1 /* 2 * This file is part of the Chelsio FCoE driver for Linux. 3 * 4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 36 37 #include <linux/kernel.h> 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/pci.h> 41 #include <linux/aer.h> 42 #include <linux/mm.h> 43 #include <linux/notifier.h> 44 #include <linux/kdebug.h> 45 #include <linux/seq_file.h> 46 #include <linux/debugfs.h> 47 #include <linux/string.h> 48 #include <linux/export.h> 49 50 #include "csio_init.h" 51 #include "csio_defs.h" 52 53 #define CSIO_MIN_MEMPOOL_SZ 64 54 55 static struct dentry *csio_debugfs_root; 56 57 static struct scsi_transport_template *csio_fcoe_transport; 58 static struct scsi_transport_template *csio_fcoe_transport_vport; 59 60 /* 61 * debugfs support 62 */ 63 static ssize_t 64 csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) 65 { 66 loff_t pos = *ppos; 67 loff_t avail = file_inode(file)->i_size; 68 unsigned int mem = (uintptr_t)file->private_data & 3; 69 struct csio_hw *hw = file->private_data - mem; 70 71 if (pos < 0) 72 return -EINVAL; 73 if (pos >= avail) 74 return 0; 75 if (count > avail - pos) 76 count = avail - pos; 77 78 while (count) { 79 size_t len; 80 int ret, ofst; 81 __be32 data[16]; 82 83 if (mem == MEM_MC) 84 ret = csio_hw_mc_read(hw, pos, data, NULL); 85 else 86 ret = csio_hw_edc_read(hw, mem, pos, data, NULL); 87 if (ret) 88 return ret; 89 90 ofst = pos % sizeof(data); 91 len = min(count, sizeof(data) - ofst); 92 if (copy_to_user(buf, (u8 *)data + ofst, len)) 93 return -EFAULT; 94 95 buf += len; 96 pos += len; 97 count -= len; 98 } 99 count = pos - *ppos; 100 *ppos = pos; 101 return count; 102 } 103 104 static const struct file_operations csio_mem_debugfs_fops = { 105 .owner = THIS_MODULE, 106 .open = simple_open, 107 .read = csio_mem_read, 108 .llseek = default_llseek, 109 }; 110 111 static void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, 112 unsigned int idx, unsigned int size_mb) 113 { 114 struct dentry *de; 115 116 de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root, 117 (void *)hw + idx, &csio_mem_debugfs_fops); 118 if (de && de->d_inode) 119 de->d_inode->i_size = size_mb << 20; 120 } 121 122 static int csio_setup_debugfs(struct csio_hw *hw) 123 { 124 int i; 125 126 if (IS_ERR_OR_NULL(hw->debugfs_root)) 127 return -1; 128 129 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE); 130 if (i & EDRAM0_ENABLE) 131 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); 132 if (i & EDRAM1_ENABLE) 133 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); 134 if (i & EXT_MEM_ENABLE) 135 csio_add_debugfs_mem(hw, "mc", MEM_MC, 136 EXT_MEM_SIZE_GET(csio_rd_reg32(hw, MA_EXT_MEMORY_BAR))); 137 return 0; 138 } 139 140 /* 141 * csio_dfs_create - Creates and sets up per-hw debugfs. 142 * 143 */ 144 static int 145 csio_dfs_create(struct csio_hw *hw) 146 { 147 if (csio_debugfs_root) { 148 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), 149 csio_debugfs_root); 150 csio_setup_debugfs(hw); 151 } 152 153 return 0; 154 } 155 156 /* 157 * csio_dfs_destroy - Destroys per-hw debugfs. 158 */ 159 static int 160 csio_dfs_destroy(struct csio_hw *hw) 161 { 162 if (hw->debugfs_root) 163 debugfs_remove_recursive(hw->debugfs_root); 164 165 return 0; 166 } 167 168 /* 169 * csio_dfs_init - Debug filesystem initialization for the module. 170 * 171 */ 172 static int 173 csio_dfs_init(void) 174 { 175 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 176 if (!csio_debugfs_root) 177 pr_warn("Could not create debugfs entry, continuing\n"); 178 179 return 0; 180 } 181 182 /* 183 * csio_dfs_exit - debugfs cleanup for the module. 184 */ 185 static void 186 csio_dfs_exit(void) 187 { 188 debugfs_remove(csio_debugfs_root); 189 } 190 191 /* 192 * csio_pci_init - PCI initialization. 193 * @pdev: PCI device. 194 * @bars: Bitmask of bars to be requested. 