1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2017 - 2019 Pensando Systems, Inc */ 3 4 #include <linux/module.h> 5 #include <linux/netdevice.h> 6 #include <linux/utsname.h> 7 8 #include "ionic.h" 9 #include "ionic_bus.h" 10 #include "ionic_lif.h" 11 #include "ionic_debugfs.h" 12 13 MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION); 14 MODULE_AUTHOR("Pensando Systems, Inc"); 15 MODULE_LICENSE("GPL"); 16 MODULE_VERSION(IONIC_DRV_VERSION); 17 18 static const char *ionic_error_to_str(enum ionic_status_code code) 19 { 20 switch (code) { 21 case IONIC_RC_SUCCESS: 22 return "IONIC_RC_SUCCESS"; 23 case IONIC_RC_EVERSION: 24 return "IONIC_RC_EVERSION"; 25 case IONIC_RC_EOPCODE: 26 return "IONIC_RC_EOPCODE"; 27 case IONIC_RC_EIO: 28 return "IONIC_RC_EIO"; 29 case IONIC_RC_EPERM: 30 return "IONIC_RC_EPERM"; 31 case IONIC_RC_EQID: 32 return "IONIC_RC_EQID"; 33 case IONIC_RC_EQTYPE: 34 return "IONIC_RC_EQTYPE"; 35 case IONIC_RC_ENOENT: 36 return "IONIC_RC_ENOENT"; 37 case IONIC_RC_EINTR: 38 return "IONIC_RC_EINTR"; 39 case IONIC_RC_EAGAIN: 40 return "IONIC_RC_EAGAIN"; 41 case IONIC_RC_ENOMEM: 42 return "IONIC_RC_ENOMEM"; 43 case IONIC_RC_EFAULT: 44 return "IONIC_RC_EFAULT"; 45 case IONIC_RC_EBUSY: 46 return "IONIC_RC_EBUSY"; 47 case IONIC_RC_EEXIST: 48 return "IONIC_RC_EEXIST"; 49 case IONIC_RC_EINVAL: 50 return "IONIC_RC_EINVAL"; 51 case IONIC_RC_ENOSPC: 52 return "IONIC_RC_ENOSPC"; 53 case IONIC_RC_ERANGE: 54 return "IONIC_RC_ERANGE"; 55 case IONIC_RC_BAD_ADDR: 56 return "IONIC_RC_BAD_ADDR"; 57 case IONIC_RC_DEV_CMD: 58 return "IONIC_RC_DEV_CMD"; 59 case IONIC_RC_ERROR: 60 return "IONIC_RC_ERROR"; 61 case IONIC_RC_ERDMA: 62 return "IONIC_RC_ERDMA"; 63 default: 64 return "IONIC_RC_UNKNOWN"; 65 } 66 } 67 68 static int ionic_error_to_errno(enum ionic_status_code code) 69 { 70 switch (code) { 71 case IONIC_RC_SUCCESS: 72 return 0; 73 case IONIC_RC_EVERSION: 74 case IONIC_RC_EQTYPE: 75 case IONIC_RC_EQID: 76 case IONIC_RC_EINVAL: 77 return -EINVAL; 78 case IONIC_RC_EPERM: 79 return -EPERM; 80 case IONIC_RC_ENOENT: 81 return -ENOENT; 82 case IONIC_RC_EAGAIN: 83 return -EAGAIN; 84 case IONIC_RC_ENOMEM: 85 return -ENOMEM; 86 case IONIC_RC_EFAULT: 87 return -EFAULT; 88 case IONIC_RC_EBUSY: 89 return -EBUSY; 90 case IONIC_RC_EEXIST: 91 return -EEXIST; 92 case IONIC_RC_ENOSPC: 93 return -ENOSPC; 94 case IONIC_RC_ERANGE: 95 return -ERANGE; 96 case IONIC_RC_BAD_ADDR: 97 return -EFAULT; 98 case IONIC_RC_EOPCODE: 99 case IONIC_RC_EINTR: 100 case IONIC_RC_DEV_CMD: 101 case IONIC_RC_ERROR: 102 case IONIC_RC_ERDMA: 103 case IONIC_RC_EIO: 104 default: 105 return -EIO; 106 } 107 } 108 109 static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode) 110 { 111 switch (opcode) { 112 case IONIC_CMD_NOP: 113 return "IONIC_CMD_NOP"; 114 case IONIC_CMD_INIT: 115 return "IONIC_CMD_INIT"; 116 case IONIC_CMD_RESET: 117 return "IONIC_CMD_RESET"; 118 case IONIC_CMD_IDENTIFY: 119 return "IONIC_CMD_IDENTIFY"; 120 case IONIC_CMD_GETATTR: 121 return "IONIC_CMD_GETATTR"; 122 case IONIC_CMD_SETATTR: 123 return "IONIC_CMD_SETATTR"; 124 case IONIC_CMD_PORT_IDENTIFY: 125 return "IONIC_CMD_PORT_IDENTIFY"; 126 case IONIC_CMD_PORT_INIT: 127 return "IONIC_CMD_PORT_INIT"; 128 case IONIC_CMD_PORT_RESET: 129 return "IONIC_CMD_PORT_RESET"; 130 case IONIC_CMD_PORT_GETATTR: 131 return "IONIC_CMD_PORT_GETATTR"; 132 case IONIC_CMD_PORT_SETATTR: 133 return "IONIC_CMD_PORT_SETATTR"; 134 case IONIC_CMD_LIF_INIT: 135 return "IONIC_CMD_LIF_INIT"; 136 case IONIC_CMD_LIF_RESET: 137 return "IONIC_CMD_LIF_RESET"; 138 case IONIC_CMD_LIF_IDENTIFY: 139 return "IONIC_CMD_LIF_IDENTIFY"; 140 case IONIC_CMD_LIF_SETATTR: 141 return "IONIC_CMD_LIF_SETATTR"; 142 case IONIC_CMD_LIF_GETATTR: 143 return "IONIC_CMD_LIF_GETATTR"; 144 case IONIC_CMD_RX_MODE_SET: 145 return "IONIC_CMD_RX_MODE_SET"; 146 case IONIC_CMD_RX_FILTER_ADD: 147 return "IONIC_CMD_RX_FILTER_ADD"; 148 case IONIC_CMD_RX_FILTER_DEL: 149 return "IONIC_CMD_RX_FILTER_DEL"; 150 case IONIC_CMD_Q_INIT: 151 return "IONIC_CMD_Q_INIT"; 152 case IONIC_CMD_Q_CONTROL: 153 return "IONIC_CMD_Q_CONTROL"; 154 case IONIC_CMD_RDMA_RESET_LIF: 155 return "IONIC_CMD_RDMA_RESET_LIF"; 156 case IONIC_CMD_RDMA_CREATE_EQ: 157 return "IONIC_CMD_RDMA_CREATE_EQ"; 158 case IONIC_CMD_RDMA_CREATE_CQ: 159 return "IONIC_CMD_RDMA_CREATE_CQ"; 160 case IONIC_CMD_RDMA_CREATE_ADMINQ: 161 return "IONIC_CMD_RDMA_CREATE_ADMINQ"; 162 case IONIC_CMD_FW_DOWNLOAD: 163 return "IONIC_CMD_FW_DOWNLOAD"; 164 case IONIC_CMD_FW_CONTROL: 165 return "IONIC_CMD_FW_CONTROL"; 166 default: 167 return "DEVCMD_UNKNOWN"; 168 } 169 } 170 171 static void ionic_adminq_flush(struct ionic_lif *lif) 172 { 173 struct ionic_queue *adminq = &lif->adminqcq->q; 174 175 spin_lock(&lif->adminq_lock); 176 177 while (adminq->tail != adminq->head) { 178 memset(adminq->tail->desc, 0, sizeof(union ionic_adminq_cmd)); 179 adminq->tail->cb = NULL; 180 adminq->tail->cb_arg = NULL; 181 adminq->tail = adminq->tail->next; 182 } 183 spin_unlock(&lif->adminq_lock); 184 } 185 186 static int ionic_adminq_check_err(struct ionic_lif *lif, 187 struct ionic_admin_ctx *ctx, 188 bool timeout) 189 { 190 struct net_device *netdev = lif->netdev; 191 const char *opcode_str; 192 const char *status_str; 193 int err = 0; 194 195 if (ctx->comp.comp.status || timeout) { 196 opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode); 197 status_str = ionic_error_to_str(ctx->comp.comp.status); 198 err = timeout ? -ETIMEDOUT : 199 ionic_error_to_errno(ctx->comp.comp.status); 200 201 netdev_err(netdev, "%s (%d) failed: %s (%d)\n", 202 opcode_str, ctx->cmd.cmd.opcode, 203 timeout ? "TIMEOUT" : status_str, err); 204 205 if (timeout) 206 ionic_adminq_flush(lif); 207 } 208 209 return err; 210 } 211 212 static void ionic_adminq_cb(struct ionic_queue *q, 213 struct ionic_desc_info *desc_info, 214 struct ionic_cq_info *cq_info, void *cb_arg) 215 { 216 struct ionic_admin_ctx *ctx = cb_arg; 217 struct ionic_admin_comp *comp; 218 struct device *dev; 219 220 if (!ctx) 221 return; 222 223 comp = cq_info->cq_desc; 224 dev = &q->lif->netdev->dev; 225 226 memcpy(&ctx->comp, comp, sizeof(*comp)); 227 228 dev_dbg(dev, "comp admin queue command:\n"); 229 dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1, 230 &ctx->comp, sizeof(ctx->comp), true); 231 232 complete_all(&ctx->work); 233 } 234 235 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx) 236 { 237 struct ionic_queue *adminq = &lif->adminqcq->q; 238 int err = 0; 239 240 WARN_ON(in_interrupt()); 241 242 spin_lock(&lif->adminq_lock); 243 if (!ionic_q_has_space(adminq, 1)) { 244 err = -ENOSPC; 245 goto err_out; 246 } 247 248 memcpy(adminq->head->desc, &ctx->cmd, sizeof(ctx->cmd)); 249 250 dev_dbg(&lif->netdev->dev, "post admin queue command:\n"); 251 dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1, 252 &ctx->cmd, sizeof(ctx->cmd), true); 253 254 ionic_q_post(adminq, true, ionic_adminq_cb, ctx); 255 256 err_out: 257 spin_unlock(&lif->adminq_lock); 258 259 return err; 260 } 261 262 int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx) 263 { 264 struct net_device *netdev = lif->netdev; 265 unsigned long remaining; 266 const char *name; 267 int err; 268 269 err = ionic_adminq_post(lif, ctx); 270 if (err) { 271 name = ionic_opcode_to_str(ctx->cmd.cmd.opcode); 272 netdev_err(netdev, "Posting of %s (%d) failed: %d\n", 273 name, ctx->cmd.cmd.opcode, err); 274 return err; 275 } 276 277 remaining = wait_for_completion_timeout(&ctx->work, 278 HZ * (ulong)DEVCMD_TIMEOUT); 279 return ionic_adminq_check_err(lif, ctx, (remaining == 0)); 280 } 281 282 int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb, 283 ionic_cq_done_cb done_cb, void *done_arg) 284 { 285 struct ionic_qcq *qcq = napi_to_qcq(napi); 286 struct ionic_cq *cq = &qcq->cq; 287 u32 work_done, flags = 0; 288 289 work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg); 290 291 if (work_done < budget && napi_complete_done(napi, work_done)) { 292 flags |= IONIC_INTR_CRED_UNMASK; 293 DEBUG_STATS_INTR_REARM(cq->bound_intr); 294 } 295 296 if (work_done || flags) { 297 flags |= IONIC_INTR_CRED_RESET_COALESCE; 298 ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl, 299 cq->bound_intr->index, 300 work_done, flags); 301 } 302 303 DEBUG_STATS_NAPI_POLL(qcq, work_done); 304 305 return work_done; 306 } 307 308 int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds) 309 { 310 struct ionic_dev *idev = &ionic->idev; 311 unsigned long start_time; 312 unsigned long max_wait; 313 unsigned long duration; 314 int opcode; 315 int done; 316 int err; 317 318 WARN_ON(in_interrupt()); 319 320 /* Wait for dev cmd to complete, retrying if we get EAGAIN, 321 * but don't wait any longer than max_seconds. 322 */ 323 max_wait = jiffies + (max_seconds * HZ); 324 try_again: 325 start_time = jiffies; 326 do { 327 done = ionic_dev_cmd_done(idev); 328 if (done) 329 break; 330 msleep(20); 331 } while (!done && time_before(jiffies, max_wait)); 332 duration = jiffies - start_time; 333 334 opcode = idev->dev_cmd_regs->cmd.cmd.opcode; 335 dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n", 336 ionic_opcode_to_str(opcode), opcode, 337 done, duration / HZ, duration); 338 339 if (!done && !time_before(jiffies, max_wait)) { 340 dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n", 341 ionic_opcode_to_str(opcode), opcode, max_seconds); 342 return -ETIMEDOUT; 343 } 344 345 err = ionic_dev_cmd_status(&ionic->idev); 346 if (err) { 347 if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) { 348 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n", 349 ionic_opcode_to_str(opcode), opcode, 350 ionic_error_to_str(err), err); 351 352 msleep(1000); 353 iowrite32(0, &idev->dev_cmd_regs->done); 354 iowrite32(1, &idev->dev_cmd_regs->doorbell); 355 goto try_again; 356 } 357 358 dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n", 359 ionic_opcode_to_str(opcode), opcode, 360 ionic_error_to_str(err), err); 361 362 return ionic_error_to_errno(err); 363 } 364 365 return 0; 366 } 367 368 int ionic_setup(struct ionic *ionic) 369 { 370 int err; 371 372 err = ionic_dev_setup(ionic); 373 if (err) 374 return err; 375 376 return 0; 377 } 378 379 int ionic_identify(struct ionic *ionic) 380 { 381 struct ionic_identity *ident = &ionic->ident; 382 struct ionic_dev *idev = &ionic->idev; 383 size_t sz; 384 int err; 385 386 memset(ident, 0, sizeof(*ident)); 387 388 ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX); 389 strncpy(ident->drv.driver_ver_str, IONIC_DRV_VERSION, 390 sizeof(ident->drv.driver_ver_str) - 1); 391 392 mutex_lock(&ionic->dev_cmd_lock); 393 394 sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data)); 395 memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz); 396 397 ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1); 398 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 399 if (!err) { 400 sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data)); 401 memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz); 