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 <generated/utsrelease.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         case IONIC_RC_EBAD_FW:
  68                 return "IONIC_RC_EBAD_FW";
  69         default:
  70                 return "IONIC_RC_UNKNOWN";
  71         }
  72 }
  73
  74 static int ionic_error_to_errno(enum ionic_status_code code)
  75 {
  76         switch (code) {
  77         case IONIC_RC_SUCCESS:
  78                 return 0;
  79         case IONIC_RC_EVERSION:
  80         case IONIC_RC_EQTYPE:
  81         case IONIC_RC_EQID:
  82         case IONIC_RC_EINVAL:
  83         case IONIC_RC_ENOSUPP:
  84                 return -EINVAL;
  85         case IONIC_RC_EPERM:
  86                 return -EPERM;
  87         case IONIC_RC_ENOENT:
  88                 return -ENOENT;
  89         case IONIC_RC_EAGAIN:
  90                 return -EAGAIN;
  91         case IONIC_RC_ENOMEM:
  92                 return -ENOMEM;
  93         case IONIC_RC_EFAULT:
  94                 return -EFAULT;
  95         case IONIC_RC_EBUSY:
  96                 return -EBUSY;
  97         case IONIC_RC_EEXIST:
  98                 return -EEXIST;
  99         case IONIC_RC_ENOSPC:
 100                 return -ENOSPC;
 101         case IONIC_RC_ERANGE:
 102                 return -ERANGE;
 103         case IONIC_RC_BAD_ADDR:
 104                 return -EFAULT;
 105         case IONIC_RC_EOPCODE:
 106         case IONIC_RC_EINTR:
 107         case IONIC_RC_DEV_CMD:
 108         case IONIC_RC_ERROR:
 109         case IONIC_RC_ERDMA:
 110         case IONIC_RC_EIO:
 111         default:
 112                 return -EIO;
 113         }
 114 }
 115
 116 static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
 117 {
 118         switch (opcode) {
 119         case IONIC_CMD_NOP:
 120                 return "IONIC_CMD_NOP";
 121         case IONIC_CMD_INIT:
 122                 return "IONIC_CMD_INIT";
 123         case IONIC_CMD_RESET:
 124                 return "IONIC_CMD_RESET";
 125         case IONIC_CMD_IDENTIFY:
 126                 return "IONIC_CMD_IDENTIFY";
 127         case IONIC_CMD_GETATTR:
 128                 return "IONIC_CMD_GETATTR";
 129         case IONIC_CMD_SETATTR:
 130                 return "IONIC_CMD_SETATTR";
 131         case IONIC_CMD_PORT_IDENTIFY:
 132                 return "IONIC_CMD_PORT_IDENTIFY";
 133         case IONIC_CMD_PORT_INIT:
 134                 return "IONIC_CMD_PORT_INIT";
 135         case IONIC_CMD_PORT_RESET:
 136                 return "IONIC_CMD_PORT_RESET";
 137         case IONIC_CMD_PORT_GETATTR:
 138                 return "IONIC_CMD_PORT_GETATTR";
 139         case IONIC_CMD_PORT_SETATTR:
 140                 return "IONIC_CMD_PORT_SETATTR";
 141         case IONIC_CMD_LIF_INIT:
 142                 return "IONIC_CMD_LIF_INIT";
 143         case IONIC_CMD_LIF_RESET:
 144                 return "IONIC_CMD_LIF_RESET";
 145         case IONIC_CMD_LIF_IDENTIFY:
 146                 return "IONIC_CMD_LIF_IDENTIFY";
 147         case IONIC_CMD_LIF_SETATTR:
 148                 return "IONIC_CMD_LIF_SETATTR";
 149         case IONIC_CMD_LIF_GETATTR:
 150                 return "IONIC_CMD_LIF_GETATTR";
 151         case IONIC_CMD_RX_MODE_SET:
 152                 return "IONIC_CMD_RX_MODE_SET";
 153         case IONIC_CMD_RX_FILTER_ADD:
 154                 return "IONIC_CMD_RX_FILTER_ADD";
 155         case IONIC_CMD_RX_FILTER_DEL:
 156                 return "IONIC_CMD_RX_FILTER_DEL";
 157         case IONIC_CMD_Q_IDENTIFY:
 158                 return "IONIC_CMD_Q_IDENTIFY";
 159         case IONIC_CMD_Q_INIT:
 160                 return "IONIC_CMD_Q_INIT";
 161         case IONIC_CMD_Q_CONTROL:
 162                 return "IONIC_CMD_Q_CONTROL";
 163         case IONIC_CMD_RDMA_RESET_LIF:
 164                 return "IONIC_CMD_RDMA_RESET_LIF";
 165         case IONIC_CMD_RDMA_CREATE_EQ:
 166                 return "IONIC_CMD_RDMA_CREATE_EQ";
 167         case IONIC_CMD_RDMA_CREATE_CQ:
 168                 return "IONIC_CMD_RDMA_CREATE_CQ";
 169         case IONIC_CMD_RDMA_CREATE_ADMINQ:
 170                 return "IONIC_CMD_RDMA_CREATE_ADMINQ";
 171         case IONIC_CMD_FW_DOWNLOAD:
 172                 return "IONIC_CMD_FW_DOWNLOAD";
 173         case IONIC_CMD_FW_CONTROL:
 174                 return "IONIC_CMD_FW_CONTROL";
 175         case IONIC_CMD_FW_DOWNLOAD_V1:
 176                 return "IONIC_CMD_FW_DOWNLOAD_V1";
 177         case IONIC_CMD_FW_CONTROL_V1:
 178                 return "IONIC_CMD_FW_CONTROL_V1";
 179         case IONIC_CMD_VF_GETATTR:
 180                 return "IONIC_CMD_VF_GETATTR";
 181         case IONIC_CMD_VF_SETATTR:
 182                 return "IONIC_CMD_VF_SETATTR";
 183         default:
 184                 return "DEVCMD_UNKNOWN";
 185         }
 186 }
 187
 188 static void ionic_adminq_flush(struct ionic_lif *lif)
 189 {
 190         struct ionic_queue *q = &lif->adminqcq->q;
 191         struct ionic_desc_info *desc_info;
 192
