drivers/infiniband/hw/mthca/mthca_cmd.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   4  * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  *
  34  * $Id: mthca_cmd.c 1349 2004-12-16 21:09:43Z roland $
  35  */
  36
  37 #include <linux/completion.h>
  38 #include <linux/pci.h>
  39 #include <linux/errno.h>
  40 #include <asm/io.h>
  41 #include <rdma/ib_mad.h>
  42
  43 #include "mthca_dev.h"
  44 #include "mthca_config_reg.h"
  45 #include "mthca_cmd.h"
  46 #include "mthca_memfree.h"
  47
  48 #define CMD_POLL_TOKEN 0xffff
  49
  50 enum {
  51         HCR_IN_PARAM_OFFSET    = 0x00,
  52         HCR_IN_MODIFIER_OFFSET = 0x08,
  53         HCR_OUT_PARAM_OFFSET   = 0x0c,
  54         HCR_TOKEN_OFFSET       = 0x14,
  55         HCR_STATUS_OFFSET      = 0x18,
  56
  57         HCR_OPMOD_SHIFT        = 12,
  58         HCA_E_BIT              = 22,
  59         HCR_GO_BIT             = 23
  60 };
  61
  62 enum {
  63         /* initialization and general commands */
  64         CMD_SYS_EN          = 0x1,
  65         CMD_SYS_DIS         = 0x2,
  66         CMD_MAP_FA          = 0xfff,
  67         CMD_UNMAP_FA        = 0xffe,
  68         CMD_RUN_FW          = 0xff6,
  69         CMD_MOD_STAT_CFG    = 0x34,
  70         CMD_QUERY_DEV_LIM   = 0x3,
  71         CMD_QUERY_FW        = 0x4,
  72         CMD_ENABLE_LAM      = 0xff8,
  73         CMD_DISABLE_LAM     = 0xff7,
  74         CMD_QUERY_DDR       = 0x5,
  75         CMD_QUERY_ADAPTER   = 0x6,
  76         CMD_INIT_HCA        = 0x7,
  77         CMD_CLOSE_HCA       = 0x8,
  78         CMD_INIT_IB         = 0x9,
  79         CMD_CLOSE_IB        = 0xa,
  80         CMD_QUERY_HCA       = 0xb,
  81         CMD_SET_IB          = 0xc,
  82         CMD_ACCESS_DDR      = 0x2e,
  83         CMD_MAP_ICM         = 0xffa,
  84         CMD_UNMAP_ICM       = 0xff9,
  85         CMD_MAP_ICM_AUX     = 0xffc,
  86         CMD_UNMAP_ICM_AUX   = 0xffb,
  87         CMD_SET_ICM_SIZE    = 0xffd,
  88
  89         /* TPT commands */
  90         CMD_SW2HW_MPT       = 0xd,
  91         CMD_QUERY_MPT       = 0xe,
  92         CMD_HW2SW_MPT       = 0xf,
  93         CMD_READ_MTT        = 0x10,
  94         CMD_WRITE_MTT       = 0x11,
  95         CMD_SYNC_TPT        = 0x2f,
  96
  97         /* EQ commands */
  98         CMD_MAP_EQ          = 0x12,
  99         CMD_SW2HW_EQ        = 0x13,
 100         CMD_HW2SW_EQ        = 0x14,
 101         CMD_QUERY_EQ        = 0x15,
 102
 103         /* CQ commands */
 104         CMD_SW2HW_CQ        = 0x16,
 105         CMD_HW2SW_CQ        = 0x17,
 106         CMD_QUERY_CQ        = 0x18,
 107         CMD_RESIZE_CQ       = 0x2c,
 108
 109         /* SRQ commands */
 110         CMD_SW2HW_SRQ       = 0x35,
 111         CMD_HW2SW_SRQ       = 0x36,
 112         CMD_QUERY_SRQ       = 0x37,
 113         CMD_ARM_SRQ         = 0x40,
 114
 115         /* QP/EE commands */
 116         CMD_RST2INIT_QPEE   = 0x19,
 117         CMD_INIT2RTR_QPEE   = 0x1a,
 118         CMD_RTR2RTS_QPEE    = 0x1b,
 119         CMD_RTS2RTS_QPEE    = 0x1c,
 120         CMD_SQERR2RTS_QPEE  = 0x1d,
 121         CMD_2ERR_QPEE       = 0x1e,
 122         CMD_RTS2SQD_QPEE    = 0x1f,
 123         CMD_SQD2SQD_QPEE    = 0x38,
 124         CMD_SQD2RTS_QPEE    = 0x20,
 125         CMD_ERR2RST_QPEE    = 0x21,
 126         CMD_QUERY_QPEE      = 0x22,
 127         CMD_INIT2INIT_QPEE  = 0x2d,
 128         CMD_SUSPEND_QPEE    = 0x32,
 129         CMD_UNSUSPEND_QPEE  = 0x33,
 130         /* special QPs and management commands */
 131         CMD_CONF_SPECIAL_QP = 0x23,
 132         CMD_MAD_IFC         = 0x24,
 133
 134         /* multicast commands */
 135         CMD_READ_MGM        = 0x25,
 136         CMD_WRITE_MGM       = 0x26,
 137         CMD_MGID_HASH       = 0x27,
 138
 139         /* miscellaneous commands */
 140         CMD_DIAG_RPRT       = 0x30,
 141         CMD_NOP             = 0x31,
 142
 143         /* debug commands */
 144         CMD_QUERY_DEBUG_MSG = 0x2a,
 145         CMD_SET_DEBUG_MSG   = 0x2b,
 146 };
 147
 148 /*
 149  * According to Mellanox code, FW may be starved and never complete
 150  * commands.  So we can't use strict timeouts described in PRM -- we
 151  * just arbitrarily select 60 seconds for now.
 152  */
 153 #if 0
 154 /*
 155  * Round up and add 1 to make sure we get the full wait time (since we
 156  * will be starting in the middle of a jiffy)
 157  */
 158 enum {
 159         CMD_TIME_CLASS_A = (HZ + 999) / 1000 + 1,
 160         CMD_TIME_CLASS_B = (HZ +  99) /  100 + 1,
 161         CMD_TIME_CLASS_C = (HZ +   9) /   10 + 1
 162 };
 163 #else
 164 enum {
 165         CMD_TIME_CLASS_A = 60 * HZ,
 166         CMD_TIME_CLASS_B = 60 * HZ,
 167         CMD_TIME_CLASS_C = 60 * HZ
 168 };
 169 #endif
 170
 171 enum {
 172         GO_BIT_TIMEOUT = HZ * 10
 173 };
 174
 175 struct mthca_cmd_context {
 176         struct completion done;
 177         int               result;
 178         int               next;
 179         u64               out_param;
 180         u16               token;
 181         u8                status;
 182 };
 183
 184 static int fw_cmd_doorbell = 0;
 185 module_param(fw_cmd_doorbell, int, 0644);
 186 MODULE_PARM_DESC(fw_cmd_doorbell, "post FW commands through doorbell page if nonzero "
 187                  "(and supported by FW)");
 188
 189 static inline int go_bit(struct mthca_dev *dev)
 190 {
 191         return readl(dev->hcr + HCR_STATUS_OFFSET) &
 192                 swab32(1 << HCR_GO_BIT);
 193 }
 194
 195 static void mthca_cmd_post_dbell(struct mthca_dev *dev,
 196                                  u64 in_param,
 197                                  u64 out_param,
 198                                  u32 in_modifier,
 199                                  u8 op_modifier,
 200                                  u16 op,
 201                                  u16 token)
 202 {
 203         void __iomem *ptr = dev->cmd.dbell_map;
 204         u16 *offs = dev->cmd.dbell_offsets;
 205
 206         __raw_writel((__force u32) cpu_to_be32(in_param >> 32),           ptr + offs[0]);
 207         wmb();
 208         __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful),  ptr + offs[1]);
 209         wmb();
 210         __raw_writel((__force u32) cpu_to_be32(in_modifier),              ptr + offs[2]);
 211         wmb();
 212         __raw_writel((__force u32) cpu_to_be32(out_param >> 32),          ptr + offs[3]);
 213         wmb();
 214         __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), ptr + offs[4]);
 215         wmb();
 216         __raw_writel((__force u32) cpu_to_be32(token << 16),              ptr + offs[5]);
 217         wmb();
 218         __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT)                |
 219                                                (1 << HCA_E_BIT)                 |
 220                                                (op_modifier << HCR_OPMOD_SHIFT) |
 221                                                 op),                      ptr + offs[6]);
 222         wmb();
 223         __raw_writel((__force u32) 0,                                     ptr + offs[7]);
 224         wmb();
 225 }
 226
 227 static int mthca_cmd_post_hcr(struct mthca_dev *dev,
 228                               u64 in_param,
 229                               u64 out_param,
 230                               u32 in_modifier,
 231                               u8 op_modifier,
 232                               u16 op,
 233                               u16 token,
 234                               int event)
 235 {
 236         if (event) {
 237                 unsigned long end = jiffies + GO_BIT_TIMEOUT;
 238
 239                 while (go_bit(dev) && time_before(jiffies, end)) {
 240                         set_current_state(TASK_RUNNING);
 241                         schedule();
 242                 }
 243         }
 244
 245         if (go_bit(dev))
 246                 return -EAGAIN;
 247
 248         /*
 249          * We use writel (instead of something like memcpy_toio)
 250          * because writes of less than 32 bits to the HCR don't work
 251          * (and some architectures such as ia64 implement memcpy_toio
 252          * in terms of writeb).
