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 __devinit 119 csio_add_debugfs_mem(struct csio_hw *hw, const char *name, 120 unsigned int idx, unsigned int size_mb) 121 { 122 struct dentry *de; 123 124 de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root, 125 (void *)hw + idx, &csio_mem_debugfs_fops); 126 if (de && de->d_inode) 127 de->d_inode->i_size = size_mb << 20; 128 } 129 130 static int __devinit 131 csio_setup_debugfs(struct csio_hw *hw) 132 { 133 int i; 134 135 if (IS_ERR_OR_NULL(hw->debugfs_root)) 136 return -1; 137 138 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE); 139 if (i & EDRAM0_ENABLE) 140 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); 141 if (i & EDRAM1_ENABLE) 142 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); 143 if (i & EXT_MEM_ENABLE) 144 csio_add_debugfs_mem(hw, "mc", MEM_MC, 145 EXT_MEM_SIZE_GET(csio_rd_reg32(hw, MA_EXT_MEMORY_BAR))); 146 return 0; 147 } 148 149 /* 150 * csio_dfs_create - Creates and sets up per-hw debugfs. 151 * 152 */ 153 static int 154 csio_dfs_create(struct csio_hw *hw) 155 { 156 if (csio_debugfs_root) { 157 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), 158 csio_debugfs_root); 159 csio_setup_debugfs(hw); 160 } 161 162 return 0; 163 } 164 165 /* 166 * csio_dfs_destroy - Destroys per-hw debugfs. 167 */ 168 static int 169 csio_dfs_destroy(struct csio_hw *hw) 170 { 171 if (hw->debugfs_root) 172 debugfs_remove_recursive(hw->debugfs_root); 173 174 return 0; 175 } 176 177 /* 178 * csio_dfs_init - Debug filesystem initialization for the module. 179 * 180 */ 181 static int 182 csio_dfs_init(void) 183 { 184 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 185 if (!csio_debugfs_root) 186 pr_warn("Could not create debugfs entry, continuing\n"); 187 188 return 0; 189 } 190 191 /* 192 * csio_dfs_exit - debugfs cleanup for the module. 193 */ 194 static void 195 csio_dfs_exit(void) 196 { 197 debugfs_remove(csio_debugfs_root); 198 } 199 200 /* 201 * csio_pci_init - PCI initialization. 202 * @pdev: PCI device. 203 * @bars: Bitmask of bars to be requested. 204 * 205 * Initializes the PCI function by enabling MMIO, setting bus 206 * mastership and setting DMA mask. 207 */ 208 static int 209 csio_pci_init(struct pci_dev *pdev, int *bars) 210 { 211 int rv = -ENODEV; 212 213 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 214 215 if (pci_enable_device_mem(pdev)) 216 goto err; 217 218 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 219 goto err_disable_device; 220 221 pci_set_master(pdev); 222 pci_try_set_mwi(pdev); 223 224 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 225 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 226 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { 227 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 228 } else { 229 dev_err(&pdev->dev, "No suitable DMA available.\n"); 230 goto err_release_regions; 231 } 232 233 return 0; 234 235 err_release_regions: 236 pci_release_selected_regions(pdev, *bars); 237 err_disable_device: 238 pci_disable_device(pdev); 239 err: 240 return rv; 241 242 } 243 244 /* 245 * csio_pci_exit - PCI unitialization. 246 * @pdev: PCI device. 247 * @bars: Bars to be released. 248 * 249 */ 250 static void 251 csio_pci_exit(struct pci_dev *pdev, int *bars) 252 { 253 pci_release_selected_regions(pdev, *bars); 254 pci_disable_device(pdev); 255 } 256 257 /* 258 * csio_hw_init_workers - Initialize the HW module's worker threads. 259 * @hw: HW module. 