drivers/infiniband/hw/nes/nes_verbs.c

   1 /*
   2  * Copyright (c) 2006 - 2009 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/random.h>
  37 #include <linux/highmem.h>
  38 #include <linux/slab.h>
  39 #include <asm/byteorder.h>
  40
  41 #include <rdma/ib_verbs.h>
  42 #include <rdma/iw_cm.h>
  43 #include <rdma/ib_user_verbs.h>
  44
  45 #include "nes.h"
  46
  47 #include <rdma/ib_umem.h>
  48
  49 atomic_t mod_qp_timouts;
  50 atomic_t qps_created;
  51 atomic_t sw_qps_destroyed;
  52
  53 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
  54
  55 /**
  56  * nes_alloc_mw
  57  */
  58 static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd) {
  59         struct nes_pd *nespd = to_nespd(ibpd);
  60         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
  61         struct nes_device *nesdev = nesvnic->nesdev;
  62         struct nes_adapter *nesadapter = nesdev->nesadapter;
  63         struct nes_cqp_request *cqp_request;
  64         struct nes_mr *nesmr;
  65         struct ib_mw *ibmw;
  66         struct nes_hw_cqp_wqe *cqp_wqe;
  67         int ret;
  68         u32 stag;
  69         u32 stag_index = 0;
  70         u32 next_stag_index = 0;
  71         u32 driver_key = 0;
  72         u8 stag_key = 0;
  73
  74         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
  75         stag_key = (u8)next_stag_index;
  76
  77         driver_key = 0;
  78
  79         next_stag_index >>= 8;
  80         next_stag_index %= nesadapter->max_mr;
  81
  82         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
  83                         nesadapter->max_mr, &stag_index, &next_stag_index);
  84         if (ret) {
  85                 return ERR_PTR(ret);
  86         }
  87
  88         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
  89         if (!nesmr) {
  90                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
  91                 return ERR_PTR(-ENOMEM);
  92         }
  93
  94         stag = stag_index << 8;
  95         stag |= driver_key;
  96         stag += (u32)stag_key;
  97
  98         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
  99                         stag, stag_index);
 100
 101         /* Register the region with the adapter */
 102         cqp_request = nes_get_cqp_request(nesdev);
 103         if (cqp_request == NULL) {
 104                 kfree(nesmr);
 105                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 106                 return ERR_PTR(-ENOMEM);
 107         }
 108
 109         cqp_request->waiting = 1;
 110         cqp_wqe = &cqp_request->cqp_wqe;
 111
 112         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
 113                         cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
 114                         NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
 115                         NES_CQP_STAG_REM_ACC_EN);
 116
 117         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 118         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
 119         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 120
 121         atomic_set(&cqp_request->refcount, 2);
 122         nes_post_cqp_request(nesdev, cqp_request);
 123
 124         /* Wait for CQP */
 125         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
 126                         NES_EVENT_TIMEOUT);
 127         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
 128                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 129                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
 130         if ((!ret) || (cqp_request->major_code)) {
 131                 nes_put_cqp_request(nesdev, cqp_request);
 132                 kfree(nesmr);
 133                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 134                 if (!ret) {
 135                         return ERR_PTR(-ETIME);
 136                 } else {
 137                         return ERR_PTR(-ENOMEM);
 138                 }
 139         }
 140         nes_put_cqp_request(nesdev, cqp_request);
 141
 142         nesmr->ibmw.rkey = stag;
 143         nesmr->mode = IWNES_MEMREG_TYPE_MW;
 144         ibmw = &nesmr->ibmw;
 145         nesmr->pbl_4k = 0;
 146         nesmr->pbls_used = 0;
 147
 148         return ibmw;
 149 }
 150
 151
 152 /**
 153  * nes_dealloc_mw
 154  */
 155 static int nes_dealloc_mw(struct ib_mw *ibmw)
 156 {
 157         struct nes_mr *nesmr = to_nesmw(ibmw);
 158         struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
 159         struct nes_device *nesdev = nesvnic->nesdev;
 160         struct nes_adapter *nesadapter = nesdev->nesadapter;
 161         struct nes_hw_cqp_wqe *cqp_wqe;
 162         struct nes_cqp_request *cqp_request;
 163         int err = 0;
 164         int ret;
 165
 166         /* Deallocate the window with the adapter */
 167         cqp_request = nes_get_cqp_request(nesdev);
 168         if (cqp_request == NULL) {
 169                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 170                 return -ENOMEM;
 171         }
 172         cqp_request->waiting = 1;
 173         cqp_wqe = &cqp_request->cqp_wqe;
 174         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 175         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
 176         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
 177
 178         atomic_set(&cqp_request->refcount, 2);
 179         nes_post_cqp_request(nesdev, cqp_request);
 180
 181         /* Wait for CQP */
 182         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
 183                         ibmw->rkey);
 184         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
 185                         NES_EVENT_TIMEOUT);
 186         nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
 187                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
 188                         ret, cqp_request->major_code, cqp_request->minor_code);
 189         if (!ret)
 190                 err = -ETIME;
 191         else if (cqp_request->major_code)
 192                 err = -EIO;
 193
 194         nes_put_cqp_request(nesdev, cqp_request);
 195
 196         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
 197                         (ibmw->rkey & 0x0fffff00) >> 8);
 198         kfree(nesmr);
 199
 200         return err;
 201 }
 202
 203
 204 /**
 205  * nes_bind_mw
 206  */
 207 static int nes_bind_mw(struct ib_qp *ibqp, struct ib_mw *ibmw,
 208                 struct ib_mw_bind *ibmw_bind)
 209 {
 210         u64 u64temp;
 211         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
 212         struct nes_device *nesdev = nesvnic->nesdev;
 213         /* struct nes_mr *nesmr = to_nesmw(ibmw); */
 214         struct nes_qp *nesqp = to_nesqp(ibqp);
 215         struct nes_hw_qp_wqe *wqe;
 216         unsigned long flags = 0;
 217         u32 head;
 218         u32 wqe_misc = 0;
 219         u32 qsize;
 220
 221         if (nesqp->ibqp_state > IB_QPS_RTS)
 222                 return -EINVAL;
 223
 224         spin_lock_irqsave(&nesqp->lock, flags);
 225
 226         head = nesqp->hwqp.sq_head;
 227         qsize = nesqp->hwqp.sq_tail;
 228
 229         /* Check for SQ overflow */
 230         if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
 231                 spin_unlock_irqrestore(&nesqp->lock, flags);
 232                 return -ENOMEM;
 233         }
 234
 235         wqe = &nesqp->hwqp.sq_vbase[head];
 236         /* nes_debug(NES_DBG_MR, "processing sq wqe at %p, head = %u.\n", wqe, head); */
 237         nes_fill_init_qp_wqe(wqe, nesqp, head);
 238         u64temp = ibmw_bind->wr_id;
 239         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX, u64temp);
 240         wqe_misc = NES_IWARP_SQ_OP_BIND;
 241
 242         wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
 243
 244         if (ibmw_bind->send_flags & IB_SEND_SIGNALED)
 245                 wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
 246
 247         if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_WRITE) {
 248                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE;
 249         }
 250         if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_READ) {
 251                 wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_READ;
 252         }
 253
 254         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_MISC_IDX, wqe_misc);
 255         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MR_IDX, ibmw_bind->mr->lkey);
 256         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MW_IDX, ibmw->rkey);
 257         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_LENGTH_LOW_IDX,
 258                         ibmw_bind->length);
 259         wqe->wqe_words[NES_IWARP_SQ_BIND_WQE_LENGTH_HIGH_IDX] = 0;
 260         u64temp = (u64)ibmw_bind->addr;
 261         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_VA_FBO_LOW_IDX, u64temp);
 262
 263         head++;
 264         if (head >= qsize)
 265                 head = 0;
 266
 267         nesqp->hwqp.sq_head = head;
 268         barrier();
 269
 270         nes_write32(nesdev->regs+NES_WQE_ALLOC,
 271                         (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
 272
 273         spin_unlock_irqrestore(&nesqp->lock, flags);
 274
 275         return 0;
 276 }
 277
 278
 279 /*
 280  * nes_alloc_fast_mr
 281  */
 282 static int alloc_fast_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
 283                              u32 stag, u32 page_count)
 284 {
 285         struct nes_hw_cqp_wqe *cqp_wqe;
 286         struct nes_cqp_request *cqp_request;
 287         unsigned long flags;
 288         int ret;
 289         struct nes_adapter *nesadapter = nesdev->nesadapter;
 290         u32 opcode = 0;
 291         u16 major_code;
 292         u64 region_length = page_count * PAGE_SIZE;
 293
 294
 295         cqp_request = nes_get_cqp_request(nesdev);
 296         if (cqp_request == NULL) {
 297                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
 298                 return -ENOMEM;
 299         }
 300         nes_debug(NES_DBG_MR, "alloc_fast_reg_mr: page_count = %d, "
 301                               "region_length = %llu\n",
 302                               page_count, region_length);
 303         cqp_request->waiting = 1;
 304         cqp_wqe = &cqp_request->cqp_wqe;
 305
 306         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 307         if (nesadapter->free_4kpbl > 0) {
 308                 nesadapter->free_4kpbl--;
 309                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 310         } else {
 311                 /* No 4kpbl's available: */
 312                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 313                 nes_debug(NES_DBG_MR, "Out of Pbls\n");
 314                 nes_free_cqp_request(nesdev, cqp_request);
 315                 return -ENOMEM;
 316         }
 317
 318         opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_MR |
 319                  NES_CQP_STAG_PBL_BLK_SIZE | NES_CQP_STAG_VA_TO |
 320                  NES_CQP_STAG_REM_ACC_EN;
 321         /*
 322          * The current OFED API does not support the zero based TO option.
 323          * If added then need to changed the NES_CQP_STAG_VA* option.  Also,
 324          * the API does not support that ability to have the MR set for local
 325          * access only when created and not allow the SQ op to override. Given
 326          * this the remote enable must be set here.
 327          */
 328
 329         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 330         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 331         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, 1);
 332
 333         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
 334                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
 335         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
 336                         cpu_to_le32(nespd->pd_id & 0x00007fff);
 337
 338         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
 339         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, 0);
 340         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, 0);
 341         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, 0);
 342         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (page_count * 8));
 343         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
 344         barrier();
 345
 346         atomic_set(&cqp_request->refcount, 2);
 347         nes_post_cqp_request(nesdev, cqp_request);
 348
 349         /* Wait for CQP */
 350         ret = wait_event_timeout(cqp_request->waitq,
 351                                  (0 != cqp_request->request_done),
 352                                  NES_EVENT_TIMEOUT);
 353
 354         nes_debug(NES_DBG_MR, "Allocate STag 0x%08X completed, "
 355                   "wait_event_timeout ret = %u, CQP Major:Minor codes = "
 356                   "0x%04X:0x%04X.\n", stag, ret, cqp_request->major_code,
 357                   cqp_request->minor_code);
 358         major_code = cqp_request->major_code;
 359         nes_put_cqp_request(nesdev, cqp_request);
 360
 361         if (!ret || major_code) {
 362                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 363                 nesadapter->free_4kpbl++;
 364                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 365         }
 366
 367         if (!ret)
 368                 return -ETIME;
 369         else if (major_code)
 370                 return -EIO;
 371         return 0;
 372 }
 373
 374 /*
 375  * nes_alloc_fast_reg_mr
 376  */
 377 struct ib_mr *nes_alloc_fast_reg_mr(struct ib_pd *ibpd, int max_page_list_len)
 378 {
 379         struct nes_pd *nespd = to_nespd(ibpd);
 380         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 381         struct nes_device *nesdev = nesvnic->nesdev;
 382         struct nes_adapter *nesadapter = nesdev->nesadapter;
 383
 384         u32 next_stag_index;
 385         u8 stag_key = 0;
 386         u32 driver_key = 0;
 387         int err = 0;
 388         u32 stag_index = 0;
 389         struct nes_mr *nesmr;
 390         u32 stag;
 391         int ret;
 392         struct ib_mr *ibmr;
 393 /*
 394  * Note:  Set to always use a fixed length single page entry PBL.  This is to allow
 395  *       for the fast_reg_mr operation to always know the size of the PBL.
 396  */
 397         if (max_page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 398                 return ERR_PTR(-E2BIG);
 399
 400         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
 401         stag_key = (u8)next_stag_index;
 402         next_stag_index >>= 8;
 403         next_stag_index %= nesadapter->max_mr;
 404
 405         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
 406                                  nesadapter->max_mr, &stag_index,
 407                                  &next_stag_index);
 408         if (err)
 409                 return ERR_PTR(err);
 410
 411         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
 412         if (!nesmr) {
 413                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 414                 return ERR_PTR(-ENOMEM);
 415         }
 416
 417         stag = stag_index << 8;
 418         stag |= driver_key;
 419         stag += (u32)stag_key;
 420
 421         nes_debug(NES_DBG_MR, "Allocating STag 0x%08X index = 0x%08X\n",
 422                   stag, stag_index);
 423
 424         ret = alloc_fast_reg_mr(nesdev, nespd, stag, max_page_list_len);
 425
 426         if (ret == 0) {
 427                 nesmr->ibmr.rkey = stag;
 428                 nesmr->ibmr.lkey = stag;
 429                 nesmr->mode = IWNES_MEMREG_TYPE_FMEM;
 430                 ibmr = &nesmr->ibmr;
 431         } else {
 432                 kfree(nesmr);
 433                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
 434                 ibmr = ERR_PTR(-ENOMEM);
 435         }
 436         return ibmr;
 437 }
 438
 439 /*
 440  * nes_alloc_fast_reg_page_list
 441  */
 442 static struct ib_fast_reg_page_list *nes_alloc_fast_reg_page_list(
 443                                                         struct ib_device *ibdev,
 444                                                         int page_list_len)
 445 {
 446         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 447         struct nes_device *nesdev = nesvnic->nesdev;
 448         struct ib_fast_reg_page_list *pifrpl;
 449         struct nes_ib_fast_reg_page_list *pnesfrpl;
 450
 451         if (page_list_len > (NES_4K_PBL_CHUNK_SIZE / sizeof(u64)))
 452                 return ERR_PTR(-E2BIG);
 453         /*
 454          * Allocate the ib_fast_reg_page_list structure, the
 455          * nes_fast_bpl structure, and the PLB table.
 456          */
 457         pnesfrpl = kmalloc(sizeof(struct nes_ib_fast_reg_page_list) +
 458                            page_list_len * sizeof(u64), GFP_KERNEL);
 459
 460         if (!pnesfrpl)
 461                 return ERR_PTR(-ENOMEM);
 462
 463         pifrpl = &pnesfrpl->ibfrpl;
 464         pifrpl->page_list = &pnesfrpl->pbl;
 465         pifrpl->max_page_list_len = page_list_len;
 466         /*
 467          * Allocate the WQE PBL
 468          */
 469         pnesfrpl->nes_wqe_pbl.kva = pci_alloc_consistent(nesdev->pcidev,
 470                                                          page_list_len * sizeof(u64),
 471                                                          &pnesfrpl->nes_wqe_pbl.paddr);
 472
 473         if (!pnesfrpl->nes_wqe_pbl.kva) {
 474                 kfree(pnesfrpl);
 475                 return ERR_PTR(-ENOMEM);
 476         }
 477         nes_debug(NES_DBG_MR, "nes_alloc_fast_reg_pbl: nes_frpl = %p, "
 478                   "ibfrpl = %p, ibfrpl.page_list = %p, pbl.kva = %p, "
 479                   "pbl.paddr= %p\n", pnesfrpl, &pnesfrpl->ibfrpl,
 480                   pnesfrpl->ibfrpl.page_list, pnesfrpl->nes_wqe_pbl.kva,
 481                   (void *)pnesfrpl->nes_wqe_pbl.paddr);
 482
 483         return pifrpl;
 484 }
 485
 486 /*
 487  * nes_free_fast_reg_page_list
 488  */
 489 static void nes_free_fast_reg_page_list(struct ib_fast_reg_page_list *pifrpl)
 490 {
 491         struct nes_vnic *nesvnic = to_nesvnic(pifrpl->device);
 492         struct nes_device *nesdev = nesvnic->nesdev;
 493         struct nes_ib_fast_reg_page_list *pnesfrpl;
 494
 495         pnesfrpl = container_of(pifrpl, struct nes_ib_fast_reg_page_list, ibfrpl);
 496         /*
 497          * Free the WQE PBL.