 193         spin_lock(&lif->adminq_lock);
 194
 195         while (q->tail_idx != q->head_idx) {
 196                 desc_info = &q->info[q->tail_idx];
 197                 memset(desc_info->desc, 0, sizeof(union ionic_adminq_cmd));
 198                 desc_info->cb = NULL;
 199                 desc_info->cb_arg = NULL;
 200                 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 201         }
 202         spin_unlock(&lif->adminq_lock);
 203 }
 204
 205 static int ionic_adminq_check_err(struct ionic_lif *lif,
 206                                   struct ionic_admin_ctx *ctx,
 207                                   bool timeout)
 208 {
 209         struct net_device *netdev = lif->netdev;
 210         const char *opcode_str;
 211         const char *status_str;
 212         int err = 0;
 213
 214         if (ctx->comp.comp.status || timeout) {
 215                 opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 216                 status_str = ionic_error_to_str(ctx->comp.comp.status);
 217                 err = timeout ? -ETIMEDOUT :
 218                                 ionic_error_to_errno(ctx->comp.comp.status);
 219
 220                 netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
 221                            opcode_str, ctx->cmd.cmd.opcode,
 222                            timeout ? "TIMEOUT" : status_str, err);
 223
 224                 if (timeout)
 225                         ionic_adminq_flush(lif);
 226         }
 227
 228         return err;
 229 }
 230
 231 static void ionic_adminq_cb(struct ionic_queue *q,
 232                             struct ionic_desc_info *desc_info,
 233                             struct ionic_cq_info *cq_info, void *cb_arg)
 234 {
 235         struct ionic_admin_ctx *ctx = cb_arg;
 236         struct ionic_admin_comp *comp;
 237         struct device *dev;
 238
 239         if (!ctx)
 240                 return;
 241
 242         comp = cq_info->cq_desc;
 243         dev = &q->lif->netdev->dev;
 244
 245         memcpy(&ctx->comp, comp, sizeof(*comp));
 246
 247         dev_dbg(dev, "comp admin queue command:\n");
 248         dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
 249                          &ctx->comp, sizeof(ctx->comp), true);
 250
 251         complete_all(&ctx->work);
 252 }
 253
 254 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 255 {
 256         struct ionic_desc_info *desc_info;
 257         struct ionic_queue *q;
 258         int err = 0;
 259
 260         if (!lif->adminqcq)
 261                 return -EIO;
 262
 263         q = &lif->adminqcq->q;
 264
 265         spin_lock(&lif->adminq_lock);
 266         if (!ionic_q_has_space(q, 1)) {
 267                 err = -ENOSPC;
 268                 goto err_out;
 269         }
 270
 271         err = ionic_heartbeat_check(lif->ionic);
 272         if (err)
 273                 goto err_out;
 274
 275         desc_info = &q->info[q->head_idx];
 276         memcpy(desc_info->desc, &ctx->cmd, sizeof(ctx->cmd));
 277
 278         dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
 279         dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
 280                          &ctx->cmd, sizeof(ctx->cmd), true);
 281
 282         ionic_q_post(q, true, ionic_adminq_cb, ctx);
 283
 284 err_out:
 285         spin_unlock(&lif->adminq_lock);
 286
 287         return err;
 288 }
 289
 290 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 291 {
 292         struct net_device *netdev = lif->netdev;
 293         unsigned long remaining;
 294         const char *name;
 295         int err;
 296
 297         err = ionic_adminq_post(lif, ctx);
 298         if (err) {
 299                 if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
 300                         name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 301                         netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
 302                                    name, ctx->cmd.cmd.opcode, err);
 303                 }
 304                 return err;
 305         }
 306
 307         remaining = wait_for_completion_timeout(&ctx->work,
 308                                                 HZ * (ulong)DEVCMD_TIMEOUT);
 309         return ionic_adminq_check_err(lif, ctx, (remaining == 0));
 310 }
 311
 312 static void ionic_dev_cmd_clean(struct ionic *ionic)
 313 {
 314         union __iomem ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
 315
 316         iowrite32(0, &regs->doorbell);
 317         memset_io(&regs->cmd, 0, sizeof(regs->cmd));
 318 }
 319
 320 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
 321 {
 322         struct ionic_dev *idev = &ionic->idev;
 323         unsigned long start_time;
 324         unsigned long max_wait;
 325         unsigned long duration;
 326         int opcode;
 327         int hb = 0;
 328         int done;
 329         int err;
 330
 331         /* Wait for dev cmd to complete, retrying if we get EAGAIN,
 332          * but don't wait any longer than max_seconds.
