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