drivers/net/ethernet/pensando/ionic/ionic_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
   3
   4 #include <linux/printk.h>
   5 #include <linux/dynamic_debug.h>
   6 #include <linux/module.h>
   7 #include <linux/netdevice.h>
   8 #include <linux/utsname.h>
   9 #include <linux/vermagic.h>
  10
  11 #include "ionic.h"
  12 #include "ionic_bus.h"
  13 #include "ionic_lif.h"
  14 #include "ionic_debugfs.h"
  15
  16 MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
  17 MODULE_AUTHOR("Pensando Systems, Inc");
  18 MODULE_LICENSE("GPL");
  19
  20 static const char *ionic_error_to_str(enum ionic_status_code code)
  21 {
  22         switch (code) {
  23         case IONIC_RC_SUCCESS:
  24                 return "IONIC_RC_SUCCESS";
  25         case IONIC_RC_EVERSION:
  26                 return "IONIC_RC_EVERSION";
  27         case IONIC_RC_EOPCODE:
  28                 return "IONIC_RC_EOPCODE";
  29         case IONIC_RC_EIO:
  30                 return "IONIC_RC_EIO";
  31         case IONIC_RC_EPERM:
  32                 return "IONIC_RC_EPERM";
  33         case IONIC_RC_EQID:
  34                 return "IONIC_RC_EQID";
  35         case IONIC_RC_EQTYPE:
  36                 return "IONIC_RC_EQTYPE";
  37         case IONIC_RC_ENOENT:
  38                 return "IONIC_RC_ENOENT";
  39         case IONIC_RC_EINTR:
  40                 return "IONIC_RC_EINTR";
  41         case IONIC_RC_EAGAIN:
  42                 return "IONIC_RC_EAGAIN";
  43         case IONIC_RC_ENOMEM:
  44                 return "IONIC_RC_ENOMEM";
  45         case IONIC_RC_EFAULT:
  46                 return "IONIC_RC_EFAULT";
  47         case IONIC_RC_EBUSY:
  48                 return "IONIC_RC_EBUSY";
  49         case IONIC_RC_EEXIST:
  50                 return "IONIC_RC_EEXIST";
  51         case IONIC_RC_EINVAL:
  52                 return "IONIC_RC_EINVAL";
  53         case IONIC_RC_ENOSPC:
  54                 return "IONIC_RC_ENOSPC";
  55         case IONIC_RC_ERANGE:
  56                 return "IONIC_RC_ERANGE";
  57         case IONIC_RC_BAD_ADDR:
  58                 return "IONIC_RC_BAD_ADDR";
  59         case IONIC_RC_DEV_CMD:
  60                 return "IONIC_RC_DEV_CMD";
  61         case IONIC_RC_ENOSUPP:
  62                 return "IONIC_RC_ENOSUPP";
  63         case IONIC_RC_ERROR:
  64                 return "IONIC_RC_ERROR";
  65         case IONIC_RC_ERDMA:
  66                 return "IONIC_RC_ERDMA";
  67         default:
  68                 return "IONIC_RC_UNKNOWN";
  69         }
  70 }
  71
  72 static int ionic_error_to_errno(enum ionic_status_code code)
  73 {
  74         switch (code) {
  75         case IONIC_RC_SUCCESS:
  76                 return 0;
  77         case IONIC_RC_EVERSION:
  78         case IONIC_RC_EQTYPE:
  79         case IONIC_RC_EQID:
  80         case IONIC_RC_EINVAL:
  81         case IONIC_RC_ENOSUPP:
  82                 return -EINVAL;
  83         case IONIC_RC_EPERM:
  84                 return -EPERM;
  85         case IONIC_RC_ENOENT:
  86                 return -ENOENT;
  87         case IONIC_RC_EAGAIN:
  88                 return -EAGAIN;
  89         case IONIC_RC_ENOMEM:
  90                 return -ENOMEM;
  91         case IONIC_RC_EFAULT:
  92                 return -EFAULT;
  93         case IONIC_RC_EBUSY:
  94                 return -EBUSY;
  95         case IONIC_RC_EEXIST:
  96                 return -EEXIST;
  97         case IONIC_RC_ENOSPC:
  98                 return -ENOSPC;
  99         case IONIC_RC_ERANGE:
 100                 return -ERANGE;
 101         case IONIC_RC_BAD_ADDR:
 102                 return -EFAULT;
 103         case IONIC_RC_EOPCODE:
 104         case IONIC_RC_EINTR:
 105         case IONIC_RC_DEV_CMD:
 106         case IONIC_RC_ERROR:
 107         case IONIC_RC_ERDMA:
 108         case IONIC_RC_EIO:
 109         default:
 110                 return -EIO;
 111         }
 112 }
 113
 114 static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
 115 {
 116         switch (opcode) {
 117         case IONIC_CMD_NOP:
 118                 return "IONIC_CMD_NOP";
 119         case IONIC_CMD_INIT:
 120                 return "IONIC_CMD_INIT";