 498          */
 499         pci_free_consistent(nesdev->pcidev,
 500                             pifrpl->max_page_list_len * sizeof(u64),
 501                             pnesfrpl->nes_wqe_pbl.kva,
 502                             pnesfrpl->nes_wqe_pbl.paddr);
 503         /*
 504          * Free the PBL structure
 505          */
 506         kfree(pnesfrpl);
 507 }
 508
 509 /**
 510  * nes_query_device
 511  */
 512 static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 513 {
 514         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 515         struct nes_device *nesdev = nesvnic->nesdev;
 516         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 517
 518         memset(props, 0, sizeof(*props));
 519         memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
 520
 521         props->fw_ver = nesdev->nesadapter->fw_ver;
 522         props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
 523         props->vendor_id = nesdev->nesadapter->vendor_id;
 524         props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
 525         props->hw_ver = nesdev->nesadapter->hw_rev;
 526         props->max_mr_size = 0x80000000;
 527         props->max_qp = nesibdev->max_qp;
 528         props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 529         props->max_sge = nesdev->nesadapter->max_sge;
 530         props->max_cq = nesibdev->max_cq;
 531         props->max_cqe = nesdev->nesadapter->max_cqe;
 532         props->max_mr = nesibdev->max_mr;
 533         props->max_mw = nesibdev->max_mr;
 534         props->max_pd = nesibdev->max_pd;
 535         props->max_sge_rd = 1;
 536         switch (nesdev->nesadapter->max_irrq_wr) {
 537                 case 0:
 538                         props->max_qp_rd_atom = 2;
 539                         break;
 540                 case 1:
 541                         props->max_qp_rd_atom = 8;
 542                         break;
 543                 case 2:
 544                         props->max_qp_rd_atom = 32;
 545                         break;
 546                 case 3:
 547                         props->max_qp_rd_atom = 64;
 548                         break;
 549                 default:
 550                         props->max_qp_rd_atom = 0;
 551         }
 552         props->max_qp_init_rd_atom = props->max_qp_rd_atom;
 553         props->atomic_cap = IB_ATOMIC_NONE;
 554         props->max_map_per_fmr = 1;
 555
 556         return 0;
 557 }
 558
 559
 560 /**
 561  * nes_query_port
 562  */
 563 static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
 564 {
 565         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 566         struct net_device *netdev = nesvnic->netdev;
 567
 568         memset(props, 0, sizeof(*props));
 569
 570         props->max_mtu = IB_MTU_4096;
 571
 572         if (netdev->mtu  >= 4096)
 573                 props->active_mtu = IB_MTU_4096;
 574         else if (netdev->mtu  >= 2048)
 575                 props->active_mtu = IB_MTU_2048;
 576         else if (netdev->mtu  >= 1024)
 577                 props->active_mtu = IB_MTU_1024;
 578         else if (netdev->mtu  >= 512)
 579                 props->active_mtu = IB_MTU_512;
 580         else
 581                 props->active_mtu = IB_MTU_256;
 582
 583         props->lid = 1;
 584         props->lmc = 0;
 585         props->sm_lid = 0;
 586         props->sm_sl = 0;
 587         if (nesvnic->linkup)
 588                 props->state = IB_PORT_ACTIVE;
 589         else
 590                 props->state = IB_PORT_DOWN;
 591         props->phys_state = 0;
 592         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 593                         IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 594         props->gid_tbl_len = 1;
 595         props->pkey_tbl_len = 1;
 596         props->qkey_viol_cntr = 0;
 597         props->active_width = IB_WIDTH_4X;
 598         props->active_speed = 1;
 599         props->max_msg_sz = 0x80000000;
 600
 601         return 0;
 602 }
 603
 604
 605 /**
 606  * nes_modify_port
 607  */
 608 static int nes_modify_port(struct ib_device *ibdev, u8 port,
 609                 int port_modify_mask, struct ib_port_modify *props)
 610 {
 611         return 0;
 612 }
 613
 614
 615 /**
 616  * nes_query_pkey
 617  */
 618 static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 619 {
 620         *pkey = 0;
 621         return 0;
 622 }
 623
 624
 625 /**
 626  * nes_query_gid
 627  */
 628 static int nes_query_gid(struct ib_device *ibdev, u8 port,
 629                 int index, union ib_gid *gid)
 630 {
 631         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 632
 633         memset(&(gid->raw[0]), 0, sizeof(gid->raw));
 634         memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
 635
 636         return 0;
 637 }
 638
 639
 640 /**
 641  * nes_alloc_ucontext - Allocate the user context data structure. This keeps track
 642  * of all objects associated with a particular user-mode client.
 643  */
 644 static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
 645                 struct ib_udata *udata)
 646 {
 647         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 648         struct nes_device *nesdev = nesvnic->nesdev;
 649         struct nes_adapter *nesadapter = nesdev->nesadapter;
 650         struct nes_alloc_ucontext_req req;
 651         struct nes_alloc_ucontext_resp uresp;
 652         struct nes_ucontext *nes_ucontext;
 653         struct nes_ib_device *nesibdev = nesvnic->nesibdev;
 654
 655
 656         if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
 657                 printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
 658                 return ERR_PTR(-EINVAL);
 659         }
 660
 661         if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
 662                 printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
 663                         req.userspace_ver, NES_ABI_USERSPACE_VER);
 664                 return ERR_PTR(-EINVAL);
 665         }
 666
 667
 668         memset(&uresp, 0, sizeof uresp);
 669
 670         uresp.max_qps = nesibdev->max_qp;
 671         uresp.max_pds = nesibdev->max_pd;
 672         uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
 673         uresp.virtwq = nesadapter->virtwq;
 674         uresp.kernel_ver = NES_ABI_KERNEL_VER;
 675
 676         nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
 677         if (!nes_ucontext)
 678                 return ERR_PTR(-ENOMEM);
 679
 680         nes_ucontext->nesdev = nesdev;
 681         nes_ucontext->mmap_wq_offset = uresp.max_pds;
 682         nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
 683                         ((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
 684                         PAGE_SIZE;
 685
 686
 687         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 688                 kfree(nes_ucontext);
 689                 return ERR_PTR(-EFAULT);
 690         }
 691
 692         INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
 693         INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
 694         atomic_set(&nes_ucontext->usecnt, 1);
 695         return &nes_ucontext->ibucontext;
 696 }
 697
 698
 699 /**
 700  * nes_dealloc_ucontext
 701  */
 702 static int nes_dealloc_ucontext(struct ib_ucontext *context)
 703 {
 704         /* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
 705         /* struct nes_device *nesdev = nesvnic->nesdev; */
 706         struct nes_ucontext *nes_ucontext = to_nesucontext(context);
 707
 708         if (!atomic_dec_and_test(&nes_ucontext->usecnt))
 709           return 0;
 710         kfree(nes_ucontext);
 711         return 0;
 712 }
 713
 714
 715 /**
 716  * nes_mmap
 717  */
 718 static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 719 {
 720         unsigned long index;
 721         struct nes_vnic *nesvnic = to_nesvnic(context->device);
 722         struct nes_device *nesdev = nesvnic->nesdev;
 723         /* struct nes_adapter *nesadapter = nesdev->nesadapter; */
 724         struct nes_ucontext *nes_ucontext;
 725         struct nes_qp *nesqp;
 726
 727         nes_ucontext = to_nesucontext(context);
 728
 729
 730         if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
 731                 index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
 732                 index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
 733                                 PAGE_SIZE-1) & (~(PAGE_SIZE-1));
 734                 if (!test_bit(index, nes_ucontext->allocated_wqs)) {
 735                         nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
 736                         return -EFAULT;
 737                 }
 738                 nesqp = nes_ucontext->mmap_nesqp[index];
 739                 if (nesqp == NULL) {
 740                         nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
 741                         return -EFAULT;
 742                 }
 743                 if (remap_pfn_range(vma, vma->vm_start,
 744                                 virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
 745                                 vma->vm_end - vma->vm_start,
 746                                 vma->vm_page_prot)) {
 747                         nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
 748                         return -EAGAIN;
 749                 }
 750                 vma->vm_private_data = nesqp;
 751                 return 0;
 752         } else {
 753                 index = vma->vm_pgoff;
 754                 if (!test_bit(index, nes_ucontext->allocated_doorbells))
 755                         return -EFAULT;
 756
 757                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 758                 if (io_remap_pfn_range(vma, vma->vm_start,
 759                                 (nesdev->doorbell_start +
 760                                 ((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
 761                                 >> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
 762                         return -EAGAIN;
 763                 vma->vm_private_data = nes_ucontext;
 764                 return 0;
 765         }
 766
 767         return -ENOSYS;
 768 }
 769
 770
 771 /**
 772  * nes_alloc_pd
 773  */
 774 static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
 775                 struct ib_ucontext *context, struct ib_udata *udata)
 776 {
 777         struct nes_pd *nespd;
 778         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
 779         struct nes_device *nesdev = nesvnic->nesdev;
 780         struct nes_adapter *nesadapter = nesdev->nesadapter;
 781         struct nes_ucontext *nesucontext;
 782         struct nes_alloc_pd_resp uresp;
 783         u32 pd_num = 0;
 784         int err;
 785
 786         nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
 787                         nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
 788                         atomic_read(&nesvnic->netdev->refcnt));
 789
 790         err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
 791                         nesadapter->max_pd, &pd_num, &nesadapter->next_pd);
 792         if (err) {
 793                 return ERR_PTR(err);
 794         }
 795
 796         nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
 797         if (!nespd) {
 798                 nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 799                 return ERR_PTR(-ENOMEM);
 800         }
 801
 802         nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 803                         nespd, nesvnic->nesibdev->ibdev.name);
 804
 805         nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 806
 807         if (context) {
 808                 nesucontext = to_nesucontext(context);
 809                 nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 810                                 NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 811                 nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 812                                 nespd->mmap_db_index, nespd->pd_id);
 813                 if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 814                         nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 815                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 816                         kfree(nespd);
 817                         return ERR_PTR(-ENOMEM);
 818                 }
 819
 820                 uresp.pd_id = nespd->pd_id;
 821                 uresp.mmap_db_index = nespd->mmap_db_index;
 822                 if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 823                         nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 824                         kfree(nespd);
 825                         return ERR_PTR(-EFAULT);
 826                 }
 827
 828                 set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 829                 nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
 830                 nesucontext->first_free_db = nespd->mmap_db_index + 1;
 831         }
 832
 833         nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
 834         return &nespd->ibpd;
 835 }
 836
 837
 838 /**
 839  * nes_dealloc_pd
 840  */
 841 static int nes_dealloc_pd(struct ib_pd *ibpd)
 842 {
 843         struct nes_ucontext *nesucontext;
 844         struct nes_pd *nespd = to_nespd(ibpd);
 845         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
 846         struct nes_device *nesdev = nesvnic->nesdev;
 847         struct nes_adapter *nesadapter = nesdev->nesadapter;
 848
 849         if ((ibpd->uobject) && (ibpd->uobject->context)) {
 850                 nesucontext = to_nesucontext(ibpd->uobject->context);
 851                 nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
 852                                 nespd->mmap_db_index);
 853                 clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 854                 nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
 855                 if (nesucontext->first_free_db > nespd->mmap_db_index) {
 856                         nesucontext->first_free_db = nespd->mmap_db_index;
 857                 }
 858         }
 859
 860         nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
 861                         nespd->pd_id, nespd);
 862         nes_free_resource(nesadapter, nesadapter->allocated_pds,
 863                         (nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
 864         kfree(nespd);
 865
 866         return 0;
 867 }
 868
 869
 870 /**
 871  * nes_create_ah
 872  */
 873 static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
 874 {
 875         return ERR_PTR(-ENOSYS);
 876 }
 877
 878
 879 /**
 880  * nes_destroy_ah
 881  */
 882 static int nes_destroy_ah(struct ib_ah *ah)
 883 {
 884         return -ENOSYS;
 885 }
 886
 887
 888 /**
 889  * nes_get_encoded_size
 890  */
 891 static inline u8 nes_get_encoded_size(int *size)
 892 {
 893         u8 encoded_size = 0;
 894         if (*size <= 32) {
 895                 *size = 32;
 896                 encoded_size = 1;
 897         } else if (*size <= 128) {
 898                 *size = 128;
 899                 encoded_size = 2;
 900         } else if (*size <= 512) {
 901                 *size = 512;
 902                 encoded_size = 3;
 903         }
 904         return (encoded_size);
 905 }
 906
 907
 908
 909 /**
 910  * nes_setup_virt_qp
 911  */
 912 static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
 913                 struct nes_vnic *nesvnic, int sq_size, int rq_size)
 914 {
 915         unsigned long flags;
 916         void *mem;
 917         __le64 *pbl = NULL;
 918         __le64 *tpbl;
 919         __le64 *pblbuffer;
 920         struct nes_device *nesdev = nesvnic->nesdev;
 921         struct nes_adapter *nesadapter = nesdev->nesadapter;
 922         u32 pbl_entries;
 923         u8 rq_pbl_entries;
 924         u8 sq_pbl_entries;
 925
 926         pbl_entries = nespbl->pbl_size >> 3;
 927         nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%lx\n",
 928                         nespbl->pbl_size, pbl_entries,
 929                         (void *)nespbl->pbl_vbase,
 930                         (unsigned long) nespbl->pbl_pbase);
 931         pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
 932         /* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
 933         /* the first pbl to be fro the rq_vbase... */
 934         rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 935         sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
 936         nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 937         if (!nespbl->page) {
 938                 nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
 939                 kfree(nespbl);
 940                 return -ENOMEM;
 941         }
 942
 943         nesqp->hwqp.sq_vbase = kmap(nespbl->page);
 944         nesqp->page = nespbl->page;
 945         if (!nesqp->hwqp.sq_vbase) {
 946                 nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
 947                 kfree(nespbl);
 948                 return -ENOMEM;
 949         }
 950
 951         /* Now to get to sq.. we need to calculate how many */
 952         /* PBL entries were used by the rq.. */
 953         pbl += sq_pbl_entries;
 954         nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
 955         /* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
 956         /*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
 957
 958         nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%lx rq_vbase=%p rq_pbase=%lx\n",
 959                   nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
 960                   nesqp->hwqp.rq_vbase, (unsigned long) nesqp->hwqp.rq_pbase);
 961         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 962         if (!nesadapter->free_256pbl) {
 963                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 964                                 nespbl->pbl_pbase);
 965                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 966                 kunmap(nesqp->page);
 967                 kfree(nespbl);
 968                 return -ENOMEM;
 969         }
 970         nesadapter->free_256pbl--;
 971         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 972
 973         nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
 974         pblbuffer = nesqp->pbl_vbase;
 975         if (!nesqp->pbl_vbase) {
 976                 /* memory allocated during nes_reg_user_mr() */
 977                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 978                                     nespbl->pbl_pbase);
 979                 kfree(nespbl);
 980                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 981                 nesadapter->free_256pbl++;
 982                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 983                 kunmap(nesqp->page);
 984                 return -ENOMEM;
 985         }
 986         memset(nesqp->pbl_vbase, 0, 256);
 987         /* fill in the page address in the pbl buffer.. */
 988         tpbl = pblbuffer + 16;
 989         pbl = (__le64 *)nespbl->pbl_vbase;
 990         while (sq_pbl_entries--)
 991                 *tpbl++ = *pbl++;
 992         tpbl = pblbuffer;
 993         while (rq_pbl_entries--)
 994                 *tpbl++ = *pbl++;
 995
 996         /* done with memory allocated during nes_reg_user_mr() */
 997         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
 998                             nespbl->pbl_pbase);
 999         kfree(nespbl);
1000
1001         nesqp->qp_mem_size =
1002                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256;     /* this is Q2 */
1003         /* Round up to a multiple of a page */
1004         nesqp->qp_mem_size += PAGE_SIZE - 1;
1005         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1006
1007         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1008                         &nesqp->hwqp.q2_pbase);
1009
1010         if (!mem) {
1011                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
1012                 nesqp->pbl_vbase = NULL;
1013                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1014                 nesadapter->free_256pbl++;
1015                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1016                 kunmap(nesqp->page);
1017                 return -ENOMEM;
1018         }
1019         nesqp->sq_kmapped = 1;
1020         nesqp->hwqp.q2_vbase = mem;
1021         mem += 256;
1022         memset(nesqp->hwqp.q2_vbase, 0, 256);
1023         nesqp->nesqp_context = mem;
1024         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1025         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1026
1027         return 0;
1028 }
1029
1030
1031 /**
1032  * nes_setup_mmap_qp
1033  */
1034 static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
1035                 int sq_size, int rq_size)
1036 {
1037         void *mem;
1038         struct nes_device *nesdev = nesvnic->nesdev;
1039
1040         nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
1041                         (sizeof(struct nes_hw_qp_wqe) * rq_size) +
1042                         max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
1043                         256; /* this is Q2 */
1044         /* Round up to a multiple of a page */
1045         nesqp->qp_mem_size += PAGE_SIZE - 1;
1046         nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
1047
1048         mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1049                         &nesqp->hwqp.sq_pbase);
1050         if (!mem)
1051                 return -ENOMEM;
1052         nes_debug(NES_DBG_QP, "PCI consistent memory for "
1053                         "host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
1054                         mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
1055
1056         memset(mem, 0, nesqp->qp_mem_size);
1057
1058         nesqp->hwqp.sq_vbase = mem;
1059         mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
1060
1061         nesqp->hwqp.rq_vbase = mem;
1062         nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
1063                         sizeof(struct nes_hw_qp_wqe) * sq_size;
1064         mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
1065
1066         nesqp->hwqp.q2_vbase = mem;
1067         nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
1068                         sizeof(struct nes_hw_qp_wqe) * rq_size;
1069         mem += 256;
1070         memset(nesqp->hwqp.q2_vbase, 0, 256);
1071
1072         nesqp->nesqp_context = mem;
1073         nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
1074         memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
1075         return 0;
1076 }
1077
1078
1079 /**
1080  * nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
1081  */
1082 static inline void nes_free_qp_mem(struct nes_device *nesdev,
1083                 struct nes_qp *nesqp, int virt_wqs)
1084 {
1085         unsigned long flags;
1086         struct nes_adapter *nesadapter = nesdev->nesadapter;
1087         if (!virt_wqs) {
1088                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
1089                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
1090         }else {
1091                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1092                 nesadapter->free_256pbl++;
1093                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1094                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
1095                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
1096                 nesqp->pbl_vbase = NULL;
1097                 if (nesqp->sq_kmapped) {
1098                         nesqp->sq_kmapped = 0;
1099                         kunmap(nesqp->page);
1100                 }
1101         }
1102 }
1103
1104
1105 /**
1106  * nes_create_qp
1107  */
1108 static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
1109                 struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
1110 {
1111         u64 u64temp= 0;
1112         u64 u64nesqp = 0;
1113         struct nes_pd *nespd = to_nespd(ibpd);
1114         struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
1115         struct nes_device *nesdev = nesvnic->nesdev;
1116         struct nes_adapter *nesadapter = nesdev->nesadapter;
1117         struct nes_qp *nesqp;
1118         struct nes_cq *nescq;
1119         struct nes_ucontext *nes_ucontext;
1120         struct nes_hw_cqp_wqe *cqp_wqe;
1121         struct nes_cqp_request *cqp_request;
1122         struct nes_create_qp_req req;
1123         struct nes_create_qp_resp uresp;
1124         struct nes_pbl  *nespbl = NULL;
1125         u32 qp_num = 0;
1126         u32 opcode = 0;
1127         /* u32 counter = 0; */
1128         void *mem;
1129         unsigned long flags;
1130         int ret;
1131         int err;
1132         int virt_wqs = 0;
1133         int sq_size;
1134         int rq_size;
1135         u8 sq_encoded_size;
1136         u8 rq_encoded_size;
1137         /* int counter; */
1138
1139         if (init_attr->create_flags)
1140                 return ERR_PTR(-EINVAL);
1141
1142         atomic_inc(&qps_created);
1143         switch (init_attr->qp_type) {
1144                 case IB_QPT_RC:
1145                         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
1146                                 init_attr->cap.max_inline_data = 0;
1147                         } else {
1148                                 init_attr->cap.max_inline_data = 64;
1149                         }
1150                         sq_size = init_attr->cap.max_send_wr;
1151                         rq_size = init_attr->cap.max_recv_wr;
1152
1153                         /* check if the encoded sizes are OK or not... */
