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 = hw->chip_ops->chip_mc_read(hw, 0, pos, 85 data, NULL); 86 else 87 ret = hw->chip_ops->chip_edc_read(hw, mem, pos, 88 data, NULL); 89 if (ret) 90 return ret; 91 92 ofst = pos % sizeof(data); 93 len = min(count, sizeof(data) - ofst); 94 if (copy_to_user(buf, (u8 *)data + ofst, len)) 95 return -EFAULT; 96 97 buf += len; 98 pos += len; 99 count -= len; 100 } 101 count = pos - *ppos; 102 *ppos = pos; 103 return count; 104 } 105 106 static const struct file_operations csio_mem_debugfs_fops = { 107 .owner = THIS_MODULE, 108 .open = simple_open, 109 .read = csio_mem_read, 110 .llseek = default_llseek, 111 }; 112 113 void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, 114 unsigned int idx, unsigned int size_mb) 115 { 116 debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root, 117 (void *)hw + idx, &csio_mem_debugfs_fops, 118 size_mb << 20); 119 } 120 121 static int csio_setup_debugfs(struct csio_hw *hw) 122 { 123 int i; 124 125 if (IS_ERR_OR_NULL(hw->debugfs_root)) 126 return -1; 127 128 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A); 129 if (i & EDRAM0_ENABLE_F) 130 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); 131 if (i & EDRAM1_ENABLE_F) 132 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); 133 134 hw->chip_ops->chip_dfs_create_ext_mem(hw); 135 return 0; 136 } 137 138 /* 139 * csio_dfs_create - Creates and sets up per-hw debugfs. 140 * 141 */ 142 static int 143 csio_dfs_create(struct csio_hw *hw) 144 { 145 if (csio_debugfs_root) { 146 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), 147 csio_debugfs_root); 148 csio_setup_debugfs(hw); 149 } 150 151 return 0; 152 } 153 154 /* 155 * csio_dfs_destroy - Destroys per-hw debugfs. 156 */ 157 static int 158 csio_dfs_destroy(struct csio_hw *hw) 159 { 160 if (hw->debugfs_root) 161 debugfs_remove_recursive(hw->debugfs_root); 162 163 return 0; 164 } 165 166 /* 167 * csio_dfs_init - Debug filesystem initialization for the module. 168 * 169 */ 170 static int 171 csio_dfs_init(void) 172 { 173 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 174 if (!csio_debugfs_root) 175 pr_warn("Could not create debugfs entry, continuing\n"); 176 177 return 0; 178 } 179 180 /* 181 * csio_dfs_exit - debugfs cleanup for the module. 182 */ 183 static void 184 csio_dfs_exit(void) 185 { 186 debugfs_remove(csio_debugfs_root); 187 } 188 189 /* 190 * csio_pci_init - PCI initialization. 191 * @pdev: PCI device. 192 * @bars: Bitmask of bars to be requested. 193 * 194 * Initializes the PCI function by enabling MMIO, setting bus 195 * mastership and setting DMA mask. 196 */ 197 static int 198 csio_pci_init(struct pci_dev *pdev, int *bars) 199 { 200 int rv = -ENODEV; 201 202 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 203 204 if (pci_enable_device_mem(pdev)) 205 goto err; 206 207 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 208 goto err_disable_device; 209 210 pci_set_master(pdev); 211 pci_try_set_mwi(pdev); 212 213 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 214 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 215 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { 216 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 217 } else { 218 dev_err(&pdev->dev, "No suitable DMA available.\n"); 219 goto err_release_regions; 220 } 221 222 return 0; 223 224 err_release_regions: 225 pci_release_selected_regions(pdev, *bars); 226 err_disable_device: 227 pci_disable_device(pdev); 228 err: 229 return rv; 230 231 } 232 233 /* 234 * csio_pci_exit - PCI unitialization. 235 * @pdev: PCI device. 236 * @bars: Bars to be released. 