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, ®s->doorbell); 313 memset_io(®s->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); 569