260 * 261 */ 262 static void 263 csio_hw_init_workers(struct csio_hw *hw) 264 { 265 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 266 } 267 268 static void 269 csio_hw_exit_workers(struct csio_hw *hw) 270 { 271 cancel_work_sync(&hw->evtq_work); 272 flush_scheduled_work(); 273 } 274 275 static int 276 csio_create_queues(struct csio_hw *hw) 277 { 278 int i, j; 279 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 280 int rv; 281 struct csio_scsi_cpu_info *info; 282 283 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 284 return 0; 285 286 if (hw->intr_mode != CSIO_IM_MSIX) { 287 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 288 0, hw->pport[0].portid, false, NULL); 289 if (rv != 0) { 290 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 291 return rv; 292 } 293 } 294 295 /* FW event queue */ 296 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 297 csio_get_fwevt_intr_idx(hw), 298 hw->pport[0].portid, true, NULL); 299 if (rv != 0) { 300 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 301 return rv; 302 } 303 304 /* Create mgmt queue */ 305 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 306 mgmtm->iq_idx, hw->pport[0].portid, NULL); 307 308 if (rv != 0) { 309 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 310 goto err; 311 } 312 313 /* Create SCSI queues */ 314 for (i = 0; i < hw->num_pports; i++) { 315 info = &hw->scsi_cpu_info[i]; 316 317 for (j = 0; j < info->max_cpus; j++) { 318 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 319 320 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 321 sqset->intr_idx, i, false, NULL); 322 if (rv != 0) { 323 csio_err(hw, 324 "SCSI module IQ config failed [%d][%d]:%d\n", 325 i, j, rv); 326 goto err; 327 } 328 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 329 sqset->iq_idx, i, NULL); 330 if (rv != 0) { 331 csio_err(hw, 332 "SCSI module EQ config failed [%d][%d]:%d\n", 333 i, j, rv); 334 goto err; 335 } 336 } /* for all CPUs */ 337 } /* For all ports */ 338 339 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 340 return 0; 341 err: 342 csio_wr_destroy_queues(hw, true); 343 return -EINVAL; 344 } 345 346 /* 347 * csio_config_queues - Configure the DMA queues. 348 * @hw: HW module. 349 * 350 * Allocates memory for queues are registers them with FW. 351 */ 352 int 353 csio_config_queues(struct csio_hw *hw) 354 { 355 int i, j, idx, k = 0; 356 int rv; 357 struct csio_scsi_qset *sqset; 358 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 359 struct csio_scsi_qset *orig; 360 struct csio_scsi_cpu_info *info; 361 362 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 363 return csio_create_queues(hw); 364 365 /* Calculate number of SCSI queues for MSIX we would like */ 366 hw->num_scsi_msix_cpus = num_online_cpus(); 367 hw->num_sqsets = num_online_cpus() * hw->num_pports; 368 369 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 370 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 371 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 372 } 373 374 /* Initialize max_cpus, may get reduced during msix allocations */ 375 for (i = 0; i < hw->num_pports; i++) 376 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 377 378 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 379 hw->num_sqsets, hw->num_scsi_msix_cpus); 380 381 csio_intr_enable(hw); 382 383 if (hw->intr_mode != CSIO_IM_MSIX) { 384 385 /* Allocate Forward interrupt iq. */ 386 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 387 CSIO_INTR_WRSIZE, CSIO_INGRESS, 388 (void *)hw, 0, 0, NULL); 389 if (hw->intr_iq_idx == -1) { 390 csio_err(hw, 391 "Forward interrupt queue creation failed\n"); 392 goto intr_disable; 393 } 394 } 395 396 /* Allocate the FW evt queue */ 397 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 398 CSIO_FWEVT_WRSIZE, 399 CSIO_INGRESS, (void *)hw, 400 CSIO_FWEVT_FLBUFS, 0, 401 csio_fwevt_intx_handler); 402 if (hw->fwevt_iq_idx == -1) { 403 csio_err(hw, "FW evt queue creation failed\n"); 404 goto intr_disable; 405 } 406 407 /* Allocate the mgmt queue */ 408 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 409 CSIO_MGMT_EQ_WRSIZE, 410 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 