195 * 196 * Initializes the PCI function by enabling MMIO, setting bus 197 * mastership and setting DMA mask. 198 */ 199 static int 200 csio_pci_init(struct pci_dev *pdev, int *bars) 201 { 202 int rv = -ENODEV; 203 204 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 205 206 if (pci_enable_device_mem(pdev)) 207 goto err; 208 209 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 210 goto err_disable_device; 211 212 pci_set_master(pdev); 213 pci_try_set_mwi(pdev); 214 215 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 216 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 217 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { 218 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 219 } else { 220 dev_err(&pdev->dev, "No suitable DMA available.\n"); 221 goto err_release_regions; 222 } 223 224 return 0; 225 226 err_release_regions: 227 pci_release_selected_regions(pdev, *bars); 228 err_disable_device: 229 pci_disable_device(pdev); 230 err: 231 return rv; 232 233 } 234 235 /* 236 * csio_pci_exit - PCI unitialization. 237 * @pdev: PCI device. 238 * @bars: Bars to be released. 239 * 240 */ 241 static void 242 csio_pci_exit(struct pci_dev *pdev, int *bars) 243 { 244 pci_release_selected_regions(pdev, *bars); 245 pci_disable_device(pdev); 246 } 247 248 /* 249 * csio_hw_init_workers - Initialize the HW module's worker threads. 250 * @hw: HW module. 251 * 252 */ 253 static void 254 csio_hw_init_workers(struct csio_hw *hw) 255 { 256 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 257 } 258 259 static void 260 csio_hw_exit_workers(struct csio_hw *hw) 261 { 262 cancel_work_sync(&hw->evtq_work); 263 flush_scheduled_work(); 264 } 265 266 static int 267 csio_create_queues(struct csio_hw *hw) 268 { 269 int i, j; 270 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 271 int rv; 272 struct csio_scsi_cpu_info *info; 273 274 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 275 return 0; 276 277 if (hw->intr_mode != CSIO_IM_MSIX) { 278 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 279 0, hw->pport[0].portid, false, NULL); 280 if (rv != 0) { 281 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 282 return rv; 283 } 284 } 285 286 /* FW event queue */ 287 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 288 csio_get_fwevt_intr_idx(hw), 289 hw->pport[0].portid, true, NULL); 290 if (rv != 0) { 291 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 292 return rv; 293 } 294 295 /* Create mgmt queue */ 296 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 297 mgmtm->iq_idx, hw->pport[0].portid, NULL); 298 299 if (rv != 0) { 300 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 301 goto err; 302 } 303 304 /* Create SCSI queues */ 305 for (i = 0; i < hw->num_pports; i++) { 306 info = &hw->scsi_cpu_info[i]; 307 308 for (j = 0; j < info->max_cpus; j++) { 309 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 310 311 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 312 sqset->intr_idx, i, false, NULL); 313 if (rv != 0) { 314 csio_err(hw, 315 "SCSI module IQ config failed [%d][%d]:%d\n", 316 i, j, rv); 317 goto err; 318 } 319 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 320 sqset->iq_idx, i, NULL); 321 if (rv != 0) { 322 csio_err(hw, 323 "SCSI module EQ config failed [%d][%d]:%d\n", 324 i, j, rv); 325 goto err; 326 } 327 } /* for all CPUs */ 328 } /* For all ports */ 329 330 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 331 return 0; 332 err: 333 csio_wr_destroy_queues(hw, true); 334 return -EINVAL; 335 } 336 337 /* 338 * csio_config_queues - Configure the DMA queues. 339 * @hw: HW module. 