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 mb(); 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 /* All active slaves need to receive the event */ 155 if (slave == ALL_SLAVES) { 156 for (i = 0; i <= dev->persist->num_vfs; i++) { 157 phys_port = 0; 158 if (eqe->type == MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT && 159 eqe->subtype == MLX4_DEV_PMC_SUBTYPE_PORT_INFO) { 160 phys_port = eqe->event.port_mgmt_change.port; 161 slave_port = mlx4_phys_to_slave_port(dev, i, phys_port); 162 if (slave_port < 0) /* VF doesn't have this port */ 163 continue; 164 eqe->event.port_mgmt_change.port = slave_port; 165 } 166 if (mlx4_GEN_EQE(dev, i, eqe)) 167 mlx4_warn(dev, "Failed to generate event for slave %d\n", 168 i); 169 if (phys_port) 170 eqe->event.port_mgmt_change.port = phys_port; 171 } 172 } else { 173 if (mlx4_GEN_EQE(dev, slave, eqe)) 174 mlx4_warn(dev, "Failed to generate event for slave %d\n", 175 slave); 176 } 177 ++slave_eq->cons; 178 } 179} 180 181 182static void slave_event(struct mlx4_dev *dev, u8 slave, struct mlx4_eqe *eqe) 183{ 184 struct mlx4_priv *priv = mlx4_priv(dev); 185 struct mlx4_slave_event_eq *slave_eq = &priv->mfunc.master.slave_eq; 186 struct mlx4_eqe *s_eqe; 187 unsigned long flags; 188 189 spin_lock_irqsave(&slave_eq->event_lock, flags); 190 s_eqe = &slave_eq->event_eqe[slave_eq->prod & (SLAVE_EVENT_EQ_SIZE - 1)]; 191 if ((!!(s_eqe->owner & 0x80)) ^ 192 (!!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE))) { 193 mlx4_warn(dev, "Master failed to generate an EQE for slave: %d. No free EQE on slave events queue\n", 194 slave); 195 spin_unlock_irqrestore(&slave_eq->event_lock, flags); 196 return; 197 } 198 199 memcpy(s_eqe, eqe, sizeof(struct mlx4_eqe) - 1); 200 s_eqe->slave_id = slave; 201 /* ensure all information is written before setting the ownersip bit */ 202 dma_wmb(); 203 s_eqe->owner = !!(slave_eq->prod & SLAVE_EVENT_EQ_SIZE) ? 0x0 : 0x80; 204 ++slave_eq->prod; 205 206 queue_work(priv->mfunc.master.comm_wq, 207 &priv->mfunc.master.slave_event_work); 208 spin_unlock_irqrestore(&slave_eq->event_lock, flags); 209} 210 211static void mlx4_slave_event(struct mlx4_dev *dev, int slave, 212 struct mlx4_eqe *eqe) 213{ 214 struct mlx4_priv *priv = mlx4_priv(dev); 215 216 if (slave < 0 || slave > dev->persist->num_vfs || 217 slave == dev->caps.function || 218 !priv->mfunc.master.slave_state[slave].active) 219 return; 220 221 slave_event(dev, slave, eqe); 222} 223 224#if defined(CONFIG_SMP) 225static void mlx4_set_eq_affinity_hint(struct mlx4_priv *priv, int vec) 226{ 227 int hint_err; 228 struct mlx4_dev *dev = &priv->dev; 229 struct mlx4_eq *eq = &priv->eq_table.eq[vec]; 230 231 if (!eq->affinity_mask || cpumask_empty(eq->affinity_mask)) 232 return; 233 234 hint_err = irq_set_affinity_hint(eq->irq, eq->affinity_mask); 235 if (hint_err) 236 mlx4_warn(dev, "irq_set_affinity_hint failed, err %d\n", hint_err); 237} 238#endif 239 240int mlx4_gen_pkey_eqe(struct mlx4_dev *dev, int slave, u8 port) 241{ 242 struct mlx4_eqe eqe; 243 244 struct mlx4_priv *priv = mlx4_priv(dev); 245 struct mlx4_slave_state *s_slave = &priv->mfunc.master.slave_state[slave]; 246 247 if (!s_slave->active) 248 return 0; 249 250 memset(&eqe, 0, sizeof eqe); 251 252 eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT; 253 eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE; 254 eqe.event.port_mgmt_change.port = mlx4_phys_to_slave_port(dev, slave, port); 255 256 return mlx4_GEN_EQE(dev, slave, &eqe); 257} 258EXPORT_SYMBOL(mlx4_gen_pkey_eqe); 259 260int mlx4_gen_guid_change_eqe(struct mlx4_dev *dev, int slave, u8 port) 261{ 262 struct mlx4_eqe eqe; 263 264 /*don't send if we don't have the that slave */ 265 if (dev->persist->num_vfs < slave) 266 return 0; 267 memset(&eqe, 0, sizeof eqe); 268 269 eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT; 270 eqe.subtype = MLX4_DEV_PMC_SUBTYPE_GUID_INFO; 271 eqe.event.port_mgmt_change.port = mlx4_phys_to_slave_port(dev, slave, port); 272 273 return mlx4_GEN_EQE(dev, slave, &eqe); 274} 275EXPORT_SYMBOL(mlx4_gen_guid_change_eqe); 276 277int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port, 278 u8 port_subtype_change) 279{ 280 struct mlx4_eqe eqe; 281 u8 slave_port = mlx4_phys_to_slave_port(dev, slave, port); 282 283 /*don't send if we don't have the that slave */ 284 if (dev->persist->num_vfs < slave) 285 return 0; 286 memset(&eqe, 0, sizeof eqe); 287 288 eqe.type = MLX4_EVENT_TYPE_PORT_CHANGE; 289 eqe.subtype = port_subtype_change; 290 eqe.event.port_change.port = cpu_to_be32(slave_port << 28); 291 292 mlx4_dbg(dev, "%s: sending: %d to slave: %d on port: %d\n", __func__, 293 port_subtype_change, slave, port); 294 return mlx4_GEN_EQE(dev, slave, &eqe); 295} 296EXPORT_SYMBOL(mlx4_gen_port_state_change_eqe); 297 298enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port) 299{ 300 struct mlx4_priv *priv = mlx4_priv(dev); 301 struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state; 302 struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave); 303 304 if (slave >= dev->num_slaves || port > dev->caps.num_ports || 305 port <= 0 || !test_bit(port - 1, actv_ports.ports)) { 306 pr_err("%s: Error: asking for slave:%d, port:%d\n", 307 __func__, slave, port); 308 return SLAVE_PORT_DOWN; 309 } 310 return s_state[slave].port_state[port]; 311} 312EXPORT_SYMBOL(mlx4_get_slave_port_state); 313 314static