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 *adminq = &lif->adminqcq->q; 185 186 spin_lock(&lif->adminq_lock); 187 188 while (adminq->tail != adminq->head) { 189 memset(adminq->tail->desc, 0, sizeof(union ionic_adminq_cmd)); 190 adminq->tail->cb = NULL; 191 adminq->tail->cb_arg = NULL; 192 adminq->tail = adminq->tail->next; 193 } 194 spin_unlock(&lif->adminq_lock); 195 } 196 197 static int ionic_adminq_check_err(struct ionic_lif *lif, 198 struct ionic_admin_ctx *ctx, 199 bool timeout) 200 { 201 struct net_device *netdev = lif->netdev; 202 const char *opcode_str; 203 const char *status_str; 204 int err = 0; 205 206 if (ctx->comp.comp.status || timeout) { 207 opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode); 208 status_str = ionic_error_to_str(ctx->comp.comp.status); 209 err = timeout ? -ETIMEDOUT : 210 ionic_error_to_errno(ctx->comp.comp.status); 211 212 netdev_err(netdev, "%s (%d) failed: %s (%d)\n", 213 opcode_str, ctx->cmd.cmd.opcode, 214 timeout ? "TIMEOUT" : status_str, err); 215 216 if (timeout) 217 ionic_adminq_flush(lif); 218 } 219 220 return err; 221 } 222 223 static void ionic_adminq_cb(struct ionic_queue *q, 224 struct ionic_desc_info *desc_info, 225 struct ionic_cq_info *cq_info, void *cb_arg) 226 { 227 struct ionic_admin_ctx *ctx = cb_arg; 228 struct ionic_admin_comp *comp; 229 struct device *dev; 230 231 if (!ctx) 232 return; 233 234 comp = cq_info->cq_desc; 235 dev = &q->lif->netdev->dev; 236 237 memcpy(&ctx->comp, comp, sizeof(*comp)); 238 239 dev_dbg(dev, "comp admin queue command:\n"); 240 dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1, 241 &ctx->comp, sizeof(ctx->comp), true); 242 243 complete_all(&ctx->work); 244 } 245 246 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx) 247 { 248 struct ionic_queue *adminq; 249 int err = 0; 250 251 WARN_ON(in_interrupt()); 252 253 if (!lif->adminqcq) 254 return -EIO; 255 256 adminq = &lif->adminqcq->q; 257 258 spin_lock(&lif->adminq_lock); 259 if (!ionic_q_has_space(adminq, 1)) { 260 err = -ENOSPC; 261 goto err_out; 262 } 263 264 err = ionic_heartbeat_check(lif->ionic); 265 if (err) 266 goto err_out; 267 268 memcpy(adminq->head->desc, &ctx->cmd, sizeof(ctx->cmd)); 269 270 dev_dbg(&lif->netdev->dev, "post admin queue command:\n"); 271 dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1, 272 &ctx->cmd, sizeof(ctx->cmd), true); 273 274 ionic_q_post(adminq, true, ionic_adminq_cb, ctx); 275 276 err_out: 277 spin_unlock(&lif->adminq_lock); 278 279 return err; 280 } 281 282 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx) 283 { 284 struct net_device *netdev = lif->netdev; 285 unsigned long remaining; 286 const char *name; 287 int err; 288 289 err = ionic_adminq_post(lif, ctx); 290 if (err) { 291 if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) { 292 name = ionic_opcode_to_str(ctx->cmd.cmd.opcode); 293 netdev_err(netdev, "Posting of %s (%d) failed: %d\n", 294 name, ctx->cmd.cmd.opcode, err); 295 } 296 return err; 297 } 298 299 remaining = wait_for_completion_timeout(&ctx->work, 300 HZ * (ulong)DEVCMD_TIMEOUT); 301 return ionic_adminq_check_err(lif, ctx, (remaining == 0)); 302 } 303 304 int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb, 305 ionic_cq_done_cb done_cb, void *done_arg) 306 { 307 struct ionic_qcq *qcq = napi_to_qcq(napi); 308 struct ionic_cq *cq = &qcq->cq; 309 u32 work_done, flags = 0; 310 311 work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg); 312 313 if (work_done < budget && napi_complete_done(napi, work_done)) { 314 flags |= IONIC_INTR_CRED_UNMASK; 315 DEBUG_STATS_INTR_REARM(cq->bound_intr); 