340 * 341 * Allocates memory for queues are registers them with FW. 342 */ 343 int 344 csio_config_queues(struct csio_hw *hw) 345 { 346 int i, j, idx, k = 0; 347 int rv; 348 struct csio_scsi_qset *sqset; 349 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 350 struct csio_scsi_qset *orig; 351 struct csio_scsi_cpu_info *info; 352 353 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 354 return csio_create_queues(hw); 355 356 /* Calculate number of SCSI queues for MSIX we would like */ 357 hw->num_scsi_msix_cpus = num_online_cpus(); 358 hw->num_sqsets = num_online_cpus() * hw->num_pports; 359 360 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 361 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 362 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 363 } 364 365 /* Initialize max_cpus, may get reduced during msix allocations */ 366 for (i = 0; i < hw->num_pports; i++) 367 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 368 369 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 370 hw->num_sqsets, hw->num_scsi_msix_cpus); 371 372 csio_intr_enable(hw); 373 374 if (hw->intr_mode != CSIO_IM_MSIX) { 375 376 /* Allocate Forward interrupt iq. */ 377 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 378 CSIO_INTR_WRSIZE, CSIO_INGRESS, 379 (void *)hw, 0, 0, NULL); 380 if (hw->intr_iq_idx == -1) { 381 csio_err(hw, 382 "Forward interrupt queue creation failed\n"); 383 goto intr_disable; 384 } 385 } 386 387 /* Allocate the FW evt queue */ 388 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 389 CSIO_FWEVT_WRSIZE, 390 CSIO_INGRESS, (void *)hw, 391 CSIO_FWEVT_FLBUFS, 0, 392 csio_fwevt_intx_handler); 393 if (hw->fwevt_iq_idx == -1) { 394 csio_err(hw, "FW evt queue creation failed\n"); 395 goto intr_disable; 396 } 397 398 /* Allocate the mgmt queue */ 399 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 400 CSIO_MGMT_EQ_WRSIZE, 401 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 402 if (mgmtm->eq_idx == -1) { 403 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 404 goto intr_disable; 405 } 406 407 /* Use FW IQ for MGMT req completion */ 408 mgmtm->iq_idx = hw->fwevt_iq_idx; 409 410 /* Allocate SCSI queues */ 411 for (i = 0; i < hw->num_pports; i++) { 412 info = &hw->scsi_cpu_info[i]; 413 414 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 415 sqset = &hw->sqset[i][j]; 416 417 if (j >= info->max_cpus) { 418 k = j % info->max_cpus; 419 orig = &hw->sqset[i][k]; 420 sqset->eq_idx = orig->eq_idx; 421 sqset->iq_idx = orig->iq_idx; 422 continue; 423 } 424 425 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 426 CSIO_EGRESS, (void *)hw, 0, 0, 427 NULL); 428 if (idx == -1) { 429 csio_err(hw, "EQ creation failed for idx:%d\n", 430 idx); 431 goto intr_disable; 432 } 433 434 sqset->eq_idx = idx; 435 436 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 437 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 438 (void *)hw, 0, 0, 439 csio_scsi_intx_handler); 440 if (idx == -1) { 441 csio_err(hw, "IQ creation failed for idx:%d\n", 442 idx); 443 goto intr_disable; 444 } 445 sqset->iq_idx = idx; 446 } /* for all CPUs */ 447 } /* For all ports */ 448 449 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 450 451 rv = csio_create_queues(hw); 452 if (rv != 0) 453 goto intr_disable; 454 455 /* 456 * Now request IRQs for the vectors. In the event of a failure, 457 * cleanup is handled internally by this function. 458 */ 459 rv = csio_request_irqs(hw); 460 if (rv != 0) 461 return -EINVAL; 462 463 return 0; 464 465 intr_disable: 466 csio_intr_disable(hw, false); 467 468 return -EINVAL; 469 } 470 471 static int 472 csio_resource_alloc(struct csio_hw *hw) 473 { 474 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 475 int rv = -ENOMEM; 476 477 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 478 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 479 480 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 481 sizeof(struct csio_mb)); 482 if (!hw->mb_mempool) 483 goto err; 484 485 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 486 sizeof(struct csio_rnode)); 487 if (!hw->rnode_mempool) 488 goto err_free_mb_mempool; 489 490 hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev, 491 CSIO_SCSI_RSP_LEN, 8, 0); 492 if (!hw->scsi_pci_pool) 493 goto err_free_rn_pool; 494 495 return 0; 496 497 err_free_rn_pool: 498 mempool_destroy(hw->rnode_mempool); 499 hw->rnode_mempool = NULL; 500 err_free_mb_mempool: 501 mempool_destroy(hw->mb_mempool); 502 hw->mb_mempool = NULL; 503 err: 504 return rv; 505 } 506 507 static void 508 csio_resource_free(struct csio_hw *hw) 509 { 510 pci_pool_destroy(hw->scsi_pci_pool); 511 hw->scsi_pci_pool = NULL; 512 mempool_destroy(hw->rnode_mempool); 513 hw->rnode_mempool = NULL; 514 mempool_destroy(hw->mb_mempool); 515 hw->mb_mempool = NULL; 516 } 517 518 /* 519 * csio_hw_alloc - Allocate and initialize the HW module. 