179                         }
3180                 } else {
3181                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3182                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3183                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3184                                         original_last_aeq, nesqp->last_aeq);
3185                 }
3186         } else {
3187                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3188                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3189                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3190                                 original_last_aeq, nesqp->last_aeq);
3191         }
3192
3193         err = 0;
3194
3195         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3196                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3197
3198         return err;
3199 }
3200
3201
3202 /**
3203  * nes_muticast_attach
3204  */
3205 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3206 {
3207         nes_debug(NES_DBG_INIT, "\n");
3208         return -ENOSYS;
3209 }
3210
3211
3212 /**
3213  * nes_multicast_detach
3214  */
3215 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3216 {
3217         nes_debug(NES_DBG_INIT, "\n");
3218         return -ENOSYS;
3219 }
3220
3221
3222 /**
3223  * nes_process_mad
3224  */
3225 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3226                 u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
3227                 struct ib_mad *in_mad, struct ib_mad *out_mad)
3228 {
3229         nes_debug(NES_DBG_INIT, "\n");
3230         return -ENOSYS;
3231 }
3232
3233 static inline void
3234 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3235 {
3236         int sge_index;
3237         int total_payload_length = 0;
3238         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3239                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3240                         ib_wr->sg_list[sge_index].addr);
3241                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3242                         ib_wr->sg_list[sge_index].length);
3243                 if (uselkey)
3244                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3245                                                 (ib_wr->sg_list[sge_index].lkey));
3246                 else
3247                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3248
3249                 total_payload_length += ib_wr->sg_list[sge_index].length;
3250         }
3251         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3252                         total_payload_length);
3253         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3254                                 total_payload_length);
3255 }
3256
3257 /**
3258  * nes_post_send
3259  */
3260 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3261                 struct ib_send_wr **bad_wr)
3262 {
3263         u64 u64temp;
3264         unsigned long flags = 0;
3265         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3266         struct nes_device *nesdev = nesvnic->nesdev;
3267         struct nes_qp *nesqp = to_nesqp(ibqp);
3268         struct nes_hw_qp_wqe *wqe;
3269         int err = 0;
3270         u32 qsize = nesqp->hwqp.sq_size;
3271         u32 head;
3272         u32 wqe_misc = 0;
3273         u32 wqe_count = 0;
3274         u32 counter;
3275
3276         if (nesqp->ibqp_state > IB_QPS_RTS) {
3277                 err = -EINVAL;
3278                 goto out;
3279         }
3280
3281         spin_lock_irqsave(&nesqp->lock, flags);
3282
3283         head = nesqp->hwqp.sq_head;
3284
3285         while (ib_wr) {
3286                 /* Check for QP error */
3287                 if (nesqp->term_flags) {
3288                         err = -EINVAL;
3289                         break;
3290                 }
3291
3292                 /* Check for SQ overflow */
3293                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3294                         err = -ENOMEM;
3295                         break;
3296                 }
3297
3298                 wqe = &nesqp->hwqp.sq_vbase[head];
3299                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3300                                 nesqp->hwqp.qp_id, wqe, head); */
3301                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3302                 u64temp = (u64)(ib_wr->wr_id);
3303                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3304                                         u64temp);
3305                 switch (ib_wr->opcode) {
3306                 case IB_WR_SEND:
3307                 case IB_WR_SEND_WITH_INV:
3308                         if (IB_WR_SEND == ib_wr->opcode) {
3309                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3310                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3311                                 else
3312                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3313                         } else {
3314                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3315                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3316                                 else
3317                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3318
3319                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3320                                                     ib_wr->ex.invalidate_rkey);
3321                         }
3322
3323                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3324                                 err = -EINVAL;
3325                                 break;
3326                         }
3327
3328                         if (ib_wr->send_flags & IB_SEND_FENCE)
3329                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3330
3331                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3332                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3333                              (ib_wr->sg_list[0].length <= 64)) {
3334                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3335                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3336                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3337                                                     ib_wr->sg_list[0].length);
3338                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3339                         } else {
3340                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3341                         }
3342
3343                         break;
3344                 case IB_WR_RDMA_WRITE:
