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         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_IDENTIFY:
 156                 return "IONIC_CMD_Q_IDENTIFY";
 157         case IONIC_CMD_Q_INIT:
 158                 return "IONIC_CMD_Q_INIT";
 159         case IONIC_CMD_Q_CONTROL:
 160                 return "IONIC_CMD_Q_CONTROL";
 161         case IONIC_CMD_RDMA_RESET_LIF:
 162                 return "IONIC_CMD_RDMA_RESET_LIF";
 163         case IONIC_CMD_RDMA_CREATE_EQ:
 164                 return "IONIC_CMD_RDMA_CREATE_EQ";
 165         case IONIC_CMD_RDMA_CREATE_CQ:
 166                 return "IONIC_CMD_RDMA_CREATE_CQ";
 167         case IONIC_CMD_RDMA_CREATE_ADMINQ:
 168                 return "IONIC_CMD_RDMA_CREATE_ADMINQ";
 169         case IONIC_CMD_FW_DOWNLOAD:
 170                 return "IONIC_CMD_FW_DOWNLOAD";
 171         case IONIC_CMD_FW_CONTROL:
 172                 return "IONIC_CMD_FW_CONTROL";
 173         case IONIC_CMD_VF_GETATTR:
 174                 return "IONIC_CMD_VF_GETATTR";
 175         case IONIC_CMD_VF_SETATTR:
 176                 return "IONIC_CMD_VF_SETATTR";
 177         default:
 178                 return "DEVCMD_UNKNOWN";
 179         }
 180 }
 181
 182 static void ionic_adminq_flush(struct ionic_lif *lif)
 183 {
 184         struct ionic_queue *q = &lif->adminqcq->q;
 185         struct ionic_desc_info *desc_info;
 186
 187         spin_lock(&lif->adminq_lock);
 188
 189         while (q->tail_idx != q->head_idx) {
 190                 desc_info = &q->info[q->tail_idx];
 191                 memset(desc_info->desc, 0, sizeof(union ionic_adminq_cmd));
 192                 desc_info->cb = NULL;
 193                 desc_info->cb_arg = NULL;
 194                 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 195         }
 196         spin_unlock(&lif->adminq_lock);
 197 }
 198
 199 static int ionic_adminq_check_err(struct ionic_lif *lif,
 200                                   struct ionic_admin_ctx *ctx,
 201                                   bool timeout)
 202 {
 203         struct net_device *netdev = lif->netdev;
 204         const char *opcode_str;
 205         const char *status_str;
 206         int err = 0;
 207
 208         if (ctx->comp.comp.status || timeout) {
 209                 opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 210                 status_str = ionic_error_to_str(ctx->comp.comp.status);
 211                 err = timeout ? -ETIMEDOUT :
 212                                 ionic_error_to_errno(ctx->comp.comp.status);
 213
 214                 netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
 215                            opcode_str, ctx->cmd.cmd.opcode,
 216                            timeout ? "TIMEOUT" : status_str, err);
 217
 218                 if (timeout)
 219                         ionic_adminq_flush(lif);
 220         }
 221
 222         return err;
 223 }
 224
 225 static void ionic_adminq_cb(struct ionic_queue *q,
 226                             struct ionic_desc_info *desc_info,
 227                             struct ionic_cq_info *cq_info, void *cb_arg)
 228 {
 229         struct ionic_admin_ctx *ctx = cb_arg;
 230         struct ionic_admin_comp *comp;
 231         struct device *dev;
 232
 233         if (!ctx)
 234                 return;
 235
 236         comp = cq_info->cq_desc;
 237         dev = &q->lif->netdev->dev;
 238
 239         memcpy(&ctx->comp, comp, sizeof(*comp));
 240
 241         dev_dbg(dev, "comp admin queue command:\n");
 242         dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
 243                          &ctx->comp, sizeof(ctx->comp), true);
 244
 245         complete_all(&ctx->work);
 246 }
 247
 248 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 249 {
 250         struct ionic_desc_info *desc_info;
 251         struct ionic_queue *q;
 252         int err = 0;
 253
 254         WARN_ON(in_interrupt());
 255
 256         if (!lif->adminqcq)
 257                 return -EIO;
 258
 259         q = &lif->adminqcq->q;
 260
 261         spin_lock(&lif->adminq_lock);
 262         if (!ionic_q_has_space(q, 1)) {
 263                 err = -ENOSPC;
 264                 goto err_out;
 265         }
 266
 267         err = ionic_heartbeat_check(lif->ionic);
 268         if (err)
 269                 goto err_out;
 270
 271         desc_info = &q->info[q->head_idx];
 272         memcpy(desc_info->desc, &ctx->cmd, sizeof(ctx->cmd));
 273
 274         dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
 275         dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
 276                          &ctx->cmd, sizeof(ctx->cmd), true);
 277
 278         ionic_q_post(q, true, ionic_adminq_cb, ctx);
 279
 280 err_out:
 281         spin_unlock(&lif->adminq_lock);
 282
 283         return err;
 284 }
 285
 286 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 287 {
 288         struct net_device *netdev = lif->netdev;
