drivers/net/mlx4/eq.c

   1 /*
   2  * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/init.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/mm.h>
  37 #include <linux/dma-mapping.h>
  38
  39 #include <linux/mlx4/cmd.h>
  40
  41 #include "mlx4.h"
  42 #include "fw.h"
  43
  44 enum {
  45         MLX4_NUM_ASYNC_EQE      = 0x100,
  46         MLX4_NUM_SPARE_EQE      = 0x80,
  47         MLX4_EQ_ENTRY_SIZE      = 0x20
  48 };
  49
  50 /*
  51  * Must be packed because start is 64 bits but only aligned to 32 bits.
  52  */
  53 struct mlx4_eq_context {
  54         __be32                  flags;
  55         u16                     reserved1[3];
  56         __be16                  page_offset;
  57         u8                      log_eq_size;
  58         u8                      reserved2[4];
  59         u8                      eq_period;
  60         u8                      reserved3;
  61         u8                      eq_max_count;
  62         u8                      reserved4[3];
  63         u8                      intr;
  64         u8                      log_page_size;
  65         u8                      reserved5[2];
  66         u8                      mtt_base_addr_h;
  67         __be32                  mtt_base_addr_l;
  68         u32                     reserved6[2];
  69         __be32                  consumer_index;
  70         __be32                  producer_index;
  71         u32                     reserved7[4];
  72 };
  73
  74 #define MLX4_EQ_STATUS_OK          ( 0 << 28)
  75 #define MLX4_EQ_STATUS_WRITE_FAIL  (10 << 28)
  76 #define MLX4_EQ_OWNER_SW           ( 0 << 24)
  77 #define MLX4_EQ_OWNER_HW           ( 1 << 24)
  78 #define MLX4_EQ_FLAG_EC            ( 1 << 18)
  79 #define MLX4_EQ_FLAG_OI            ( 1 << 17)
  80 #define MLX4_EQ_STATE_ARMED        ( 9 <<  8)
  81 #define MLX4_EQ_STATE_FIRED        (10 <<  8)
  82 #define MLX4_EQ_STATE_ALWAYS_ARMED (11 <<  8)
  83
  84 #define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG)           | \
  85                                (1ull << MLX4_EVENT_TYPE_COMM_EST)           | \
  86                                (1ull << MLX4_EVENT_TYPE_SQ_DRAINED)         | \
  87                                (1ull << MLX4_EVENT_TYPE_CQ_ERROR)           | \
  88                                (1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR)     | \
  89                                (1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR)    | \
  90                                (1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED)    | \
  91                                (1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
  92                                (1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR)    | \
  93                                (1ull << MLX4_EVENT_TYPE_PORT_CHANGE)        | \
  94                                (1ull << MLX4_EVENT_TYPE_ECC_DETECT)         | \
  95                                (1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)    | \
  96                                (1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE)    | \
  97                                (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT)          | \
  98                                (1ull << MLX4_EVENT_TYPE_CMD))
  99
 100 struct mlx4_eqe {
 101         u8                      reserved1;
 102         u8                      type;
 103         u8                      reserved2;
 104         u8                      subtype;
 105         union {
 106                 u32             raw[6];
 107                 struct {
 108                         __be32  cqn;
 109                 } __attribute__((packed)) comp;
 110                 struct {
 111                         u16     reserved1;
 112                         __be16  token;
 113                         u32     reserved2;
 114                         u8      reserved3[3];
 115                         u8      status;
 116                         __be64  out_param;
 117                 } __attribute__((packed)) cmd;
 118                 struct {
 119                         __be32  qpn;
 120                 } __attribute__((packed)) qp;
 121                 struct {
 122                         __be32  srqn;
 123                 } __attribute__((packed)) srq;
 124                 struct {
 125                         __be32  cqn;
 126                         u32     reserved1;
 127                         u8      reserved2[3];
 128                         u8      syndrome;
 129                 } __attribute__((packed)) cq_err;
 130                 struct {
 131                         u32     reserved1[2];
 132                         __be32  port;
 133                 } __attribute__((packed)) port_change;
 134         }                       event;
 135         u8                      reserved3[3];
 136         u8                      owner;
 137 } __attribute__((packed));
 138
 139 static void eq_set_ci(struct mlx4_eq *eq, int req_not)
 140 {
 141         __raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
 142                                                req_not << 31),
 143                      eq->doorbell);
 144         /* We still want ordering, just not swabbing, so add a barrier */
 145         mb();
 146 }
 147
 148 static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry)
 149 {
 150         unsigned long off = (entry & (eq->nent - 1)) * MLX4_EQ_ENTRY_SIZE;
 151         return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
 152 }
 153
 154 static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq)
 155 {
 156         struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index);
 157         return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
 158 }
 159
 160 static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
 161 {
 162         struct mlx4_eqe *eqe;
 163         int cqn;
 164         int eqes_found = 0;
 165         int set_ci = 0;
 166
 167         while ((eqe = next_eqe_sw(eq))) {
 168                 /*
 169                  * Make sure we read EQ entry contents after we've
 170                  * checked the ownership bit.