1154                         sq_encoded_size = nes_get_encoded_size(&sq_size);
1155                         rq_encoded_size = nes_get_encoded_size(&rq_size);
1156
1157                         if ((!sq_encoded_size) || (!rq_encoded_size)) {
1158                                 nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
1159                                                 rq_size, sq_size);
1160                                 return ERR_PTR(-EINVAL);
1161                         }
1162
1163                         init_attr->cap.max_send_wr = sq_size -2;
1164                         init_attr->cap.max_recv_wr = rq_size -1;
1165                         nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
1166
1167                         ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
1168                                         nesadapter->max_qp, &qp_num, &nesadapter->next_qp);
1169                         if (ret) {
1170                                 return ERR_PTR(ret);
1171                         }
1172
1173                         /* Need 512 (actually now 1024) byte alignment on this structure */
1174                         mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
1175                         if (!mem) {
1176                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1177                                 nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
1178                                 return ERR_PTR(-ENOMEM);
1179                         }
1180                         u64nesqp = (unsigned long)mem;
1181                         u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1182                         u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
1183                         u64nesqp &= ~u64temp;
1184                         nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
1185                         /* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p.  Rounded to closest %u\n",
1186                                         nesqp, mem, NES_SW_CONTEXT_ALIGN); */
1187                         nesqp->allocated_buffer = mem;
1188
1189                         if (udata) {
1190                                 if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
1191                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1192                                         kfree(nesqp->allocated_buffer);
1193                                         nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
1194                                         return NULL;
1195                                 }
1196                                 if (req.user_wqe_buffers) {
1197                                         virt_wqs = 1;
1198                                 }
1199                                 if ((ibpd->uobject) && (ibpd->uobject->context)) {
1200                                         nesqp->user_mode = 1;
1201                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1202                                         if (virt_wqs) {
1203                                                 err = 1;
1204                                                 list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
1205                                                         if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
1206                                                                 list_del(&nespbl->list);
1207                                                                 err = 0;
1208                                                                 nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
1209                                                                           nespbl, nespbl->user_base);
1210                                                                 break;
1211                                                         }
1212                                                 }
1213                                                 if (err) {
1214                                                         nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
1215                                                                   (long long unsigned int)req.user_wqe_buffers);
1216                                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1217                                                         kfree(nesqp->allocated_buffer);
1218                                                         return ERR_PTR(-EFAULT);
1219                                                 }
1220                                         }
1221
1222                                         nes_ucontext = to_nesucontext(ibpd->uobject->context);
1223                                         nesqp->mmap_sq_db_index =
1224                                                 find_next_zero_bit(nes_ucontext->allocated_wqs,
1225                                                                    NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
1226                                         /* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
1227                                                         nespd->mmap_db_index); */
1228                                         if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
1229                                                 nes_debug(NES_DBG_QP,
1230                                                           "db index > max user regions, failing create QP\n");
1231                                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1232                                                 if (virt_wqs) {
1233                                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1234                                                                             nespbl->pbl_pbase);
1235                                                         kfree(nespbl);
1236                                                 }
1237                                                 kfree(nesqp->allocated_buffer);
1238                                                 return ERR_PTR(-ENOMEM);
1239                                         }
1240                                         set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
1241                                         nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
1242                                         nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
1243                                 } else {
1244                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1245                                         kfree(nesqp->allocated_buffer);
1246                                         return ERR_PTR(-EFAULT);
1247                                 }
1248                         }
1249                         err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
1250                                         nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
1251                         if (err) {
1252                                 nes_debug(NES_DBG_QP,
1253                                           "error geting qp mem code = %d\n", err);
1254                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1255                                 kfree(nesqp->allocated_buffer);
1256                                 return ERR_PTR(-ENOMEM);
1257                         }
1258
1259                         nesqp->hwqp.sq_size = sq_size;
1260                         nesqp->hwqp.sq_encoded_size = sq_encoded_size;
1261                         nesqp->hwqp.sq_head = 1;
1262                         nesqp->hwqp.rq_size = rq_size;
1263                         nesqp->hwqp.rq_encoded_size = rq_encoded_size;
1264                         /* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
1265                                         (void *)nesqp->nesqp_context_pbase);
1266                         */
1267                         nesqp->hwqp.qp_id = qp_num;
1268                         nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
1269                         nesqp->nespd = nespd;
1270
1271                         nescq = to_nescq(init_attr->send_cq);
1272                         nesqp->nesscq = nescq;
1273                         nescq = to_nescq(init_attr->recv_cq);
1274                         nesqp->nesrcq = nescq;
1275
1276                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
1277                                         NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
1278                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
1279                                         NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
1280                         nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
1281                                         NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
1282                         if (!udata) {
1283                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
1284                                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
1285                         }
1286                         nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
1287                                         ((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
1288                         u64temp = (u64)nesqp->hwqp.sq_pbase;
1289                         nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1290                         nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1291
1292
1293                         if (!virt_wqs) {
1294                                 u64temp = (u64)nesqp->hwqp.sq_pbase;
1295                                 nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
1296                                 nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1297                                 u64temp = (u64)nesqp->hwqp.rq_pbase;
1298                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1299                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1300                         } else {
1301                                 u64temp = (u64)nesqp->pbl_pbase;
1302                                 nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
1303                                 nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1304                         }
1305
1306                         /* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
1307                                         nesvnic->next_qp_nic_index,
1308                                         nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
1309                         spin_lock_irqsave(&nesdev->cqp.lock, flags);
1310                         nesqp->nesqp_context->misc2 |= cpu_to_le32(
1311                                         (u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
1312                                         NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
1313                         nesvnic->next_qp_nic_index++;
1314                         if ((nesvnic->next_qp_nic_index > 3) ||
1315                                         (nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
1316                                 nesvnic->next_qp_nic_index = 0;
1317                         }
1318                         spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1319
1320                         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
1321                         u64temp = (u64)nesqp->hwqp.q2_pbase;
1322                         nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
1323                         nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
1324                         nesqp->nesqp_context->aeq_token_low =  cpu_to_le32((u32)((unsigned long)(nesqp)));
1325                         nesqp->nesqp_context->aeq_token_high =  cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
1326                         nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
1327                                         NES_QPCONTEXT_ORDIRD_AAH |
1328                                         ((((u32)nesadapter->max_irrq_wr) <<
1329                                         NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
1330                         if (disable_mpa_crc) {
1331                                 nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
1332                                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
1333                         }
1334
1335
1336                         /* Create the QP */
1337                         cqp_request = nes_get_cqp_request(nesdev);
1338                         if (cqp_request == NULL) {
1339                                 nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
1340                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1341                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1342                                 kfree(nesqp->allocated_buffer);
1343                                 return ERR_PTR(-ENOMEM);
1344                         }
1345                         cqp_request->waiting = 1;
1346                         cqp_wqe = &cqp_request->cqp_wqe;
1347
1348                         if (!virt_wqs) {
1349                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
1350                                         NES_CQP_QP_IWARP_STATE_IDLE;
1351                         } else {
1352                                 opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
1353                                         NES_CQP_QP_IWARP_STATE_IDLE;
1354                         }
1355                         opcode |= NES_CQP_QP_CQS_VALID;
1356                         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1357                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1358                         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
1359
1360                         u64temp = (u64)nesqp->nesqp_context_pbase;
1361                         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
1362
1363                         atomic_set(&cqp_request->refcount, 2);
1364                         nes_post_cqp_request(nesdev, cqp_request);
1365
1366                         /* Wait for CQP */
1367                         nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
1368                                         nesqp->hwqp.qp_id);
1369                         ret = wait_event_timeout(cqp_request->waitq,
1370                                         (cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
1371                         nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
1372                                         " nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
1373                                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1374                                         nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
1375                                         cqp_request->major_code, cqp_request->minor_code);
1376                         if ((!ret) || (cqp_request->major_code)) {
1377                                 nes_put_cqp_request(nesdev, cqp_request);
1378                                 nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1379                                 nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1380                                 kfree(nesqp->allocated_buffer);
1381                                 if (!ret) {
1382                                         return ERR_PTR(-ETIME);
1383                                 } else {
1384                                         return ERR_PTR(-EIO);
1385                                 }
1386                         }
1387
1388                         nes_put_cqp_request(nesdev, cqp_request);
1389
1390                         if (ibpd->uobject) {
1391                                 uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
1392                                 uresp.actual_sq_size = sq_size;
1393                                 uresp.actual_rq_size = rq_size;
1394                                 uresp.qp_id = nesqp->hwqp.qp_id;
1395                                 uresp.nes_drv_opt = nes_drv_opt;
1396                                 if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
1397                                         nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
1398                                         nes_free_qp_mem(nesdev, nesqp,virt_wqs);
1399                                         kfree(nesqp->allocated_buffer);
1400                                         return ERR_PTR(-EFAULT);
1401                                 }
1402                         }
1403
1404                         nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
1405                                         nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
1406                         spin_lock_init(&nesqp->lock);
1407                         nes_add_ref(&nesqp->ibqp);
1408                         break;
1409                 default:
1410                         nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
1411                         return ERR_PTR(-EINVAL);
1412         }
1413
1414         nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
1415
1416         /* update the QP table */
1417         nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
1418         nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
1419                         atomic_read(&nesvnic->netdev->refcnt));
1420
1421         return &nesqp->ibqp;
1422 }
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;
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 = IW_CM_EVENT_STATUS_TIMEOUT;
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
1523         nes_rem_ref(&nesqp->ibqp);
1524         return 0;
1525 }
1526
1527
1528 /**
1529  * nes_create_cq
1530  */
1531 static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
1532                 int comp_vector,
1533                 struct ib_ucontext *context, struct ib_udata *udata)
1534 {
1535         u64 u64temp;
1536         struct nes_vnic *nesvnic = to_nesvnic(ibdev);
1537         struct nes_device *nesdev = nesvnic->nesdev;
1538         struct nes_adapter *nesadapter = nesdev->nesadapter;
1539         struct nes_cq *nescq;
1540         struct nes_ucontext *nes_ucontext = NULL;
1541         struct nes_cqp_request *cqp_request;
1542         void *mem = NULL;
1543         struct nes_hw_cqp_wqe *cqp_wqe;
1544         struct nes_pbl *nespbl = NULL;
1545         struct nes_create_cq_req req;
1546         struct nes_create_cq_resp resp;
1547         u32 cq_num = 0;
1548         u32 opcode = 0;
1549         u32 pbl_entries = 1;
1550         int err;
1551         unsigned long flags;
1552         int ret;
1553
1554         if (entries > nesadapter->max_cqe)
1555                 return ERR_PTR(-EINVAL);
1556
1557         err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
1558                         nesadapter->max_cq, &cq_num, &nesadapter->next_cq);
1559         if (err) {
1560                 return ERR_PTR(err);
1561         }
1562
1563         nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
1564         if (!nescq) {
1565                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1566                 nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
1567                 return ERR_PTR(-ENOMEM);
1568         }
1569
1570         nescq->hw_cq.cq_size = max(entries + 1, 5);
1571         nescq->hw_cq.cq_number = cq_num;
1572         nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
1573
1574
1575         if (context) {
1576                 nes_ucontext = to_nesucontext(context);
1577                 if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
1578                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1579                         kfree(nescq);
1580                         return ERR_PTR(-EFAULT);
1581                 }
1582                 nesvnic->mcrq_ucontext = nes_ucontext;
1583                 nes_ucontext->mcrqf = req.mcrqf;
1584                 if (nes_ucontext->mcrqf) {
1585                         if (nes_ucontext->mcrqf & 0x80000000)
1586                                 nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 28 + 2 * ((nes_ucontext->mcrqf & 0xf) - 1);
1587                         else if (nes_ucontext->mcrqf & 0x40000000)
1588                                 nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
1589                         else
1590                                 nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
1591                         nescq->mcrqf = nes_ucontext->mcrqf;
1592                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1593                 }
1594                 nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
1595                                 (unsigned long)req.user_cq_buffer, entries);
1596                 err = 1;
1597                 list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
1598                         if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
1599                                 list_del(&nespbl->list);
1600                                 err = 0;
1601                                 nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
1602                                                 nespbl);
1603                                 break;
1604                         }
1605                 }
1606                 if (err) {
1607                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1608                         kfree(nescq);
1609                         return ERR_PTR(-EFAULT);
1610                 }
1611
1612                 pbl_entries = nespbl->pbl_size >> 3;
1613                 nescq->cq_mem_size = 0;
1614         } else {
1615                 nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
1616                 nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
1617                                 entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
1618
1619                 /* allocate the physical buffer space */
1620                 mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
1621                                 &nescq->hw_cq.cq_pbase);
1622                 if (!mem) {
1623                         printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
1624                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1625                         kfree(nescq);
1626                         return ERR_PTR(-ENOMEM);
1627                 }
1628
1629                 memset(mem, 0, nescq->cq_mem_size);
1630                 nescq->hw_cq.cq_vbase = mem;
1631                 nescq->hw_cq.cq_head = 0;
1632                 nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
1633                                 nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
1634                                 (u32)nescq->hw_cq.cq_pbase);
1635         }
1636
1637         nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
1638         spin_lock_init(&nescq->lock);
1639
1640         /* send CreateCQ request to CQP */
1641         cqp_request = nes_get_cqp_request(nesdev);
1642         if (cqp_request == NULL) {
1643                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1644                 if (!context)
1645                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1646                                         nescq->hw_cq.cq_pbase);
1647                 else {
1648                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1649                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1650                         kfree(nespbl);
1651                 }
1652
1653                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1654                 kfree(nescq);
1655                 return ERR_PTR(-ENOMEM);
1656         }
1657         cqp_request->waiting = 1;
1658         cqp_wqe = &cqp_request->cqp_wqe;
1659
1660         opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
1661                         NES_CQP_CQ_CHK_OVERFLOW |
1662                         NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
1663
1664         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1665
1666         if (pbl_entries != 1) {
1667                 if (pbl_entries > 32) {
1668                         /* use 4k pbl */
1669                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
1670                         if (nesadapter->free_4kpbl == 0) {
1671                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1672                                 nes_free_cqp_request(nesdev, cqp_request);
1673                                 if (!context)
1674                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1675                                                         nescq->hw_cq.cq_pbase);
1676                                 else {
1677                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1678                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1679                                         kfree(nespbl);
1680                                 }
1681                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1682                                 kfree(nescq);
1683                                 return ERR_PTR(-ENOMEM);
1684                         } else {
1685                                 opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
1686                                 nescq->virtual_cq = 2;
1687                                 nesadapter->free_4kpbl--;
1688                         }
1689                 } else {