 253          */
 254         __raw_writel((__force u32) cpu_to_be32(in_param >> 32),           dev->hcr + 0 * 4);
 255         __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful),  dev->hcr + 1 * 4);
 256         __raw_writel((__force u32) cpu_to_be32(in_modifier),              dev->hcr + 2 * 4);
 257         __raw_writel((__force u32) cpu_to_be32(out_param >> 32),          dev->hcr + 3 * 4);
 258         __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), dev->hcr + 4 * 4);
 259         __raw_writel((__force u32) cpu_to_be32(token << 16),              dev->hcr + 5 * 4);
 260
 261         /* __raw_writel may not order writes. */
 262         wmb();
 263
 264         __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT)                |
 265                                                (event ? (1 << HCA_E_BIT) : 0)   |
 266                                                (op_modifier << HCR_OPMOD_SHIFT) |
 267                                                op),                       dev->hcr + 6 * 4);
 268
 269         return 0;
 270 }
 271
 272 static int mthca_cmd_post(struct mthca_dev *dev,
 273                           u64 in_param,
 274                           u64 out_param,
 275                           u32 in_modifier,
 276                           u8 op_modifier,
 277                           u16 op,
 278                           u16 token,
 279                           int event)
 280 {
 281         int err = 0;
 282
 283         mutex_lock(&dev->cmd.hcr_mutex);
 284
 285         if (event && dev->cmd.flags & MTHCA_CMD_POST_DOORBELLS && fw_cmd_doorbell)
 286                 mthca_cmd_post_dbell(dev, in_param, out_param, in_modifier,
 287                                            op_modifier, op, token);
 288         else
 289                 err = mthca_cmd_post_hcr(dev, in_param, out_param, in_modifier,
 290                                          op_modifier, op, token, event);
 291
 292         mutex_unlock(&dev->cmd.hcr_mutex);
 293         return err;
 294 }
 295
 296 static int mthca_cmd_poll(struct mthca_dev *dev,
 297                           u64 in_param,
 298                           u64 *out_param,
 299                           int out_is_imm,
 300                           u32 in_modifier,
 301                           u8 op_modifier,
 302                           u16 op,
 303                           unsigned long timeout,
 304                           u8 *status)
 305 {
 306         int err = 0;
 307         unsigned long end;
 308
 309         down(&dev->cmd.poll_sem);
 310
 311         err = mthca_cmd_post(dev, in_param,
 312                              out_param ? *out_param : 0,
 313                              in_modifier, op_modifier,
 314                              op, CMD_POLL_TOKEN, 0);
 315         if (err)
 316                 goto out;
 317
 318         end = timeout + jiffies;
 319         while (go_bit(dev) && time_before(jiffies, end)) {
 320                 set_current_state(TASK_RUNNING);
 321                 schedule();
 322         }
 323
 324         if (go_bit(dev)) {
 325                 err = -EBUSY;
 326                 goto out;
 327         }
 328
 329         if (out_is_imm)
 330                 *out_param =
 331                         (u64) be32_to_cpu((__force __be32)
 332                                           __raw_readl(dev->hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
 333                         (u64) be32_to_cpu((__force __be32)
 334                                           __raw_readl(dev->hcr + HCR_OUT_PARAM_OFFSET + 4));
 335
 336         *status = be32_to_cpu((__force __be32) __raw_readl(dev->hcr + HCR_STATUS_OFFSET)) >> 24;
 337
 338 out:
 339         up(&dev->cmd.poll_sem);
 340         return err;
 341 }
 342
 343 void mthca_cmd_event(struct mthca_dev *dev,
 344                      u16 token,
 345                      u8  status,
 346                      u64 out_param)
 347 {
 348         struct mthca_cmd_context *context =
 349                 &dev->cmd.context[token & dev->cmd.token_mask];
 350
 351         /* previously timed out command completing at long last */
 352         if (token != context->token)
 353                 return;
 354
 355         context->result    = 0;
 356         context->status    = status;
 357         context->out_param = out_param;
 358
 359         context->token += dev->cmd.token_mask + 1;
 360
 361         complete(&context->done);
 362 }
 363
 364 static int mthca_cmd_wait(struct mthca_dev *dev,
 365                           u64 in_param,
 366                           u64 *out_param,
 367                           int out_is_imm,
 368                           u32 in_modifier,
 369                           u8 op_modifier,
 370                           u16 op,
 371                           unsigned long timeout,
 372                           u8 *status)
 373 {
 374         int err = 0;
 375         struct mthca_cmd_context *context;
 376
 377         down(&dev->cmd.event_sem);
 378
 379         spin_lock(&dev->cmd.context_lock);
 380         BUG_ON(dev->cmd.free_head < 0);
 381         context = &dev->cmd.context[dev->cmd.free_head];
 382         dev->cmd.free_head = context->next;
 383         spin_unlock(&dev->cmd.context_lock);
 384
 385         init_completion(&context->done);
 386
 387         err = mthca_cmd_post(dev, in_param,
 388                              out_param ? *out_param : 0,
 389                              in_modifier, op_modifier,
 390                              op, context->token, 1);
 391         if (err)
 392                 goto out;
 393
 394         if (!wait_for_completion_timeout(&context->done, timeout)) {
 395                 err = -EBUSY;
 396                 goto out;
 397         }
 398
 399         err = context->result;
 400         if (err)
 401                 goto out;
 402
 403         *status = context->status;
 404         if (*status)
 405                 mthca_dbg(dev, "Command %02x completed with status %02x\n",
 406                           op, *status);
 407
 408         if (out_is_imm)
 409                 *out_param = context->out_param;
 410
 411 out:
 412         spin_lock(&dev->cmd.context_lock);
 413         context->next = dev->cmd.free_head;
 414         dev->cmd.free_head = context - dev->cmd.context;
 415         spin_unlock(&dev->cmd.context_lock);
 416
 417         up(&dev->cmd.event_sem);
 418         return err;
 419 }
 420
 421 /* Invoke a command with an output mailbox */
 422 static int mthca_cmd_box(struct mthca_dev *dev,
 423                          u64 in_param,
 424                          u64 out_param,
 425                          u32 in_modifier,
 426                          u8 op_modifier,
 427                          u16 op,
 428                          unsigned long timeout,
 429                          u8 *status)
 430 {
 431         if (dev->cmd.flags & MTHCA_CMD_USE_EVENTS)
 432                 return mthca_cmd_wait(dev, in_param, &out_param, 0,
 433                                       in_modifier, op_modifier, op,
 434                                       timeout, status);
 435         else
 436                 return mthca_cmd_poll(dev, in_param, &out_param, 0,
 437                                       in_modifier, op_modifier, op,
 438                                       timeout, status);
 439 }
 440
 441 /* Invoke a command with no output parameter */
 442 static int mthca_cmd(struct mthca_dev *dev,
 443                      u64 in_param,
 444                      u32 in_modifier,
 445                      u8 op_modifier,
 446                      u16 op,
 447                      unsigned long timeout,
 448                      u8 *status)
 449 {
 450         return mthca_cmd_box(dev, in_param, 0, in_modifier,
 451                              op_modifier, op, timeout, status);
 452 }
 453
 454 /*
 455  * Invoke a command with an immediate output parameter (and copy the
 456  * output into the caller's out_param pointer after the command
 457  * executes).
 458  */
 459 static int mthca_cmd_imm(struct mthca_dev *dev,
 460                          u64 in_param,
 461                          u64 *out_param,
 462                          u32 in_modifier,
 463                          u8 op_modifier,
 464                          u16 op,
 465                          unsigned long timeout,
 466                          u8 *status)
 467 {
 468         if (dev->cmd.flags & MTHCA_CMD_USE_EVENTS)
 469                 return mthca_cmd_wait(dev, in_param, out_param, 1,
 470                                       in_modifier, op_modifier, op,
 471                                       timeout, status);
 472         else
 473                 return mthca_cmd_poll(dev, in_param, out_param, 1,
 474                                       in_modifier, op_modifier, op,
 475                                       timeout, status);
 476 }
 477
 478 int mthca_cmd_init(struct mthca_dev *dev)
 479 {
 480         mutex_init(&dev->cmd.hcr_mutex);
 481         sema_init(&dev->cmd.poll_sem, 1);
 482         dev->cmd.flags = 0;
 483
 484         dev->hcr = ioremap(pci_resource_start(dev->pdev, 0) + MTHCA_HCR_BASE,
 485                            MTHCA_HCR_SIZE);
 486         if (!dev->hcr) {
 487                 mthca_err(dev, "Couldn't map command register.");
 488                 return -ENOMEM;
 489         }
 490
 491         dev->cmd.pool = pci_pool_create("mthca_cmd", dev->pdev,
 492                                         MTHCA_MAILBOX_SIZE,
 493                                         MTHCA_MAILBOX_SIZE, 0);
 494         if (!dev->cmd.pool) {
 495                 iounmap(dev->hcr);
 496                 return -ENOMEM;
 497         }
 498
 499         return 0;
 500 }
 501
 502 void mthca_cmd_cleanup(struct mthca_dev *dev)
 503 {
 504         pci_pool_destroy(dev->cmd.pool);
 505         iounmap(dev->hcr);
 506         if (dev->cmd.flags & MTHCA_CMD_POST_DOORBELLS)
 507                 iounmap(dev->cmd.dbell_map);
 508 }
 509
 510 /*
 511  * Switch to using events to issue FW commands (should be called after
 512  * event queue to command events has been initialized).
 513  */
 514 int mthca_cmd_use_events(struct mthca_dev *dev)
 515 {
 516         int i;
 517
 518         dev->cmd.context = kmalloc(dev->cmd.max_cmds *
 519                                    sizeof (struct mthca_cmd_context),
 520                                    GFP_KERNEL);
 521         if (!dev->cmd.context)
 522                 return -ENOMEM;
 523
 524         for (i = 0; i < dev->cmd.max_cmds; ++i) {
 525                 dev->cmd.context[i].token = i;
 526                 dev->cmd.context[i].next = i + 1;
 527         }
 528
 529         dev->cmd.context[dev->cmd.max_cmds - 1].next = -1;
 530         dev->cmd.free_head = 0;
 531
 532         sema_init(&dev->cmd.event_sem, dev->cmd.max_cmds);
 533         spin_lock_init(&dev->cmd.context_lock);
 534
 535         for (dev->cmd.token_mask = 1;
 536              dev->cmd.token_mask < dev->cmd.max_cmds;
 537              dev->cmd.token_mask <<= 1)
 538                 ; /* nothing */
 539         --dev->cmd.token_mask;
 540
 541         dev->cmd.flags |= MTHCA_CMD_USE_EVENTS;
 542
 543         down(&dev->cmd.poll_sem);
 544
 545         return 0;
 546 }
 547
 548 /*
 549  * Switch back to polling (used when shutting down the device)
 550  */
 551 void mthca_cmd_use_polling(struct mthca_dev *dev)
 552 {
 553         int i;
 554
 555         dev->cmd.flags &= ~MTHCA_CMD_USE_EVENTS;
 556
 557         for (i = 0; i < dev->cmd.max_cmds; ++i)
 558                 down(&dev->cmd.event_sem);
 559
 560         kfree(dev->cmd.context);
 561
 562         up(&dev->cmd.poll_sem);
 563 }
 564
 565 struct mthca_mailbox *mthca_alloc_mailbox(struct mthca_dev *dev,
 566                                           gfp_t gfp_mask)
 567 {
 568         struct mthca_mailbox *mailbox;
 569
 570         mailbox = kmalloc(sizeof *mailbox, gfp_mask);
 571         if (!mailbox)
 572                 return ERR_PTR(-ENOMEM);
 573
 574         mailbox->buf = pci_pool_alloc(dev->cmd.pool, gfp_mask, &mailbox->dma);
 575         if (!mailbox->buf) {
 576                 kfree(mailbox);
 577                 return ERR_PTR(-ENOMEM);
 578         }
 579
 580         return mailbox;
 581 }
 582
 583 void mthca_free_mailbox(struct mthca_dev *dev, struct mthca_mailbox *mailbox)
 584 {
 585         if (!mailbox)
 586                 return;
 587
 588         pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma);
 589         kfree(mailbox);
 590 }
 591
 592 int mthca_SYS_EN(struct mthca_dev *dev, u8 *status)
 593 {
 594         u64 out;
 595         int ret;
 596
 597         ret = mthca_cmd_imm(dev, 0, &out, 0, 0, CMD_SYS_EN, HZ, status);
 598
 599         if (*status == MTHCA_CMD_STAT_DDR_MEM_ERR)
 600                 mthca_warn(dev, "SYS_EN DDR error: syn=%x, sock=%d, "
 601                            "sladdr=%d, SPD source=%s\n",
 602                            (int) (out >> 6) & 0xf, (int) (out >> 4) & 3,
 603                            (int) (out >> 1) & 7, (int) out & 1 ? "NVMEM" : "DIMM");
 604
 605         return ret;
 606 }
 607
 608 int mthca_SYS_DIS(struct mthca_dev *dev, u8 *status)
 609 {
 610         return mthca_cmd(dev, 0, 0, 0, CMD_SYS_DIS, HZ, status);
 611 }
 612
 613 static int mthca_map_cmd(struct mthca_dev *dev, u16 op, struct mthca_icm *icm,
 614                          u64 virt, u8 *status)
 615 {
 616         struct mthca_mailbox *mailbox;
 617         struct mthca_icm_iter iter;
 618         __be64 *pages;
 619         int lg;
 620         int nent = 0;
 621         int i;
 622         int err = 0;
 623         int ts = 0, tc = 0;
 624
 625         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 626         if (IS_ERR(mailbox))
 627                 return PTR_ERR(mailbox);
 628         memset(mailbox->buf, 0, MTHCA_MAILBOX_SIZE);
 629         pages = mailbox->buf;
 630
 631         for (mthca_icm_first(icm, &iter);
 632              !mthca_icm_last(&iter);
 633              mthca_icm_next(&iter)) {
 634                 /*
 635                  * We have to pass pages that are aligned to their
 636                  * size, so find the least significant 1 in the
 637                  * address or size and use that as our log2 size.