int mlx4_set_slave_port_state(struct mlx4_dev *dev, int slave, u8 port, 315 enum slave_port_state state) 316{ 317 struct mlx4_priv *priv = mlx4_priv(dev); 318 struct mlx4_slave_state *s_state = priv->mfunc.master.slave_state; 319 struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave); 320 321 if (slave >= dev->num_slaves || port > dev->caps.num_ports || 322 port <= 0 || !test_bit(port - 1, actv_ports.ports)) { 323 pr_err("%s: Error: asking for slave:%d, port:%d\n", 324 __func__, slave, port); 325 return -1; 326 } 327 s_state[slave].port_state[port] = state; 328 329 return 0; 330} 331 332static void set_all_slave_state(struct mlx4_dev *dev, u8 port, int event) 333{ 334 int i; 335 enum slave_port_gen_event gen_event; 336 struct mlx4_slaves_pport slaves_pport = mlx4_phys_to_slaves_pport(dev, 337 port); 338 339 for (i = 0; i < dev->persist->num_vfs + 1; i++) 340 if (test_bit(i, slaves_pport.slaves)) 341 set_and_calc_slave_port_state(dev, i, port, 342 event, &gen_event); 343} 344/************************************************************************** 345 The function get as input the new event to that port, 346 and according to the prev state change the slave's port state. 347 The events are: 348 MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN, 349 MLX4_PORT_STATE_DEV_EVENT_PORT_UP 350 MLX4_PORT_STATE_IB_EVENT_GID_VALID 351 MLX4_PORT_STATE_IB_EVENT_GID_INVALID 352***************************************************************************/ 353int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave, 354 u8 port, int event, 355 enum slave_port_gen_event *gen_event) 356{ 357 struct mlx4_priv *priv = mlx4_priv(dev); 358 struct mlx4_slave_state *ctx = NULL; 359 unsigned long flags; 360 int ret = -1; 361 struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave); 362 enum slave_port_state cur_state = 363 mlx4_get_slave_port_state(dev, slave, port); 364 365 *gen_event = SLAVE_PORT_GEN_EVENT_NONE; 366 367 if (slave >= dev->num_slaves || port > dev->caps.num_ports || 368 port <= 0 || !test_bit(port - 1, actv_ports.ports)) { 369 pr_err("%s: Error: asking for slave:%d, port:%d\n", 370 __func__, slave, port); 371 return ret; 372 } 373 374 ctx = &priv->mfunc.master.slave_state[slave]; 375 spin_lock_irqsave(&ctx->lock, flags); 376 377 switch (cur_state) { 378 case SLAVE_PORT_DOWN: 379 if (MLX4_PORT_STATE_DEV_EVENT_PORT_UP == event) 380 mlx4_set_slave_port_state(dev, slave, port, 381 SLAVE_PENDING_UP); 382 break; 383 case SLAVE_PENDING_UP: 384 if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event) 385 mlx4_set_slave_port_state(dev, slave, port, 386 SLAVE_PORT_DOWN); 387 else if (MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID == event) { 388 mlx4_set_slave_port_state(dev, slave, port, 389 SLAVE_PORT_UP); 390 *gen_event = SLAVE_PORT_GEN_EVENT_UP; 391 } 392 break; 393 case SLAVE_PORT_UP: 394 if (MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN == event) { 395 mlx4_set_slave_port_state(dev, slave, port, 396 SLAVE_PORT_DOWN); 397 *gen_event = SLAVE_PORT_GEN_EVENT_DOWN; 398 } else if (MLX4_PORT_STATE_IB_EVENT_GID_INVALID == 399 event) { 400 mlx4_set_slave_port_state(dev, slave, port, 401 SLAVE_PENDING_UP); 402 *gen_event = SLAVE_PORT_GEN_EVENT_DOWN; 403 } 404 break; 405 default: 406 pr_err("%s: BUG!!! UNKNOWN state: slave:%d, port:%d\n", 407 __func__, slave, port); 408 goto out; 409 } 410 ret = mlx4_get_slave_port_state(dev, slave, port); 411 412out: 413 spin_unlock_irqrestore(&ctx->lock, flags); 414 return ret; 415} 416 417EXPORT_SYMBOL(set_and_calc_slave_port_state); 418 419int mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev *dev, u8 port, int attr) 420{ 421 struct mlx4_eqe eqe; 422 423 memset(&eqe, 0, sizeof eqe); 424 425 eqe.type = MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT; 426 eqe.subtype = MLX4_DEV_PMC_SUBTYPE_PORT_INFO; 427 eqe.event.port_mgmt_change.port = port; 428 eqe.event.port_mgmt_change.params.port_info.changed_attr = 429 cpu_to_be32((u32) attr); 430 431 slave_event(dev, ALL_SLAVES, &eqe); 432 return 0; 433} 434EXPORT_SYMBOL(mlx4_gen_slaves_port_mgt_ev); 435 436void mlx4_master_handle_slave_flr(struct work_struct *work) 437{ 438 struct mlx4_mfunc_master_ctx *master = 439 container_of(work, struct mlx4_mfunc_master_ctx, 440 slave_flr_event_work); 441 struct mlx4_mfunc *mfunc = 442 container_of(master, struct mlx4_mfunc, master); 443 struct mlx4_priv *priv = 444 container_of(mfunc, struct mlx4_priv, mfunc); 445 struct mlx4_dev *dev = &priv->dev; 446 struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state; 447 int i; 448 int err; 449 unsigned long flags; 450 451 mlx4_dbg(dev, "mlx4_handle_slave_flr\n"); 452 453 for (i = 0 ; i < dev->num_slaves; i++) { 454 455 if (MLX4_COMM_CMD_FLR == slave_state[i].last_cmd) { 456 mlx4_dbg(dev, "mlx4_handle_slave_flr: clean slave: %d\n", 457 i); 458 /* In case of 'Reset flow' FLR can be generated for 459 * a slave before mlx4_load_one is done. 460 * make sure interface is up before trying to delete 461 * slave resources which weren't allocated yet. 462 */ 463 if (dev->persist->interface_state & 464 MLX4_INTERFACE_STATE_UP) 465 mlx4_delete_all_resources_for_slave(dev, i); 466 /*return the slave to running mode*/ 467 spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags); 468 slave_state[i].last_cmd = MLX4_COMM_CMD_RESET; 469 slave_state[i].is_slave_going_down = 0; 470 spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags); 471 /*notify the FW:*/ 472 err = mlx4_cmd(dev, 0, i, 0, MLX4_CMD_INFORM_FLR_DONE, 473 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 474 if (err) 475 mlx4_warn(dev, "Failed to notify FW on FLR done (slave:%d)\n", 476 i); 477 } 478 } 479} 480 481static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq) 482{ 483 struct mlx4_priv *priv = mlx4_priv(dev); 484 struct mlx4_eqe *eqe; 485 int cqn = -1; 486 int eqes_found = 0; 487 int set_ci = 0; 488 int port; 489 int slave = 0; 490 int ret; 491 u32 flr_slave; 492 u8 update_slave_state; 493 int i; 494 enum slave_port_gen_event gen_event; 495 unsigned long flags; 496 struct mlx4_vport_state *s_info; 497 int eqe_size = dev->caps.eqe_size; 498 499 while ((eqe = next_eqe_sw(eq, dev->caps.eqe_factor, eqe_size))) { 500 /* 501 * Make sure we read EQ entry contents after we've 502 * checked the ownership bit. 503 */ 504 dma_rmb(); 505 506 switch (eqe->type) { 507 case MLX4_EVENT_TYPE_COMP: 508 cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff; 509 mlx4_cq_completion(dev, cqn); 510 break; 511 512 case MLX4_EVENT_TYPE_PATH_MIG: 513 case MLX4_EVENT_TYPE_COMM_EST: 514 case MLX4_EVENT_TYPE_SQ_DRAINED: 515 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE: 516 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR: 517 case MLX4_EVENT_TYPE_PATH_MIG_FAILED: 518 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR: 519 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR: 520 mlx4_dbg(dev, "event %d arrived\n", eqe->type); 521 if (mlx4_is_master(dev)) { 522 /* forward only to slave owning the QP */ 523 ret = mlx4_get_slave_from_resource_id(dev, 524 RES_QP, 525 be32_to_cpu(eqe->event.qp.qpn) 526 & 0xffffff, &slave); 527 if (ret && ret != -ENOENT) { 528 mlx4_dbg(dev, "QP event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n", 529 eqe->type, eqe->subtype, 530 eq->eqn, eq->cons_index, ret); 531 break; 532 } 533 534 if (!ret && slave != dev->caps.function) { 535 mlx4_slave_event(dev, slave, eqe); 536 break; 537 } 538 539 } 540 mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 541 0xffffff, eqe->type); 542 break; 543 544 case MLX4_EVENT_TYPE_SRQ_LIMIT: 545 mlx4_dbg(dev, "%s: MLX4_EVENT_TYPE_SRQ_LIMIT\n", 546 __func__); 547 case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR: 548 if (mlx4_is_master(dev)) { 549 /* forward only to slave owning the SRQ */ 550 ret = mlx4_get_slave_from_resource_id(dev, 551 RES_SRQ, 552 be32_to_cpu(eqe->event.srq.srqn) 553 & 0xffffff, 554 &slave); 555 if (ret && ret != -ENOENT) { 556 mlx4_warn(dev, "SRQ event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n", 557 eqe->type, eqe->subtype, 558 eq->eqn, eq->cons_index, ret); 559 break; 560 } 561 mlx4_warn(dev, "%s: slave:%d, srq_no:0x%x, event: %02x(%02x)\n", 562 __func__, slave, 563 be32_to_cpu(eqe->event.srq.srqn), 564 eqe->type, eqe->subtype); 565 566 if (!ret && slave != dev->caps.function) { 567 mlx4_warn(dev, "%s: sending event %02x(%02x) to slave:%d\n", 568 __func__, eqe->type, 569 eqe->subtype, slave); 570 mlx4_slave_event(dev, slave, eqe); 571 break; 572 } 573 } 574 mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 575 0xffffff, eqe->type); 576 break; 577 578 case MLX4_EVENT_TYPE_CMD: 579 mlx4_cmd_event(dev, 580 be16_to_cpu(eqe->event.cmd.token), 581 eqe->event.cmd.status, 582 be64_to_cpu(eqe->event.cmd.out_param)); 583 break; 584 585 case MLX4_EVENT_TYPE_PORT_CHANGE: { 586 struct mlx4_slaves_pport slaves_port; 587 port = be32_to_cpu(eqe->event.port_change.port) >> 28; 588 slaves_port = mlx4_phys_to_slaves_pport(dev, port); 589 if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) { 590 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN, 591 port); 592 mlx4_priv(dev)->sense.do_sense_port[port] = 1; 593 if (!mlx4_is_master(dev)) 594 break; 595 for (i = 0; i < dev->persist->num_vfs + 1; 596 i++) { 597 if (!test_bit(i, slaves_port.slaves)) 598 continue; 599 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) { 600 if (i == mlx4_master_func_num(dev)) 601 continue; 602 mlx4_dbg(dev, "%s: Sending MLX4_PORT_CHANGE_SUBTYPE_DOWN to slave: %d, port:%d\n", 603 __func__, i, port); 604 s_info = &priv->mfunc.master.vf_oper[i].vport[port].state; 605 if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) { 606 eqe->event.port_change.port = 607 cpu_to_be32( 608 (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF) 609 | (mlx4_phys_to_slave_port(dev, i, port) << 28)); 610 mlx4_slave_event(dev, i, eqe); 611 } 612 } else { /* IB port */ 613 set_and_calc_slave_port_state(dev, i, port, 614 MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN, 615 &gen_event); 616 /*we can be in pending state, then do not send port_down event*/ 617 if (SLAVE_PORT_GEN_EVENT_DOWN == gen_event) { 618 if (i == mlx4_master_func_num(dev)) 619 continue; 620 eqe->event.port_change.port = 621 cpu_to_be32( 622 (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF) 623 | (mlx4_phys_to_slave_port(dev, i, port) << 28)); 624 mlx4_slave_event(dev, i, eqe); 625 } 626 } 627 } 628 } else { 629 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP, port); 630 631 mlx4_priv(dev)->sense.do_sense_port[port] = 0; 632 633 if (!mlx4_is_master(dev)) 634 break; 635 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) 636 for (i = 0; 637 i < dev->persist->num_vfs + 1; 638 i++) { 639 if (!test_bit(i, slaves_port.slaves)) 640 continue; 641 if (i == mlx4_master_func_num(dev)) 642 continue; 643 s_info = &priv->mfunc.master.vf_oper[i].vport[port].state; 644 if (IFLA_VF_LINK_STATE_AUTO == s_info->link_state) { 645 eqe->event.port_change.port = 646 cpu_to_be32( 647 (be32_to_cpu(eqe->event.port_change.port) & 0xFFFFFFF) 648 | (mlx4_phys_to_slave_port(dev, i, port) << 28)); 649 mlx4_slave_event(dev, i, eqe); 650 } 651 } 652 else /* IB port */ 653 /* port-up event will be sent to a slave when the 654 * slave's alias-guid is set. This is done in alias_GUID.c 655 */ 656 set_all_slave_state(dev, port, MLX4_DEV_EVENT_PORT_UP); 657 } 658 break; 659 } 660 661 case MLX4_EVENT_TYPE_CQ_ERROR: 662 mlx4_warn(dev, "CQ %s on CQN %06x\n", 663 eqe->event.cq_err.syndrome == 1 ? 