520 * @pdev: PCI device. 521 * 522 * Allocates HW structure, DMA, memory resources, maps BARS to 523 * host memory and initializes HW module. 524 */ 525 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 526 { 527 struct csio_hw *hw; 528 529 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 530 if (!hw) 531 goto err; 532 533 hw->pdev = pdev; 534 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 535 536 /* memory pool/DMA pool allocation */ 537 if (csio_resource_alloc(hw)) 538 goto err_free_hw; 539 540 /* Get the start address of registers from BAR 0 */ 541 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 542 pci_resource_len(pdev, 0)); 543 if (!hw->regstart) { 544 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 545 hw->regstart); 546 goto err_resource_free; 547 } 548 549 csio_hw_init_workers(hw); 550 551 if (csio_hw_init(hw)) 552 goto err_unmap_bar; 553 554 csio_dfs_create(hw); 555 556 csio_dbg(hw, "hw:%p\n", hw); 557 558 return hw; 559 560 err_unmap_bar: 561 csio_hw_exit_workers(hw); 562 iounmap(hw->regstart); 563 err_resource_free: 564 csio_resource_free(hw); 565 err_free_hw: 566 kfree(hw); 567 err: 568 return NULL; 569 } 570 571 /* 572 * csio_hw_free - Uninitialize and free the HW module. 573 * @hw: The HW module 574 * 575 * Disable interrupts, uninit the HW module, free resources, free hw. 576 */ 577 static void 578 csio_hw_free(struct csio_hw *hw) 579 { 580 csio_intr_disable(hw, true); 581 csio_hw_exit_workers(hw); 582 csio_hw_exit(hw); 583 iounmap(hw->regstart); 584 csio_dfs_destroy(hw); 585 csio_resource_free(hw); 586 kfree(hw); 587 } 588 589 /** 590 * csio_shost_init - Create and initialize the lnode module. 591 * @hw: The HW module. 592 * @dev: The device associated with this invocation. 593 * @probe: Called from probe context or not? 594 * @os_pln: Parent lnode if any. 595 * 596 * Allocates lnode structure via scsi_host_alloc, initializes 597 * shost, initializes lnode module and registers with SCSI ML 598 * via scsi_host_add. This function is shared between physical and 599 * virtual node ports. 600 */ 601 struct csio_lnode * 602 csio_shost_init(struct csio_hw *hw, struct device *dev, 603 bool probe, struct csio_lnode *pln) 604 { 605 struct Scsi_Host *shost = NULL; 606 struct csio_lnode *ln; 607 608 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 609 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 610 611 /* 612 * hw->pdev is the physical port's PCI dev structure, 613 * which will be different from the NPIV dev structure. 614 */ 615 if (dev == &hw->pdev->dev) 616 shost = scsi_host_alloc( 617 &csio_fcoe_shost_template, 618 sizeof(struct csio_lnode)); 619 else 620 shost = scsi_host_alloc( 621 &csio_fcoe_shost_vport_template, 622 sizeof(struct csio_lnode)); 623 624 if (!shost) 625 goto err; 626 627 ln = shost_priv(shost); 628 memset(ln, 0, sizeof(struct csio_lnode)); 629 630 /* Link common lnode to this lnode */ 631 ln->dev_num = (shost->host_no << 16); 632 633 shost->can_queue = CSIO_MAX_QUEUE; 634 shost->this_id = -1; 635 shost->unique_id = shost->host_no; 636 shost->max_cmd_len = 16; /* Max CDB length supported */ 637 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 638 hw->fres_info.max_ssns); 639 shost->max_lun = CSIO_MAX_LUN; 640 if (dev == &hw->pdev->dev) 641 shost->transportt = csio_fcoe_transport; 642 else 643 shost->transportt = csio_fcoe_transport_vport; 644 645 /* root lnode */ 646 if (!hw->rln) 647 hw->rln = ln; 648 649 /* Other initialization here: Common, Transport specific */ 650 if (csio_lnode_init(ln, hw, pln)) 651 goto err_shost_put; 652 653 if (scsi_add_host(shost, dev)) 654 goto err_lnode_exit; 655 656 return ln; 657 658 err_lnode_exit: 659 csio_lnode_exit(ln); 660 err_shost_put: 661 scsi_host_put(shost); 662 err: 663 return NULL; 664 } 665 666 /** 667 * csio_shost_exit - De-instantiate the shost. 