 638                  */
 639                 lg = ffs(mthca_icm_addr(&iter) | mthca_icm_size(&iter)) - 1;
 640                 if (lg < MTHCA_ICM_PAGE_SHIFT) {
 641                         mthca_warn(dev, "Got FW area not aligned to %d (%llx/%lx).\n",
 642                                    MTHCA_ICM_PAGE_SIZE,
 643                                    (unsigned long long) mthca_icm_addr(&iter),
 644                                    mthca_icm_size(&iter));
 645                         err = -EINVAL;
 646                         goto out;
 647                 }
 648                 for (i = 0; i < mthca_icm_size(&iter) >> lg; ++i) {
 649                         if (virt != -1) {
 650                                 pages[nent * 2] = cpu_to_be64(virt);
 651                                 virt += 1 << lg;
 652                         }
 653
 654                         pages[nent * 2 + 1] =
 655                                 cpu_to_be64((mthca_icm_addr(&iter) + (i << lg)) |
 656                                             (lg - MTHCA_ICM_PAGE_SHIFT));
 657                         ts += 1 << (lg - 10);
 658                         ++tc;
 659
 660                         if (++nent == MTHCA_MAILBOX_SIZE / 16) {
 661                                 err = mthca_cmd(dev, mailbox->dma, nent, 0, op,
 662                                                 CMD_TIME_CLASS_B, status);
 663                                 if (err || *status)
 664                                         goto out;
 665                                 nent = 0;
 666                         }
 667                 }
 668         }
 669
 670         if (nent)
 671                 err = mthca_cmd(dev, mailbox->dma, nent, 0, op,
 672                                 CMD_TIME_CLASS_B, status);
 673
 674         switch (op) {
 675         case CMD_MAP_FA:
 676                 mthca_dbg(dev, "Mapped %d chunks/%d KB for FW.\n", tc, ts);
 677                 break;
 678         case CMD_MAP_ICM_AUX:
 679                 mthca_dbg(dev, "Mapped %d chunks/%d KB for ICM aux.\n", tc, ts);
 680                 break;
 681         case CMD_MAP_ICM:
 682                 mthca_dbg(dev, "Mapped %d chunks/%d KB at %llx for ICM.\n",
 683                           tc, ts, (unsigned long long) virt - (ts << 10));
 684                 break;
 685         }
 686
 687 out:
 688         mthca_free_mailbox(dev, mailbox);
 689         return err;
 690 }
 691
 692 int mthca_MAP_FA(struct mthca_dev *dev, struct mthca_icm *icm, u8 *status)
 693 {
 694         return mthca_map_cmd(dev, CMD_MAP_FA, icm, -1, status);
 695 }
 696
 697 int mthca_UNMAP_FA(struct mthca_dev *dev, u8 *status)
 698 {
 699         return mthca_cmd(dev, 0, 0, 0, CMD_UNMAP_FA, CMD_TIME_CLASS_B, status);
 700 }
 701
 702 int mthca_RUN_FW(struct mthca_dev *dev, u8 *status)
 703 {
 704         return mthca_cmd(dev, 0, 0, 0, CMD_RUN_FW, CMD_TIME_CLASS_A, status);
 705 }
 706
 707 static void mthca_setup_cmd_doorbells(struct mthca_dev *dev, u64 base)
 708 {
 709         unsigned long addr;
 710         u16 max_off = 0;
 711         int i;
 712
 713         for (i = 0; i < 8; ++i)
 714                 max_off = max(max_off, dev->cmd.dbell_offsets[i]);
 715
 716         if ((base & PAGE_MASK) != ((base + max_off) & PAGE_MASK)) {
 717                 mthca_warn(dev, "Firmware doorbell region at 0x%016llx, "
 718                            "length 0x%x crosses a page boundary\n",
 719                            (unsigned long long) base, max_off);
 720                 return;
 721         }
 722
 723         addr = pci_resource_start(dev->pdev, 2) +
 724                 ((pci_resource_len(dev->pdev, 2) - 1) & base);
 725         dev->cmd.dbell_map = ioremap(addr, max_off + sizeof(u32));
 726         if (!dev->cmd.dbell_map)
 727                 return;
 728
 729         dev->cmd.flags |= MTHCA_CMD_POST_DOORBELLS;
 730         mthca_dbg(dev, "Mapped doorbell page for posting FW commands\n");
 731 }
 732
 733 int mthca_QUERY_FW(struct mthca_dev *dev, u8 *status)
 734 {
 735         struct mthca_mailbox *mailbox;
 736         u32 *outbox;
 737         u64 base;
 738         u32 tmp;
 739         int err = 0;
 740         u8 lg;
 741         int i;
 742
 743 #define QUERY_FW_OUT_SIZE             0x100
 744 #define QUERY_FW_VER_OFFSET            0x00
 745 #define QUERY_FW_MAX_CMD_OFFSET        0x0f
 746 #define QUERY_FW_ERR_START_OFFSET      0x30
 747 #define QUERY_FW_ERR_SIZE_OFFSET       0x38
 748
 749 #define QUERY_FW_CMD_DB_EN_OFFSET      0x10
 750 #define QUERY_FW_CMD_DB_OFFSET         0x50
 751 #define QUERY_FW_CMD_DB_BASE           0x60
 752
 753 #define QUERY_FW_START_OFFSET          0x20
 754 #define QUERY_FW_END_OFFSET            0x28
 755
 756 #define QUERY_FW_SIZE_OFFSET           0x00
 757 #define QUERY_FW_CLR_INT_BASE_OFFSET   0x20
 758 #define QUERY_FW_EQ_ARM_BASE_OFFSET    0x40
 759 #define QUERY_FW_EQ_SET_CI_BASE_OFFSET 0x48
 760
 761         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 762         if (IS_ERR(mailbox))
 763                 return PTR_ERR(mailbox);
 764         outbox = mailbox->buf;
 765
 766         err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_FW,
 767                             CMD_TIME_CLASS_A, status);
 768
 769         if (err)
 770                 goto out;
 771
 772         MTHCA_GET(dev->fw_ver,   outbox, QUERY_FW_VER_OFFSET);
 773         /*
 774          * FW subminor version is at more signifant bits than minor
 775          * version, so swap here.
 776          */
 777         dev->fw_ver = (dev->fw_ver & 0xffff00000000ull) |
 778                 ((dev->fw_ver & 0xffff0000ull) >> 16) |
 779                 ((dev->fw_ver & 0x0000ffffull) << 16);
 780
 781         MTHCA_GET(lg, outbox, QUERY_FW_MAX_CMD_OFFSET);
 782         dev->cmd.max_cmds = 1 << lg;
 783
 784         mthca_dbg(dev, "FW version %012llx, max commands %d\n",
 785                   (unsigned long long) dev->fw_ver, dev->cmd.max_cmds);
 786
 787         MTHCA_GET(dev->catas_err.addr, outbox, QUERY_FW_ERR_START_OFFSET);
 788         MTHCA_GET(dev->catas_err.size, outbox, QUERY_FW_ERR_SIZE_OFFSET);
 789
 790         mthca_dbg(dev, "Catastrophic error buffer at 0x%llx, size 0x%x\n",
 791                   (unsigned long long) dev->catas_err.addr, dev->catas_err.size);
 792
 793         MTHCA_GET(tmp, outbox, QUERY_FW_CMD_DB_EN_OFFSET);
 794         if (tmp & 0x1) {
 795                 mthca_dbg(dev, "FW supports commands through doorbells\n");
 796
 797                 MTHCA_GET(base, outbox, QUERY_FW_CMD_DB_BASE);
 798                 for (i = 0; i < MTHCA_CMD_NUM_DBELL_DWORDS; ++i)
 799                         MTHCA_GET(dev->cmd.dbell_offsets[i], outbox,
 800                                   QUERY_FW_CMD_DB_OFFSET + (i << 1));
 801
 802                 mthca_setup_cmd_doorbells(dev, base);
 803         }
 804
 805         if (mthca_is_memfree(dev)) {
 806                 MTHCA_GET(dev->fw.arbel.fw_pages,       outbox, QUERY_FW_SIZE_OFFSET);
 807                 MTHCA_GET(dev->fw.arbel.clr_int_base,   outbox, QUERY_FW_CLR_INT_BASE_OFFSET);
 808                 MTHCA_GET(dev->fw.arbel.eq_arm_base,    outbox, QUERY_FW_EQ_ARM_BASE_OFFSET);
 809                 MTHCA_GET(dev->fw.arbel.eq_set_ci_base, outbox, QUERY_FW_EQ_SET_CI_BASE_OFFSET);
 810                 mthca_dbg(dev, "FW size %d KB\n", dev->fw.arbel.fw_pages << 2);
 811
 812                 /*
 813                  * Round up number of system pages needed in case
 814                  * MTHCA_ICM_PAGE_SIZE < PAGE_SIZE.
 815                  */
 816                 dev->fw.arbel.fw_pages =
 817                         ALIGN(dev->fw.arbel.fw_pages, PAGE_SIZE / MTHCA_ICM_PAGE_SIZE) >>
 818                                 (PAGE_SHIFT - MTHCA_ICM_PAGE_SHIFT);
 819
 820                 mthca_dbg(dev, "Clear int @ %llx, EQ arm @ %llx, EQ set CI @ %llx\n",
 821                           (unsigned long long) dev->fw.arbel.clr_int_base,
 822                           (unsigned long long) dev->fw.arbel.eq_arm_base,
 823                           (unsigned long long) dev->fw.arbel.eq_set_ci_base);
 824         } else {
 825                 MTHCA_GET(dev->fw.tavor.fw_start, outbox, QUERY_FW_START_OFFSET);
 826                 MTHCA_GET(dev->fw.tavor.fw_end,   outbox, QUERY_FW_END_OFFSET);
 827
 828                 mthca_dbg(dev, "FW size %d KB (start %llx, end %llx)\n",
 829                           (int) ((dev->fw.tavor.fw_end - dev->fw.tavor.fw_start) >> 10),
 830                           (unsigned long long) dev->fw.tavor.fw_start,
 831                           (unsigned long long) dev->fw.tavor.fw_end);
 832         }
 833
 834 out:
 835         mthca_free_mailbox(dev, mailbox);
 836         return err;
 837 }
 838
 839 int mthca_ENABLE_LAM(struct mthca_dev *dev, u8 *status)
 840 {
 841         struct mthca_mailbox *mailbox;
 842         u8 info;
 843         u32 *outbox;
 844         int err = 0;
 845
 846 #define ENABLE_LAM_OUT_SIZE         0x100
 847 #define ENABLE_LAM_START_OFFSET     0x00
 848 #define ENABLE_LAM_END_OFFSET       0x08
 849 #define ENABLE_LAM_INFO_OFFSET      0x13
 850
 851 #define ENABLE_LAM_INFO_HIDDEN_FLAG (1 << 4)
 852 #define ENABLE_LAM_INFO_ECC_MASK    0x3
 853
 854         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 855         if (IS_ERR(mailbox))
 856                 return PTR_ERR(mailbox);
 857         outbox = mailbox->buf;
 858
 859         err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_ENABLE_LAM,
 860                             CMD_TIME_CLASS_C, status);
 861
 862         if (err)
 863                 goto out;
 864
 865         if (*status == MTHCA_CMD_STAT_LAM_NOT_PRE)
 866                 goto out;
 867
 868         MTHCA_GET(dev->ddr_start, outbox, ENABLE_LAM_START_OFFSET);
 869         MTHCA_GET(dev->ddr_end,   outbox, ENABLE_LAM_END_OFFSET);
 870         MTHCA_GET(info,           outbox, ENABLE_LAM_INFO_OFFSET);
 871
 872         if (!!(info & ENABLE_LAM_INFO_HIDDEN_FLAG) !=
 873             !!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
 874                 mthca_info(dev, "FW reports that HCA-attached memory "
 875                            "is %s hidden; does not match PCI config\n",
 876                            (info & ENABLE_LAM_INFO_HIDDEN_FLAG) ?
