1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2017 - 2019 Pensando Systems, Inc */ 3 4 #include <linux/kernel.h> 5 #include <linux/types.h> 6 #include <linux/errno.h> 7 #include <linux/io.h> 8 #include <linux/slab.h> 9 #include <linux/etherdevice.h> 10 #include "ionic.h" 11 #include "ionic_dev.h" 12 #include "ionic_lif.h" 13 14 static void ionic_watchdog_cb(struct timer_list *t) 15 { 16 struct ionic *ionic = from_timer(ionic, t, watchdog_timer); 17 struct ionic_lif *lif = ionic->lif; 18 struct ionic_deferred_work *work; 19 int hb; 20 21 mod_timer(&ionic->watchdog_timer, 22 round_jiffies(jiffies + ionic->watchdog_period)); 23 24 if (!lif) 25 return; 26 27 hb = ionic_heartbeat_check(ionic); 28 dev_dbg(ionic->dev, "%s: hb %d running %d UP %d\n", 29 __func__, hb, netif_running(lif->netdev), 30 test_bit(IONIC_LIF_F_UP, lif->state)); 31 32 if (hb >= 0 && 33 !test_bit(IONIC_LIF_F_FW_RESET, lif->state)) 34 ionic_link_status_check_request(lif, CAN_NOT_SLEEP); 35 36 if (test_bit(IONIC_LIF_F_FILTER_SYNC_NEEDED, lif->state) && 37 !test_bit(IONIC_LIF_F_FW_RESET, lif->state)) { 38 work = kzalloc(sizeof(*work), GFP_ATOMIC); 39 if (!work) { 40 netdev_err(lif->netdev, "rxmode change dropped\n"); 41 return; 42 } 43 44 work->type = IONIC_DW_TYPE_RX_MODE; 45 netdev_dbg(lif->netdev, "deferred: rx_mode\n"); 46 ionic_lif_deferred_enqueue(&lif->deferred, work); 47 } 48 } 49 50 static void ionic_watchdog_init(struct ionic *ionic) 51 { 52 struct ionic_dev *idev = &ionic->idev; 53 54 timer_setup(&ionic->watchdog_timer, ionic_watchdog_cb, 0); 55 ionic->watchdog_period = IONIC_WATCHDOG_SECS * HZ; 56 57 /* set times to ensure the first check will proceed */ 58 atomic_long_set(&idev->last_check_time, jiffies - 2 * HZ); 59 idev->last_hb_time = jiffies - 2 * ionic->watchdog_period; 60 /* init as ready, so no transition if the first check succeeds */ 61 idev->last_fw_hb = 0; 62 idev->fw_hb_ready = true; 63 idev->fw_status_ready = true; 64 idev->fw_generation = IONIC_FW_STS_F_GENERATION & 65 ioread8(&idev->dev_info_regs->fw_status); 66 } 67 68 void ionic_init_devinfo(struct ionic *ionic) 69 { 70 struct ionic_dev *idev = &ionic->idev; 71 72 idev->dev_info.asic_type = ioread8(&idev->dev_info_regs->asic_type); 73 idev->dev_info.asic_rev = ioread8(&idev->dev_info_regs->asic_rev); 74 75 memcpy_fromio(idev->dev_info.fw_version, 76 idev->dev_info_regs->fw_version, 77 IONIC_DEVINFO_FWVERS_BUFLEN); 78 79 memcpy_fromio(idev->dev_info.serial_num, 80 idev->dev_info_regs->serial_num, 81 IONIC_DEVINFO_SERIAL_BUFLEN); 82 83 idev->dev_info.fw_version[IONIC_DEVINFO_FWVERS_BUFLEN] = 0; 84 idev->dev_info.serial_num[IONIC_DEVINFO_SERIAL_BUFLEN] = 0; 85 86 dev_dbg(ionic->dev, "fw_version %s\n", idev->dev_info.fw_version); 87 } 88 89 int ionic_dev_setup(struct ionic *ionic) 90 { 91 struct ionic_dev_bar *bar = ionic->bars; 