664 "overrun" : "access violation", 665 be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff); 666 if (mlx4_is_master(dev)) { 667 ret = mlx4_get_slave_from_resource_id(dev, 668 RES_CQ, 669 be32_to_cpu(eqe->event.cq_err.cqn) 670 & 0xffffff, &slave); 671 if (ret && ret != -ENOENT) { 672 mlx4_dbg(dev, "CQ event %02x(%02x) on EQ %d at index %u: could not get slave id (%d)\n", 673 eqe->type, eqe->subtype, 674 eq->eqn, eq->cons_index, ret); 675 break; 676 } 677 678 if (!ret && slave != dev->caps.function) { 679 mlx4_slave_event(dev, slave, eqe); 680 break; 681 } 682 } 683 mlx4_cq_event(dev, 684 be32_to_cpu(eqe->event.cq_err.cqn) 685 & 0xffffff, 686 eqe->type); 687 break; 688 689 case MLX4_EVENT_TYPE_EQ_OVERFLOW: 690 mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn); 691 break; 692 693 case MLX4_EVENT_TYPE_OP_REQUIRED: 694 atomic_inc(&priv->opreq_count); 695 /* FW commands can't be executed from interrupt context 696 * working in deferred task 697 */ 698 queue_work(mlx4_wq, &priv->opreq_task); 699 break; 700 701 case MLX4_EVENT_TYPE_COMM_CHANNEL: 702 if (!mlx4_is_master(dev)) { 703 mlx4_warn(dev, "Received comm channel event for non master device\n"); 704 break; 705 } 706 memcpy(&priv->mfunc.master.comm_arm_bit_vector, 707 eqe->event.comm_channel_arm.bit_vec, 708 sizeof eqe->event.comm_channel_arm.bit_vec); 709 queue_work(priv->mfunc.master.comm_wq, 710 &priv->mfunc.master.comm_work); 711 break; 712 713 case MLX4_EVENT_TYPE_FLR_EVENT: 714 flr_slave = be32_to_cpu(eqe->event.flr_event.slave_id); 715 if (!mlx4_is_master(dev)) { 716 mlx4_warn(dev, "Non-master function received FLR event\n"); 717 break; 718 } 719 720 mlx4_dbg(dev, "FLR event for slave: %d\n", flr_slave); 721 722 if (flr_slave >= dev->num_slaves) { 723 mlx4_warn(dev, 724 "Got FLR for unknown function: %d\n", 725 flr_slave); 726 update_slave_state = 0; 727 } else 728 update_slave_state = 1; 729 730 spin_lock_irqsave(&priv->mfunc.master.slave_state_lock, flags); 731 if (update_slave_state) { 732 priv->mfunc.master.slave_state[flr_slave].active = false; 733 priv->mfunc.master.slave_state[flr_slave].last_cmd = MLX4_COMM_CMD_FLR; 734 priv->mfunc.master.slave_state[flr_slave].is_slave_going_down = 1; 735 } 736 spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags); 737 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN, 738 flr_slave); 739 queue_work(priv->mfunc.master.comm_wq, 740 &priv->mfunc.master.slave_flr_event_work); 741 break; 742 743 case MLX4_EVENT_TYPE_FATAL_WARNING: 744 if (eqe->subtype == MLX4_FATAL_WARNING_SUBTYPE_WARMING) { 745 if (mlx4_is_master(dev)) 746 for (i = 0; i < dev->num_slaves; i++) { 747 mlx4_dbg(dev, "%s: Sending MLX4_FATAL_WARNING_SUBTYPE_WARMING to slave: %d\n", 748 __func__, i); 749 if (i == dev->caps.function) 750 continue; 751 mlx4_slave_event(dev, i, eqe); 752 } 753 mlx4_err(dev, "Temperature Threshold was reached! Threshold: %d celsius degrees; Current Temperature: %d\n", 754 be16_to_cpu(eqe->event.warming.warning_threshold), 755 be16_to_cpu(eqe->event.warming.current_temperature)); 756 } else 757 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", 758 eqe->type, eqe->subtype, eq->eqn, 759 eq->cons_index, eqe->owner, eq->nent, 760 eqe->slave_id, 761 !!(eqe->owner & 0x80) ^ 762 !!(eq->cons_index & eq->nent) ? "HW" : "SW"); 763 764 break; 765 766 case MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT: 767 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE, 768 (unsigned long) eqe); 769 break; 770 771 case MLX4_EVENT_TYPE_RECOVERABLE_ERROR_EVENT: 772 switch (eqe->subtype) { 773 case MLX4_RECOVERABLE_ERROR_EVENT_SUBTYPE_BAD_CABLE: 774 mlx4_warn(dev, "Bad cable detected on port %u\n", 775 eqe->event.bad_cable.port); 776 break; 777 case MLX4_RECOVERABLE_ERROR_EVENT_SUBTYPE_UNSUPPORTED_CABLE: 778 mlx4_warn(dev, "Unsupported cable detected\n"); 779 break; 780 default: 781 mlx4_dbg(dev, 782 "Unhandled recoverable error event detected: %02x(%02x) on EQ %d at index %u. owner=%x, nent=0x%x, ownership=%s\n", 783 eqe->type, eqe->subtype, eq->eqn, 784 eq->cons_index, eqe->owner, eq->nent, 785 !!(eqe->owner & 0x80) ^ 786 !!(eq->cons_index & eq->nent) ? "HW" : "SW"); 787 break; 788 } 789 break; 790 791 case MLX4_EVENT_TYPE_EEC_CATAS_ERROR: 792 case MLX4_EVENT_TYPE_ECC_DETECT: 793 default: 794 mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at index %u. owner=%x, nent=0x%x, slave=%x, ownership=%s\n", 795 eqe->type, eqe->subtype, eq->eqn, 796 eq->cons_index, eqe->owner, eq->nent, 797 eqe->slave_id, 798 !!(eqe->owner & 0x80) ^ 799 !!