 171                  */
 172                 rmb();
 173
 174                 switch (eqe->type) {
 175                 case MLX4_EVENT_TYPE_COMP:
 176                         cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
 177                         mlx4_cq_completion(dev, cqn);
 178                         break;
 179
 180                 case MLX4_EVENT_TYPE_PATH_MIG:
 181                 case MLX4_EVENT_TYPE_COMM_EST:
 182                 case MLX4_EVENT_TYPE_SQ_DRAINED:
 183                 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
 184                 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
 185                 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
 186                 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 187                 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
 188                         mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
 189                                       eqe->type);
 190                         break;
 191
 192                 case MLX4_EVENT_TYPE_SRQ_LIMIT:
 193                 case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
 194                         mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
 195                                       eqe->type);
 196                         break;
 197
 198                 case MLX4_EVENT_TYPE_CMD:
 199                         mlx4_cmd_event(dev,
 200                                        be16_to_cpu(eqe->event.cmd.token),
 201                                        eqe->event.cmd.status,
 202                                        be64_to_cpu(eqe->event.cmd.out_param));
 203                         break;
 204
 205                 case MLX4_EVENT_TYPE_PORT_CHANGE:
 206                         mlx4_dispatch_event(dev,
 207                                             eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_ACTIVE ?
 208                                             MLX4_DEV_EVENT_PORT_UP :
 209                                             MLX4_DEV_EVENT_PORT_DOWN,
 210                                             be32_to_cpu(eqe->event.port_change.port) >> 28);
 211                         break;
 212
 213                 case MLX4_EVENT_TYPE_CQ_ERROR:
 214                         mlx4_warn(dev, "CQ %s on CQN %06x\n",
 215                                   eqe->event.cq_err.syndrome == 1 ?
 216                                   "overrun" : "access violation",
 217                                   be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
 218                         mlx4_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
 219                                       eqe->type);
 220                         break;
 221
 222                 case MLX4_EVENT_TYPE_EQ_OVERFLOW:
 223                         mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
 224                         break;
 225
 226                 case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
 227                 case MLX4_EVENT_TYPE_ECC_DETECT:
 228                 default:
 229                         mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at index %u\n",
 230                                   eqe->type, eqe->subtype, eq->eqn, eq->cons_index);
 231                         break;
 232                 };
 233
 234                 ++eq->cons_index;
 235                 eqes_found = 1;
 236                 ++set_ci;
 237
 238                 /*
 239                  * The HCA will think the queue has overflowed if we
 240                  * don't tell it we've been processing events.  We
 241                  * create our EQs with MLX4_NUM_SPARE_EQE extra
 242                  * entries, so we must update our consumer index at
 243                  * least that often.