411 if (mgmtm->eq_idx == -1) { 412 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 413 goto intr_disable; 414 } 415 416 /* Use FW IQ for MGMT req completion */ 417 mgmtm->iq_idx = hw->fwevt_iq_idx; 418 419 /* Allocate SCSI queues */ 420 for (i = 0; i < hw->num_pports; i++) { 421 info = &hw->scsi_cpu_info[i]; 422 423 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 424 sqset = &hw->sqset[i][j]; 425 426 if (j >= info->max_cpus) { 427 k = j % info->max_cpus; 428 orig = &hw->sqset[i][k]; 429 sqset->eq_idx = orig->eq_idx; 430 sqset->iq_idx = orig->iq_idx; 431 continue; 432 } 433 434 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 435 CSIO_EGRESS, (void *)hw, 0, 0, 436 NULL); 437 if (idx == -1) { 438 csio_err(hw, "EQ creation failed for idx:%d\n", 439 idx); 440 goto intr_disable; 441 } 442 443 sqset->eq_idx = idx; 444 445 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 446 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 447 (void *)hw, 0, 0, 448 csio_scsi_intx_handler); 449 if (idx == -1) { 450 csio_err(hw, "IQ creation failed for idx:%d\n", 451 idx); 452 goto intr_disable; 453 } 454 sqset->iq_idx = idx; 455 } /* for all CPUs */ 456 } /* For all ports */ 457 458 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 459 460 rv = csio_create_queues(hw); 461 if (rv != 0) 462 goto intr_disable; 463 464 /* 465 * Now request IRQs for the vectors. In the event of a failure, 466 * cleanup is handled internally by this function. 467 */ 468 rv = csio_request_irqs(hw); 469 if (rv != 0) 470 return -EINVAL; 471 472 return 0; 473 474 intr_disable: 475 csio_intr_disable(hw, false); 476 477 return -EINVAL; 478 } 479 480 static int 481 csio_resource_alloc(struct csio_hw *hw) 482 { 483 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 484 int rv = -ENOMEM; 485 486 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 487 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 488 489 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 490 sizeof(struct csio_mb)); 491 if (!hw->mb_mempool) 492 goto err; 493 494 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 495 sizeof(struct csio_rnode)); 496 if (!hw->rnode_mempool) 497 goto err_free_mb_mempool; 498 499 hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev, 500 CSIO_SCSI_RSP_LEN, 8, 0); 501 if (!hw->scsi_pci_pool) 502 goto err_free_rn_pool; 503 504 return 0; 505 506 err_free_rn_pool: 507 mempool_destroy(hw->rnode_mempool); 508 hw->rnode_mempool = NULL; 509 err_free_mb_mempool: 510 mempool_destroy(hw->mb_mempool); 511 hw->mb_mempool = NULL; 512 err: 513 return rv; 514 } 515 516 static void 517 csio_resource_free(struct csio_hw *hw) 518 { 519 pci_pool_destroy(hw->scsi_pci_pool); 520 hw->scsi_pci_pool = NULL; 521 mempool_destroy(hw->rnode_mempool); 522 hw->rnode_mempool = NULL; 523 mempool_destroy(hw->mb_mempool); 524 hw->mb_mempool = NULL; 525 } 526 527 /* 528 * csio_hw_alloc - Allocate and initialize the HW module. 529 * @pdev: PCI device. 530 * 531 * Allocates HW structure, DMA, memory resources, maps BARS to 532 * host memory and initializes HW module. 533 */ 534 static struct csio_hw * __devinit 535 csio_hw_alloc(struct pci_dev *pdev) 536 { 537 struct csio_hw *hw; 538 539 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 540 if (!hw) 541 goto err; 542 543 hw->pdev = pdev; 544 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 545 546 /* memory pool/DMA pool allocation */ 547 if (csio_resource_alloc(hw)) 548 goto err_free_hw; 549 550 /* Get the start address of registers from BAR 0 */ 551 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 552 pci_resource_len(pdev, 0)); 553 if (!hw->regstart) { 554 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 555 hw->regstart); 556 goto err_resource_free; 557 } 558 559 csio_hw_init_workers(hw); 560 561 if (csio_hw_init(hw)) 562 goto err_unmap_bar; 563 564 csio_dfs_create(hw); 565 566 csio_dbg(hw, "hw:%p\n", hw); 567 568 return hw; 569 570 err_unmap_bar: 571 csio_hw_exit_workers(hw); 572 iounmap(hw->regstart); 573 err_resource_free: 574 csio_resource_free(hw); 575 err_free_hw: 576 kfree(hw); 577 err: 578 return NULL; 579 } 580 581 /* 582 * csio_hw_free - Uninitialize and free the HW module. 