668 * @ln: The lnode module corresponding to the shost. 669 * 670 */ 671 void 672 csio_shost_exit(struct csio_lnode *ln) 673 { 674 struct Scsi_Host *shost = csio_ln_to_shost(ln); 675 struct csio_hw *hw = csio_lnode_to_hw(ln); 676 677 /* Inform transport */ 678 fc_remove_host(shost); 679 680 /* Inform SCSI ML */ 681 scsi_remove_host(shost); 682 683 /* Flush all the events, so that any rnode removal events 684 * already queued are all handled, before we remove the lnode. 685 */ 686 spin_lock_irq(&hw->lock); 687 csio_evtq_flush(hw); 688 spin_unlock_irq(&hw->lock); 689 690 csio_lnode_exit(ln); 691 scsi_host_put(shost); 692 } 693 694 struct csio_lnode * 695 csio_lnode_alloc(struct csio_hw *hw) 696 { 697 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 698 } 699 700 void 701 csio_lnodes_block_request(struct csio_hw *hw) 702 { 703 struct Scsi_Host *shost; 704 struct csio_lnode *sln; 705 struct csio_lnode *ln; 706 struct list_head *cur_ln, *cur_cln; 707 struct csio_lnode **lnode_list; 708 int cur_cnt = 0, ii; 709 710 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 711 GFP_KERNEL); 712 if (!lnode_list) { 713 csio_err(hw, "Failed to allocate lnodes_list"); 714 return; 715 } 716 717 spin_lock_irq(&hw->lock); 718 /* Traverse sibling lnodes */ 719 list_for_each(cur_ln, &hw->sln_head) { 720 sln = (struct csio_lnode *) cur_ln; 721 lnode_list[cur_cnt++] = sln; 722 723 /* Traverse children lnodes */ 724 list_for_each(cur_cln, &sln->cln_head) 725 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 726 } 727 spin_unlock_irq(&hw->lock); 728 729 for (ii = 0; ii < cur_cnt; ii++) { 730 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 731 ln = lnode_list[ii]; 732 shost = csio_ln_to_shost(ln); 733 scsi_block_requests(shost); 734 735 } 736 kfree(lnode_list); 737 } 738 739 void 740 csio_lnodes_unblock_request(struct csio_hw *hw) 741 { 742 struct csio_lnode *ln; 743 struct Scsi_Host *shost; 744 struct csio_lnode *sln; 745 struct list_head *cur_ln, *cur_cln; 746 struct csio_lnode **lnode_list; 747 int cur_cnt = 0, ii; 748 749 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 750 GFP_KERNEL); 751 if (!lnode_list) { 752 csio_err(hw, "Failed to allocate lnodes_list"); 753 return; 754 } 755 756 spin_lock_irq(&hw->lock); 757 /* Traverse sibling lnodes */ 758 list_for_each(cur_ln, &hw->sln_head) { 759 sln = (struct csio_lnode *) cur_ln; 760 lnode_list[cur_cnt++] = sln; 761 762 /* Traverse children lnodes */ 763 list_for_each(cur_cln, &sln->cln_head) 764 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 765 } 766 spin_unlock_irq(&hw->lock); 767 768 for (ii = 0; ii < cur_cnt; ii++) { 769 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 770 ln = lnode_list[ii]; 771 shost = csio_ln_to_shost(ln); 772 scsi_unblock_requests(shost); 773 } 774 kfree(lnode_list); 775 } 776 777 void 778 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 779 { 780 struct csio_lnode *ln; 781 struct Scsi_Host *shost; 782 struct csio_lnode *sln; 783 struct list_head *cur_ln, *cur_cln; 784 struct csio_lnode **lnode_list; 785 int cur_cnt = 0, ii; 786 787 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 788 GFP_KERNEL); 789 if (!lnode_list) { 790 csio_err(hw, "Failed to allocate lnodes_list"); 791 return; 792 } 793 794 spin_lock_irq(&hw->lock); 795 /* Traverse sibling lnodes */ 796 list_for_each(cur_ln, &hw->sln_head) { 797 sln = (struct csio_lnode *) cur_ln; 798 if (sln->portid != portid) 799 continue; 800 801 lnode_list[cur_cnt++] = sln; 802 803 /* Traverse children lnodes */ 804 list_for_each(cur_cln, &sln->cln_head) 805 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 806 } 807 spin_unlock_irq(&hw->lock); 808 809 for (ii = 0; ii < cur_cnt; ii++) { 810 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 811 ln = lnode_list[ii]; 812 shost = csio_ln_to_shost(ln); 813 scsi_block_requests(shost); 814 } 815 kfree(lnode_list); 816 } 817 818 void 819 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 