linux/drivers/net/ethernet/mellanox/mlx4/eq.c
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   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/interrupt.h>
  35#include <linux/slab.h>
  36#include <linux/export.h>
  37#include <linux/mm.h>
  38#include <linux/dma-mapping.h>
  39
  40#include <linux/mlx4/cmd.h>
  41#include <linux/cpu_rmap.h>
  42
  43#include "mlx4.h"
  44#include "fw.h"
  45
  46enum {
  47        MLX4_IRQNAME_SIZE       = 32
  48};
  49
  50enum {
  51        MLX4_NUM_ASYNC_EQE      = 0x100,
  52        MLX4_NUM_SPARE_EQE      = 0x80,
  53        MLX4_EQ_ENTRY_SIZE      = 0x20
  54};
  55
  56#define MLX4_EQ_STATUS_OK          ( 0 << 28)
  57#define MLX4_EQ_STATUS_WRITE_FAIL  (10 << 28)
  58#define MLX4_EQ_OWNER_SW           ( 0 << 24)
  59#define MLX4_EQ_OWNER_HW           ( 1 << 24)
  60#define MLX4_EQ_FLAG_EC            ( 1 << 18)
  61#define MLX4_EQ_FLAG_OI            ( 1 << 17)
  62#define MLX4_EQ_STATE_ARMED        ( 9 <<  8)
  63#define MLX4_EQ_STATE_FIRED        (10 <<  8)
  64#define MLX4_EQ_STATE_ALWAYS_ARMED (11 <<  8)
  65
  66#define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG)           | \
  67                               (1ull << MLX4_EVENT_TYPE_COMM_EST)           | \
  68                               (1ull << MLX4_EVENT_TYPE_SQ_DRAINED)         | \
  69                               (1ull << MLX4_EVENT_TYPE_CQ_ERROR)           | \
  70                               (1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR)     | \
  71                               (1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR)    | \
  72                               (1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED)    | \
  73                               (1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
  74                               (1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR)    | \
  75                               (1ull << MLX4_EVENT_TYPE_PORT_CHANGE)        | \
  76                               (1ull << MLX4_EVENT_TYPE_ECC_DETECT)         | \
  77                               (1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)    | \
  78                               (1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE)    | \
  79                               (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT)          | \
  80                               (1ull << MLX4_EVENT_TYPE_CMD)                | \
  81                               (1ull << MLX4_EVENT_TYPE_OP_REQUIRED)        | \
  82                               (1ull << MLX4_EVENT_TYPE_COMM_CHANNEL)       | \
  83                               (1ull << MLX4_EVENT_TYPE_FLR_EVENT)          | \
  84                               (1ull << MLX4_EVENT_TYPE_FATAL_WARNING))
  85
  86static 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        if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RECOVERABLE_ERROR_EVENT)
  92                async_ev_mask |= (1ull << MLX4_EVENT_TYPE_RECOVERABLE_ERROR_EVENT);
  93
  94        return async_ev_mask;
  95}
  96
  97static void eq_set_ci(struct mlx4_eq *eq, int req_not)
  98{
  99        __raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
 100                                               req_not << 31),
 101                     eq->doorbell);
 102        /* We still want ordering, just not swabbing, so add a barrier */
 103        wmb();
 104}
 105
 106static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry, u8 eqe_factor,
 107                                u8 eqe_size)
 108{
 109        /* (entry & (eq->nent - 1)) gives us a cyclic array */
 110        unsigned long offset = (entry & (eq->nent - 1)) * eqe_size;
 111        /* CX3 is capable of extending the EQE from 32 to 64 bytes with
 112         * strides of 64B,128B and 256B.
 113         * When 64B EQE is used, the first (in the lower addresses)
 114         * 32 bytes in the 64 byte EQE are reserved and the next 32 bytes
 115         * contain the legacy EQE information.
 116         * In all other cases, the first 32B contains the legacy EQE info.
 117         */
 118        return eq->page_list[offset / PAGE_SIZE].buf + (offset + (eqe_factor ? MLX4_EQ_ENTRY_SIZE : 0)) % PAGE_SIZE;
 119}
 120
 121static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq, u8 eqe_factor, u8 size)
 122{
 123        struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index, eqe_factor, size);
 124        return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
 125}
 126
 127static struct mlx4_eqe *next_slave_event_eqe(struct mlx4_slave_event_eq *slave_eq)
 128{
 129        struct mlx4_eqe *eqe =
 130                &slave_eq->event_eqe[slave_eq->cons & (SLAVE_EVENT_EQ_SIZE - 1)];
 131        return (!!(eqe->owner & 0x80) ^
 132                !!(slave_eq->cons & SLAVE_EVENT_EQ_SIZE)) ?
 133                eqe : NULL;
 134}
 135
 136void mlx4_gen_slave_eqe(struct work_struct *work)
 137{
 138        struct mlx4_mfunc_master_ctx *master =
 139                container_of(work, struct mlx4_mfunc_master_ctx,
 140                             slave_event_work);
 141        struct mlx4_mfunc *mfunc =
 142                container_of(master, struct mlx4_mfunc, master);
 143        struct mlx4_priv *priv = container_of(mfunc, struct mlx4_priv, mfunc);
 144        struct mlx4_dev *dev = &priv->dev;
 145        struct mlx4_slave_event_eq *slave_eq = &mfunc->master.slave_eq;
 146        struct mlx4_eqe *eqe;
 147        u8 slave;
 148        int i, phys_port, slave_port;
 149
 150        for (eqe = next_slave_event_eqe(slave_eq); eqe;
 151              eqe = next_slave_event_eqe(slave_eq)) {
 152                slave = eqe->slave_id;
 153
 154                if (eqe->type == MLX4_EVENT_TYPE_PORT_CHANGE &&
 155                    eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN &&
 156                    mlx4_is_bonded(dev)) {
 157                        struct mlx4_port_cap port_cap;
 158
 159                        if (!mlx4_QUERY_PORT(dev, 1, &port_cap) && port_cap.link_state)
 160                                goto consume;
 161
 162                        if (!mlx4_QUERY_PORT(dev, 2, &port_cap) && port_cap.link_state)
 163                                goto consume;
 164                }
 165                /* All active slaves need to receive the event */
 166                if (slave == ALL_SLAVES) {
 167                        for (i = 0; i <= dev->persist->num_vfs; i++) {
 168                                phys_port = 0;
 169                                if (eqe->type == MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT &&
 170                                    eqe->subtype == MLX4_DEV_PMC_SUBTYPE_PORT_INFO) {
 171                                        phys_port  = eqe->event.port_mgmt_change.port;
 172                                        slave_port = mlx4_phys_to_slave_port(dev, i, phys_port);
 173                                        if (slave_port < 0) /* VF doesn't have this port */
 174                                                continue;
 175                                        eqe->event.port_mgmt_change.port = slave_port;
 176                                }
 177                                if (mlx4_GEN_EQE(dev, i, eqe))
 178                                        mlx4_warn(dev, "Failed to generate event for slave %d\n",