237 * 238 */ 239 static void 240 csio_pci_exit(struct pci_dev *pdev, int *bars) 241 { 242 pci_release_selected_regions(pdev, *bars); 243 pci_disable_device(pdev); 244 } 245 246 /* 247 * csio_hw_init_workers - Initialize the HW module's worker threads. 248 * @hw: HW module. 249 * 250 */ 251 static void 252 csio_hw_init_workers(struct csio_hw *hw) 253 { 254 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 255 } 256 257 static void 258 csio_hw_exit_workers(struct csio_hw *hw) 259 { 260 cancel_work_sync(&hw->evtq_work); 261 flush_scheduled_work(); 262 } 263 264 static int 265 csio_create_queues(struct csio_hw *hw) 266 { 267 int i, j; 268 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 269 int rv; 270 struct csio_scsi_cpu_info *info; 271 272 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 273 return 0; 274 275 if (hw->intr_mode != CSIO_IM_MSIX) { 276 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 277 0, hw->pport[0].portid, false, NULL); 278 if (rv != 0) { 279 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 280 return rv; 281 } 282 } 283 284 /* FW event queue */ 285 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 286 csio_get_fwevt_intr_idx(hw), 287 hw->pport[0].portid, true, NULL); 288 if (rv != 0) { 289 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 290 return rv; 291 } 292 293 /* Create mgmt queue */ 294 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 295 mgmtm->iq_idx, hw->pport[0].portid, NULL); 296 297 if (rv != 0) { 298 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 299 goto err; 300 } 301 302 /* Create SCSI queues */ 303 for (i = 0; i < hw->num_pports; i++) { 304 info = &hw->scsi_cpu_info[i]; 305 306 for (j = 0; j < info->max_cpus; j++) { 307 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 308 309 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 310 sqset->intr_idx, i, false, NULL); 311 if (rv != 0) { 312 csio_err(hw, 313 "SCSI module IQ config failed [%d][%d]:%d\n", 314 i, j, rv); 315 goto err; 316 } 317 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 318 sqset->iq_idx, i, NULL); 319 if (rv != 0) { 320 csio_err(hw, 321 "SCSI module EQ config failed [%d][%d]:%d\n", 322 i, j, rv); 323 goto err; 324 } 325 } /* for all CPUs */ 326 } /* For all ports */ 327 328 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 329 return 0; 330 err: 331 csio_wr_destroy_queues(hw, true); 332 return -EINVAL; 333 } 334 335 /* 336 * csio_config_queues - Configure the DMA queues. 337 * @hw: HW module. 338 * 339 * Allocates memory for queues are registers them with FW. 340 */ 341 int 342 csio_config_queues(struct csio_hw *hw) 343 { 344 int i, j, idx, k = 0; 345 int rv; 346 struct csio_scsi_qset *sqset; 347 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 348 struct csio_scsi_qset *orig; 349 struct csio_scsi_cpu_info *info; 350 351 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 352 return csio_create_queues(hw); 353 354 /* Calculate number of SCSI queues for MSIX we would like */ 355 hw->num_scsi_msix_cpus = num_online_cpus(); 356 hw->num_sqsets = num_online_cpus() * hw->num_pports; 357 358 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 359 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 360 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 361 } 362 363 /* Initialize max_cpus, may get reduced during msix allocations */ 364 for (i = 0; i < hw->num_pports; i++) 365 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 366 367 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 368 hw->num_sqsets, hw->num_scsi_msix_cpus); 369 370 csio_intr_enable(hw); 371 372 if (hw->intr_mode != CSIO_IM_MSIX) { 373 374 /* Allocate Forward interrupt iq. */ 375 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 376 CSIO_INTR_WRSIZE, CSIO_INGRESS, 377 (void *)hw, 0, 0, NULL); 378 if (hw->intr_iq_idx == -1) { 379 