 333          */
 334         max_wait = jiffies + (max_seconds * HZ);
 335 try_again:
 336         opcode = readb(&idev->dev_cmd_regs->cmd.cmd.opcode);
 337         start_time = jiffies;
 338         do {
 339                 done = ionic_dev_cmd_done(idev);
 340                 if (done)
 341                         break;
 342                 usleep_range(100, 200);
 343
 344                 /* Don't check the heartbeat on FW_CONTROL commands as they are
 345                  * notorious for interrupting the firmware's heartbeat update.
 346                  */
 347                 if (opcode != IONIC_CMD_FW_CONTROL)
 348                         hb = ionic_heartbeat_check(ionic);
 349         } while (!done && !hb && time_before(jiffies, max_wait));
 350         duration = jiffies - start_time;
 351
 352         dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
 353                 ionic_opcode_to_str(opcode), opcode,
 354                 done, duration / HZ, duration);
 355
 356         if (!done && hb) {
 357                 /* It is possible (but unlikely) that FW was busy and missed a
 358                  * heartbeat check but is still alive and will process this
 359                  * request, so don't clean the dev_cmd in this case.
 360                  */
 361                 dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
 362                          ionic_opcode_to_str(opcode), opcode);
 363                 return -ENXIO;
 364         }
 365
 366         if (!done && !time_before(jiffies, max_wait)) {
 367                 ionic_dev_cmd_clean(ionic);
 368                 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
 369                          ionic_opcode_to_str(opcode), opcode, max_seconds);
 370                 return -ETIMEDOUT;
 371         }
 372
 373         err = ionic_dev_cmd_status(&ionic->idev);
 374         if (err) {
 375                 if (err == IONIC_RC_EAGAIN &&
 376                     time_before(jiffies, (max_wait - HZ))) {
 377                         dev_dbg(ionic->dev, "DEV_CMD %s (%d), %s (%d) retrying...\n",
 378                                 ionic_opcode_to_str(opcode), opcode,
 379                                 ionic_error_to_str(err), err);
 380
 381                         msleep(1000);
 382                         iowrite32(0, &idev->dev_cmd_regs->done);
 383                         iowrite32(1, &idev->dev_cmd_regs->doorbell);
 384                         goto try_again;
 385                 }
 386
 387                 if (!(opcode == IONIC_CMD_FW_CONTROL && err == IONIC_RC_EAGAIN))
 388                         dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
 389                                 ionic_opcode_to_str(opcode), opcode,
 390                                 ionic_error_to_str(err), err);
 391
 392                 return ionic_error_to_errno(err);
 393         }
 394
 395         return 0;
 396 }
 397
 398 int ionic_setup(struct ionic *ionic)
 399 {
 400         int err;
 401
 402         err = ionic_dev_setup(ionic);
 403         if (err)
 404                 return err;
 405         ionic_reset(ionic);
 406
 407         return 0;
 408 }
 409
 410 int ionic_identify(struct ionic *ionic)
 411 {
 412         struct ionic_identity *ident = &ionic->ident;
 413         struct ionic_dev *idev = &ionic->idev;
 414         size_t sz;
 415         int err;
 416
 417         memset(ident, 0, sizeof(*ident));
 418
 419         ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
 420         strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
 421                 sizeof(ident->drv.driver_ver_str) - 1);
 422
 423         mutex_lock(&ionic->dev_cmd_lock);
 424
 425         sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
 426         memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
 427
 428         ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
 429         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 430         if (!err) {
 431                 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
 432                 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
 433         }
 434         mutex_unlock(&ionic->dev_cmd_lock);
 435
 436         if (err) {
 437                 dev_err(ionic->dev, "Cannot identify ionic: %dn", err);
 438                 goto err_out;
 439         }
 440
 441         err = ionic_lif_identify(ionic, IONIC_LIF_TYPE_CLASSIC,
 442                                  &ionic->ident.lif);
 443         if (err) {