316 } 317 318 if (work_done || flags) { 319 flags |= IONIC_INTR_CRED_RESET_COALESCE; 320 ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl, 321 cq->bound_intr->index, 322 work_done, flags); 323 } 324 325 DEBUG_STATS_NAPI_POLL(qcq, work_done); 326 327 return work_done; 328 } 329 330 static void ionic_dev_cmd_clean(struct ionic *ionic) 331 { 332 union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs; 333 334 iowrite32(0, ®s->doorbell); 335 memset_io(®s->cmd, 0, sizeof(regs->cmd)); 336 } 337 338 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds) 339 { 340 struct ionic_dev *idev = &ionic->idev; 341 unsigned long start_time; 342 unsigned long max_wait; 343 unsigned long duration; 344 int opcode; 345 int hb = 0; 346 int done; 347 int err; 348 349 WARN_ON(in_interrupt()); 350 351 /* Wait for dev cmd to complete, retrying if we get EAGAIN, 352 * but don't wait any longer than max_seconds. 353 */ 354 max_wait = jiffies + (max_seconds * HZ); 355 try_again: 356 start_time = jiffies; 357 do { 358 done = ionic_dev_cmd_done(idev); 359 if (done) 360 break; 361 msleep(5); 362 hb = ionic_heartbeat_check(ionic); 363 } while (!done && !hb && time_before(jiffies, max_wait)); 364 duration = jiffies - start_time; 365 366 opcode = idev->dev_cmd_regs->cmd.cmd.opcode; 367 dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n", 368 ionic_opcode_to_str(opcode), opcode, 369 done, duration / HZ, duration); 370 371 if (!done && hb) { 372 /* It is possible (but unlikely) that FW was busy and missed a 373 * heartbeat check but is still alive and will process this 374 * request, so don't clean the dev_cmd in this case. 375 */ 376 dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n", 377 ionic_opcode_to_str(opcode), opcode); 378 return -ENXIO; 379 } 380 381 if (!done && !time_before(jiffies, max_wait)) { 382 ionic_dev_cmd_clean(ionic); 383 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n", 384 ionic_opcode_to_str(opcode), opcode, max_seconds); 385 return -ETIMEDOUT; 386 } 387 388 err = ionic_dev_cmd_status(&ionic->idev); 389 if (err) { 390 if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) { 391 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n", 392 ionic_opcode_to_str(opcode), opcode, 393 ionic_error_to_str(err), err); 394 395 msleep(1000); 396 iowrite32(0, &idev->dev_cmd_regs->done); 397 iowrite32(1, &idev->dev_cmd_regs->doorbell); 398 goto try_again; 399 } 400 401 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n", 402 ionic_opcode_to_str(opcode), opcode, 403 ionic_error_to_str(err), err); 404 405 return ionic_error_to_errno(err); 406 } 407 408 return 0; 409 } 410 411 int ionic_setup(struct ionic *ionic) 412 { 413 int err; 414 415 err = ionic_dev_setup(ionic); 416 if (err) 417 return err; 418 ionic_reset(ionic); 419 420 return 0; 421 } 422 423 int ionic_identify(struct ionic *ionic) 424 { 425 struct ionic_identity *ident = &ionic->ident; 426 struct ionic_dev *idev = &ionic->idev; 427 size_t sz; 428 int err; 429 430 memset(ident, 0, sizeof(*ident)); 431 432 ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX); 433 strncpy(ident->drv.driver_ver_str, UTS_RELEASE, 434 sizeof(ident->drv.driver_ver_str) - 1); 435 436 mutex_lock(&ionic->dev_cmd_lock); 437 438 sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data)); 439 memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz); 440 441 ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1); 442 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 443 if (!err) { 444 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data)); 445 