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 int 64 csio_mem_open(struct inode *inode, struct file *file) 65 { 66 file->private_data = inode->i_private; 67 return 0; 68 } 69 70 static ssize_t 71 csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) 72 { 73 loff_t pos = *ppos; 74 loff_t avail = file->f_path.dentry->d_inode->i_size; 75 unsigned int mem = (uintptr_t)file->private_data & 3; 76 struct csio_hw *hw = file->private_data - mem; 77 78 if (pos < 0) 79 return -EINVAL; 80 if (pos >= avail) 81 return 0; 82 if (count > avail - pos) 83 count = avail - pos; 84 85 while (count) { 86 size_t len; 87 int ret, ofst; 88 __be32 data[16]; 89 90 if (mem == MEM_MC) 91 ret = csio_hw_mc_read(hw, pos, data, NULL); 92 else 93 ret = csio_hw_edc_read(hw, mem, pos, data, NULL); 94 if (ret) 95 return ret; 96 97 ofst = pos % sizeof(data); 98 len = min(count, sizeof(data) - ofst); 99 if (copy_to_user(buf, (u8 *)data + ofst, len)) 100 return -EFAULT; 101 102 buf += len; 103 pos += len; 104 count -= len; 105 } 106 count = pos - *ppos; 107 *ppos = pos; 108 return count; 109 } 110 111 static const struct file_operations csio_mem_debugfs_fops = { 112 .owner = THIS_MODULE, 113 .open = csio_mem_open, 114 .read = csio_mem_read, 115 .llseek = default_llseek, 116 }; 117 118 static void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, 119 unsigned int idx, unsigned int size_mb) 120 { 121 struct dentry *de; 122 123 de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root, 124 (void *)hw + idx, &csio_mem_debugfs_fops); 125 if (de && de->d_inode) 126 de->d_inode->i_size = size_mb << 20; 127 } 128 129 static int csio_setup_debugfs(struct csio_hw *hw) 130 { 131 int i; 132 133 if (IS_ERR_OR_NULL(hw->debugfs_root)) 134 return -1; 135 136 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE); 137 if (i & EDRAM0_ENABLE) 138 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); 139 if (i & EDRAM1_ENABLE) 140 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); 141 if (i & EXT_MEM_ENABLE) 142 csio_add_debugfs_mem(hw, "mc", MEM_MC, 143 EXT_MEM_SIZE_GET(csio_rd_reg32(hw, MA_EXT_MEMORY_BAR))); 144 return 0; 145 } 146 147 /* 148 * csio_dfs_create - Creates and sets up per-hw debugfs. 149 * 150 */ 151 static int 152 csio_dfs_create(struct csio_hw *hw) 153 { 154 if (csio_debugfs_root) { 155 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), 156 csio_debugfs_root); 157 csio_setup_debugfs(hw); 158 } 159 160 return 0; 161 } 162 163 /* 164 * csio_dfs_destroy - Destroys per-hw debugfs. 165 */ 166 static int 167 csio_dfs_destroy(struct csio_hw *hw) 168 { 169 if (hw->debugfs_root) 170 debugfs_remove_recursive(hw->debugfs_root); 171 172 return 0; 173 } 174 175 /* 176 * csio_dfs_init - Debug filesystem initialization for the module. 177 * 178 */ 179 static int 180 csio_dfs_init(void) 181 { 182 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 183 if (!csio_debugfs_root) 184 pr_warn("Could not create debugfs entry, continuing\n"); 185 186 return 0; 187 } 188 189 /* 190 * csio_dfs_exit - debugfs cleanup for the module. 191 */ 192 static void 193 csio_dfs_exit(void) 194 { 195 debugfs_remove(csio_debugfs_root); 196 } 197 198 /* 199 * csio_pci_init - PCI initialization. 200 * @pdev: PCI device. 201 * @bars: Bitmask of bars to be requested. 202 * 203 * Initializes the PCI function by enabling MMIO, setting bus 204 * mastership and setting DMA mask. 205 */ 206 static int 207 csio_pci_init(struct pci_dev *pdev, int *bars) 208 { 209 int rv = -ENODEV; 210 211 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 212 213 if (pci_enable_device_mem(pdev)) 214 goto err; 215 216 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 217 goto err_disable_device; 218 219 pci_set_master(pdev); 220 pci_try_set_mwi(pdev); 221 222 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 223 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 224 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { 225 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 226 } else { 227 dev_err(&pdev->dev, "No suitable DMA available.