 877                            "" : "not");
 878         }
 879         if (info & ENABLE_LAM_INFO_HIDDEN_FLAG)
 880                 mthca_dbg(dev, "HCA-attached memory is hidden.\n");
 881
 882         mthca_dbg(dev, "HCA memory size %d KB (start %llx, end %llx)\n",
 883                   (int) ((dev->ddr_end - dev->ddr_start) >> 10),
 884                   (unsigned long long) dev->ddr_start,
 885                   (unsigned long long) dev->ddr_end);
 886
 887 out:
 888         mthca_free_mailbox(dev, mailbox);
 889         return err;
 890 }
 891
 892 int mthca_DISABLE_LAM(struct mthca_dev *dev, u8 *status)
 893 {
 894         return mthca_cmd(dev, 0, 0, 0, CMD_SYS_DIS, CMD_TIME_CLASS_C, status);
 895 }
 896
 897 int mthca_QUERY_DDR(struct mthca_dev *dev, u8 *status)
 898 {
 899         struct mthca_mailbox *mailbox;
 900         u8 info;
 901         u32 *outbox;
 902         int err = 0;
 903
 904 #define QUERY_DDR_OUT_SIZE         0x100
 905 #define QUERY_DDR_START_OFFSET     0x00
 906 #define QUERY_DDR_END_OFFSET       0x08
 907 #define QUERY_DDR_INFO_OFFSET      0x13
 908
 909 #define QUERY_DDR_INFO_HIDDEN_FLAG (1 << 4)
 910 #define QUERY_DDR_INFO_ECC_MASK    0x3
 911
 912         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
 913         if (IS_ERR(mailbox))
 914                 return PTR_ERR(mailbox);
 915         outbox = mailbox->buf;
 916
 917         err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_DDR,
 918                             CMD_TIME_CLASS_A, status);
 919
 920         if (err)
 921                 goto out;
 922
 923         MTHCA_GET(dev->ddr_start, outbox, QUERY_DDR_START_OFFSET);
 924         MTHCA_GET(dev->ddr_end,   outbox, QUERY_DDR_END_OFFSET);
 925         MTHCA_GET(info,           outbox, QUERY_DDR_INFO_OFFSET);
 926
 927         if (!!(info & QUERY_DDR_INFO_HIDDEN_FLAG) !=
 928             !!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
 929                 mthca_info(dev, "FW reports that HCA-attached memory "
 930                            "is %s hidden; does not match PCI config\n",
 931                            (info & QUERY_DDR_INFO_HIDDEN_FLAG) ?
 932                            "" : "not");
 933         }
 934         if (info & QUERY_DDR_INFO_HIDDEN_FLAG)
 935                 mthca_dbg(dev, "HCA-attached memory is hidden.\n");
 936
 937         mthca_dbg(dev, "HCA memory size %d KB (start %llx, end %llx)\n",
 938                   (int) ((dev->ddr_end - dev->ddr_start) >> 10),
 939                   (unsigned long long) dev->ddr_start,
 940                   (unsigned long long) dev->ddr_end);
 941
 942 out:
 943         mthca_free_mailbox(dev, mailbox);
 944         return err;
 945 }
 946
 947 int mthca_QUERY_DEV_LIM(struct mthca_dev *dev,
 948                         struct mthca_dev_lim *dev_lim, u8 *status)
 949 {
 950         struct mthca_mailbox *mailbox;
 951         u32 *outbox;
 952         u8 field;
 953         u16 size;
 954         u16 stat_rate;
 955         int err;
 956
 957 #define QUERY_DEV_LIM_OUT_SIZE             0x100
 958 #define QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET     0x10
 959 #define QUERY_DEV_LIM_MAX_QP_SZ_OFFSET      0x11
 960 #define QUERY_DEV_LIM_RSVD_QP_OFFSET        0x12
 961 #define QUERY_DEV_LIM_MAX_QP_OFFSET         0x13
 962 #define QUERY_DEV_LIM_RSVD_SRQ_OFFSET       0x14
 963 #define QUERY_DEV_LIM_MAX_SRQ_OFFSET        0x15
 964 #define QUERY_DEV_LIM_RSVD_EEC_OFFSET       0x16
 965 #define QUERY_DEV_LIM_MAX_EEC_OFFSET        0x17
 966 #define QUERY_DEV_LIM_MAX_CQ_SZ_OFFSET      0x19
 967 #define QUERY_DEV_LIM_RSVD_CQ_OFFSET        0x1a
 968 #define QUERY_DEV_LIM_MAX_CQ_OFFSET         0x1b
 969 #define QUERY_DEV_LIM_MAX_MPT_OFFSET        0x1d
 970 #define QUERY_DEV_LIM_RSVD_EQ_OFFSET        0x1e
 971 #define QUERY_DEV_LIM_MAX_EQ_OFFSET         0x1f
 972 #define QUERY_DEV_LIM_RSVD_MTT_OFFSET       0x20
 973 #define QUERY_DEV_LIM_MAX_MRW_SZ_OFFSET     0x21
 974 #define QUERY_DEV_LIM_RSVD_MRW_OFFSET       0x22
 975 #define QUERY_DEV_LIM_MAX_MTT_SEG_OFFSET    0x23
 976 #define QUERY_DEV_LIM_MAX_AV_OFFSET         0x27
 977 #define QUERY_DEV_LIM_MAX_REQ_QP_OFFSET     0x29
 978 #define QUERY_DEV_LIM_MAX_RES_QP_OFFSET     0x2b
 979 #define QUERY_DEV_LIM_MAX_RDMA_OFFSET       0x2f
 980 #define QUERY_DEV_LIM_RSZ_SRQ_OFFSET        0x33
 981 #define QUERY_DEV_LIM_ACK_DELAY_OFFSET      0x35
 982 #define QUERY_DEV_LIM_MTU_WIDTH_OFFSET      0x36
 983 #define QUERY_DEV_LIM_VL_PORT_OFFSET        0x37
 984 #define QUERY_DEV_LIM_MAX_GID_OFFSET        0x3b
 985 #define QUERY_DEV_LIM_RATE_SUPPORT_OFFSET   0x3c
 986 #define QUERY_DEV_LIM_MAX_PKEY_OFFSET       0x3f
 987 #define QUERY_DEV_LIM_FLAGS_OFFSET          0x44
 988 #define QUERY_DEV_LIM_RSVD_UAR_OFFSET       0x48
 989 #define QUERY_DEV_LIM_UAR_SZ_OFFSET         0x49
 990 #define QUERY_DEV_LIM_PAGE_SZ_OFFSET        0x4b
 991 #define QUERY_DEV_LIM_MAX_SG_OFFSET         0x51
 992 #define QUERY_DEV_LIM_MAX_DESC_SZ_OFFSET    0x52
 993 #define QUERY_DEV_LIM_MAX_SG_RQ_OFFSET      0x55
 994 #define QUERY_DEV_LIM_MAX_DESC_SZ_RQ_OFFSET 0x56
 995 #define QUERY_DEV_LIM_MAX_QP_MCG_OFFSET     0x61
 996 #define QUERY_DEV_LIM_RSVD_MCG_OFFSET       0x62
 997 #define QUERY_DEV_LIM_MAX_MCG_OFFSET        0x63
 998 #define QUERY_DEV_LIM_RSVD_PD_OFFSET        0x64
 999 #define QUERY_DEV_LIM_MAX_PD_OFFSET         0x65
1000 #define QUERY_DEV_LIM_RSVD_RDD_OFFSET       0x66
1001 #define QUERY_DEV_LIM_MAX_RDD_OFFSET        0x67
1002 #define QUERY_DEV_LIM_EEC_ENTRY_SZ_OFFSET   0x80
1003 #define QUERY_DEV_LIM_QPC_ENTRY_SZ_OFFSET   0x82
1004 #define QUERY_DEV_LIM_EEEC_ENTRY_SZ_OFFSET  0x84
1005 #define QUERY_DEV_LIM_EQPC_ENTRY_SZ_OFFSET  0x86
1006 #define QUERY_DEV_LIM_EQC_ENTRY_SZ_OFFSET   0x88
1007 #define QUERY_DEV_LIM_CQC_ENTRY_SZ_OFFSET   0x8a
1008 #define QUERY_DEV_LIM_SRQ_ENTRY_SZ_OFFSET   0x8c
1009 #define QUERY_DEV_LIM_UAR_ENTRY_SZ_OFFSET   0x8e
1010 #define QUERY_DEV_LIM_MTT_ENTRY_SZ_OFFSET   0x90
1011 #define QUERY_DEV_LIM_MPT_ENTRY_SZ_OFFSET   0x92
1012 #define QUERY_DEV_LIM_PBL_SZ_OFFSET         0x96
1013 #define QUERY_DEV_LIM_BMME_FLAGS_OFFSET     0x97
1014 #define QUERY_DEV_LIM_RSVD_LKEY_OFFSET      0x98
1015 #define QUERY_DEV_LIM_LAMR_OFFSET           0x9f
1016 #define QUERY_DEV_LIM_MAX_ICM_SZ_OFFSET     0xa0
1017
1018         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1019         if (IS_ERR(mailbox))
1020                 return PTR_ERR(mailbox);
1021         outbox = mailbox->buf;
1022
1023         err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_DEV_LIM,
1024                             CMD_TIME_CLASS_A, status);
1025
1026         if (err)
1027                 goto out;
1028
1029         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_QP_OFFSET);
1030         dev_lim->reserved_qps = 1 << (field & 0xf);
1031         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_OFFSET);
1032         dev_lim->max_qps = 1 << (field & 0x1f);
1033         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_SRQ_OFFSET);
1034         dev_lim->reserved_srqs = 1 << (field >> 4);
1035         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_OFFSET);
1036         dev_lim->max_srqs = 1 << (field & 0x1f);
1037         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_EEC_OFFSET);
1038         dev_lim->reserved_eecs = 1 << (field & 0xf);
1039         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_EEC_OFFSET);
1040         dev_lim->max_eecs = 1 << (field & 0x1f);
1041         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_CQ_SZ_OFFSET);
1042         dev_lim->max_cq_sz = 1 << field;
1043         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_CQ_OFFSET);
1044         dev_lim->reserved_cqs = 1 << (field & 0xf);
1045         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_CQ_OFFSET);
1046         dev_lim->max_cqs = 1 << (field & 0x1f);
1047         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MPT_OFFSET);
1048         dev_lim->max_mpts = 1 << (field & 0x3f);
1049         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_EQ_OFFSET);
1050         dev_lim->reserved_eqs = 1 << (field & 0xf);
1051         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_EQ_OFFSET);
1052         dev_lim->max_eqs = 1 << (field & 0x7);
1053         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MTT_OFFSET);
1054         if (mthca_is_memfree(dev))
1055                 dev_lim->reserved_mtts = ALIGN((1 << (field >> 4)) * sizeof(u64),
1056                                                MTHCA_MTT_SEG_SIZE) / MTHCA_MTT_SEG_SIZE;
1057         else
1058                 dev_lim->reserved_mtts = 1 << (field >> 4);
1059         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MRW_SZ_OFFSET);
1060         dev_lim->max_mrw_sz = 1 << field;
1061         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MRW_OFFSET);
1062         dev_lim->reserved_mrws = 1 << (field & 0xf);
1063         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MTT_SEG_OFFSET);
1064         dev_lim->max_mtt_seg = 1 << (field & 0x3f);