92 unsigned int num_bars = ionic->num_bars; 93 struct ionic_dev *idev = &ionic->idev; 94 struct device *dev = ionic->dev; 95 int size; 96 u32 sig; 97 98 /* BAR0: dev_cmd and interrupts */ 99 if (num_bars < 1) { 100 dev_err(dev, "No bars found, aborting\n"); 101 return -EFAULT; 102 } 103 104 if (bar->len < IONIC_BAR0_SIZE) { 105 dev_err(dev, "Resource bar size %lu too small, aborting\n", 106 bar->len); 107 return -EFAULT; 108 } 109 110 idev->dev_info_regs = bar->vaddr + IONIC_BAR0_DEV_INFO_REGS_OFFSET; 111 idev->dev_cmd_regs = bar->vaddr + IONIC_BAR0_DEV_CMD_REGS_OFFSET; 112 idev->intr_status = bar->vaddr + IONIC_BAR0_INTR_STATUS_OFFSET; 113 idev->intr_ctrl = bar->vaddr + IONIC_BAR0_INTR_CTRL_OFFSET; 114 115 idev->hwstamp_regs = &idev->dev_info_regs->hwstamp; 116 117 sig = ioread32(&idev->dev_info_regs->signature); 118 if (sig != IONIC_DEV_INFO_SIGNATURE) { 119 dev_err(dev, "Incompatible firmware signature %x", sig); 120 return -EFAULT; 121 } 122 123 ionic_init_devinfo(ionic); 124 125 /* BAR1: doorbells */ 126 bar++; 127 if (num_bars < 2) { 128 dev_err(dev, "Doorbell bar missing, aborting\n"); 129 return -EFAULT; 130 } 131 132 ionic_watchdog_init(ionic); 133 134 idev->db_pages = bar->vaddr; 135 idev->phy_db_pages = bar->bus_addr; 136 137 /* BAR2: optional controller memory mapping */ 138 bar++; 139 mutex_init(&idev->cmb_inuse_lock); 140 if (num_bars < 3 || !ionic->bars[IONIC_PCI_BAR_CMB].len) { 141 idev->cmb_inuse = NULL; 142 return 0; 143 } 144 145 idev->phy_cmb_pages = bar->bus_addr; 146 idev->cmb_npages = bar->len / PAGE_SIZE; 147 size = BITS_TO_LONGS(idev->cmb_npages) * sizeof(long); 148 idev->cmb_inuse = kzalloc(size, GFP_KERNEL); 149 if (!idev->cmb_inuse) 150 dev_warn(dev, "No memory for CMB, disabling\n"); 151 152 return 0; 153 } 154 155 void ionic_dev_teardown(struct ionic *ionic) 156 { 157 struct ionic_dev *idev = &ionic->idev; 158 159 kfree(idev->cmb_inuse); 160 idev->cmb_inuse = NULL; 161 idev->phy_cmb_pages = 0; 162 idev->cmb_npages = 0; 163 164 mutex_destroy(&idev->cmb_inuse_lock); 165 } 166 167 /* Devcmd Interface */ 168 static bool __ionic_is_fw_running(struct ionic_dev *idev, u8 *status_ptr) 169 { 170 u8 fw_status; 171 172 if (!idev->dev_info_regs) { 173 if (status_ptr) 174 *status_ptr = 0xff; 175 return false; 176 } 177 178 fw_status = ioread8(&idev->dev_info_regs->fw_status); 179 if (status_ptr) 180 *status_ptr = fw_status; 181 182 /* firmware is useful only if the running bit is set and 183 * fw_status != 0xff (bad PCI read) 184 */ 185 return (fw_status != 0xff) && (fw_status & IONIC_FW_STS_F_RUNNING); 186 } 187 188 bool ionic_is_fw_running(struct ionic_dev *idev) 189 { 190 return __ionic_is_fw_running(idev, NULL); 191 } 192 193 int ionic_heartbeat_check(struct ionic *ionic) 194 { 195 unsigned long check_time, last_check_time; 196 struct ionic_dev *idev = &ionic->idev; 197 struct ionic_lif *lif = ionic->lif; 198 bool fw_status_ready = true; 199 bool fw_hb_ready; 200 u8 fw_generation; 201 u8 fw_status; 202 u32 fw_hb; 203 204 /* wait a least one second before testing again */ 205 check_time = jiffies; 206 last_check_time = atomic_long_read(&idev->last_check_time); 207 do_check_time: 208 if (time_before(check_time, last_check_time + HZ)) 209 return 0; 210 if (!atomic_long_try_cmpxchg_relaxed(&idev->last_check_time, 211 &last_check_time, check_time)) { 212 /* if called concurrently, only the first should proceed. */ 213 dev_dbg(ionic->dev, "%s: do_check_time again\n", __func__); 214 goto do_check_time; 215 } 216 217 /* If fw_status is not ready don't bother with the generation */ 218 if (!__ionic_is_fw_running(idev, &fw_status)) { 219 fw_status_ready = false; 220 } else { 221 fw_generation = fw_status & IONIC_FW_STS_F_GENERATION; 222 if (idev->fw_generation != fw_generation) { 223 dev_info(ionic->dev, "FW generation 0x%02x -> 0x%02x\n", 224 idev->fw_generation, fw_generation); 225 226 idev->fw_generation = fw_generation; 227 228 /* If the generation changed, the fw status is not 229 * ready so we need to trigger a fw-down cycle. After 230 * the down, the next watchdog will see the fw is up 231 * and the generation value stable, so will trigger 232 * the fw-up activity. 233 * 234 * If we had already moved to FW_RESET from a RESET event, 235 * it is possible that we never saw the fw_status go to 0, 236 * so we fake the current idev->fw_status_ready here to 237 * force the transition and get FW up again. 238 */ 239 if (test_bit(IONIC_LIF_F_FW_RESET, lif->state)) 240 idev->fw_status_ready = false; /* go to running */ 241 else 242 fw_status_ready = false; /* go to down */ 243 } 244 } 245 246 dev_dbg(ionic->dev, "fw_status 0x%02x ready %d idev->ready %d last_hb 0x%x state 0x%02lx\n", 247 fw_status, fw_status_ready, idev->fw_status_ready, 248 idev->last_fw_hb, lif->state[0]); 249 250 /* is this a transition? */ 251 if (fw_status_ready != idev->fw_status_ready && 252 !test_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) { 253 bool trigger = false; 254 255 idev->fw_status_ready = fw_status_ready; 256 257 if (!fw_status_ready && 258 !test_bit(IONIC_LIF_F_FW_RESET, lif->state) && 259 !test_and_set_bit(IONIC_LIF_F_FW_STOPPING, lif->state)) { 260 dev_info(ionic->dev, "FW stopped 0x%02x\n", fw_status); 261 trigger = true; 262 263 } else if (fw_status_ready && 264 test_bit(IONIC_LIF_F_FW_RESET, lif->state)) { 265 dev_info(ionic->dev, "FW running 0x%02x\n", fw_status); 266 trigger = true; 267 } 268 269 if (trigger) { 270 struct ionic_deferred_work *work; 271 272 work = kzalloc(sizeof(*work), GFP_ATOMIC); 273 if (work) { 274 work->type = IONIC_DW_TYPE_LIF_RESET; 275 work->fw_status = fw_status_ready; 276 ionic_lif_deferred_enqueue(&lif->deferred, work); 277 } 278 } 279 } 280 281 if (!idev->fw_status_ready) 282 return -ENXIO; 283 284 /* Because of some variability in the actual FW heartbeat, we 285 * wait longer than the DEVCMD_TIMEOUT before checking again. 