 121         case IONIC_CMD_RESET:
 122                 return "IONIC_CMD_RESET";
 123         case IONIC_CMD_IDENTIFY:
 124                 return "IONIC_CMD_IDENTIFY";
 125         case IONIC_CMD_GETATTR:
 126                 return "IONIC_CMD_GETATTR";
 127         case IONIC_CMD_SETATTR:
 128                 return "IONIC_CMD_SETATTR";
 129         case IONIC_CMD_PORT_IDENTIFY:
 130                 return "IONIC_CMD_PORT_IDENTIFY";
 131         case IONIC_CMD_PORT_INIT:
 132                 return "IONIC_CMD_PORT_INIT";
 133         case IONIC_CMD_PORT_RESET:
 134                 return "IONIC_CMD_PORT_RESET";
 135         case IONIC_CMD_PORT_GETATTR:
 136                 return "IONIC_CMD_PORT_GETATTR";
 137         case IONIC_CMD_PORT_SETATTR:
 138                 return "IONIC_CMD_PORT_SETATTR";
 139         case IONIC_CMD_LIF_INIT:
 140                 return "IONIC_CMD_LIF_INIT";
 141         case IONIC_CMD_LIF_RESET:
 142                 return "IONIC_CMD_LIF_RESET";
 143         case IONIC_CMD_LIF_IDENTIFY:
 144                 return "IONIC_CMD_LIF_IDENTIFY";
 145         case IONIC_CMD_LIF_SETATTR:
 146                 return "IONIC_CMD_LIF_SETATTR";
 147         case IONIC_CMD_LIF_GETATTR:
 148                 return "IONIC_CMD_LIF_GETATTR";
 149         case IONIC_CMD_RX_MODE_SET:
 150                 return "IONIC_CMD_RX_MODE_SET";
 151         case IONIC_CMD_RX_FILTER_ADD:
 152                 return "IONIC_CMD_RX_FILTER_ADD";
 153         case IONIC_CMD_RX_FILTER_DEL:
 154                 return "IONIC_CMD_RX_FILTER_DEL";
 155         case IONIC_CMD_Q_INIT:
 156                 return "IONIC_CMD_Q_INIT";
 157         case IONIC_CMD_Q_CONTROL:
 158                 return "IONIC_CMD_Q_CONTROL";
 159         case IONIC_CMD_RDMA_RESET_LIF:
 160                 return "IONIC_CMD_RDMA_RESET_LIF";
 161         case IONIC_CMD_RDMA_CREATE_EQ:
 162                 return "IONIC_CMD_RDMA_CREATE_EQ";
 163         case IONIC_CMD_RDMA_CREATE_CQ:
 164                 return "IONIC_CMD_RDMA_CREATE_CQ";
 165         case IONIC_CMD_RDMA_CREATE_ADMINQ:
 166                 return "IONIC_CMD_RDMA_CREATE_ADMINQ";
 167         case IONIC_CMD_FW_DOWNLOAD:
 168                 return "IONIC_CMD_FW_DOWNLOAD";
 169         case IONIC_CMD_FW_CONTROL:
 170                 return "IONIC_CMD_FW_CONTROL";
 171         case IONIC_CMD_VF_GETATTR:
 172                 return "IONIC_CMD_VF_GETATTR";
 173         case IONIC_CMD_VF_SETATTR:
 174                 return "IONIC_CMD_VF_SETATTR";
 175         default:
 176                 return "DEVCMD_UNKNOWN";
 177         }
 178 }
 179
 180 static void ionic_adminq_flush(struct ionic_lif *lif)
 181 {
 182         struct ionic_queue *adminq = &lif->adminqcq->q;
 183
 184         spin_lock(&lif->adminq_lock);
 185
 186         while (adminq->tail != adminq->head) {
 187                 memset(adminq->tail->desc, 0, sizeof(union ionic_adminq_cmd));
 188                 adminq->tail->cb = NULL;
 189                 adminq->tail->cb_arg = NULL;
 190                 adminq->tail = adminq->tail->next;
 191         }
 192         spin_unlock(&lif->adminq_lock);
 193 }
 194
 195 static int ionic_adminq_check_err(struct ionic_lif *lif,
 196                                   struct ionic_admin_ctx *ctx,
 197                                   bool timeout)
 198 {
 199         struct net_device *netdev = lif->netdev;
 200         const char *opcode_str;
 201         const char *status_str;
 202         int err = 0;
 203
 204         if (ctx->comp.comp.status || timeout) {
 205                 opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 206                 status_str = ionic_error_to_str(ctx->comp.comp.status);
 207                 err = timeout ? -ETIMEDOUT :
 208                                 ionic_error_to_errno(ctx->comp.comp.status);
 209
 210                 netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
 211                            opcode_str, ctx->cmd.cmd.opcode,
 212                            timeout ? "TIMEOUT" : status_str, err);
 213
 214                 if (timeout)
 215                         ionic_adminq_flush(lif);
 216         }
 217
 218         return err;
