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                 if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
 290                         name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 291                         netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
 292                                    name, ctx->cmd.cmd.opcode, err);
 293                 }
 294                 return err;
 295         }
 296
 297         remaining = wait_for_completion_timeout(&ctx->work,
 298                                                 HZ * (ulong)DEVCMD_TIMEOUT);
 299         return ionic_adminq_check_err(lif, ctx, (remaining == 0));
 300 }
 301
 302 int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb,
 303                ionic_cq_done_cb done_cb, void *done_arg)
 304 {
 305         struct ionic_qcq *qcq = napi_to_qcq(napi);
 306         struct ionic_cq *cq = &qcq->cq;
 307         u32 work_done, flags = 0;
 308
 309         work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg);
 310
 311         if (work_done < budget && napi_complete_done(napi, work_done)) {
 312                 flags |= IONIC_INTR_CRED_UNMASK;
 313                 DEBUG_STATS_INTR_REARM(cq->bound_intr);
 314         }
 315
 316         if (work_done || flags) {
 317                 flags |= IONIC_INTR_CRED_RESET_COALESCE;
 318                 ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl,
 319                                    cq->bound_intr->index,
 320                                    work_done, flags);
 321         }
 322
 323         DEBUG_STATS_NAPI_POLL(qcq, work_done);
 324
 325         return work_done;
 326 }
 327
 328 static void ionic_dev_cmd_clean(struct ionic *ionic)
 329 {
 330         union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
 331
 332         iowrite32(0, &regs->doorbell);
 333         memset_io(&regs->cmd, 0, sizeof(regs->cmd));
 334 }
 335
 336 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
 337 {
 338         struct ionic_dev *idev = &ionic->idev;
 339         unsigned long start_time;
 340         unsigned long max_wait;
 341         unsigned long duration;
 342         int opcode;
 343         int hb = 0;
 344         int done;
 345         int err;
 346
 347         WARN_ON(in_interrupt());
 348
 349         /* Wait for dev cmd to complete, retrying if we get EAGAIN,
 350          * but don't wait any longer than max_seconds.
 351          */
 352         max_wait = jiffies + (max_seconds * HZ);
 353 try_again:
 354         start_time = jiffies;
 355         do {
 356                 done = ionic_dev_cmd_done(idev);
 357                 if (done)
 358                         break;
 359                 msleep(20);
 360                 hb = ionic_heartbeat_check(ionic);
 361         } while (!done && !hb && time_before(jiffies, max_wait));
 362         duration = jiffies - start_time;
 363
 364         opcode = idev->dev_cmd_regs->cmd.cmd.opcode;
 365         dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
 366                 ionic_opcode_to_str(opcode), opcode,
 367                 done, duration / HZ, duration);
 368
 369         if (!done && hb) {
 370                 /* It is possible (but unlikely) that FW was busy and missed a
 371                  * heartbeat check but is still alive and will process this
 372                  * request, so don't clean the dev_cmd in this case.
 373                  */
 374                 dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
 375                          ionic_opcode_to_str(opcode), opcode);
 376                 return -ENXIO;
 377         }
 378
 379         if (!done && !time_before(jiffies, max_wait)) {
 380                 ionic_dev_cmd_clean(ionic);
 381                 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
 382                          ionic_opcode_to_str(opcode), opcode, max_seconds);
 383                 return -ETIMEDOUT;
 384         }
 385
 386         err = ionic_dev_cmd_status(&ionic->idev);
 387         if (err) {
 388                 if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) {
 389                         dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n",
 390                                 ionic_opcode_to_str(opcode), opcode,
 391                                 ionic_error_to_str(err), err);
 392
 393                         msleep(1000);
 394                         iowrite32(0, &idev->dev_cmd_regs->done);
 395                         iowrite32(1, &idev->dev_cmd_regs->doorbell);
 396                         goto try_again;
 397                 }
 398
 399                 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
 400                         ionic_opcode_to_str(opcode), opcode,
 401                         ionic_error_to_str(err), err);
 402
 403                 return ionic_error_to_errno(err);
 404         }
 405
 406         return 0;
 407 }
 408
 409 int ionic_setup(struct ionic *ionic)
 410 {
 411         int err;
 412
 413         err = ionic_dev_setup(ionic);
 414         if (err)
 415                 return err;
 416
 417         return 0;
 418 }
 419
 420 int ionic_identify(struct ionic *ionic)
 421 {
 422         struct ionic_identity *ident = &ionic->ident;
 423         struct ionic_dev *idev = &ionic->idev;
