drivers/net/ethernet/mellanox/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/slab.h>
  37 #include <linux/export.h>
  38 #include <linux/mm.h>
  39 #include <linux/dma-mapping.h>
  40
  41 #include <linux/mlx4/cmd.h>
  42 #include <linux/cpu_rmap.h>
  43
  44 #include "mlx4.h"
  45 #include "fw.h"
  46
  47 enum {
  48         MLX4_IRQNAME_SIZE       = 32
  49 };
  50
  51 enum {
  52         MLX4_NUM_ASYNC_EQE      = 0x100,
  53         MLX4_NUM_SPARE_EQE      = 0x80,
  54         MLX4_EQ_ENTRY_SIZE      = 0x20
  55 };
  56
  57 #define MLX4_EQ_STATUS_OK          ( 0 << 28)
  58 #define MLX4_EQ_STATUS_WRITE_FAIL  (10 << 28)
  59 #define MLX4_EQ_OWNER_SW           ( 0 << 24)
  60 #define MLX4_EQ_OWNER_HW           ( 1 << 24)
  61 #define MLX4_EQ_FLAG_EC            ( 1 << 18)
  62 #define MLX4_EQ_FLAG_OI            ( 1 << 17)
  63 #define MLX4_EQ_STATE_ARMED        ( 9 <<  8)
  64 #define MLX4_EQ_STATE_FIRED        (10 <<  8)
  65 #define MLX4_EQ_STATE_ALWAYS_ARMED (11 <<  8)
  66
  67 #define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG)           | \
  68                                (1ull << MLX4_EVENT_TYPE_COMM_EST)           | \
  69                                (1ull << MLX4_EVENT_TYPE_SQ_DRAINED)         | \
  70                                (1ull << MLX4_EVENT_TYPE_CQ_ERROR)           | \
  71                                (1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR)     | \
  72                                (1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR)    | \
  73                                (1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED)    | \
  74                                (1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
  75                                (1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR)    | \
  76                                (1ull << MLX4_EVENT_TYPE_PORT_CHANGE)        | \
  77                                (1ull << MLX4_EVENT_TYPE_ECC_DETECT)         | \
  78                                (1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)    | \
  79                                (1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE)    | \
  80                                (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT)          | \
  81                                (1ull << MLX4_EVENT_TYPE_CMD)                | \
  82                                (1ull << MLX4_EVENT_TYPE_COMM_CHANNEL)       | \
  83                                (1ull << MLX4_EVENT_TYPE_FLR_EVENT)          | \
  84                                (1ull << MLX4_EVENT_TYPE_FATAL_WARNING))
  85
  86 static u64 get_async_ev_mask(struct mlx4_dev *dev)
  87 {
  88         u64 async_ev_mask = MLX4_ASYNC_EVENT_MASK;
  89         if (dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
  90                 async_ev_mask |= (1ull << MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT);
  91
  92         return async_ev_mask;
  93 }
  94
  95 static void eq_set_ci(struct mlx4_eq *eq, int req_not)
  96 {
  97         __raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
  98                                                req_not << 31),
  99                      eq->doorbell);
 100         /* We still want ordering, just not swabbing, so add a barrier */
 101         mb();
 102 }
 103
 104 static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry)
 105 {
 106         unsigned long off = (entry & (eq->nent - 1)) * MLX4_EQ_ENTRY_SIZE;
 107         return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
 108 }
 109
 110 static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq)
 111 {
 112         struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index);
 113         return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
 114 }
 115
 116 static struct mlx4_eqe *next_slave_event_eqe(struct mlx4_slave_event_eq *slave_eq)
 117 {
 118         struct mlx4_eqe *eqe =
 119                 &slave_eq->event_eqe[slave_eq->cons & (SLAVE_EVENT_EQ_SIZE - 1)];
 120         return (!!(eqe->owner & 0x80) ^
 121                 !!(slave_eq->cons & SLAVE_EVENT_EQ_SIZE)) ?
 122                 eqe : NULL;
 123 }
 124
 125 void mlx4_gen_slave_eqe(struct work_struct *work)
 126 {
 127         struct mlx4_mfunc_master_ctx *master =
 128                 container_of(work, struct mlx4_mfunc_master_ctx,
 129                              slave_event_work);
 130         struct mlx4_mfunc *mfunc =
 131                 container_of(master, struct mlx4_mfunc, master);
 132         struct mlx4_priv *priv = container_of(mfunc, struct mlx4_priv, mfunc);
 133         struct mlx4_dev *dev = &priv->dev;
 134         struct mlx4_slave_event_eq *slave_eq = &mfunc->master.slave_eq;
 135         struct mlx4_eqe *eqe;
 136         u8 slave;
 137         int i;
 138
 139         for (eqe = next_slave_event_eqe(slave_eq); eqe;
 140               eqe = next_slave_event_eqe(slave_eq)) {
 141                 slave = eqe->slave_id;
 142
 143                 /* All active slaves need to receive the event */
 144                 if (slave == ALL_SLAVES) {
 145                         for (i = 0; i < dev->num_slaves; i++) {
 146                                 if (i != dev->caps.function &&
 147                                     master->slave_state[i].active)
 148                                         if (mlx4_GEN_EQE(dev, i, eqe))
 149                                                 mlx4_warn(dev, "Failed to "
 150                                                           " generate event "
 151                                                           "for slave %d\n", i);
 152                         }
 153                 } else {
 154                         if (mlx4_GEN_EQE(dev, slave, eqe))
 155                                 mlx4_warn(dev, "Failed to generate event "