1065         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_REQ_QP_OFFSET);
1066         dev_lim->max_requester_per_qp = 1 << (field & 0x3f);
1067         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_RES_QP_OFFSET);
1068         dev_lim->max_responder_per_qp = 1 << (field & 0x3f);
1069         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_RDMA_OFFSET);
1070         dev_lim->max_rdma_global = 1 << (field & 0x3f);
1071         MTHCA_GET(field, outbox, QUERY_DEV_LIM_ACK_DELAY_OFFSET);
1072         dev_lim->local_ca_ack_delay = field & 0x1f;
1073         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MTU_WIDTH_OFFSET);
1074         dev_lim->max_mtu        = field >> 4;
1075         dev_lim->max_port_width = field & 0xf;
1076         MTHCA_GET(field, outbox, QUERY_DEV_LIM_VL_PORT_OFFSET);
1077         dev_lim->max_vl    = field >> 4;
1078         dev_lim->num_ports = field & 0xf;
1079         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_GID_OFFSET);
1080         dev_lim->max_gids = 1 << (field & 0xf);
1081         MTHCA_GET(stat_rate, outbox, QUERY_DEV_LIM_RATE_SUPPORT_OFFSET);
1082         dev_lim->stat_rate_support = stat_rate;
1083         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_PKEY_OFFSET);
1084         dev_lim->max_pkeys = 1 << (field & 0xf);
1085         MTHCA_GET(dev_lim->flags, outbox, QUERY_DEV_LIM_FLAGS_OFFSET);
1086         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_UAR_OFFSET);
1087         dev_lim->reserved_uars = field >> 4;
1088         MTHCA_GET(field, outbox, QUERY_DEV_LIM_UAR_SZ_OFFSET);
1089         dev_lim->uar_size = 1 << ((field & 0x3f) + 20);
1090         MTHCA_GET(field, outbox, QUERY_DEV_LIM_PAGE_SZ_OFFSET);
1091         dev_lim->min_page_sz = 1 << field;
1092         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SG_OFFSET);
1093         dev_lim->max_sg = field;
1094
1095         MTHCA_GET(size, outbox, QUERY_DEV_LIM_MAX_DESC_SZ_OFFSET);
1096         dev_lim->max_desc_sz = size;
1097
1098         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_MCG_OFFSET);
1099         dev_lim->max_qp_per_mcg = 1 << field;
1100         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MCG_OFFSET);
1101         dev_lim->reserved_mgms = field & 0xf;
1102         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MCG_OFFSET);
1103         dev_lim->max_mcgs = 1 << field;
1104         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_PD_OFFSET);
1105         dev_lim->reserved_pds = field >> 4;
1106         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_PD_OFFSET);
1107         dev_lim->max_pds = 1 << (field & 0x3f);
1108         MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_RDD_OFFSET);
1109         dev_lim->reserved_rdds = field >> 4;
1110         MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_RDD_OFFSET);
1111         dev_lim->max_rdds = 1 << (field & 0x3f);
1112
1113         MTHCA_GET(size, outbox, QUERY_DEV_LIM_EEC_ENTRY_SZ_OFFSET);
1114         dev_lim->eec_entry_sz = size;
1115         MTHCA_GET(size, outbox, QUERY_DEV_LIM_QPC_ENTRY_SZ_OFFSET);
1116         dev_lim->qpc_entry_sz = size;
1117         MTHCA_GET(size, outbox, QUERY_DEV_LIM_EEEC_ENTRY_SZ_OFFSET);
1118         dev_lim->eeec_entry_sz = size;
1119         MTHCA_GET(size, outbox, QUERY_DEV_LIM_EQPC_ENTRY_SZ_OFFSET);
1120         dev_lim->eqpc_entry_sz = size;
1121         MTHCA_GET(size, outbox, QUERY_DEV_LIM_EQC_ENTRY_SZ_OFFSET);
1122         dev_lim->eqc_entry_sz = size;
1123         MTHCA_GET(size, outbox, QUERY_DEV_LIM_CQC_ENTRY_SZ_OFFSET);
1124         dev_lim->cqc_entry_sz = size;
1125         MTHCA_GET(size, outbox, QUERY_DEV_LIM_SRQ_ENTRY_SZ_OFFSET);
1126         dev_lim->srq_entry_sz = size;
1127         MTHCA_GET(size, outbox, QUERY_DEV_LIM_UAR_ENTRY_SZ_OFFSET);
1128         dev_lim->uar_scratch_entry_sz = size;
1129
1130         if (mthca_is_memfree(dev)) {
1131                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET);
1132                 dev_lim->max_srq_sz = 1 << field;
1133                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET);
1134                 dev_lim->max_qp_sz = 1 << field;
1135                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSZ_SRQ_OFFSET);
1136                 dev_lim->hca.arbel.resize_srq = field & 1;
1137                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SG_RQ_OFFSET);
1138                 dev_lim->max_sg = min_t(int, field, dev_lim->max_sg);
1139                 MTHCA_GET(size, outbox, QUERY_DEV_LIM_MAX_DESC_SZ_RQ_OFFSET);
1140                 dev_lim->max_desc_sz = min_t(int, size, dev_lim->max_desc_sz);
1141                 MTHCA_GET(size, outbox, QUERY_DEV_LIM_MPT_ENTRY_SZ_OFFSET);
1142                 dev_lim->mpt_entry_sz = size;
1143                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_PBL_SZ_OFFSET);
1144                 dev_lim->hca.arbel.max_pbl_sz = 1 << (field & 0x3f);
1145                 MTHCA_GET(dev_lim->hca.arbel.bmme_flags, outbox,
1146                           QUERY_DEV_LIM_BMME_FLAGS_OFFSET);
1147                 MTHCA_GET(dev_lim->hca.arbel.reserved_lkey, outbox,
1148                           QUERY_DEV_LIM_RSVD_LKEY_OFFSET);
1149                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_LAMR_OFFSET);
1150                 dev_lim->hca.arbel.lam_required = field & 1;
1151                 MTHCA_GET(dev_lim->hca.arbel.max_icm_sz, outbox,
1152                           QUERY_DEV_LIM_MAX_ICM_SZ_OFFSET);
1153
1154                 if (dev_lim->hca.arbel.bmme_flags & 1)
1155                         mthca_dbg(dev, "Base MM extensions: yes "
1156                                   "(flags %d, max PBL %d, rsvd L_Key %08x)\n",
1157                                   dev_lim->hca.arbel.bmme_flags,
1158                                   dev_lim->hca.arbel.max_pbl_sz,
1159                                   dev_lim->hca.arbel.reserved_lkey);
1160                 else
1161                         mthca_dbg(dev, "Base MM extensions: no\n");
1162
1163                 mthca_dbg(dev, "Max ICM size %lld MB\n",
1164                           (unsigned long long) dev_lim->hca.arbel.max_icm_sz >> 20);
1165         } else {
1166                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_SRQ_SZ_OFFSET);
1167                 dev_lim->max_srq_sz = (1 << field) - 1;
1168                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_QP_SZ_OFFSET);
1169                 dev_lim->max_qp_sz = (1 << field) - 1;
1170                 MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_AV_OFFSET);
1171                 dev_lim->hca.tavor.max_avs = 1 << (field & 0x3f);
1172                 dev_lim->mpt_entry_sz = MTHCA_MPT_ENTRY_SIZE;
1173         }
1174
1175         mthca_dbg(dev, "Max QPs: %d, reserved QPs: %d, entry size: %d\n",
1176                   dev_lim->max_qps, dev_lim->reserved_qps, dev_lim->qpc_entry_sz);
1177         mthca_dbg(dev, "Max SRQs: %d, reserved SRQs: %d, entry size: %d\n",
1178                   dev_lim->max_srqs, dev_lim->reserved_srqs, dev_lim->srq_entry_sz);
1179         mthca_dbg(dev, "Max CQs: %d, reserved CQs: %d, entry size: %d\n",
1180                   dev_lim->max_cqs, dev_lim->reserved_cqs, dev_lim->cqc_entry_sz);
1181         mthca_dbg(dev, "Max EQs: %d, reserved EQs: %d, entry size: %d\n",
1182                   dev_lim->max_eqs, dev_lim->reserved_eqs, dev_lim->eqc_entry_sz);
1183         mthca_dbg(dev, "reserved MPTs: %d, reserved MTTs: %d\n",
1184                   dev_lim->reserved_mrws, dev_lim->reserved_mtts);
1185         mthca_dbg(dev, "Max PDs: %d, reserved PDs: %d, reserved UARs: %d\n",
1186                   dev_lim->max_pds, dev_lim->reserved_pds, dev_lim->reserved_uars);
1187         mthca_dbg(dev, "Max QP/MCG: %d, reserved MGMs: %d\n",
1188                   dev_lim->max_pds, dev_lim->reserved_mgms);
1189         mthca_dbg(dev, "Max CQEs: %d, max WQEs: %d, max SRQ WQEs: %d\n",
1190                   dev_lim->max_cq_sz, dev_lim->max_qp_sz, dev_lim->max_srq_sz);
1191
1192         mthca_dbg(dev, "Flags: %08x\n", dev_lim->flags);
1193
1194 out:
1195         mthca_free_mailbox(dev, mailbox);
1196         return err;
1197 }
1198
1199 static void get_board_id(void *vsd, char *board_id)
1200 {
1201         int i;
1202
1203 #define VSD_OFFSET_SIG1         0x00
1204 #define VSD_OFFSET_SIG2         0xde
1205 #define VSD_OFFSET_MLX_BOARD_ID 0xd0
1206 #define VSD_OFFSET_TS_BOARD_ID  0x20
1207
1208 #define VSD_SIGNATURE_TOPSPIN   0x5ad
1209
1210         memset(board_id, 0, MTHCA_BOARD_ID_LEN);
1211
1212         if (be16_to_cpup(vsd + VSD_OFFSET_SIG1) == VSD_SIGNATURE_TOPSPIN &&
1213             be16_to_cpup(vsd + VSD_OFFSET_SIG2) == VSD_SIGNATURE_TOPSPIN) {
1214                 strlcpy(board_id, vsd + VSD_OFFSET_TS_BOARD_ID, MTHCA_BOARD_ID_LEN);
1215         } else {
1216                 /*
1217                  * The board ID is a string but the firmware byte
1218                  * swaps each 4-byte word before passing it back to
1219                  * us.  Therefore we need to swab it before printing.
