drivers/net/ionic/ionic_dev.c

   1 /* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
   2  * Copyright(c) 2018-2019 Pensando Systems, Inc. All rights reserved.
   3  */
   4
   5 #include <stdbool.h>
   6
   7 #include <rte_malloc.h>
   8
   9 #include "ionic_dev.h"
  10 #include "ionic_lif.h"
  11 #include "ionic.h"
  12
  13 int
  14 ionic_dev_setup(struct ionic_adapter *adapter)
  15 {
  16         struct ionic_dev_bar *bar = adapter->bars;
  17         unsigned int num_bars = adapter->num_bars;
  18         struct ionic_dev *idev = &adapter->idev;
  19         uint32_t sig;
  20         u_char *bar0_base;
  21         unsigned int i;
  22
  23         /* BAR0: dev_cmd and interrupts */
  24         if (num_bars < 1) {
  25                 IONIC_PRINT(ERR, "No bars found, aborting");
  26                 return -EFAULT;
  27         }
  28
  29         if (bar->len < IONIC_BAR0_SIZE) {
  30                 IONIC_PRINT(ERR,
  31                         "Resource bar size %lu too small, aborting",
  32                         bar->len);
  33                 return -EFAULT;
  34         }
  35
  36         bar0_base = bar->vaddr;
  37         idev->dev_info = (union ionic_dev_info_regs *)
  38                 &bar0_base[IONIC_BAR0_DEV_INFO_REGS_OFFSET];
  39         idev->dev_cmd = (union ionic_dev_cmd_regs *)
  40                 &bar0_base[IONIC_BAR0_DEV_CMD_REGS_OFFSET];
  41         idev->intr_status = (struct ionic_intr_status *)
  42                 &bar0_base[IONIC_BAR0_INTR_STATUS_OFFSET];
  43         idev->intr_ctrl = (struct ionic_intr *)
  44                 &bar0_base[IONIC_BAR0_INTR_CTRL_OFFSET];
  45
  46         sig = ioread32(&idev->dev_info->signature);
  47         if (sig != IONIC_DEV_INFO_SIGNATURE) {
  48                 IONIC_PRINT(ERR, "Incompatible firmware signature %" PRIx32 "",
  49                         sig);
  50                 return -EFAULT;
  51         }
  52
  53         for (i = 0; i < IONIC_DEVINFO_FWVERS_BUFLEN; i++)
  54                 adapter->fw_version[i] =
  55                         ioread8(&idev->dev_info->fw_version[i]);
  56         adapter->fw_version[IONIC_DEVINFO_FWVERS_BUFLEN - 1] = '\0';
  57
  58         IONIC_PRINT(DEBUG, "Firmware version: %s", adapter->fw_version);
  59
  60         /* BAR1: doorbells */
  61         bar++;
  62         if (num_bars < 2) {
  63                 IONIC_PRINT(ERR, "Doorbell bar missing, aborting");
  64                 return -EFAULT;
  65         }
  66
  67         idev->db_pages = bar->vaddr;
  68
  69         return 0;
  70 }
  71
  72 /* Devcmd Interface */
  73
  74 uint8_t
  75 ionic_dev_cmd_status(struct ionic_dev *idev)
  76 {
  77         return ioread8(&idev->dev_cmd->comp.comp.status);
  78 }
  79
  80 bool
  81 ionic_dev_cmd_done(struct ionic_dev *idev)
  82 {
  83         return ioread32(&idev->dev_cmd->done) & IONIC_DEV_CMD_DONE;
  84 }
  85
  86 void
  87 ionic_dev_cmd_comp(struct ionic_dev *idev, void *mem)
  88 {
  89         union ionic_dev_cmd_comp *comp = mem;
  90         unsigned int i;
  91         uint32_t comp_size = sizeof(comp->words) /
  92                 sizeof(comp->words[0]);
  93
  94         for (i = 0; i < comp_size; i++)
  95                 comp->words[i] = ioread32(&idev->dev_cmd->comp.words[i]);
  96 }
  97
  98 void
  99 ionic_dev_cmd_go(struct ionic_dev *idev, union ionic_dev_cmd *cmd)
 100 {
 101         unsigned int i;
 102         uint32_t cmd_size = sizeof(cmd->words) /
 103                 sizeof(cmd->words[0]);
 104
 105         IONIC_PRINT(DEBUG, "Sending %s (%d) via dev_cmd",