 179                                                  i);
 180                                if (phys_port)
 181                                        eqe->event.port_mgmt_change.port = phys_port;
 182                        }
 183                } else {
 184                        if (mlx4_GEN_EQE(dev, slave, eqe))
 185                                mlx4_warn(dev, "Failed to generate event for slave %d\n",
 186                                          slave);
 187                }
 188consume:
 189                ++slave_eq->cons;
 190        }
 191}
 192
 193
 194static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe)
 195{
 196        struct mlx4_priv *priv = mlx4_priv(dev);
 197        struct mlx4_slave_event_eq *slave_eq = &priv->mfunc.master.slave_eq;
 198        struct mlx4_eqe *s_eqe;
 199        unsigned long flags;
 200
 201        spin_lock_irqsave(&slave_eq->event_lock, flags);
 202        s_eqe = &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)];
 203        if ((!!(s_eqe->owner & 0x80)) ^
 204            (!!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE))) {
 205                mlx4_warn(dev, "Master failed to generate an EQE for slave: %d. No free EQE on slave events queue\n",
 206                          slave);
 207                spin_unlock_irqrestore(&slave_eq->event_lock, flags);
 208                return;
 209        }
 210
 211        memcpy(s_eqe, eqe, sizeof(struct mlx4_eqe) - 1);
 212        s_eqe->slave_id = slave;
 213        /* ensure all information is written before setting the ownersip bit */
 214        dma_wmb();
 215        s_eqe->owner = !!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE) ? 0x0 : 0x80;
 216        ++slave_eq->prod;
 217
 218        queue_work(priv->mfunc.master.comm_wq,
 219                   &priv->mfunc.master.slave_event_work);
 220        spin_unlock_irqrestore(&slave_eq->event_lock, flags);
 221}
 222
 223static void mlx4_slave_event(struct mlx4_dev *dev, int slave,
 224                             struct mlx4_eqe *eqe)
 225{
 226        struct mlx4_priv *priv = mlx4_priv(dev);
 227
 228        if (slave < 0 || slave > dev->persist->num_vfs ||
 229            slave == dev->caps.function ||
 230            !priv->mfunc.master.slave_state[slave].active)
 231                return;
 232
 233        slave_event(dev, slave, eqe);
 234}
 235
 236#if defined(CONFIG_SMP)
 237static void mlx4_set_eq_affinity_hint(struct mlx4_priv *priv, int vec)
 238{
 239        int hint_err;
 240        struct mlx4_dev *dev = &priv->dev;
 241        struct mlx4_eq *eq = &priv->eq_table.eq[vec];
 242
 243        if (!cpumask_available(eq->affinity_mask) ||
 244            cpumask_empty(eq->affinity_mask))
 245                return;
 246
 247        hint_err = irq_set_affinity_hint(eq->irq, eq->affinity_mask);
 248        if (hint_err)
 249                mlx4_warn(dev, "irq_set_affinity_hint failed, err %d\n", hint_err);
 250}
 251#endif
 252
 253int mlx4_gen_pkey_eqe(struct mlx4_dev *dev, int slave, u8 port)
 254{
 255        struct mlx4_eqe eqe;
 256
 257        struct mlx4_priv *priv = mlx4_priv(dev);
 258        struct mlx4_slave_state *s_slave = &priv->mfunc.master.slave_state[slave];
 259
 260        if (!s_slave->active)
 261                return 0;
 262
 263        memset(&eqe, 0, sizeof(eqe));
 264
 265        eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
 266        eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE;
 267        eqe.event.port_mgmt_change.port = mlx4_phys_to_slave_port(dev, slave, port);
 268
 269        return mlx4_GEN_EQE(dev, slave, &eqe);
 270}
 271EXPORT_SYMBOL(mlx4_gen_pkey_eqe);
 272
 273int mlx4_gen_guid_change_eqe(struct mlx4_dev *dev, int slave, u8 port)
 274{
 275        struct mlx4_eqe eqe;
 276
 277        /*don't send if we don't have the that slave */
 278        if (dev->persist->num_vfs < slave)
 279                return 0;
 280        memset(&eqe, 0, sizeof(eqe));
 281
 282        eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
 283        eqe.subtype = MLX4_DEV_PMC_SUBTYPE_GUID_INFO;
 284        eqe.event.port_mgmt_change.port = mlx4_phys_to_slave_port(dev, slave, port);
 285
 286        return mlx4_GEN_EQE(dev, slave, &eqe);
 287}
 288EXPORT_SYMBOL(mlx4_gen_guid_change_eqe);
 289
 290int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port,
 291                                   u8 port_subtype_change)
 292{
 293        struct mlx4_eqe eqe;
 294        u8 slave_port = mlx4_phys_to_slave_port(dev, slave, port);
 295
 296        /*don't send if we don't have the that slave */
 297        if (dev->persist->num_vfs < slave)
 298                return 0;
 299        memset(&eqe, 0, sizeof(eqe));
 300
 301        eqe.type = MLX4_EVENT_TYPE_PORT_CHANGE;
 302        eqe.subtype = port_subtype_change;
 303        eqe.event.port_change.port = cpu_to_be32(slave_port << 28);
 304
 305        mlx4_dbg(dev, "%s: sending: %d to slave: %d on port: %d\n", __func__,
 306                 port_subtype_change, slave, port);
 307        return mlx4_GEN_EQE(dev, slave, &eqe);
 308}
 309EXPORT_SYMBOL(mlx4_gen_port_state_change_eqe);
 310
 311enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port)
 312{
 313        struct mlx4_priv *priv = mlx4_priv(dev);
 314        struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
 315        struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
 316
 317        if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
 318            port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
 319                pr_err("%s: Error: asking for slave:%d, port:%d\n",
 320                       __func__, slave, port);
 321                return SLAVE_PORT_DOWN;
 322        }
 323        return s_state[slave].port_state[port];
 324}
 325EXPORT_SYMBOL(mlx4_get_slave_port_state);
 326
 327static int mlx4_set_slave_port_state(struct mlx4_dev *dev, int slave, u8 port,
 328                                     enum slave_port_state state)
 329{
 330        struct mlx4_priv *priv = mlx4_priv(dev);
 331        struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state;
 332        struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
 333
 334        if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
 335            port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
 336                pr_err("%s: Error: asking for slave:%d, port:%d\n",
 337                       __func__, slave, port);
 338                return -1;
 339        }
 340        s_state[slave].port_state[port] = state;
 341
 342        return 0;
 343}
 344
 345static void set_all_slave_state(struct mlx4_dev *dev, u8 port, int event)
 346{
 347        int i;
 348        enum slave_port_gen_event gen_event;
 349        struct mlx4_slaves_pport slaves_pport = mlx4_phys_to_slaves_pport(dev,
 350                                                                          port);
 351
 352        for (i = 0; i < dev->persist->num_vfs + 1; i++)
 353                if (test_bit(i, slaves_pport.slaves))
 354                        set_and_calc_slave_port_state(dev, i, port,
 355                                                      event, &gen_event);
 356}
 357/**************************************************************************
 358        The function get as input the new event to that port,
 359        and according to the prev state change the slave's port state.