1220                  */
1221                 for (i = 0; i < 4; ++i)
1222                         ((u32 *) board_id)[i] =
1223                                 swab32(*(u32 *) (vsd + VSD_OFFSET_MLX_BOARD_ID + i * 4));
1224         }
1225 }
1226
1227 int mthca_QUERY_ADAPTER(struct mthca_dev *dev,
1228                         struct mthca_adapter *adapter, u8 *status)
1229 {
1230         struct mthca_mailbox *mailbox;
1231         u32 *outbox;
1232         int err;
1233
1234 #define QUERY_ADAPTER_OUT_SIZE             0x100
1235 #define QUERY_ADAPTER_VENDOR_ID_OFFSET     0x00
1236 #define QUERY_ADAPTER_DEVICE_ID_OFFSET     0x04
1237 #define QUERY_ADAPTER_REVISION_ID_OFFSET   0x08
1238 #define QUERY_ADAPTER_INTA_PIN_OFFSET      0x10
1239 #define QUERY_ADAPTER_VSD_OFFSET           0x20
1240
1241         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1242         if (IS_ERR(mailbox))
1243                 return PTR_ERR(mailbox);
1244         outbox = mailbox->buf;
1245
1246         err = mthca_cmd_box(dev, 0, mailbox->dma, 0, 0, CMD_QUERY_ADAPTER,
1247                             CMD_TIME_CLASS_A, status);
1248
1249         if (err)
1250                 goto out;
1251
1252         MTHCA_GET(adapter->vendor_id, outbox,   QUERY_ADAPTER_VENDOR_ID_OFFSET);
1253         MTHCA_GET(adapter->device_id, outbox,   QUERY_ADAPTER_DEVICE_ID_OFFSET);
1254         MTHCA_GET(adapter->revision_id, outbox, QUERY_ADAPTER_REVISION_ID_OFFSET);
1255         MTHCA_GET(adapter->inta_pin, outbox,    QUERY_ADAPTER_INTA_PIN_OFFSET);
1256
1257         get_board_id(outbox + QUERY_ADAPTER_VSD_OFFSET / 4,
1258                      adapter->board_id);
1259
1260 out:
1261         mthca_free_mailbox(dev, mailbox);
1262         return err;
1263 }
1264
1265 int mthca_INIT_HCA(struct mthca_dev *dev,
1266                    struct mthca_init_hca_param *param,
1267                    u8 *status)
1268 {
1269         struct mthca_mailbox *mailbox;
1270         __be32 *inbox;
1271         int err;
1272
1273 #define INIT_HCA_IN_SIZE                 0x200
1274 #define INIT_HCA_FLAGS1_OFFSET           0x00c
1275 #define INIT_HCA_FLAGS2_OFFSET           0x014
1276 #define INIT_HCA_QPC_OFFSET              0x020
1277 #define  INIT_HCA_QPC_BASE_OFFSET        (INIT_HCA_QPC_OFFSET + 0x10)
1278 #define  INIT_HCA_LOG_QP_OFFSET          (INIT_HCA_QPC_OFFSET + 0x17)
1279 #define  INIT_HCA_EEC_BASE_OFFSET        (INIT_HCA_QPC_OFFSET + 0x20)
1280 #define  INIT_HCA_LOG_EEC_OFFSET         (INIT_HCA_QPC_OFFSET + 0x27)
1281 #define  INIT_HCA_SRQC_BASE_OFFSET       (INIT_HCA_QPC_OFFSET + 0x28)
1282 #define  INIT_HCA_LOG_SRQ_OFFSET         (INIT_HCA_QPC_OFFSET + 0x2f)
1283 #define  INIT_HCA_CQC_BASE_OFFSET        (INIT_HCA_QPC_OFFSET + 0x30)
1284 #define  INIT_HCA_LOG_CQ_OFFSET          (INIT_HCA_QPC_OFFSET + 0x37)
1285 #define  INIT_HCA_EQPC_BASE_OFFSET       (INIT_HCA_QPC_OFFSET + 0x40)
1286 #define  INIT_HCA_EEEC_BASE_OFFSET       (INIT_HCA_QPC_OFFSET + 0x50)
1287 #define  INIT_HCA_EQC_BASE_OFFSET        (INIT_HCA_QPC_OFFSET + 0x60)
1288 #define  INIT_HCA_LOG_EQ_OFFSET          (INIT_HCA_QPC_OFFSET + 0x67)
1289 #define  INIT_HCA_RDB_BASE_OFFSET        (INIT_HCA_QPC_OFFSET + 0x70)
1290 #define INIT_HCA_UDAV_OFFSET             0x0b0
1291 #define  INIT_HCA_UDAV_LKEY_OFFSET       (INIT_HCA_UDAV_OFFSET + 0x0)
1292 #define  INIT_HCA_UDAV_PD_OFFSET         (INIT_HCA_UDAV_OFFSET + 0x4)
1293 #define INIT_HCA_MCAST_OFFSET            0x0c0
1294 #define  INIT_HCA_MC_BASE_OFFSET         (INIT_HCA_MCAST_OFFSET + 0x00)
1295 #define  INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x12)
1296 #define  INIT_HCA_MC_HASH_SZ_OFFSET      (INIT_HCA_MCAST_OFFSET + 0x16)
1297 #define  INIT_HCA_LOG_MC_TABLE_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x1b)
1298 #define INIT_HCA_TPT_OFFSET              0x0f0
1299 #define  INIT_HCA_MPT_BASE_OFFSET        (INIT_HCA_TPT_OFFSET + 0x00)
1300 #define  INIT_HCA_MTT_SEG_SZ_OFFSET      (INIT_HCA_TPT_OFFSET + 0x09)
1301 #define  INIT_HCA_LOG_MPT_SZ_OFFSET      (INIT_HCA_TPT_OFFSET + 0x0b)
1302 #define  INIT_HCA_MTT_BASE_OFFSET        (INIT_HCA_TPT_OFFSET + 0x10)
1303 #define INIT_HCA_UAR_OFFSET              0x120
1304 #define  INIT_HCA_UAR_BASE_OFFSET        (INIT_HCA_UAR_OFFSET + 0x00)
1305 #define  INIT_HCA_UARC_SZ_OFFSET         (INIT_HCA_UAR_OFFSET + 0x09)
1306 #define  INIT_HCA_LOG_UAR_SZ_OFFSET      (INIT_HCA_UAR_OFFSET + 0x0a)
1307 #define  INIT_HCA_UAR_PAGE_SZ_OFFSET     (INIT_HCA_UAR_OFFSET + 0x0b)
1308 #define  INIT_HCA_UAR_SCATCH_BASE_OFFSET (INIT_HCA_UAR_OFFSET + 0x10)
1309 #define  INIT_HCA_UAR_CTX_BASE_OFFSET    (INIT_HCA_UAR_OFFSET + 0x18)
1310
1311         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1312         if (IS_ERR(mailbox))
1313                 return PTR_ERR(mailbox);
1314         inbox = mailbox->buf;
1315
1316         memset(inbox, 0, INIT_HCA_IN_SIZE);
1317
1318         if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
1319                 MTHCA_PUT(inbox, 0x1, INIT_HCA_FLAGS1_OFFSET);
1320
1321 #if defined(__LITTLE_ENDIAN)
1322         *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) &= ~cpu_to_be32(1 << 1);
1323 #elif defined(__BIG_ENDIAN)
1324         *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(1 << 1);
1325 #else
1326 #error Host endianness not defined
1327 #endif
1328         /* Check port for UD address vector: */
1329         *(inbox + INIT_HCA_FLAGS2_OFFSET / 4) |= cpu_to_be32(1);
1330
1331         /* We leave wqe_quota, responder_exu, etc as 0 (default) */
1332
1333         /* QPC/EEC/CQC/EQC/RDB attributes */
1334
1335         MTHCA_PUT(inbox, param->qpc_base,     INIT_HCA_QPC_BASE_OFFSET);
1336         MTHCA_PUT(inbox, param->log_num_qps,  INIT_HCA_LOG_QP_OFFSET);
1337         MTHCA_PUT(inbox, param->eec_base,     INIT_HCA_EEC_BASE_OFFSET);
1338         MTHCA_PUT(inbox, param->log_num_eecs, INIT_HCA_LOG_EEC_OFFSET);
1339         MTHCA_PUT(inbox, param->srqc_base,    INIT_HCA_SRQC_BASE_OFFSET);
1340         MTHCA_PUT(inbox, param->log_num_srqs, INIT_HCA_LOG_SRQ_OFFSET);
1341         MTHCA_PUT(inbox, param->cqc_base,     INIT_HCA_CQC_BASE_OFFSET);
1342         MTHCA_PUT(inbox, param->log_num_cqs,  INIT_HCA_LOG_CQ_OFFSET);
1343         MTHCA_PUT(inbox, param->eqpc_base,    INIT_HCA_EQPC_BASE_OFFSET);
1344         MTHCA_PUT(inbox, param->eeec_base,    INIT_HCA_EEEC_BASE_OFFSET);
1345         MTHCA_PUT(inbox, param->eqc_base,     INIT_HCA_EQC_BASE_OFFSET);
1346         MTHCA_PUT(inbox, param->log_num_eqs,  INIT_HCA_LOG_EQ_OFFSET);
1347         MTHCA_PUT(inbox, param->rdb_base,     INIT_HCA_RDB_BASE_OFFSET);
1348
1349         /* UD AV attributes */
1350
1351         /* multicast attributes */
1352
1353         MTHCA_PUT(inbox, param->mc_base,         INIT_HCA_MC_BASE_OFFSET);
1354         MTHCA_PUT(inbox, param->log_mc_entry_sz, INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET);
1355         MTHCA_PUT(inbox, param->mc_hash_sz,      INIT_HCA_MC_HASH_SZ_OFFSET);
1356         MTHCA_PUT(inbox, param->log_mc_table_sz, INIT_HCA_LOG_MC_TABLE_SZ_OFFSET);
1357
1358         /* TPT attributes */
1359
1360         MTHCA_PUT(inbox, param->mpt_base,   INIT_HCA_MPT_BASE_OFFSET);
1361         if (!mthca_is_memfree(dev))
1362                 MTHCA_PUT(inbox, param->mtt_seg_sz, INIT_HCA_MTT_SEG_SZ_OFFSET);
1363         MTHCA_PUT(inbox, param->log_mpt_sz, INIT_HCA_LOG_MPT_SZ_OFFSET);
1364         MTHCA_PUT(inbox, param->mtt_base,   INIT_HCA_MTT_BASE_OFFSET);
1365
1366         /* UAR attributes */
1367         {
1368                 u8 uar_page_sz = PAGE_SHIFT - 12;
1369                 MTHCA_PUT(inbox, uar_page_sz, INIT_HCA_UAR_PAGE_SZ_OFFSET);
1370         }
1371
1372         MTHCA_PUT(inbox, param->uar_scratch_base, INIT_HCA_UAR_SCATCH_BASE_OFFSET);
1373
1374         if (mthca_is_memfree(dev)) {
1375                 MTHCA_PUT(inbox, param->log_uarc_sz, INIT_HCA_UARC_SZ_OFFSET);
1376                 MTHCA_PUT(inbox, param->log_uar_sz,  INIT_HCA_LOG_UAR_SZ_OFFSET);
1377                 MTHCA_PUT(inbox, param->uarc_base,   INIT_HCA_UAR_CTX_BASE_OFFSET);
1378         }
1379
1380         err = mthca_cmd(dev, mailbox->dma, 0, 0, CMD_INIT_HCA, HZ, status);
1381
1382         mthca_free_mailbox(dev, mailbox);
1383         return err;
1384 }
1385
1386 int mthca_INIT_IB(struct mthca_dev *dev,
1387                   struct mthca_init_ib_param *param,
1388                   int port, u8 *status)
1389 {
1390         struct mthca_mailbox *mailbox;
1391         u32 *inbox;
1392         int err;
1393         u32 flags;
1394
1395 #define INIT_IB_IN_SIZE          56
1396 #define INIT_IB_FLAGS_OFFSET     0x00
1397 #define INIT_IB_FLAG_SIG         (1 << 18)
1398 #define INIT_IB_FLAG_NG          (1 << 17)
1399 #define INIT_IB_FLAG_G0          (1 << 16)
1400 #define INIT_IB_VL_SHIFT         4
1401 #define INIT_IB_PORT_WIDTH_SHIFT 8
1402 #define INIT_IB_MTU_SHIFT        12
1403 #define INIT_IB_MAX_GID_OFFSET   0x06
1404 #define INIT_IB_MAX_PKEY_OFFSET  0x0a
1405 #define INIT_IB_GUID0_OFFSET     0x10