 156                                                "for slave %d\n", slave);
 157                 }
 158                 ++slave_eq->cons;
 159         }
 160 }
 161
 162
 163 static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe)
 164 {
 165         struct mlx4_priv *priv = mlx4_priv(dev);
 166         struct mlx4_slave_event_eq *slave_eq = &priv->mfunc.master.slave_eq;
 167         struct mlx4_eqe *s_eqe;
 168         unsigned long flags;
 169
 170         spin_lock_irqsave(&slave_eq->event_lock, flags);
 171         s_eqe = &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)];
 172         if ((!!(s_eqe->owner & 0x80)) ^
 173             (!!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE))) {
 174                 mlx4_warn(dev, "Master failed to generate an EQE for slave: %d. "
 175                           "No free EQE on slave events queue\n", slave);
 176                 spin_unlock_irqrestore(&slave_eq->event_lock, flags);
 177                 return;
 178         }
 179
 180         memcpy(s_eqe, eqe, sizeof(struct mlx4_eqe) - 1);
 181         s_eqe->slave_id = slave;
 182         /* ensure all information is written before setting the ownersip bit */
 183         wmb();
 184         s_eqe->owner = !!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE) ? 0x0 : 0x80;
 185         ++slave_eq->prod;
 186
 187         queue_work(priv->mfunc.master.comm_wq,
 188                    &priv->mfunc.master.slave_event_work);
 189         spin_unlock_irqrestore(&slave_eq->event_lock, flags);
 190 }
 191
 192 static void mlx4_slave_event(struct mlx4_dev *dev, int slave,
 193                              struct mlx4_eqe *eqe)
 194 {
 195         struct mlx4_priv *priv = mlx4_priv(dev);
 196         struct mlx4_slave_state *s_slave =
 197                 &priv->mfunc.master.slave_state[slave];
 198
 199         if (!s_slave->active) {
 200                 /*mlx4_warn(dev, "Trying to pass event to inactive slave\n");*/
 201                 return;
 202         }
 203
 204         slave_event(dev, slave, eqe);
 205 }
 206
 207 int mlx4_gen_pkey_eqe(struct mlx4_dev *dev, int slave, u8 port)
 208 {
 209         struct mlx4_eqe eqe;
 210
 211         struct mlx4_priv *priv = mlx4_priv(dev);
 212         struct mlx4_slave_state *s_slave = &priv->mfunc.master.slave_state[slave];
 213
 214         if (!s_slave->active)
 215                 return 0;
 216
 217         memset(&eqe, 0, sizeof eqe);
 218
 219         eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
 220         eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE;
 221         eqe.event.port_mgmt_change.port = port;
 222
 223         return mlx4_GEN_EQE(dev, slave, &eqe);
 224 }
 225 EXPORT_SYMBOL(mlx4_gen_pkey_eqe);
 226
 227 int mlx4_gen_guid_change_eqe(struct mlx4_dev *dev, int slave, u8 port)
 228 {
 229         struct mlx4_eqe eqe;
 230
 231         /*don't send if we don't have the that slave */
 232         if (dev->num_vfs < slave)
 233                 return 0;
 234         memset(&eqe, 0, sizeof eqe);
 235
 236         eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
 237         eqe.subtype = MLX4_DEV_PMC_SUBTYPE_GUID_INFO;
 238         eqe.event.port_mgmt_change.port = port;
 239
 240         return mlx4_GEN_EQE(dev, slave, &eqe);
 241 }
 242 EXPORT_SYMBOL(mlx4_gen_guid_change_eqe);
 243
 244 int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port,
 245                                    u8 port_subtype_change)
 246 {
 247         struct mlx4_eqe eqe;
 248
 249         /*don't send if we don't have the that slave */
 250         if (dev->num_vfs < slave)
 251                 return 0;
 252         memset(&eqe, 0, sizeof eqe);
 253
 254         eqe.type = MLX4_EVENT_TYPE_PORT_CHANGE;
 255         eqe.subtype = port_subtype_change;
 256         eqe.event.port_change.port = cpu_to_be32(port << 28);
 257
 258         mlx4_dbg(dev, "%s: sending: %d to slave: %d on port: %d\n", __func__,
 259                  port_subtype_change, slave, port);
 260         return mlx4_GEN_EQE(dev, slave, &eqe);
 261 }
 262 EXPORT_SYMBOL(mlx4_gen_port_state_change_eqe);
 263
 264 enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port)
 265 {
 266         struct mlx4_priv *priv = mlx4_priv(dev);
 267         struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
 268         if (slave >= dev->num_slaves || port > MLX4_MAX_PORTS) {
 269                 pr_err("%s: Error: asking for slave:%d, port:%d\n",
 270                        __func__, slave, port);
 271                 return SLAVE_PORT_DOWN;
 272         }
 273         return s_state[slave].port_state[port];
 274 }
 275 EXPORT_SYMBOL(mlx4_get_slave_port_state);
 276
 277 static int mlx4_set_slave_port_state(struct mlx4_dev *dev, int slave, u8 port,
 278                                      enum slave_port_state state)
 279 {
 280         struct mlx4_priv *priv = mlx4_priv(dev);
 281         struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
 282
 283         if (slave >= dev->num_slaves || port > MLX4_MAX_PORTS || port == 0) {
 284                 pr_err("%s: Error: asking for slave:%d, port:%d\n",
 285                        __func__, slave, port);
 286                 return -1;
 287         }
 288         s_state[slave].port_state[port] = state;
 289
 290         return 0;
 291 }
 292
 293 static void set_all_slave_state(struct mlx4_dev *dev, u8 port, int event)
 294 {
 295         int i;
 296         enum slave_port_gen_event gen_event;
 297
 298         for (i = 0; i < dev->num_slaves; i++)
 299                 set_and_calc_slave_port_state(dev, i, port, event, &gen_event);
 300 }
 301 /**************************************************************************
 302         The function get as input the new event to that port,
 303         and according to the prev state change the slave's port state.