csio_err(hw, 380 "Forward interrupt queue creation failed\n"); 381 goto intr_disable; 382 } 383 } 384 385 /* Allocate the FW evt queue */ 386 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 387 CSIO_FWEVT_WRSIZE, 388 CSIO_INGRESS, (void *)hw, 389 CSIO_FWEVT_FLBUFS, 0, 390 csio_fwevt_intx_handler); 391 if (hw->fwevt_iq_idx == -1) { 392 csio_err(hw, "FW evt queue creation failed\n"); 393 goto intr_disable; 394 } 395 396 /* Allocate the mgmt queue */ 397 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 398 CSIO_MGMT_EQ_WRSIZE, 399 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 400 if (mgmtm->eq_idx == -1) { 401 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 402 goto intr_disable; 403 } 404 405 /* Use FW IQ for MGMT req completion */ 406 mgmtm->iq_idx = hw->fwevt_iq_idx; 407 408 /* Allocate SCSI queues */ 409 for (i = 0; i < hw->num_pports; i++) { 410 info = &hw->scsi_cpu_info[i]; 411 412 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 413 sqset = &hw->sqset[i][j]; 414 415 if (j >= info->max_cpus) { 416 k = j % info->max_cpus; 417 orig = &hw->sqset[i][k]; 418 sqset->eq_idx = orig->eq_idx; 419 sqset->iq_idx = orig->iq_idx; 420 continue; 421 } 422 423 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 424 CSIO_EGRESS, (void *)hw, 0, 0, 425 NULL); 426 if (idx == -1) { 427 csio_err(hw, "EQ creation failed for idx:%d\n", 428 idx); 429 goto intr_disable; 430 } 431 432 sqset->eq_idx = idx; 433 434 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 435 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 436 (void *)hw, 0, 0, 437 csio_scsi_intx_handler); 438 if (idx == -1) { 439 csio_err(hw, "IQ creation failed for idx:%d\n", 440 idx); 441 goto intr_disable; 442 } 443 sqset->iq_idx = idx; 444 } /* for all CPUs */ 445 } /* For all ports */ 446 447 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 448 449 rv = csio_create_queues(hw); 450 if (rv != 0) 451 goto intr_disable; 452 453 /* 454 * Now request IRQs for the vectors. In the event of a failure, 455 * cleanup is handled internally by this function. 456 */ 457 rv = csio_request_irqs(hw); 458 if (rv != 0) 459 return -EINVAL; 460 461 return 0; 462 463 intr_disable: 464 csio_intr_disable(hw, false); 465 466 return -EINVAL; 467 } 468 469 static int 470 csio_resource_alloc(struct csio_hw *hw) 471 { 472 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 473 int rv = -ENOMEM; 474 475 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 476 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 477 478 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 479 sizeof(struct csio_mb)); 480 if (!hw->mb_mempool) 481 goto err; 482 483 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 484 sizeof(struct csio_rnode)); 485 if (!hw->rnode_mempool) 486 goto err_free_mb_mempool; 487 488 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", 489 &hw->pdev->dev, CSIO_SCSI_RSP_LEN, 490 8, 0); 491 if (!hw->scsi_dma_pool) 492 goto err_free_rn_pool; 493 494 return 0; 495 496 err_free_rn_pool: 497 mempool_destroy(hw->rnode_mempool); 498 hw->rnode_mempool = NULL; 499 err_free_mb_mempool: 500 mempool_destroy(hw->mb_mempool); 501 hw->mb_mempool = NULL; 502 err: 503 return rv; 504 } 505 506 static void 507 csio_resource_free(struct csio_hw *hw) 508 { 509 dma_pool_destroy(hw->scsi_dma_pool); 510 hw->scsi_dma_pool = NULL; 511 mempool_destroy(hw->rnode_mempool); 512 hw->rnode_mempool = NULL; 513 mempool_destroy(hw->mb_mempool); 514 hw->mb_mempool = NULL; 515 } 516 517 /* 518 * csio_hw_alloc - Allocate and initialize the HW module. 519 * @pdev: PCI device. 520 * 521 * Allocates HW structure, DMA, memory resources, maps BARS to 522 * host memory and initializes HW module. 