(eq->cons_index & eq->nent) ? "HW" : "SW"); 800 break; 801 }; 802 803 ++eq->cons_index; 804 eqes_found = 1; 805 ++set_ci; 806 807 /* 808 * The HCA will think the queue has overflowed if we 809 * don't tell it we've been processing events. We 810 * create our EQs with MLX4_NUM_SPARE_EQE extra 811 * entries, so we must update our consumer index at 812 * least that often. 813 */ 814 if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) { 815 eq_set_ci(eq, 0); 816 set_ci = 0; 817 } 818 } 819 820 eq_set_ci(eq, 1); 821 822 /* cqn is 24bit wide but is initialized such that its higher bits 823 * are ones too. Thus, if we got any event, cqn's high bits should be off 824 * and we need to schedule the tasklet. 825 */ 826 if (!(cqn & ~0xffffff)) 827 tasklet_schedule(&eq->tasklet_ctx.task); 828 829 return eqes_found; 830} 831 832static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr) 833{ 834 struct mlx4_dev *dev = dev_ptr; 835 struct mlx4_priv *priv = mlx4_priv(dev); 836 int work = 0; 837 int i; 838 839 writel(priv->eq_table.clr_mask, priv->eq_table.clr_int); 840 841 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) 842 work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]); 843 844 return IRQ_RETVAL(work); 845} 846 847static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr) 848{ 849 struct mlx4_eq *eq = eq_ptr; 850 struct mlx4_dev *dev = eq->dev; 851 852 mlx4_eq_int(dev, eq); 853 854 /* MSI-X vectors always belong to us */ 855 return IRQ_HANDLED; 856} 857 858int mlx4_MAP_EQ_wrapper(struct mlx4_dev *dev, int slave, 859 struct mlx4_vhcr *vhcr, 860 struct mlx4_cmd_mailbox *inbox, 861 struct mlx4_cmd_mailbox *outbox, 862 struct mlx4_cmd_info *cmd) 863{ 864 struct mlx4_priv *priv = mlx4_priv(dev); 865 struct mlx4_slave_event_eq_info *event_eq = 866 priv->mfunc.master.slave_state[slave].event_eq; 867 u32 in_modifier = vhcr->in_modifier; 868 u32 eqn = in_modifier & 0x3FF; 869 u64 in_param = vhcr->in_param; 870 int err = 0; 871 int i; 872 873 if (slave == dev->caps.function) 874 err = mlx4_cmd(dev, in_param, (in_modifier & 0x80000000) | eqn, 875 0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B, 876 MLX4_CMD_NATIVE); 877 if (!err) 878 for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i) 879 if (in_param & (1LL << i)) 880 event_eq[i].eqn = in_modifier >> 31 ? -1 : eqn; 881 882 return err; 883} 884 885static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap, 886 int eq_num) 887{ 888 return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num, 889 0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B, 890 MLX4_CMD_WRAPPED); 891} 892 893static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 894 int eq_num) 895{ 896 return mlx4_cmd(dev, mailbox->dma, eq_num, 0, 897 MLX4_CMD_SW2HW_EQ, MLX4_CMD_TIME_CLASS_A, 898 MLX4_CMD_WRAPPED); 899} 900 901static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, int eq_num) 902{ 903 return mlx4_cmd(dev, 0, eq_num, 1, MLX4_CMD_HW2SW_EQ, 904 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 905} 906 907static int mlx4_num_eq_uar(struct mlx4_dev *dev) 908{ 909 /* 910 * Each UAR holds 4 EQ doorbells. To figure out how many UARs 911 * we need to map, take the difference of highest index and 912 * the lowest index we'll use and add 1. 913 */ 914 return (dev->caps.num_comp_vectors + 1 + dev->caps.reserved_eqs) / 4 - 915 dev->caps.reserved_eqs / 4 + 1; 916} 917 918static void __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev, struct mlx4_eq *eq) 919{ 920 struct mlx4_priv *priv = mlx4_priv(dev); 921 int index; 922 923 index = eq->eqn / 4 - dev->caps.reserved_eqs / 4; 924 925 if (!priv->eq_table.uar_map[index]) { 926 priv->eq_table.uar_map[index] = 927 ioremap(pci_resource_start(dev->persist->pdev, 2) + 928 ((eq->eqn / 4) << PAGE_SHIFT), 929 PAGE_SIZE); 930 if (!priv->eq_table.uar_map[index]) { 931 mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n", 932 eq->eqn); 933 return NULL; 934 } 935 } 936 937 return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4); 938} 939 940static void mlx4_unmap_uar(struct mlx4_dev *dev) 941{ 942 struct mlx4_priv *priv = mlx4_priv(dev); 943 int i; 944 945 for (i = 0; i < mlx4_num_eq_uar(dev); ++i) 946 if (priv->eq_table.uar_map[i]) { 947 iounmap(priv->eq_table.uar_map[i]); 948 priv->eq_table.uar_map[i] = NULL; 949 } 950} 951 952static int mlx4_create_eq(struct mlx4_dev *dev, int nent, 953 u8 intr, struct mlx4_eq *eq) 954{ 955 struct mlx4_priv *priv = mlx4_priv(dev); 956 struct mlx4_cmd_mailbox *mailbox; 957 struct mlx4_eq_context *eq_context; 958 int npages; 959 u64 *dma_list = NULL; 960 dma_addr_t t; 961 u64 mtt_addr; 962 int err = -ENOMEM; 963 int i; 964 965 eq->dev = dev; 966 eq->nent = roundup_pow_of_two(max(nent, 2)); 967 /* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes, with 968 * strides of 64B,128B and 256B. 969 */ 970 npages = PAGE_ALIGN(eq->nent * dev->caps.eqe_size) / PAGE_SIZE; 971 972 eq->page_list = kmalloc(npages * sizeof *eq->page_list, 973 GFP_KERNEL); 974 if (!eq->page_list) 975 goto err_out; 976 977 for (i = 0; i < npages; ++i) 978 eq->page_list[i].buf = NULL; 979 980 dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL); 981 if (!dma_list) 982 goto err_out_free; 983 984 mailbox = mlx4_alloc_cmd_mailbox(dev); 985 if (IS_ERR(mailbox)) 986 goto err_out_free; 987 eq_context = mailbox->buf; 988 989 for (i = 0; i < npages; ++i) { 990 eq->page_list[i].buf = dma_alloc_coherent(&dev->persist-> 991 pdev->dev, 992 PAGE_SIZE, &t, 993 