 289         unsigned long remaining;
 290         const char *name;
 291         int err;
 292
 293         err = ionic_adminq_post(lif, ctx);
 294         if (err) {
 295                 if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
 296                         name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
 297                         netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
 298                                    name, ctx->cmd.cmd.opcode, err);
 299                 }
 300                 return err;
 301         }
 302
 303         remaining = wait_for_completion_timeout(&ctx->work,
 304                                                 HZ * (ulong)DEVCMD_TIMEOUT);
 305         return ionic_adminq_check_err(lif, ctx, (remaining == 0));
 306 }
 307
 308 static void ionic_dev_cmd_clean(struct ionic *ionic)
 309 {
 310         union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
 311
 312         iowrite32(0, &regs->doorbell);
 313         memset_io(&regs->cmd, 0, sizeof(regs->cmd));
 314 }
 315
 316 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
 317 {
 318         struct ionic_dev *idev = &ionic->idev;
 319         unsigned long start_time;
 320         unsigned long max_wait;
 321         unsigned long duration;
 322         int opcode;
 323         int hb = 0;
 324         int done;
 325         int err;
 326
 327         WARN_ON(in_interrupt());
 328
 329         /* Wait for dev cmd to complete, retrying if we get EAGAIN,
 330          * but don't wait any longer than max_seconds.
 331          */
 332         max_wait = jiffies + (max_seconds * HZ);
 333 try_again:
 334         start_time = jiffies;
 335         do {
 336                 done = ionic_dev_cmd_done(idev);
 337                 if (done)
 338                         break;
 339                 msleep(5);
 340                 hb = ionic_heartbeat_check(ionic);
 341         } while (!done && !hb && time_before(jiffies, max_wait));
 342         duration = jiffies - start_time;
 343
 344         opcode = idev->dev_cmd_regs->cmd.cmd.opcode;
 345         dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
 346                 ionic_opcode_to_str(opcode), opcode,
 347                 done, duration / HZ, duration);
 348
 349         if (!done && hb) {
 350                 /* It is possible (but unlikely) that FW was busy and missed a
 351                  * heartbeat check but is still alive and will process this
 352                  * request, so don't clean the dev_cmd in this case.
 353                  */
 354                 dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
 355                          ionic_opcode_to_str(opcode), opcode);
 356                 return -ENXIO;
 357         }
 358
 359         if (!done && !time_before(jiffies, max_wait)) {
 360                 ionic_dev_cmd_clean(ionic);
 361                 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
 362                          ionic_opcode_to_str(opcode), opcode, max_seconds);
 363                 return -ETIMEDOUT;
 364         }
 365
 366         err = ionic_dev_cmd_status(&ionic->idev);
 367         if (err) {
 368                 if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) {
 369                         dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n",
 370                                 ionic_opcode_to_str(opcode), opcode,
 371                                 ionic_error_to_str(err), err);
 372
 373                         msleep(1000);
 374                         iowrite32(0, &idev->dev_cmd_regs->done);
 375                         iowrite32(1, &idev->dev_cmd_regs->doorbell);
 376                         goto try_again;
 377                 }
 378
 379                 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
 380                         ionic_opcode_to_str(opcode), opcode,
 381                         ionic_error_to_str(err), err);
 382
 383                 return ionic_error_to_errno(err);
 384         }
 385
 386         return 0;
 387 }
 388
 389 int ionic_setup(struct ionic *ionic)
 390 {
 391         int err;
 392
 393         err = ionic_dev_setup(ionic);
 394         if (err)
 395                 return err;
 396         ionic_reset(ionic);
 397
 398         return 0;
 399 }
 400
 401 int ionic_identify(struct ionic *ionic)
 402 {
 403         struct ionic_identity *ident = &ionic->ident;
 404         struct ionic_dev *idev = &ionic->idev;
 405         size_t sz;
 406         int err;
 407
 408         memset(ident, 0, sizeof(*ident));
 409
 410         ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
 411         strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
 412                 sizeof(ident->drv.driver_ver_str) - 1);
 413
 414         mutex_lock(&ionic->dev_cmd_lock);
 415
 416         sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
 417         memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