 360        The events are:
 361                MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
 362                MLX4_PORT_STATE_DEV_EVENT_PORT_UP
 363                MLX4_PORT_STATE_IB_EVENT_GID_VALID
 364                MLX4_PORT_STATE_IB_EVENT_GID_INVALID
 365***************************************************************************/
 366int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave,
 367                                  u8 port, int event,
 368                                  enum slave_port_gen_event *gen_event)
 369{
 370        struct mlx4_priv *priv = mlx4_priv(dev);
 371        struct mlx4_slave_state *ctx = NULL;
 372        unsigned long flags;
 373        int ret = -1;
 374        struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
 375        enum slave_port_state cur_state =
 376                mlx4_get_slave_port_state(dev, slave, port);
 377
 378        *gen_event = SLAVE_PORT_GEN_EVENT_NONE;
 379
 380        if (slave >= dev->num_slaves || port > dev->caps.num_ports ||
 381            port <= 0 || !test_bit(port - 1, actv_ports.ports)) {
 382                pr_err("%s: Error: asking for slave:%d, port:%d\n",
 383                       __func__, slave, port);
 384                return ret;
 385        }
 386
 387        ctx = &priv->mfunc.master.slave_state[slave];
 388        spin_lock_irqsave(&ctx->lock, flags);
 389
 390        switch (cur_state) {
 391        case SLAVE_PORT_DOWN:
 392                if (MLX4_PORT_STATE_DEV_EVENT_PORT_UP == event)
 393                        mlx4_set_slave_port_state(dev, slave, port,
 394                                                  SLAVE_PENDING_UP);
 395                break;
 396        case SLAVE_PENDING_UP:
 397                if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event)
 398                        mlx4_set_slave_port_state(dev, slave, port,
 399                                                  SLAVE_PORT_DOWN);
 400                else if (MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID == event) {
 401                        mlx4_set_slave_port_state(dev, slave, port,
 402                                                  SLAVE_PORT_UP);
 403                        *gen_event = SLAVE_PORT_GEN_EVENT_UP;
 404                }
 405                break;
 406        case SLAVE_PORT_UP:
 407                if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event) {
 408                        mlx4_set_slave_port_state(dev, slave, port,
 409                                                  SLAVE_PORT_DOWN);
 410                        *gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
 411                } else if (MLX4_PORT_STATE_IB_EVENT_GID_INVALID ==
 412                                event) {
 413                        mlx4_set_slave_port_state(dev, slave, port,
 414                                                  SLAVE_PENDING_UP);
 415                        *gen_event = SLAVE_PORT_GEN_EVENT_DOWN;
 416                }
 417                break;
 418        default:
 419                pr_err("%s: BUG!!! UNKNOWN state: slave:%d, port:%d\n",
 420                       __func__, slave, port);
 421                goto out;
 422        }
 423        ret = mlx4_get_slave_port_state(dev, slave, port);
 424
 425out:
 426        spin_unlock_irqrestore(&ctx->lock, flags);
 427        return ret;
 428}
 429
 430EXPORT_SYMBOL(set_and_calc_slave_port_state);
 431
 432int mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev *dev, u8 port, int attr)
 433{
 434        struct mlx4_eqe eqe;
 435
 436        memset(&eqe, 0, sizeof(eqe));
 437
 438        eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT;
 439        eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PORT_INFO;
 440        eqe.event.port_mgmt_change.port = port;
 441        eqe.event.port_mgmt_change.params.port_info.changed_attr =
 442                cpu_to_be32((u32) attr);
 443
 444        slave_event(dev, ALL_SLAVES, &eqe);
 445        return 0;
 446}
 447EXPORT_SYMBOL(mlx4_gen_slaves_port_mgt_ev);
 448
 449void mlx4_master_handle_slave_flr(struct work_struct *work)
 450{
 451        struct mlx4_mfunc_master_ctx *master =
 452                container_of(work, struct mlx4_mfunc_master_ctx,
 453                             slave_flr_event_work);
 454        struct mlx4_mfunc *mfunc =
 455                container_of(master, struct mlx4_mfunc, master);
 456        struct mlx4_priv *priv =
 457                container_of(mfunc, struct mlx4_priv, mfunc);
 458        struct mlx4_dev *dev = &priv->dev;
 459        struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
 460        int i;
 461        int err;
 462        unsigned long flags;
 463
 464        mlx4_dbg(dev, "mlx4_handle_slave_flr\n");
 465
 466        for (i = 0 ; i < dev->num_slaves; i++) {
 467
 468                if (MLX4_COMM_CMD_FLR == slave_state[i].last_cmd) {
 469                        mlx4_dbg(dev, "mlx4_handle_slave_flr: clean slave: %d\n",
 470                                 i);
 471                        /* In case of 'Reset flow' FLR can be generated for
 472                         * a slave before mlx4_load_one is done.
 473                         * make sure interface is up before trying to delete
 474                         * slave resources which weren't allocated yet.
 475                         */
 476                        if (dev->persist->interface_state &
 477                            MLX4_INTERFACE_STATE_UP)
 478                                mlx4_delete_all_resources_for_slave(dev, i);
 479                        /*return the slave to running mode*/
 480                        spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
 481                        slave_state[i].last_cmd = MLX4_COMM_CMD_RESET;
 482                        slave_state[i].is_slave_going_down = 0;
 483                        spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
 484                        /*notify the FW:*/
 485                        err = mlx4_cmd(dev, 0, i, 0, MLX4_CMD_INFORM_FLR_DONE,
 486                                       MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
 487                        if (err)
 488                                mlx4_warn(dev, "Failed to notify FW on FLR done (slave:%d)\n",
 489                                          i);
 490                }
 491        }
 492}
 493
 494static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
 495{
 496        struct mlx4_priv *priv = mlx4_priv(dev);
 497        struct mlx4_eqe *eqe;
 498        int cqn;
 499        int eqes_found = 0;
 500        int set_ci = 0;
 501        int port;
 502        int slave = 0;
 503        int ret;
 504        u32 flr_slave;
 505        u8 update_slave_state;
 506        int i;
 507        enum slave_port_gen_event gen_event;
 508        unsigned long flags;
 509        struct mlx4_vport_state *s_info;
 510        int eqe_size = dev->caps.eqe_size;
 511
 512        while ((eqe = next_eqe_sw(eq, dev->caps.eqe_factor, eqe_size))) {
 513                /*
 514                 * Make sure we read EQ entry contents after we've
 515                 * checked the ownership bit.
 516                 */
 517                dma_rmb();
 518
 519                switch (eqe->type) {
 520                case MLX4_EVENT_TYPE_COMP:
 521                        cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
 522                        mlx4_cq_completion(dev, cqn);
 523                        break;
 524
 525                case MLX4_EVENT_TYPE_PATH_MIG:
 526                case MLX4_EVENT_TYPE_COMM_EST:
 527                case MLX4_EVENT_TYPE_SQ_DRAINED:
 528                case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
 529                case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
 530                case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
 531                case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
 532                case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
 533                        mlx4_dbg(dev, "event %d arrived\n", eqe->type);
 534                        if (mlx4_is_master(dev)) {
 535                                /* forward only to slave owning the QP */
 536                                ret = mlx4_get_slave_from_resource_id(dev,
 537                                                RES_QP,
 538                                                be32_to_cpu(eqe->event.qp.qpn)
 539                                                & 0xffffff, &slave);
 540                                if (ret && ret != -ENOENT) {
 541                                        mlx4_dbg(dev, "QP event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n",
 542                                                 eqe->type, eqe->subtype,
 543                                                 eq->eqn, eq->cons_index, ret);
 544                                        break;
 545                                }
 546
 547                                if (!ret && slave != dev->caps.function) {
 548                                        mlx4_slave_event(dev, slave, eqe);
 549                                        break;
 550                                }
 551
 552                        }
 553                        mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) &
 554                                      0xffffff, eqe->type);
 555                        break;
 556
 557                case MLX4_EVENT_TYPE_SRQ_LIMIT:
 558                        mlx4_dbg(dev, "%s: MLX4_EVENT_TYPE_SRQ_LIMIT. srq_no=0x%x, eq 0x%x\n",
 559                                 __func__, be32_to_cpu(eqe->event.srq.srqn),
 560                                 eq->eqn);
 561                        /* fall through */
 562                case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
 563                        if (mlx4_is_master(dev)) {
 564                                /* forward only to slave owning the SRQ */
 565                                ret = mlx4_get_slave_from_resource_id(dev,
 566                                                RES_SRQ,
 567                                                be32_to_cpu(eqe->event.srq.srqn)
 568                                                & 0xffffff,
 569                                                &slave);
 570                                if (ret && ret != -ENOENT) {