 219 }
 220
 221 static void ionic_adminq_cb(struct ionic_queue *q,
 222                             struct ionic_desc_info *desc_info,
 223                             struct ionic_cq_info *cq_info, void *cb_arg)
 224 {
 225         struct ionic_admin_ctx *ctx = cb_arg;
 226         struct ionic_admin_comp *comp;
 227         struct device *dev;
 228
 229         if (!ctx)
 230                 return;
 231
 232         comp = cq_info->cq_desc;
 233         dev = &q->lif->netdev->dev;
 234
 235         memcpy(&ctx->comp, comp, sizeof(*comp));
 236
 237         dev_dbg(dev, "comp admin queue command:\n");
 238         dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
 239                          &ctx->comp, sizeof(ctx->comp), true);
 240
 241         complete_all(&ctx->work);
 242 }
 243
 244 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 245 {
 246         struct ionic_queue *adminq;
 247         int err = 0;
 248
 249         WARN_ON(in_interrupt());
 250
 251         if (!lif->adminqcq)
 252                 return -EIO;
 253
 254         adminq = &lif->adminqcq->q;
 255
 256         spin_lock(&lif->adminq_lock);
 257         if (!ionic_q_has_space(adminq, 1)) {
 258                 err = -ENOSPC;
 259                 goto err_out;
 260         }
 261
 262         err = ionic_heartbeat_check(lif->ionic);
 263         if (err)
 264                 goto err_out;
 265
 266         memcpy(adminq->head->desc, &ctx->cmd, sizeof(ctx->cmd));
 267
 268         dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
 269         dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
 270                          &ctx->cmd, sizeof(ctx->cmd), true);
 271
 272         ionic_q_post(adminq, true, ionic_adminq_cb, ctx);
 273
 274 err_out:
 275         spin_unlock(&lif->adminq_lock);
 276
 277         return err;
 278 }
 279
 280 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 281 {
 282         struct net_device *netdev = lif->netdev;
 283         unsigned long remaining;
 284         const char *name;
 285         int err;
 286
 287         err = ionic_adminq_post(lif, ctx);
 288         if (err) {
 289                 name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 290                 netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
 291                            name, ctx->cmd.cmd.opcode, err);
 292                 return err;
 293         }
 294
 295         remaining = wait_for_completion_timeout(&ctx->work,
 296                                                 HZ * (ulong)DEVCMD_TIMEOUT);
 297         return ionic_adminq_check_err(lif, ctx, (remaining == 0));
 298 }
 299
 300 int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb,
 301                ionic_cq_done_cb done_cb, void *done_arg)
 302 {
 303         struct ionic_qcq *qcq = napi_to_qcq(napi);
 304         struct ionic_cq *cq = &qcq->cq;
 305         u32 work_done, flags = 0;
 306
 307         work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg);
 308
 309         if (work_done < budget && napi_complete_done(napi, work_done)) {
 310                 flags |= IONIC_INTR_CRED_UNMASK;
 311                 DEBUG_STATS_INTR_REARM(cq->bound_intr);
 312         }
 313
 314         if (work_done || flags) {
 315                 flags |= IONIC_INTR_CRED_RESET_COALESCE;
 316                 ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl,
 317                                    cq->bound_intr->index,
 318                                    work_done, flags);
 319         }
 320
 321         DEBUG_STATS_NAPI_POLL(qcq, work_done);
 322
 323         return work_done;
 324 }
 325
 326 static void ionic_dev_cmd_clean(struct ionic *ionic)
 327 {
 328         union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
 329
 330         iowrite32(0, &regs->doorbell);
 331         memset_io(&regs->cmd, 0, sizeof(regs->cmd));
 332 }
 333
 334 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
 335 {
 336         struct ionic_dev *idev = &ionic->idev;
 337         unsigned long start_time;
 338         unsigned long max_wait;
 339         unsigned long duration;
 340         int opcode;
 341         int hb = 0;
 342         int done;