 106                     ionic_opcode_to_str(cmd->cmd.opcode), cmd->cmd.opcode);
 107
 108         for (i = 0; i < cmd_size; i++)
 109                 iowrite32(cmd->words[i], &idev->dev_cmd->cmd.words[i]);
 110
 111         iowrite32(0, &idev->dev_cmd->done);
 112         iowrite32(1, &idev->dev_cmd->doorbell);
 113 }
 114
 115 /* Device commands */
 116
 117 void
 118 ionic_dev_cmd_identify(struct ionic_dev *idev, uint8_t ver)
 119 {
 120         union ionic_dev_cmd cmd = {
 121                 .identify.opcode = IONIC_CMD_IDENTIFY,
 122                 .identify.ver = ver,
 123         };
 124
 125         ionic_dev_cmd_go(idev, &cmd);
 126 }
 127
 128 void
 129 ionic_dev_cmd_init(struct ionic_dev *idev)
 130 {
 131         union ionic_dev_cmd cmd = {
 132                 .init.opcode = IONIC_CMD_INIT,
 133                 .init.type = 0,
 134         };
 135
 136         ionic_dev_cmd_go(idev, &cmd);
 137 }
 138
 139 void
 140 ionic_dev_cmd_reset(struct ionic_dev *idev)
 141 {
 142         union ionic_dev_cmd cmd = {
 143                 .reset.opcode = IONIC_CMD_RESET,
 144         };
 145
 146         ionic_dev_cmd_go(idev, &cmd);
 147 }
 148
 149 /* Port commands */
 150
 151 void
 152 ionic_dev_cmd_port_identify(struct ionic_dev *idev)
 153 {
 154         union ionic_dev_cmd cmd = {
 155                 .port_init.opcode = IONIC_CMD_PORT_IDENTIFY,
 156                 .port_init.index = 0,
 157         };
 158
 159         ionic_dev_cmd_go(idev, &cmd);
 160 }
 161
 162 void
 163 ionic_dev_cmd_port_init(struct ionic_dev *idev)
 164 {
 165         union ionic_dev_cmd cmd = {
 166                 .port_init.opcode = IONIC_CMD_PORT_INIT,
 167                 .port_init.index = 0,
 168                 .port_init.info_pa = idev->port_info_pa,
 169         };
 170
 171         ionic_dev_cmd_go(idev, &cmd);
 172 }
 173
 174 void
 175 ionic_dev_cmd_port_reset(struct ionic_dev *idev)
 176 {
 177         union ionic_dev_cmd cmd = {
 178                 .port_reset.opcode = IONIC_CMD_PORT_RESET,
 179                 .port_reset.index = 0,
 180         };
 181
 182         ionic_dev_cmd_go(idev, &cmd);
 183 }
 184
 185 void
 186 ionic_dev_cmd_port_state(struct ionic_dev *idev, uint8_t state)
 187 {
 188         union ionic_dev_cmd cmd = {
 189                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 190                 .port_setattr.index = 0,
 191                 .port_setattr.attr = IONIC_PORT_ATTR_STATE,
 192                 .port_setattr.state = state,
 193         };
 194
 195         ionic_dev_cmd_go(idev, &cmd);
 196 }
 197
 198 void
 199 ionic_dev_cmd_port_speed(struct ionic_dev *idev, uint32_t speed)
 200 {
 201         union ionic_dev_cmd cmd = {
 202                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 203                 .port_setattr.index = 0,
 204                 .port_setattr.attr = IONIC_PORT_ATTR_SPEED,
 205                 .port_setattr.speed = speed,
 206         };
 207
 208         ionic_dev_cmd_go(idev, &cmd);
 209 }
 210
 211 void
 212 ionic_dev_cmd_port_mtu(struct ionic_dev *idev, uint32_t mtu)
 213 {
 214         union ionic_dev_cmd cmd = {
 215                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 216                 .port_setattr.index = 0,
 217                 .port_setattr.attr = IONIC_PORT_ATTR_MTU,
 218                 .port_setattr.mtu = mtu,
 219         };
 220
 221         ionic_dev_cmd_go(idev, &cmd);
 222 }
 223
 224 void
 225 ionic_dev_cmd_port_autoneg(struct ionic_dev *idev, uint8_t an_enable)
 226 {
 227         union ionic_dev_cmd cmd = {