GFP_KERNEL); 994 if (!eq->page_list[i].buf) 995 goto err_out_free_pages; 996 997 dma_list[i] = t; 998 eq->page_list[i].map = t; 999 1000 memset(eq->page_list[i].buf, 0, PAGE_SIZE); 1001 } 1002 1003 eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap); 1004 if (eq->eqn == -1) 1005 goto err_out_free_pages; 1006 1007 eq->doorbell = mlx4_get_eq_uar(dev, eq); 1008 if (!eq->doorbell) { 1009 err = -ENOMEM; 1010 goto err_out_free_eq; 1011 } 1012 1013 err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt); 1014 if (err) 1015 goto err_out_free_eq; 1016 1017 err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list); 1018 if (err) 1019 goto err_out_free_mtt; 1020 1021 eq_context->flags = cpu_to_be32(MLX4_EQ_STATUS_OK | 1022 MLX4_EQ_STATE_ARMED); 1023 eq_context->log_eq_size = ilog2(eq->nent); 1024 eq_context->intr = intr; 1025 eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT; 1026 1027 mtt_addr = mlx4_mtt_addr(dev, &eq->mtt); 1028 eq_context->mtt_base_addr_h = mtt_addr >> 32; 1029 eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); 1030 1031 err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn); 1032 if (err) { 1033 mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err); 1034 goto err_out_free_mtt; 1035 } 1036 1037 kfree(dma_list); 1038 mlx4_free_cmd_mailbox(dev, mailbox); 1039 1040 eq->cons_index = 0; 1041 1042 INIT_LIST_HEAD(&eq->tasklet_ctx.list); 1043 INIT_LIST_HEAD(&eq->tasklet_ctx.process_list); 1044 spin_lock_init(&eq->tasklet_ctx.lock); 1045 tasklet_init(&eq->tasklet_ctx.task, mlx4_cq_tasklet_cb, 1046 (unsigned long)&eq->tasklet_ctx); 1047 1048 return err; 1049 1050err_out_free_mtt: 1051 mlx4_mtt_cleanup(dev, &eq->mtt); 1052 1053err_out_free_eq: 1054 mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR); 1055 1056err_out_free_pages: 1057 for (i = 0; i < npages; ++i) 1058 if (eq->page_list[i].buf) 1059 dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE, 1060 eq->page_list[i].buf, 1061 eq->page_list[i].map); 1062 1063 mlx4_free_cmd_mailbox(dev, mailbox); 1064 1065err_out_free: 1066 kfree(eq->page_list); 1067 kfree(dma_list); 1068 1069err_out: 1070 return err; 1071} 1072 1073static void mlx4_free_eq(struct mlx4_dev *dev, 1074 struct mlx4_eq *eq) 1075{ 1076 struct mlx4_priv *priv = mlx4_priv(dev); 1077 int err; 1078 int i; 1079 /* CX3 is capable of extending the CQE/EQE from 32 to 64 bytes, with 1080 * strides of 64B,128B and 256B 1081 */ 1082 int npages = PAGE_ALIGN(dev->caps.eqe_size * eq->nent) / PAGE_SIZE; 1083 1084 err = mlx4_HW2SW_EQ(dev, eq->eqn); 1085 if (err) 1086 mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err); 1087 1088 synchronize_irq(eq->irq); 1089 tasklet_disable(&eq->tasklet_ctx.task); 1090 1091 mlx4_mtt_cleanup(dev, &eq->mtt); 1092 for (i = 0; i < npages; ++i) 1093 dma_free_coherent(&dev->persist->pdev->dev, PAGE_SIZE, 1094 eq->page_list[i].buf, 1095 eq->page_list[i].map); 1096 1097 kfree(eq->page_list); 1098 mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn, MLX4_USE_RR); 1099} 1100 1101static void mlx4_free_irqs(struct mlx4_dev *dev) 1102{ 1103 struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table; 1104 int i; 1105 1106 if (eq_table->have_irq) 1107 free_irq(dev->persist->pdev->irq, dev); 1108 1109 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) 1110 if (eq_table->eq[i].have_irq) { 1111 free_cpumask_var(eq_table->eq[i].affinity_mask); 1112#if defined(CONFIG_SMP) 1113 irq_set_affinity_hint(eq_table->eq[i].irq, NULL); 1114#endif 1115 free_irq(eq_table->eq[i].irq, eq_table->eq + i); 1116 eq_table->eq[i].have_irq = 0; 1117 } 1118 1119 kfree(eq_table->irq_names); 1120} 1121 1122static int mlx4_map_clr_int(struct mlx4_dev *dev) 1123{ 1124 struct mlx4_priv *priv = mlx4_priv(dev); 1125 1126 priv->clr_base = ioremap(pci_resource_start(dev->persist->pdev, 1127 priv->fw.clr_int_bar) + 1128 priv->fw.clr_int_base, MLX4_CLR_INT_SIZE); 1129 if (!priv->clr_base) { 1130 mlx4_err(dev, "Couldn't map interrupt clear register, aborting\n"); 1131 return -ENOMEM; 1132 } 1133 1134 return 0; 1135} 1136 1137static void mlx4_unmap_clr_int(struct mlx4_dev *dev) 1138{ 1139 struct mlx4_priv *priv = mlx4_priv(dev); 1140 1141 iounmap(priv->clr_base); 1142} 1143 1144int mlx4_alloc_eq_table(struct mlx4_dev *dev) 1145{ 1146 struct mlx4_priv *priv = mlx4_priv(dev); 1147 1148 priv->eq_table.eq = kcalloc(dev->caps.num_eqs - dev->caps.reserved_eqs, 1149 sizeof *priv->eq_table.eq, GFP_KERNEL); 1150 if (!priv->eq_table.eq) 1151 return -ENOMEM; 1152 1153 return 0; 1154} 1155 1156void mlx4_free_eq_table(struct mlx4_dev *dev) 1157{ 1158 kfree(mlx4_priv(dev)->eq_table.eq); 1159} 1160 1161int mlx4_init_eq_table(struct mlx4_dev *dev) 1162{ 1163 struct mlx4_priv *priv = mlx4_priv(dev); 1164 int err; 1165 int i; 1166 1167 priv->eq_table.uar_map = kcalloc(mlx4_num_eq_uar(dev), 1168 sizeof *priv->eq_table.uar_map, 1169 GFP_KERNEL); 1170 if (!priv->eq_table.uar_map) { 1171 err = -ENOMEM; 1172 goto err_out_free; 1173 } 1174 1175 err = mlx4_bitmap_init(&priv->eq_table.bitmap, 1176 roundup_pow_of_two(dev->caps.num_eqs), 1177 dev->caps.num_eqs - 1, 1178 dev->caps.reserved_eqs, 1179 roundup_pow_of_two(dev->caps.num_eqs) - 1180 dev->caps.num_eqs); 1181 if (err) 1182 goto err_out_free; 1183 1184 for (i = 0; i < mlx4_num_eq_uar(dev); ++i) 1185 priv->eq_table.uar_map[i] = NULL; 1186 1187 if (!mlx4_is_slave(dev)) { 1188 err = mlx4_map_clr_int(dev); 1189 if (err) 1190 goto err_out_bitmap; 1191 1192 priv->eq_table.clr_mask = 1193 swab32(1 << (priv->eq_table.inta_pin & 31)); 1194 priv->eq_table.clr_int = priv->clr_base + 1195 (priv->eq_table.inta_pin < 32 ? 