 571                                        mlx4_warn(dev, "SRQ event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n",
 572                                                  eqe->type, eqe->subtype,
 573                                                  eq->eqn, eq->cons_index, ret);
 574                                        break;
 575                                }
 576                                if (eqe->type ==
 577                                    MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)
 578                                        mlx4_warn(dev, "%s: slave:%d, srq_no:0x%x, event: %02x(%02x)\n",
 579                                                  __func__, slave,
 580                                                  be32_to_cpu(eqe->event.srq.srqn),
 581                                                  eqe->type, eqe->subtype);
 582
 583                                if (!ret && slave != dev->caps.function) {
 584                                        if (eqe->type ==
 585                                            MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)
 586                                                mlx4_warn(dev, "%s: sending event %02x(%02x) to slave:%d\n",
 587                                                          __func__, eqe->type,
 588                                                          eqe->subtype, slave);
 589                                        mlx4_slave_event(dev, slave, eqe);
 590                                        break;
 591                                }
 592                        }
 593                        mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) &
 594                                       0xffffff, eqe->type);
 595                        break;
 596
 597                case MLX4_EVENT_TYPE_CMD:
 598                        mlx4_cmd_event(dev,
 599                                       be16_to_cpu(eqe->event.cmd.token),
 600                                       eqe->event.cmd.status,
 601                                       be64_to_cpu(eqe->event.cmd.out_param));
 602                        break;
 603
 604                case MLX4_EVENT_TYPE_PORT_CHANGE: {
 605                        struct mlx4_slaves_pport slaves_port;
 606                        port = be32_to_cpu(eqe->event.port_change.port) >> 28;
 607                        slaves_port = mlx4_phys_to_slaves_pport(dev, port);
 608                        if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) {
 609                                mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN,
 610                                                    port);
 611                                mlx4_priv(dev)->sense.do_sense_port[port] = 1;
 612                                if (!mlx4_is_master(dev))
 613                                        break;
 614                                for (i = 0; i < dev->persist->num_vfs + 1;
 615                                     i++) {
 616                                        int reported_port = mlx4_is_bonded(dev) ? 1 : mlx4_phys_to_slave_port(dev, i, port);
 617
 618                                        if (!test_bit(i, slaves_port.slaves) && !mlx4_is_bonded(dev))
 619                                                continue;
 620                                        if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) {
 621                                                if (i == mlx4_master_func_num(dev))
 622                                                        continue;
 623                                                mlx4_dbg(dev, "%s: Sending MLX4_PORT_CHANGE_SUBTYPE_DOWN to slave: %d, port:%d\n",
 624                                                         __func__, i, port);
 625                                                s_info = &priv->mfunc.master.vf_oper[i].vport[port].state;
 626                                                if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) {
 627                                                        eqe->event.port_change.port =
 628                                                                cpu_to_be32(
 629                                                                (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
 630                                                                | (reported_port << 28));
 631                                                        mlx4_slave_event(dev, i, eqe);
 632                                                }
 633                                        } else {  /* IB port */
 634                                                set_and_calc_slave_port_state(dev, i, port,
 635                                                                              MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
 636                                                                              &gen_event);
 637                                                /*we can be in pending state, then do not send port_down event*/
 638                                                if (SLAVE_PORT_GEN_EVENT_DOWN ==  gen_event) {
 639                                                        if (i == mlx4_master_func_num(dev))
 640                                                                continue;
 641                                                        eqe->event.port_change.port =
 642                                                                cpu_to_be32(
 643                                                                (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
 644                                                                | (mlx4_phys_to_slave_port(dev, i, port) << 28));
 645                                                        mlx4_slave_event(dev, i, eqe);
 646                                                }
 647                                        }
 648                                }
 649                        } else {
 650                                mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP, port);
 651
 652                                mlx4_priv(dev)->sense.do_sense_port[port] = 0;
 653
 654                                if (!mlx4_is_master(dev))
 655                                        break;
 656                                if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
 657                                        for (i = 0;
 658                                             i < dev->persist->num_vfs + 1;
 659                                             i++) {
 660                                                int reported_port = mlx4_is_bonded(dev) ? 1 : mlx4_phys_to_slave_port(dev, i, port);
 661
 662                                                if (!test_bit(i, slaves_port.slaves) && !mlx4_is_bonded(dev))
 663                                                        continue;
 664                                                if (i == mlx4_master_func_num(dev))
 665                                                        continue;
 666                                                s_info = &priv->mfunc.master.vf_oper[i].vport[port].state;
 667                                                if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) {
 668                                                        eqe->event.port_change.port =
 669                                                                cpu_to_be32(
 670                                                                (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF)
 671                                                                | (reported_port << 28));
 672                                                        mlx4_slave_event(dev, i, eqe);
 673                                                }
 674                                        }
 675                                else /* IB port */
 676                                        /* port-up event will be sent to a slave when the
 677                                         * slave's alias-guid is set. This is done in alias_GUID.c
 678                                         */
 679                                        set_all_slave_state(dev, port, MLX4_DEV_EVENT_PORT_UP);
 680                        }
 681                        break;
 682                }
 683
 684                case MLX4_EVENT_TYPE_CQ_ERROR:
 685                        mlx4_warn(dev, "CQ %s on CQN %06x\n",
 686                                  eqe->event.cq_err.syndrome == 1 ?
 687                                  "overrun" : "access violation",
 688                                  be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
 689                        if (mlx4_is_master(dev)) {
 690                                ret = mlx4_get_slave_from_resource_id(dev,
 691                                        RES_CQ,
 692                                        be32_to_cpu(eqe->event.cq_err.cqn)
 693                                        & 0xffffff, &slave);
 694                                if (ret && ret != -ENOENT) {
 695                                        mlx4_dbg(dev, "CQ event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n",
 696                                                 eqe->type, eqe->subtype,
 697                                                 eq->eqn, eq->cons_index, ret);
 698                                        break;
 699                                }
 700
 701                                if (!ret && slave != dev->caps.function) {
 702                                        mlx4_slave_event(dev, slave, eqe);
 703                                        break;
 704                                }
 705                        }
 706                        mlx4_cq_event(dev,
 707                                      be32_to_cpu(eqe->event.cq_err.cqn)
 708                                      & 0xffffff,
 709                                      eqe->type);
 710                        break;
 711
 712                case MLX4_EVENT_TYPE_EQ_OVERFLOW:
 713                        mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
 714                        break;
 715
 716                case MLX4_EVENT_TYPE_OP_REQUIRED:
 717                        atomic_inc(&priv->opreq_count);
 718                        /* FW commands can't be executed from interrupt context
 719                         * working in deferred task
 720                         */