1690                         /* use 256 byte pbl */
1691                         nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
1692                         if (nesadapter->free_256pbl == 0) {
1693                                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1694                                 nes_free_cqp_request(nesdev, cqp_request);
1695                                 if (!context)
1696                                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1697                                                         nescq->hw_cq.cq_pbase);
1698                                 else {
1699                                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1700                                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1701                                         kfree(nespbl);
1702                                 }
1703                                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1704                                 kfree(nescq);
1705                                 return ERR_PTR(-ENOMEM);
1706                         } else {
1707                                 opcode |= NES_CQP_CQ_VIRT;
1708                                 nescq->virtual_cq = 1;
1709                                 nesadapter->free_256pbl--;
1710                         }
1711                 }
1712         }
1713
1714         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1715
1716         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1717         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1718         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1719                         (nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1720
1721         if (context) {
1722                 if (pbl_entries != 1)
1723                         u64temp = (u64)nespbl->pbl_pbase;
1724                 else
1725                         u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
1726                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
1727                                 nes_ucontext->mmap_db_index[0]);
1728         } else {
1729                 u64temp = (u64)nescq->hw_cq.cq_pbase;
1730                 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
1731         }
1732         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
1733         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
1734         u64temp = (u64)(unsigned long)&nescq->hw_cq;
1735         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
1736                         cpu_to_le32((u32)(u64temp >> 1));
1737         cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
1738                         cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
1739
1740         atomic_set(&cqp_request->refcount, 2);
1741         nes_post_cqp_request(nesdev, cqp_request);
1742
1743         /* Wait for CQP */
1744         nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
1745                         nescq->hw_cq.cq_number);
1746         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1747                         NES_EVENT_TIMEOUT * 2);
1748         nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
1749                         nescq->hw_cq.cq_number, ret);
1750         if ((!ret) || (cqp_request->major_code)) {
1751                 nes_put_cqp_request(nesdev, cqp_request);
1752                 if (!context)
1753                         pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
1754                                         nescq->hw_cq.cq_pbase);
1755                 else {
1756                         pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
1757                                             nespbl->pbl_vbase, nespbl->pbl_pbase);
1758                         kfree(nespbl);
1759                 }
1760                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1761                 kfree(nescq);
1762                 return ERR_PTR(-EIO);
1763         }
1764         nes_put_cqp_request(nesdev, cqp_request);
1765
1766         if (context) {
1767                 /* free the nespbl */
1768                 pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
1769                                 nespbl->pbl_pbase);
1770                 kfree(nespbl);
1771                 resp.cq_id = nescq->hw_cq.cq_number;
1772                 resp.cq_size = nescq->hw_cq.cq_size;
1773                 resp.mmap_db_index = 0;
1774                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
1775                         nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
1776                         kfree(nescq);
1777                         return ERR_PTR(-EFAULT);
1778                 }
1779         }
1780
1781         return &nescq->ibcq;
1782 }
1783
1784
1785 /**
1786  * nes_destroy_cq
1787  */
1788 static int nes_destroy_cq(struct ib_cq *ib_cq)
1789 {
1790         struct nes_cq *nescq;
1791         struct nes_device *nesdev;
1792         struct nes_vnic *nesvnic;
1793         struct nes_adapter *nesadapter;
1794         struct nes_hw_cqp_wqe *cqp_wqe;
1795         struct nes_cqp_request *cqp_request;
1796         unsigned long flags;
1797         u32 opcode = 0;
1798         int ret;
1799
1800         if (ib_cq == NULL)
1801                 return 0;
1802
1803         nescq = to_nescq(ib_cq);
1804         nesvnic = to_nesvnic(ib_cq->device);
1805         nesdev = nesvnic->nesdev;
1806         nesadapter = nesdev->nesadapter;
1807
1808         nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
1809
1810         /* Send DestroyCQ request to CQP */
1811         cqp_request = nes_get_cqp_request(nesdev);
1812         if (cqp_request == NULL) {
1813                 nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
1814                 return -ENOMEM;
1815         }
1816         cqp_request->waiting = 1;
1817         cqp_wqe = &cqp_request->cqp_wqe;
1818         opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
1819         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1820         if (nescq->virtual_cq == 1) {
1821                 nesadapter->free_256pbl++;
1822                 if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
1823                         printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
1824                                         __func__, nesadapter->free_256pbl, nesadapter->max_256pbl);
1825                 }
1826         } else if (nescq->virtual_cq == 2) {
1827                 nesadapter->free_4kpbl++;
1828                 if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
1829                         printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
1830                                         __func__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
1831                 }
1832                 opcode |= NES_CQP_CQ_4KB_CHUNK;
1833         }
1834
1835         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1836
1837         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1838         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
1839         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1840                 (nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
1841         if (!nescq->mcrqf)
1842                 nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
1843
1844         atomic_set(&cqp_request->refcount, 2);
1845         nes_post_cqp_request(nesdev, cqp_request);
1846
1847         /* Wait for CQP */
1848         nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
1849                         nescq->hw_cq.cq_number);
1850         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
1851                         NES_EVENT_TIMEOUT);
1852         nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
1853                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
1854                         nescq->hw_cq.cq_number, ret, cqp_request->major_code,
1855                         cqp_request->minor_code);
1856         if (!ret) {
1857                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
1858                                         nescq->hw_cq.cq_number);
1859                 ret = -ETIME;
1860         } else if (cqp_request->major_code) {
1861                 nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
1862                                         nescq->hw_cq.cq_number);
1863                 ret = -EIO;
1864         } else {
1865                 ret = 0;
1866         }
1867         nes_put_cqp_request(nesdev, cqp_request);
1868
1869         if (nescq->cq_mem_size)
1870                 pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
1871                                     nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
1872         kfree(nescq);
1873
1874         return ret;
1875 }
1876
1877 /**
1878  * root_256
1879  */
1880 static u32 root_256(struct nes_device *nesdev,
1881                     struct nes_root_vpbl *root_vpbl,
1882                     struct nes_root_vpbl *new_root,
1883                     u16 pbl_count_4k)
1884 {
1885         u64 leaf_pbl;
1886         int i, j, k;
1887
1888         if (pbl_count_4k == 1) {
1889                 new_root->pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
1890                                                 512, &new_root->pbl_pbase);
1891
1892                 if (new_root->pbl_vbase == NULL)
1893                         return 0;
1894
1895                 leaf_pbl = (u64)root_vpbl->pbl_pbase;
1896                 for (i = 0; i < 16; i++) {
1897                         new_root->pbl_vbase[i].pa_low =
1898                                 cpu_to_le32((u32)leaf_pbl);
1899                         new_root->pbl_vbase[i].pa_high =
1900                                 cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1901                         leaf_pbl += 256;
1902                 }
1903         } else {
1904                 for (i = 3; i >= 0; i--) {
1905                         j = i * 16;
1906                         root_vpbl->pbl_vbase[j] = root_vpbl->pbl_vbase[i];
1907                         leaf_pbl = le32_to_cpu(root_vpbl->pbl_vbase[j].pa_low) +
1908                             (((u64)le32_to_cpu(root_vpbl->pbl_vbase[j].pa_high))
1909                                 << 32);
1910                         for (k = 1; k < 16; k++) {
1911                                 leaf_pbl += 256;
1912                                 root_vpbl->pbl_vbase[j + k].pa_low =
1913                                                 cpu_to_le32((u32)leaf_pbl);
1914                                 root_vpbl->pbl_vbase[j + k].pa_high =
1915                                     cpu_to_le32((u32)((((u64)leaf_pbl) >> 32)));
1916                         }
1917                 }
1918         }
1919
1920         return 1;
1921 }
1922
1923
1924 /**
1925  * nes_reg_mr
1926  */
1927 static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
1928                 u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
1929                 dma_addr_t single_buffer, u16 pbl_count_4k,
1930                 u16 residual_page_count_4k, int acc, u64 *iova_start,
1931                 u16 *actual_pbl_cnt, u8 *used_4k_pbls)
1932 {
1933         struct nes_hw_cqp_wqe *cqp_wqe;
1934         struct nes_cqp_request *cqp_request;
1935         unsigned long flags;
1936         int ret;
1937         struct nes_adapter *nesadapter = nesdev->nesadapter;
1938         uint pg_cnt = 0;
1939         u16 pbl_count_256 = 0;
1940         u16 pbl_count = 0;
1941         u8  use_256_pbls = 0;
1942         u8  use_4k_pbls = 0;
1943         u16 use_two_level = (pbl_count_4k > 1) ? 1 : 0;
1944         struct nes_root_vpbl new_root = {0, 0, 0};
1945         u32 opcode = 0;
1946         u16 major_code;
1947
1948         /* Register the region with the adapter */
1949         cqp_request = nes_get_cqp_request(nesdev);
1950         if (cqp_request == NULL) {
1951                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
1952                 return -ENOMEM;
1953         }
1954         cqp_request->waiting = 1;
1955         cqp_wqe = &cqp_request->cqp_wqe;
1956
1957         if (pbl_count_4k) {
1958                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
1959
1960                 pg_cnt = ((pbl_count_4k - 1) * 512) + residual_page_count_4k;
1961                 pbl_count_256 = (pg_cnt + 31) / 32;
1962                 if (pg_cnt <= 32) {
1963                         if (pbl_count_256 <= nesadapter->free_256pbl)
1964                                 use_256_pbls = 1;
1965                         else if (pbl_count_4k <= nesadapter->free_4kpbl)
1966                                 use_4k_pbls = 1;
1967                 } else if (pg_cnt <= 2048) {
1968                         if (((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) &&
1969                             (nesadapter->free_4kpbl > (nesadapter->max_4kpbl >> 1))) {
1970                                 use_4k_pbls = 1;
1971                         } else if ((pbl_count_256 + 1) <= nesadapter->free_256pbl) {
1972                                 use_256_pbls = 1;
1973                                 use_two_level = 1;
1974                         } else if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
1975                                 use_4k_pbls = 1;
1976                         }
1977                 } else {
1978                         if ((pbl_count_4k + 1) <= nesadapter->free_4kpbl)
1979                                 use_4k_pbls = 1;
1980                 }
1981
1982                 if (use_256_pbls) {
1983                         pbl_count = pbl_count_256;
1984                         nesadapter->free_256pbl -= pbl_count + use_two_level;
1985                 } else if (use_4k_pbls) {
1986                         pbl_count =  pbl_count_4k;
1987                         nesadapter->free_4kpbl -= pbl_count + use_two_level;
1988                 } else {
1989                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1990                         nes_debug(NES_DBG_MR, "Out of Pbls\n");
1991                         nes_free_cqp_request(nesdev, cqp_request);
1992                         return -ENOMEM;
1993                 }
1994
1995                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
1996         }
1997
1998         if (use_256_pbls && use_two_level) {
1999                 if (root_256(nesdev, root_vpbl, &new_root, pbl_count_4k) == 1) {
2000                         if (new_root.pbl_pbase != 0)
2001                                 root_vpbl = &new_root;
2002                 } else {
2003                         spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2004                         nesadapter->free_256pbl += pbl_count_256 + use_two_level;
2005                         use_256_pbls = 0;
2006
2007                         if (pbl_count_4k == 1)
2008                                 use_two_level = 0;
2009                         pbl_count = pbl_count_4k;
2010
2011                         if ((pbl_count_4k + use_two_level) <= nesadapter->free_4kpbl) {
2012                                 nesadapter->free_4kpbl -= pbl_count + use_two_level;
2013                                 use_4k_pbls = 1;
2014                         }
2015                         spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2016
2017                         if (use_4k_pbls == 0)
2018                                 return -ENOMEM;
2019                 }
2020         }
2021
2022         opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
2023                                         NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
2024         if (acc & IB_ACCESS_LOCAL_WRITE)
2025                 opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
2026         if (acc & IB_ACCESS_REMOTE_WRITE)
2027                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
2028         if (acc & IB_ACCESS_REMOTE_READ)
2029                 opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
2030         if (acc & IB_ACCESS_MW_BIND)
2031                 opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
2032
2033         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2034         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
2035         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
2036         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
2037
2038         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
2039                         cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
2040         cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
2041                         cpu_to_le32(nespd->pd_id & 0x00007fff);
2042         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
2043
2044         if (pbl_count == 0) {
2045                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
2046         } else {
2047                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
2048                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
2049                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX, (pg_cnt * 8));
2050
2051                 if (use_4k_pbls)
2052                         cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
2053         }
2054         barrier();
2055
2056         atomic_set(&cqp_request->refcount, 2);
2057         nes_post_cqp_request(nesdev, cqp_request);
2058
2059         /* Wait for CQP */
2060         ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
2061                         NES_EVENT_TIMEOUT);
2062         nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
2063                         " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2064                         stag, ret, cqp_request->major_code, cqp_request->minor_code);
2065         major_code = cqp_request->major_code;
2066         nes_put_cqp_request(nesdev, cqp_request);
2067
2068         if ((!ret || major_code) && pbl_count != 0) {
2069                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2070                 if (use_256_pbls)
2071                         nesadapter->free_256pbl += pbl_count + use_two_level;
2072                 else if (use_4k_pbls)
2073                         nesadapter->free_4kpbl += pbl_count + use_two_level;
2074                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2075         }
2076         if (new_root.pbl_pbase)
2077                 pci_free_consistent(nesdev->pcidev, 512, new_root.pbl_vbase,
2078                                     new_root.pbl_pbase);
2079
2080         if (!ret)
2081                 return -ETIME;
2082         else if (major_code)
2083                 return -EIO;
2084
2085         *actual_pbl_cnt = pbl_count + use_two_level;
2086         *used_4k_pbls = use_4k_pbls;
2087         return 0;
2088 }
2089
2090
2091 /**
2092  * nes_reg_phys_mr
2093  */
2094 static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
2095                 struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
2096                 u64 * iova_start)
2097 {
2098         u64 region_length;
2099         struct nes_pd *nespd = to_nespd(ib_pd);
2100         struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
2101         struct nes_device *nesdev = nesvnic->nesdev;
2102         struct nes_adapter *nesadapter = nesdev->nesadapter;
2103         struct nes_mr *nesmr;
2104         struct ib_mr *ibmr;
2105         struct nes_vpbl vpbl;
2106         struct nes_root_vpbl root_vpbl;
2107         u32 stag;
2108         u32 i;
2109         unsigned long mask;
2110         u32 stag_index = 0;
2111         u32 next_stag_index = 0;
2112         u32 driver_key = 0;
2113         u32 root_pbl_index = 0;
2114         u32 cur_pbl_index = 0;
2115         int err = 0, pbl_depth = 0;
2116         int ret = 0;
2117         u16 pbl_count = 0;
2118         u8 single_page = 1;
2119         u8 stag_key = 0;
2120
2121         pbl_depth = 0;
2122         region_length = 0;
2123         vpbl.pbl_vbase = NULL;
2124         root_vpbl.pbl_vbase = NULL;
2125         root_vpbl.pbl_pbase = 0;
2126
2127         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2128         stag_key = (u8)next_stag_index;
2129
2130         driver_key = 0;
2131
2132         next_stag_index >>= 8;
2133         next_stag_index %= nesadapter->max_mr;
2134         if (num_phys_buf > (1024*512)) {
2135                 return ERR_PTR(-E2BIG);
2136         }
2137
2138         if ((buffer_list[0].addr ^ *iova_start) & ~PAGE_MASK)
2139                 return ERR_PTR(-EINVAL);
2140
2141         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
2142                         &stag_index, &next_stag_index);
2143         if (err) {
2144                 return ERR_PTR(err);
2145         }
2146
2147         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2148         if (!nesmr) {
2149                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2150                 return ERR_PTR(-ENOMEM);
2151         }
2152
2153         for (i = 0; i < num_phys_buf; i++) {
2154
2155                 if ((i & 0x01FF) == 0) {
2156                         if (root_pbl_index == 1) {
2157                                 /* Allocate the root PBL */
2158                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
2159                                                 &root_vpbl.pbl_pbase);
2160                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2161                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2162                                 if (!root_vpbl.pbl_vbase) {
2163                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2164                                                         vpbl.pbl_pbase);
2165                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2166                                         kfree(nesmr);
2167                                         return ERR_PTR(-ENOMEM);
2168                                 }
2169                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
2170                                 if (!root_vpbl.leaf_vpbl) {
2171                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2172                                                         root_vpbl.pbl_pbase);
2173                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2174                                                         vpbl.pbl_pbase);
2175                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2176                                         kfree(nesmr);
2177                                         return ERR_PTR(-ENOMEM);
2178                                 }
2179                                 root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
2180                                 root_vpbl.pbl_vbase[0].pa_high =
2181                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2182                                 root_vpbl.leaf_vpbl[0] = vpbl;
2183                         }
2184                         /* Allocate a 4K buffer for the PBL */
2185                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2186                                         &vpbl.pbl_pbase);
2187                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
2188                                         vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
2189                         if (!vpbl.pbl_vbase) {
2190                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2191                                 ibmr = ERR_PTR(-ENOMEM);
2192                                 kfree(nesmr);
2193                                 goto reg_phys_err;
2194                         }
2195                         /* Fill in the root table */
2196                         if (1 <= root_pbl_index) {
2197                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2198                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2199                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2200                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2201                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2202                         }
2203                         root_pbl_index++;
2204                         cur_pbl_index = 0;
2205                 }
2206
2207                 mask = !buffer_list[i].size;
2208                 if (i != 0)
2209                         mask |= buffer_list[i].addr;
2210                 if (i != num_phys_buf - 1)
2211                         mask |= buffer_list[i].addr + buffer_list[i].size;
2212
2213                 if (mask & ~PAGE_MASK) {
2214                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2215                         nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
2216                         ibmr = ERR_PTR(-EINVAL);
2217                         kfree(nesmr);
2218                         goto reg_phys_err;
2219                 }
2220
2221                 region_length += buffer_list[i].size;
2222                 if ((i != 0) && (single_page)) {
2223                         if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
2224                                 single_page = 0;
2225                 }
2226                 vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr & PAGE_MASK);
2227                 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
2228                                 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
2229         }
2230
2231         stag = stag_index << 8;
2232         stag |= driver_key;
2233         stag += (u32)stag_key;
2234
2235         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
2236                         " length = 0x%016lX, index = 0x%08X\n",
2237                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
2238