3345                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3346                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3347                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3348                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3349                                 err = -EINVAL;
3350                                 break;
3351                         }
3352
3353                         if (ib_wr->send_flags & IB_SEND_FENCE)
3354                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3355
3356                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3357                                             ib_wr->wr.rdma.rkey);
3358                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3359                                             ib_wr->wr.rdma.remote_addr);
3360
3361                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3362                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3363                              (ib_wr->sg_list[0].length <= 64)) {
3364                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3365                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3366                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3367                                                     ib_wr->sg_list[0].length);
3368                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3369                         } else {
3370                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3371                         }
3372
3373                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3374                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3375                         break;
3376                 case IB_WR_RDMA_READ:
3377                 case IB_WR_RDMA_READ_WITH_INV:
3378                         /* iWARP only supports 1 sge for RDMA reads */
3379                         if (ib_wr->num_sge > 1) {
3380                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3381                                           ib_wr->num_sge);
3382                                 err = -EINVAL;
3383                                 break;
3384                         }
3385                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3386                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3387                         } else {
3388                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3389                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3390                                                     ib_wr->ex.invalidate_rkey);
3391                         }
3392
3393                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3394                                             ib_wr->wr.rdma.remote_addr);
3395                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3396                                             ib_wr->wr.rdma.rkey);
3397                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3398                                             ib_wr->sg_list->length);
3399                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3400                                             ib_wr->sg_list->addr);
3401                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3402                                             ib_wr->sg_list->lkey);
3403                         break;
3404                 case IB_WR_LOCAL_INV:
3405                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3406                         set_wqe_32bit_value(wqe->wqe_words,
3407                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3408                                             ib_wr->ex.invalidate_rkey);
3409                         break;
3410                 case IB_WR_FAST_REG_MR:
3411                 {
3412                         int i;
3413                         int flags = ib_wr->wr.fast_reg.access_flags;
3414                         struct nes_ib_fast_reg_page_list *pnesfrpl =
3415                                 container_of(ib_wr->wr.fast_reg.page_list,
3416                                              struct nes_ib_fast_reg_page_list,
3417                                              ibfrpl);
3418                         u64 *src_page_list = pnesfrpl->ibfrpl.page_list;
3419                         u64 *dst_page_list = pnesfrpl->nes_wqe_pbl.kva;
3420
3421                         if (ib_wr->wr.fast_reg.page_list_len >
3422                             (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3423                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3424                                 err = -EINVAL;
3425                                 break;
3426                         }
3427                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3428                         set_wqe_64bit_value(wqe->wqe_words,
3429                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3430                                             ib_wr->wr.fast_reg.iova_start);
3431                         set_wqe_32bit_value(wqe->wqe_words,
3432                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3433                                             ib_wr->wr.fast_reg.length);
3434                         set_wqe_32bit_value(wqe->wqe_words,
3435                                             NES_IWARP_SQ_FMR_WQE_LENGTH_HIGH_IDX, 0);
3436                         set_wqe_32bit_value(wqe->wqe_words,
3437                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3438                                             ib_wr->wr.fast_reg.rkey);
3439                         /* Set page size: */
3440                         if (ib_wr->wr.fast_reg.page_shift == 12) {
3441                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3442                         } else if (ib_wr->wr.fast_reg.page_shift == 21) {
3443                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3444                         } else {
3445                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3446                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3447                                 err = -EINVAL;
3448                                 break;
3449                         }
3450                         /* Set access_flags */
3451                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3452                         if (flags & IB_ACCESS_LOCAL_WRITE)
3453                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3454
3455                         if (flags & IB_ACCESS_REMOTE_WRITE)