583 * @hw: The HW module 584 * 585 * Disable interrupts, uninit the HW module, free resources, free hw. 586 */ 587 static void 588 csio_hw_free(struct csio_hw *hw) 589 { 590 csio_intr_disable(hw, true); 591 csio_hw_exit_workers(hw); 592 csio_hw_exit(hw); 593 iounmap(hw->regstart); 594 csio_dfs_destroy(hw); 595 csio_resource_free(hw); 596 kfree(hw); 597 } 598 599 /** 600 * csio_shost_init - Create and initialize the lnode module. 601 * @hw: The HW module. 602 * @dev: The device associated with this invocation. 603 * @probe: Called from probe context or not? 604 * @os_pln: Parent lnode if any. 605 * 606 * Allocates lnode structure via scsi_host_alloc, initializes 607 * shost, initializes lnode module and registers with SCSI ML 608 * via scsi_host_add. This function is shared between physical and 609 * virtual node ports. 610 */ 611 struct csio_lnode * 612 csio_shost_init(struct csio_hw *hw, struct device *dev, 613 bool probe, struct csio_lnode *pln) 614 { 615 struct Scsi_Host *shost = NULL; 616 struct csio_lnode *ln; 617 618 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 619 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 620 621 /* 622 * hw->pdev is the physical port's PCI dev structure, 623 * which will be different from the NPIV dev structure. 624 */ 625 if (dev == &hw->pdev->dev) 626 shost = scsi_host_alloc( 627 &csio_fcoe_shost_template, 628 sizeof(struct csio_lnode)); 629 else 630 shost = scsi_host_alloc( 631 &csio_fcoe_shost_vport_template, 632 sizeof(struct csio_lnode)); 633 634 if (!shost) 635 goto err; 636 637 ln = shost_priv(shost); 638 memset(ln, 0, sizeof(struct csio_lnode)); 639 640 /* Link common lnode to this lnode */ 641 ln->dev_num = (shost->host_no << 16); 642 643 shost->can_queue = CSIO_MAX_QUEUE; 644 shost->this_id = -1; 645 shost->unique_id = shost->host_no; 646 shost->max_cmd_len = 16; /* Max CDB length supported */ 647 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 648 hw->fres_info.max_ssns); 649 shost->max_lun = CSIO_MAX_LUN; 650 if (dev == &hw->pdev->dev) 651 shost->transportt = csio_fcoe_transport; 652 else 653 shost->transportt = csio_fcoe_transport_vport; 654 655 /* root lnode */ 656 if (!hw->rln) 657 hw->rln = ln; 658 659 /* Other initialization here: Common, Transport specific */ 660 if (csio_lnode_init(ln, hw, pln)) 661 goto err_shost_put; 662 663 if (scsi_add_host(shost, dev)) 664 goto err_lnode_exit; 665 666 return ln; 667 668 err_lnode_exit: 669 csio_lnode_exit(ln); 670 err_shost_put: 671 scsi_host_put(shost); 672 err: 673 return NULL; 674 } 675 676 /** 677 * csio_shost_exit - De-instantiate the shost. 678 * @ln: The lnode module corresponding to the shost. 679 * 680 */ 681 void 682 csio_shost_exit(struct csio_lnode *ln) 683 { 684 struct Scsi_Host *shost = csio_ln_to_shost(ln); 685 struct csio_hw *hw = csio_lnode_to_hw(ln); 686 687 /* Inform transport */ 688 fc_remove_host(shost); 689 690 /* Inform SCSI ML */ 691 scsi_remove_host(shost); 692 693 /* Flush all the events, so that any rnode removal events 694 * already queued are all handled, before we remove the lnode. 