 244                  */
 245                 if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
 246                         eq_set_ci(eq, 0);
 247                         set_ci = 0;
 248                 }
 249         }
 250
 251         eq_set_ci(eq, 1);
 252
 253         return eqes_found;
 254 }
 255
 256 static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
 257 {
 258         struct mlx4_dev *dev = dev_ptr;
 259         struct mlx4_priv *priv = mlx4_priv(dev);
 260         int work = 0;
 261         int i;
 262
 263         writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
 264
 265         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
 266                 work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
 267
 268         return IRQ_RETVAL(work);
 269 }
 270
 271 static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
 272 {
 273         struct mlx4_eq  *eq  = eq_ptr;
 274         struct mlx4_dev *dev = eq->dev;
 275
 276         mlx4_eq_int(dev, eq);
 277
 278         /* MSI-X vectors always belong to us */
 279         return IRQ_HANDLED;
 280 }
 281
 282 static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
 283                         int eq_num)
 284 {
 285         return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
 286                         0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B);
 287 }
 288
 289 static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 290                          int eq_num)
 291 {
 292         return mlx4_cmd(dev, mailbox->dma, eq_num, 0, MLX4_CMD_SW2HW_EQ,
 293                         MLX4_CMD_TIME_CLASS_A);
 294 }
 295
 296 static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 297                          int eq_num)
 298 {
 299         return mlx4_cmd_box(dev, 0, mailbox->dma, eq_num, 0, MLX4_CMD_HW2SW_EQ,
 300                             MLX4_CMD_TIME_CLASS_A);
 301 }
 302
 303 static int mlx4_num_eq_uar(struct mlx4_dev *dev)
 304 {
 305         /*
 306          * Each UAR holds 4 EQ doorbells.  To figure out how many UARs
 307          * we need to map, take the difference of highest index and
 308          * the lowest index we'll use and add 1.
 309          */
 310         return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs) / 4 -
 311                 dev->caps.reserved_eqs / 4 + 1;
 312 }
 313
 314 static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
 315 {
 316         struct mlx4_priv *priv = mlx4_priv(dev);
 317         int index;
 318
 319         index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
 320
 321         if (!priv->eq_table.uar_map[index]) {
 322                 priv->eq_table.uar_map[index] =
 323                         ioremap(pci_resource_start(dev->pdev, 2) +
 324                                 ((eq->eqn / 4) << PAGE_SHIFT),
 325                                 PAGE_SIZE);
 326                 if (!priv->eq_table.uar_map[index]) {
 327                         mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
 328                                  eq->eqn);
 329                         return NULL;
 330                 }
 331         }
 332
 333         return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
 334 }
 335
 336 static int mlx4_create_eq(struct mlx4_dev *dev, int nent,
 337                           u8 intr, struct mlx4_eq *eq)
 338 {
 339         struct mlx4_priv *priv = mlx4_priv(dev);
 340         struct mlx4_cmd_mailbox *mailbox;
 341         struct mlx4_eq_context *eq_context;
 342         int npages;
 343         u64 *dma_list = NULL;
 344         dma_addr_t t;
 345         u64 mtt_addr;
 346         int err = -ENOMEM;
 347         int i;
 348
 349         eq->dev   = dev;
 350         eq->nent  = roundup_pow_of_two(max(nent, 2));
 351         npages = PAGE_ALIGN(eq->nent * MLX4_EQ_ENTRY_SIZE) / PAGE_SIZE;
 352
 353         eq->page_list = kmalloc(npages * sizeof *eq->page_list,
 354                                 GFP_KERNEL);
 355         if (!eq->page_list)
 356                 goto err_out;
 357
 358         for (i = 0; i < npages; ++i)
 359                 eq->page_list[i].buf = NULL;
 360
 361         dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
 362         if (!dma_list)
 363                 goto err_out_free;
 364
 365         mailbox = mlx4_alloc_cmd_mailbox(dev);
 366         if (IS_ERR(mailbox))
 367                 goto err_out_free;
 368         eq_context = mailbox->buf;
 369
 370         for (i = 0; i < npages; ++i) {
 371                 eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
 372                                                           PAGE_SIZE, &t, GFP_KERNEL);
 373                 if (!eq->page_list[i].buf)
 374                         goto err_out_free_pages;
 375
 376                 dma_list[i] = t;
 377                 eq->page_list[i].map = t;
 378
 379                 memset(eq->page_list[i].buf, 0, PAGE_SIZE);
 380         }
 381
 382         eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
 383         if (eq->eqn == -1)
 384                 goto err_out_free_pages;
 385
 386         eq->doorbell = mlx4_get_eq_uar(dev, eq);
 387         if (!eq->doorbell) {