523 */ 524 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 525 { 526 struct csio_hw *hw; 527 528 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 529 if (!hw) 530 goto err; 531 532 hw->pdev = pdev; 533 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 534 535 /* memory pool/DMA pool allocation */ 536 if (csio_resource_alloc(hw)) 537 goto err_free_hw; 538 539 /* Get the start address of registers from BAR 0 */ 540 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 541 pci_resource_len(pdev, 0)); 542 if (!hw->regstart) { 543 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 544 hw->regstart); 545 goto err_resource_free; 546 } 547 548 csio_hw_init_workers(hw); 549 550 if (csio_hw_init(hw)) 551 goto err_unmap_bar; 552 553 csio_dfs_create(hw); 554 555 csio_dbg(hw, "hw:%p\n", hw); 556 557 return hw; 558 559 err_unmap_bar: 560 csio_hw_exit_workers(hw); 561 iounmap(hw->regstart); 562 err_resource_free: 563 csio_resource_free(hw); 564 err_free_hw: 565 kfree(hw); 566 err: 567 return NULL; 568 } 569 570 /* 571 * csio_hw_free - Uninitialize and free the HW module. 572 * @hw: The HW module 573 * 574 * Disable interrupts, uninit the HW module, free resources, free hw. 575 */ 576 static void 577 csio_hw_free(struct csio_hw *hw) 578 { 579 csio_intr_disable(hw, true); 580 csio_hw_exit_workers(hw); 581 csio_hw_exit(hw); 582 iounmap(hw->regstart); 583 csio_dfs_destroy(hw); 584 csio_resource_free(hw); 585 kfree(hw); 586 } 587 588 /** 589 * csio_shost_init - Create and initialize the lnode module. 590 * @hw: The HW module. 591 * @dev: The device associated with this invocation. 592 * @probe: Called from probe context or not? 593 * @os_pln: Parent lnode if any. 594 * 595 * Allocates lnode structure via scsi_host_alloc, initializes 596 * shost, initializes lnode module and registers with SCSI ML 597 * via scsi_host_add. This function is shared between physical and 598 * virtual node ports. 599 */ 600 struct csio_lnode * 601 csio_shost_init(struct csio_hw *hw, struct device *dev, 602 bool probe, struct csio_lnode *pln) 603 { 604 struct Scsi_Host *shost = NULL; 605 struct csio_lnode *ln; 606 607 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 608 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 609 610 /* 611 * hw->pdev is the physical port's PCI dev structure, 612 * which will be different from the NPIV dev structure. 613 */ 614 if (dev == &hw->pdev->dev) 615 shost = scsi_host_alloc( 616 &csio_fcoe_shost_template, 617 sizeof(struct csio_lnode)); 618 else 619 shost = scsi_host_alloc( 620 &csio_fcoe_shost_vport_template, 621 sizeof(struct csio_lnode)); 622 623 if (!shost) 624 goto err; 625 626 ln = shost_priv(shost); 627 memset(ln, 0, sizeof(struct csio_lnode)); 628 629 /* Link common lnode to this lnode */ 630 ln->dev_num = (shost->host_no << 16); 631 632 shost->can_queue = CSIO_MAX_QUEUE; 633 shost->this_id = -1; 634 shost->unique_id = shost->host_no; 635 shost->max_cmd_len = 16; /* Max CDB length supported */ 636 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 637 hw->fres_info.max_ssns); 638 shost->max_lun = CSIO_MAX_LUN; 639 if (dev == &hw->pdev->dev) 640 shost->transportt = csio_fcoe_transport; 641 else 642 shost->transportt = csio_fcoe_transport_vport; 643 644 /* root lnode */ 645 if (!hw->rln) 646 hw->rln = ln; 647 648 /* Other initialization here: Common, Transport specific */ 649 if (csio_lnode_init(ln, hw, pln)) 650 goto err_shost_put; 651 652 if (scsi_add_host(shost, dev)) 653 goto err_lnode_exit; 654 655 return ln; 656 657 err_lnode_exit: 658 csio_lnode_exit(ln); 659 err_shost_put: 660 scsi_host_put(shost); 661 err: 662 return NULL; 663 } 664 665 /** 666 * csio_shost_exit - De-instantiate the shost. 667 * @ln: The lnode module corresponding to the shost. 