 444                 dev_err(ionic->dev, "Cannot identify LIFs: %d\n", err);
 445                 goto err_out;
 446         }
 447
 448         return 0;
 449
 450 err_out:
 451         return err;
 452 }
 453
 454 int ionic_init(struct ionic *ionic)
 455 {
 456         struct ionic_dev *idev = &ionic->idev;
 457         int err;
 458
 459         mutex_lock(&ionic->dev_cmd_lock);
 460         ionic_dev_cmd_init(idev);
 461         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 462         mutex_unlock(&ionic->dev_cmd_lock);
 463
 464         return err;
 465 }
 466
 467 int ionic_reset(struct ionic *ionic)
 468 {
 469         struct ionic_dev *idev = &ionic->idev;
 470         int err;
 471
 472         mutex_lock(&ionic->dev_cmd_lock);
 473         ionic_dev_cmd_reset(idev);
 474         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 475         mutex_unlock(&ionic->dev_cmd_lock);
 476
 477         return err;
 478 }
 479
 480 int ionic_port_identify(struct ionic *ionic)
 481 {
 482         struct ionic_identity *ident = &ionic->ident;
 483         struct ionic_dev *idev = &ionic->idev;
 484         size_t sz;
 485         int err;
 486
 487         mutex_lock(&ionic->dev_cmd_lock);
 488
 489         ionic_dev_cmd_port_identify(idev);
 490         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 491         if (!err) {
 492                 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
 493                 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
 494         }
 495
 496         mutex_unlock(&ionic->dev_cmd_lock);
 497
 498         return err;
 499 }
 500
 501 int ionic_port_init(struct ionic *ionic)
 502 {
 503         struct ionic_identity *ident = &ionic->ident;
 504         struct ionic_dev *idev = &ionic->idev;
 505         size_t sz;
 506         int err;
 507
 508         if (!idev->port_info) {
 509                 idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
 510                 idev->port_info = dma_alloc_coherent(ionic->dev,
 511                                                      idev->port_info_sz,
 512                                                      &idev->port_info_pa,
 513                                                      GFP_KERNEL);
 514                 if (!idev->port_info) {
 515                         dev_err(ionic->dev, "Failed to allocate port info\n");
 516                         return -ENOMEM;
 517                 }
 518         }
 519
 520         sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
 521
 522         mutex_lock(&ionic->dev_cmd_lock);
 523
 524         memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
 525         ionic_dev_cmd_port_init(idev);
 526         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 527
 528         ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
 529         (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 530
 531         mutex_unlock(&ionic->dev_cmd_lock);
 532         if (err) {
 533                 dev_err(ionic->dev, "Failed to init port\n");
 534                 dma_free_coherent(ionic->dev, idev->port_info_sz,
 535                                   idev->port_info, idev->port_info_pa);
 536                 idev->port_info = NULL;
 537                 idev->port_info_pa = 0;
 538         }
 539
 540         return err;
 541 }
 542
 543 int ionic_port_reset(struct ionic *ionic)
 544 {
 545         struct ionic_dev *idev = &ionic->idev;
 546         int err;
 547
 548         if (!idev->port_info)
 549                 return 0;
 550
 551         mutex_lock(&ionic->dev_cmd_lock);
 552         ionic_dev_cmd_port_reset(idev);
 553         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 554         mutex_unlock(&ionic->dev_cmd_lock);
 555
 556         dma_free_coherent(ionic->dev, idev->port_info_sz,
 557                           idev->port_info, idev->port_info_pa);
 558
 559         idev->port_info = NULL;
 560         idev->port_info_pa = 0;
 561
 562         if (err)
 563                 dev_err(ionic->dev, "Failed to reset port\n");
 564
 565         return err;
 566 }
 567
 568 static int __init ionic_init_module(void)
 569 {
 570         ionic_debugfs_create();
 571         return ionic_bus_register_driver();
 572 }
 573
 574 static void __exit ionic_cleanup_module(void)
 575 {
 576         ionic_bus_unregister_driver();
 577         ionic_debugfs_destroy();
 578
 579         pr_info("%s removed\n", IONIC_DRV_NAME);
 580 }
 581
 582 module_init(ionic_init_module);
 583 module_exit(ionic_cleanup_module);