\n"); 228 goto err_release_regions; 229 } 230 231 return 0; 232 233 err_release_regions: 234 pci_release_selected_regions(pdev, *bars); 235 err_disable_device: 236 pci_disable_device(pdev); 237 err: 238 return rv; 239 240 } 241 242 /* 243 * csio_pci_exit - PCI unitialization. 244 * @pdev: PCI device. 245 * @bars: Bars to be released. 246 * 247 */ 248 static void 249 csio_pci_exit(struct pci_dev *pdev, int *bars) 250 { 251 pci_release_selected_regions(pdev, *bars); 252 pci_disable_device(pdev); 253 } 254 255 /* 256 * csio_hw_init_workers - Initialize the HW module's worker threads. 257 * @hw: HW module. 258 * 259 */ 260 static void 261 csio_hw_init_workers(struct csio_hw *hw) 262 { 263 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 264 } 265 266 static void 267 csio_hw_exit_workers(struct csio_hw *hw) 268 { 269 cancel_work_sync(&hw->evtq_work); 270 flush_scheduled_work(); 271 } 272 273 static int 274 csio_create_queues(struct csio_hw *hw) 275 { 276 int i, j; 277 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 278 int rv; 279 struct csio_scsi_cpu_info *info; 280 281 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 282 return 0; 283 284 if (hw->intr_mode != CSIO_IM_MSIX) { 285 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 286 0, hw->pport[0].portid, false, NULL); 287 if (rv != 0) { 288 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 289 return rv; 290 } 291 } 292 293 /* FW event queue */ 294 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 295 csio_get_fwevt_intr_idx(hw), 296 hw->pport[0].portid, true, NULL); 297 if (rv != 0) { 298 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 299 return rv; 300 } 301 302 /* Create mgmt queue */ 303 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 304 mgmtm->iq_idx, hw->pport[0].portid, NULL); 305 306 if (rv != 0) { 307 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 308 goto err; 309 } 310 311 /* Create SCSI queues */ 312 for (i = 0; i < hw->num_pports; i++) { 313 info = &hw->scsi_cpu_info[i]; 314 315 for (j = 0; j < info->max_cpus; j++) { 316 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 317 318 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 319 sqset->intr_idx, i, false, NULL); 320 if (rv != 0) { 321 csio_err(hw, 322 "SCSI module IQ config failed [%d][%d]:%d\n", 323 i, j, rv); 324 goto err; 325 } 326 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 327 sqset->iq_idx, i, NULL); 328 if (rv != 0) { 329 csio_err(hw, 330 "SCSI module EQ config failed [%d][%d]:%d\n", 331 i, j, rv); 332 goto err; 333 } 334 } /* for all CPUs */ 335 } /* For all ports */ 336 337 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 338 return 0; 339 err: 340 csio_wr_destroy_queues(hw, true); 341 return -EINVAL; 342 } 343 344 /* 345 * csio_config_queues - Configure the DMA queues. 346 * @hw: HW module. 347 * 348 * Allocates memory for queues are registers them with FW. 349 */ 350 int 351 csio_config_queues(struct csio_hw *hw) 352 { 353 int i, j, idx, k = 0; 354 int rv; 355 struct csio_scsi_qset *sqset; 356 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 357 struct csio_scsi_qset *orig; 358 struct csio_scsi_cpu_info *info; 359 360 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 361 return csio_create_queues(hw); 362 363 /* Calculate number of SCSI queues for MSIX we would like */ 364 hw->num_scsi_msix_cpus = num_online_cpus(); 365 hw->num_sqsets = num_online_cpus() * hw->num_pports; 366 367 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 368 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 369 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 370 } 371 372 /* Initialize max_cpus, may get reduced during msix allocations */ 373 for (i = 0; i < hw->num_pports; i++) 374 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 375 376 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 