1406 #define INIT_IB_NODE_GUID_OFFSET 0x18
1407 #define INIT_IB_SI_GUID_OFFSET   0x20
1408
1409         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1410         if (IS_ERR(mailbox))
1411                 return PTR_ERR(mailbox);
1412         inbox = mailbox->buf;
1413
1414         memset(inbox, 0, INIT_IB_IN_SIZE);
1415
1416         flags = 0;
1417         flags |= param->set_guid0     ? INIT_IB_FLAG_G0  : 0;
1418         flags |= param->set_node_guid ? INIT_IB_FLAG_NG  : 0;
1419         flags |= param->set_si_guid   ? INIT_IB_FLAG_SIG : 0;
1420         flags |= param->vl_cap << INIT_IB_VL_SHIFT;
1421         flags |= param->port_width << INIT_IB_PORT_WIDTH_SHIFT;
1422         flags |= param->mtu_cap << INIT_IB_MTU_SHIFT;
1423         MTHCA_PUT(inbox, flags, INIT_IB_FLAGS_OFFSET);
1424
1425         MTHCA_PUT(inbox, param->gid_cap,   INIT_IB_MAX_GID_OFFSET);
1426         MTHCA_PUT(inbox, param->pkey_cap,  INIT_IB_MAX_PKEY_OFFSET);
1427         MTHCA_PUT(inbox, param->guid0,     INIT_IB_GUID0_OFFSET);
1428         MTHCA_PUT(inbox, param->node_guid, INIT_IB_NODE_GUID_OFFSET);
1429         MTHCA_PUT(inbox, param->si_guid,   INIT_IB_SI_GUID_OFFSET);
1430
1431         err = mthca_cmd(dev, mailbox->dma, port, 0, CMD_INIT_IB,
1432                         CMD_TIME_CLASS_A, status);
1433
1434         mthca_free_mailbox(dev, mailbox);
1435         return err;
1436 }
1437
1438 int mthca_CLOSE_IB(struct mthca_dev *dev, int port, u8 *status)
1439 {
1440         return mthca_cmd(dev, 0, port, 0, CMD_CLOSE_IB, HZ, status);
1441 }
1442
1443 int mthca_CLOSE_HCA(struct mthca_dev *dev, int panic, u8 *status)
1444 {
1445         return mthca_cmd(dev, 0, 0, panic, CMD_CLOSE_HCA, HZ, status);
1446 }
1447
1448 int mthca_SET_IB(struct mthca_dev *dev, struct mthca_set_ib_param *param,
1449                  int port, u8 *status)
1450 {
1451         struct mthca_mailbox *mailbox;
1452         u32 *inbox;
1453         int err;
1454         u32 flags = 0;
1455
1456 #define SET_IB_IN_SIZE         0x40
1457 #define SET_IB_FLAGS_OFFSET    0x00
1458 #define SET_IB_FLAG_SIG        (1 << 18)
1459 #define SET_IB_FLAG_RQK        (1 <<  0)
1460 #define SET_IB_CAP_MASK_OFFSET 0x04
1461 #define SET_IB_SI_GUID_OFFSET  0x08
1462
1463         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1464         if (IS_ERR(mailbox))
1465                 return PTR_ERR(mailbox);
1466         inbox = mailbox->buf;
1467
1468         memset(inbox, 0, SET_IB_IN_SIZE);
1469
1470         flags |= param->set_si_guid     ? SET_IB_FLAG_SIG : 0;
1471         flags |= param->reset_qkey_viol ? SET_IB_FLAG_RQK : 0;
1472         MTHCA_PUT(inbox, flags, SET_IB_FLAGS_OFFSET);
1473
1474         MTHCA_PUT(inbox, param->cap_mask, SET_IB_CAP_MASK_OFFSET);
1475         MTHCA_PUT(inbox, param->si_guid,  SET_IB_SI_GUID_OFFSET);
1476
1477         err = mthca_cmd(dev, mailbox->dma, port, 0, CMD_SET_IB,
1478                         CMD_TIME_CLASS_B, status);
1479
1480         mthca_free_mailbox(dev, mailbox);
1481         return err;
1482 }
1483
1484 int mthca_MAP_ICM(struct mthca_dev *dev, struct mthca_icm *icm, u64 virt, u8 *status)
1485 {
1486         return mthca_map_cmd(dev, CMD_MAP_ICM, icm, virt, status);
1487 }
1488
1489 int mthca_MAP_ICM_page(struct mthca_dev *dev, u64 dma_addr, u64 virt, u8 *status)
1490 {
1491         struct mthca_mailbox *mailbox;
1492         __be64 *inbox;
1493         int err;
1494
1495         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1496         if (IS_ERR(mailbox))
1497                 return PTR_ERR(mailbox);
1498         inbox = mailbox->buf;
1499
1500         inbox[0] = cpu_to_be64(virt);
1501         inbox[1] = cpu_to_be64(dma_addr);
1502
1503         err = mthca_cmd(dev, mailbox->dma, 1, 0, CMD_MAP_ICM,
1504                         CMD_TIME_CLASS_B, status);
1505
1506         mthca_free_mailbox(dev, mailbox);
1507
1508         if (!err)
1509                 mthca_dbg(dev, "Mapped page at %llx to %llx for ICM.\n",
1510                           (unsigned long long) dma_addr, (unsigned long long) virt);
1511
1512         return err;
1513 }
1514
1515 int mthca_UNMAP_ICM(struct mthca_dev *dev, u64 virt, u32 page_count, u8 *status)
1516 {
1517         mthca_dbg(dev, "Unmapping %d pages at %llx from ICM.\n",
1518                   page_count, (unsigned long long) virt);
1519
1520         return mthca_cmd(dev, virt, page_count, 0, CMD_UNMAP_ICM, CMD_TIME_CLASS_B, status);
1521 }
1522
1523 int mthca_MAP_ICM_AUX(struct mthca_dev *dev, struct mthca_icm *icm, u8 *status)
1524 {
1525         return mthca_map_cmd(dev, CMD_MAP_ICM_AUX, icm, -1, status);
1526 }
1527
1528 int mthca_UNMAP_ICM_AUX(struct mthca_dev *dev, u8 *status)
1529 {
1530         return mthca_cmd(dev, 0, 0, 0, CMD_UNMAP_ICM_AUX, CMD_TIME_CLASS_B, status);
1531 }
1532
1533 int mthca_SET_ICM_SIZE(struct mthca_dev *dev, u64 icm_size, u64 *aux_pages,
1534                        u8 *status)
1535 {
1536         int ret = mthca_cmd_imm(dev, icm_size, aux_pages, 0, 0, CMD_SET_ICM_SIZE,
1537                                 CMD_TIME_CLASS_A, status);
1538
1539         if (ret || status)
1540                 return ret;
1541
1542         /*
1543          * Round up number of system pages needed in case
1544          * MTHCA_ICM_PAGE_SIZE < PAGE_SIZE.
1545          */
1546         *aux_pages = ALIGN(*aux_pages, PAGE_SIZE / MTHCA_ICM_PAGE_SIZE) >>
1547                 (PAGE_SHIFT - MTHCA_ICM_PAGE_SHIFT);
1548
1549         return 0;
1550 }
1551
1552 int mthca_SW2HW_MPT(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1553                     int mpt_index, u8 *status)
1554 {
1555         return mthca_cmd(dev, mailbox->dma, mpt_index, 0, CMD_SW2HW_MPT,
1556                          CMD_TIME_CLASS_B, status);
1557 }
1558
1559 int mthca_HW2SW_MPT(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1560                     int mpt_index, u8 *status)
1561 {
1562         return mthca_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index,
1563                              !mailbox, CMD_HW2SW_MPT,
1564                              CMD_TIME_CLASS_B, status);
1565 }
1566
1567 int mthca_WRITE_MTT(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1568                     int num_mtt, u8 *status)
1569 {
1570         return mthca_cmd(dev, mailbox->dma, num_mtt, 0, CMD_WRITE_MTT,
1571                          CMD_TIME_CLASS_B, status);
1572 }
1573
1574 int mthca_SYNC_TPT(struct mthca_dev *dev, u8 *status)
1575 {
1576         return mthca_cmd(dev, 0, 0, 0, CMD_SYNC_TPT, CMD_TIME_CLASS_B, status);
1577 }
1578
1579 int mthca_MAP_EQ(struct mthca_dev *dev, u64 event_mask, int unmap,
1580                  int eq_num, u8 *status)
1581 {
1582         mthca_dbg(dev, "%s mask %016llx for eqn %d\n",
1583                   unmap ? "Clearing" : "Setting",
1584                   (unsigned long long) event_mask, eq_num);
1585         return mthca_cmd(dev, event_mask, (unmap << 31) | eq_num,
1586                          0, CMD_MAP_EQ, CMD_TIME_CLASS_B, status);
1587 }
1588
1589 int mthca_SW2HW_EQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1590                    int eq_num, u8 *status)
1591 {
1592         return mthca_cmd(dev, mailbox->dma, eq_num, 0, CMD_SW2HW_EQ,
1593                          CMD_TIME_CLASS_A, status);
1594 }
1595
1596 int mthca_HW2SW_EQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1597                    int eq_num, u8 *status)
1598 {
1599         return mthca_cmd_box(dev, 0, mailbox->dma, eq_num, 0,
1600                              CMD_HW2SW_EQ,
1601                              CMD_TIME_CLASS_A, status);
1602 }
1603
1604 int mthca_SW2HW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1605                    int cq_num, u8 *status)
1606 {
1607         return mthca_cmd(dev, mailbox->dma, cq_num, 0, CMD_SW2HW_CQ,
1608                         CMD_TIME_CLASS_A, status);
1609 }
1610
1611 int mthca_HW2SW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1612                    int cq_num, u8 *status)
1613 {
1614         return mthca_cmd_box(dev, 0, mailbox->dma, cq_num, 0,
1615                              CMD_HW2SW_CQ,
1616                              CMD_TIME_CLASS_A, status);
1617 }
1618
1619 int mthca_RESIZE_CQ(struct mthca_dev *dev, int cq_num, u32 lkey, u8 log_size,
1620                     u8 *status)
1621 {
1622         struct mthca_mailbox *mailbox;
1623         __be32 *inbox;
1624         int err;
1625
1626 #define RESIZE_CQ_IN_SIZE               0x40
1627 #define RESIZE_CQ_LOG_SIZE_OFFSET       0x0c
1628 #define RESIZE_CQ_LKEY_OFFSET           0x1c
1629
1630         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1631         if (IS_ERR(mailbox))
1632                 return PTR_ERR(mailbox);
1633         inbox = mailbox->buf;
1634
1635         memset(inbox, 0, RESIZE_CQ_IN_SIZE);
1636         /*
1637          * Leave start address fields zeroed out -- mthca assumes that
1638          * MRs for CQs always start at virtual address 0.