668 * 669 */ 670 void 671 csio_shost_exit(struct csio_lnode *ln) 672 { 673 struct Scsi_Host *shost = csio_ln_to_shost(ln); 674 struct csio_hw *hw = csio_lnode_to_hw(ln); 675 676 /* Inform transport */ 677 fc_remove_host(shost); 678 679 /* Inform SCSI ML */ 680 scsi_remove_host(shost); 681 682 /* Flush all the events, so that any rnode removal events 683 * already queued are all handled, before we remove the lnode. 684 */ 685 spin_lock_irq(&hw->lock); 686 csio_evtq_flush(hw); 687 spin_unlock_irq(&hw->lock); 688 689 csio_lnode_exit(ln); 690 scsi_host_put(shost); 691 } 692 693 struct csio_lnode * 694 csio_lnode_alloc(struct csio_hw *hw) 695 { 696 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 697 } 698 699 void 700 csio_lnodes_block_request(struct csio_hw *hw) 701 { 702 struct Scsi_Host *shost; 703 struct csio_lnode *sln; 704 struct csio_lnode *ln; 705 struct list_head *cur_ln, *cur_cln; 706 struct csio_lnode **lnode_list; 707 int cur_cnt = 0, ii; 708 709 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 710 GFP_KERNEL); 711 if (!lnode_list) { 712 csio_err(hw, "Failed to allocate lnodes_list"); 713 return; 714 } 715 716 spin_lock_irq(&hw->lock); 717 /* Traverse sibling lnodes */ 718 list_for_each(cur_ln, &hw->sln_head) { 719 sln = (struct csio_lnode *) cur_ln; 720 lnode_list[cur_cnt++] = sln; 721 722 /* Traverse children lnodes */ 723 list_for_each(cur_cln, &sln->cln_head) 724 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 725 } 726 spin_unlock_irq(&hw->lock); 727 728 for (ii = 0; ii < cur_cnt; ii++) { 729 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 730 ln = lnode_list[ii]; 731 shost = csio_ln_to_shost(ln); 732 scsi_block_requests(shost); 733 734 } 735 kfree(lnode_list); 736 } 737 738 void 739 csio_lnodes_unblock_request(struct csio_hw *hw) 740 { 741 struct csio_lnode *ln; 742 struct Scsi_Host *shost; 743 struct csio_lnode *sln; 744 struct list_head *cur_ln, *cur_cln; 745 struct csio_lnode **lnode_list; 746 int cur_cnt = 0, ii; 747 748 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 749 GFP_KERNEL); 750 if (!lnode_list) { 751 csio_err(hw, "Failed to allocate lnodes_list"); 752 return; 753 } 754 755 spin_lock_irq(&hw->lock); 756 /* Traverse sibling lnodes */ 757 list_for_each(cur_ln, &hw->sln_head) { 758 sln = (struct csio_lnode *) cur_ln; 759 lnode_list[cur_cnt++] = sln; 760 761 /* Traverse children lnodes */ 762 list_for_each(cur_cln, &sln->cln_head) 763 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 764 } 765 spin_unlock_irq(&hw->lock); 766 767 for (ii = 0; ii < cur_cnt; ii++) { 768 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 769 ln = lnode_list[ii]; 770 shost = csio_ln_to_shost(ln); 771 scsi_unblock_requests(shost); 772 } 773 kfree(lnode_list); 774 } 775 776 void 777 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 778 { 779 struct csio_lnode *ln; 780 struct Scsi_Host *shost; 781 struct csio_lnode *sln; 782 struct list_head *cur_ln, *cur_cln; 783 struct csio_lnode **lnode_list; 784 int cur_cnt = 0, ii; 785 786 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 787 GFP_KERNEL); 788 if (!lnode_list) { 789 csio_err(hw, "Failed to allocate lnodes_list"); 790 return; 791 } 792 793 spin_lock_irq(&hw->lock); 794 /* Traverse sibling lnodes */ 795 list_for_each(cur_ln, &hw->sln_head) { 796 sln = (struct csio_lnode *) cur_ln; 797 if (sln->portid != portid) 798 continue; 799 800 lnode_list[cur_cnt++] = sln; 801 802 /* Traverse children lnodes */ 803 list_for_each(cur_cln, &sln->cln_head) 804 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 805 } 806 spin_unlock_irq(&hw->lock); 807 808 for (ii = 0; ii < cur_cnt; ii++) { 809 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 810 ln = lnode_list[ii]; 811 shost = csio_ln_to_shost(ln); 812 