 418
 419         ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
 420         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 421         if (!err) {
 422                 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
 423                 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
 424         }
 425
 426         mutex_unlock(&ionic->dev_cmd_lock);
 427
 428         if (err)
 429                 goto err_out_unmap;
 430
 431         ionic_debugfs_add_ident(ionic);
 432
 433         return 0;
 434
 435 err_out_unmap:
 436         return err;
 437 }
 438
 439 int ionic_init(struct ionic *ionic)
 440 {
 441         struct ionic_dev *idev = &ionic->idev;
 442         int err;
 443
 444         mutex_lock(&ionic->dev_cmd_lock);
 445         ionic_dev_cmd_init(idev);
 446         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 447         mutex_unlock(&ionic->dev_cmd_lock);
 448
 449         return err;
 450 }
 451
 452 int ionic_reset(struct ionic *ionic)
 453 {
 454         struct ionic_dev *idev = &ionic->idev;
 455         int err;
 456
 457         mutex_lock(&ionic->dev_cmd_lock);
 458         ionic_dev_cmd_reset(idev);
 459         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 460         mutex_unlock(&ionic->dev_cmd_lock);
 461
 462         return err;
 463 }
 464
 465 int ionic_port_identify(struct ionic *ionic)
 466 {
 467         struct ionic_identity *ident = &ionic->ident;
 468         struct ionic_dev *idev = &ionic->idev;
 469         size_t sz;
 470         int err;
 471
 472         mutex_lock(&ionic->dev_cmd_lock);
 473
 474         ionic_dev_cmd_port_identify(idev);
 475         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 476         if (!err) {
 477                 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
 478                 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
 479         }
 480
 481         mutex_unlock(&ionic->dev_cmd_lock);
 482
 483         return err;
 484 }
 485
 486 int ionic_port_init(struct ionic *ionic)
 487 {
 488         struct ionic_identity *ident = &ionic->ident;
 489         struct ionic_dev *idev = &ionic->idev;
 490         size_t sz;
 491         int err;
 492
 493         if (!idev->port_info) {
 494                 idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
 495                 idev->port_info = dma_alloc_coherent(ionic->dev,
 496                                                      idev->port_info_sz,
 497                                                      &idev->port_info_pa,
 498                                                      GFP_KERNEL);
 499                 if (!idev->port_info) {
 500                         dev_err(ionic->dev, "Failed to allocate port info\n");
 501                         return -ENOMEM;
 502                 }
 503         }
 504
 505         sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
 506
 507         mutex_lock(&ionic->dev_cmd_lock);
 508
 509         memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
 510         ionic_dev_cmd_port_init(idev);
 511         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 512
 513         ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
 514         (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 515
 516         mutex_unlock(&ionic->dev_cmd_lock);
 517         if (err) {
 518                 dev_err(ionic->dev, "Failed to init port\n");
 519                 dma_free_coherent(ionic->dev, idev->port_info_sz,
 520                                   idev->port_info, idev->port_info_pa);
 521                 idev->port_info = NULL;
 522                 idev->port_info_pa = 0;
 523         }
 524
 525         return err;
 526 }
 527
 528 int ionic_port_reset(struct ionic *ionic)
 529 {
 530         struct ionic_dev *idev = &ionic->idev;
 531         int err;
 532
 533         if (!idev->port_info)
 534                 return 0;
 535
 536         mutex_lock(&ionic->dev_cmd_lock);
 537         ionic_dev_cmd_port_reset(idev);
 538         err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 539         mutex_unlock(&ionic->dev_cmd_lock);
 540
 541         dma_free_coherent(ionic->dev, idev->port_info_sz,
 542                           idev->port_info, idev->port_info_pa);
 543
 544         idev->port_info = NULL;
 545         idev->port_info_pa = 0;
 546
 547         if (err)
 548                 dev_err(ionic->dev, "Failed to reset port\n");
 549
 550         return err;
 551 }
 552
 553 static int __init ionic_init_module(void)
 554 {
 555         ionic_debugfs_create();
 556         return ionic_bus_register_driver();
 557 }
 558
 559 static void __exit ionic_cleanup_module(void)
 560 {
 561         ionic_bus_unregister_driver();
 562         ionic_debugfs_destroy();
 563
 564         pr_info("%s removed\n", IONIC_DRV_NAME);
 565 }
 566
 567 module_init(ionic_init_module);
 568 module_exit(ionic_cleanup_module);