820 { 821 struct csio_lnode *ln; 822 struct Scsi_Host *shost; 823 struct csio_lnode *sln; 824 struct list_head *cur_ln, *cur_cln; 825 struct csio_lnode **lnode_list; 826 int cur_cnt = 0, ii; 827 828 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 829 GFP_KERNEL); 830 if (!lnode_list) { 831 csio_err(hw, "Failed to allocate lnodes_list"); 832 return; 833 } 834 835 spin_lock_irq(&hw->lock); 836 /* Traverse sibling lnodes */ 837 list_for_each(cur_ln, &hw->sln_head) { 838 sln = (struct csio_lnode *) cur_ln; 839 if (sln->portid != portid) 840 continue; 841 lnode_list[cur_cnt++] = sln; 842 843 /* Traverse children lnodes */ 844 list_for_each(cur_cln, &sln->cln_head) 845 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 846 } 847 spin_unlock_irq(&hw->lock); 848 849 for (ii = 0; ii < cur_cnt; ii++) { 850 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 851 ln = lnode_list[ii]; 852 shost = csio_ln_to_shost(ln); 853 scsi_unblock_requests(shost); 854 } 855 kfree(lnode_list); 856 } 857 858 void 859 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 860 { 861 struct csio_lnode *sln; 862 struct csio_lnode *ln; 863 struct list_head *cur_ln, *cur_cln; 864 struct csio_lnode **lnode_list; 865 int cur_cnt = 0, ii; 866 867 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 868 GFP_KERNEL); 869 if (!lnode_list) { 870 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 871 return; 872 } 873 874 /* Get all child lnodes(NPIV ports) */ 875 spin_lock_irq(&hw->lock); 876 list_for_each(cur_ln, &hw->sln_head) { 877 sln = (struct csio_lnode *) cur_ln; 878 879 /* Traverse children lnodes */ 880 list_for_each(cur_cln, &sln->cln_head) 881 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 882 } 883 spin_unlock_irq(&hw->lock); 884 885 /* Delete NPIV lnodes */ 886 for (ii = 0; ii < cur_cnt; ii++) { 887 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 888 ln = lnode_list[ii]; 889 fc_vport_terminate(ln->fc_vport); 890 } 891 892 /* Delete only npiv lnodes */ 893 if (npiv) 894 goto free_lnodes; 895 896 cur_cnt = 0; 897 /* Get all physical lnodes */ 898 spin_lock_irq(&hw->lock); 899 /* Traverse sibling lnodes */ 900 list_for_each(cur_ln, &hw->sln_head) { 901 sln = (struct csio_lnode *) cur_ln; 902 lnode_list[cur_cnt++] = sln; 903 } 904 spin_unlock_irq(&hw->lock); 905 906 /* Delete physical lnodes */ 907 for (ii = 0; ii < cur_cnt; ii++) { 908 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 909 csio_shost_exit(lnode_list[ii]); 910 } 911 912 free_lnodes: 913 kfree(lnode_list); 914 } 915 916 /* 917 * csio_lnode_init_post: Set lnode attributes after starting HW. 918 * @ln: lnode. 919 * 920 */ 921 static void 922 csio_lnode_init_post(struct csio_lnode *ln) 923 { 924 struct Scsi_Host *shost = csio_ln_to_shost(ln); 925 926 csio_fchost_attr_init(ln); 927 928 scsi_scan_host(shost); 929 } 930 931 /* 932 * csio_probe_one - Instantiate this function. 933 * @pdev: PCI device 934 * @id: Device ID 935 * 936 * This is the .probe() callback of the driver. This function: 937 * - Initializes the PCI function by enabling MMIO, setting bus 938 * mastership and setting DMA mask. 939 * - Allocates HW structure, DMA, memory resources, maps BARS to 940 * host memory and initializes HW module. 941 * - Allocates lnode structure via scsi_host_alloc, initializes 942 * shost, initialized lnode module and registers with SCSI ML 943 * via scsi_host_add. 944 * - Enables interrupts, and starts the chip by kicking off the 945 * HW state machine. 946 * - Once hardware is ready, initiated scan of the host via 947 * scsi_scan_host. 948 */ 949 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 950 { 951 int rv; 952 int bars; 953 int i; 954 struct csio_hw *hw; 955 struct csio_lnode *ln; 956 957 rv = csio_pci_init(pdev, &bars); 958 if (rv) 959 goto err; 960 961 hw = csio_hw_alloc(pdev); 962 if (!hw) { 963 rv = -ENODEV; 964 goto err_pci_exit; 965 } 966 967 pci_set_drvdata(pdev, hw); 968 969 if (csio_hw_start(hw) != 0) { 970 dev_err(&pdev->dev, 971 "Failed to start FW, continuing in debug mode.