286 */ 287 last_check_time = idev->last_hb_time; 288 if (time_before(check_time, last_check_time + DEVCMD_TIMEOUT * 2 * HZ)) 289 return 0; 290 291 fw_hb = ioread32(&idev->dev_info_regs->fw_heartbeat); 292 fw_hb_ready = fw_hb != idev->last_fw_hb; 293 294 /* early FW version had no heartbeat, so fake it */ 295 if (!fw_hb_ready && !fw_hb) 296 fw_hb_ready = true; 297 298 dev_dbg(ionic->dev, "%s: fw_hb %u last_fw_hb %u ready %u\n", 299 __func__, fw_hb, idev->last_fw_hb, fw_hb_ready); 300 301 idev->last_fw_hb = fw_hb; 302 303 /* log a transition */ 304 if (fw_hb_ready != idev->fw_hb_ready) { 305 idev->fw_hb_ready = fw_hb_ready; 306 if (!fw_hb_ready) 307 dev_info(ionic->dev, "FW heartbeat stalled at %d\n", fw_hb); 308 else 309 dev_info(ionic->dev, "FW heartbeat restored at %d\n", fw_hb); 310 } 311 312 if (!fw_hb_ready) 313 return -ENXIO; 314 315 idev->last_hb_time = check_time; 316 317 return 0; 318 } 319 320 u8 ionic_dev_cmd_status(struct ionic_dev *idev) 321 { 322 return ioread8(&idev->dev_cmd_regs->comp.comp.status); 323 } 324 325 bool ionic_dev_cmd_done(struct ionic_dev *idev) 326 { 327 return ioread32(&idev->dev_cmd_regs->done) & IONIC_DEV_CMD_DONE; 328 } 329 330 void ionic_dev_cmd_comp(struct ionic_dev *idev, union ionic_dev_cmd_comp *comp) 331 { 332 memcpy_fromio(comp, &idev->dev_cmd_regs->comp, sizeof(*comp)); 333 } 334 335 void ionic_dev_cmd_go(struct ionic_dev *idev, union ionic_dev_cmd *cmd) 336 { 337 idev->opcode = cmd->cmd.opcode; 338 memcpy_toio(&idev->dev_cmd_regs->cmd, cmd, sizeof(*cmd)); 339 iowrite32(0, &idev->dev_cmd_regs->done); 340 iowrite32(1, &idev->dev_cmd_regs->doorbell); 341 } 342 343 /* Device commands */ 344 void ionic_dev_cmd_identify(struct ionic_dev *idev, u8 ver) 345 { 346 union ionic_dev_cmd cmd = { 347 .identify.opcode = IONIC_CMD_IDENTIFY, 348 .identify.ver = ver, 349 }; 350 351 ionic_dev_cmd_go(idev, &cmd); 352 } 353 354 void ionic_dev_cmd_init(struct ionic_dev *idev) 355 { 356 union ionic_dev_cmd cmd = { 357 .init.opcode = IONIC_CMD_INIT, 358 .init.type = 0, 359 }; 360 361 ionic_dev_cmd_go(idev, &cmd); 362 } 363 364 void ionic_dev_cmd_reset(struct ionic_dev *idev) 365 { 366 union ionic_dev_cmd cmd = { 367 .reset.opcode = IONIC_CMD_RESET, 368 }; 369 370 ionic_dev_cmd_go(idev, &cmd); 371 } 372 373 /* Port commands */ 374 void ionic_dev_cmd_port_identify(struct ionic_dev *idev) 375 { 376 union ionic_dev_cmd cmd = { 377 .port_init.opcode = IONIC_CMD_PORT_IDENTIFY, 378 .port_init.index = 0, 379 }; 380 381 ionic_dev_cmd_go(idev, &cmd); 382 } 383 384 void ionic_dev_cmd_port_init(struct ionic_dev *idev) 385 { 386 union ionic_dev_cmd cmd = { 387 .port_init.opcode = IONIC_CMD_PORT_INIT, 388 .port_init.index = 0, 389 .port_init.info_pa = cpu_to_le64(idev->port_info_pa), 390 }; 391 392 ionic_dev_cmd_go(idev, &cmd); 393 } 394 395 void ionic_dev_cmd_port_reset(struct ionic_dev *idev) 396 { 397 union ionic_dev_cmd cmd = { 398 .port_reset.opcode = IONIC_CMD_PORT_RESET, 399 .port_reset.index = 0, 400 }; 401 402 ionic_dev_cmd_go(idev, &cmd); 403 } 404 405 void ionic_dev_cmd_port_state(struct ionic_dev *idev, u8 state) 406 { 407 union ionic_dev_cmd cmd = { 408 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR, 409 .port_setattr.index = 0, 410 .port_setattr.attr = IONIC_PORT_ATTR_STATE, 411 .port_setattr.state = state, 412 }; 413 414 ionic_dev_cmd_go(idev, &cmd); 415 } 416 417 void ionic_dev_cmd_port_speed(struct ionic_dev *idev, u32 speed) 418 { 419 union ionic_dev_cmd cmd = { 420 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR, 421 .port_setattr.index = 0, 422 .port_setattr.attr = IONIC_PORT_ATTR_SPEED, 423 .port_setattr.speed = cpu_to_le32(speed), 424 }; 425 426 ionic_dev_cmd_go(idev, &cmd); 427 } 428 429 void ionic_dev_cmd_port_autoneg(struct ionic_dev *idev, u8 an_enable) 430 { 431 union ionic_dev_cmd cmd = { 432 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR, 433 .port_setattr.index = 0, 434 .port_setattr.attr = IONIC_PORT_ATTR_AUTONEG, 435 .port_setattr.an_enable = an_enable, 436 }; 437 438 ionic_dev_cmd_go(idev, &cmd); 439 } 440 441 void ionic_dev_cmd_port_fec(struct ionic_dev *idev, u8 fec_type) 442 { 443 union ionic_dev_cmd cmd = { 444 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR, 445 .port_setattr.index = 0, 446 .port_setattr.attr = IONIC_PORT_ATTR_FEC, 447 .port_setattr.fec_type = fec_type, 448 }; 449 450 ionic_dev_cmd_go(idev, &cmd); 451 } 452 453 void ionic_dev_cmd_port_pause(struct ionic_dev *idev, u8 pause_type) 454 { 455 union ionic_dev_cmd cmd = { 456 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR, 457 .port_setattr.index = 0, 458 .port_setattr.attr = IONIC_PORT_ATTR_PAUSE, 459 .port_setattr.pause_type = pause_type, 460 }; 461 462 ionic_dev_cmd_go(idev, &cmd); 463 } 464 465 /* VF commands */ 466 int ionic_set_vf_config(struct ionic *ionic, int vf, 467 struct ionic_vf_setattr_cmd *vfc) 468 { 469 union ionic_dev_cmd cmd = { 470 .vf_setattr.opcode = IONIC_CMD_VF_SETATTR, 471 .vf_setattr.attr = vfc->attr, 472 .vf_setattr.vf_index = cpu_to_le16(vf), 473 }; 474 int err; 475 476 memcpy(cmd.vf_setattr.pad, vfc->pad, sizeof(vfc->pad)); 477 478 mutex_lock(&ionic->dev_cmd_lock); 479 ionic_dev_cmd_go(&ionic->idev, &cmd); 480 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 481 mutex_unlock(&ionic->dev_cmd_lock); 482 483 return err; 484 } 485 486 void ionic_vf_start(struct ionic *ionic) 487 { 488 union ionic_dev_cmd cmd = { 489 .vf_ctrl.opcode = IONIC_CMD_VF_CTRL, 490 .vf_ctrl.ctrl_opcode = IONIC_VF_CTRL_START_ALL, 491 }; 492 493 if (!