377 hw->num_sqsets, hw->num_scsi_msix_cpus); 378 379 csio_intr_enable(hw); 380 381 if (hw->intr_mode != CSIO_IM_MSIX) { 382 383 /* Allocate Forward interrupt iq. */ 384 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 385 CSIO_INTR_WRSIZE, CSIO_INGRESS, 386 (void *)hw, 0, 0, NULL); 387 if (hw->intr_iq_idx == -1) { 388 csio_err(hw, 389 "Forward interrupt queue creation failed\n"); 390 goto intr_disable; 391 } 392 } 393 394 /* Allocate the FW evt queue */ 395 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 396 CSIO_FWEVT_WRSIZE, 397 CSIO_INGRESS, (void *)hw, 398 CSIO_FWEVT_FLBUFS, 0, 399 csio_fwevt_intx_handler); 400 if (hw->fwevt_iq_idx == -1) { 401 csio_err(hw, "FW evt queue creation failed\n"); 402 goto intr_disable; 403 } 404 405 /* Allocate the mgmt queue */ 406 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 407 CSIO_MGMT_EQ_WRSIZE, 408 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 409 if (mgmtm->eq_idx == -1) { 410 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 411 goto intr_disable; 412 } 413 414 /* Use FW IQ for MGMT req completion */ 415 mgmtm->iq_idx = hw->fwevt_iq_idx; 416 417 /* Allocate SCSI queues */ 418 for (i = 0; i < hw->num_pports; i++) { 419 info = &hw->scsi_cpu_info[i]; 420 421 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 422 sqset = &hw->sqset[i][j]; 423 424 if (j >= info->max_cpus) { 425 k = j % info->max_cpus; 426 orig = &hw->sqset[i][k]; 427 sqset->eq_idx = orig->eq_idx; 428 sqset->iq_idx = orig->iq_idx; 429 continue; 430 } 431 432 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 433 CSIO_EGRESS, (void *)hw, 0, 0, 434 NULL); 435 if (idx == -1) { 436 csio_err(hw, "EQ creation failed for idx:%d\n", 437 idx); 438 goto intr_disable; 439 } 440 441 sqset->eq_idx = idx; 442 443 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 444 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 445 (void *)hw, 0, 0, 446 csio_scsi_intx_handler); 447 if (idx == -1) { 448 csio_err(hw, "IQ creation failed for idx:%d\n", 449 idx); 450 goto intr_disable; 451 } 452 sqset->iq_idx = idx; 453 } /* for all CPUs */ 454 } /* For all ports */ 455 456 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 457 458 rv = csio_create_queues(hw); 459 if (rv != 0) 460 goto intr_disable; 461 462 /* 463 * Now request IRQs for the vectors. In the event of a failure, 464 * cleanup is handled internally by this function. 465 */ 466 rv = csio_request_irqs(hw); 467 if (rv != 0) 468 return -EINVAL; 469 470 return 0; 471 472 intr_disable: 473 csio_intr_disable(hw, false); 474 475 return -EINVAL; 476 } 477 478 static int 479 csio_resource_alloc(struct csio_hw *hw) 480 { 481 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 482 int rv = -ENOMEM; 483 484 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 485 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 486 487 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 488 sizeof(struct csio_mb)); 489 if (!hw->mb_mempool) 490 goto err; 491 492 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 493 sizeof(struct csio_rnode)); 494 if (!hw->rnode_mempool) 495 goto err_free_mb_mempool; 496 497 hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev, 498 CSIO_SCSI_RSP_LEN, 8, 0); 499 if (!hw->scsi_pci_pool) 500 goto err_free_rn_pool; 501 502 return 0; 503 504 err_free_rn_pool: 505 mempool_destroy(hw->rnode_mempool); 506 hw->rnode_mempool = NULL; 507 err_free_mb_mempool: 508 mempool_destroy(hw->mb_mempool); 509 hw->mb_mempool = NULL; 510 err: 511 return rv; 512 } 513 514 static void 515 csio_resource_free(struct csio_hw *hw) 516 { 517 pci_pool_destroy(hw->scsi_pci_pool); 518 hw->scsi_pci_pool = NULL; 519 mempool_destroy(hw->rnode_mempool); 520 hw->rnode_mempool = NULL; 521 mempool_destroy(hw->mb_mempool); 522 hw->mb_mempool = NULL; 523 } 524 525 /* 526 * csio_hw_alloc - Allocate and initialize the HW module. 527 * @pdev: PCI device. 