695 */ 696 spin_lock_irq(&hw->lock); 697 csio_evtq_flush(hw); 698 spin_unlock_irq(&hw->lock); 699 700 csio_lnode_exit(ln); 701 scsi_host_put(shost); 702 } 703 704 struct csio_lnode * 705 csio_lnode_alloc(struct csio_hw *hw) 706 { 707 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 708 } 709 710 void 711 csio_lnodes_block_request(struct csio_hw *hw) 712 { 713 struct Scsi_Host *shost; 714 struct csio_lnode *sln; 715 struct csio_lnode *ln; 716 struct list_head *cur_ln, *cur_cln; 717 struct csio_lnode **lnode_list; 718 int cur_cnt = 0, ii; 719 720 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 721 GFP_KERNEL); 722 if (!lnode_list) { 723 csio_err(hw, "Failed to allocate lnodes_list"); 724 return; 725 } 726 727 spin_lock_irq(&hw->lock); 728 /* Traverse sibling lnodes */ 729 list_for_each(cur_ln, &hw->sln_head) { 730 sln = (struct csio_lnode *) cur_ln; 731 lnode_list[cur_cnt++] = sln; 732 733 /* Traverse children lnodes */ 734 list_for_each(cur_cln, &sln->cln_head) 735 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 736 } 737 spin_unlock_irq(&hw->lock); 738 739 for (ii = 0; ii < cur_cnt; ii++) { 740 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 741 ln = lnode_list[ii]; 742 shost = csio_ln_to_shost(ln); 743 scsi_block_requests(shost); 744 745 } 746 kfree(lnode_list); 747 } 748 749 void 750 csio_lnodes_unblock_request(struct csio_hw *hw) 751 { 752 struct csio_lnode *ln; 753 struct Scsi_Host *shost; 754 struct csio_lnode *sln; 755 struct list_head *cur_ln, *cur_cln; 756 struct csio_lnode **lnode_list; 757 int cur_cnt = 0, ii; 758 759 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 760 GFP_KERNEL); 761 if (!lnode_list) { 762 csio_err(hw, "Failed to allocate lnodes_list"); 763 return; 764 } 765 766 spin_lock_irq(&hw->lock); 767 /* Traverse sibling lnodes */ 768 list_for_each(cur_ln, &hw->sln_head) { 769 sln = (struct csio_lnode *) cur_ln; 770 lnode_list[cur_cnt++] = sln; 771 772 /* Traverse children lnodes */ 773 list_for_each(cur_cln, &sln->cln_head) 774 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 775 } 776 spin_unlock_irq(&hw->lock); 777 778 for (ii = 0; ii < cur_cnt; ii++) { 779 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 780 ln = lnode_list[ii]; 781 shost = csio_ln_to_shost(ln); 782 scsi_unblock_requests(shost); 783 } 784 kfree(lnode_list); 785 } 786 787 void 788 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 789 { 790 struct csio_lnode *ln; 791 struct Scsi_Host *shost; 792 struct csio_lnode *sln; 793 struct list_head *cur_ln, *cur_cln; 794 struct csio_lnode **lnode_list; 795 int cur_cnt = 0, ii; 796 797 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 798 GFP_KERNEL); 799 if (!lnode_list) { 800 csio_err(hw, "Failed to allocate lnodes_list"); 801 return; 802 } 803 804 spin_lock_irq(&hw->lock); 805 /* Traverse sibling lnodes */ 806 list_for_each(cur_ln, &hw->sln_head) { 807 sln = (struct csio_lnode *) cur_ln; 808 if (sln->portid != portid) 809 continue; 810 811 lnode_list[cur_cnt++] = sln; 812 813 /* Traverse children lnodes */ 814 list_for_each(cur_cln, &sln->cln_head) 815 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 816 } 817 spin_unlock_irq(&hw->lock); 818 819 for (ii = 0; ii < cur_cnt; ii++) { 820 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 821 ln = lnode_list[ii]; 822 shost = csio_ln_to_shost(ln); 823 scsi_block_requests(shost); 824 } 825 kfree(lnode_list); 826 } 827 828 void 829 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 830 { 831 struct csio_lnode *ln; 832 struct Scsi_Host *shost; 833 struct csio_lnode *sln; 834 struct list_head *cur_ln, *cur_cln; 835 struct csio_lnode **lnode_list; 836 int cur_cnt = 0, ii; 837 838 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 839 GFP_KERNEL); 840 if (!lnode_list) { 841 csio_err(hw, "Failed to allocate lnodes_list"); 842 return; 843 } 844 845 spin_lock_irq(&hw->lock); 846 /* Traverse sibling lnodes */ 847 list_for_each(cur_ln, &hw->sln_head) { 848 sln = (struct csio_lnode *) cur_ln; 849 if (sln->portid != portid) 850 continue; 851 lnode_list[cur_cnt++] = sln; 852 853 /* Traverse children lnodes */ 854 list_for_each(cur_cln, &sln->cln_head) 