scsi_block_requests(shost); 813 } 814 kfree(lnode_list); 815 } 816 817 void 818 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 819 { 820 struct csio_lnode *ln; 821 struct Scsi_Host *shost; 822 struct csio_lnode *sln; 823 struct list_head *cur_ln, *cur_cln; 824 struct csio_lnode **lnode_list; 825 int cur_cnt = 0, ii; 826 827 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 828 GFP_KERNEL); 829 if (!lnode_list) { 830 csio_err(hw, "Failed to allocate lnodes_list"); 831 return; 832 } 833 834 spin_lock_irq(&hw->lock); 835 /* Traverse sibling lnodes */ 836 list_for_each(cur_ln, &hw->sln_head) { 837 sln = (struct csio_lnode *) cur_ln; 838 if (sln->portid != portid) 839 continue; 840 lnode_list[cur_cnt++] = sln; 841 842 /* Traverse children lnodes */ 843 list_for_each(cur_cln, &sln->cln_head) 844 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 845 } 846 spin_unlock_irq(&hw->lock); 847 848 for (ii = 0; ii < cur_cnt; ii++) { 849 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 850 ln = lnode_list[ii]; 851 shost = csio_ln_to_shost(ln); 852 scsi_unblock_requests(shost); 853 } 854 kfree(lnode_list); 855 } 856 857 void 858 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 859 { 860 struct csio_lnode *sln; 861 struct csio_lnode *ln; 862 struct list_head *cur_ln, *cur_cln; 863 struct csio_lnode **lnode_list; 864 int cur_cnt = 0, ii; 865 866 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 867 GFP_KERNEL); 868 if (!lnode_list) { 869 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 870 return; 871 } 872 873 /* Get all child lnodes(NPIV ports) */ 874 spin_lock_irq(&hw->lock); 875 list_for_each(cur_ln, &hw->sln_head) { 876 sln = (struct csio_lnode *) cur_ln; 877 878 /* Traverse children lnodes */ 879 list_for_each(cur_cln, &sln->cln_head) 880 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 881 } 882 spin_unlock_irq(&hw->lock); 883 884 /* Delete NPIV lnodes */ 885 for (ii = 0; ii < cur_cnt; ii++) { 886 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 887 ln = lnode_list[ii]; 888 fc_vport_terminate(ln->fc_vport); 889 } 890 891 /* Delete only npiv lnodes */ 892 if (npiv) 893 goto free_lnodes; 894 895 cur_cnt = 0; 896 /* Get all physical lnodes */ 897 spin_lock_irq(&hw->lock); 898 /* Traverse sibling lnodes */ 899 list_for_each(cur_ln, &hw->sln_head) { 900 sln = (struct csio_lnode *) cur_ln; 901 lnode_list[cur_cnt++] = sln; 902 } 903 spin_unlock_irq(&hw->lock); 904 905 /* Delete physical lnodes */ 906 for (ii = 0; ii < cur_cnt; ii++) { 907 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 908 csio_shost_exit(lnode_list[ii]); 909 } 910 911 free_lnodes: 912 kfree(lnode_list); 913 } 914 915 /* 916 * csio_lnode_init_post: Set lnode attributes after starting HW. 917 * @ln: lnode. 918 * 919 */ 920 static void 921 csio_lnode_init_post(struct csio_lnode *ln) 922 { 923 struct Scsi_Host *shost = csio_ln_to_shost(ln); 924 925 csio_fchost_attr_init(ln); 926 927 scsi_scan_host(shost); 928 } 929 930 /* 931 * csio_probe_one - Instantiate this function. 932 * @pdev: PCI device 933 * @id: Device ID 934 * 935 * This is the .probe() callback of the driver. This function: 936 * - Initializes the PCI function by enabling MMIO, setting bus 937 * mastership and setting DMA mask. 938 * - Allocates HW structure, DMA, memory resources, maps BARS to 939 * host memory and initializes HW module. 940 * - Allocates lnode structure via scsi_host_alloc, initializes 941 * shost, initialized lnode module and registers with SCSI ML 942 * via scsi_host_add. 943 * - Enables interrupts, and starts the chip by kicking off the 944 * HW state machine. 