528 * 529 * Allocates HW structure, DMA, memory resources, maps BARS to 530 * host memory and initializes HW module. 531 */ 532 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 533 { 534 struct csio_hw *hw; 535 536 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 537 if (!hw) 538 goto err; 539 540 hw->pdev = pdev; 541 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 542 543 /* memory pool/DMA pool allocation */ 544 if (csio_resource_alloc(hw)) 545 goto err_free_hw; 546 547 /* Get the start address of registers from BAR 0 */ 548 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 549 pci_resource_len(pdev, 0)); 550 if (!hw->regstart) { 551 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 552 hw->regstart); 553 goto err_resource_free; 554 } 555 556 csio_hw_init_workers(hw); 557 558 if (csio_hw_init(hw)) 559 goto err_unmap_bar; 560 561 csio_dfs_create(hw); 562 563 csio_dbg(hw, "hw:%p\n", hw); 564 565 return hw; 566 567 err_unmap_bar: 568 csio_hw_exit_workers(hw); 569 iounmap(hw->regstart); 570 err_resource_free: 571 csio_resource_free(hw); 572 err_free_hw: 573 kfree(hw); 574 err: 575 return NULL; 576 } 577 578 /* 579 * csio_hw_free - Uninitialize and free the HW module. 580 * @hw: The HW module 581 * 582 * Disable interrupts, uninit the HW module, free resources, free hw. 583 */ 584 static void 585 csio_hw_free(struct csio_hw *hw) 586 { 587 csio_intr_disable(hw, true); 588 csio_hw_exit_workers(hw); 589 csio_hw_exit(hw); 590 iounmap(hw->regstart); 591 csio_dfs_destroy(hw); 592 csio_resource_free(hw); 593 kfree(hw); 594 } 595 596 /** 597 * csio_shost_init - Create and initialize the lnode module. 598 * @hw: The HW module. 599 * @dev: The device associated with this invocation. 600 * @probe: Called from probe context or not? 601 * @os_pln: Parent lnode if any. 602 * 603 * Allocates lnode structure via scsi_host_alloc, initializes 604 * shost, initializes lnode module and registers with SCSI ML 605 * via scsi_host_add. This function is shared between physical and 606 * virtual node ports. 607 */ 608 struct csio_lnode * 609 csio_shost_init(struct csio_hw *hw, struct device *dev, 610 bool probe, struct csio_lnode *pln) 611 { 612 struct Scsi_Host *shost = NULL; 613 struct csio_lnode *ln; 614 615 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 616 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 617 618 /* 619 * hw->pdev is the physical port's PCI dev structure, 620 * which will be different from the NPIV dev structure. 621 */ 622 if (dev == &hw->pdev->dev) 623 shost = scsi_host_alloc( 624 &csio_fcoe_shost_template, 625 sizeof(struct csio_lnode)); 626 else 627 shost = scsi_host_alloc( 628 &csio_fcoe_shost_vport_template, 629 sizeof(struct csio_lnode)); 630 631 if (!shost) 632 goto err; 633 634 ln = shost_priv(shost); 635 memset(ln, 0, sizeof(struct csio_lnode)); 636 637 /* Link common lnode to this lnode */ 638 ln->dev_num = (shost->host_no << 16); 639 640 shost->can_queue = CSIO_MAX_QUEUE; 641 shost->this_id = -1; 642 shost->unique_id = shost->host_no; 643 shost->max_cmd_len = 16; /* Max CDB length supported */ 644 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 645 hw->fres_info.max_ssns); 646 shost->max_lun = CSIO_MAX_LUN; 647 if (dev == &hw->pdev->dev) 648 shost->transportt = csio_fcoe_transport; 649 else 650 shost->transportt = csio_fcoe_transport_vport; 651 652 /* root lnode */ 653 if (!hw->rln) 654 hw->rln = ln; 655 656 /* Other initialization here: Common, Transport specific */ 657 if (csio_lnode_init(ln, hw, pln)) 658 goto err_shost_put; 659 660 if (scsi_add_host(shost, dev)) 661 goto err_lnode_exit; 662 663 return ln; 664 665 err_lnode_exit: 666 csio_lnode_exit(ln); 667 err_shost_put: 668 scsi_host_put(shost); 669 err: 670 return NULL; 671 } 672 673 /** 674 * csio_shost_exit - De-instantiate the shost. 675 * @ln: The lnode module corresponding to the shost. 