4 : 0); 1196 } 1197 1198 priv->eq_table.irq_names = 1199 kmalloc(MLX4_IRQNAME_SIZE * (dev->caps.num_comp_vectors + 1), 1200 GFP_KERNEL); 1201 if (!priv->eq_table.irq_names) { 1202 err = -ENOMEM; 1203 goto err_out_clr_int; 1204 } 1205 1206 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) { 1207 if (i == MLX4_EQ_ASYNC) { 1208 err = mlx4_create_eq(dev, 1209 MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE, 1210 0, &priv->eq_table.eq[MLX4_EQ_ASYNC]); 1211 } else { 1212 struct mlx4_eq *eq = &priv->eq_table.eq[i]; 1213#ifdef CONFIG_RFS_ACCEL 1214 int port = find_first_bit(eq->actv_ports.ports, 1215 dev->caps.num_ports) + 1; 1216 1217 if (port <= dev->caps.num_ports) { 1218 struct mlx4_port_info *info = 1219 &mlx4_priv(dev)->port[port]; 1220 1221 if (!info->rmap) { 1222 info->rmap = alloc_irq_cpu_rmap( 1223 mlx4_get_eqs_per_port(dev, port)); 1224 if (!info->rmap) { 1225 mlx4_warn(dev, "Failed to allocate cpu rmap\n"); 1226 err = -ENOMEM; 1227 goto err_out_unmap; 1228 } 1229 } 1230 1231 err = irq_cpu_rmap_add( 1232 info->rmap, eq->irq); 1233 if (err) 1234 mlx4_warn(dev, "Failed adding irq rmap\n"); 1235 } 1236#endif 1237 err = mlx4_create_eq(dev, dev->caps.num_cqs - 1238 dev->caps.reserved_cqs + 1239 MLX4_NUM_SPARE_EQE, 1240 (dev->flags & MLX4_FLAG_MSI_X) ? 1241 i + 1 - !!(i > MLX4_EQ_ASYNC) : 0, 1242 eq); 1243 } 1244 if (err) 1245 goto err_out_unmap; 1246 } 1247 1248 if (dev->flags & MLX4_FLAG_MSI_X) { 1249 const char *eq_name; 1250 1251 snprintf(priv->eq_table.irq_names + 1252 MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE, 1253 MLX4_IRQNAME_SIZE, 1254 "mlx4-async@pci:%s", 1255 pci_name(dev->persist->pdev)); 1256 eq_name = priv->eq_table.irq_names + 1257 MLX4_EQ_ASYNC * MLX4_IRQNAME_SIZE; 1258 1259 err = request_irq(priv->eq_table.eq[MLX4_EQ_ASYNC].irq, 1260 mlx4_msi_x_interrupt, 0, eq_name, 1261 priv->eq_table.eq + MLX4_EQ_ASYNC); 1262 if (err) 1263 goto err_out_unmap; 1264 1265 priv->eq_table.eq[MLX4_EQ_ASYNC].have_irq = 1; 1266 } else { 1267 snprintf(priv->eq_table.irq_names, 1268 MLX4_IRQNAME_SIZE, 1269 DRV_NAME "@pci:%s", 1270 pci_name(dev->persist->pdev)); 1271 err = request_irq(dev->persist->pdev->irq, mlx4_interrupt, 1272 IRQF_SHARED, priv->eq_table.irq_names, dev); 1273 if (err) 1274 goto err_out_unmap; 1275 1276 priv->eq_table.have_irq = 1; 1277 } 1278 1279 err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0, 1280 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn); 1281 if (err) 1282 mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n", 1283 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn, err); 1284 1285 /* arm ASYNC eq */ 1286 eq_set_ci(&priv->eq_table.eq[MLX4_EQ_ASYNC], 1); 1287 1288 return 0; 1289 1290err_out_unmap: 1291 while (i >= 0) 1292 mlx4_free_eq(dev, &priv->eq_table.eq[i--]); 1293#ifdef CONFIG_RFS_ACCEL 1294 for (i = 1; i <= dev->caps.num_ports; i++) { 1295 if (mlx4_priv(dev)->port[i].rmap) { 1296 free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap); 1297 mlx4_priv(dev)->port[i].rmap = NULL; 1298 } 1299 } 1300#endif 1301 mlx4_free_irqs(dev); 1302 1303err_out_clr_int: 1304 if (!mlx4_is_slave(dev)) 1305 mlx4_unmap_clr_int(dev); 1306 1307err_out_bitmap: 1308 mlx4_unmap_uar(dev); 1309 mlx4_bitmap_cleanup(&priv->eq_table.bitmap); 1310 1311err_out_free: 1312 kfree(priv->eq_table.uar_map); 1313 1314 return err; 1315} 1316 1317void mlx4_cleanup_eq_table(struct mlx4_dev *dev) 1318{ 1319 struct mlx4_priv *priv = mlx4_priv(dev); 1320 int i; 1321 1322 mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 1, 1323 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn); 1324 1325#ifdef CONFIG_RFS_ACCEL 1326 for (i = 1; i <= dev->caps.num_ports; i++) { 1327 if (mlx4_priv(dev)->port[i].rmap) { 1328 free_irq_cpu_rmap(mlx4_priv(dev)->port[i].rmap); 1329 mlx4_priv(dev)->port[i].rmap = NULL; 1330 } 1331 } 1332#endif 1333 mlx4_free_irqs(dev); 1334 1335 for (i = 0; i < dev->caps.num_comp_vectors + 1; ++i) 1336 mlx4_free_eq(dev, &priv->eq_table.eq[i]); 1337 1338 if (!mlx4_is_slave(dev)) 1339 mlx4_unmap_clr_int(dev); 1340 1341 mlx4_unmap_uar(dev); 1342 mlx4_bitmap_cleanup(&priv->eq_table.bitmap); 1343 1344 kfree(priv->eq_table.uar_map); 1345} 1346 1347/* A test that verifies that we can accept interrupts on all 1348 * the irq vectors of the device. 1349 * Interrupts are checked using the NOP command. 1350 */ 1351int mlx4_test_interrupts(struct mlx4_dev *dev) 1352{ 1353 struct mlx4_priv *priv = mlx4_priv(dev); 1354 int i; 1355 int err; 1356 1357 err = mlx4_NOP(dev); 1358 /* When not in MSI_X, there is only one irq to check */ 1359 if (!