 304         The events are:
 305                 MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
 306                 MLX4_PORT_STATE_DEV_EVENT_PORT_UP
 307                 MLX4_PORT_STATE_IB_EVENT_GID_VALID
 308                 MLX4_PORT_STATE_IB_EVENT_GID_INVALID
 309 ***************************************************************************/
 310 int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave,
 311                                   u8 port, int event,
 312                                   enum slave_port_gen_event *gen_event)
 313 {
 314         struct mlx4_priv *priv = mlx4_priv(dev);
 315         struct mlx4_slave_state *ctx = NULL;
 316         unsigned long flags;
 317         int ret = -1;
 318         enum slave_port_state cur_state =
 319                 mlx4_get_slave_port_state(dev, slave, port);
 320
 321         *gen_event = SLAVE_PORT_GEN_EVENT_NONE;
 322
 323         if (slave >= dev->num_slaves || port > MLX4_MAX_PORTS || port == 0) {
 324                 pr_err("%s: Error: asking for slave:%d, port:%d\n",
 325                        __func__, slave, port);
 326                 return ret;
 327         }
 328
 329         ctx = &priv->mfunc.master.slave_state[slave];
 330         spin_lock_irqsave(&ctx->lock, flags);
 331
 332         switch (cur_state) {
 333         case SLAVE_PORT_DOWN:
 334                 if (MLX4_PORT_STATE_DEV_EVENT_PORT_UP == event)
 335                         mlx4_set_slave_port_state(dev, slave, port,
 336                                                   SLAVE_PENDING_UP);
 337                 break;
 338         case SLAVE_PENDING_UP:
 339                 if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event)
 340                         mlx4_set_slave_port_state(dev, slave, port,
 341                                                   SLAVE_PORT_DOWN);
 342                 else if (MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID == event) {
 343                         mlx4_set_slave_port_state(dev, slave, port,
 344                                                   SLAVE_PORT_UP);
 345                         *gen_event = SLAVE_PORT_GEN_EVENT_UP;
 346                 }
 347                 break;
 348         case SLAVE_PORT_UP:
 349                 if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event) {
 350                         mlx4_set_slave_port_state(dev, slave, port,
 351                                                   SLAVE_PORT_DOWN);
 352                         *gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
 353                 } else if (MLX4_PORT_STATE_IB_EVENT_GID_INVALID ==
 354                                 event) {
 355                         mlx4_set_slave_port_state(dev, slave, port,
 356                                                   SLAVE_PENDING_UP);
 357                         *gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
 358                 }
 359                 break;
 360         default:
 361                 pr_err("%s: BUG!!! UNKNOWN state: "
 362                        "slave:%d, port:%d\n", __func__, slave, port);
 363                         goto out;
 364         }
 365         ret = mlx4_get_slave_port_state(dev, slave, port);
 366
 367 out:
 368         spin_unlock_irqrestore(&ctx->lock, flags);
 369         return ret;
 370 }
 371
 372 EXPORT_SYMBOL(set_and_calc_slave_port_state);
 373
 374 int mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev *dev, u8 port, int attr)
 375 {
 376         struct mlx4_eqe eqe;
 377
 378         memset(&eqe, 0, sizeof eqe);
 379
 380         eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
 381         eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PORT_INFO;
 382         eqe.event.port_mgmt_change.port = port;
 383         eqe.event.port_mgmt_change.params.port_info.changed_attr =
 384                 cpu_to_be32((u32) attr);
 385
 386         slave_event(dev, ALL_SLAVES, &eqe);
 387         return 0;
 388 }
 389 EXPORT_SYMBOL(mlx4_gen_slaves_port_mgt_ev);
 390
 391 void mlx4_master_handle_slave_flr(struct work_struct *work)
 392 {
 393         struct mlx4_mfunc_master_ctx *master =
 394                 container_of(work, struct mlx4_mfunc_master_ctx,
 395                              slave_flr_event_work);
 396         struct mlx4_mfunc *mfunc =
 397                 container_of(master, struct mlx4_mfunc, master);
 398         struct mlx4_priv *priv =
 399                 container_of(mfunc, struct mlx4_priv, mfunc);
 400         struct mlx4_dev *dev = &priv->dev;
 401         struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
 402         int i;
 403         int err;
 404
 405         mlx4_dbg(dev, "mlx4_handle_slave_flr\n");
 406
 407         for (i = 0 ; i < dev->num_slaves; i++) {
 408
 409                 if (MLX4_COMM_CMD_FLR == slave_state[i].last_cmd) {
 410                         mlx4_dbg(dev, "mlx4_handle_slave_flr: "
 411                                  "clean slave: %d\n", i);
 412
 413                         mlx4_delete_all_resources_for_slave(dev, i);
 414                         /*return the slave to running mode*/
 415                         spin_lock(&priv->mfunc.master.slave_state_lock);
 416                         slave_state[i].last_cmd = MLX4_COMM_CMD_RESET;
 417                         slave_state[i].is_slave_going_down = 0;
 418                         spin_unlock(&priv->mfunc.master.slave_state_lock);
 419                         /*notify the FW:*/
 420                         err = mlx4_cmd(dev, 0, i, 0, MLX4_CMD_INFORM_FLR_DONE,
 421                                        MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
 422                         if (err)
 423                                 mlx4_warn(dev, "Failed to notify FW on "
 424                                           "FLR done (slave:%d)\n", i);
 425                 }
 426         }
 427 }
 428
 429 static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
 430 {
 431         struct mlx4_priv *priv = mlx4_priv(dev);
 432         struct mlx4_eqe *eqe;
 433         int cqn;
 434         int eqes_found = 0;
 435         int set_ci = 0;
 436         int port;
 437         int slave = 0;
 438         int ret;
 439         u32 flr_slave;
 440         u8 update_slave_state;
 441         int i;
 442         enum slave_port_gen_event gen_event;
 443
 444         while ((eqe = next_eqe_sw(eq))) {
 445                 /*
 446                  * Make sure we read EQ entry contents after we've
 447                  * checked the ownership bit.
 448                  */
 449                 rmb();
 450
 451                 switch (eqe->type) {
 452                 case MLX4_EVENT_TYPE_COMP:
 453                         cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
 454                         mlx4_cq_completion(dev, cqn);
 455                         break;
 456
 457                 case MLX4_EVENT_TYPE_PATH_MIG:
 458                 case MLX4_EVENT_TYPE_COMM_EST:
 459                 case MLX4_EVENT_TYPE_SQ_DRAINED:
 460                 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
 461                 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
 462                 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
 463                 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 464                 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
 465                         mlx4_dbg(dev, "event %d arrived\n", eqe->type);
 466                         if (mlx4_is_master(dev)) {
 467                                 /* forward only to slave owning the QP */
 468                                 ret = mlx4_get_slave_from_resource_id(dev,
 469                                                 RES_QP,
 470                                                 be32_to_cpu(eqe->event.qp.qpn)
 471                                                 & 0xffffff, &slave);
 472                                 if (ret && ret != -ENOENT) {
 473                                         mlx4_dbg(dev, "QP event %02x(%02x) on "
 474                                                  "EQ %d at index %u: could "
 475                                                  "not get slave id (%d)\n",
 476                                                  eqe->type, eqe->subtype,
 477                                                  eq->eqn, eq->cons_index, ret);
 478                                         break;
 479                                 }
 480
 481                                 if (!ret && slave != dev->caps.function) {
 482                                         mlx4_slave_event(dev, slave, eqe);
 483                                         break;
 484                                 }
 485
 486                         }
 487                         mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) &
 488                                       0xffffff, eqe->type);
 489                         break;
 490
 491                 case MLX4_EVENT_TYPE_SRQ_LIMIT:
 492                         mlx4_warn(dev, "%s: MLX4_EVENT_TYPE_SRQ_LIMIT\n",
 493                                   __func__);
 494                 case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
 495                         if (mlx4_is_master(dev)) {
 496                                 /* forward only to slave owning the SRQ */
 497                                 ret = mlx4_get_slave_from_resource_id(dev,
 498                                                 RES_SRQ,
 499                                                 be32_to_cpu(eqe->event.srq.srqn)
 500                                                 & 0xffffff,
 501                                                 &slave);
 502                                 if (ret && ret != -ENOENT) {
 503                                         mlx4_warn(dev, "SRQ event %02x(%02x) "
 504                                                   "on EQ %d at index %u: could"
 505                                                   " not get slave id (%d)\n",
 506                                                   eqe->type, eqe->subtype,
 507                                                   eq->eqn, eq->cons_index, ret);
 508                                         break;
 509                                 }
 510                                 mlx4_warn(dev, "%s: slave:%d, srq_no:0x%x,"
 511                                           " event: %02x(%02x)\n", __func__,
 512                                           slave,
 513                                           be32_to_cpu(eqe->event.srq.srqn),
 514                                           eqe->type, eqe->subtype);
 515
 516                                 if (!ret && slave != dev->caps.function) {
 517                                         mlx4_warn(dev, "%s: sending event "
 518                                                   "%02x(%02x) to slave:%d\n",
 519                                                    __func__, eqe->type,
 520                                                   eqe->subtype, slave);
 521                                         mlx4_slave_event(dev, slave, eqe);
 522                                         break;
 523                                 }
 524                         }
 525                         mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) &
 526                                        0xffffff, eqe->type);
 527                         break;
 528
 529                 case MLX4_EVENT_TYPE_CMD:
 530                         mlx4_cmd_event(dev,
 531                                        be16_to_cpu(eqe->event.cmd.token),
 532                                        eqe->event.cmd.status,
 533                                        be64_to_cpu(eqe->event.cmd.out_param));
 534                         break;
 535
 536                 case MLX4_EVENT_TYPE_PORT_CHANGE:
 537                         port = be32_to_cpu(eqe->event.port_change.port) >> 28;
 538                         if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) {
 539                                 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN,
 540                                                     port);
 541                                 mlx4_priv(dev)->sense.do_sense_port[port] = 1;
 542                                 if (!mlx4_is_master(dev))
 543                                         break;
 544                                 for (i = 0; i < dev->num_slaves; i++) {
 545                                         if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) {
 546                                                 if (i == mlx4_master_func_num(dev))
 547                                                         continue;
 548                                                 mlx4_dbg(dev, "%s: Sending MLX4_PORT_CHANGE_SUBTYPE_DOWN"
 549                                                          " to slave: %d, port:%d\n",
 550                                                          __func__, i, port);
 551                                                 mlx4_slave_event(dev, i, eqe);
 552                                         } else {  /* IB port */
 553                                                 set_and_calc_slave_port_state(dev, i, port,
 554                                                                               MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
 555                                                                               &gen_event);
 556                                                 /*we can be in pending state, then do not send port_down event*/
 557                                                 if (SLAVE_PORT_GEN_EVENT_DOWN ==  gen_event) {
 558                                                         if (i == mlx4_master_func_num(dev))
 559                                                                 continue;
 560                                                         mlx4_slave_event(dev, i, eqe);
 561                                                 }
 562                                         }
 563                                 }
 564                         } else {
 565                                 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP, port);
 566
 567                                 mlx4_priv(dev)->sense.do_sense_port[port] = 0;
 568
 569                                 if (!mlx4_is_master(dev))
 570                                         break;
 571                                 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
 572                                         for (i = 0; i < dev->num_slaves; i++) {
 573                                                 if (i == mlx4_master_func_num(dev))
 574                                                         continue;
 575                                                 mlx4_slave_event(dev, i, eqe);
 576                                         }
 577                                 else /* IB port */
 578                                         /* port-up event will be sent to a slave when the
 579                                          * slave's alias-guid is set. This is done in alias_GUID.c
 580                                          */
 581                                         set_all_slave_state(dev, port, MLX4_DEV_EVENT_PORT_UP);
 582                         }
 583                         break;
 584
 585                 case MLX4_EVENT_TYPE_CQ_ERROR:
 586                         mlx4_warn(dev, "CQ %s on CQN %06x\n",
 587                                   eqe->event.cq_err.syndrome == 1 ?
 588                                   "overrun" : "access violation",
 589                                   be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
 590                         if (mlx4_is_master(dev)) {
 591                                 ret = mlx4_get_slave_from_resource_id(dev,
 592                                         RES_CQ,
 593                                         be32_to_cpu(eqe->event.cq_err.cqn)
 594                                         & 0xffffff, &slave);
 595                                 if (ret && ret != -ENOENT) {
 596                                         mlx4_dbg(dev, "CQ event %02x(%02x) on "
 597                                                  "EQ %d at index %u: could "
 598                                                   "not get slave id (%d)\n",
 599                                                   eqe->type, eqe->subtype,
 600                                                   eq->eqn, eq->cons_index, ret);
 601                                         break;
 602                                 }
 603
 604                                 if (!ret && slave != dev->caps.function) {
 605                                         mlx4_slave_event(dev, slave, eqe);
 606                                         break;
 607                                 }
 608                         }
 609                         mlx4_cq_event(dev,
 610                                       be32_to_cpu(eqe->event.cq_err.cqn)
 611                                       & 0xffffff,
 612                                       eqe->type);
 613                         break;
 614
 615                 case MLX4_EVENT_TYPE_EQ_OVERFLOW:
 616                         mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
 617                         break;
 618
 619                 case MLX4_EVENT_TYPE_COMM_CHANNEL:
 620                         if (!mlx4_is_master(dev)) {
 621                                 mlx4_warn(dev, "Received comm channel event "
 622                                                "for non master device\n");
 623                                 break;
 624                         }
 625                         memcpy(&priv->mfunc.master.comm_arm_bit_vector,
 626                                eqe->event.comm_channel_arm.bit_vec,
 627                                sizeof eqe->event.comm_channel_arm.bit_vec);