3456                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3457
3458                         if (flags & IB_ACCESS_REMOTE_READ)
3459                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3460
3461                         if (flags & IB_ACCESS_MW_BIND)
3462                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3463
3464                         /* Fill in PBL info: */
3465                         if (ib_wr->wr.fast_reg.page_list_len >
3466                             pnesfrpl->ibfrpl.max_page_list_len) {
3467                                 nes_debug(NES_DBG_IW_TX, "Invalid page list length,"
3468                                           " ib_wr=%p, value=%u, max=%u\n",
3469                                           ib_wr, ib_wr->wr.fast_reg.page_list_len,
3470                                           pnesfrpl->ibfrpl.max_page_list_len);
3471                                 err = -EINVAL;
3472                                 break;
3473                         }
3474
3475                         set_wqe_64bit_value(wqe->wqe_words,
3476                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3477                                             pnesfrpl->nes_wqe_pbl.paddr);
3478
3479                         set_wqe_32bit_value(wqe->wqe_words,
3480                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3481                                             ib_wr->wr.fast_reg.page_list_len * 8);
3482
3483                         for (i = 0; i < ib_wr->wr.fast_reg.page_list_len; i++)
3484                                 dst_page_list[i] = cpu_to_le64(src_page_list[i]);
3485
3486                         nes_debug(NES_DBG_IW_TX, "SQ_FMR: iova_start: %llx, "
3487                                   "length: %d, rkey: %0x, pgl_paddr: %llx, "
3488                                   "page_list_len: %u, wqe_misc: %x\n",
3489                                   (unsigned long long) ib_wr->wr.fast_reg.iova_start,
3490                                   ib_wr->wr.fast_reg.length,
3491                                   ib_wr->wr.fast_reg.rkey,
3492                                   (unsigned long long) pnesfrpl->nes_wqe_pbl.paddr,
3493                                   ib_wr->wr.fast_reg.page_list_len,
3494                                   wqe_misc);
3495                         break;
3496                 }
3497                 default:
3498                         /* error */
3499                         err = -EINVAL;
3500                         break;
3501                 }
3502
3503                 if (err)
3504                         break;
3505
3506                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3507                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3508
3509                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3510
3511                 ib_wr = ib_wr->next;
3512                 head++;
3513                 wqe_count++;
3514                 if (head >= qsize)
3515                         head = 0;
3516
3517         }
3518
3519         nesqp->hwqp.sq_head = head;
3520         barrier();
3521         while (wqe_count) {
3522                 counter = min(wqe_count, ((u32)255));
3523                 wqe_count -= counter;
3524                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3525                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3526         }
3527
3528         spin_unlock_irqrestore(&nesqp->lock, flags);
3529
3530 out:
3531         if (err)
3532                 *bad_wr = ib_wr;
3533         return err;
3534 }
3535
3536
3537 /**
3538  * nes_post_recv
3539  */
3540 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3541                 struct ib_recv_wr **bad_wr)
3542 {
3543         u64 u64temp;
3544         unsigned long flags = 0;
3545         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3546         struct nes_device *nesdev = nesvnic->nesdev;
3547         struct nes_qp *nesqp = to_nesqp(ibqp);
3548         struct nes_hw_qp_wqe *wqe;
3549         int err = 0;
3550         int sge_index;
3551         u32 qsize = nesqp->hwqp.rq_size;
3552         u32 head;
3553         u32 wqe_count = 0;
3554         u32 counter;
3555         u32 total_payload_length;
3556
3557         if (nesqp->ibqp_state > IB_QPS_RTS) {
3558                 err = -EINVAL;
3559                 goto out;
3560         }
3561
3562         spin_lock_irqsave(&nesqp->lock, flags);
3563
3564         head = nesqp->hwqp.rq_head;
3565
3566         while (ib_wr) {
3567                 /* Check for QP error */
3568                 if (nesqp->term_flags) {
3569                         err = -EINVAL;
3570                         break;
3571                 }
3572
3573                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3574                         err = -EINVAL;
3575                         break;
3576                 }
3577                 /* Check for RQ overflow */
3578                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3579                         err = -ENOMEM;
3580                         break;
3581                 }
3582
3583                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3584                 wqe = &nesqp->hwqp.rq_vbase[head];
3585
3586                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3587                                 nesqp->hwqp.qp_id, wqe, head); */
3588                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3589                 u64temp = (u64)(ib_wr->wr_id);
3590                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3591                                         u64temp);
3592                 total_payload_length = 0;
3593                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3594                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3595                                         ib_wr->sg_list[sge_index].addr);
3596                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3597                                         ib_wr->sg_list[sge_index].length);
3598                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3599                                         ib_wr->sg_list[sge_index].lkey);
3600
3601                         total_payload_length += ib_wr->sg_list[sge_index].length;
3602                 }
3603                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3604                                         total_payload_length);
3605
3606                 ib_wr = ib_wr->next;
3607                 head++;
3608                 wqe_count++;
3609                 if (head >= qsize)
3610                         head = 0;
3611         }