(dev->flags & MLX4_FLAG_MSI_X) || mlx4_is_slave(dev)) 1360 return err; 1361 1362 /* A loop over all completion vectors, for each vector we will check 1363 * whether it works by mapping command completions to that vector 1364 * and performing a NOP command 1365 */ 1366 for(i = 0; !err && (i < dev->caps.num_comp_vectors); ++i) { 1367 /* Make sure request_irq was called */ 1368 if (!priv->eq_table.eq[i].have_irq) 1369 continue; 1370 1371 /* Temporary use polling for command completions */ 1372 mlx4_cmd_use_polling(dev); 1373 1374 /* Map the new eq to handle all asynchronous events */ 1375 err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0, 1376 priv->eq_table.eq[i].eqn); 1377 if (err) { 1378 mlx4_warn(dev, "Failed mapping eq for interrupt test\n"); 1379 mlx4_cmd_use_events(dev); 1380 break; 1381 } 1382 1383 /* Go back to using events */ 1384 mlx4_cmd_use_events(dev); 1385 err = mlx4_NOP(dev); 1386 } 1387 1388 /* Return to default */ 1389 mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0, 1390 priv->eq_table.eq[MLX4_EQ_ASYNC].eqn); 1391 return err; 1392} 1393EXPORT_SYMBOL(mlx4_test_interrupts); 1394 1395bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector) 1396{ 1397 struct mlx4_priv *priv = mlx4_priv(dev); 1398 1399 vector = MLX4_CQ_TO_EQ_VECTOR(vector); 1400 if (vector < 0 || (vector >= dev->caps.num_comp_vectors + 1) || 1401 (vector == MLX4_EQ_ASYNC)) 1402 return false; 1403 1404 return test_bit(port - 1, priv->eq_table.eq[vector].actv_ports.ports); 1405} 1406EXPORT_SYMBOL(mlx4_is_eq_vector_valid); 1407 1408u32 mlx4_get_eqs_per_port(struct mlx4_dev *dev, u8 port) 1409{ 1410 struct mlx4_priv *priv = mlx4_priv(dev); 1411 unsigned int i; 1412 unsigned int sum = 0; 1413 1414 for (i = 0; i < dev->caps.num_comp_vectors + 1; i++) 1415 sum += !!test_bit(port - 1, 1416 priv->eq_table.eq[i].actv_ports.ports); 1417 1418 return sum; 1419} 1420EXPORT_SYMBOL(mlx4_get_eqs_per_port); 1421 1422int mlx4_is_eq_shared(struct mlx4_dev *dev, int vector) 1423{ 1424 struct mlx4_priv *priv = mlx4_priv(dev); 1425 1426 vector = MLX4_CQ_TO_EQ_VECTOR(vector); 1427 if (vector <= 0 || (vector >= dev->caps.num_comp_vectors + 1)) 1428 return -EINVAL; 1429 1430 return !!(bitmap_weight(priv->eq_table.eq[vector].actv_ports.ports, 1431 dev->caps.num_ports) > 1); 1432} 1433EXPORT_SYMBOL(mlx4_is_eq_shared); 1434 1435struct cpu_rmap *mlx4_get_cpu_rmap(struct mlx4_dev *dev, int port) 1436{ 1437 return mlx4_priv(dev)->port[port].rmap; 1438} 1439EXPORT_SYMBOL(mlx4_get_cpu_rmap); 1440 1441int mlx4_assign_eq(struct mlx4_dev *dev, u8 port, int *vector) 1442{ 1443 struct mlx4_priv *priv = mlx4_priv(dev); 1444 int err = 0, i = 0; 1445 u32 min_ref_count_val = (u32)-1; 1446 int requested_vector = MLX4_CQ_TO_EQ_VECTOR(*vector); 1447 int *prequested_vector = NULL; 1448 1449 1450 mutex_lock(&priv->msix_ctl.pool_lock); 1451 if (requested_vector < (dev->caps.num_comp_vectors + 1) && 1452 (requested_vector >= 0) && 1453 (requested_vector != MLX4_EQ_ASYNC)) { 1454 if (test_bit(port - 1, 1455 priv->eq_table.eq[requested_vector].actv_ports.ports)) { 1456 prequested_vector = &requested_vector; 1457 } else { 1458 struct mlx4_eq *eq; 1459 1460 for (i = 1; i < port; 1461 requested_vector += mlx4_get_eqs_per_port(dev, i++)) 1462 ; 1463 1464 eq = &priv->eq_table.eq[requested_vector]; 1465 if (requested_vector < dev->caps.num_comp_vectors + 1 && 1466 test_bit(port - 1, eq->actv_ports.ports)) { 1467 prequested_vector = &requested_vector; 1468 } 1469 } 1470 } 1471 1472 if (!prequested_vector) { 1473 requested_vector = -1; 1474 for (i = 0; min_ref_count_val && i < dev->caps.num_comp_vectors + 1; 1475 i++) { 1476 struct mlx4_eq *eq = &priv->eq_table.eq[i]; 1477 1478 if (min_ref_count_val > eq->ref_count && 1479 test_bit(port - 1, eq->actv_ports.ports)) { 1480 min_ref_count_val = eq->ref_count; 1481 requested_vector = i; 1482 } 1483 } 1484 1485 if (requested_vector < 0) { 1486 err = -ENOSPC; 1487 goto err_unlock; 1488 } 1489 1490 prequested_vector = &requested_vector; 1491 } 1492 1493 if (!test_bit(*prequested_vector, priv->msix_ctl.pool_bm) && 1494 dev->flags & MLX4_FLAG_MSI_X) { 1495 set_bit(*prequested_vector, priv->msix_ctl.pool_bm); 1496 snprintf(priv->eq_table.irq_names + 1497 *prequested_vector * MLX4_IRQNAME_SIZE, 1498 MLX4_IRQNAME_SIZE, "mlx4-%d@%s", 1499 *prequested_vector, dev_name(&dev->persist->pdev->dev)); 1500 1501 err = request_irq(priv->eq_table.eq[*prequested_vector].irq, 1502 mlx4_msi_x_interrupt, 0, 1503 &priv->eq_table.irq_names[*prequested_vector << 5], 1504 priv->eq_table.eq + *prequested_vector); 1505 1506 if (err) { 1507 clear_bit(*prequested_vector, priv->msix_ctl.pool_bm); 1508 *prequested_vector = -1; 1509 } else { 1510#if defined(CONFIG_SMP) 1511 mlx4_set_eq_affinity_hint(priv, *prequested_vector); 1512#endif 1513 eq_set_ci(&priv->eq_table.eq[*prequested_vector], 1); 1514 priv->eq_table.eq[*prequested_vector].have_irq = 1; 1515 } 1516 } 1517 1518 if (!err && *prequested_vector >= 0) 1519 priv->eq_table.eq[*prequested_vector].ref_count++; 1520 1521err_unlock: 1522 mutex_unlock(&priv->msix_ctl.pool_lock); 1523 1524 if (!err && *prequested_vector >= 0) 1525 *vector = MLX4_EQ_TO_CQ_VECTOR(*prequested_vector); 1526 else 1527 *vector = 0; 1528 1529 return err; 1530} 1531EXPORT_SYMBOL(mlx4_assign_eq); 1532 1533int mlx4_eq_get_irq(struct mlx4_dev *dev, int cq_vec) 1534{ 1535 struct mlx4_priv *priv = mlx4_priv(dev); 1536 1537 return priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(cq_vec)].irq; 1538} 1539EXPORT_SYMBOL(mlx4_eq_get_irq); 1540 1541void mlx4_release_eq(struct mlx4_dev *dev, int vec) 1542{ 1543 struct mlx4_priv *priv = mlx4_priv(dev); 1544 int eq_vec = MLX4_CQ_TO_EQ_VECTOR(vec); 1545 1546 mutex_lock(&priv->msix_ctl.pool_lock); 1547 priv->eq_table.eq[eq_vec].ref_count--; 1548 1549 /* once we allocated EQ, we don't release it because it might be binded 1550 * to cpu_rmap. 1551 */ 1552 mutex_unlock(&priv->msix_ctl.pool_lock); 1553} 1554EXPORT_SYMBOL(mlx4_release_eq); 1555 1556