 424         size_t sz;
 425         int err;
 426
 427         memset(ident, 0, sizeof(*ident));
 428
 429         ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
 430         strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
 431                 sizeof(ident->drv.driver_ver_str) - 1);
 432
 433         mutex_lock(&ionic->dev_cmd_lock);
 434
 435         sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
 436         memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
 437
 438         ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
 439         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 440         if (!err) {
 441                 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
 442                 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
 443         }
 444
 445         mutex_unlock(&ionic->dev_cmd_lock);
 446
 447         if (err)
 448                 goto err_out_unmap;
 449
 450         ionic_debugfs_add_ident(ionic);
 451
 452         return 0;
 453
 454 err_out_unmap:
 455         return err;
 456 }
 457
 458 int ionic_init(struct ionic *ionic)
 459 {
 460         struct ionic_dev *idev = &ionic->idev;
 461         int err;
 462
 463         mutex_lock(&ionic->dev_cmd_lock);
 464         ionic_dev_cmd_init(idev);
 465         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 466         mutex_unlock(&ionic->dev_cmd_lock);
 467
 468         return err;
 469 }
 470
 471 int ionic_reset(struct ionic *ionic)
 472 {
 473         struct ionic_dev *idev = &ionic->idev;
 474         int err;
 475
 476         mutex_lock(&ionic->dev_cmd_lock);
 477         ionic_dev_cmd_reset(idev);
 478         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 479         mutex_unlock(&ionic->dev_cmd_lock);
 480
 481         return err;
 482 }
 483
 484 int ionic_port_identify(struct ionic *ionic)
 485 {
 486         struct ionic_identity *ident = &ionic->ident;
 487         struct ionic_dev *idev = &ionic->idev;
 488         size_t sz;
 489         int err;
 490
 491         mutex_lock(&ionic->dev_cmd_lock);
 492
 493         ionic_dev_cmd_port_identify(idev);
 494         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 495         if (!err) {
 496                 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
 497                 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
 498         }
 499
 500         mutex_unlock(&ionic->dev_cmd_lock);
 501
 502         return err;
 503 }
 504
 505 int ionic_port_init(struct ionic *ionic)
 506 {
 507         struct ionic_identity *ident = &ionic->ident;
 508         struct ionic_dev *idev = &ionic->idev;
 509         size_t sz;
 510         int err;
 511
 512         if (idev->port_info)
 513                 return 0;
 514
 515         idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
 516         idev->port_info = dma_alloc_coherent(ionic->dev, idev->port_info_sz,
 517                                              &idev->port_info_pa,
 518                                              GFP_KERNEL);
 519         if (!idev->port_info) {
 520                 dev_err(ionic->dev, "Failed to allocate port info, aborting\n");
 521                 return -ENOMEM;
 522         }
 523
 524         sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
 525
 526         mutex_lock(&ionic->dev_cmd_lock);
 527
 528         memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
 529         ionic_dev_cmd_port_init(idev);
 530         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 531
 532         ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
 533         (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 534
 535         mutex_unlock(&ionic->dev_cmd_lock);
 536         if (err) {
 537                 dev_err(ionic->dev, "Failed to init port\n");
 538                 dma_free_coherent(ionic->dev, idev->port_info_sz,
 539                                   idev->port_info, idev->port_info_pa);
 540                 idev->port_info = NULL;
 541                 idev->port_info_pa = 0;
 542         }
 543
 544         return err;
 545 }
 546
 547 int ionic_port_reset(struct ionic *ionic)
 548 {
 549         struct ionic_dev *idev = &ionic->idev;
 550         int err;
 551
 552         if (!idev->port_info)
 553                 return 0;
 554
 555         mutex_lock(&ionic->dev_cmd_lock);
 556         ionic_dev_cmd_port_reset(idev);
 557         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 558         mutex_unlock(&ionic->dev_cmd_lock);
 559
 560         dma_free_coherent(ionic->dev, idev->port_info_sz,
 561                           idev->port_info, idev->port_info_pa);
 562
 563         idev->port_info = NULL;
 564         idev->port_info_pa = 0;
 565
 566         if (err)
 567                 dev_err(ionic->dev, "Failed to reset port\n");
 568
 569         return err;
 570 }
 571
 572 static int __init ionic_init_module(void)
 573 {
 574         ionic_debugfs_create();
 575         return ionic_bus_register_driver();
 576 }
 577
 578 static void __exit ionic_cleanup_module(void)
 579 {
 580         ionic_bus_unregister_driver();
 581         ionic_debugfs_destroy();
 582
 583         pr_info("%s removed\n", IONIC_DRV_NAME);
 584 }
 585
 586 module_init(ionic_init_module);
 587 module_exit(ionic_cleanup_module);