855 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 856 } 857 spin_unlock_irq(&hw->lock); 858 859 for (ii = 0; ii < cur_cnt; ii++) { 860 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 861 ln = lnode_list[ii]; 862 shost = csio_ln_to_shost(ln); 863 scsi_unblock_requests(shost); 864 } 865 kfree(lnode_list); 866 } 867 868 void 869 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 870 { 871 struct csio_lnode *sln; 872 struct csio_lnode *ln; 873 struct list_head *cur_ln, *cur_cln; 874 struct csio_lnode **lnode_list; 875 int cur_cnt = 0, ii; 876 877 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 878 GFP_KERNEL); 879 if (!lnode_list) { 880 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 881 return; 882 } 883 884 /* Get all child lnodes(NPIV ports) */ 885 spin_lock_irq(&hw->lock); 886 list_for_each(cur_ln, &hw->sln_head) { 887 sln = (struct csio_lnode *) cur_ln; 888 889 /* Traverse children lnodes */ 890 list_for_each(cur_cln, &sln->cln_head) 891 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 892 } 893 spin_unlock_irq(&hw->lock); 894 895 /* Delete NPIV lnodes */ 896 for (ii = 0; ii < cur_cnt; ii++) { 897 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 898 ln = lnode_list[ii]; 899 fc_vport_terminate(ln->fc_vport); 900 } 901 902 /* Delete only npiv lnodes */ 903 if (npiv) 904 goto free_lnodes; 905 906 cur_cnt = 0; 907 /* Get all physical lnodes */ 908 spin_lock_irq(&hw->lock); 909 /* Traverse sibling lnodes */ 910 list_for_each(cur_ln, &hw->sln_head) { 911 sln = (struct csio_lnode *) cur_ln; 912 lnode_list[cur_cnt++] = sln; 913 } 914 spin_unlock_irq(&hw->lock); 915 916 /* Delete physical lnodes */ 917 for (ii = 0; ii < cur_cnt; ii++) { 918 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 919 csio_shost_exit(lnode_list[ii]); 920 } 921 922 free_lnodes: 923 kfree(lnode_list); 924 } 925 926 /* 927 * csio_lnode_init_post: Set lnode attributes after starting HW. 928 * @ln: lnode. 929 * 930 */ 931 static void 932 csio_lnode_init_post(struct csio_lnode *ln) 933 { 934 struct Scsi_Host *shost = csio_ln_to_shost(ln); 935 936 csio_fchost_attr_init(ln); 937 938 scsi_scan_host(shost); 939 } 940 941 /* 942 * csio_probe_one - Instantiate this function. 943 * @pdev: PCI device 944 * @id: Device ID 945 * 946 * This is the .probe() callback of the driver. This function: 947 * - Initializes the PCI function by enabling MMIO, setting bus 948 * mastership and setting DMA mask. 949 * - Allocates HW structure, DMA, memory resources, maps BARS to 950 * host memory and initializes HW module. 951 * - Allocates lnode structure via scsi_host_alloc, initializes 952 * shost, initialized lnode module and registers with SCSI ML 953 * via scsi_host_add. 954 * - Enables interrupts, and starts the chip by kicking off the 955 * HW state machine. 956 * - Once hardware is ready, initiated scan of the host via 957 * scsi_scan_host. 958 */ 959 static int __devinit 960 csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 961 { 962 int rv; 963 int bars; 964 int i; 965 struct csio_hw *hw; 966 struct csio_lnode *ln; 967 968 rv = csio_pci_init(pdev, &bars); 969 if (rv) 970 goto err; 971 972 hw = csio_hw_alloc(pdev); 973 if (!hw) { 974 rv = -ENODEV; 975 goto err_pci_exit; 976 } 977 978 pci_set_drvdata(pdev, hw); 979 980 if (csio_hw_start(hw) != 0) { 981 dev_err(&pdev->dev, 982 "Failed to start FW, continuing in debug mode.