1639          */
1640         MTHCA_PUT(inbox, log_size, RESIZE_CQ_LOG_SIZE_OFFSET);
1641         MTHCA_PUT(inbox, lkey,     RESIZE_CQ_LKEY_OFFSET);
1642
1643         err = mthca_cmd(dev, mailbox->dma, cq_num, 1, CMD_RESIZE_CQ,
1644                         CMD_TIME_CLASS_B, status);
1645
1646         mthca_free_mailbox(dev, mailbox);
1647         return err;
1648 }
1649
1650 int mthca_SW2HW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1651                     int srq_num, u8 *status)
1652 {
1653         return mthca_cmd(dev, mailbox->dma, srq_num, 0, CMD_SW2HW_SRQ,
1654                         CMD_TIME_CLASS_A, status);
1655 }
1656
1657 int mthca_HW2SW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1658                     int srq_num, u8 *status)
1659 {
1660         return mthca_cmd_box(dev, 0, mailbox->dma, srq_num, 0,
1661                              CMD_HW2SW_SRQ,
1662                              CMD_TIME_CLASS_A, status);
1663 }
1664
1665 int mthca_QUERY_SRQ(struct mthca_dev *dev, u32 num,
1666                     struct mthca_mailbox *mailbox, u8 *status)
1667 {
1668         return mthca_cmd_box(dev, 0, mailbox->dma, num, 0,
1669                              CMD_QUERY_SRQ, CMD_TIME_CLASS_A, status);
1670 }
1671
1672 int mthca_ARM_SRQ(struct mthca_dev *dev, int srq_num, int limit, u8 *status)
1673 {
1674         return mthca_cmd(dev, limit, srq_num, 0, CMD_ARM_SRQ,
1675                          CMD_TIME_CLASS_B, status);
1676 }
1677
1678 int mthca_MODIFY_QP(struct mthca_dev *dev, enum ib_qp_state cur,
1679                     enum ib_qp_state next, u32 num, int is_ee,
1680                     struct mthca_mailbox *mailbox, u32 optmask,
1681                     u8 *status)
1682 {
1683         static const u16 op[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
1684                 [IB_QPS_RESET] = {
1685                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1686                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1687                         [IB_QPS_INIT]   = CMD_RST2INIT_QPEE,
1688                 },
1689                 [IB_QPS_INIT]  = {
1690                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1691                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1692                         [IB_QPS_INIT]   = CMD_INIT2INIT_QPEE,
1693                         [IB_QPS_RTR]    = CMD_INIT2RTR_QPEE,
1694                 },
1695                 [IB_QPS_RTR]   = {
1696                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1697                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1698                         [IB_QPS_RTS]    = CMD_RTR2RTS_QPEE,
1699                 },
1700                 [IB_QPS_RTS]   = {
1701                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1702                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1703                         [IB_QPS_RTS]    = CMD_RTS2RTS_QPEE,
1704                         [IB_QPS_SQD]    = CMD_RTS2SQD_QPEE,
1705                 },
1706                 [IB_QPS_SQD] = {
1707                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1708                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1709                         [IB_QPS_RTS]    = CMD_SQD2RTS_QPEE,
1710                         [IB_QPS_SQD]    = CMD_SQD2SQD_QPEE,
1711                 },
1712                 [IB_QPS_SQE] = {
1713                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1714                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1715                         [IB_QPS_RTS]    = CMD_SQERR2RTS_QPEE,
1716                 },
1717                 [IB_QPS_ERR] = {
1718                         [IB_QPS_RESET]  = CMD_ERR2RST_QPEE,
1719                         [IB_QPS_ERR]    = CMD_2ERR_QPEE,
1720                 }
1721         };
1722
1723         u8 op_mod = 0;
1724         int my_mailbox = 0;
1725         int err;
1726
1727         if (op[cur][next] == CMD_ERR2RST_QPEE) {
1728                 op_mod = 3;     /* don't write outbox, any->reset */
1729
1730                 /* For debugging */
1731                 if (!mailbox) {
1732                         mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1733                         if (!IS_ERR(mailbox)) {
1734                                 my_mailbox = 1;
1735                                 op_mod     = 2; /* write outbox, any->reset */
1736                         } else
1737                                 mailbox = NULL;
1738                 }
1739
1740                 err = mthca_cmd_box(dev, 0, mailbox ? mailbox->dma : 0,
1741                                     (!!is_ee << 24) | num, op_mod,
1742                                     op[cur][next], CMD_TIME_CLASS_C, status);
1743
1744                 if (0 && mailbox) {
1745                         int i;
1746                         mthca_dbg(dev, "Dumping QP context:\n");
1747                         printk(" %08x\n", be32_to_cpup(mailbox->buf));
1748                         for (i = 0; i < 0x100 / 4; ++i) {
1749                                 if (i % 8 == 0)
1750                                         printk("[%02x] ", i * 4);
1751                                 printk(" %08x",
1752                                        be32_to_cpu(((__be32 *) mailbox->buf)[i + 2]));
1753                                 if ((i + 1) % 8 == 0)
1754                                         printk("\n");
1755                         }
1756                 }
1757
1758                 if (my_mailbox)
1759                         mthca_free_mailbox(dev, mailbox);
1760         } else {
1761                 if (0) {
1762                         int i;
1763                         mthca_dbg(dev, "Dumping QP context:\n");
1764                         printk("  opt param mask: %08x\n", be32_to_cpup(mailbox->buf));
1765                         for (i = 0; i < 0x100 / 4; ++i) {
1766                                 if (i % 8 == 0)
1767                                         printk("  [%02x] ", i * 4);
1768                                 printk(" %08x",
1769                                        be32_to_cpu(((__be32 *) mailbox->buf)[i + 2]));
1770                                 if ((i + 1) % 8 == 0)
1771                                         printk("\n");
1772                         }
1773                 }
1774
1775                 err = mthca_cmd(dev, mailbox->dma, optmask | (!!is_ee << 24) | num,
1776                                 op_mod, op[cur][next], CMD_TIME_CLASS_C, status);
1777         }
1778
1779         return err;
1780 }
1781
1782 int mthca_QUERY_QP(struct mthca_dev *dev, u32 num, int is_ee,
1783                    struct mthca_mailbox *mailbox, u8 *status)
1784 {
1785         return mthca_cmd_box(dev, 0, mailbox->dma, (!!is_ee << 24) | num, 0,
1786                              CMD_QUERY_QPEE, CMD_TIME_CLASS_A, status);
1787 }
1788
1789 int mthca_CONF_SPECIAL_QP(struct mthca_dev *dev, int type, u32 qpn,
1790                           u8 *status)
1791 {
1792         u8 op_mod;
1793
1794         switch (type) {
1795         case IB_QPT_SMI:
1796                 op_mod = 0;
1797                 break;
1798         case IB_QPT_GSI:
1799                 op_mod = 1;
1800                 break;
1801         case IB_QPT_RAW_IPV6:
1802                 op_mod = 2;
1803                 break;
1804         case IB_QPT_RAW_ETY:
1805                 op_mod = 3;
1806                 break;
1807         default:
1808                 return -EINVAL;
1809         }
1810
1811         return mthca_cmd(dev, 0, qpn, op_mod, CMD_CONF_SPECIAL_QP,
1812                          CMD_TIME_CLASS_B, status);
1813 }
1814
1815 int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
1816                   int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
1817                   void *in_mad, void *response_mad, u8 *status)
1818 {
1819         struct mthca_mailbox *inmailbox, *outmailbox;
1820         void *inbox;
1821         int err;
1822         u32 in_modifier = port;
1823         u8 op_modifier = 0;
1824
1825 #define MAD_IFC_BOX_SIZE      0x400
1826 #define MAD_IFC_MY_QPN_OFFSET 0x100
1827 #define MAD_IFC_RQPN_OFFSET   0x108
1828 #define MAD_IFC_SL_OFFSET     0x10c
1829 #define MAD_IFC_G_PATH_OFFSET 0x10d
1830 #define MAD_IFC_RLID_OFFSET   0x10e
1831 #define MAD_IFC_PKEY_OFFSET   0x112
1832 #define MAD_IFC_GRH_OFFSET    0x140
1833
1834         inmailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1835         if (IS_ERR(inmailbox))
1836                 return PTR_ERR(inmailbox);
1837         inbox = inmailbox->buf;
1838
1839         outmailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
1840         if (IS_ERR(outmailbox)) {
1841                 mthca_free_mailbox(dev, inmailbox);
1842                 return PTR_ERR(outmailbox);
1843         }
1844
1845         memcpy(inbox, in_mad, 256);
1846
1847         /*
1848          * Key check traps can't be generated unless we have in_wc to
1849          * tell us where to send the trap.
1850          */
1851         if (ignore_mkey || !in_wc)
1852                 op_modifier |= 0x1;
1853         if (ignore_bkey || !in_wc)
1854                 op_modifier |= 0x2;
1855
1856         if (in_wc) {
1857                 u8 val;
1858
1859                 memset(inbox + 256, 0, 256);
1860
1861                 MTHCA_PUT(inbox, in_wc->qp->qp_num, MAD_IFC_MY_QPN_OFFSET);
1862                 MTHCA_PUT(inbox, in_wc->src_qp,     MAD_IFC_RQPN_OFFSET);
1863
1864                 val = in_wc->sl << 4;
1865                 MTHCA_PUT(inbox, val,               MAD_IFC_SL_OFFSET);
1866
1867                 val = in_wc->dlid_path_bits |
1868                         (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
1869                 MTHCA_PUT(inbox, val,               MAD_IFC_G_PATH_OFFSET);
1870
1871                 MTHCA_PUT(inbox, in_wc->slid,       MAD_IFC_RLID_OFFSET);
1872                 MTHCA_PUT(inbox, in_wc->pkey_index, MAD_IFC_PKEY_OFFSET);
1873
1874                 if (in_grh)
1875                         memcpy(inbox + MAD_IFC_GRH_OFFSET, in_grh, 40);
1876
1877                 op_modifier |= 0x4;
1878
1879                 in_modifier |= in_wc->slid << 16;
1880         }
1881
1882         err = mthca_cmd_box(dev, inmailbox->dma, outmailbox->dma,
1883                             in_modifier, op_modifier,
1884                             CMD_MAD_IFC, CMD_TIME_CLASS_C, status);
1885
1886         if (!err && !*status)
1887                 memcpy(response_mad, outmailbox->buf, 256);
1888
1889         mthca_free_mailbox(dev, inmailbox);
1890         mthca_free_mailbox(dev, outmailbox);
1891         return err;
1892 }
1893
1894 int mthca_READ_MGM(struct mthca_dev *dev, int index,
1895                    struct mthca_mailbox *mailbox, u8 *status)
1896 {
1897         return mthca_cmd_box(dev, 0, mailbox->dma, index, 0,
1898                              CMD_READ_MGM, CMD_TIME_CLASS_A, status);
1899 }
1900
1901 int mthca_WRITE_MGM(struct mthca_dev *dev, int index,
1902                     struct mthca_mailbox *mailbox, u8 *status)
1903 {
1904         return mthca_cmd(dev, mailbox->dma, index, 0, CMD_WRITE_MGM,
1905                          CMD_TIME_CLASS_A, status);
1906 }
1907
1908 int mthca_MGID_HASH(struct mthca_dev *dev, struct mthca_mailbox *mailbox,
1909                     u16 *hash, u8 *status)
1910 {
1911         u64 imm;
1912         int err;
1913
1914         err = mthca_cmd_imm(dev, mailbox->dma, &imm, 0, 0, CMD_MGID_HASH,
1915                             CMD_TIME_CLASS_A, status);
1916
1917         *hash = imm;
1918         return err;
1919 }
1920
1921 int mthca_NOP(struct mthca_dev *dev, u8 *status)
1922 {
1923         return mthca_cmd(dev, 0, 0x1f, 0, CMD_NOP, msecs_to_jiffies(100), status);
1924 }