945 * - Once hardware is ready, initiated scan of the host via 946 * scsi_scan_host. 947 */ 948 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 949 { 950 int rv; 951 int bars; 952 int i; 953 struct csio_hw *hw; 954 struct csio_lnode *ln; 955 956 /* probe only T5 and T6 cards */ 957 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && 958 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) 959 return -ENODEV; 960 961 rv = csio_pci_init(pdev, &bars); 962 if (rv) 963 goto err; 964 965 hw = csio_hw_alloc(pdev); 966 if (!hw) { 967 rv = -ENODEV; 968 goto err_pci_exit; 969 } 970 971 if (!pcie_relaxed_ordering_enabled(pdev)) 972 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; 973 974 pci_set_drvdata(pdev, hw); 975 976 rv = csio_hw_start(hw); 977 if (rv) { 978 if (rv == -EINVAL) { 979 dev_err(&pdev->dev, 980 "Failed to start FW, continuing in debug mode.\n"); 981 return 0; 982 } 983 goto err_lnode_exit; 984 } 985 986 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 987 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 988 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 989 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 990 FW_HDR_FW_VER_BUILD_G(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 csio_lnodes_exit(hw, 0); 1024 csio_hw_free(hw); 1025 err_pci_exit: 1026 csio_pci_exit(pdev, &bars); 1027 err: 1028 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1029 return rv; 1030 } 1031 1032 /* 1033 * csio_remove_one - Remove one instance of the driver at this PCI function. 1034 * @pdev: PCI device 1035 * 1036 * Used during hotplug operation. 1037 */ 1038 static void csio_remove_one(struct pci_dev *pdev) 1039 { 1040 struct csio_hw *hw = pci_get_drvdata(pdev); 1041 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1042 1043 csio_lnodes_block_request(hw); 1044 spin_lock_irq(&hw->lock); 1045 1046 /* Stops lnode, Rnode s/m 1047 * Quiesce IOs. 1048 * All sessions with remote ports are unregistered. 1049 */ 1050 csio_hw_stop(hw); 1051 spin_unlock_irq(&hw->lock); 1052 csio_lnodes_unblock_request(hw); 1053 1054 csio_lnodes_exit(hw, 0); 1055 csio_hw_free(hw); 1056 csio_pci_exit(pdev, &bars); 1057 } 1058 1059 /* 1060 * csio_pci_error_detected - PCI error was detected 1061 * @pdev: PCI device 1062 * 1063 */ 1064 static pci_ers_result_t 1065 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1066 { 1067 struct csio_hw *hw = pci_get_drvdata(pdev); 1068 1069 csio_lnodes_block_request(hw); 1070 spin_lock_irq(&hw->lock); 1071 1072 /* Post PCI error detected evt to HW s/m 1073 * HW s/m handles this evt by quiescing IOs, unregisters rports 1074 * and finally takes the device to offline. 1075 */ 1076 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1077 spin_unlock_irq(&hw->lock); 1078 csio_lnodes_unblock_request(hw); 1079 csio_lnodes_exit(hw, 0); 1080 csio_intr_disable(hw, true); 1081 pci_disable_device(pdev); 1082 return state == pci_channel_io_perm_failure ? 1083 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1084 } 1085 1086 /* 1087 * csio_pci_slot_reset - PCI slot has been reset. 1088 * @pdev: PCI device 1089 * 1090 */ 1091 static pci_ers_result_t 1092 csio_pci_slot_reset(struct pci_dev *pdev) 1093 { 1094 struct csio_hw *hw = pci_get_drvdata(pdev); 1095 int ready; 1096 1097 if (pci_enable_device(pdev)) { 1098 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1099 return PCI_ERS_RESULT_DISCONNECT; 1100 } 1101 1102 pci_set_master(pdev); 1103 pci_restore_state(pdev); 1104 pci_save_state(pdev); 1105 pci_cleanup_aer_uncorrect_error_status(pdev); 1106 1107 /* Bring HW s/m to ready state. 