2239         /* Make the leaf PBL the root if only one PBL */
2240         if (root_pbl_index == 1) {
2241                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2242         }
2243
2244         if (single_page) {
2245                 pbl_count = 0;
2246         } else {
2247                 pbl_count = root_pbl_index;
2248         }
2249         ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
2250                         buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start,
2251                         &nesmr->pbls_used, &nesmr->pbl_4k);
2252
2253         if (ret == 0) {
2254                 nesmr->ibmr.rkey = stag;
2255                 nesmr->ibmr.lkey = stag;
2256                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2257                 ibmr = &nesmr->ibmr;
2258         } else {
2259                 kfree(nesmr);
2260                 ibmr = ERR_PTR(-ENOMEM);
2261         }
2262
2263         reg_phys_err:
2264         /* free the resources */
2265         if (root_pbl_index == 1) {
2266                 /* single PBL case */
2267                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
2268         } else {
2269                 for (i=0; i<root_pbl_index; i++) {
2270                         pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
2271                                         root_vpbl.leaf_vpbl[i].pbl_pbase);
2272                 }
2273                 kfree(root_vpbl.leaf_vpbl);
2274                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2275                                 root_vpbl.pbl_pbase);
2276         }
2277
2278         return ibmr;
2279 }
2280
2281
2282 /**
2283  * nes_get_dma_mr
2284  */
2285 static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
2286 {
2287         struct ib_phys_buf bl;
2288         u64 kva = 0;
2289
2290         nes_debug(NES_DBG_MR, "\n");
2291
2292         bl.size = (u64)0xffffffffffULL;
2293         bl.addr = 0;
2294         return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
2295 }
2296
2297
2298 /**
2299  * nes_reg_user_mr
2300  */
2301 static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2302                 u64 virt, int acc, struct ib_udata *udata)
2303 {
2304         u64 iova_start;
2305         __le64 *pbl;
2306         u64 region_length;
2307         dma_addr_t last_dma_addr = 0;
2308         dma_addr_t first_dma_addr = 0;
2309         struct nes_pd *nespd = to_nespd(pd);
2310         struct nes_vnic *nesvnic = to_nesvnic(pd->device);
2311         struct nes_device *nesdev = nesvnic->nesdev;
2312         struct nes_adapter *nesadapter = nesdev->nesadapter;
2313         struct ib_mr *ibmr = ERR_PTR(-EINVAL);
2314         struct ib_umem_chunk *chunk;
2315         struct nes_ucontext *nes_ucontext;
2316         struct nes_pbl *nespbl;
2317         struct nes_mr *nesmr;
2318         struct ib_umem *region;
2319         struct nes_mem_reg_req req;
2320         struct nes_vpbl vpbl;
2321         struct nes_root_vpbl root_vpbl;
2322         int nmap_index, page_index;
2323         int page_count = 0;
2324         int err, pbl_depth = 0;
2325         int chunk_pages;
2326         int ret;
2327         u32 stag;
2328         u32 stag_index = 0;
2329         u32 next_stag_index;
2330         u32 driver_key;
2331         u32 root_pbl_index = 0;
2332         u32 cur_pbl_index = 0;
2333         u32 skip_pages;
2334         u16 pbl_count;
2335         u8 single_page = 1;
2336         u8 stag_key;
2337
2338         region = ib_umem_get(pd->uobject->context, start, length, acc, 0);
2339         if (IS_ERR(region)) {
2340                 return (struct ib_mr *)region;
2341         }
2342
2343         nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
2344                         " offset = %u, page size = %u.\n",
2345                         (unsigned long int)start, (unsigned long int)virt, (u32)length,
2346                         region->offset, region->page_size);
2347
2348         skip_pages = ((u32)region->offset) >> 12;
2349
2350         if (ib_copy_from_udata(&req, udata, sizeof(req)))
2351                 return ERR_PTR(-EFAULT);
2352         nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
2353
2354         switch (req.reg_type) {
2355                 case IWNES_MEMREG_TYPE_MEM:
2356                         pbl_depth = 0;
2357                         region_length = 0;
2358                         vpbl.pbl_vbase = NULL;
2359                         root_vpbl.pbl_vbase = NULL;
2360                         root_vpbl.pbl_pbase = 0;
2361
2362                         get_random_bytes(&next_stag_index, sizeof(next_stag_index));
2363                         stag_key = (u8)next_stag_index;
2364
2365                         driver_key = next_stag_index & 0x70000000;
2366
2367                         next_stag_index >>= 8;
2368                         next_stag_index %= nesadapter->max_mr;
2369
2370                         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
2371                                         nesadapter->max_mr, &stag_index, &next_stag_index);
2372                         if (err) {
2373                                 ib_umem_release(region);
2374                                 return ERR_PTR(err);
2375                         }
2376
2377                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2378                         if (!nesmr) {
2379                                 ib_umem_release(region);
2380                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2381                                 return ERR_PTR(-ENOMEM);
2382                         }
2383                         nesmr->region = region;
2384
2385                         list_for_each_entry(chunk, &region->chunk_list, list) {
2386                                 nes_debug(NES_DBG_MR, "Chunk: nents = %u, nmap = %u .\n",
2387                                                 chunk->nents, chunk->nmap);
2388                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2389                                         if (sg_dma_address(&chunk->page_list[nmap_index]) & ~PAGE_MASK) {
2390                                                 ib_umem_release(region);
2391                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2392                                                 nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
2393                                                                 (unsigned int) sg_dma_address(&chunk->page_list[nmap_index]));
2394                                                 ibmr = ERR_PTR(-EINVAL);
2395                                                 kfree(nesmr);
2396                                                 goto reg_user_mr_err;
2397                                         }
2398
2399                                         if (!sg_dma_len(&chunk->page_list[nmap_index])) {
2400                                                 ib_umem_release(region);
2401                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2402                                                                 stag_index);
2403                                                 nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
2404                                                 ibmr = ERR_PTR(-EINVAL);
2405                                                 kfree(nesmr);
2406                                                 goto reg_user_mr_err;
2407                                         }
2408
2409                                         region_length += sg_dma_len(&chunk->page_list[nmap_index]);
2410                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2411                                         region_length -= skip_pages << 12;
2412                                         for (page_index=skip_pages; page_index < chunk_pages; page_index++) {
2413                                                 skip_pages = 0;
2414                                                 if ((page_count!=0)&&(page_count<<12)-(region->offset&(4096-1))>=region->length)
2415                                                         goto enough_pages;
2416                                                 if ((page_count&0x01FF) == 0) {
2417                                                         if (page_count >= 1024 * 512) {
2418                                                                 ib_umem_release(region);
2419                                                                 nes_free_resource(nesadapter,
2420                                                                                 nesadapter->allocated_mrs, stag_index);
2421                                                                 kfree(nesmr);
2422                                                                 ibmr = ERR_PTR(-E2BIG);
2423                                                                 goto reg_user_mr_err;
2424                                                         }
2425                                                         if (root_pbl_index == 1) {
2426                                                                 root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
2427                                                                                 8192, &root_vpbl.pbl_pbase);
2428                                                                 nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
2429                                                                                 root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
2430                                                                 if (!root_vpbl.pbl_vbase) {
2431                                                                         ib_umem_release(region);
2432                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2433                                                                                         vpbl.pbl_pbase);
2434                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2435                                                                                         stag_index);
2436                                                                         kfree(nesmr);
2437                                                                         ibmr = ERR_PTR(-ENOMEM);
2438                                                                         goto reg_user_mr_err;
2439                                                                 }
2440                                                                 root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
2441                                                                                 GFP_KERNEL);
2442                                                                 if (!root_vpbl.leaf_vpbl) {
2443                                                                         ib_umem_release(region);
2444                                                                         pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2445                                                                                         root_vpbl.pbl_pbase);
2446                                                                         pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2447                                                                                         vpbl.pbl_pbase);
2448                                                                         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2449                                                                                         stag_index);
2450                                                                         kfree(nesmr);
2451                                                                         ibmr = ERR_PTR(-ENOMEM);
2452                                                                         goto reg_user_mr_err;
2453                                                                 }
2454                                                                 root_vpbl.pbl_vbase[0].pa_low =
2455                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2456                                                                 root_vpbl.pbl_vbase[0].pa_high =
2457                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
2458                                                                 root_vpbl.leaf_vpbl[0] = vpbl;
2459                                                         }
2460                                                         vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
2461                                                                         &vpbl.pbl_pbase);
2462                                                         nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
2463                                                                         vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
2464                                                         if (!vpbl.pbl_vbase) {
2465                                                                 ib_umem_release(region);
2466                                                                 nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
2467                                                                 ibmr = ERR_PTR(-ENOMEM);
2468                                                                 kfree(nesmr);
2469                                                                 goto reg_user_mr_err;
2470                                                         }
2471                                                         if (1 <= root_pbl_index) {
2472                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_low =
2473                                                                                 cpu_to_le32((u32)vpbl.pbl_pbase);
2474                                                                 root_vpbl.pbl_vbase[root_pbl_index].pa_high =
2475                                                                                 cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
2476                                                                 root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
2477                                                         }
2478                                                         root_pbl_index++;
2479                                                         cur_pbl_index = 0;
2480                                                 }
2481                                                 if (single_page) {
2482                                                         if (page_count != 0) {
2483                                                                 if ((last_dma_addr+4096) !=
2484                                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2485                                                                                 (page_index*4096)))
2486                                                                         single_page = 0;
2487                                                                 last_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2488                                                                                 (page_index*4096);
2489                                                         } else {
2490                                                                 first_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
2491                                                                                 (page_index*4096);
2492                                                                 last_dma_addr = first_dma_addr;
2493                                                         }
2494                                                 }
2495
2496                                                 vpbl.pbl_vbase[cur_pbl_index].pa_low =
2497                                                                 cpu_to_le32((u32)(sg_dma_address(&chunk->page_list[nmap_index])+
2498                                                                 (page_index*4096)));
2499                                                 vpbl.pbl_vbase[cur_pbl_index].pa_high =
2500                                                                 cpu_to_le32((u32)((((u64)(sg_dma_address(&chunk->page_list[nmap_index])+
2501                                                                 (page_index*4096))) >> 32)));
2502                                                 cur_pbl_index++;
2503                                                 page_count++;
2504                                         }
2505                                 }
2506                         }
2507                         enough_pages:
2508                         nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
2509                                         " stag_key=0x%08x\n",
2510                                         stag_index, driver_key, stag_key);
2511                         stag = stag_index << 8;
2512                         stag |= driver_key;
2513                         stag += (u32)stag_key;
2514
2515                         iova_start = virt;
2516                         /* Make the leaf PBL the root if only one PBL */
2517                         if (root_pbl_index == 1) {
2518                                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;
2519                         }
2520
2521                         if (single_page) {
2522                                 pbl_count = 0;
2523                         } else {
2524                                 pbl_count = root_pbl_index;
2525                                 first_dma_addr = 0;
2526                         }
2527                         nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
2528                                         " index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
2529                                         stag, (unsigned int)iova_start,
2530                                         (unsigned int)region_length, stag_index,
2531                                         (unsigned long long)region->length, pbl_count);
2532                         ret = nes_reg_mr(nesdev, nespd, stag, region->length, &root_vpbl,
2533                                          first_dma_addr, pbl_count, (u16)cur_pbl_index, acc,
2534                                          &iova_start, &nesmr->pbls_used, &nesmr->pbl_4k);
2535
2536                         nes_debug(NES_DBG_MR, "ret=%d\n", ret);
2537
2538                         if (ret == 0) {
2539                                 nesmr->ibmr.rkey = stag;
2540                                 nesmr->ibmr.lkey = stag;
2541                                 nesmr->mode = IWNES_MEMREG_TYPE_MEM;
2542                                 ibmr = &nesmr->ibmr;
2543                         } else {
2544                                 ib_umem_release(region);
2545                                 kfree(nesmr);
2546                                 ibmr = ERR_PTR(-ENOMEM);
2547                         }
2548
2549                         reg_user_mr_err:
2550                         /* free the resources */
2551                         if (root_pbl_index == 1) {
2552                                 pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
2553                                                 vpbl.pbl_pbase);
2554                         } else {
2555                                 for (page_index=0; page_index<root_pbl_index; page_index++) {
2556                                         pci_free_consistent(nesdev->pcidev, 4096,
2557                                                         root_vpbl.leaf_vpbl[page_index].pbl_vbase,
2558                                                         root_vpbl.leaf_vpbl[page_index].pbl_pbase);
2559                                 }
2560                                 kfree(root_vpbl.leaf_vpbl);
2561                                 pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
2562                                                 root_vpbl.pbl_pbase);
2563                         }
2564
2565                         nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
2566
2567                         return ibmr;
2568                 case IWNES_MEMREG_TYPE_QP:
2569                 case IWNES_MEMREG_TYPE_CQ:
2570                         nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
2571                         if (!nespbl) {
2572                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
2573                                 ib_umem_release(region);
2574                                 return ERR_PTR(-ENOMEM);
2575                         }
2576                         nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
2577                         if (!nesmr) {
2578                                 ib_umem_release(region);
2579                                 kfree(nespbl);
2580                                 nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
2581                                 return ERR_PTR(-ENOMEM);
2582                         }
2583                         nesmr->region = region;
2584                         nes_ucontext = to_nesucontext(pd->uobject->context);
2585                         pbl_depth = region->length >> 12;
2586                         pbl_depth += (region->length & (4096-1)) ? 1 : 0;
2587                         nespbl->pbl_size = pbl_depth*sizeof(u64);
2588                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2589                                 nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
2590                         } else {
2591                                 nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
2592                         }
2593
2594                         nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
2595                                         nespbl->pbl_size, pbl_depth);
2596                         pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
2597                                         &nespbl->pbl_pbase);
2598                         if (!pbl) {
2599                                 ib_umem_release(region);
2600                                 kfree(nesmr);
2601                                 kfree(nespbl);
2602                                 nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
2603                                 return ERR_PTR(-ENOMEM);
2604                         }
2605
2606                         nespbl->pbl_vbase = (u64 *)pbl;
2607                         nespbl->user_base = start;
2608                         nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%lx,"
2609                                         " pbl_vbase=%p user_base=0x%lx\n",
2610                                   nespbl->pbl_size, (unsigned long) nespbl->pbl_pbase,
2611                                   (void *) nespbl->pbl_vbase, nespbl->user_base);
2612
2613                         list_for_each_entry(chunk, &region->chunk_list, list) {
2614                                 for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
2615                                         chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
2616                                         chunk_pages += (sg_dma_len(&chunk->page_list[nmap_index]) & (4096-1)) ? 1 : 0;
2617                                         nespbl->page = sg_page(&chunk->page_list[0]);
2618                                         for (page_index=0; page_index<chunk_pages; page_index++) {
2619                                                 ((__le32 *)pbl)[0] = cpu_to_le32((u32)
2620                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2621                                                                 (page_index*4096)));
2622                                                 ((__le32 *)pbl)[1] = cpu_to_le32(((u64)
2623                                                                 (sg_dma_address(&chunk->page_list[nmap_index])+
2624                                                                 (page_index*4096)))>>32);
2625                                                 nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
2626                                                                 (unsigned long long)*pbl,
2627                                                                 le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
2628                                                 pbl++;
2629                                         }
2630                                 }
2631                         }
2632                         if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
2633                                 list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
2634                         } else {
2635                                 list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
2636                         }
2637                         nesmr->ibmr.rkey = -1;
2638                         nesmr->ibmr.lkey = -1;
2639                         nesmr->mode = req.reg_type;
2640                         return &nesmr->ibmr;
2641         }
2642
2643         return ERR_PTR(-ENOSYS);
2644 }
2645
2646
2647 /**
2648  * nes_dereg_mr
2649  */
2650 static int nes_dereg_mr(struct ib_mr *ib_mr)
2651 {
2652         struct nes_mr *nesmr = to_nesmr(ib_mr);
2653         struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
2654         struct nes_device *nesdev = nesvnic->nesdev;
2655         struct nes_adapter *nesadapter = nesdev->nesadapter;
2656         struct nes_hw_cqp_wqe *cqp_wqe;
2657         struct nes_cqp_request *cqp_request;
2658         unsigned long flags;
2659         int ret;
2660         u16 major_code;
2661         u16 minor_code;
2662
2663         if (nesmr->region) {
2664                 ib_umem_release(nesmr->region);
2665         }
2666         if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