 721                        queue_work(mlx4_wq, &priv->opreq_task);
 722                        break;
 723
 724                case MLX4_EVENT_TYPE_COMM_CHANNEL:
 725                        if (!mlx4_is_master(dev)) {
 726                                mlx4_warn(dev, "Received comm channel event for non master device\n");
 727                                break;
 728                        }
 729                        memcpy(&priv->mfunc.master.comm_arm_bit_vector,
 730                               eqe->event.comm_channel_arm.bit_vec,
 731                               sizeof(eqe->event.comm_channel_arm.bit_vec));
 732                        queue_work(priv->mfunc.master.comm_wq,
 733                                   &priv->mfunc.master.comm_work);
 734                        break;
 735
 736                case MLX4_EVENT_TYPE_FLR_EVENT:
 737                        flr_slave = be32_to_cpu(eqe->event.flr_event.slave_id);
 738                        if (!mlx4_is_master(dev)) {
 739                                mlx4_warn(dev, "Non-master function received FLR event\n");
 740                                break;
 741                        }
 742
 743                        mlx4_dbg(dev, "FLR event for slave: %d\n", flr_slave);
 744
 745                        if (flr_slave >= dev->num_slaves) {
 746                                mlx4_warn(dev,
 747                                          "Got FLR for unknown function: %d\n",
 748                                          flr_slave);
 749                                update_slave_state = 0;
 750                        } else
 751                                update_slave_state = 1;
 752
 753                        spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags);
 754                        if (update_slave_state) {
 755                                priv->mfunc.master.slave_state[flr_slave].active = false;
 756                                priv->mfunc.master.slave_state[flr_slave].last_cmd = MLX4_COMM_CMD_FLR;
 757                                priv->mfunc.master.slave_state[flr_slave].is_slave_going_down = 1;
 758                        }
 759                        spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
 760                        mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN,
 761                                            flr_slave);
 762                        queue_work(priv->mfunc.master.comm_wq,
 763                                   &priv->mfunc.master.slave_flr_event_work);
 764                        break;
 765
 766                case MLX4_EVENT_TYPE_FATAL_WARNING:
 767                        if (eqe->subtype == MLX4_FATAL_WARNING_SUBTYPE_WARMING) {
 768                                if (mlx4_is_master(dev))
 769                                        for (i = 0; i < dev->num_slaves; i++) {
 770                                                mlx4_dbg(dev, "%s: Sending MLX4_FATAL_WARNING_SUBTYPE_WARMING to slave: %d\n",
 771                                                         __func__, i);
 772                                                if (i == dev->caps.function)
 773                                                        continue;
 774                                                mlx4_slave_event(dev, i, eqe);
 775                                        }
 776                                mlx4_err(dev, "Temperature Threshold was reached! Threshold: %d celsius degrees; Current Temperature: %d\n",
 777                                         be16_to_cpu(eqe->event.warming.warning_threshold),
 778                                         be16_to_cpu(eqe->event.warming.current_temperature));
 779                        } else
 780                                mlx4_warn(dev, "Unhandled event FATAL WARNING (%02x), subtype %02x on EQ %d at index %u. owner=%x, nent=0x%x, slave=%x, ownership=%s\n",
 781                                          eqe->type, eqe->subtype, eq->eqn,
 782                                          eq->cons_index, eqe->owner, eq->nent,
 783                                          eqe->slave_id,
 784                                          !!(eqe->owner & 0x80) ^
 785                                          !!(eq->cons_index & eq->nent) ? "HW" : "SW");
 786
 787                        break;
 788
 789                case MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT:
 790                        mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE,
 791                                            (unsigned long) eqe);
 792                        break;
 793
 794                case MLX4_EVENT_TYPE_RECOVERABLE_ERROR_EVENT:
 795                        switch (eqe->subtype) {
 796                        case MLX4_RECOVERABLE_ERROR_EVENT_SUBTYPE_BAD_CABLE:
 797                                mlx4_warn(dev, "Bad cable detected on port %u\n",
 798                                          eqe->event.bad_cable.port);
 799                                break;
 800                        case MLX4_RECOVERABLE_ERROR_EVENT_SUBTYPE_UNSUPPORTED_CABLE:
 801                                mlx4_warn(dev, "Unsupported cable detected\n");
 802                                break;
 803                        default:
 804                                mlx4_dbg(dev,
 805                                         "Unhandled recoverable error event detected: %02x(%02x) on EQ %d at index %u. owner=%x, nent=0x%x, ownership=%s\n",
 806                                         eqe->type, eqe->subtype, eq->eqn,
 807                                         eq->cons_index, eqe->owner, eq->nent,
 808                                         !!(eqe->owner & 0x80) ^
 809                                         !!(eq->cons_index & eq->nent) ? "HW" : "SW");
 810                                break;
 811                        }
 812                        break;
 813
 814                case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
 815                case MLX4_EVENT_TYPE_ECC_DETECT:
 816                default:
 817                        mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at index %u. owner=%x, nent=0x%x, slave=%x, ownership=%s\n",
 818                                  eqe->type, eqe->subtype, eq->eqn,
 819                                  eq->cons_index, eqe->owner, eq->nent,
 820                                  eqe->slave_id,
 821                                  !!(eqe->owner & 0x80) ^
 822                                  !!(eq->cons_index & eq->nent) ? "HW" : "SW");
 823                        break;
 824                }
 825
 826                ++eq->cons_index;
 827                eqes_found = 1;
 828                ++set_ci;
 829
 830                /*
 831                 * The HCA will think the queue has overflowed if we
 832                 * don't tell it we've been processing events.  We
 833                 * create our EQs with MLX4_NUM_SPARE_EQE extra
 834                 * entries, so we must update our consumer index at
 835                 * least that often.
 836                 */
 837                if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
 838                        eq_set_ci(eq, 0);
 839                        set_ci = 0;
 840                }
 841        }
 842
 843        eq_set_ci(eq, 1);
 844
 845        return eqes_found;
 846}
 847
 848static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
 849{
 850        struct mlx4_dev *dev = dev_ptr;
 851        struct mlx4_priv *priv = mlx4_priv(dev);
 852        int work = 0;
 853        int i;
 854
 855        writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
 856
 857        for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
 858                work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
 859
 860        return IRQ_RETVAL(work);
 861}
 862
 863static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
 864{
 865        struct mlx4_eq  *eq  = eq_ptr;
 866        struct mlx4_dev *dev = eq->dev;
 867
 868        mlx4_eq_int(dev, eq);
 869
 870        /* MSI-X vectors always belong to us */
 871        return IRQ_HANDLED;
 872}
 873
 874int mlx4_MAP_EQ_wrapper(struct mlx4_dev *dev, int slave,
 875                        struct mlx4_vhcr *vhcr,
 876                        struct mlx4_cmd_mailbox *inbox,
 877                        struct mlx4_cmd_mailbox *outbox,
 878                        struct mlx4_cmd_info *cmd)
 879{
 880        struct mlx4_priv *priv = mlx4_priv(dev);
 881        struct mlx4_slave_event_eq_info *event_eq =
 882                priv->mfunc.master.slave_state[slave].event_eq;
 883        u32 in_modifier = vhcr->in_modifier;
 884        u32 eqn = in_modifier & 0x3FF;
 885        u64 in_param =  vhcr->in_param;
 886        int err = 0;
 887        int i;
 888
 889        if (slave == dev->caps.function)
 890                err = mlx4_cmd(dev, in_param, (in_modifier & 0x80000000) | eqn,
 891                               0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
 892                               MLX4_CMD_NATIVE);
 893        if (!err)
 894                for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i)
 895                        if (in_param & (1LL << i))
 896                                event_eq[i].eqn = in_modifier >> 31 ? -1 : eqn;
 897
 898        return err;
 899}
 900
 901static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
 902                        int eq_num)
 903{
 904        return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
 905                        0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B,
 906                        MLX4_CMD_WRAPPED);
 907}
 908
 909static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 910                         int eq_num)
 911{
 912        return mlx4_cmd(dev, mailbox->dma, eq_num, 0,
 913                        MLX4_CMD_SW2HW_EQ, MLX4_CMD_TIME_CLASS_A,
 914                        MLX4_CMD_WRAPPED);
 915}
 916
 917static int mlx4_HW2SW_EQ(struct mlx4_dev *dev,  int eq_num)
 918{
 919        return mlx4_cmd(dev, 0, eq_num, 1, MLX4_CMD_HW2SW_EQ,
 920                        MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
 921}
 922
 923static int mlx4_num_eq_uar(struct mlx4_dev *dev)
 924{
 925        /*
 926         * Each UAR holds 4 EQ doorbells.  To figure out how many UARs
 927         * we need to map, take the difference of highest index and
 928         * the lowest index we'll use and add 1.
