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 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 214 if (rv) 215 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 216 if (rv) { 217 rv = -ENODEV; 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 } 262 263 static int 264 csio_create_queues(struct csio_hw *hw) 265 { 266 int i, j; 267 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 268 int rv; 269 struct csio_scsi_cpu_info *info; 270 271 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 272 return 0; 273 274 if (hw->intr_mode != CSIO_IM_MSIX) { 275 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 276 0, hw->pport[0].portid, false, NULL); 277 if (rv != 0) { 278 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 279 return rv; 280 } 281 } 282 283 /* FW event queue */ 284 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 285 csio_get_fwevt_intr_idx(hw), 286 hw->pport[0].portid, true, NULL); 287 if (rv != 0) { 288 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 289 return rv; 290 } 291 292 /* Create mgmt queue */ 293 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 294 mgmtm->iq_idx, hw->pport[0].portid, NULL); 295 296 if (rv != 0) { 297 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 298 goto err; 299 } 300 301 /* Create SCSI queues */ 302 for (i = 0; i < hw->num_pports; i++) { 303 info = &hw->scsi_cpu_info[i]; 304 305 for (j = 0; j < info->max_cpus; j++) { 306 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 307 308 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 309 sqset->intr_idx, i, false, NULL); 310 if (rv != 0) { 311 csio_err(hw, 312 "SCSI module IQ config failed [%d][%d]:%d\n", 313 i, j, rv); 314 goto err; 315 } 316 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 317 sqset->iq_idx, i, NULL); 318 if (rv != 0) { 319 csio_err(hw, 320 "SCSI module EQ config failed [%d][%d]:%d\n", 321 i, j, rv); 322 goto err; 323 } 324 } /* for all CPUs */ 325 } /* For all ports */ 326 327 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 328 return 0; 329 err: 330 csio_wr_destroy_queues(hw, true); 331 return -EINVAL; 332 } 333 334 /* 335 * csio_config_queues - Configure the DMA queues. 336 * @hw: HW module. 337 * 338 * Allocates memory for queues are registers them with FW. 339 */ 340 int 341 csio_config_queues(struct csio_hw *hw) 342 { 343 int i, j, idx, k = 0; 344 int rv; 345 struct csio_scsi_qset *sqset; 346 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 347 struct csio_scsi_qset *orig; 348 struct csio_scsi_cpu_info *info; 349 350 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 351 return csio_create_queues(hw); 352 353 /* Calculate number of SCSI queues for MSIX we would like */ 354 hw->num_scsi_msix_cpus = num_online_cpus(); 355 hw->num_sqsets = num_online_cpus() * hw->num_pports; 356 357 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 358 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 359 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 360 } 361 362 /* Initialize max_cpus, may get reduced during msix allocations */ 363 for (i = 0; i < hw->num_pports; i++) 364 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 365 366 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 367 hw->num_sqsets, hw->num_scsi_msix_cpus); 368 369 csio_intr_enable(hw); 370 371 if (hw->intr_mode != CSIO_IM_MSIX) { 372 373 /* Allocate Forward interrupt iq. */ 374 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 375 CSIO_INTR_WRSIZE, CSIO_INGRESS, 376 (void *)hw, 0, 0, NULL); 377 if (hw->intr_iq_idx == -1) { 378 csio_err(hw, 379 "Forward interrupt queue creation failed\n"); 380 goto intr_disable; 381 } 382 } 383 384 /* Allocate the FW evt queue */ 385 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 386 CSIO_FWEVT_WRSIZE, 387 CSIO_INGRESS, (void *)hw, 388 CSIO_FWEVT_FLBUFS, 0, 389 csio_fwevt_intx_handler); 390 if (hw->fwevt_iq_idx == -1) { 391 csio_err(hw, "FW evt queue creation failed\n"); 392 goto intr_disable; 393 } 394 395 /* Allocate the mgmt queue */ 396 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 397 CSIO_MGMT_EQ_WRSIZE, 398 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 399 if (mgmtm->eq_idx == -1) { 400 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 401 goto intr_disable; 402 } 403 404 /* Use FW IQ for MGMT req completion */ 405 mgmtm->iq_idx = hw->fwevt_iq_idx; 406 407 /* Allocate SCSI queues */ 408 for (i = 0; i < hw->num_pports; i++) { 409 info = &hw->scsi_cpu_info[i]; 410 411 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 412 sqset = &hw->sqset[i][j]; 413 414 if (j >= info->max_cpus) { 415 k = j % info->max_cpus; 416 orig = &hw->sqset[i][k]; 417 sqset->eq_idx = orig->eq_idx; 418 sqset->iq_idx = orig->iq_idx; 419 continue; 420 } 421 422 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 423 CSIO_EGRESS, (void *)hw, 0, 0, 424 NULL); 425 if (idx == -1) { 426 csio_err(hw, "EQ creation failed for idx:%d\n", 427 idx); 428 goto intr_disable; 429 } 430 431 sqset->eq_idx = idx; 432 433 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 434 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 435 (void *)hw, 0, 0, 436 csio_scsi_intx_handler); 437 if (idx == -1) { 438 csio_err(hw, "IQ creation failed for idx:%d\n", 439 idx); 440 goto intr_disable; 441 } 442 sqset->iq_idx = idx; 443 } /* for all CPUs */ 444 } /* For all ports */ 445 446 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 447 448 rv = csio_create_queues(hw); 449 if (rv != 0) 450 goto intr_disable; 451 452 /* 453 * Now request IRQs for the vectors. In the event of a failure, 454 * cleanup is handled internally by this function. 