 628                         queue_work(priv->mfunc.master.comm_wq,
 629                                    &priv->mfunc.master.comm_work);
 630                         break;
 631
 632                 case MLX4_EVENT_TYPE_FLR_EVENT:
 633                         flr_slave = be32_to_cpu(eqe->event.flr_event.slave_id);
 634                         if (!mlx4_is_master(dev)) {
 635                                 mlx4_warn(dev, "Non-master function received"
 636                                                "FLR event\n");
 637                                 break;
 638                         }
 639
 640                         mlx4_dbg(dev, "FLR event for slave: %d\n", flr_slave);
 641
 642                         if (flr_slave >= dev->num_slaves) {
 643                                 mlx4_warn(dev,
 644                                           "Got FLR for unknown function: %d\n",
 645                                           flr_slave);
 646                                 update_slave_state = 0;
 647                         } else
 648                                 update_slave_state = 1;
 649
 650                         spin_lock(&priv->mfunc.master.slave_state_lock);
 651                         if (update_slave_state) {
 652                                 priv->mfunc.master.slave_state[flr_slave].active = false;
 653                                 priv->mfunc.master.slave_state[flr_slave].last_cmd = MLX4_COMM_CMD_FLR;
 654                                 priv->mfunc.master.slave_state[flr_slave].is_slave_going_down = 1;
 655                         }
 656                         spin_unlock(&priv->mfunc.master.slave_state_lock);
 657                         queue_work(priv->mfunc.master.comm_wq,
 658                                    &priv->mfunc.master.slave_flr_event_work);
 659                         break;
 660
 661                 case MLX4_EVENT_TYPE_FATAL_WARNING:
 662                         if (eqe->subtype == MLX4_FATAL_WARNING_SUBTYPE_WARMING) {
 663                                 if (mlx4_is_master(dev))
 664                                         for (i = 0; i < dev->num_slaves; i++) {
 665                                                 mlx4_dbg(dev, "%s: Sending "
 666                                                         "MLX4_FATAL_WARNING_SUBTYPE_WARMING"
 667                                                         " to slave: %d\n", __func__, i);
 668                                                 if (i == dev->caps.function)
 669                                                         continue;
 670                                                 mlx4_slave_event(dev, i, eqe);
 671                                         }
 672                                 mlx4_err(dev, "Temperature Threshold was reached! "
 673                                         "Threshold: %d celsius degrees; "
 674                                         "Current Temperature: %d\n",
 675                                         be16_to_cpu(eqe->event.warming.warning_threshold),
 676                                         be16_to_cpu(eqe->event.warming.current_temperature));
 677                         } else
 678                                 mlx4_warn(dev, "Unhandled event FATAL WARNING (%02x), "
 679                                           "subtype %02x on EQ %d at index %u. owner=%x, "
 680                                           "nent=0x%x, slave=%x, ownership=%s\n",
 681                                           eqe->type, eqe->subtype, eq->eqn,
 682                                           eq->cons_index, eqe->owner, eq->nent,
 683                                           eqe->slave_id,
 684                                           !!(eqe->owner & 0x80) ^
 685                                           !!(eq->cons_index & eq->nent) ? "HW" : "SW");
 686
 687                         break;
 688
 689                 case MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT:
 690                         mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE,
 691                                             (unsigned long) eqe);
 692                         break;
 693
 694                 case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
 695                 case MLX4_EVENT_TYPE_ECC_DETECT:
 696                 default:
 697                         mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at "
 698                                   "index %u. owner=%x, nent=0x%x, slave=%x, "
 699                                   "ownership=%s\n",
 700                                   eqe->type, eqe->subtype, eq->eqn,
 701                                   eq->cons_index, eqe->owner, eq->nent,
 702                                   eqe->slave_id,
 703                                   !!(eqe->owner & 0x80) ^
 704                                   !!(eq->cons_index & eq->nent) ? "HW" : "SW");
 705                         break;
 706                 };
 707
 708                 ++eq->cons_index;
 709                 eqes_found = 1;
 710                 ++set_ci;
 711
 712                 /*
 713                  * The HCA will think the queue has overflowed if we
 714                  * don't tell it we've been processing events.  We
 715                  * create our EQs with MLX4_NUM_SPARE_EQE extra
 716                  * entries, so we must update our consumer index at
 717                  * least that often.
 718                  */
 719                 if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
 720                         eq_set_ci(eq, 0);
 721                         set_ci = 0;
 722                 }
 723         }
 724
 725         eq_set_ci(eq, 1);
 726
 727         return eqes_found;
 728 }
 729
 730 static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
 731 {
 732         struct mlx4_dev *dev = dev_ptr;
 733         struct mlx4_priv *priv = mlx4_priv(dev);
 734         int work = 0;
 735         int i;
 736
 737         writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
 738
 739         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
 740                 work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
 741
 742         return IRQ_RETVAL(work);
 743 }
 744
 745 static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
 746 {
 747         struct mlx4_eq  *eq  = eq_ptr;
 748         struct mlx4_dev *dev = eq->dev;
 749
 750         mlx4_eq_int(dev, eq);
 751
 752         /* MSI-X vectors always belong to us */
 753         return IRQ_HANDLED;
 754 }
 755
 756 int mlx4_MAP_EQ_wrapper(struct mlx4_dev *dev, int slave,
 757                         struct mlx4_vhcr *vhcr,
 758                         struct mlx4_cmd_mailbox *inbox,
 759                         struct mlx4_cmd_mailbox *outbox,
 760                         struct mlx4_cmd_info *cmd)
 761 {
 762         struct mlx4_priv *priv = mlx4_priv(dev);
 763         struct mlx4_slave_event_eq_info *event_eq =
 764                 priv->mfunc.master.slave_state[slave].event_eq;
 765         u32 in_modifier = vhcr->in_modifier;
 766         u32 eqn = in_modifier & 0x1FF;
 767         u64 in_param =  vhcr->in_param;
 768         int err = 0;
 769         int i;
 770
 771         if (slave == dev->caps.function)
 772                 err = mlx4_cmd(dev, in_param, (in_modifier & 0x80000000) | eqn,
 773                                0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
 774                                MLX4_CMD_NATIVE);
 775         if (!err)
 776                 for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i)
 777                         if (in_param & (1LL << i))
 778                                 event_eq[i].eqn = in_modifier >> 31 ? -1 : eqn;
 779
 780         return err;
 781 }
 782
 783 static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
 784                         int eq_num)
 785 {
 786         return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
 787                         0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
 788                         MLX4_CMD_WRAPPED);
 789 }
 790
 791 static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 792                          int eq_num)
 793 {
 794         return mlx4_cmd(dev, mailbox->dma, eq_num, 0,
 795                         MLX4_CMD_SW2HW_EQ, MLX4_CMD_TIME_CLASS_A,
 796                         MLX4_CMD_WRAPPED);
 797 }
 798
 799 static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 800                          int eq_num)
 801 {
 802         return mlx4_cmd_box(dev, 0, mailbox->dma, eq_num,
 803                             0, MLX4_CMD_HW2SW_EQ, MLX4_CMD_TIME_CLASS_A,
 804                             MLX4_CMD_WRAPPED);
 805 }
 806
 807 static int mlx4_num_eq_uar(struct mlx4_dev *dev)
 808 {
 809         /*
 810          * Each UAR holds 4 EQ doorbells.  To figure out how many UARs
 811          * we need to map, take the difference of highest index and
 812          * the lowest index we'll use and add 1.