2667                 kfree(nesmr);
2668                 return 0;
2669         }
2670
2671         /* Deallocate the region with the adapter */
2672
2673         cqp_request = nes_get_cqp_request(nesdev);
2674         if (cqp_request == NULL) {
2675                 nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
2676                 return -ENOMEM;
2677         }
2678         cqp_request->waiting = 1;
2679         cqp_wqe = &cqp_request->cqp_wqe;
2680
2681         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2682         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2683                         NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
2684                         NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
2685         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
2686
2687         atomic_set(&cqp_request->refcount, 2);
2688         nes_post_cqp_request(nesdev, cqp_request);
2689
2690         /* Wait for CQP */
2691         nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
2692         ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2693                         NES_EVENT_TIMEOUT);
2694         nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
2695                         " CQP Major:Minor codes = 0x%04X:0x%04X\n",
2696                         ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
2697
2698         major_code = cqp_request->major_code;
2699         minor_code = cqp_request->minor_code;
2700
2701         nes_put_cqp_request(nesdev, cqp_request);
2702
2703         if (!ret) {
2704                 nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
2705                                 " ib_mr=%p, rkey = 0x%08X\n",
2706                                 ib_mr, ib_mr->rkey);
2707                 return -ETIME;
2708         } else if (major_code) {
2709                 nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
2710                                 " to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
2711                                 major_code, minor_code, ib_mr, ib_mr->rkey);
2712                 return -EIO;
2713         }
2714
2715         if (nesmr->pbls_used != 0) {
2716                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
2717                 if (nesmr->pbl_4k) {
2718                         nesadapter->free_4kpbl += nesmr->pbls_used;
2719                         if (nesadapter->free_4kpbl > nesadapter->max_4kpbl)
2720                                 printk(KERN_ERR PFX "free 4KB PBLs(%u) has "
2721                                         "exceeded the max(%u)\n",
2722                                         nesadapter->free_4kpbl,
2723                                         nesadapter->max_4kpbl);
2724                 } else {
2725                         nesadapter->free_256pbl += nesmr->pbls_used;
2726                         if (nesadapter->free_256pbl > nesadapter->max_256pbl)
2727                                 printk(KERN_ERR PFX "free 256B PBLs(%u) has "
2728                                         "exceeded the max(%u)\n",
2729                                         nesadapter->free_256pbl,
2730                                         nesadapter->max_256pbl);
2731                 }
2732                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
2733         }
2734         nes_free_resource(nesadapter, nesadapter->allocated_mrs,
2735                         (ib_mr->rkey & 0x0fffff00) >> 8);
2736
2737         kfree(nesmr);
2738
2739         return 0;
2740 }
2741
2742
2743 /**
2744  * show_rev
2745  */
2746 static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
2747                         char *buf)
2748 {
2749         struct nes_ib_device *nesibdev =
2750                         container_of(dev, struct nes_ib_device, ibdev.dev);
2751         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2752
2753         nes_debug(NES_DBG_INIT, "\n");
2754         return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
2755 }
2756
2757
2758 /**
2759  * show_fw_ver
2760  */
2761 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
2762                            char *buf)
2763 {
2764         struct nes_ib_device *nesibdev =
2765                         container_of(dev, struct nes_ib_device, ibdev.dev);
2766         struct nes_vnic *nesvnic = nesibdev->nesvnic;
2767
2768         nes_debug(NES_DBG_INIT, "\n");
2769         return sprintf(buf, "%u.%u\n",
2770                 (nesvnic->nesdev->nesadapter->firmware_version >> 16),
2771                 (nesvnic->nesdev->nesadapter->firmware_version & 0x000000ff));
2772 }
2773
2774
2775 /**
2776  * show_hca
2777  */
2778 static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
2779                         char *buf)
2780 {
2781         nes_debug(NES_DBG_INIT, "\n");
2782         return sprintf(buf, "NES020\n");
2783 }
2784
2785
2786 /**
2787  * show_board
2788  */
2789 static ssize_t show_board(struct device *dev, struct device_attribute *attr,
2790                           char *buf)
2791 {
2792         nes_debug(NES_DBG_INIT, "\n");
2793         return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
2794 }
2795
2796
2797 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
2798 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
2799 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
2800 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
2801
2802 static struct device_attribute *nes_dev_attributes[] = {
2803         &dev_attr_hw_rev,
2804         &dev_attr_fw_ver,
2805         &dev_attr_hca_type,
2806         &dev_attr_board_id
2807 };
2808
2809
2810 /**
2811  * nes_query_qp
2812  */
2813 static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2814                 int attr_mask, struct ib_qp_init_attr *init_attr)
2815 {
2816         struct nes_qp *nesqp = to_nesqp(ibqp);
2817
2818         nes_debug(NES_DBG_QP, "\n");
2819
2820         attr->qp_access_flags = 0;
2821         attr->cap.max_send_wr = nesqp->hwqp.sq_size;
2822         attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
2823         attr->cap.max_recv_sge = 1;
2824         if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA)
2825                 attr->cap.max_inline_data = 0;
2826         else
2827                 attr->cap.max_inline_data = 64;
2828
2829         init_attr->event_handler = nesqp->ibqp.event_handler;
2830         init_attr->qp_context = nesqp->ibqp.qp_context;
2831         init_attr->send_cq = nesqp->ibqp.send_cq;
2832         init_attr->recv_cq = nesqp->ibqp.recv_cq;
2833         init_attr->srq = nesqp->ibqp.srq = nesqp->ibqp.srq;
2834         init_attr->cap = attr->cap;
2835
2836         return 0;
2837 }
2838
2839
2840 /**
2841  * nes_hw_modify_qp
2842  */
2843 int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
2844                 u32 next_iwarp_state, u32 termlen, u32 wait_completion)
2845 {
2846         struct nes_hw_cqp_wqe *cqp_wqe;
2847         /* struct iw_cm_id *cm_id = nesqp->cm_id; */
2848         /* struct iw_cm_event cm_event; */
2849         struct nes_cqp_request *cqp_request;
2850         int ret;
2851         u16 major_code;
2852
2853         nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
2854                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
2855
2856         cqp_request = nes_get_cqp_request(nesdev);
2857         if (cqp_request == NULL) {
2858                 nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
2859                 return -ENOMEM;
2860         }
2861         if (wait_completion) {
2862                 cqp_request->waiting = 1;
2863         } else {
2864                 cqp_request->waiting = 0;
2865         }
2866         cqp_wqe = &cqp_request->cqp_wqe;
2867
2868         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
2869                         NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
2870         nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
2871                         next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
2872         nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
2873         set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
2874         set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
2875
2876         /* If sending a terminate message, fill in the length (in words) */
2877         if (((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) == NES_CQP_QP_IWARP_STATE_TERMINATE) &&
2878             !(next_iwarp_state & NES_CQP_QP_TERM_DONT_SEND_TERM_MSG)) {
2879                 termlen = ((termlen + 3) >> 2) << NES_CQP_OP_TERMLEN_SHIFT;
2880                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_NEW_MSS_IDX, termlen);
2881         }
2882
2883         atomic_set(&cqp_request->refcount, 2);
2884         nes_post_cqp_request(nesdev, cqp_request);
2885
2886         /* Wait for CQP */
2887         if (wait_completion) {
2888                 /* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
2889                                 nesqp->hwqp.qp_id); */
2890                 ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
2891                                 NES_EVENT_TIMEOUT);
2892                 nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
2893                                 "CQP Major:Minor codes = 0x%04X:0x%04X.\n",
2894                                 nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
2895                 major_code = cqp_request->major_code;
2896                 if (major_code) {
2897                         nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
2898                                         "CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
2899                                         nesqp->hwqp.qp_id, cqp_request->major_code,
2900                                         cqp_request->minor_code, next_iwarp_state);
2901                 }
2902
2903                 nes_put_cqp_request(nesdev, cqp_request);
2904
2905                 if (!ret)
2906                         return -ETIME;
2907                 else if (major_code)
2908                         return -EIO;
2909                 else
2910                         return 0;
2911         } else {
2912                 return 0;
2913         }
2914 }
2915
2916
2917 /**
2918  * nes_modify_qp
2919  */
2920 int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2921                 int attr_mask, struct ib_udata *udata)
2922 {
2923         struct nes_qp *nesqp = to_nesqp(ibqp);
2924         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
2925         struct nes_device *nesdev = nesvnic->nesdev;
2926         /* u32 cqp_head; */
2927         /* u32 counter; */
2928         u32 next_iwarp_state = 0;
2929         int err;
2930         unsigned long qplockflags;
2931         int ret;
2932         u16 original_last_aeq;
2933         u8 issue_modify_qp = 0;
2934         u8 issue_disconnect = 0;
2935         u8 dont_wait = 0;
2936
2937         nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
2938                         " iwarp_state=0x%X, refcount=%d\n",
2939                         nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
2940                         nesqp->iwarp_state, atomic_read(&nesqp->refcount));
2941
2942         spin_lock_irqsave(&nesqp->lock, qplockflags);
2943
2944         nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
2945                         " QP Access Flags=0x%X, attr_mask = 0x%0x\n",
2946                         nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
2947                         nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
2948
2949         if (attr_mask & IB_QP_STATE) {
2950                 switch (attr->qp_state) {
2951                         case IB_QPS_INIT:
2952                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
2953                                                 nesqp->hwqp.qp_id);
2954                                 if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2955                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2956                                         return -EINVAL;
2957                                 }
2958                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2959                                 issue_modify_qp = 1;
2960                                 break;
2961                         case IB_QPS_RTR:
2962                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
2963                                                 nesqp->hwqp.qp_id);
2964                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
2965                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2966                                         return -EINVAL;
2967                                 }
2968                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
2969                                 issue_modify_qp = 1;
2970                                 break;
2971                         case IB_QPS_RTS:
2972                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
2973                                                 nesqp->hwqp.qp_id);
2974                                 if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
2975                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2976                                         return -EINVAL;
2977                                 }
2978                                 if (nesqp->cm_id == NULL) {
2979                                         nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
2980                                                         nesqp->hwqp.qp_id );
2981                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2982                                         return -EINVAL;
2983                                 }
2984                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
2985                                 if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
2986                                         next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
2987                                                         NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
2988                                 issue_modify_qp = 1;
2989                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
2990                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
2991                                 nesqp->hte_added = 1;
2992                                 break;
2993                         case IB_QPS_SQD:
2994                                 issue_modify_qp = 1;
2995                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
2996                                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
2997                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
2998                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
2999                                         return 0;
3000                                 } else {
3001                                         if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
3002                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3003                                                                 " ignored due to current iWARP state\n",
3004                                                                 nesqp->hwqp.qp_id);
3005                                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3006                                                 return -EINVAL;
3007                                         }
3008                                         if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
3009                                                 nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
3010                                                                 " already done based on hw state.\n",
3011                                                                 nesqp->hwqp.qp_id);
3012                                                 issue_modify_qp = 0;
3013                                         }
3014                                         switch (nesqp->hw_iwarp_state) {
3015                                                 case NES_AEQE_IWARP_STATE_CLOSING:
3016                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3017                                                 case NES_AEQE_IWARP_STATE_TERMINATE:
3018                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3019                                                         break;
3020                                                 case NES_AEQE_IWARP_STATE_ERROR:
3021                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3022                                                         break;
3023                                                 default:
3024                                                         next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
3025                                                         nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
3026                                                         break;
3027                                         }
3028                                 }
3029                                 break;
3030                         case IB_QPS_SQE:
3031                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
3032                                                 nesqp->hwqp.qp_id);
3033                                 if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
3034                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3035                                         return -EINVAL;
3036                                 }
3037                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3038                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
3039                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
3040                                 issue_modify_qp = 1;
3041                                 break;
3042                         case IB_QPS_ERR:
3043                         case IB_QPS_RESET:
3044                                 if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
3045                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3046                                         return -EINVAL;
3047                                 }
3048                                 nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
3049                                                 nesqp->hwqp.qp_id);
3050                                 if (nesqp->term_flags)
3051                                         del_timer(&nesqp->terminate_timer);
3052
3053                                 next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
3054                                 /* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
3055                                         if (nesqp->hte_added) {
3056                                                 nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
3057                                                 next_iwarp_state |= NES_CQP_QP_DEL_HTE;
3058                                                 nesqp->hte_added = 0;
3059                                         }
3060                                 if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
3061                                                 (nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
3062                                         next_iwarp_state |= NES_CQP_QP_RESET;
3063                                 } else {
3064                                         nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
3065                                                         nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
3066                                         dont_wait = 1;
3067                                 }
3068                                 issue_modify_qp = 1;
3069                                 nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
3070                                 break;
3071                         default:
3072                                 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3073                                 return -EINVAL;
3074                                 break;
3075                 }
3076
3077                 nesqp->ibqp_state = attr->qp_state;
3078                 if (((nesqp->iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) ==
3079                                 (u32)NES_CQP_QP_IWARP_STATE_RTS) &&
3080                                 ((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) >
3081                                 (u32)NES_CQP_QP_IWARP_STATE_RTS)) {
3082                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3083                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3084                                         nesqp->iwarp_state);
3085                         issue_disconnect = 1;
3086                 } else {
3087                         nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
3088                         nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
3089                                         nesqp->iwarp_state);
3090                 }
3091         }
3092
3093         if (attr_mask & IB_QP_ACCESS_FLAGS) {
3094                 if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
3095                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3096                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3097                         issue_modify_qp = 1;
3098                 }
3099                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
3100                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
3101                         issue_modify_qp = 1;
3102                 }
3103                 if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
3104                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
3105                         issue_modify_qp = 1;
3106                 }
3107                 if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
3108                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
3109                         issue_modify_qp = 1;
3110                 }
3111
3112                 if (nesqp->user_mode) {
3113                         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
3114                                         NES_QPCONTEXT_MISC_RDMA_READ_EN);
3115                         issue_modify_qp = 1;
3116                 }
3117         }
3118
3119         original_last_aeq = nesqp->last_aeq;
3120         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3121
3122         nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
3123
3124         ret = 0;
3125
3126
3127         if (issue_modify_qp) {
3128                 nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
3129                 ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 0, 1);
3130                 if (ret)
3131                         nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
3132                                         " failed for QP%u.\n",
3133                                         next_iwarp_state, nesqp->hwqp.qp_id);
3134
3135         }
3136
3137         if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
3138                 nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
3139                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3140                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3141                                 original_last_aeq, nesqp->last_aeq);
3142                 if ((!ret) ||
3143                                 ((original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) &&
3144                                 (ret))) {
3145                         if (dont_wait) {
3146                                 if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
3147                                         nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
3148                                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3149                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3150                                                         original_last_aeq, nesqp->last_aeq);
3151                                         /* this one is for the cm_disconnect thread */
3152                                         spin_lock_irqsave(&nesqp->lock, qplockflags);
3153                                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
3154                                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
3155                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3156                                         nes_cm_disconn(nesqp);
3157                                 } else {
3158                                         nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
3159                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3160                                 }
3161                         } else {
3162                                 spin_lock_irqsave(&nesqp->lock, qplockflags);
3163                                 if (nesqp->cm_id) {
3164                                         /* These two are for the timer thread */
3165                                         if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
3166                                                 nesqp->cm_id->add_ref(nesqp->cm_id);
3167                                                 nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3168                                                                 " need ae to finish up, original_last_aeq = 0x%04X."