 388                 err = -ENOMEM;
 389                 goto err_out_free_eq;
 390         }
 391
 392         err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
 393         if (err)
 394                 goto err_out_free_eq;
 395
 396         err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
 397         if (err)
 398                 goto err_out_free_mtt;
 399
 400         memset(eq_context, 0, sizeof *eq_context);
 401         eq_context->flags         = cpu_to_be32(MLX4_EQ_STATUS_OK   |
 402                                                 MLX4_EQ_STATE_ARMED);
 403         eq_context->log_eq_size   = ilog2(eq->nent);
 404         eq_context->intr          = intr;
 405         eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
 406
 407         mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
 408         eq_context->mtt_base_addr_h = mtt_addr >> 32;
 409         eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
 410
 411         err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
 412         if (err) {
 413                 mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
 414                 goto err_out_free_mtt;
 415         }
 416
 417         kfree(dma_list);
 418         mlx4_free_cmd_mailbox(dev, mailbox);
 419
 420         eq->cons_index = 0;
 421
 422         return err;
 423
 424 err_out_free_mtt:
 425         mlx4_mtt_cleanup(dev, &eq->mtt);
 426
 427 err_out_free_eq:
 428         mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
 429
 430 err_out_free_pages:
 431         for (i = 0; i < npages; ++i)
 432                 if (eq->page_list[i].buf)
 433                         dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
 434                                           eq->page_list[i].buf,
 435                                           eq->page_list[i].map);
 436
 437         mlx4_free_cmd_mailbox(dev, mailbox);
 438
 439 err_out_free:
 440         kfree(eq->page_list);
 441         kfree(dma_list);
 442
 443 err_out:
 444         return err;
 445 }
 446
 447 static void mlx4_free_eq(struct mlx4_dev *dev,
 448                          struct mlx4_eq *eq)
 449 {
 450         struct mlx4_priv *priv = mlx4_priv(dev);
 451         struct mlx4_cmd_mailbox *mailbox;
 452         int err;
 453         int npages = PAGE_ALIGN(MLX4_EQ_ENTRY_SIZE * eq->nent) / PAGE_SIZE;
 454         int i;
 455
 456         mailbox = mlx4_alloc_cmd_mailbox(dev);
 457         if (IS_ERR(mailbox))
 458                 return;
 459
 460         err = mlx4_HW2SW_EQ(dev, mailbox, eq->eqn);
 461         if (err)
 462                 mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
 463
 464         if (0) {
 465                 mlx4_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
 466                 for (i = 0; i < sizeof (struct mlx4_eq_context) / 4; ++i) {
 467                         if (i % 4 == 0)
 468                                 printk("[%02x] ", i * 4);
 469                         printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
 470                         if ((i + 1) % 4 == 0)
 471                                 printk("\n");
 472                 }
 473         }
 474
 475         mlx4_mtt_cleanup(dev, &eq->mtt);
 476         for (i = 0; i < npages; ++i)
 477                 pci_free_consistent(dev->pdev, PAGE_SIZE,
 478                                     eq->page_list[i].buf,
 479                                     eq->page_list[i].map);
 480
 481         kfree(eq->page_list);
 482         mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
 483         mlx4_free_cmd_mailbox(dev, mailbox);
 484 }
 485
 486 static void mlx4_free_irqs(struct mlx4_dev *dev)
 487 {
 488         struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
 489         int i;
 490
 491         if (eq_table->have_irq)
 492                 free_irq(dev->pdev->irq, dev);
 493         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
 494                 if (eq_table->eq[i].have_irq)
 495                         free_irq(eq_table->eq[i].irq, eq_table->eq + i);
 496
 497         kfree(eq_table->irq_names);
 498 }
 499
 500 static int mlx4_map_clr_int(struct mlx4_dev *dev)
 501 {
 502         struct mlx4_priv *priv = mlx4_priv(dev);
 503
 504         priv->clr_base = ioremap(pci_resource_start(dev->pdev, priv->fw.clr_int_bar) +
 505                                  priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
 506         if (!priv->clr_base) {
 507                 mlx4_err(dev, "Couldn't map interrupt clear register, aborting.\n");
 508                 return -ENOMEM;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
 515 {
 516         struct mlx4_priv *priv = mlx4_priv(dev);
 517
 518         iounmap(priv->clr_base);
 519 }
 520
 521 int mlx4_map_eq_icm(struct mlx4_dev *dev, u64 icm_virt)
 522 {
 523         struct mlx4_priv *priv = mlx4_priv(dev);
 524         int ret;
 525
 526         /*
 527          * We assume that mapping one page is enough for the whole EQ
 528          * context table.  This is fine with all current HCAs, because
 529          * we only use 32 EQs and each EQ uses 64 bytes of context
 530          * memory, or 1 KB total.