\n"); 972 return 0; 973 } 974 975 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 976 FW_HDR_FW_VER_MAJOR_GET(hw->fwrev), 977 FW_HDR_FW_VER_MINOR_GET(hw->fwrev), 978 FW_HDR_FW_VER_MICRO_GET(hw->fwrev), 979 FW_HDR_FW_VER_BUILD_GET(hw->fwrev)); 980 981 for (i = 0; i < hw->num_pports; i++) { 982 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 983 if (!ln) { 984 rv = -ENODEV; 985 break; 986 } 987 /* Initialize portid */ 988 ln->portid = hw->pport[i].portid; 989 990 spin_lock_irq(&hw->lock); 991 if (csio_lnode_start(ln) != 0) 992 rv = -ENODEV; 993 spin_unlock_irq(&hw->lock); 994 995 if (rv) 996 break; 997 998 csio_lnode_init_post(ln); 999 } 1000 1001 if (rv) 1002 goto err_lnode_exit; 1003 1004 return 0; 1005 1006 err_lnode_exit: 1007 csio_lnodes_block_request(hw); 1008 spin_lock_irq(&hw->lock); 1009 csio_hw_stop(hw); 1010 spin_unlock_irq(&hw->lock); 1011 csio_lnodes_unblock_request(hw); 1012 pci_set_drvdata(hw->pdev, NULL); 1013 csio_lnodes_exit(hw, 0); 1014 csio_hw_free(hw); 1015 err_pci_exit: 1016 csio_pci_exit(pdev, &bars); 1017 err: 1018 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1019 return rv; 1020 } 1021 1022 /* 1023 * csio_remove_one - Remove one instance of the driver at this PCI function. 1024 * @pdev: PCI device 1025 * 1026 * Used during hotplug operation. 1027 */ 1028 static void csio_remove_one(struct pci_dev *pdev) 1029 { 1030 struct csio_hw *hw = pci_get_drvdata(pdev); 1031 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1032 1033 csio_lnodes_block_request(hw); 1034 spin_lock_irq(&hw->lock); 1035 1036 /* Stops lnode, Rnode s/m 1037 * Quiesce IOs. 1038 * All sessions with remote ports are unregistered. 1039 */ 1040 csio_hw_stop(hw); 1041 spin_unlock_irq(&hw->lock); 1042 csio_lnodes_unblock_request(hw); 1043 1044 csio_lnodes_exit(hw, 0); 1045 csio_hw_free(hw); 1046 pci_set_drvdata(pdev, NULL); 1047 csio_pci_exit(pdev, &bars); 1048 } 1049 1050 /* 1051 * csio_pci_error_detected - PCI error was detected 1052 * @pdev: PCI device 1053 * 1054 */ 1055 static pci_ers_result_t 1056 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1057 { 1058 struct csio_hw *hw = pci_get_drvdata(pdev); 1059 1060 csio_lnodes_block_request(hw); 1061 spin_lock_irq(&hw->lock); 1062 1063 /* Post PCI error detected evt to HW s/m 1064 * HW s/m handles this evt by quiescing IOs, unregisters rports 1065 * and finally takes the device to offline. 1066 */ 1067 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1068 spin_unlock_irq(&hw->lock); 1069 csio_lnodes_unblock_request(hw); 1070 csio_lnodes_exit(hw, 0); 1071 csio_intr_disable(hw, true); 1072 pci_disable_device(pdev); 1073 return state == pci_channel_io_perm_failure ? 1074 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1075 } 1076 1077 /* 1078 * csio_pci_slot_reset - PCI slot has been reset. 1079 * @pdev: PCI device 1080 * 1081 */ 1082 static pci_ers_result_t 1083 csio_pci_slot_reset(struct pci_dev *pdev) 1084 { 1085 struct csio_hw *hw = pci_get_drvdata(pdev); 1086 int ready; 1087 1088 if (pci_enable_device(pdev)) { 1089 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1090 return PCI_ERS_RESULT_DISCONNECT; 1091 } 1092 1093 pci_set_master(pdev); 1094 pci_restore_state(pdev); 1095 pci_save_state(pdev); 1096 pci_cleanup_aer_uncorrect_error_status(pdev); 1097 1098 /* Bring HW s/m to ready state. 1099 * but don't resume IOs. 1100 */ 1101 spin_lock_irq(&hw->lock); 1102 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1103 ready = csio_is_hw_ready(hw); 1104 spin_unlock_irq(&hw->lock); 1105 1106 if (ready) { 1107 return PCI_ERS_RESULT_RECOVERED; 1108 } else { 1109 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1110 return PCI_ERS_RESULT_DISCONNECT; 1111 } 1112 } 1113 1114 /* 1115 * csio_pci_resume - Resume normal operations 1116 * @pdev: PCI device 1117 * 1118 */ 1119 static void 1120 csio_pci_resume(struct pci_dev *pdev) 1121 { 1122 struct csio_hw *hw = pci_get_drvdata(pdev); 1123 struct csio_lnode *ln; 1124 int rv = 0; 1125 int i; 1126 1127 /* Bring