 813          */
 814         return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs +
 815                  dev->caps.comp_pool)/4 - dev->caps.reserved_eqs/4 + 1;
 816 }
 817
 818 static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
 819 {
 820         struct mlx4_priv *priv = mlx4_priv(dev);
 821         int index;
 822
 823         index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
 824
 825         if (!priv->eq_table.uar_map[index]) {
 826                 priv->eq_table.uar_map[index] =
 827                         ioremap(pci_resource_start(dev->pdev, 2) +
 828                                 ((eq->eqn / 4) << PAGE_SHIFT),
 829                                 PAGE_SIZE);
 830                 if (!priv->eq_table.uar_map[index]) {
 831                         mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
 832                                  eq->eqn);
 833                         return NULL;
 834                 }
 835         }
 836
 837         return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
 838 }
 839
 840 static int mlx4_create_eq(struct mlx4_dev *dev, int nent,
 841                           u8 intr, struct mlx4_eq *eq)
 842 {
 843         struct mlx4_priv *priv = mlx4_priv(dev);
 844         struct mlx4_cmd_mailbox *mailbox;
 845         struct mlx4_eq_context *eq_context;
 846         int npages;
 847         u64 *dma_list = NULL;
 848         dma_addr_t t;
 849         u64 mtt_addr;
 850         int err = -ENOMEM;
 851         int i;
 852
 853         eq->dev   = dev;
 854         eq->nent  = roundup_pow_of_two(max(nent, 2));
 855         npages = PAGE_ALIGN(eq->nent * MLX4_EQ_ENTRY_SIZE) / PAGE_SIZE;
 856
 857         eq->page_list = kmalloc(npages * sizeof *eq->page_list,
 858                                 GFP_KERNEL);
 859         if (!eq->page_list)
 860                 goto err_out;
 861
 862         for (i = 0; i < npages; ++i)
 863                 eq->page_list[i].buf = NULL;
 864
 865         dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
 866         if (!dma_list)
 867                 goto err_out_free;
 868
 869         mailbox = mlx4_alloc_cmd_mailbox(dev);
 870         if (IS_ERR(mailbox))
 871                 goto err_out_free;
 872         eq_context = mailbox->buf;
 873
 874         for (i = 0; i < npages; ++i) {
 875                 eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
 876                                                           PAGE_SIZE, &t, GFP_KERNEL);
 877                 if (!eq->page_list[i].buf)
 878                         goto err_out_free_pages;
 879
 880                 dma_list[i] = t;
 881                 eq->page_list[i].map = t;
 882
 883                 memset(eq->page_list[i].buf, 0, PAGE_SIZE);
 884         }
 885
 886         eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
 887         if (eq->eqn == -1)
 888                 goto err_out_free_pages;
 889
 890         eq->doorbell = mlx4_get_eq_uar(dev, eq);
 891         if (!eq->doorbell) {
 892                 err = -ENOMEM;
 893                 goto err_out_free_eq;
 894         }
 895
 896         err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
 897         if (err)
 898                 goto err_out_free_eq;
 899
 900         err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
 901         if (err)
 902                 goto err_out_free_mtt;
 903
 904         memset(eq_context, 0, sizeof *eq_context);
 905         eq_context->flags         = cpu_to_be32(MLX4_EQ_STATUS_OK   |
 906                                                 MLX4_EQ_STATE_ARMED);
 907         eq_context->log_eq_size   = ilog2(eq->nent);
 908         eq_context->intr          = intr;
 909         eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
 910
 911         mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
 912         eq_context->mtt_base_addr_h = mtt_addr >> 32;
 913         eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
 914
 915         err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
 916         if (err) {
 917                 mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
 918                 goto err_out_free_mtt;
 919         }
 920
 921         kfree(dma_list);
 922         mlx4_free_cmd_mailbox(dev, mailbox);
 923
 924         eq->cons_index = 0;
 925
 926         return err;
 927
 928 err_out_free_mtt:
 929         mlx4_mtt_cleanup(dev, &eq->mtt);
 930
 931 err_out_free_eq:
 932         mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
 933
 934 err_out_free_pages:
 935         for (i = 0; i < npages; ++i)
 936                 if (eq->page_list[i].buf)
 937                         dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
 938                                           eq->page_list[i].buf,
 939                                           eq->page_list[i].map);
 940
 941         mlx4_free_cmd_mailbox(dev, mailbox);
 942
 943 err_out_free:
 944         kfree(eq->page_list);
 945         kfree(dma_list);
 946
 947 err_out:
 948         return err;
 949 }
 950
 951 static void mlx4_free_eq(struct mlx4_dev *dev,
 952                          struct mlx4_eq *eq)
 953 {
 954         struct mlx4_priv *priv = mlx4_priv(dev);
 955         struct mlx4_cmd_mailbox *mailbox;
 956         int err;
 957         int npages = PAGE_ALIGN(MLX4_EQ_ENTRY_SIZE * eq->nent) / PAGE_SIZE;
 958         int i;
 959
 960         mailbox = mlx4_alloc_cmd_mailbox(dev);
 961         if (IS_ERR(mailbox))
 962                 return;
 963
 964         err = mlx4_HW2SW_EQ(dev, mailbox, eq->eqn);
 965         if (err)
 966                 mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
 967
 968         if (0) {
 969                 mlx4_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
 970                 for (i = 0; i < sizeof (struct mlx4_eq_context) / 4; ++i) {
 971                         if (i % 4 == 0)
 972                                 pr_cont("[%02x] ", i * 4);
 973                         pr_cont(" %08x", be32_to_cpup(mailbox->buf + i * 4));
 974                         if ((i + 1) % 4 == 0)
 975                                 pr_cont("\n");
 976                 }
 977         }
 978
 979         mlx4_mtt_cleanup(dev, &eq->mtt);
 980         for (i = 0; i < npages; ++i)
 981                 dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
 982                                     eq->page_list[i].buf,
 983                                     eq->page_list[i].map);
 984
 985         kfree(eq->page_list);
 986         mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
 987         mlx4_free_cmd_mailbox(dev, mailbox);
 988 }
 989
 990 static void mlx4_free_irqs(struct mlx4_dev *dev)
 991 {
 992         struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
 993         struct mlx4_priv *priv = mlx4_priv(dev);
 994         int     i, vec;
 995
 996         if (eq_table->have_irq)
 997                 free_irq(dev->pdev->irq, dev);
 998
 999         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
1000                 if (eq_table->eq[i].have_irq) {
1001                         free_irq(eq_table->eq[i].irq, eq_table->eq + i);
1002                         eq_table->eq[i].have_irq = 0;
1003                 }
1004
1005         for (i = 0; i < dev->caps.comp_pool; i++) {
1006                 /*
1007                  * Freeing the assigned irq's
1008                  * all bits should be 0, but we need to validate
1009                  */
1010                 if (priv->msix_ctl.pool_bm & 1ULL << i) {
1011                         /* NO need protecting*/
1012                         vec = dev->caps.num_comp_vectors + 1 + i;
1013                         free_irq(priv->eq_table.eq[vec].irq,
1014                                  &priv->eq_table.eq[vec]);
1015                 }
1016         }
1017
1018
1019         kfree(eq_table->irq_names);
1020 }
1021
1022 static int mlx4_map_clr_int(struct mlx4_dev *dev)
1023 {
1024         struct mlx4_priv *priv = mlx4_priv(dev);
1025
1026         priv->clr_base = ioremap(pci_resource_start(dev->pdev, priv->fw.clr_int_bar) +
1027                                  priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
1028         if (!priv->clr_base) {
1029                 mlx4_err(dev, "Couldn't map interrupt clear register, aborting.\n");
1030                 return -ENOMEM;