 531          */
 532         priv->eq_table.icm_virt = icm_virt;
 533         priv->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
 534         if (!priv->eq_table.icm_page)
 535                 return -ENOMEM;
 536         priv->eq_table.icm_dma  = pci_map_page(dev->pdev, priv->eq_table.icm_page, 0,
 537                                                PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 538         if (pci_dma_mapping_error(dev->pdev, priv->eq_table.icm_dma)) {
 539                 __free_page(priv->eq_table.icm_page);
 540                 return -ENOMEM;
 541         }
 542
 543         ret = mlx4_MAP_ICM_page(dev, priv->eq_table.icm_dma, icm_virt);
 544         if (ret) {
 545                 pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE,
 546                                PCI_DMA_BIDIRECTIONAL);
 547                 __free_page(priv->eq_table.icm_page);
 548         }
 549
 550         return ret;
 551 }
 552
 553 void mlx4_unmap_eq_icm(struct mlx4_dev *dev)
 554 {
 555         struct mlx4_priv *priv = mlx4_priv(dev);
 556
 557         mlx4_UNMAP_ICM(dev, priv->eq_table.icm_virt, 1);
 558         pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE,
 559                        PCI_DMA_BIDIRECTIONAL);
 560         __free_page(priv->eq_table.icm_page);
 561 }
 562
 563 int mlx4_alloc_eq_table(struct mlx4_dev *dev)
 564 {
 565         struct mlx4_priv *priv = mlx4_priv(dev);
 566
 567         priv->eq_table.eq = kcalloc(dev->caps.num_eqs - dev->caps.reserved_eqs,
 568                                     sizeof *priv->eq_table.eq, GFP_KERNEL);
 569         if (!priv->eq_table.eq)
 570                 return -ENOMEM;
 571
 572         return 0;
 573 }
 574
 575 void mlx4_free_eq_table(struct mlx4_dev *dev)
 576 {
 577         kfree(mlx4_priv(dev)->eq_table.eq);
 578 }
 579
 580 int mlx4_init_eq_table(struct mlx4_dev *dev)
 581 {
 582         struct mlx4_priv *priv = mlx4_priv(dev);
 583         int err;
 584         int i;
 585
 586         priv->eq_table.uar_map = kcalloc(sizeof *priv->eq_table.uar_map,
 587                                          mlx4_num_eq_uar(dev), GFP_KERNEL);
 588         if (!priv->eq_table.uar_map) {
 589                 err = -ENOMEM;
 590                 goto err_out_free;
 591         }
 592
 593         err = mlx4_bitmap_init(&priv->eq_table.bitmap, dev->caps.num_eqs,
 594                                dev->caps.num_eqs - 1, dev->caps.reserved_eqs, 0);
 595         if (err)
 596                 goto err_out_free;
 597
 598         for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
 599                 priv->eq_table.uar_map[i] = NULL;
 600
 601         err = mlx4_map_clr_int(dev);
 602         if (err)
 603                 goto err_out_bitmap;
 604
 605         priv->eq_table.clr_mask =
 606                 swab32(1 << (priv->eq_table.inta_pin & 31));
 607         priv->eq_table.clr_int  = priv->clr_base +
 608                 (priv->eq_table.inta_pin < 32 ? 4 : 0);
 609
 610         priv->eq_table.irq_names = kmalloc(16 * dev->caps.num_comp_vectors, GFP_KERNEL);
 611         if (!priv->eq_table.irq_names) {
 612                 err = -ENOMEM;
 613                 goto err_out_bitmap;
 614         }
 615
 616         for (i = 0; i < dev->caps.num_comp_vectors; ++i) {
 617                 err = mlx4_create_eq(dev, dev->caps.num_cqs + MLX4_NUM_SPARE_EQE,
 618                                      (dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
 619                                      &priv->eq_table.eq[i]);
 620                 if (err)
 621                         goto err_out_unmap;
 622         }
 623