(ionic->ident.dev.capabilities & cpu_to_le64(IONIC_DEV_CAP_VF_CTRL))) 494 return; 495 496 ionic_dev_cmd_go(&ionic->idev, &cmd); 497 ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 498 } 499 500 /* LIF commands */ 501 void ionic_dev_cmd_queue_identify(struct ionic_dev *idev, 502 u16 lif_type, u8 qtype, u8 qver) 503 { 504 union ionic_dev_cmd cmd = { 505 .q_identify.opcode = IONIC_CMD_Q_IDENTIFY, 506 .q_identify.lif_type = cpu_to_le16(lif_type), 507 .q_identify.type = qtype, 508 .q_identify.ver = qver, 509 }; 510 511 ionic_dev_cmd_go(idev, &cmd); 512 } 513 514 void ionic_dev_cmd_lif_identify(struct ionic_dev *idev, u8 type, u8 ver) 515 { 516 union ionic_dev_cmd cmd = { 517 .lif_identify.opcode = IONIC_CMD_LIF_IDENTIFY, 518 .lif_identify.type = type, 519 .lif_identify.ver = ver, 520 }; 521 522 ionic_dev_cmd_go(idev, &cmd); 523 } 524 525 void ionic_dev_cmd_lif_init(struct ionic_dev *idev, u16 lif_index, 526 dma_addr_t info_pa) 527 { 528 union ionic_dev_cmd cmd = { 529 .lif_init.opcode = IONIC_CMD_LIF_INIT, 530 .lif_init.index = cpu_to_le16(lif_index), 531 .lif_init.info_pa = cpu_to_le64(info_pa), 532 }; 533 534 ionic_dev_cmd_go(idev, &cmd); 535 } 536 537 void ionic_dev_cmd_lif_reset(struct ionic_dev *idev, u16 lif_index) 538 { 539 union ionic_dev_cmd cmd = { 540 .lif_init.opcode = IONIC_CMD_LIF_RESET, 541 .lif_init.index = cpu_to_le16(lif_index), 542 }; 543 544 ionic_dev_cmd_go(idev, &cmd); 545 } 546 547 void ionic_dev_cmd_adminq_init(struct ionic_dev *idev, struct ionic_qcq *qcq, 548 u16 lif_index, u16 intr_index) 549 { 550 struct ionic_queue *q = &qcq->q; 551 struct ionic_cq *cq = &qcq->cq; 552 553 union ionic_dev_cmd cmd = { 554 .q_init.opcode = IONIC_CMD_Q_INIT, 555 .q_init.lif_index = cpu_to_le16(lif_index), 556 .q_init.type = q->type, 557 .q_init.ver = qcq->q.lif->qtype_info[q->type].version, 558 .q_init.index = cpu_to_le32(q->index), 559 .q_init.flags = cpu_to_le16(IONIC_QINIT_F_IRQ | 560 IONIC_QINIT_F_ENA), 561 .q_init.pid = cpu_to_le16(q->pid), 562 .q_init.intr_index = cpu_to_le16(intr_index), 563 .q_init.ring_size = ilog2(q->num_descs), 564 .q_init.ring_base = cpu_to_le64(q->base_pa), 565 .q_init.cq_ring_base = cpu_to_le64(cq->base_pa), 566 }; 567 568 ionic_dev_cmd_go(idev, &cmd); 569 } 570 571 int ionic_db_page_num(struct ionic_lif *lif, int pid) 572 { 573 return (lif->hw_index * lif->dbid_count) + pid; 574 } 575 576 int ionic_get_cmb(struct ionic_lif *lif, u32 *pgid, phys_addr_t *pgaddr, int order) 577 { 578 struct ionic_dev *idev = &lif->ionic->idev; 579 int ret; 580 581 mutex_lock(&idev->cmb_inuse_lock); 582 ret = bitmap_find_free_region(idev->cmb_inuse, idev->cmb_npages, order); 583 mutex_unlock(&idev->cmb_inuse_lock); 584 585 if (ret < 0) 586 return ret; 587 588 *pgid = ret; 589 *pgaddr = idev->phy_cmb_pages + ret * PAGE_SIZE; 590 591 return 0; 592 } 593 594 void ionic_put_cmb(struct ionic_lif *lif, u32 pgid, int order) 595 { 596 struct ionic_dev *idev = &lif->ionic->idev; 597 598 mutex_lock(&idev->cmb_inuse_lock); 599 bitmap_release_region(idev->cmb_inuse, pgid, order); 600 mutex_unlock(&idev->cmb_inuse_lock); 601 } 602 603 int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq, 604 struct ionic_intr_info *intr, 605 unsigned int num_descs, size_t desc_size) 606 { 607 unsigned int ring_size; 608 609 if (desc_size == 0 || !is_power_of_2(num_descs)) 610 return -EINVAL; 611 612 ring_size = ilog2(num_descs); 613 if (ring_size < 2 || ring_size > 16) 614 return -EINVAL; 615 616 cq->lif = lif; 617 cq->bound_intr = intr; 618 cq->num_descs = num_descs; 619 cq->desc_size = desc_size; 620 cq->tail_idx = 0; 621 cq->done_color = 1; 622 623 return 0; 624 } 625 626 void ionic_cq_map(struct ionic_cq *cq, void *base, dma_addr_t base_pa) 627 { 628 struct ionic_cq_info *cur; 629 unsigned int i; 630 631 cq->base = base; 632 cq->base_pa = base_pa; 633 634 for (i = 0, cur = cq->info; i < cq->num_descs; i++, cur++) 635 cur->cq_desc = base + (i * cq->desc_size); 636 } 637 638 void ionic_cq_bind(struct ionic_cq *cq, struct ionic_queue *q) 639 { 640 cq->bound_q = q; 641 } 642 643 unsigned int ionic_cq_service(struct ionic_cq *cq, unsigned int work_to_do, 644 ionic_cq_cb cb, ionic_cq_done_cb done_cb, 645 void *done_arg) 646 { 647 struct ionic_cq_info *cq_info; 648 unsigned int work_done = 0; 649 650 if (work_to_do == 0) 651 return 0; 652 653 cq_info = &cq->info[cq->tail_idx]; 654 while (cb(cq, cq_info)) { 655 if (cq->tail_idx == cq->num_descs - 1) 656 cq->done_color = !cq->done_color; 657 cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1); 658 cq_info = &cq->info[cq->tail_idx]; 659 660 if (++work_done >= work_to_do) 661 break; 662 } 663 664 if (work_done && done_cb) 665 done_cb(done_arg); 666 667 return work_done; 668 } 669 670 int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev, 671 struct ionic_queue *q, unsigned int index, const char *name, 672 unsigned int num_descs, size_t desc_size, 673 size_t sg_desc_size, unsigned int pid) 674 { 675 unsigned int ring_size; 676 677 if (desc_size == 0 || !is_power_of_2(num_descs)) 678 return -EINVAL; 679 680 ring_size = ilog2(num_descs); 681 if (ring_size < 2 || ring_size > 16) 682 return -EINVAL; 683 684 q->lif = lif; 685 q->idev = idev; 686 q->index = index; 687 q->num_descs = num_descs; 688 q->desc_size = desc_size; 689 q->sg_desc_size = sg_desc_size; 690 q->tail_idx = 0; 691 q->head_idx = 0; 692 q->pid = pid; 693 694 snprintf(q->name, sizeof(q->name), "L%d-%s%u", lif->index, name, index); 695 696 return 0; 697 } 698 699 void ionic_q_map(struct ionic_queue *q, void *base, dma_addr_t base_pa) 700 { 701 struct ionic_desc_info *cur; 702 