3612
3613         nesqp->hwqp.rq_head = head;
3614         barrier();
3615         while (wqe_count) {
3616                 counter = min(wqe_count, ((u32)255));
3617                 wqe_count -= counter;
3618                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3619         }
3620
3621         spin_unlock_irqrestore(&nesqp->lock, flags);
3622
3623 out:
3624         if (err)
3625                 *bad_wr = ib_wr;
3626         return err;
3627 }
3628
3629
3630 /**
3631  * nes_poll_cq
3632  */
3633 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3634 {
3635         u64 u64temp;
3636         u64 wrid;
3637         unsigned long flags = 0;
3638         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3639         struct nes_device *nesdev = nesvnic->nesdev;
3640         struct nes_cq *nescq = to_nescq(ibcq);
3641         struct nes_qp *nesqp;
3642         struct nes_hw_cqe cqe;
3643         u32 head;
3644         u32 wq_tail = 0;
3645         u32 cq_size;
3646         u32 cqe_count = 0;
3647         u32 wqe_index;
3648         u32 u32temp;
3649         u32 move_cq_head = 1;
3650         u32 err_code;
3651
3652         nes_debug(NES_DBG_CQ, "\n");
3653
3654         spin_lock_irqsave(&nescq->lock, flags);
3655
3656         head = nescq->hw_cq.cq_head;
3657         cq_size = nescq->hw_cq.cq_size;
3658
3659         while (cqe_count < num_entries) {
3660                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3661                                 NES_CQE_VALID) == 0)
3662                         break;
3663
3664                 /*
3665                  * Make sure we read CQ entry contents *after*
3666                  * we've checked the valid bit.
3667                  */
3668                 rmb();
3669
3670                 cqe = nescq->hw_cq.cq_vbase[head];
3671                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3672                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3673                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3674                 /* parse CQE, get completion context from WQE (either rq or sq) */
3675                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3676                                 ((u64)u32temp);
3677
3678                 if (u64temp) {
3679                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3680                         memset(entry, 0, sizeof *entry);
3681                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3682                                 entry->status = IB_WC_SUCCESS;
3683                         } else {
3684                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3685                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3686                                         entry->status = err_code & 0x0000ffff;
3687
3688                                         /* The rest of the cqe's will be marked as flushed */
3689                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3690                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3691                                                             NES_IWARP_CQE_MINOR_FLUSH);
3692                                 } else
3693                                         entry->status = IB_WC_WR_FLUSH_ERR;
3694                         }
3695
3696                         entry->qp = &nesqp->ibqp;
3697                         entry->src_qp = nesqp->hwqp.qp_id;
3698
3699                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3700                                 if (nesqp->skip_lsmm) {
3701                                         nesqp->skip_lsmm = 0;
3702                                         nesqp->hwqp.sq_tail++;
3703                                 }
3704
3705                                 /* Working on a SQ Completion*/
3706                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3707                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3708                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3709                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3710                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3711                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3712
3713                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3714                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3715                                         case NES_IWARP_SQ_OP_RDMAW:
3716                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3717                                                 entry->opcode = IB_WC_RDMA_WRITE;
3718                                                 break;
3719                                         case NES_IWARP_SQ_OP_RDMAR:
3720                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3721                                                 entry->opcode = IB_WC_RDMA_READ;
3722                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3723                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3724                                                 break;
3725                                         case NES_IWARP_SQ_OP_SENDINV:
3726                                         case NES_IWARP_SQ_OP_SENDSEINV:
3727                                         case NES_IWARP_SQ_OP_SEND:
3728                                         case NES_IWARP_SQ_OP_SENDSE:
3729                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3730                                                 entry->opcode = IB_WC_SEND;
3731                                                 break;
3732                                         case NES_IWARP_SQ_OP_LOCINV:
3733                                                 entry->opcode = IB_WC_LOCAL_INV;
3734                                                 break;
3735                                         case NES_IWARP_SQ_OP_FAST_REG:
3736                                                 entry->opcode = IB_WC_FAST_REG_MR;
3737                                                 break;
3738                                 }
3739
3740                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3741                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3742                                         move_cq_head = 0;
3743                                         wq_tail = nesqp->hwqp.sq_tail;
3744                                 }
3745                         } else {
3746                                 /* Working on a RQ Completion*/