676 * 677 */ 678 void 679 csio_shost_exit(struct csio_lnode *ln) 680 { 681 struct Scsi_Host *shost = csio_ln_to_shost(ln); 682 struct csio_hw *hw = csio_lnode_to_hw(ln); 683 684 /* Inform transport */ 685 fc_remove_host(shost); 686 687 /* Inform SCSI ML */ 688 scsi_remove_host(shost); 689 690 /* Flush all the events, so that any rnode removal events 691 * already queued are all handled, before we remove the lnode. 692 */ 693 spin_lock_irq(&hw->lock); 694 csio_evtq_flush(hw); 695 spin_unlock_irq(&hw->lock); 696 697 csio_lnode_exit(ln); 698 scsi_host_put(shost); 699 } 700 701 struct csio_lnode * 702 csio_lnode_alloc(struct csio_hw *hw) 703 { 704 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 705 } 706 707 void 708 csio_lnodes_block_request(struct csio_hw *hw) 709 { 710 struct Scsi_Host *shost; 711 struct csio_lnode *sln; 712 struct csio_lnode *ln; 713 struct list_head *cur_ln, *cur_cln; 714 struct csio_lnode **lnode_list; 715 int cur_cnt = 0, ii; 716 717 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 718 GFP_KERNEL); 719 if (!lnode_list) { 720 csio_err(hw, "Failed to allocate lnodes_list"); 721 return; 722 } 723 724 spin_lock_irq(&hw->lock); 725 /* Traverse sibling lnodes */ 726 list_for_each(cur_ln, &hw->sln_head) { 727 sln = (struct csio_lnode *) cur_ln; 728 lnode_list[cur_cnt++] = sln; 729 730 /* Traverse children lnodes */ 731 list_for_each(cur_cln, &sln->cln_head) 732 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 733 } 734 spin_unlock_irq(&hw->lock); 735 736 for (ii = 0; ii < cur_cnt; ii++) { 737 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 738 ln = lnode_list[ii]; 739 shost = csio_ln_to_shost(ln); 740 scsi_block_requests(shost); 741 742 } 743 kfree(lnode_list); 744 } 745 746 void 747 csio_lnodes_unblock_request(struct csio_hw *hw) 748 { 749 struct csio_lnode *ln; 750 struct Scsi_Host *shost; 751 struct csio_lnode *sln; 752 struct list_head *cur_ln, *cur_cln; 753 struct csio_lnode **lnode_list; 754 int cur_cnt = 0, ii; 755 756 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 757 GFP_KERNEL); 758 if (!lnode_list) { 759 csio_err(hw, "Failed to allocate lnodes_list"); 760 return; 761 } 762 763 spin_lock_irq(&hw->lock); 764 /* Traverse sibling lnodes */ 765 list_for_each(cur_ln, &hw->sln_head) { 766 sln = (struct csio_lnode *) cur_ln; 767 lnode_list[cur_cnt++] = sln; 768 769 /* Traverse children lnodes */ 770 list_for_each(cur_cln, &sln->cln_head) 771 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 772 } 773 spin_unlock_irq(&hw->lock); 774 775 for (ii = 0; ii < cur_cnt; ii++) { 776 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 777 ln = lnode_list[ii]; 778 shost = csio_ln_to_shost(ln); 779 scsi_unblock_requests(shost); 780 } 781 kfree(lnode_list); 782 } 783 784 void 785 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 786 { 787 struct csio_lnode *ln; 788 struct Scsi_Host *shost; 789 struct csio_lnode *sln; 790 struct list_head *cur_ln, *cur_cln; 791 struct csio_lnode **lnode_list; 792 int cur_cnt = 0, ii; 793 794 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 795 GFP_KERNEL); 796 if (!lnode_list) { 797 csio_err(hw, "Failed to allocate lnodes_list"); 798 return; 799 } 800 801 spin_lock_irq(&hw->lock); 802 /* Traverse sibling lnodes */ 803 list_for_each(cur_ln, &hw->sln_head) { 804 sln = (struct csio_lnode *) cur_ln; 805 if (sln->portid != portid) 806 continue; 807 808 lnode_list[cur_cnt++] = sln; 809 810 /* Traverse children lnodes */ 811 list_for_each(cur_cln, &sln->cln_head) 812 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 813 } 814 spin_unlock_irq(&hw->lock); 815 816 for (ii = 0; ii < cur_cnt; ii++) { 817 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 818 ln = lnode_list[ii]; 819 shost = csio_ln_to_shost(ln); 820 scsi_block_requests(shost); 821 } 822 kfree(lnode_list); 823 } 824 825 void 826 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 827 { 828 struct csio_lnode *ln; 829 struct Scsi_Host *shost; 830 struct csio_lnode *sln; 831 struct list_head *cur_ln, *cur_cln; 832 struct csio_lnode **lnode_list; 833 int cur_cnt = 0, ii; 834 