1108 * but don't resume IOs. 1109 */ 1110 spin_lock_irq(&hw->lock); 1111 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1112 ready = csio_is_hw_ready(hw); 1113 spin_unlock_irq(&hw->lock); 1114 1115 if (ready) { 1116 return PCI_ERS_RESULT_RECOVERED; 1117 } else { 1118 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1119 return PCI_ERS_RESULT_DISCONNECT; 1120 } 1121 } 1122 1123 /* 1124 * csio_pci_resume - Resume normal operations 1125 * @pdev: PCI device 1126 * 1127 */ 1128 static void 1129 csio_pci_resume(struct pci_dev *pdev) 1130 { 1131 struct csio_hw *hw = pci_get_drvdata(pdev); 1132 struct csio_lnode *ln; 1133 int rv = 0; 1134 int i; 1135 1136 /* Bring the LINK UP and Resume IO */ 1137 1138 for (i = 0; i < hw->num_pports; i++) { 1139 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1140 if (!ln) { 1141 rv = -ENODEV; 1142 break; 1143 } 1144 /* Initialize portid */ 1145 ln->portid = hw->pport[i].portid; 1146 1147 spin_lock_irq(&hw->lock); 1148 if (csio_lnode_start(ln) != 0) 1149 rv = -ENODEV; 1150 spin_unlock_irq(&hw->lock); 1151 1152 if (rv) 1153 break; 1154 1155 csio_lnode_init_post(ln); 1156 } 1157 1158 if (rv) 1159 goto err_resume_exit; 1160 1161 return; 1162 1163 err_resume_exit: 1164 csio_lnodes_block_request(hw); 1165 spin_lock_irq(&hw->lock); 1166 csio_hw_stop(hw); 1167 spin_unlock_irq(&hw->lock); 1168 csio_lnodes_unblock_request(hw); 1169 csio_lnodes_exit(hw, 0); 1170 csio_hw_free(hw); 1171 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1172 } 1173 1174 static struct pci_error_handlers csio_err_handler = { 1175 .error_detected = csio_pci_error_detected, 1176 .slot_reset = csio_pci_slot_reset, 1177 .resume = csio_pci_resume, 1178 }; 1179 1180 /* 1181 * Macros needed to support the PCI Device ID Table ... 1182 */ 1183 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ 1184 static const struct pci_device_id csio_pci_tbl[] = { 1185 /* Define for FCoE uses PF6 */ 1186 #define CH_PCI_DEVICE_ID_FUNCTION 0x6 1187 1188 #define CH_PCI_ID_TABLE_ENTRY(devid) \ 1189 { PCI_VDEVICE(CHELSIO, (devid)), 0 } 1190 1191 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } 1192 1193 #include "t4_pci_id_tbl.h" 1194 1195 static struct pci_driver csio_pci_driver = { 1196 .name = KBUILD_MODNAME, 1197 .driver = { 1198 .owner = THIS_MODULE, 1199 }, 1200 .id_table = csio_pci_tbl, 1201 .probe = csio_probe_one, 1202 .remove = csio_remove_one, 1203 .err_handler = &csio_err_handler, 1204 }; 1205 1206 /* 1207 * csio_init - Chelsio storage driver initialization function. 1208 * 1209 */ 1210 static int __init 1211 csio_init(void) 1212 { 1213 int rv = -ENOMEM; 1214 1215 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1216 1217 csio_dfs_init(); 1218 1219 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1220 if (!csio_fcoe_transport) 1221 goto err; 1222 1223 csio_fcoe_transport_vport = 1224 fc_attach_transport(&csio_fc_transport_vport_funcs); 1225 if (!csio_fcoe_transport_vport) 1226 goto err_vport; 1227 1228 rv = pci_register_driver(&csio_pci_driver); 1229 if (rv) 1230 goto err_pci; 1231 1232 return 0; 1233 1234 err_pci: 1235 fc_release_transport(csio_fcoe_transport_vport); 1236 err_vport: 1237 fc_release_transport(csio_fcoe_transport); 1238 err: 1239 csio_dfs_exit(); 1240 return rv; 1241 } 1242 1243 /* 1244 * csio_exit - Chelsio storage driver uninitialization . 1245 * 1246 * Function that gets called in the unload path. 1247 */ 1248 static void __exit 1249 csio_exit(void) 1250 { 1251 pci_unregister_driver(&csio_pci_driver); 1252 csio_dfs_exit(); 1253 fc_release_transport(csio_fcoe_transport_vport); 1254 fc_release_transport(csio_fcoe_transport); 1255 } 1256 1257 module_init(csio_init); 1258 module_exit(csio_exit); 1259 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1260 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1261 MODULE_LICENSE(CSIO_DRV_LICENSE); 1262 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1263 MODULE_VERSION(CSIO_DRV_VERSION); 1264 MODULE_FIRMWARE(FW_FNAME_T5); 1265 MODULE_FIRMWARE(FW_FNAME_T6); 1266