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, ®s->doorbell); 333 memset_io(®s->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); 588