 624         err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
 625                              (dev->flags & MLX4_FLAG_MSI_X) ? dev->caps.num_comp_vectors : 0,
 626                              &priv->eq_table.eq[dev->caps.num_comp_vectors]);
 627         if (err)
 628                 goto err_out_comp;
 629
 630         if (dev->flags & MLX4_FLAG_MSI_X) {
 631                 static const char async_eq_name[] = "mlx4-async";
 632                 const char *eq_name;
 633
 634                 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
 635                         if (i < dev->caps.num_comp_vectors) {
 636                                 snprintf(priv->eq_table.irq_names + i * 16, 16,
 637                                          "mlx4-comp-%d", i);
 638                                 eq_name = priv->eq_table.irq_names + i * 16;
 639                         } else
 640                                 eq_name = async_eq_name;
 641
 642                         err = request_irq(priv->eq_table.eq[i].irq,
 643                                           mlx4_msi_x_interrupt, 0, eq_name,
 644                                           priv->eq_table.eq + i);
 645                         if (err)
 646                                 goto err_out_async;
 647
 648                         priv->eq_table.eq[i].have_irq = 1;
 649                 }
 650         } else {
 651                 err = request_irq(dev->pdev->irq, mlx4_interrupt,
 652                                   IRQF_SHARED, DRV_NAME, dev);
 653                 if (err)
 654                         goto err_out_async;
 655
 656                 priv->eq_table.have_irq = 1;
 657         }
 658
 659         err = mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 0,
 660                           priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
 661         if (err)
 662                 mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
 663                            priv->eq_table.eq[dev->caps.num_comp_vectors].eqn, err);
 664
 665         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
 666                 eq_set_ci(&priv->eq_table.eq[i], 1);
 667
 668         return 0;
 669
 670 err_out_async:
 671         mlx4_free_eq(dev, &priv->eq_table.eq[dev->caps.num_comp_vectors]);
 672
 673 err_out_comp:
 674         i = dev->caps.num_comp_vectors - 1;
 675
 676 err_out_unmap:
 677         while (i >= 0) {
 678                 mlx4_free_eq(dev, &priv->eq_table.eq[i]);
 679                 --i;
 680         }
 681         mlx4_unmap_clr_int(dev);
 682         mlx4_free_irqs(dev);
 683
 684 err_out_bitmap:
 685         mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
 686
 687 err_out_free:
 688         kfree(priv->eq_table.uar_map);
 689
 690         return err;
 691 }
 692
 693 void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
 694 {
 695         struct mlx4_priv *priv = mlx4_priv(dev);
 696         int i;
 697
 698         mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 1,
 699                     priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
 700
 701         mlx4_free_irqs(dev);
 702
 703         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
 704                 mlx4_free_eq(dev, &priv->eq_table.eq[i]);
 705
 706         mlx4_unmap_clr_int(dev);
 707
 708         for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
 709                 if (priv->eq_table.uar_map[i])
 710                         iounmap(priv->eq_table.uar_map[i]);
 711
 712         mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
 713
 714         kfree(priv->eq_table.uar_map);
 715 }