 228                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 229                 .port_setattr.index = 0,
 230                 .port_setattr.attr = IONIC_PORT_ATTR_AUTONEG,
 231                 .port_setattr.an_enable = an_enable,
 232         };
 233
 234         ionic_dev_cmd_go(idev, &cmd);
 235 }
 236
 237 void
 238 ionic_dev_cmd_port_fec(struct ionic_dev *idev, uint8_t fec_type)
 239 {
 240         union ionic_dev_cmd cmd = {
 241                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 242                 .port_setattr.index = 0,
 243                 .port_setattr.attr = IONIC_PORT_ATTR_FEC,
 244                 .port_setattr.fec_type = fec_type,
 245         };
 246
 247         ionic_dev_cmd_go(idev, &cmd);
 248 }
 249
 250 void
 251 ionic_dev_cmd_port_pause(struct ionic_dev *idev, uint8_t pause_type)
 252 {
 253         union ionic_dev_cmd cmd = {
 254                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 255                 .port_setattr.index = 0,
 256                 .port_setattr.attr = IONIC_PORT_ATTR_PAUSE,
 257                 .port_setattr.pause_type = pause_type,
 258         };
 259
 260         ionic_dev_cmd_go(idev, &cmd);
 261 }
 262
 263 void
 264 ionic_dev_cmd_port_loopback(struct ionic_dev *idev, uint8_t loopback_mode)
 265 {
 266         union ionic_dev_cmd cmd = {
 267                 .port_setattr.opcode = IONIC_CMD_PORT_SETATTR,
 268                 .port_setattr.index = 0,
 269                 .port_setattr.attr = IONIC_PORT_ATTR_LOOPBACK,
 270                 .port_setattr.loopback_mode = loopback_mode,
 271         };
 272
 273         ionic_dev_cmd_go(idev, &cmd);
 274 }
 275
 276 /* LIF commands */
 277
 278 void
 279 ionic_dev_cmd_lif_identify(struct ionic_dev *idev, uint8_t type, uint8_t ver)
 280 {
 281         union ionic_dev_cmd cmd = {
 282                 .lif_identify.opcode = IONIC_CMD_LIF_IDENTIFY,
 283                 .lif_identify.type = type,
 284                 .lif_identify.ver = ver,
 285         };
 286
 287         ionic_dev_cmd_go(idev, &cmd);
 288 }
 289
 290 void
 291 ionic_dev_cmd_lif_init(struct ionic_dev *idev, rte_iova_t info_pa)
 292 {
 293         union ionic_dev_cmd cmd = {
 294                 .lif_init.opcode = IONIC_CMD_LIF_INIT,
 295                 .lif_init.info_pa = info_pa,
 296         };
 297
 298         ionic_dev_cmd_go(idev, &cmd);
 299 }
 300
 301 void
 302 ionic_dev_cmd_lif_reset(struct ionic_dev *idev)
 303 {
 304         union ionic_dev_cmd cmd = {
 305                 .lif_init.opcode = IONIC_CMD_LIF_RESET,
 306         };
 307
 308         ionic_dev_cmd_go(idev, &cmd);
 309 }
 310
 311 struct ionic_doorbell *
 312 ionic_db_map(struct ionic_lif *lif, struct ionic_queue *q)
 313 {
 314         return lif->kern_dbpage + q->hw_type;
 315 }
 316
 317 void
 318 ionic_intr_init(struct ionic_dev *idev, struct ionic_intr_info *intr,
 319                 unsigned long index)
 320 {
 321         ionic_intr_clean(idev->intr_ctrl, index);
 322         intr->index = index;
 323 }
 324
 325 void
 326 ionic_dev_cmd_adminq_init(struct ionic_dev *idev,
 327                 struct ionic_qcq *qcq,
 328                 uint16_t intr_index)
 329 {
 330         struct ionic_queue *q = &qcq->q;
 331         struct ionic_cq *cq = &qcq->cq;
 332
 333         union ionic_dev_cmd cmd = {
 334                 .q_init.opcode = IONIC_CMD_Q_INIT,
 335                 .q_init.type = q->type,
 336                 .q_init.index = q->index,
 337                 .q_init.flags = IONIC_QINIT_F_ENA,
 338                 .q_init.intr_index = intr_index,
 339                 .q_init.ring_size = rte_log2_u32(q->num_descs),