1031         }
1032
1033         return 0;
1034 }
1035
1036 static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
1037 {
1038         struct mlx4_priv *priv = mlx4_priv(dev);
1039
1040         iounmap(priv->clr_base);
1041 }
1042
1043 int mlx4_alloc_eq_table(struct mlx4_dev *dev)
1044 {
1045         struct mlx4_priv *priv = mlx4_priv(dev);
1046
1047         priv->eq_table.eq = kcalloc(dev->caps.num_eqs - dev->caps.reserved_eqs,
1048                                     sizeof *priv->eq_table.eq, GFP_KERNEL);
1049         if (!priv->eq_table.eq)
1050                 return -ENOMEM;
1051
1052         return 0;
1053 }
1054
1055 void mlx4_free_eq_table(struct mlx4_dev *dev)
1056 {
1057         kfree(mlx4_priv(dev)->eq_table.eq);
1058 }
1059
1060 int mlx4_init_eq_table(struct mlx4_dev *dev)
1061 {
1062         struct mlx4_priv *priv = mlx4_priv(dev);
1063         int err;
1064         int i;
1065
1066         priv->eq_table.uar_map = kcalloc(mlx4_num_eq_uar(dev),
1067                                          sizeof *priv->eq_table.uar_map,
1068                                          GFP_KERNEL);
1069         if (!priv->eq_table.uar_map) {
1070                 err = -ENOMEM;
1071                 goto err_out_free;
1072         }
1073
1074         err = mlx4_bitmap_init(&priv->eq_table.bitmap, dev->caps.num_eqs,
1075                                dev->caps.num_eqs - 1, dev->caps.reserved_eqs, 0);
1076         if (err)
1077                 goto err_out_free;
1078
1079         for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
1080                 priv->eq_table.uar_map[i] = NULL;
1081
1082         if (!mlx4_is_slave(dev)) {
1083                 err = mlx4_map_clr_int(dev);
1084                 if (err)
1085                         goto err_out_bitmap;
1086
1087                 priv->eq_table.clr_mask =
1088                         swab32(1 << (priv->eq_table.inta_pin & 31));
1089                 priv->eq_table.clr_int  = priv->clr_base +
1090                         (priv->eq_table.inta_pin < 32 ? 4 : 0);
1091         }
1092
1093         priv->eq_table.irq_names =
1094                 kmalloc(MLX4_IRQNAME_SIZE * (dev->caps.num_comp_vectors + 1 +
1095                                              dev->caps.comp_pool),
1096                         GFP_KERNEL);
1097         if (!priv->eq_table.irq_names) {
1098                 err = -ENOMEM;
1099                 goto err_out_bitmap;
1100         }
1101
1102         for (i = 0; i < dev->caps.num_comp_vectors; ++i) {
1103                 err = mlx4_create_eq(dev, dev->caps.num_cqs -
1104                                           dev->caps.reserved_cqs +
1105                                           MLX4_NUM_SPARE_EQE,
1106                                      (dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
1107                                      &priv->eq_table.eq[i]);
1108                 if (err) {
1109                         --i;
1110                         goto err_out_unmap;
1111                 }
1112         }
1113
1114         err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
1115                              (dev->flags & MLX4_FLAG_MSI_X) ? dev->caps.num_comp_vectors : 0,
1116                              &priv->eq_table.eq[dev->caps.num_comp_vectors]);
1117         if (err)
1118                 goto err_out_comp;
1119
1120         /*if additional completion vectors poolsize is 0 this loop will not run*/
1121         for (i = dev->caps.num_comp_vectors + 1;
1122               i < dev->caps.num_comp_vectors + dev->caps.comp_pool + 1; ++i) {
1123
1124                 err = mlx4_create_eq(dev, dev->caps.num_cqs -
1125                                           dev->caps.reserved_cqs +
1126                                           MLX4_NUM_SPARE_EQE,
1127                                      (dev->flags & MLX4_FLAG_MSI_X) ? i : 0,
1128                                      &priv->eq_table.eq[i]);
1129                 if (err) {
1130                         --i;
1131                         goto err_out_unmap;
1132                 }
1133         }
1134
1135
1136         if (dev->flags & MLX4_FLAG_MSI_X) {
1137                 const char *eq_name;
1138
1139                 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
1140                         if (i < dev->caps.num_comp_vectors) {
1141                                 snprintf(priv->eq_table.irq_names +
1142                                          i * MLX4_IRQNAME_SIZE,
1143                                          MLX4_IRQNAME_SIZE,
1144                                          "mlx4-comp-%d@pci:%s", i,
1145                                          pci_name(dev->pdev));
1146                         } else {
1147                                 snprintf(priv->eq_table.irq_names +
1148                                          i * MLX4_IRQNAME_SIZE,
1149                                          MLX4_IRQNAME_SIZE,
1150                                          "mlx4-async@pci:%s",
1151                                          pci_name(dev->pdev));
1152                         }
1153
1154                         eq_name = priv->eq_table.irq_names +
1155                                   i * MLX4_IRQNAME_SIZE;
1156                         err = request_irq(priv->eq_table.eq[i].irq,
1157                                           mlx4_msi_x_interrupt, 0, eq_name,
1158                                           priv->eq_table.eq + i);
1159                         if (err)
1160                                 goto err_out_async;
1161
1162                         priv->eq_table.eq[i].have_irq = 1;
1163                 }
1164         } else {
1165                 snprintf(priv->eq_table.irq_names,
1166                          MLX4_IRQNAME_SIZE,
1167                          DRV_NAME "@pci:%s",
1168                          pci_name(dev->pdev));
1169                 err = request_irq(dev->pdev->irq, mlx4_interrupt,
1170                                   IRQF_SHARED, priv->eq_table.irq_names, dev);
1171                 if (err)
1172                         goto err_out_async;
1173
1174                 priv->eq_table.have_irq = 1;
1175         }
1176
1177         err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1178                           priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
1179         if (err)
1180                 mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
1181                            priv->eq_table.eq[dev->caps.num_comp_vectors].eqn, err);
1182
1183         for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
1184                 eq_set_ci(&priv->eq_table.eq[i], 1);
1185
1186         return 0;
1187
1188 err_out_async:
1189         mlx4_free_eq(dev, &priv->eq_table.eq[dev->caps.num_comp_vectors]);
1190
1191 err_out_comp:
1192         i = dev->caps.num_comp_vectors - 1;
1193
1194 err_out_unmap:
1195         while (i >= 0) {
1196                 mlx4_free_eq(dev, &priv->eq_table.eq[i]);
1197                 --i;
1198         }
1199         if (!mlx4_is_slave(dev))
1200                 mlx4_unmap_clr_int(dev);
1201         mlx4_free_irqs(dev);
1202
1203 err_out_bitmap:
1204         mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
1205
1206 err_out_free:
1207         kfree(priv->eq_table.uar_map);
1208
1209         return err;
1210 }
1211
1212 void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
1213 {
1214         struct mlx4_priv *priv = mlx4_priv(dev);
1215         int i;
1216
1217         mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 1,
1218                     priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
1219
1220         mlx4_free_irqs(dev);
1221
1222         for (i = 0; i < dev->caps.num_comp_vectors + dev->caps.comp_pool + 1; ++i)
1223                 mlx4_free_eq(dev, &priv->eq_table.eq[i]);
1224
1225         if (!mlx4_is_slave(dev))
1226                 mlx4_unmap_clr_int(dev);
1227
1228         for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
1229                 if (priv->eq_table.uar_map[i])
1230                         iounmap(priv->eq_table.uar_map[i]);
1231
1232         mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
1233
1234         kfree(priv->eq_table.uar_map);
1235 }
1236
1237 /* A test that verifies that we can accept interrupts on all
1238  * the irq vectors of the device.