 929         */
 930        return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs) / 4 -
 931                dev->caps.reserved_eqs / 4 + 1;
 932}
 933
 934static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq)
 935{
 936        struct mlx4_priv *priv = mlx4_priv(dev);
 937        int index;
 938
 939        index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
 940
 941        if (!priv->eq_table.uar_map[index]) {
 942                priv->eq_table.uar_map[index] =
 943                        ioremap(
 944                                pci_resource_start(dev->persist->pdev, 2) +
 945                                ((eq->eqn / 4) << (dev->uar_page_shift)),
 946                                (1 << (dev->uar_page_shift)));
 947                if (!priv->eq_table.uar_map[index]) {
 948                        mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
 949                                 eq->eqn);
 950                        return NULL;
 951                }
 952        }
 953
 954        return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
 955}
 956
 957static void mlx4_unmap_uar(struct mlx4_dev *dev)
 958{
 959        struct mlx4_priv *priv = mlx4_priv(dev);
 960        int i;
 961
 962        for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
 963                if (priv->eq_table.uar_map[i]) {
 964                        iounmap(priv->eq_table.uar_map[i]);
 965                        priv->eq_table.uar_map[i] = NULL;
 966                }
 967}
 968
 969static int mlx4_create_eq(struct mlx4_dev *dev, int nent,
 970                          u8 intr, struct mlx4_eq *eq)
 971{
 972        struct mlx4_priv *priv = mlx4_priv(dev);
 973        struct mlx4_cmd_mailbox *mailbox;
 974        struct mlx4_eq_context *eq_context;
 975        int npages;
 976        u64 *dma_list = NULL;
 977        dma_addr_t t;
 978        u64 mtt_addr;
 979        int err = -ENOMEM;
 980        int i;
 981
 982        eq->dev   = dev;
 983        eq->nent  = roundup_pow_of_two(max(nent, 2));
 984        /* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes, with
 985         * strides of 64B,128B and 256B.
 986         */
 987        npages = PAGE_ALIGN(eq->nent * dev->caps.eqe_size) / PAGE_SIZE;
 988
 989        eq->page_list = kmalloc_array(npages, sizeof(*eq->page_list),
 990                                      GFP_KERNEL);
 991        if (!eq->page_list)
 992                goto err_out;
 993
 994        for (i = 0; i < npages; ++i)
 995                eq->page_list[i].buf = NULL;
 996
 997        dma_list = kmalloc_array(npages, sizeof(*dma_list), GFP_KERNEL);
 998        if (!dma_list)
 999                goto err_out_free;
1000
1001        mailbox = mlx4_alloc_cmd_mailbox(dev);
1002        if (IS_ERR(mailbox))
1003                goto err_out_free;
1004        eq_context = mailbox->buf;
1005
1006        for (i = 0; i < npages; ++i) {
1007                eq->page_list[i].buf = dma_alloc_coherent(&dev->persist->
1008                                                          pdev->dev,
1009                                                          PAGE_SIZE, &t,
1010                                                          GFP_KERNEL);
1011                if (!eq->page_list[i].buf)
1012                        goto err_out_free_pages;
1013
1014                dma_list[i] = t;
1015                eq->page_list[i].map = t;
1016        }
1017
1018        eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
1019        if (eq->eqn == -1)
1020                goto err_out_free_pages;
1021
1022        eq->doorbell = mlx4_get_eq_uar(dev, eq);
1023        if (!eq->doorbell) {
1024                err = -ENOMEM;
1025                goto err_out_free_eq;
1026        }
1027
1028        err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
1029        if (err)
1030                goto err_out_free_eq;
1031
1032        err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
1033        if (err)
1034                goto err_out_free_mtt;
1035
1036        eq_context->flags         = cpu_to_be32(MLX4_EQ_STATUS_OK   |
1037                                                MLX4_EQ_STATE_ARMED);
1038        eq_context->log_eq_size   = ilog2(eq->nent);
1039        eq_context->intr          = intr;
1040        eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
1041
1042        mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
1043        eq_context->mtt_base_addr_h = mtt_addr >> 32;
1044        eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
1045
1046        err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
1047        if (err) {
1048                mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
1049                goto err_out_free_mtt;
1050        }
1051
1052        kfree(dma_list);
1053        mlx4_free_cmd_mailbox(dev, mailbox);
1054
1055        eq->cons_index = 0;
1056
1057        INIT_LIST_HEAD(&eq->tasklet_ctx.list);
1058        INIT_LIST_HEAD(&eq->tasklet_ctx.process_list);
1059        spin_lock_init(&eq->tasklet_ctx.lock);
1060        tasklet_init(&eq->tasklet_ctx.task, mlx4_cq_tasklet_cb,
1061                     (unsigned long)&eq->tasklet_ctx);
1062
1063        return err;
1064
1065err_out_free_mtt:
1066        mlx4_mtt_cleanup(dev, &eq->mtt);
1067
1068err_out_free_eq:
1069        mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR);
1070
1071err_out_free_pages:
1072        for (i = 0; i < npages; ++i)
1073                if (eq->page_list[i].buf)
1074                        dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
1075                                          eq->page_list[i].buf,
1076                                          eq->page_list[i].map);
1077
1078        mlx4_free_cmd_mailbox(dev, mailbox);
1079
1080err_out_free:
1081        kfree(eq->page_list);
1082        kfree(dma_list);
1083
1084err_out:
1085        return err;
1086}
1087
1088static void mlx4_free_eq(struct mlx4_dev *dev,
1089                         struct mlx4_eq *eq)
1090{
1091        struct mlx4_priv *priv = mlx4_priv(dev);
1092        int err;
1093        int i;
1094        /* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes, with
1095         * strides of 64B,128B and 256B
1096         */
1097        int npages = PAGE_ALIGN(dev->caps.eqe_size  * eq->nent) / PAGE_SIZE;
1098
1099        err = mlx4_HW2SW_EQ(dev, eq->eqn);
1100        if (err)
1101                mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
1102
1103        synchronize_irq(eq->irq);
1104        tasklet_disable(&eq->tasklet_ctx.task);
1105
1106        mlx4_mtt_cleanup(dev, &eq->mtt);
1107        for (i = 0; i < npages; ++i)
1108                dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE,
1109                                  eq->page_list[i].buf,
1110                                  eq->page_list[i].map);
1111
1112        kfree(eq->page_list);
1113        mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR);
1114}
1115
1116static void mlx4_free_irqs(struct mlx4_dev *dev)
1117{
1118        struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
1119        int     i;
1120
1121        if (eq_table->have_irq)
1122                free_irq(dev->persist->pdev->irq, dev);
1123
1124        for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
1125                if (eq_table->eq[i].have_irq) {
1126                        free_cpumask_var(eq_table->eq[i].affinity_mask);
1127#if defined(CONFIG_SMP)
1128                        irq_set_affinity_hint(eq_table->eq[i].irq, NULL);
1129#endif
1130                        free_irq(eq_table->eq[i].irq, eq_table->eq + i);
1131                        eq_table->eq[i].have_irq = 0;
1132                }
1133
1134        kfree(eq_table->irq_names);
1135}
1136
1137static int mlx4_map_clr_int(struct mlx4_dev *dev)
1138{
1139        struct mlx4_priv *priv = mlx4_priv(dev);
1140
1141        priv->clr_base = ioremap(pci_resource_start(dev->persist->pdev,
1142                                 priv->fw.clr_int_bar) +
1143                                 priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
1144        if (!priv->clr_base) {
1145                mlx4_err(dev, "Couldn't map interrupt clear register, aborting\n");
1146                return -ENOMEM;
1147        }
1148
1149        return 0;
1150}
1151
1152static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
1153{
1154        struct mlx4_priv *priv = mlx4_priv(dev);
1155
1156        iounmap(priv->clr_base);
1157}
1158
1159int mlx4_alloc_eq_table(struct mlx4_dev *dev)
1160{
1161        struct mlx4_priv *priv = mlx4_priv(dev);
1162