3747                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3748                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3749                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3750                                         entry->opcode = IB_WC_RECV;
3751
3752                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3753                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3754                                         move_cq_head = 0;
3755                                         wq_tail = nesqp->hwqp.rq_tail;
3756                                 }
3757                         }
3758
3759                         entry->wr_id = wrid;
3760                         entry++;
3761                         cqe_count++;
3762                 }
3763
3764                 if (move_cq_head) {
3765                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3766                         if (++head >= cq_size)
3767                                 head = 0;
3768                         nescq->polled_completions++;
3769
3770                         if ((nescq->polled_completions > (cq_size / 2)) ||
3771                                         (nescq->polled_completions == 255)) {
3772                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3773                                         " are pending %u of %u.\n",
3774                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3775                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3776                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3777                                 nescq->polled_completions = 0;
3778                         }
3779                 } else {
3780                         /* Update the wqe index and set status to flush */
3781                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3782                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3783                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3784                                 cpu_to_le32(wqe_index);
3785                         move_cq_head = 1; /* ready for next pass */
3786                 }
3787         }
3788
3789         if (nescq->polled_completions) {
3790                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3791                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3792                 nescq->polled_completions = 0;
3793         }
3794
3795         nescq->hw_cq.cq_head = head;
3796         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3797                         cqe_count, nescq->hw_cq.cq_number);
3798
3799         spin_unlock_irqrestore(&nescq->lock, flags);
3800
3801         return cqe_count;
3802 }
3803
3804
3805 /**
3806  * nes_req_notify_cq
3807  */
3808 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3809                 {
3810         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3811         struct nes_device *nesdev = nesvnic->nesdev;
3812         struct nes_cq *nescq = to_nescq(ibcq);
3813         u32 cq_arm;
3814
3815         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3816                         nescq->hw_cq.cq_number);
3817
3818         cq_arm = nescq->hw_cq.cq_number;
3819         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3820                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3821         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3822                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3823         else
3824                 return -EINVAL;
3825
3826         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3827         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3828
3829         return 0;
3830 }
3831
3832
3833 /**
3834  * nes_init_ofa_device
3835  */
3836 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3837 {
3838         struct nes_ib_device *nesibdev;
3839         struct nes_vnic *nesvnic = netdev_priv(netdev);
3840         struct nes_device *nesdev = nesvnic->nesdev;
3841
3842         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3843         if (nesibdev == NULL) {
3844                 return NULL;
3845         }
3846         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3847         nesibdev->ibdev.owner = THIS_MODULE;
3848
3849         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3850         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3851         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3852
3853         nesibdev->ibdev.uverbs_cmd_mask =
3854                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3855                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3856                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3857                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3858                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3859                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3860                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3861                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3862                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3863                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3864                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3865                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3866                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3867                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3868                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3869                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3870                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3871                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3872                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3873                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3874                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3875                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3876
3877         nesibdev->ibdev.phys_port_cnt = 1;
3878         nesibdev->ibdev.num_comp_vectors = 1;
3879         nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3880         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3881         nesibdev->ibdev.query_device = nes_query_device;
3882         nesibdev->ibdev.query_port = nes_query_port;
3883         nesibdev->ibdev.query_pkey = nes_query_pkey;
3884         nesibdev->ibdev.query_gid = nes_query_gid;
3885         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3886         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3887         nesibdev->ibdev.mmap = nes_mmap;