3169                                                                 " last_aeq = 0x%04X, scheduling timer.\n",
3170                                                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3171                                                                 original_last_aeq, nesqp->last_aeq);
3172                                                 schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
3173                                         }
3174                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3175                                 } else {
3176                                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
3177                                         nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
3178                                                         " need ae to finish up, original_last_aeq = 0x%04X."
3179                                                         " last_aeq = 0x%04X.\n",
3180                                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3181                                                         original_last_aeq, nesqp->last_aeq);
3182                                 }
3183                         }
3184                 } else {
3185                         nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3186                                         " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3187                                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3188                                         original_last_aeq, nesqp->last_aeq);
3189                 }
3190         } else {
3191                 nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
3192                                 " original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
3193                                 nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
3194                                 original_last_aeq, nesqp->last_aeq);
3195         }
3196
3197         err = 0;
3198
3199         nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
3200                         nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
3201
3202         return err;
3203 }
3204
3205
3206 /**
3207  * nes_muticast_attach
3208  */
3209 static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3210 {
3211         nes_debug(NES_DBG_INIT, "\n");
3212         return -ENOSYS;
3213 }
3214
3215
3216 /**
3217  * nes_multicast_detach
3218  */
3219 static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
3220 {
3221         nes_debug(NES_DBG_INIT, "\n");
3222         return -ENOSYS;
3223 }
3224
3225
3226 /**
3227  * nes_process_mad
3228  */
3229 static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
3230                 u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
3231                 struct ib_mad *in_mad, struct ib_mad *out_mad)
3232 {
3233         nes_debug(NES_DBG_INIT, "\n");
3234         return -ENOSYS;
3235 }
3236
3237 static inline void
3238 fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
3239 {
3240         int sge_index;
3241         int total_payload_length = 0;
3242         for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
3243                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3244                         ib_wr->sg_list[sge_index].addr);
3245                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
3246                         ib_wr->sg_list[sge_index].length);
3247                 if (uselkey)
3248                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
3249                                                 (ib_wr->sg_list[sge_index].lkey));
3250                 else
3251                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
3252
3253                 total_payload_length += ib_wr->sg_list[sge_index].length;
3254         }
3255         nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
3256                         total_payload_length);
3257         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3258                                 total_payload_length);
3259 }
3260
3261 /**
3262  * nes_post_send
3263  */
3264 static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
3265                 struct ib_send_wr **bad_wr)
3266 {
3267         u64 u64temp;
3268         unsigned long flags = 0;
3269         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3270         struct nes_device *nesdev = nesvnic->nesdev;
3271         struct nes_qp *nesqp = to_nesqp(ibqp);
3272         struct nes_hw_qp_wqe *wqe;
3273         int err = 0;
3274         u32 qsize = nesqp->hwqp.sq_size;
3275         u32 head;
3276         u32 wqe_misc = 0;
3277         u32 wqe_count = 0;
3278         u32 counter;
3279
3280         if (nesqp->ibqp_state > IB_QPS_RTS) {
3281                 err = -EINVAL;
3282                 goto out;
3283         }
3284
3285         spin_lock_irqsave(&nesqp->lock, flags);
3286
3287         head = nesqp->hwqp.sq_head;
3288
3289         while (ib_wr) {
3290                 /* Check for QP error */
3291                 if (nesqp->term_flags) {
3292                         err = -EINVAL;
3293                         break;
3294                 }
3295
3296                 /* Check for SQ overflow */
3297                 if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
3298                         err = -ENOMEM;
3299                         break;
3300                 }
3301
3302                 wqe = &nesqp->hwqp.sq_vbase[head];
3303                 /* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
3304                                 nesqp->hwqp.qp_id, wqe, head); */
3305                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3306                 u64temp = (u64)(ib_wr->wr_id);
3307                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3308                                         u64temp);
3309                 switch (ib_wr->opcode) {
3310                 case IB_WR_SEND:
3311                 case IB_WR_SEND_WITH_INV:
3312                         if (IB_WR_SEND == ib_wr->opcode) {
3313                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3314                                         wqe_misc = NES_IWARP_SQ_OP_SENDSE;
3315                                 else
3316                                         wqe_misc = NES_IWARP_SQ_OP_SEND;
3317                         } else {
3318                                 if (ib_wr->send_flags & IB_SEND_SOLICITED)
3319                                         wqe_misc = NES_IWARP_SQ_OP_SENDSEINV;
3320                                 else
3321                                         wqe_misc = NES_IWARP_SQ_OP_SENDINV;
3322
3323                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3324                                                     ib_wr->ex.invalidate_rkey);
3325                         }
3326
3327                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3328                                 err = -EINVAL;
3329                                 break;
3330                         }
3331
3332                         if (ib_wr->send_flags & IB_SEND_FENCE)
3333                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3334
3335                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3336                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3337                              (ib_wr->sg_list[0].length <= 64)) {
3338                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3339                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3340                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3341                                                     ib_wr->sg_list[0].length);
3342                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3343                         } else {
3344                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3345                         }
3346
3347                         break;
3348                 case IB_WR_RDMA_WRITE:
3349                         wqe_misc = NES_IWARP_SQ_OP_RDMAW;
3350                         if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3351                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
3352                                           ib_wr->num_sge, nesdev->nesadapter->max_sge);
3353                                 err = -EINVAL;
3354                                 break;
3355                         }
3356
3357                         if (ib_wr->send_flags & IB_SEND_FENCE)
3358                                 wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
3359
3360                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3361                                             ib_wr->wr.rdma.rkey);
3362                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3363                                             ib_wr->wr.rdma.remote_addr);
3364
3365                         if ((ib_wr->send_flags & IB_SEND_INLINE) &&
3366                             ((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
3367                              (ib_wr->sg_list[0].length <= 64)) {
3368                                 memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
3369                                        (void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
3370                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
3371                                                     ib_wr->sg_list[0].length);
3372                                 wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
3373                         } else {
3374                                 fill_wqe_sg_send(wqe, ib_wr, 1);
3375                         }
3376
3377                         wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
3378                                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
3379                         break;
3380                 case IB_WR_RDMA_READ:
3381                 case IB_WR_RDMA_READ_WITH_INV:
3382                         /* iWARP only supports 1 sge for RDMA reads */
3383                         if (ib_wr->num_sge > 1) {
3384                                 nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
3385                                           ib_wr->num_sge);
3386                                 err = -EINVAL;
3387                                 break;
3388                         }
3389                         if (ib_wr->opcode == IB_WR_RDMA_READ) {
3390                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR;
3391                         } else {
3392                                 wqe_misc = NES_IWARP_SQ_OP_RDMAR_LOCINV;
3393                                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_INV_STAG_LOW_IDX,
3394                                                     ib_wr->ex.invalidate_rkey);
3395                         }
3396
3397                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
3398                                             ib_wr->wr.rdma.remote_addr);
3399                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
3400                                             ib_wr->wr.rdma.rkey);
3401                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
3402                                             ib_wr->sg_list->length);
3403                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3404                                             ib_wr->sg_list->addr);
3405                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
3406                                             ib_wr->sg_list->lkey);
3407                         break;
3408                 case IB_WR_LOCAL_INV:
3409                         wqe_misc = NES_IWARP_SQ_OP_LOCINV;
3410                         set_wqe_32bit_value(wqe->wqe_words,
3411                                             NES_IWARP_SQ_LOCINV_WQE_INV_STAG_IDX,
3412                                             ib_wr->ex.invalidate_rkey);
3413                         break;
3414                 case IB_WR_FAST_REG_MR:
3415                 {
3416                         int i;
3417                         int flags = ib_wr->wr.fast_reg.access_flags;
3418                         struct nes_ib_fast_reg_page_list *pnesfrpl =
3419                                 container_of(ib_wr->wr.fast_reg.page_list,
3420                                              struct nes_ib_fast_reg_page_list,
3421                                              ibfrpl);
3422                         u64 *src_page_list = pnesfrpl->ibfrpl.page_list;
3423                         u64 *dst_page_list = pnesfrpl->nes_wqe_pbl.kva;
3424
3425                         if (ib_wr->wr.fast_reg.page_list_len >
3426                             (NES_4K_PBL_CHUNK_SIZE / sizeof(u64))) {
3427                                 nes_debug(NES_DBG_IW_TX, "SQ_FMR: bad page_list_len\n");
3428                                 err = -EINVAL;
3429                                 break;
3430                         }
3431                         wqe_misc = NES_IWARP_SQ_OP_FAST_REG;
3432                         set_wqe_64bit_value(wqe->wqe_words,
3433                                             NES_IWARP_SQ_FMR_WQE_VA_FBO_LOW_IDX,
3434                                             ib_wr->wr.fast_reg.iova_start);
3435                         set_wqe_32bit_value(wqe->wqe_words,
3436                                             NES_IWARP_SQ_FMR_WQE_LENGTH_LOW_IDX,
3437                                             ib_wr->wr.fast_reg.length);
3438                         set_wqe_32bit_value(wqe->wqe_words,
3439                                             NES_IWARP_SQ_FMR_WQE_MR_STAG_IDX,
3440                                             ib_wr->wr.fast_reg.rkey);
3441                         /* Set page size: */
3442                         if (ib_wr->wr.fast_reg.page_shift == 12) {
3443                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_4K;
3444                         } else if (ib_wr->wr.fast_reg.page_shift == 21) {
3445                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_PAGE_SIZE_2M;
3446                         } else {
3447                                 nes_debug(NES_DBG_IW_TX, "Invalid page shift,"
3448                                           " ib_wr=%u, max=1\n", ib_wr->num_sge);
3449                                 err = -EINVAL;
3450                                 break;
3451                         }
3452                         /* Set access_flags */
3453                         wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_READ;
3454                         if (flags & IB_ACCESS_LOCAL_WRITE)
3455                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_LOCAL_WRITE;
3456
3457                         if (flags & IB_ACCESS_REMOTE_WRITE)
3458                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_WRITE;
3459
3460                         if (flags & IB_ACCESS_REMOTE_READ)
3461                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_REMOTE_READ;
3462
3463                         if (flags & IB_ACCESS_MW_BIND)
3464                                 wqe_misc |= NES_IWARP_SQ_FMR_WQE_RIGHTS_ENABLE_WINDOW_BIND;
3465
3466                         /* Fill in PBL info: */
3467                         if (ib_wr->wr.fast_reg.page_list_len >
3468                             pnesfrpl->ibfrpl.max_page_list_len) {
3469                                 nes_debug(NES_DBG_IW_TX, "Invalid page list length,"
3470                                           " ib_wr=%p, value=%u, max=%u\n",
3471                                           ib_wr, ib_wr->wr.fast_reg.page_list_len,
3472                                           pnesfrpl->ibfrpl.max_page_list_len);
3473                                 err = -EINVAL;
3474                                 break;
3475                         }
3476
3477                         set_wqe_64bit_value(wqe->wqe_words,
3478                                             NES_IWARP_SQ_FMR_WQE_PBL_ADDR_LOW_IDX,
3479                                             pnesfrpl->nes_wqe_pbl.paddr);
3480
3481                         set_wqe_32bit_value(wqe->wqe_words,
3482                                             NES_IWARP_SQ_FMR_WQE_PBL_LENGTH_IDX,
3483                                             ib_wr->wr.fast_reg.page_list_len * 8);
3484
3485                         for (i = 0; i < ib_wr->wr.fast_reg.page_list_len; i++)
3486                                 dst_page_list[i] = cpu_to_le64(src_page_list[i]);
3487
3488                         nes_debug(NES_DBG_IW_TX, "SQ_FMR: iova_start: %p, "
3489                                   "length: %d, rkey: %0x, pgl_paddr: %p, "
3490                                   "page_list_len: %u, wqe_misc: %x\n",
3491                                   (void *)ib_wr->wr.fast_reg.iova_start,
3492                                   ib_wr->wr.fast_reg.length,
3493                                   ib_wr->wr.fast_reg.rkey,
3494                                   (void *)pnesfrpl->nes_wqe_pbl.paddr,
3495                                   ib_wr->wr.fast_reg.page_list_len,
3496                                   wqe_misc);
3497                         break;
3498                 }
3499                 default:
3500                         /* error */
3501                         err = -EINVAL;
3502                         break;
3503                 }
3504
3505                 if (err)
3506                         break;
3507
3508                 if ((ib_wr->send_flags & IB_SEND_SIGNALED) || nesqp->sig_all)
3509                         wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
3510
3511                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
3512
3513                 ib_wr = ib_wr->next;
3514                 head++;
3515                 wqe_count++;
3516                 if (head >= qsize)
3517                         head = 0;
3518
3519         }
3520
3521         nesqp->hwqp.sq_head = head;
3522         barrier();
3523         while (wqe_count) {
3524                 counter = min(wqe_count, ((u32)255));
3525                 wqe_count -= counter;
3526                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3527                                 (counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3528         }
3529
3530         spin_unlock_irqrestore(&nesqp->lock, flags);
3531
3532 out:
3533         if (err)
3534                 *bad_wr = ib_wr;
3535         return err;
3536 }
3537
3538
3539 /**
3540  * nes_post_recv
3541  */
3542 static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
3543                 struct ib_recv_wr **bad_wr)
3544 {
3545         u64 u64temp;
3546         unsigned long flags = 0;
3547         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
3548         struct nes_device *nesdev = nesvnic->nesdev;
3549         struct nes_qp *nesqp = to_nesqp(ibqp);
3550         struct nes_hw_qp_wqe *wqe;
3551         int err = 0;
3552         int sge_index;
3553         u32 qsize = nesqp->hwqp.rq_size;
3554         u32 head;
3555         u32 wqe_count = 0;
3556         u32 counter;
3557         u32 total_payload_length;
3558
3559         if (nesqp->ibqp_state > IB_QPS_RTS) {
3560                 err = -EINVAL;
3561                 goto out;
3562         }
3563
3564         spin_lock_irqsave(&nesqp->lock, flags);
3565
3566         head = nesqp->hwqp.rq_head;
3567
3568         while (ib_wr) {
3569                 /* Check for QP error */
3570                 if (nesqp->term_flags) {
3571                         err = -EINVAL;
3572                         break;
3573                 }
3574
3575                 if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
3576                         err = -EINVAL;
3577                         break;
3578                 }
3579                 /* Check for RQ overflow */
3580                 if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
3581                         err = -ENOMEM;
3582                         break;
3583                 }
3584
3585                 nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
3586                 wqe = &nesqp->hwqp.rq_vbase[head];
3587
3588                 /* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
3589                                 nesqp->hwqp.qp_id, wqe, head); */
3590                 nes_fill_init_qp_wqe(wqe, nesqp, head);
3591                 u64temp = (u64)(ib_wr->wr_id);
3592                 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
3593                                         u64temp);
3594                 total_payload_length = 0;
3595                 for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
3596                         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
3597                                         ib_wr->sg_list[sge_index].addr);
3598                         set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
3599                                         ib_wr->sg_list[sge_index].length);
3600                         set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
3601                                         ib_wr->sg_list[sge_index].lkey);
3602
3603                         total_payload_length += ib_wr->sg_list[sge_index].length;
3604                 }
3605                 set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
3606                                         total_payload_length);
3607
3608                 ib_wr = ib_wr->next;
3609                 head++;
3610                 wqe_count++;
3611                 if (head >= qsize)
3612                         head = 0;
3613         }
3614
3615         nesqp->hwqp.rq_head = head;
3616         barrier();
3617         while (wqe_count) {
3618                 counter = min(wqe_count, ((u32)255));
3619                 wqe_count -= counter;
3620                 nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
3621         }
3622
3623         spin_unlock_irqrestore(&nesqp->lock, flags);
3624
3625 out:
3626         if (err)
3627                 *bad_wr = ib_wr;
3628         return err;
3629 }
3630
3631
3632 /**
3633  * nes_poll_cq
3634  */
3635 static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
3636 {
3637         u64 u64temp;
3638         u64 wrid;
3639         unsigned long flags = 0;
3640         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3641         struct nes_device *nesdev = nesvnic->nesdev;
3642         struct nes_cq *nescq = to_nescq(ibcq);
3643         struct nes_qp *nesqp;
3644         struct nes_hw_cqe cqe;
3645         u32 head;
3646         u32 wq_tail = 0;
3647         u32 cq_size;
3648         u32 cqe_count = 0;
3649         u32 wqe_index;
3650         u32 u32temp;
3651         u32 move_cq_head = 1;
3652         u32 err_code;
3653
3654         nes_debug(NES_DBG_CQ, "\n");
3655
3656         spin_lock_irqsave(&nescq->lock, flags);
3657
3658         head = nescq->hw_cq.cq_head;
3659         cq_size = nescq->hw_cq.cq_size;
3660
3661         while (cqe_count < num_entries) {
3662                 if ((le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
3663                                 NES_CQE_VALID) == 0)
3664                         break;
3665
3666                 /*
3667                  * Make sure we read CQ entry contents *after*
3668                  * we've checked the valid bit.