1163        priv->eq_table.eq = kcalloc(dev->caps.num_eqs - dev->caps.reserved_eqs,
1164                                    sizeof(*priv->eq_table.eq), GFP_KERNEL);
1165        if (!priv->eq_table.eq)
1166                return -ENOMEM;
1167
1168        return 0;
1169}
1170
1171void mlx4_free_eq_table(struct mlx4_dev *dev)
1172{
1173        kfree(mlx4_priv(dev)->eq_table.eq);
1174}
1175
1176int mlx4_init_eq_table(struct mlx4_dev *dev)
1177{
1178        struct mlx4_priv *priv = mlx4_priv(dev);
1179        int err;
1180        int i;
1181
1182        priv->eq_table.uar_map = kcalloc(mlx4_num_eq_uar(dev),
1183                                         sizeof(*priv->eq_table.uar_map),
1184                                         GFP_KERNEL);
1185        if (!priv->eq_table.uar_map) {
1186                err = -ENOMEM;
1187                goto err_out_free;
1188        }
1189
1190        err = mlx4_bitmap_init(&priv->eq_table.bitmap,
1191                               roundup_pow_of_two(dev->caps.num_eqs),
1192                               dev->caps.num_eqs - 1,
1193                               dev->caps.reserved_eqs,
1194                               roundup_pow_of_two(dev->caps.num_eqs) -
1195                               dev->caps.num_eqs);
1196        if (err)
1197                goto err_out_free;
1198
1199        for (i = 0; i < mlx4_num_eq_uar(dev); ++i)
1200                priv->eq_table.uar_map[i] = NULL;
1201
1202        if (!mlx4_is_slave(dev)) {
1203                err = mlx4_map_clr_int(dev);
1204                if (err)
1205                        goto err_out_bitmap;
1206
1207                priv->eq_table.clr_mask =
1208                        swab32(1 << (priv->eq_table.inta_pin & 31));
1209                priv->eq_table.clr_int  = priv->clr_base +
1210                        (priv->eq_table.inta_pin < 32 ? 4 : 0);
1211        }
1212
1213        priv->eq_table.irq_names =
1214                kmalloc_array(MLX4_IRQNAME_SIZE,
1215                              (dev->caps.num_comp_vectors + 1),
1216                              GFP_KERNEL);
1217        if (!priv->eq_table.irq_names) {
1218                err = -ENOMEM;
1219                goto err_out_clr_int;
1220        }
1221
1222        for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) {
1223                if (i == MLX4_EQ_ASYNC) {
1224                        err = mlx4_create_eq(dev,
1225                                             MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
1226                                             0, &priv->eq_table.eq[MLX4_EQ_ASYNC]);
1227                } else {
1228                        struct mlx4_eq  *eq = &priv->eq_table.eq[i];
1229#ifdef CONFIG_RFS_ACCEL
1230                        int port = find_first_bit(eq->actv_ports.ports,
1231                                                  dev->caps.num_ports) + 1;
1232
1233                        if (port <= dev->caps.num_ports) {
1234                                struct mlx4_port_info *info =
1235                                        &mlx4_priv(dev)->port[port];
1236
1237                                if (!info->rmap) {
1238                                        info->rmap = alloc_irq_cpu_rmap(
1239                                                mlx4_get_eqs_per_port(dev, port));
1240                                        if (!info->rmap) {
1241                                                mlx4_warn(dev, "Failed to allocate cpu rmap\n");
1242                                                err = -ENOMEM;
1243                                                goto err_out_unmap;
1244                                        }
1245                                }
1246
1247                                err = irq_cpu_rmap_add(
1248                                        info->rmap, eq->irq);
1249                                if (err)
1250                                        mlx4_warn(dev, "Failed adding irq rmap\n");
1251                        }
1252#endif
1253                        err = mlx4_create_eq(dev, dev->quotas.cq +
1254                                             MLX4_NUM_SPARE_EQE,
1255                                             (dev->flags & MLX4_FLAG_MSI_X) ?
1256                                             i + 1 - !!(i > MLX4_EQ_ASYNC) : 0,
1257                                             eq);
1258                }
1259                if (err)
1260                        goto err_out_unmap;
1261        }
1262
1263        if (dev->flags & MLX4_FLAG_MSI_X) {
1264                const char *eq_name;
1265
1266                snprintf(priv->eq_table.irq_names +
1267                         MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE,
1268                         MLX4_IRQNAME_SIZE,
1269                         "mlx4-async@pci:%s",
1270                         pci_name(dev->persist->pdev));
1271                eq_name = priv->eq_table.irq_names +
1272                        MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE;
1273
1274                err = request_irq(priv->eq_table.eq[MLX4_EQ_ASYNC].irq,
1275                                  mlx4_msi_x_interrupt, 0, eq_name,
1276                                  priv->eq_table.eq + MLX4_EQ_ASYNC);
1277                if (err)
1278                        goto err_out_unmap;
1279
1280                priv->eq_table.eq[MLX4_EQ_ASYNC].have_irq = 1;
1281        } else {
1282                snprintf(priv->eq_table.irq_names,
1283                         MLX4_IRQNAME_SIZE,
1284                         DRV_NAME "@pci:%s",
1285                         pci_name(dev->persist->pdev));
1286                err = request_irq(dev->persist->pdev->irq, mlx4_interrupt,
1287                                  IRQF_SHARED, priv->eq_table.irq_names, dev);
1288                if (err)
1289                        goto err_out_unmap;
1290
1291                priv->eq_table.have_irq = 1;
1292        }
1293
1294        err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1295                          priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
1296        if (err)
1297                mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
1298                           priv->eq_table.eq[MLX4_EQ_ASYNC].eqn, err);
1299
1300        /* arm ASYNC eq */
1301        eq_set_ci(&priv->eq_table.eq[MLX4_EQ_ASYNC], 1);
1302
1303        return 0;
1304
1305err_out_unmap:
1306        while (i > 0)
1307                mlx4_free_eq(dev, &priv->eq_table.eq[--i]);
1308#ifdef CONFIG_RFS_ACCEL
1309        for (i = 1; i <= dev->caps.num_ports; i++) {
1310                if (mlx4_priv(dev)->port[i].rmap) {
1311                        free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap);
1312                        mlx4_priv(dev)->port[i].rmap = NULL;
1313                }
1314        }
1315#endif
1316        mlx4_free_irqs(dev);
1317
1318err_out_clr_int:
1319        if (!mlx4_is_slave(dev))
1320                mlx4_unmap_clr_int(dev);
1321
1322err_out_bitmap:
1323        mlx4_unmap_uar(dev);
1324        mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
1325
1326err_out_free:
1327        kfree(priv->eq_table.uar_map);
1328
1329        return err;
1330}
1331
1332void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
1333{
1334        struct mlx4_priv *priv = mlx4_priv(dev);
1335        int i;
1336
1337        mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 1,
1338                    priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
1339
1340#ifdef CONFIG_RFS_ACCEL
1341        for (i = 1; i <= dev->caps.num_ports; i++) {
1342                if (mlx4_priv(dev)->port[i].rmap) {
1343                        free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap);
1344                        mlx4_priv(dev)->port[i].rmap = NULL;
1345                }
1346        }
1347#endif
1348        mlx4_free_irqs(dev);
1349
1350        for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i)
1351                mlx4_free_eq(dev, &priv->eq_table.eq[i]);
1352
1353        if (!mlx4_is_slave(dev))
1354                mlx4_unmap_clr_int(dev);
1355
1356        mlx4_unmap_uar(dev);
1357        mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
1358
1359        kfree(priv->eq_table.uar_map);
1360}
1361
1362/* A test that verifies that we can accept interrupts
1363 * on the vector allocated for asynchronous events
1364 */
1365int mlx4_test_async(struct mlx4_dev *dev)
1366{
1367        return mlx4_NOP(dev);
1368}
1369EXPORT_SYMBOL(mlx4_test_async);
1370
1371/* A test that verifies that we can accept interrupts
1372 * on the given irq vector of the tested port.
1373 * Interrupts are checked using the NOP command.