the LINK UP and Resume IO */ 1128 1129 for (i = 0; i < hw->num_pports; i++) { 1130 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1131 if (!ln) { 1132 rv = -ENODEV; 1133 break; 1134 } 1135 /* Initialize portid */ 1136 ln->portid = hw->pport[i].portid; 1137 1138 spin_lock_irq(&hw->lock); 1139 if (csio_lnode_start(ln) != 0) 1140 rv = -ENODEV; 1141 spin_unlock_irq(&hw->lock); 1142 1143 if (rv) 1144 break; 1145 1146 csio_lnode_init_post(ln); 1147 } 1148 1149 if (rv) 1150 goto err_resume_exit; 1151 1152 return; 1153 1154 err_resume_exit: 1155 csio_lnodes_block_request(hw); 1156 spin_lock_irq(&hw->lock); 1157 csio_hw_stop(hw); 1158 spin_unlock_irq(&hw->lock); 1159 csio_lnodes_unblock_request(hw); 1160 csio_lnodes_exit(hw, 0); 1161 csio_hw_free(hw); 1162 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1163 } 1164 1165 static struct pci_error_handlers csio_err_handler = { 1166 .error_detected = csio_pci_error_detected, 1167 .slot_reset = csio_pci_slot_reset, 1168 .resume = csio_pci_resume, 1169 }; 1170 1171 static DEFINE_PCI_DEVICE_TABLE(csio_pci_tbl) = { 1172 CSIO_DEVICE(CSIO_DEVID_T440DBG_FCOE, 0), /* T440DBG FCOE */ 1173 CSIO_DEVICE(CSIO_DEVID_T420CR_FCOE, 0), /* T420CR FCOE */ 1174 CSIO_DEVICE(CSIO_DEVID_T422CR_FCOE, 0), /* T422CR FCOE */ 1175 CSIO_DEVICE(CSIO_DEVID_T440CR_FCOE, 0), /* T440CR FCOE */ 1176 CSIO_DEVICE(CSIO_DEVID_T420BCH_FCOE, 0), /* T420BCH FCOE */ 1177 CSIO_DEVICE(CSIO_DEVID_T440BCH_FCOE, 0), /* T440BCH FCOE */ 1178 CSIO_DEVICE(CSIO_DEVID_T440CH_FCOE, 0), /* T440CH FCOE */ 1179 CSIO_DEVICE(CSIO_DEVID_T420SO_FCOE, 0), /* T420SO FCOE */ 1180 CSIO_DEVICE(CSIO_DEVID_T420CX_FCOE, 0), /* T420CX FCOE */ 1181 CSIO_DEVICE(CSIO_DEVID_T420BT_FCOE, 0), /* T420BT FCOE */ 1182 CSIO_DEVICE(CSIO_DEVID_T404BT_FCOE, 0), /* T404BT FCOE */ 1183 CSIO_DEVICE(CSIO_DEVID_B420_FCOE, 0), /* B420 FCOE */ 1184 CSIO_DEVICE(CSIO_DEVID_B404_FCOE, 0), /* B404 FCOE */ 1185 CSIO_DEVICE(CSIO_DEVID_T480CR_FCOE, 0), /* T480 CR FCOE */ 1186 CSIO_DEVICE(CSIO_DEVID_T440LPCR_FCOE, 0), /* T440 LP-CR FCOE */ 1187 CSIO_DEVICE(CSIO_DEVID_PE10K, 0), /* PE10K FCOE */ 1188 CSIO_DEVICE(CSIO_DEVID_PE10K_PF1, 0), /* PE10K FCOE on PF1 */ 1189 { 0, 0, 0, 0, 0, 0, 0 } 1190 }; 1191 1192 1193 static struct pci_driver csio_pci_driver = { 1194 .name = KBUILD_MODNAME, 1195 .driver = { 1196 .owner = THIS_MODULE, 1197 }, 1198 .id_table = csio_pci_tbl, 1199 .probe = csio_probe_one, 1200 .remove = csio_remove_one, 1201 .err_handler = &csio_err_handler, 1202 }; 1203 1204 /* 1205 * csio_init - Chelsio storage driver initialization function. 1206 * 1207 */ 1208 static int __init 1209 csio_init(void) 1210 { 1211 int rv = -ENOMEM; 1212 1213 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1214 1215 csio_dfs_init(); 1216 1217 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1218 if (!csio_fcoe_transport) 1219 goto err; 1220 1221 csio_fcoe_transport_vport = 1222 fc_attach_transport(&csio_fc_transport_vport_funcs); 1223 if (!csio_fcoe_transport_vport) 1224 goto err_vport; 1225 1226 rv = pci_register_driver(&csio_pci_driver); 1227 if (rv) 1228 goto err_pci; 1229 1230 return 0; 1231 1232 err_pci: 1233 fc_release_transport(csio_fcoe_transport_vport); 1234 err_vport: 1235 fc_release_transport(csio_fcoe_transport); 1236 err: 1237 csio_dfs_exit(); 1238 return rv; 1239 } 1240 1241 /* 1242 * csio_exit - Chelsio storage driver uninitialization . 1243 * 1244 * Function that gets called in the unload path. 1245 */ 1246 static void __exit 1247 csio_exit(void) 1248 { 1249 pci_unregister_driver(&csio_pci_driver); 1250 csio_dfs_exit(); 1251 fc_release_transport(csio_fcoe_transport_vport); 1252 fc_release_transport(csio_fcoe_transport); 1253 } 1254 1255 module_init(csio_init); 1256 module_exit(csio_exit); 1257 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1258 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1259 MODULE_LICENSE(CSIO_DRV_LICENSE); 1260 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1261 MODULE_VERSION(CSIO_DRV_VERSION); 1262 MODULE_FIRMWARE(CSIO_FW_FNAME); 1263