 340                 .q_init.ring_base = q->base_pa,
 341                 .q_init.cq_ring_base = cq->base_pa,
 342         };
 343
 344         IONIC_PRINT(DEBUG, "adminq.q_init.ver %u", cmd.q_init.ver);
 345
 346         ionic_dev_cmd_go(idev, &cmd);
 347 }
 348
 349 int
 350 ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 351                 struct ionic_intr_info *intr,
 352                 uint32_t num_descs, size_t desc_size)
 353 {
 354         if (desc_size == 0) {
 355                 IONIC_PRINT(ERR, "Descriptor size is %zu", desc_size);
 356                 return -EINVAL;
 357         }
 358
 359         if (!rte_is_power_of_2(num_descs) ||
 360             num_descs < IONIC_MIN_RING_DESC ||
 361             num_descs > IONIC_MAX_RING_DESC) {
 362                 IONIC_PRINT(ERR, "%u descriptors (min: %u max: %u)",
 363                         num_descs, IONIC_MIN_RING_DESC, IONIC_MAX_RING_DESC);
 364                 return -EINVAL;
 365         }
 366
 367         cq->lif = lif;
 368         cq->bound_intr = intr;
 369         cq->num_descs = num_descs;
 370         cq->desc_size = desc_size;
 371         cq->tail_idx = 0;
 372         cq->done_color = 1;
 373
 374         return 0;
 375 }
 376
 377 void
 378 ionic_cq_map(struct ionic_cq *cq, void *base, rte_iova_t base_pa)
 379 {
 380         cq->base = base;
 381         cq->base_pa = base_pa;
 382 }
 383
 384 void
 385 ionic_cq_bind(struct ionic_cq *cq, struct ionic_queue *q)
 386 {
 387         cq->bound_q = q;
 388         q->bound_cq = cq;
 389 }
 390
 391 uint32_t
 392 ionic_cq_service(struct ionic_cq *cq, uint32_t work_to_do,
 393                  ionic_cq_cb cb, void *cb_arg)
 394 {
 395         uint32_t work_done = 0;
 396
 397         if (work_to_do == 0)
 398                 return 0;
 399
 400         while (cb(cq, cq->tail_idx, cb_arg)) {
 401                 cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
 402                 if (cq->tail_idx == 0)
 403                         cq->done_color = !cq->done_color;
 404
 405                 if (++work_done == work_to_do)
 406                         break;
 407         }
 408
 409         return work_done;
 410 }
 411
 412 int
 413 ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 414              struct ionic_queue *q, uint32_t index, uint32_t num_descs,
 415              size_t desc_size, size_t sg_desc_size)
 416 {
 417         uint32_t ring_size;
 418
 419         if (desc_size == 0 || !rte_is_power_of_2(num_descs))
 420                 return -EINVAL;
 421
 422         ring_size = rte_log2_u32(num_descs);
 423
 424         if (ring_size < 2 || ring_size > 16)
 425                 return -EINVAL;
 426
 427         q->lif = lif;
 428         q->idev = idev;
 429         q->index = index;
 430         q->num_descs = num_descs;
 431         q->desc_size = desc_size;
 432         q->sg_desc_size = sg_desc_size;
 433         q->head_idx = 0;
 434         q->tail_idx = 0;
 435
 436         return 0;
 437 }
 438
 439 void
 440 ionic_q_map(struct ionic_queue *q, void *base, rte_iova_t base_pa)
 441 {
 442         q->base = base;
 443         q->base_pa = base_pa;
 444 }
 445
 446 void
 447 ionic_q_sg_map(struct ionic_queue *q, void *base, rte_iova_t base_pa)
 448 {
 449         q->sg_base = base;
 450         q->sg_base_pa = base_pa;
 451 }
 452
 453 void
 454 ionic_q_flush(struct ionic_queue *q)
 455 {
 456         writeq(IONIC_DBELL_QID(q->hw_index) | q->head_idx, q->db);
 457 }
 458
 459 void
 460 ionic_q_post(struct ionic_queue *q, bool ring_doorbell, desc_cb cb,