unsigned int i; 703 704 q->base = base; 705 q->base_pa = base_pa; 706 707 for (i = 0, cur = q->info; i < q->num_descs; i++, cur++) 708 cur->desc = base + (i * q->desc_size); 709 } 710 711 void ionic_q_cmb_map(struct ionic_queue *q, void __iomem *base, dma_addr_t base_pa) 712 { 713 struct ionic_desc_info *cur; 714 unsigned int i; 715 716 q->cmb_base = base; 717 q->cmb_base_pa = base_pa; 718 719 for (i = 0, cur = q->info; i < q->num_descs; i++, cur++) 720 cur->cmb_desc = base + (i * q->desc_size); 721 } 722 723 void ionic_q_sg_map(struct ionic_queue *q, void *base, dma_addr_t base_pa) 724 { 725 struct ionic_desc_info *cur; 726 unsigned int i; 727 728 q->sg_base = base; 729 q->sg_base_pa = base_pa; 730 731 for (i = 0, cur = q->info; i < q->num_descs; i++, cur++) 732 cur->sg_desc = base + (i * q->sg_desc_size); 733 } 734 735 void ionic_q_post(struct ionic_queue *q, bool ring_doorbell, ionic_desc_cb cb, 736 void *cb_arg) 737 { 738 struct ionic_desc_info *desc_info; 739 struct ionic_lif *lif = q->lif; 740 struct device *dev = q->dev; 741 742 desc_info = &q->info[q->head_idx]; 743 desc_info->cb = cb; 744 desc_info->cb_arg = cb_arg; 745 746 q->head_idx = (q->head_idx + 1) & (q->num_descs - 1); 747 748 dev_dbg(dev, "lif=%d qname=%s qid=%d qtype=%d p_index=%d ringdb=%d\n", 749 q->lif->index, q->name, q->hw_type, q->hw_index, 750 q->head_idx, ring_doorbell); 751 752 if (ring_doorbell) { 753 ionic_dbell_ring(lif->kern_dbpage, q->hw_type, 754 q->dbval | q->head_idx); 755 756 q->dbell_jiffies = jiffies; 757 758 if (q_to_qcq(q)->napi_qcq) 759 mod_timer(&q_to_qcq(q)->napi_qcq->napi_deadline, 760 jiffies + IONIC_NAPI_DEADLINE); 761 } 762 } 763 764 static bool ionic_q_is_posted(struct ionic_queue *q, unsigned int pos) 765 { 766 unsigned int mask, tail, head; 767 768 mask = q->num_descs - 1; 769 tail = q->tail_idx; 770 head = q->head_idx; 771 772 return ((pos - tail) & mask) < ((head - tail) & mask); 773 } 774 775 void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info, 776 unsigned int stop_index) 777 { 778 struct ionic_desc_info *desc_info; 779 ionic_desc_cb cb; 780 void *cb_arg; 781 u16 index; 782 783 /* check for empty queue */ 784 if (q->tail_idx == q->head_idx) 785 return; 786 787 /* stop index must be for a descriptor that is not yet completed */ 788 if (unlikely(!ionic_q_is_posted(q, stop_index))) 789 dev_err(q->dev, 790 "ionic stop is not posted %s stop %u tail %u head %u\n", 791 q->name, stop_index, q->tail_idx, q->head_idx); 792 793 do { 794 desc_info = &q->info[q->tail_idx]; 795 index = q->tail_idx; 796 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1); 797 798 cb = desc_info->cb; 799 cb_arg = desc_info->cb_arg; 800 801 desc_info->cb = NULL; 802 desc_info->cb_arg = NULL; 803 804 if (cb) 805 cb(q, desc_info, cq_info, cb_arg); 806 } while (index != stop_index); 807 } 808