\n"); 983 return 0; 984 } 985 986 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 987 FW_HDR_FW_VER_MAJOR_GET(hw->fwrev), 988 FW_HDR_FW_VER_MINOR_GET(hw->fwrev), 989 FW_HDR_FW_VER_MICRO_GET(hw->fwrev), 990 FW_HDR_FW_VER_BUILD_GET(hw->fwrev)); 991 992 for (i = 0; i < hw->num_pports; i++) { 993 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 994 if (!ln) { 995 rv = -ENODEV; 996 break; 997 } 998 /* Initialize portid */ 999 ln->portid = hw->pport[i].portid; 1000 1001 spin_lock_irq(&hw->lock); 1002 if (csio_lnode_start(ln) != 0) 1003 rv = -ENODEV; 1004 spin_unlock_irq(&hw->lock); 1005 1006 if (rv) 1007 break; 1008 1009 csio_lnode_init_post(ln); 1010 } 1011 1012 if (rv) 1013 goto err_lnode_exit; 1014 1015 return 0; 1016 1017 err_lnode_exit: 1018 csio_lnodes_block_request(hw); 1019 spin_lock_irq(&hw->lock); 1020 csio_hw_stop(hw); 1021 spin_unlock_irq(&hw->lock); 1022 csio_lnodes_unblock_request(hw); 1023 pci_set_drvdata(hw->pdev, NULL); 1024 csio_lnodes_exit(hw, 0); 1025 csio_hw_free(hw); 1026 err_pci_exit: 1027 csio_pci_exit(pdev, &bars); 1028 err: 1029 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1030 return rv; 1031 } 1032 1033 /* 1034 * csio_remove_one - Remove one instance of the driver at this PCI function. 1035 * @pdev: PCI device 1036 * 1037 * Used during hotplug operation. 1038 */ 1039 static void __devexit 1040 csio_remove_one(struct pci_dev *pdev) 1041 { 1042 struct csio_hw *hw = pci_get_drvdata(pdev); 1043 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1044 1045 csio_lnodes_block_request(hw); 1046 spin_lock_irq(&hw->lock); 1047 1048 /* Stops lnode, Rnode s/m 1049 * Quiesce IOs. 1050 * All sessions with remote ports are unregistered. 1051 */ 1052 csio_hw_stop(hw); 1053 spin_unlock_irq(&hw->lock); 1054 csio_lnodes_unblock_request(hw); 1055 1056 csio_lnodes_exit(hw, 0); 1057 csio_hw_free(hw); 1058 pci_set_drvdata(pdev, NULL); 1059 csio_pci_exit(pdev, &bars); 1060 } 1061 1062 /* 1063 * csio_pci_error_detected - PCI error was detected 1064 * @pdev: PCI device 1065 * 1066 */ 1067 static pci_ers_result_t 1068 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1069 { 1070 struct csio_hw *hw = pci_get_drvdata(pdev); 1071 1072 csio_lnodes_block_request(hw); 1073 spin_lock_irq(&hw->lock); 1074 1075 /* Post PCI error detected evt to HW s/m 1076 * HW s/m handles this evt by quiescing IOs, unregisters rports 1077 * and finally takes the device to offline. 1078 */ 1079 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1080 spin_unlock_irq(&hw->lock); 1081 csio_lnodes_unblock_request(hw); 1082 csio_lnodes_exit(hw, 0); 1083 csio_intr_disable(hw, true); 1084 pci_disable_device(pdev); 1085 return state == pci_channel_io_perm_failure ? 1086 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1087 } 1088 1089 /* 1090 * csio_pci_slot_reset - PCI slot has been reset. 1091 * @pdev: PCI device 1092 * 1093 */ 1094 static pci_ers_result_t 1095 csio_pci_slot_reset(struct pci_dev *pdev) 1096 { 1097 struct csio_hw *hw = pci_get_drvdata(pdev); 1098 int ready; 1099 1100 if (pci_enable_device(pdev)) { 1101 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1102 return PCI_ERS_RESULT_DISCONNECT; 1103 } 1104 1105 pci_set_master(pdev); 1106 pci_restore_state(pdev); 1107 pci_save_state(pdev); 1108 pci_cleanup_aer_uncorrect_error_status(pdev); 1109 1110 /* Bring HW s/m to ready state. 1111 * but don't resume IOs. 1112 */ 1113 spin_lock_irq(&hw->lock); 1114 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1115 ready = csio_is_hw_ready(hw); 1116 spin_unlock_irq(&hw->lock); 1117 1118 if (ready) { 1119 return PCI_ERS_RESULT_RECOVERED; 1120 } else { 1121 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1122 return PCI_ERS_RESULT_DISCONNECT; 1123 } 1124 } 1125 1126 /* 1127 * csio_pci_resume - Resume normal operations 1128 * @pdev: PCI device 1129 * 1130 */ 1131 static void 1132 csio_pci_resume(struct pci_dev *pdev) 1133 { 1134 struct csio_hw *hw = pci_get_drvdata(pdev); 1135 struct csio_lnode *ln; 1136 int rv = 0; 1137 int i; 1138 1139 /* Bring the LINK UP and Resume IO */ 1140 1141 for (i = 0; i < hw->num_pports; i++) { 1142 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1143 if (!ln) { 1144 rv = -ENODEV; 1145 break; 1146 } 1147 /* Initialize