 343         int err;
 344
 345         WARN_ON(in_interrupt());
 346
 347         /* Wait for dev cmd to complete, retrying if we get EAGAIN,
 348          * but don't wait any longer than max_seconds.
 349          */
 350         max_wait = jiffies + (max_seconds * HZ);
 351 try_again:
 352         start_time = jiffies;
 353         do {
 354                 done = ionic_dev_cmd_done(idev);
 355                 if (done)
 356                         break;
 357                 msleep(20);
 358                 hb = ionic_heartbeat_check(ionic);
 359         } while (!done && !hb && time_before(jiffies, max_wait));
 360         duration = jiffies - start_time;
 361
 362         opcode = idev->dev_cmd_regs->cmd.cmd.opcode;
 363         dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
 364                 ionic_opcode_to_str(opcode), opcode,
 365                 done, duration / HZ, duration);
 366
 367         if (!done && hb) {
 368                 /* It is possible (but unlikely) that FW was busy and missed a
 369                  * heartbeat check but is still alive and will process this
 370                  * request, so don't clean the dev_cmd in this case.
 371                  */
 372                 dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
 373                          ionic_opcode_to_str(opcode), opcode);
 374                 return -ENXIO;
 375         }
 376
 377         if (!done && !time_before(jiffies, max_wait)) {
 378                 ionic_dev_cmd_clean(ionic);
 379                 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
 380                          ionic_opcode_to_str(opcode), opcode, max_seconds);
 381                 return -ETIMEDOUT;
 382         }
 383
 384         err = ionic_dev_cmd_status(&ionic->idev);
 385         if (err) {
 386                 if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) {
 387                         dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n",
 388                                 ionic_opcode_to_str(opcode), opcode,
 389                                 ionic_error_to_str(err), err);
 390
 391                         msleep(1000);
 392                         iowrite32(0, &idev->dev_cmd_regs->done);
 393                         iowrite32(1, &idev->dev_cmd_regs->doorbell);
 394                         goto try_again;
 395                 }
 396
 397                 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
 398                         ionic_opcode_to_str(opcode), opcode,
 399                         ionic_error_to_str(err), err);
 400
 401                 return ionic_error_to_errno(err);
 402         }
 403
 404         return 0;
 405 }
 406
 407 int ionic_setup(struct ionic *ionic)
 408 {
 409         int err;
 410
 411         err = ionic_dev_setup(ionic);
 412         if (err)
 413                 return err;
 414
 415         return 0;
 416 }
 417
 418 int ionic_identify(struct ionic *ionic)
 419 {
 420         struct ionic_identity *ident = &ionic->ident;
 421         struct ionic_dev *idev = &ionic->idev;
 422         size_t sz;
 423         int err;
 424
 425         memset(ident, 0, sizeof(*ident));
 426
 427         ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
 428         strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
 429                 sizeof(ident->drv.driver_ver_str) - 1);
 430
 431         mutex_lock(&ionic->dev_cmd_lock);
 432
 433         sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
 434         memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
 435
 436         ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
 437         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 438         if (!err) {
 439                 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
 440                 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
 441         }
 442
 443         mutex_unlock(&ionic->dev_cmd_lock);
 444
 445         if (err)
 446                 goto err_out_unmap;
 447
 448         ionic_debugfs_add_ident(ionic);
 449
 450         return 0;
 451
 452 err_out_unmap:
 453         return err;
 454 }
 455
 456 int ionic_init(struct ionic *ionic)