835 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 836 GFP_KERNEL); 837 if (!lnode_list) { 838 csio_err(hw, "Failed to allocate lnodes_list"); 839 return; 840 } 841 842 spin_lock_irq(&hw->lock); 843 /* Traverse sibling lnodes */ 844 list_for_each(cur_ln, &hw->sln_head) { 845 sln = (struct csio_lnode *) cur_ln; 846 if (sln->portid != portid) 847 continue; 848 lnode_list[cur_cnt++] = sln; 849 850 /* Traverse children lnodes */ 851 list_for_each(cur_cln, &sln->cln_head) 852 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 853 } 854 spin_unlock_irq(&hw->lock); 855 856 for (ii = 0; ii < cur_cnt; ii++) { 857 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 858 ln = lnode_list[ii]; 859 shost = csio_ln_to_shost(ln); 860 scsi_unblock_requests(shost); 861 } 862 kfree(lnode_list); 863 } 864 865 void 866 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 867 { 868 struct csio_lnode *sln; 869 struct csio_lnode *ln; 870 struct list_head *cur_ln, *cur_cln; 871 struct csio_lnode **lnode_list; 872 int cur_cnt = 0, ii; 873 874 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 875 GFP_KERNEL); 876 if (!lnode_list) { 877 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 878 return; 879 } 880 881 /* Get all child lnodes(NPIV ports) */ 882 spin_lock_irq(&hw->lock); 883 list_for_each(cur_ln, &hw->sln_head) { 884 sln = (struct csio_lnode *) cur_ln; 885 886 /* Traverse children lnodes */ 887 list_for_each(cur_cln, &sln->cln_head) 888 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 889 } 890 spin_unlock_irq(&hw->lock); 891 892 /* Delete NPIV lnodes */ 893 for (ii = 0; ii < cur_cnt; ii++) { 894 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 895 ln = lnode_list[ii]; 896 fc_vport_terminate(ln->fc_vport); 897 } 898 899 /* Delete only npiv lnodes */ 900 if (npiv) 901 goto free_lnodes; 902 903 cur_cnt = 0; 904 /* Get all physical lnodes */ 905 spin_lock_irq(&hw->lock); 906 /* Traverse sibling lnodes */ 907 list_for_each(cur_ln, &hw->sln_head) { 908 sln = (struct csio_lnode *) cur_ln; 909 lnode_list[cur_cnt++] = sln; 910 } 911 spin_unlock_irq(&hw->lock); 912 913 /* Delete physical lnodes */ 914 for (ii = 0; ii < cur_cnt; ii++) { 915 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 916 csio_shost_exit(lnode_list[ii]); 917 } 918 919 free_lnodes: 920 kfree(lnode_list); 921 } 922 923 /* 924 * csio_lnode_init_post: Set lnode attributes after starting HW. 925 * @ln: lnode. 926 * 927 */ 928 static void 929 csio_lnode_init_post(struct csio_lnode *ln) 930 { 931 struct Scsi_Host *shost = csio_ln_to_shost(ln); 932 933 csio_fchost_attr_init(ln); 934 935 scsi_scan_host(shost); 936 } 937 938 /* 939 * csio_probe_one - Instantiate this function. 940 * @pdev: PCI device 941 * @id: Device ID 942 * 943 * This is the .probe() callback of the driver. This function: 944 * - Initializes the PCI function by enabling MMIO, setting bus 945 * mastership and setting DMA mask. 946 * - Allocates HW structure, DMA, memory resources, maps BARS to 947 * host memory and initializes HW module. 948 * - Allocates lnode structure via scsi_host_alloc, initializes 949 * shost, initialized lnode module and registers with SCSI ML 950 * via scsi_host_add. 951 * - Enables interrupts, and starts the chip by kicking off the 952 * HW state machine. 953 * - Once hardware is ready, initiated scan of the host via 954 * scsi_scan_host. 955 */ 956 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 957 { 958 int rv; 959 int bars; 960 int i; 961 struct csio_hw *hw; 962 struct csio_lnode *ln; 963 964 rv = csio_pci_init(pdev, &bars); 965 if (rv) 966 goto err; 967 968 hw = csio_hw_alloc(pdev); 969 if (!hw) { 970 rv = -ENODEV; 971 goto err_pci_exit; 972 } 973 974 pci_set_drvdata(pdev, hw); 975 976 if (csio_hw_start(hw) != 0) { 977 dev_err(&pdev->dev, 978 "Failed to start FW, continuing in debug mode.