portid */ 1148 ln->portid = hw->pport[i].portid; 1149 1150 spin_lock_irq(&hw->lock); 1151 if (csio_lnode_start(ln) != 0) 1152 rv = -ENODEV; 1153 spin_unlock_irq(&hw->lock); 1154 1155 if (rv) 1156 break; 1157 1158 csio_lnode_init_post(ln); 1159 } 1160 1161 if (rv) 1162 goto err_resume_exit; 1163 1164 return; 1165 1166 err_resume_exit: 1167 csio_lnodes_block_request(hw); 1168 spin_lock_irq(&hw->lock); 1169 csio_hw_stop(hw); 1170 spin_unlock_irq(&hw->lock); 1171 csio_lnodes_unblock_request(hw); 1172 csio_lnodes_exit(hw, 0); 1173 csio_hw_free(hw); 1174 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1175 } 1176 1177 static struct pci_error_handlers csio_err_handler = { 1178 .error_detected = csio_pci_error_detected, 1179 .slot_reset = csio_pci_slot_reset, 1180 .resume = csio_pci_resume, 1181 }; 1182 1183 static DEFINE_PCI_DEVICE_TABLE(csio_pci_tbl) = { 1184 CSIO_DEVICE(CSIO_DEVID_T440DBG_FCOE, 0), /* T440DBG FCOE */ 1185 CSIO_DEVICE(CSIO_DEVID_T420CR_FCOE, 0), /* T420CR FCOE */ 1186 CSIO_DEVICE(CSIO_DEVID_T422CR_FCOE, 0), /* T422CR FCOE */ 1187 CSIO_DEVICE(CSIO_DEVID_T440CR_FCOE, 0), /* T440CR FCOE */ 1188 CSIO_DEVICE(CSIO_DEVID_T420BCH_FCOE, 0), /* T420BCH FCOE */ 1189 CSIO_DEVICE(CSIO_DEVID_T440BCH_FCOE, 0), /* T440BCH FCOE */ 1190 CSIO_DEVICE(CSIO_DEVID_T440CH_FCOE, 0), /* T440CH FCOE */ 1191 CSIO_DEVICE(CSIO_DEVID_T420SO_FCOE, 0), /* T420SO FCOE */ 1192 CSIO_DEVICE(CSIO_DEVID_T420CX_FCOE, 0), /* T420CX FCOE */ 1193 CSIO_DEVICE(CSIO_DEVID_T420BT_FCOE, 0), /* T420BT FCOE */ 1194 CSIO_DEVICE(CSIO_DEVID_T404BT_FCOE, 0), /* T404BT FCOE */ 1195 CSIO_DEVICE(CSIO_DEVID_B420_FCOE, 0), /* B420 FCOE */ 1196 CSIO_DEVICE(CSIO_DEVID_B404_FCOE, 0), /* B404 FCOE */ 1197 CSIO_DEVICE(CSIO_DEVID_T480CR_FCOE, 0), /* T480 CR FCOE */ 1198 CSIO_DEVICE(CSIO_DEVID_T440LPCR_FCOE, 0), /* T440 LP-CR FCOE */ 1199 CSIO_DEVICE(CSIO_DEVID_PE10K, 0), /* PE10K FCOE */ 1200 CSIO_DEVICE(CSIO_DEVID_PE10K_PF1, 0), /* PE10K FCOE on PF1 */ 1201 { 0, 0, 0, 0, 0, 0, 0 } 1202 }; 1203 1204 1205 static struct pci_driver csio_pci_driver = { 1206 .name = KBUILD_MODNAME, 1207 .driver = { 1208 .owner = THIS_MODULE, 1209 }, 1210 .id_table = csio_pci_tbl, 1211 .probe = csio_probe_one, 1212 .remove = csio_remove_one, 1213 .err_handler = &csio_err_handler, 1214 }; 1215 1216 /* 1217 * csio_init - Chelsio storage driver initialization function. 1218 * 1219 */ 1220 static int __init 1221 csio_init(void) 1222 { 1223 int rv = -ENOMEM; 1224 1225 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1226 1227 csio_dfs_init(); 1228 1229 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1230 if (!csio_fcoe_transport) 1231 goto err; 1232 1233 csio_fcoe_transport_vport = 1234 fc_attach_transport(&csio_fc_transport_vport_funcs); 1235 if (!csio_fcoe_transport_vport) 1236 goto err_vport; 1237 1238 rv = pci_register_driver(&csio_pci_driver); 1239 if (rv) 1240 goto err_pci; 1241 1242 return 0; 1243 1244 err_pci: 1245 fc_release_transport(csio_fcoe_transport_vport); 1246 err_vport: 1247 fc_release_transport(csio_fcoe_transport); 1248 err: 1249 csio_dfs_exit(); 1250 return rv; 1251 } 1252 1253 /* 1254 * csio_exit - Chelsio storage driver uninitialization . 1255 * 1256 * Function that gets called in the unload path. 1257 */ 1258 static void __exit 1259 csio_exit(void) 1260 { 1261 pci_unregister_driver(&csio_pci_driver); 1262 csio_dfs_exit(); 1263 fc_release_transport(csio_fcoe_transport_vport); 1264 fc_release_transport(csio_fcoe_transport); 1265 } 1266 1267 module_init(csio_init); 1268 module_exit(csio_exit); 1269 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1270 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1271 MODULE_LICENSE(CSIO_DRV_LICENSE); 1272 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1273 MODULE_VERSION(CSIO_DRV_VERSION); 1274 MODULE_FIRMWARE(CSIO_FW_FNAME); 1275