 457 {
 458         struct ionic_dev *idev = &ionic->idev;
 459         int err;
 460
 461         mutex_lock(&ionic->dev_cmd_lock);
 462         ionic_dev_cmd_init(idev);
 463         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 464         mutex_unlock(&ionic->dev_cmd_lock);
 465
 466         return err;
 467 }
 468
 469 int ionic_reset(struct ionic *ionic)
 470 {
 471         struct ionic_dev *idev = &ionic->idev;
 472         int err;
 473
 474         mutex_lock(&ionic->dev_cmd_lock);
 475         ionic_dev_cmd_reset(idev);
 476         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 477         mutex_unlock(&ionic->dev_cmd_lock);
 478
 479         return err;
 480 }
 481
 482 int ionic_port_identify(struct ionic *ionic)
 483 {
 484         struct ionic_identity *ident = &ionic->ident;
 485         struct ionic_dev *idev = &ionic->idev;
 486         size_t sz;
 487         int err;
 488
 489         mutex_lock(&ionic->dev_cmd_lock);
 490
 491         ionic_dev_cmd_port_identify(idev);
 492         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 493         if (!err) {
 494                 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
 495                 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
 496         }
 497
 498         mutex_unlock(&ionic->dev_cmd_lock);
 499
 500         return err;
 501 }
 502
 503 int ionic_port_init(struct ionic *ionic)
 504 {
 505         struct ionic_identity *ident = &ionic->ident;
 506         struct ionic_dev *idev = &ionic->idev;
 507         size_t sz;
 508         int err;
 509
 510         if (idev->port_info)
 511                 return 0;
 512
 513         idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
 514         idev->port_info = dma_alloc_coherent(ionic->dev, idev->port_info_sz,
 515                                              &idev->port_info_pa,
 516                                              GFP_KERNEL);
 517         if (!idev->port_info) {
 518                 dev_err(ionic->dev, "Failed to allocate port info, aborting\n");
 519                 return -ENOMEM;
 520         }
 521
 522         sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
 523
 524         mutex_lock(&ionic->dev_cmd_lock);
 525
 526         memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
 527         ionic_dev_cmd_port_init(idev);
 528         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 529
 530         ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
 531         (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 532
 533         mutex_unlock(&ionic->dev_cmd_lock);
 534         if (err) {
 535                 dev_err(ionic->dev, "Failed to init port\n");
 536                 dma_free_coherent(ionic->dev, idev->port_info_sz,
 537                                   idev->port_info, idev->port_info_pa);
 538                 idev->port_info = NULL;
 539                 idev->port_info_pa = 0;
 540         }
 541
 542         return err;
 543 }
 544
 545 int ionic_port_reset(struct ionic *ionic)
 546 {
 547         struct ionic_dev *idev = &ionic->idev;
 548         int err;
 549
 550         if (!idev->port_info)
 551                 return 0;
 552
 553         mutex_lock(&ionic->dev_cmd_lock);
 554         ionic_dev_cmd_port_reset(idev);
 555         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 556         mutex_unlock(&ionic->dev_cmd_lock);
 557
 558         dma_free_coherent(ionic->dev, idev->port_info_sz,
 559                           idev->port_info, idev->port_info_pa);
 560
 561         idev->port_info = NULL;
 562         idev->port_info_pa = 0;
 563
 564         if (err)
 565                 dev_err(ionic->dev, "Failed to reset port\n");
 566
 567         return err;
 568 }
 569
 570 static int __init ionic_init_module(void)
 571 {
 572         ionic_debugfs_create();
 573         return ionic_bus_register_driver();
 574 }
 575
 576 static void __exit ionic_cleanup_module(void)
 577 {
 578         ionic_bus_unregister_driver();
 579         ionic_debugfs_destroy();
 580
 581         pr_info("%s removed\n", IONIC_DRV_NAME);
 582 }
 583
 584 module_init(ionic_init_module);
 585 module_exit(ionic_cleanup_module);