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