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz); 446 } 447 448 mutex_unlock(&ionic->dev_cmd_lock); 449 450 if (err) 451 goto err_out_unmap; 452 453 ionic_debugfs_add_ident(ionic); 454 455 return 0; 456 457 err_out_unmap: 458 return err; 459 } 460 461 int ionic_init(struct ionic *ionic) 462 { 463 struct ionic_dev *idev = &ionic->idev; 464 int err; 465 466 mutex_lock(&ionic->dev_cmd_lock); 467 ionic_dev_cmd_init(idev); 468 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 469 mutex_unlock(&ionic->dev_cmd_lock); 470 471 return err; 472 } 473 474 int ionic_reset(struct ionic *ionic) 475 { 476 struct ionic_dev *idev = &ionic->idev; 477 int err; 478 479 mutex_lock(&ionic->dev_cmd_lock); 480 ionic_dev_cmd_reset(idev); 481 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 482 mutex_unlock(&ionic->dev_cmd_lock); 483 484 return err; 485 } 486 487 int ionic_port_identify(struct ionic *ionic) 488 { 489 struct ionic_identity *ident = &ionic->ident; 490 struct ionic_dev *idev = &ionic->idev; 491 size_t sz; 492 int err; 493 494 mutex_lock(&ionic->dev_cmd_lock); 495 496 ionic_dev_cmd_port_identify(idev); 497 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 498 if (!err) { 499 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data)); 500 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz); 501 } 502 503 mutex_unlock(&ionic->dev_cmd_lock); 504 505 return err; 506 } 507 508 int ionic_port_init(struct ionic *ionic) 509 { 510 struct ionic_identity *ident = &ionic->ident; 511 struct ionic_dev *idev = &ionic->idev; 512 size_t sz; 513 int err; 514 515 if (!idev->port_info) { 516 idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE); 517 idev->port_info = dma_alloc_coherent(ionic->dev, 518 idev->port_info_sz, 519 &idev->port_info_pa, 520 GFP_KERNEL); 521 if (!idev->port_info) { 522 dev_err(ionic->dev, "Failed to allocate port info\n"); 523 return -ENOMEM; 524 } 525 } 526 527 sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data)); 528 529 mutex_lock(&ionic->dev_cmd_lock); 530 531 memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz); 532 ionic_dev_cmd_port_init(idev); 533 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 534 535 ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP); 536 (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 537 538 mutex_unlock(&ionic->dev_cmd_lock); 539 if (err) { 540 dev_err(ionic->dev, "Failed to init port\n"); 541 dma_free_coherent(ionic->dev, idev->port_info_sz, 542 idev->port_info, idev->port_info_pa); 543 idev->port_info = NULL; 544 idev->port_info_pa = 0; 545 } 546 547 return err; 548 } 549 550 int ionic_port_reset(struct ionic *ionic) 551 { 552 struct ionic_dev *idev = &ionic->idev; 553 int err; 554 555 if (!idev->port_info) 556 return 0; 557 558 mutex_lock(&ionic->dev_cmd_lock); 559 ionic_dev_cmd_port_reset(idev); 560 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 561 mutex_unlock(&ionic->dev_cmd_lock); 562 563 dma_free_coherent(ionic->dev, idev->port_info_sz, 564 idev->port_info, idev->port_info_pa); 565 566 idev->port_info = NULL; 567 idev->port_info_pa = 0; 568 569 if (err) 570 dev_err(ionic->dev, "Failed to reset port\n"); 571 572 return err; 573 } 574 575 static int __init ionic_init_module(void) 576 { 577 ionic_debugfs_create(); 578 return ionic_bus_register_driver(); 579 } 580 581 static void __exit ionic_cleanup_module(void) 582 { 583 ionic_bus_unregister_driver(); 584 ionic_debugfs_destroy(); 585 586 pr_info("%s removed\n", IONIC_DRV_NAME); 587 } 588 589 module_init(ionic_init_module); 590 module_exit(ionic_cleanup_module); 591