1239  * Interrupts are checked using the NOP command.
1240  */
1241 int mlx4_test_interrupts(struct mlx4_dev *dev)
1242 {
1243         struct mlx4_priv *priv = mlx4_priv(dev);
1244         int i;
1245         int err;
1246
1247         err = mlx4_NOP(dev);
1248         /* When not in MSI_X, there is only one irq to check */
1249         if (!(dev->flags & MLX4_FLAG_MSI_X) || mlx4_is_slave(dev))
1250                 return err;
1251
1252         /* A loop over all completion vectors, for each vector we will check
1253          * whether it works by mapping command completions to that vector
1254          * and performing a NOP command
1255          */
1256         for(i = 0; !err && (i < dev->caps.num_comp_vectors); ++i) {
1257                 /* Temporary use polling for command completions */
1258                 mlx4_cmd_use_polling(dev);
1259
1260                 /* Map the new eq to handle all asyncronous events */
1261                 err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1262                                   priv->eq_table.eq[i].eqn);
1263                 if (err) {
1264                         mlx4_warn(dev, "Failed mapping eq for interrupt test\n");
1265                         mlx4_cmd_use_events(dev);
1266                         break;
1267                 }
1268
1269                 /* Go back to using events */
1270                 mlx4_cmd_use_events(dev);
1271                 err = mlx4_NOP(dev);
1272         }
1273
1274         /* Return to default */
1275         mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1276                     priv->eq_table.eq[dev->caps.num_comp_vectors].eqn);
1277         return err;
1278 }
1279 EXPORT_SYMBOL(mlx4_test_interrupts);
1280
1281 int mlx4_assign_eq(struct mlx4_dev *dev, char *name, struct cpu_rmap *rmap,
1282                    int *vector)
1283 {
1284
1285         struct mlx4_priv *priv = mlx4_priv(dev);
1286         int vec = 0, err = 0, i;
1287
1288         mutex_lock(&priv->msix_ctl.pool_lock);
1289         for (i = 0; !vec && i < dev->caps.comp_pool; i++) {
1290                 if (~priv->msix_ctl.pool_bm & 1ULL << i) {
1291                         priv->msix_ctl.pool_bm |= 1ULL << i;
1292                         vec = dev->caps.num_comp_vectors + 1 + i;
1293                         snprintf(priv->eq_table.irq_names +
1294                                         vec * MLX4_IRQNAME_SIZE,
1295                                         MLX4_IRQNAME_SIZE, "%s", name);
1296 #ifdef CONFIG_RFS_ACCEL
1297                         if (rmap) {
1298                                 err = irq_cpu_rmap_add(rmap,
1299                                                        priv->eq_table.eq[vec].irq);
1300                                 if (err)
1301                                         mlx4_warn(dev, "Failed adding irq rmap\n");
1302                         }
1303 #endif
1304                         err = request_irq(priv->eq_table.eq[vec].irq,
1305                                           mlx4_msi_x_interrupt, 0,
1306                                           &priv->eq_table.irq_names[vec<<5],
1307                                           priv->eq_table.eq + vec);
1308                         if (err) {
1309                                 /*zero out bit by fliping it*/
1310                                 priv->msix_ctl.pool_bm ^= 1 << i;
1311                                 vec = 0;
1312                                 continue;
1313                                 /*we dont want to break here*/
1314                         }
1315                         eq_set_ci(&priv->eq_table.eq[vec], 1);
1316                 }
1317         }
1318         mutex_unlock(&priv->msix_ctl.pool_lock);
1319
1320         if (vec) {
1321                 *vector = vec;
1322         } else {
1323                 *vector = 0;
1324                 err = (i == dev->caps.comp_pool) ? -ENOSPC : err;
1325         }
1326         return err;
1327 }
1328 EXPORT_SYMBOL(mlx4_assign_eq);
1329
1330 void mlx4_release_eq(struct mlx4_dev *dev, int vec)
1331 {
1332         struct mlx4_priv *priv = mlx4_priv(dev);
1333         /*bm index*/
1334         int i = vec - dev->caps.num_comp_vectors - 1;
1335
1336         if (likely(i >= 0)) {
1337                 /*sanity check , making sure were not trying to free irq's
1338                   Belonging to a legacy EQ*/
1339                 mutex_lock(&priv->msix_ctl.pool_lock);
1340                 if (priv->msix_ctl.pool_bm & 1ULL << i) {
1341                         free_irq(priv->eq_table.eq[vec].irq,
1342                                  &priv->eq_table.eq[vec]);
1343                         priv->msix_ctl.pool_bm &= ~(1ULL << i);
1344                 }
1345                 mutex_unlock(&priv->msix_ctl.pool_lock);
1346         }
1347
1348 }
1349 EXPORT_SYMBOL(mlx4_release_eq);
1350