1374 */
1375int mlx4_test_interrupt(struct mlx4_dev *dev, int vector)
1376{
1377        struct mlx4_priv *priv = mlx4_priv(dev);
1378        int err;
1379
1380        /* Temporary use polling for command completions */
1381        mlx4_cmd_use_polling(dev);
1382
1383        /* Map the new eq to handle all asynchronous events */
1384        err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1385                          priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].eqn);
1386        if (err) {
1387                mlx4_warn(dev, "Failed mapping eq for interrupt test\n");
1388                goto out;
1389        }
1390
1391        /* Go back to using events */
1392        mlx4_cmd_use_events(dev);
1393        err = mlx4_NOP(dev);
1394
1395        /* Return to default */
1396        mlx4_cmd_use_polling(dev);
1397out:
1398        mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
1399                    priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
1400        mlx4_cmd_use_events(dev);
1401
1402        return err;
1403}
1404EXPORT_SYMBOL(mlx4_test_interrupt);
1405
1406bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector)
1407{
1408        struct mlx4_priv *priv = mlx4_priv(dev);
1409
1410        vector = MLX4_CQ_TO_EQ_VECTOR(vector);
1411        if (vector < 0 || (vector >= dev->caps.num_comp_vectors + 1) ||
1412            (vector == MLX4_EQ_ASYNC))
1413                return false;
1414
1415        return test_bit(port - 1, priv->eq_table.eq[vector].actv_ports.ports);
1416}
1417EXPORT_SYMBOL(mlx4_is_eq_vector_valid);
1418
1419u32 mlx4_get_eqs_per_port(struct mlx4_dev *dev, u8 port)
1420{
1421        struct mlx4_priv *priv = mlx4_priv(dev);
1422        unsigned int i;
1423        unsigned int sum = 0;
1424
1425        for (i = 0; i < dev->caps.num_comp_vectors + 1; i++)
1426                sum += !!test_bit(port - 1,
1427                                  priv->eq_table.eq[i].actv_ports.ports);
1428
1429        return sum;
1430}
1431EXPORT_SYMBOL(mlx4_get_eqs_per_port);
1432
1433int mlx4_is_eq_shared(struct mlx4_dev *dev, int vector)
1434{
1435        struct mlx4_priv *priv = mlx4_priv(dev);
1436
1437        vector = MLX4_CQ_TO_EQ_VECTOR(vector);
1438        if (vector <= 0 || (vector >= dev->caps.num_comp_vectors + 1))
1439                return -EINVAL;
1440
1441        return !!(bitmap_weight(priv->eq_table.eq[vector].actv_ports.ports,
1442                                dev->caps.num_ports) > 1);
1443}
1444EXPORT_SYMBOL(mlx4_is_eq_shared);
1445
1446struct cpu_rmap *mlx4_get_cpu_rmap(struct mlx4_dev *dev, int port)
1447{
1448        return mlx4_priv(dev)->port[port].rmap;
1449}
1450EXPORT_SYMBOL(mlx4_get_cpu_rmap);
1451
1452int mlx4_assign_eq(struct mlx4_dev *dev, u8 port, int *vector)
1453{
1454        struct mlx4_priv *priv = mlx4_priv(dev);
1455        int err = 0, i = 0;
1456        u32 min_ref_count_val = (u32)-1;
1457        int requested_vector = MLX4_CQ_TO_EQ_VECTOR(*vector);
1458        int *prequested_vector = NULL;
1459
1460
1461        mutex_lock(&priv->msix_ctl.pool_lock);
1462        if (requested_vector < (dev->caps.num_comp_vectors + 1) &&
1463            (requested_vector >= 0) &&
1464            (requested_vector != MLX4_EQ_ASYNC)) {
1465                if (test_bit(port - 1,
1466                             priv->eq_table.eq[requested_vector].actv_ports.ports)) {
1467                        prequested_vector = &requested_vector;
1468                } else {
1469                        struct mlx4_eq *eq;
1470
1471                        for (i = 1; i < port;
1472                             requested_vector += mlx4_get_eqs_per_port(dev, i++))
1473                                ;
1474
1475                        eq = &priv->eq_table.eq[requested_vector];
1476                        if (requested_vector < dev->caps.num_comp_vectors + 1 &&
1477                            test_bit(port - 1, eq->actv_ports.ports)) {
1478                                prequested_vector = &requested_vector;
1479                        }
1480                }
1481        }
1482
1483        if  (!prequested_vector) {
1484                requested_vector = -1;
1485                for (i = 0; min_ref_count_val && i < dev->caps.num_comp_vectors + 1;
1486                     i++) {
1487                        struct mlx4_eq *eq = &priv->eq_table.eq[i];
1488
1489                        if (min_ref_count_val > eq->ref_count &&
1490                            test_bit(port - 1, eq->actv_ports.ports)) {
1491                                min_ref_count_val = eq->ref_count;
1492                                requested_vector = i;
1493                        }
1494                }
1495
1496                if (requested_vector < 0) {
1497                        err = -ENOSPC;
1498                        goto err_unlock;
1499                }
1500
1501                prequested_vector = &requested_vector;
1502        }
1503
1504        if (!test_bit(*prequested_vector, priv->msix_ctl.pool_bm) &&
1505            dev->flags & MLX4_FLAG_MSI_X) {
1506                set_bit(*prequested_vector, priv->msix_ctl.pool_bm);
1507                snprintf(priv->eq_table.irq_names +
1508                         *prequested_vector * MLX4_IRQNAME_SIZE,
1509                         MLX4_IRQNAME_SIZE, "mlx4-%d@%s",
1510                         *prequested_vector, dev_name(&dev->persist->pdev->dev));
1511
1512                err = request_irq(priv->eq_table.eq[*prequested_vector].irq,
1513                                  mlx4_msi_x_interrupt, 0,
1514                                  &priv->eq_table.irq_names[*prequested_vector << 5],
1515                                  priv->eq_table.eq + *prequested_vector);
1516
1517                if (err) {
1518                        clear_bit(*prequested_vector, priv->msix_ctl.pool_bm);
1519                        *prequested_vector = -1;
1520                } else {
1521#if defined(CONFIG_SMP)
1522                        mlx4_set_eq_affinity_hint(priv, *prequested_vector);
1523#endif
1524                        eq_set_ci(&priv->eq_table.eq[*prequested_vector], 1);
1525                        priv->eq_table.eq[*prequested_vector].have_irq = 1;
1526                }
1527        }
1528
1529        if (!err && *prequested_vector >= 0)
1530                priv->eq_table.eq[*prequested_vector].ref_count++;
1531
1532err_unlock:
1533        mutex_unlock(&priv->msix_ctl.pool_lock);
1534
1535        if (!err && *prequested_vector >= 0)
1536                *vector = MLX4_EQ_TO_CQ_VECTOR(*prequested_vector);
1537        else
1538                *vector = 0;
1539
1540        return err;
1541}
1542EXPORT_SYMBOL(mlx4_assign_eq);
1543
1544int mlx4_eq_get_irq(struct mlx4_dev *dev, int cq_vec)
1545{
1546        struct mlx4_priv *priv = mlx4_priv(dev);
1547
1548        return priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq_vec)].irq;
1549}
1550EXPORT_SYMBOL(mlx4_eq_get_irq);
1551
1552void mlx4_release_eq(struct mlx4_dev *dev, int vec)
1553{
1554        struct mlx4_priv *priv = mlx4_priv(dev);
1555        int eq_vec = MLX4_CQ_TO_EQ_VECTOR(vec);
1556
1557        mutex_lock(&priv->msix_ctl.pool_lock);
1558        priv->eq_table.eq[eq_vec].ref_count--;
1559
1560        /* once we allocated EQ, we don't release it because it might be binded
1561         * to cpu_rmap.
1562         */
1563        mutex_unlock(&priv->msix_ctl.pool_lock);
1564}
1565EXPORT_SYMBOL(mlx4_release_eq);
1566
1567