 461              void *cb_arg)
 462 {
 463         struct ionic_desc_info *head = &q->info[q->head_idx];
 464
 465         head->cb = cb;
 466         head->cb_arg = cb_arg;
 467
 468         q->head_idx = (q->head_idx + 1) & (q->num_descs - 1);
 469
 470         if (ring_doorbell)
 471                 ionic_q_flush(q);
 472 }
 473
 474 uint32_t
 475 ionic_q_space_avail(struct ionic_queue *q)
 476 {
 477         uint32_t avail = q->tail_idx;
 478
 479         if (q->head_idx >= avail)
 480                 avail += q->num_descs - q->head_idx - 1;
 481         else
 482                 avail -= q->head_idx + 1;
 483
 484         return avail;
 485 }
 486
 487 bool
 488 ionic_q_has_space(struct ionic_queue *q, uint32_t want)
 489 {
 490         return ionic_q_space_avail(q) >= want;
 491 }
 492
 493 void
 494 ionic_q_service(struct ionic_queue *q, uint32_t cq_desc_index,
 495                 uint32_t stop_index, void *service_cb_arg)
 496 {
 497         struct ionic_desc_info *desc_info;
 498         uint32_t curr_q_tail_idx;
 499
 500         do {
 501                 desc_info = &q->info[q->tail_idx];
 502
 503                 if (desc_info->cb)
 504                         desc_info->cb(q, q->tail_idx, cq_desc_index,
 505                                 desc_info->cb_arg, service_cb_arg);
 506
 507                 desc_info->cb = NULL;
 508                 desc_info->cb_arg = NULL;
 509
 510                 curr_q_tail_idx = q->tail_idx;
 511                 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 512
 513         } while (curr_q_tail_idx != stop_index);
 514 }
 515
 516 static void
 517 ionic_adminq_cb(struct ionic_queue *q,
 518                 uint32_t q_desc_index, uint32_t cq_desc_index,
 519                 void *cb_arg, void *service_cb_arg __rte_unused)
 520 {
 521         struct ionic_admin_ctx *ctx = cb_arg;
 522         struct ionic_admin_comp *cq_desc_base = q->bound_cq->base;
 523         struct ionic_admin_comp *cq_desc = &cq_desc_base[cq_desc_index];
 524
 525         if (unlikely(cq_desc->comp_index != q_desc_index)) {
 526                 IONIC_WARN_ON(cq_desc->comp_index != q_desc_index);
 527                 return;
 528         }
 529
 530         memcpy(&ctx->comp, cq_desc, sizeof(*cq_desc));
 531
 532         ctx->pending_work = false; /* done */
 533 }
 534
 535 /** ionic_adminq_post - Post an admin command.
 536  * @lif:                Handle to lif.
 537  * @cmd_ctx:            Api admin command context.
 538  *
 539  * Post the command to an admin queue in the ethernet driver.  If this command
 540  * succeeds, then the command has been posted, but that does not indicate a
 541  * completion.  If this command returns success, then the completion callback
 542  * will eventually be called.
 543  *
 544  * Return: zero or negative error status.
 545  */
 546 int
 547 ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 548 {
 549         struct ionic_queue *adminq = &lif->adminqcq->q;
 550         struct ionic_admin_cmd *q_desc_base = adminq->base;
 551         struct ionic_admin_cmd *q_desc;
 552         int err = 0;
 553
 554         rte_spinlock_lock(&lif->adminq_lock);
 555
 556         if (!ionic_q_has_space(adminq, 1)) {
 557                 err = -ENOSPC;
 558                 goto err_out;
 559         }
 560
 561         q_desc = &q_desc_base[adminq->head_idx];
 562
 563         memcpy(q_desc, &ctx->cmd, sizeof(ctx->cmd));
 564
 565         ionic_q_post(adminq, true, ionic_adminq_cb, ctx);
 566
 567 err_out:
 568         rte_spinlock_unlock(&lif->adminq_lock);
 569
 570         return err;
 571 }