402 } 403 404 mutex_unlock(&ionic->dev_cmd_lock); 405 406 if (err) 407 goto err_out_unmap; 408 409 ionic_debugfs_add_ident(ionic); 410 411 return 0; 412 413 err_out_unmap: 414 return err; 415 } 416 417 int ionic_init(struct ionic *ionic) 418 { 419 struct ionic_dev *idev = &ionic->idev; 420 int err; 421 422 mutex_lock(&ionic->dev_cmd_lock); 423 ionic_dev_cmd_init(idev); 424 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 425 mutex_unlock(&ionic->dev_cmd_lock); 426 427 return err; 428 } 429 430 int ionic_reset(struct ionic *ionic) 431 { 432 struct ionic_dev *idev = &ionic->idev; 433 int err; 434 435 mutex_lock(&ionic->dev_cmd_lock); 436 ionic_dev_cmd_reset(idev); 437 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 438 mutex_unlock(&ionic->dev_cmd_lock); 439 440 return err; 441 } 442 443 int ionic_port_identify(struct ionic *ionic) 444 { 445 struct ionic_identity *ident = &ionic->ident; 446 struct ionic_dev *idev = &ionic->idev; 447 size_t sz; 448 int err; 449 450 mutex_lock(&ionic->dev_cmd_lock); 451 452 ionic_dev_cmd_port_identify(idev); 453 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 454 if (!err) { 455 sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data)); 456 memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz); 457 } 458 459 mutex_unlock(&ionic->dev_cmd_lock); 460 461 return err; 462 } 463 464 int ionic_port_init(struct ionic *ionic) 465 { 466 struct ionic_identity *ident = &ionic->ident; 467 struct ionic_dev *idev = &ionic->idev; 468 size_t sz; 469 int err; 470 471 if (idev->port_info) 472 return 0; 473 474 idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE); 475 idev->port_info = dma_alloc_coherent(ionic->dev, idev->port_info_sz, 476 &idev->port_info_pa, 477 GFP_KERNEL); 478 if (!idev->port_info) { 479 dev_err(ionic->dev, "Failed to allocate port info, aborting\n"); 480 return -ENOMEM; 481 } 482 483 sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data)); 484 485 mutex_lock(&ionic->dev_cmd_lock); 486 487 memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz); 488 ionic_dev_cmd_port_init(idev); 489 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 490 491 ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP); 492 (void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 493 494 mutex_unlock(&ionic->dev_cmd_lock); 495 if (err) { 496 dev_err(ionic->dev, "Failed to init port\n"); 497 dma_free_coherent(ionic->dev, idev->port_info_sz, 498 idev->port_info, idev->port_info_pa); 499 idev->port_info = NULL; 500 idev->port_info_pa = 0; 501 } 502 503 return err; 504 } 505 506 int ionic_port_reset(struct ionic *ionic) 507 { 508 struct ionic_dev *idev = &ionic->idev; 509 int err; 510 511 if (!idev->port_info) 512 return 0; 513 514 mutex_lock(&ionic->dev_cmd_lock); 515 ionic_dev_cmd_port_reset(idev); 516 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT); 517 mutex_unlock(&ionic->dev_cmd_lock); 518 519 dma_free_coherent(ionic->dev, idev->port_info_sz, 520 idev->port_info, idev->port_info_pa); 521 522 idev->port_info = NULL; 523 idev->port_info_pa = 0; 524 525 if (err) 526 dev_err(ionic->dev, "Failed to reset port\n"); 527 528 return err; 529 } 530 531 static int __init ionic_init_module(void) 532 { 533 pr_info("%s %s, ver %s\n", 534 IONIC_DRV_NAME, IONIC_DRV_DESCRIPTION, IONIC_DRV_VERSION); 535 ionic_debugfs_create(); 536 return ionic_bus_register_driver(); 537 } 538 539 static void __exit ionic_cleanup_module(void) 540 { 541 ionic_bus_unregister_driver(); 542 ionic_debugfs_destroy(); 543 544 pr_info("%s removed\n", IONIC_DRV_NAME); 545 } 546 547 module_init(ionic_init_module); 548 module_exit(ionic_cleanup_module); 549