3669                  */
3670                 rmb();
3671
3672                 cqe = nescq->hw_cq.cq_vbase[head];
3673                 u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3674                 wqe_index = u32temp & (nesdev->nesadapter->max_qp_wr - 1);
3675                 u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
3676                 /* parse CQE, get completion context from WQE (either rq or sq) */
3677                 u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
3678                                 ((u64)u32temp);
3679
3680                 if (u64temp) {
3681                         nesqp = (struct nes_qp *)(unsigned long)u64temp;
3682                         memset(entry, 0, sizeof *entry);
3683                         if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
3684                                 entry->status = IB_WC_SUCCESS;
3685                         } else {
3686                                 err_code = le32_to_cpu(cqe.cqe_words[NES_CQE_ERROR_CODE_IDX]);
3687                                 if (NES_IWARP_CQE_MAJOR_DRV == (err_code >> 16)) {
3688                                         entry->status = err_code & 0x0000ffff;
3689
3690                                         /* The rest of the cqe's will be marked as flushed */
3691                                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_ERROR_CODE_IDX] =
3692                                                 cpu_to_le32((NES_IWARP_CQE_MAJOR_FLUSH << 16) |
3693                                                             NES_IWARP_CQE_MINOR_FLUSH);
3694                                 } else
3695                                         entry->status = IB_WC_WR_FLUSH_ERR;
3696                         }
3697
3698                         entry->qp = &nesqp->ibqp;
3699                         entry->src_qp = nesqp->hwqp.qp_id;
3700
3701                         if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
3702                                 if (nesqp->skip_lsmm) {
3703                                         nesqp->skip_lsmm = 0;
3704                                         nesqp->hwqp.sq_tail++;
3705                                 }
3706
3707                                 /* Working on a SQ Completion*/
3708                                 wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3709                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
3710                                                 ((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wqe_index].
3711                                                 wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
3712                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3713                                                 wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
3714
3715                                 switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3716                                                 wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
3717                                         case NES_IWARP_SQ_OP_RDMAW:
3718                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
3719                                                 entry->opcode = IB_WC_RDMA_WRITE;
3720                                                 break;
3721                                         case NES_IWARP_SQ_OP_RDMAR:
3722                                                 nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
3723                                                 entry->opcode = IB_WC_RDMA_READ;
3724                                                 entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wqe_index].
3725                                                                 wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
3726                                                 break;
3727                                         case NES_IWARP_SQ_OP_SENDINV:
3728                                         case NES_IWARP_SQ_OP_SENDSEINV:
3729                                         case NES_IWARP_SQ_OP_SEND:
3730                                         case NES_IWARP_SQ_OP_SENDSE:
3731                                                 nes_debug(NES_DBG_CQ, "Operation = Send.\n");
3732                                                 entry->opcode = IB_WC_SEND;
3733                                                 break;
3734                                         case NES_IWARP_SQ_OP_LOCINV:
3735                                                 entry->opcode = IB_WR_LOCAL_INV;
3736                                                 break;
3737                                         case NES_IWARP_SQ_OP_FAST_REG:
3738                                                 entry->opcode = IB_WC_FAST_REG_MR;
3739                                                 break;
3740                                 }
3741
3742                                 nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
3743                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)) {
3744                                         move_cq_head = 0;
3745                                         wq_tail = nesqp->hwqp.sq_tail;
3746                                 }
3747                         } else {
3748                                 /* Working on a RQ Completion*/
3749                                 entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
3750                                 wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
3751                                         ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wqe_index].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
3752                                         entry->opcode = IB_WC_RECV;
3753
3754                                 nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
3755                                 if ((entry->status != IB_WC_SUCCESS) && (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)) {
3756                                         move_cq_head = 0;
3757                                         wq_tail = nesqp->hwqp.rq_tail;
3758                                 }
3759                         }
3760
3761                         entry->wr_id = wrid;
3762                         entry++;
3763                         cqe_count++;
3764                 }
3765
3766                 if (move_cq_head) {
3767                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
3768                         if (++head >= cq_size)
3769                                 head = 0;
3770                         nescq->polled_completions++;
3771
3772                         if ((nescq->polled_completions > (cq_size / 2)) ||
3773                                         (nescq->polled_completions == 255)) {
3774                                 nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
3775                                         " are pending %u of %u.\n",
3776                                         nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
3777                                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3778                                         nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3779                                 nescq->polled_completions = 0;
3780                         }
3781                 } else {
3782                         /* Update the wqe index and set status to flush */
3783                         wqe_index = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
3784                         wqe_index = (wqe_index & (~(nesdev->nesadapter->max_qp_wr - 1))) | wq_tail;
3785                         nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX] =
3786                                 cpu_to_le32(wqe_index);
3787                         move_cq_head = 1; /* ready for next pass */
3788                 }
3789         }
3790
3791         if (nescq->polled_completions) {
3792                 nes_write32(nesdev->regs+NES_CQE_ALLOC,
3793                                 nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
3794                 nescq->polled_completions = 0;
3795         }
3796
3797         nescq->hw_cq.cq_head = head;
3798         nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
3799                         cqe_count, nescq->hw_cq.cq_number);
3800
3801         spin_unlock_irqrestore(&nescq->lock, flags);
3802
3803         return cqe_count;
3804 }
3805
3806
3807 /**
3808  * nes_req_notify_cq
3809  */
3810 static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
3811                 {
3812         struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
3813         struct nes_device *nesdev = nesvnic->nesdev;
3814         struct nes_cq *nescq = to_nescq(ibcq);
3815         u32 cq_arm;
3816
3817         nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
3818                         nescq->hw_cq.cq_number);
3819
3820         cq_arm = nescq->hw_cq.cq_number;
3821         if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
3822                 cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
3823         else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
3824                 cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
3825         else
3826                 return -EINVAL;
3827
3828         nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
3829         nes_read32(nesdev->regs+NES_CQE_ALLOC);
3830
3831         return 0;
3832 }
3833
3834
3835 /**
3836  * nes_init_ofa_device
3837  */
3838 struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
3839 {
3840         struct nes_ib_device *nesibdev;
3841         struct nes_vnic *nesvnic = netdev_priv(netdev);
3842         struct nes_device *nesdev = nesvnic->nesdev;
3843
3844         nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
3845         if (nesibdev == NULL) {
3846                 return NULL;
3847         }
3848         strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
3849         nesibdev->ibdev.owner = THIS_MODULE;
3850
3851         nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
3852         memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
3853         memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
3854
3855         nesibdev->ibdev.uverbs_cmd_mask =
3856                         (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
3857                         (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
3858                         (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
3859                         (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
3860                         (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
3861                         (1ull << IB_USER_VERBS_CMD_REG_MR) |
3862                         (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
3863                         (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
3864                         (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
3865                         (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
3866                         (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
3867                         (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
3868                         (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
3869                         (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
3870                         (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
3871                         (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
3872                         (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
3873                         (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
3874                         (1ull << IB_USER_VERBS_CMD_BIND_MW) |
3875                         (1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
3876                         (1ull << IB_USER_VERBS_CMD_POST_RECV) |
3877                         (1ull << IB_USER_VERBS_CMD_POST_SEND);
3878
3879         nesibdev->ibdev.phys_port_cnt = 1;
3880         nesibdev->ibdev.num_comp_vectors = 1;
3881         nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
3882         nesibdev->ibdev.dev.parent = &nesdev->pcidev->dev;
3883         nesibdev->ibdev.query_device = nes_query_device;
3884         nesibdev->ibdev.query_port = nes_query_port;
3885         nesibdev->ibdev.modify_port = nes_modify_port;
3886         nesibdev->ibdev.query_pkey = nes_query_pkey;
3887         nesibdev->ibdev.query_gid = nes_query_gid;
3888         nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
3889         nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
3890         nesibdev->ibdev.mmap = nes_mmap;
3891         nesibdev->ibdev.alloc_pd = nes_alloc_pd;
3892         nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
3893         nesibdev->ibdev.create_ah = nes_create_ah;
3894         nesibdev->ibdev.destroy_ah = nes_destroy_ah;
3895         nesibdev->ibdev.create_qp = nes_create_qp;
3896         nesibdev->ibdev.modify_qp = nes_modify_qp;
3897         nesibdev->ibdev.query_qp = nes_query_qp;
3898         nesibdev->ibdev.destroy_qp = nes_destroy_qp;
3899         nesibdev->ibdev.create_cq = nes_create_cq;
3900         nesibdev->ibdev.destroy_cq = nes_destroy_cq;
3901         nesibdev->ibdev.poll_cq = nes_poll_cq;
3902         nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
3903         nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
3904         nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
3905         nesibdev->ibdev.dereg_mr = nes_dereg_mr;
3906         nesibdev->ibdev.alloc_mw = nes_alloc_mw;
3907         nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
3908         nesibdev->ibdev.bind_mw = nes_bind_mw;
3909
3910         nesibdev->ibdev.alloc_fast_reg_mr = nes_alloc_fast_reg_mr;
3911         nesibdev->ibdev.alloc_fast_reg_page_list = nes_alloc_fast_reg_page_list;
3912         nesibdev->ibdev.free_fast_reg_page_list = nes_free_fast_reg_page_list;
3913
3914         nesibdev->ibdev.attach_mcast = nes_multicast_attach;
3915         nesibdev->ibdev.detach_mcast = nes_multicast_detach;
3916         nesibdev->ibdev.process_mad = nes_process_mad;
3917
3918         nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
3919         nesibdev->ibdev.post_send = nes_post_send;
3920         nesibdev->ibdev.post_recv = nes_post_recv;
3921
3922         nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
3923         if (nesibdev->ibdev.iwcm == NULL) {
3924                 ib_dealloc_device(&nesibdev->ibdev);
3925                 return NULL;
3926         }
3927         nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
3928         nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
3929         nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
3930         nesibdev->ibdev.iwcm->connect = nes_connect;
3931         nesibdev->ibdev.iwcm->accept = nes_accept;
3932         nesibdev->ibdev.iwcm->reject = nes_reject;
3933         nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
3934         nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
3935
3936         return nesibdev;
3937 }
3938
3939
3940 /**
3941  * nes_destroy_ofa_device
3942  */
3943 void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
3944 {
3945         if (nesibdev == NULL)
3946                 return;
3947
3948         nes_unregister_ofa_device(nesibdev);
3949
3950         kfree(nesibdev->ibdev.iwcm);
3951         ib_dealloc_device(&nesibdev->ibdev);
3952 }
3953
3954
3955 /**
3956  * nes_register_ofa_device
3957  */
3958 int nes_register_ofa_device(struct nes_ib_device *nesibdev)
3959 {
3960         struct nes_vnic *nesvnic = nesibdev->nesvnic;
3961         struct nes_device *nesdev = nesvnic->nesdev;
3962         struct nes_adapter *nesadapter = nesdev->nesadapter;
3963         int i, ret;
3964
3965         ret = ib_register_device(&nesvnic->nesibdev->ibdev);
3966         if (ret) {
3967                 return ret;
3968         }
3969
3970         /* Get the resources allocated to this device */
3971         nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
3972         nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
3973         nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
3974         nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
3975
3976         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
3977                 ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
3978                 if (ret) {
3979                         while (i > 0) {
3980                                 i--;
3981                                 device_remove_file(&nesibdev->ibdev.dev,
3982                                                    nes_dev_attributes[i]);
3983                         }
3984                         ib_unregister_device(&nesibdev->ibdev);
3985                         return ret;
3986                 }
3987         }
3988
3989         nesvnic->of_device_registered = 1;
3990
3991         return 0;
3992 }
3993
3994
3995 /**
3996  * nes_unregister_ofa_device
3997  */
3998 static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
3999 {
4000         struct nes_vnic *nesvnic = nesibdev->nesvnic;
4001         int i;
4002
4003         for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
4004                 device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
4005         }
4006
4007         if (nesvnic->of_device_registered) {
4008                 ib_unregister_device(&nesibdev->ibdev);
4009         }
4010
4011         nesvnic->of_device_registered = 0;
4012 }