3888         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3889         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3890         nesibdev->ibdev.create_ah = nes_create_ah;
3891         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3892         nesibdev->ibdev.create_qp = nes_create_qp;
3893         nesibdev->ibdev.modify_qp = nes_modify_qp;
3894         nesibdev->ibdev.query_qp = nes_query_qp;
3895         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3896         nesibdev->ibdev.create_cq = nes_create_cq;
3897         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3898         nesibdev->ibdev.poll_cq = nes_poll_cq;
3899         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3900         nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
3901         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3902         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3903         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3904         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3905         nesibdev->ibdev.bind_mw = nes_bind_mw;
3906
3907         nesibdev->ibdev.alloc_fast_reg_mr = nes_alloc_fast_reg_mr;
3908         nesibdev->ibdev.alloc_fast_reg_page_list = nes_alloc_fast_reg_page_list;
3909         nesibdev->ibdev.free_fast_reg_page_list = nes_free_fast_reg_page_list;
3910
3911         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3912         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3913         nesibdev->ibdev.process_mad = nes_process_mad;
3914
3915         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3916         nesibdev->ibdev.post_send = nes_post_send;
3917         nesibdev->ibdev.post_recv = nes_post_recv;
3918
3919         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3920         if (nesibdev->ibdev.iwcm == NULL) {
3921                 ib_dealloc_device(&nesibdev->ibdev);
3922                 return NULL;
3923         }
3924         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3925         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3926         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3927         nesibdev->ibdev.iwcm->connect = nes_connect;
3928         nesibdev->ibdev.iwcm->accept = nes_accept;
3929         nesibdev->ibdev.iwcm->reject = nes_reject;
3930         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3931         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3932
3933         return nesibdev;
3934 }
3935
3936
3937 /**
3938  * nes_handle_delayed_event
3939  */
3940 static void nes_handle_delayed_event(unsigned long data)
3941 {
3942         struct nes_vnic *nesvnic = (void *) data;
3943
3944         if (nesvnic->delayed_event != nesvnic->last_dispatched_event) {
3945                 struct ib_event event;
3946
3947                 event.device = &nesvnic->nesibdev->ibdev;
3948                 if (!event.device)
3949                         goto stop_timer;
3950                 event.event = nesvnic->delayed_event;
3951                 event.element.port_num = nesvnic->logical_port + 1;
3952                 ib_dispatch_event(&event);
3953         }
3954
3955 stop_timer:
3956         nesvnic->event_timer.function = NULL;
3957 }
3958
3959
3960 void  nes_port_ibevent(struct nes_vnic *nesvnic)
3961 {
3962         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
3963         struct nes_device *nesdev = nesvnic->nesdev;
3964         struct ib_event event;
3965         event.device = &nesibdev->ibdev;
3966         event.element.port_num = nesvnic->logical_port + 1;
3967         event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
3968
3969         if (!nesvnic->event_timer.function) {
3970                 ib_dispatch_event(&event);
3971                 nesvnic->last_dispatched_event = event.event;
3972                 nesvnic->event_timer.function = nes_handle_delayed_event;
3973                 nesvnic->event_timer.data = (unsigned long) nesvnic;
3974                 nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY;
3975                 add_timer(&nesvnic->event_timer);
3976         } else {
3977                 mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY);
3978         }
3979         nesvnic->delayed_event = event.event;
3980 }
3981
3982
3983 /**
3984  * nes_destroy_ofa_device
3985  */
3986 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3987 {
3988         if (nesibdev == NULL)
3989                 return;
3990
3991         nes_unregister_ofa_device(nesibdev);
3992
3993         kfree(nesibdev->ibdev.iwcm);
3994         ib_dealloc_device(&nesibdev->ibdev);
3995 }
3996
3997
3998 /**
3999  * nes_register_ofa_device
4000  */
4001 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
4002 {
4003         struct nes_vnic *nesvnic = nesibdev->nesvnic;
4004         struct nes_device *nesdev = nesvnic->nesdev;
4005         struct nes_adapter *nesadapter = nesdev->nesadapter;
4006         int i, ret;
4007
4008         ret = ib_register_device(&nesvnic->nesibdev->ibdev, NULL);
4009         if (ret) {
4010                 return ret;
4011         }
4012
4013         /* Get the resources allocated to this device */
4014         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
4015         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
4016         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
4017         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
4018
4019         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4020                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4021                 if (ret) {
4022                         while (i > 0) {
4023                                 i--;
4024                                 device_remove_file(&nesibdev->ibdev.dev,
4025                                                    nes_dev_attributes[i]);
4026                         }
4027                         ib_unregister_device(&nesibdev->ibdev);
4028                         return ret;
4029                 }
4030         }
4031
4032         nesvnic->of_device_registered = 1;
4033
4034         return 0;
4035 }
4036
4037
4038 /**
4039  * nes_unregister_ofa_device
4040  */
4041 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
4042 {
4043         struct nes_vnic *nesvnic = nesibdev->nesvnic;
4044         int i;
4045
4046         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4047                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4048         }
4049
4050         if (nesvnic->of_device_registered) {
4051                 ib_unregister_device(&nesibdev->ibdev);
4052         }
4053
4054         nesvnic->of_device_registered = 0;
4055 }