\n"); 979 return 0; 980 } 981 982 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 983 FW_HDR_FW_VER_MAJOR_GET(hw->fwrev), 984 FW_HDR_FW_VER_MINOR_GET(hw->fwrev), 985 FW_HDR_FW_VER_MICRO_GET(hw->fwrev), 986 FW_HDR_FW_VER_BUILD_GET(hw->fwrev)); 987 988 for (i = 0; i < hw->num_pports; i++) { 989 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 990 if (!ln) { 991 rv = -ENODEV; 992 break; 993 } 994 /* Initialize portid */ 995 ln->portid = hw->pport[i].portid; 996 997 spin_lock_irq(&hw->lock); 998 if (csio_lnode_start(ln) != 0) 999 rv = -ENODEV; 1000 spin_unlock_irq(&hw->lock); 1001 1002 if (rv) 1003 break; 1004 1005 csio_lnode_init_post(ln); 1006 } 1007 1008 if (rv) 1009 goto err_lnode_exit; 1010 1011 return 0; 1012 1013 err_lnode_exit: 1014 csio_lnodes_block_request(hw); 1015 spin_lock_irq(&hw->lock); 1016 csio_hw_stop(hw); 1017 spin_unlock_irq(&hw->lock); 1018 csio_lnodes_unblock_request(hw); 1019 pci_set_drvdata(hw->pdev, NULL); 1020 csio_lnodes_exit(hw, 0); 1021 csio_hw_free(hw); 1022 err_pci_exit: 1023 csio_pci_exit(pdev, &bars); 1024 err: 1025 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1026 return rv; 1027 } 1028 1029 /* 1030 * csio_remove_one - Remove one instance of the driver at this PCI function. 1031 * @pdev: PCI device 1032 * 1033 * Used during hotplug operation. 1034 */ 1035 static void csio_remove_one(struct pci_dev *pdev) 1036 { 1037 struct csio_hw *hw = pci_get_drvdata(pdev); 1038 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1039 1040 csio_lnodes_block_request(hw); 1041 spin_lock_irq(&hw->lock); 1042 1043 /* Stops lnode, Rnode s/m 1044 * Quiesce IOs. 1045 * All sessions with remote ports are unregistered. 1046 */ 1047 csio_hw_stop(hw); 1048 spin_unlock_irq(&hw->lock); 1049 csio_lnodes_unblock_request(hw); 1050 1051 csio_lnodes_exit(hw, 0); 1052 csio_hw_free(hw); 1053 pci_set_drvdata(pdev, NULL); 1054 csio_pci_exit(pdev, &bars); 1055 } 1056 1057 /* 1058 * csio_pci_error_detected - PCI error was detected 1059 * @pdev: PCI device 1060 * 1061 */ 1062 static pci_ers_result_t 1063 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1064 { 1065 struct csio_hw *hw = pci_get_drvdata(pdev); 1066 1067 csio_lnodes_block_request(hw); 1068 spin_lock_irq(&hw->lock); 1069 1070 /* Post PCI error detected evt to HW s/m 1071 * HW s/m handles this evt by quiescing IOs, unregisters rports 1072 * and finally takes the device to offline. 1073 */ 1074 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1075 spin_unlock_irq(&hw->lock); 1076 csio_lnodes_unblock_request(hw); 1077 csio_lnodes_exit(hw, 0); 1078 csio_intr_disable(hw, true); 1079 pci_disable_device(pdev); 1080 return state == pci_channel_io_perm_failure ? 1081 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1082 } 1083 1084 /* 1085 * csio_pci_slot_reset - PCI slot has been reset. 1086 * @pdev: PCI device 1087 * 1088 */ 1089 static pci_ers_result_t 1090 csio_pci_slot_reset(struct pci_dev *pdev) 1091 { 1092 struct csio_hw *hw = pci_get_drvdata(pdev); 1093 int ready; 1094 1095 if (pci_enable_device(pdev)) { 1096 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1097 return PCI_ERS_RESULT_DISCONNECT; 1098 } 1099 1100 pci_set_master(pdev); 1101 pci_restore_state(pdev); 1102 pci_save_state(pdev); 1103 pci_cleanup_aer_uncorrect_error_status(pdev); 1104 1105 /* Bring HW s/m to ready state. 1106 * but don't resume IOs. 1107 */ 1108 spin_lock_irq(&hw->lock); 1109 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1110 ready = csio_is_hw_ready(hw); 1111 spin_unlock_irq(&hw->lock); 1112 1113 if (ready) { 1114 return PCI_ERS_RESULT_RECOVERED; 1115 } else { 1116 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1117 return PCI_ERS_RESULT_DISCONNECT; 1118 } 1119 } 1120 1121 /* 1122 * csio_pci_resume - Resume normal operations 1123 * @pdev: PCI device 1124 * 1125 */ 1126 static void 1127 csio_pci_resume(struct pci_dev *pdev) 1128 { 1129 struct csio_hw *hw = pci_get_drvdata(pdev); 1130 struct csio_lnode *ln; 1131 int rv = 0; 1132 int i; 1133 1134 /* Bring the LINK UP and Resume IO */ 1135 1136 for (i = 0; i < hw->num_pports; i++) { 1137 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1138 if (!ln) { 1139 rv = -ENODEV; 1140 break; 1141 } 1142 /* Initialize portid */ 1143 ln->portid = hw->pport[i].portid; 1144 1145 spin_lock_irq(&hw->lock); 1146 if (csio_lnode_start(ln) != 0) 1147 rv = -ENODEV; 1148 spin_unlock_irq(&hw->lock); 1149 1150 if (rv) 1151 break; 1152 1153 csio_lnode_init_post(ln); 1154 } 1155 1156 if (rv) 1157 goto err_resume_exit; 1158 1159 return; 1160 1161 err_resume_exit: 1162 csio_lnodes_block_request(hw); 1163 spin_lock_irq(&hw->lock); 1164 csio_hw_stop(hw); 1165 spin_unlock_irq(&hw->lock); 1166 csio_lnodes_unblock_request(hw); 1167 csio_lnodes_exit(hw, 0); 1168 csio_hw_free(hw); 1169 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1170 } 1171 1172 static struct pci_error_handlers csio_err_handler = { 1173 .error_detected = csio_pci_error_detected, 1174 .slot_reset = csio_pci_slot_reset, 1175 .resume = csio_pci_resume, 1176 }; 1177 1178 static DEFINE_PCI_DEVICE_TABLE(csio_pci_tbl) = { 1179 CSIO_DEVICE(CSIO_DEVID_T440DBG_FCOE, 0), /* T440DBG FCOE */ 1180 CSIO_DEVICE(CSIO_DEVID_T420CR_FCOE, 0), /* T420CR FCOE */ 1181 CSIO_DEVICE(CSIO_DEVID_T422CR_FCOE, 0), /* T422CR FCOE */ 1182 CSIO_DEVICE(CSIO_DEVID_T440CR_FCOE, 0), /* T440CR FCOE */ 1183 CSIO_DEVICE(CSIO_DEVID_T420BCH_FCOE, 0), /* T420BCH FCOE */ 1184 CSIO_DEVICE(CSIO_DEVID_T440BCH_FCOE, 0), /* T440BCH FCOE */ 1185 CSIO_DEVICE(CSIO_DEVID_T440CH_FCOE, 0), /* T440CH FCOE */ 1186 CSIO_DEVICE(CSIO_DEVID_T420SO_FCOE, 0), /* T420SO FCOE */ 1187 CSIO_DEVICE(CSIO_DEVID_T420CX_FCOE, 0), /* T420CX FCOE */ 1188 CSIO_DEVICE(CSIO_DEVID_T420BT_FCOE, 0), /* T420BT FCOE */ 1189 CSIO_DEVICE(CSIO_DEVID_T404BT_FCOE, 0), /* T404BT FCOE */ 1190 CSIO_DEVICE(CSIO_DEVID_B420_FCOE, 0), /* B420 FCOE */ 1191 CSIO_DEVICE(CSIO_DEVID_B404_FCOE, 0), /* B404 FCOE */ 1192 CSIO_DEVICE(CSIO_DEVID_T480CR_FCOE, 0), /* T480 CR FCOE */ 1193 CSIO_DEVICE(CSIO_DEVID_T440LPCR_FCOE, 0), /* T440 LP-CR FCOE */ 1194 CSIO_DEVICE(CSIO_DEVID_PE10K, 0), /* PE10K FCOE */ 1195 CSIO_DEVICE(CSIO_DEVID_PE10K_PF1, 0), /* PE10K FCOE on PF1 */ 1196 { 0, 0, 0, 0, 0, 0, 0 } 1197 }; 1198 1199 1200 static struct pci_driver csio_pci_driver = { 1201 .name = KBUILD_MODNAME, 1202 .driver = { 1203 .owner = THIS_MODULE, 1204 }, 1205 .id_table = csio_pci_tbl, 1206 .probe = csio_probe_one, 1207 .remove = csio_remove_one, 1208 .err_handler = &csio_err_handler, 1209 }; 1210 1211 /* 1212 * csio_init - Chelsio storage driver initialization function. 1213 * 1214 */ 1215 static int __init 1216 csio_init(void) 1217 { 1218 int rv = -ENOMEM; 1219 1220 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1221 1222 csio_dfs_init(); 1223 1224 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1225 if (!csio_fcoe_transport) 1226 goto err; 1227 1228 csio_fcoe_transport_vport = 1229 fc_attach_transport(&csio_fc_transport_vport_funcs); 1230 if (!csio_fcoe_transport_vport) 1231 goto err_vport; 1232 1233 rv = pci_register_driver(&csio_pci_driver); 1234 if (rv) 1235 goto err_pci; 1236 1237 return 0; 1238 1239 err_pci: 1240 fc_release_transport(csio_fcoe_transport_vport); 1241 err_vport: 1242 fc_release_transport(csio_fcoe_transport); 1243 err: 1244 csio_dfs_exit(); 1245 return rv; 1246 } 1247 1248 /* 1249 * csio_exit - Chelsio storage driver uninitialization . 1250 * 1251 * Function that gets called in the unload path. 1252 */ 1253 static void __exit 1254 csio_exit(void) 1255 { 1256 pci_unregister_driver(&csio_pci_driver); 1257 csio_dfs_exit(); 1258 fc_release_transport(csio_fcoe_transport_vport); 1259 fc_release_transport(csio_fcoe_transport); 1260 } 1261 1262 module_init(csio_init); 1263 module_exit(csio_exit); 1264 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1265 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1266 MODULE_LICENSE(CSIO_DRV_LICENSE); 1267 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1268 MODULE_VERSION(CSIO_DRV_VERSION); 1269 MODULE_FIRMWARE(CSIO_FW_FNAME); 1270