455 */ 456 rv = csio_request_irqs(hw); 457 if (rv != 0) 458 return -EINVAL; 459 460 return 0; 461 462 intr_disable: 463 csio_intr_disable(hw, false); 464 465 return -EINVAL; 466 } 467 468 static int 469 csio_resource_alloc(struct csio_hw *hw) 470 { 471 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 472 int rv = -ENOMEM; 473 474 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 475 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 476 477 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 478 sizeof(struct csio_mb)); 479 if (!hw->mb_mempool) 480 goto err; 481 482 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 483 sizeof(struct csio_rnode)); 484 if (!hw->rnode_mempool) 485 goto err_free_mb_mempool; 486 487 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", 488 &hw->pdev->dev, CSIO_SCSI_RSP_LEN, 489 8, 0); 490 if (!hw->scsi_dma_pool) 491 goto err_free_rn_pool; 492 493 return 0; 494 495 err_free_rn_pool: 496 mempool_destroy(hw->rnode_mempool); 497 hw->rnode_mempool = NULL; 498 err_free_mb_mempool: 499 mempool_destroy(hw->mb_mempool); 500 hw->mb_mempool = NULL; 501 err: 502 return rv; 503 } 504 505 static void 506 csio_resource_free(struct csio_hw *hw) 507 { 508 dma_pool_destroy(hw->scsi_dma_pool); 509 hw->scsi_dma_pool = NULL; 510 mempool_destroy(hw->rnode_mempool); 511 hw->rnode_mempool = NULL; 512 mempool_destroy(hw->mb_mempool); 513 hw->mb_mempool = NULL; 514 } 515 516 /* 517 * csio_hw_alloc - Allocate and initialize the HW module. 518 * @pdev: PCI device. 519 * 520 * Allocates HW structure, DMA, memory resources, maps BARS to 521 * host memory and initializes HW module. 522 */ 523 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 524 { 525 struct csio_hw *hw; 526 527 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 528 if (!hw) 529 goto err; 530 531 hw->pdev = pdev; 532 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 533 534 /* memory pool/DMA pool allocation */ 535 if (csio_resource_alloc(hw)) 536 goto err_free_hw; 537 538 /* Get the start address of registers from BAR 0 */ 539 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 540 pci_resource_len(pdev, 0)); 541 if (!hw->regstart) { 542 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 543 hw->regstart); 544 goto err_resource_free; 545 } 546 547 csio_hw_init_workers(hw); 548 549 if (csio_hw_init(hw)) 550 goto err_unmap_bar; 551 552 csio_dfs_create(hw); 553 554 csio_dbg(hw, "hw:%p\n", hw); 555 556 return hw; 557 558 err_unmap_bar: 559 csio_hw_exit_workers(hw); 560 iounmap(hw->regstart); 561 err_resource_free: 562 csio_resource_free(hw); 563 err_free_hw: 564 kfree(hw); 565 err: 566 return NULL; 567 } 568 569 /* 570 * csio_hw_free - Uninitialize and free the HW module. 571 * @hw: The HW module 572 * 573 * Disable interrupts, uninit the HW module, free resources, free hw. 574 */ 575 static void 576 csio_hw_free(struct csio_hw *hw) 577 { 578 csio_intr_disable(hw, true); 579 csio_hw_exit_workers(hw); 580 csio_hw_exit(hw); 581 iounmap(hw->regstart); 582 csio_dfs_destroy(hw); 583 csio_resource_free(hw); 584 kfree(hw); 585 } 586 587 /** 588 * csio_shost_init - Create and initialize the lnode module. 589 * @hw: The HW module. 590 * @dev: The device associated with this invocation. 591 * @probe: Called from probe context or not? 592 * @os_pln: Parent lnode if any. 593 * 594 * Allocates lnode structure via scsi_host_alloc, initializes 595 * shost, initializes lnode module and registers with SCSI ML 596 * via scsi_host_add. This function is shared between physical and 597 * virtual node ports. 598 */ 599 struct csio_lnode * 600 csio_shost_init(struct csio_hw *hw, struct device *dev, 601 bool probe, struct csio_lnode *pln) 602 { 603 struct Scsi_Host *shost = NULL; 604 struct csio_lnode *ln; 605 606 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 607 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 608 609 /* 610 * hw->pdev is the physical port's PCI dev structure, 611 * which will be different from the NPIV dev structure. 612 */ 613 if (dev == &hw->pdev->dev) 614 shost = scsi_host_alloc( 615 &csio_fcoe_shost_template, 616 sizeof(struct csio_lnode)); 617 else 618 shost = scsi_host_alloc( 619 &csio_fcoe_shost_vport_template, 620 sizeof(struct csio_lnode)); 621 622 if (!shost) 623 goto err; 624 625 ln = shost_priv(shost); 626 memset(ln, 0, sizeof(struct csio_lnode)); 627 628 /* Link common lnode to this lnode */ 629 ln->dev_num = (shost->host_no << 16); 630 631 shost->can_queue = CSIO_MAX_QUEUE; 632 shost->this_id = -1; 633 shost->unique_id = shost->host_no; 634 shost->max_cmd_len = 16; /* Max CDB length supported */ 635 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 636 hw->fres_info.max_ssns); 637 shost->max_lun = CSIO_MAX_LUN; 638 if (dev == &hw->pdev->dev) 639 shost->transportt = csio_fcoe_transport; 640 else 641 shost->transportt = csio_fcoe_transport_vport; 642 643 /* root lnode */ 644 if (!hw->rln) 645 hw->rln = ln; 646 647 /* Other initialization here: Common, Transport specific */ 648 if (csio_lnode_init(ln, hw, pln)) 649 goto err_shost_put; 650 651 if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev)) 652 goto err_lnode_exit; 653 654 return ln; 655 656 err_lnode_exit: 657 csio_lnode_exit(ln); 658 err_shost_put: 659 scsi_host_put(shost); 660 err: 661 return NULL; 662 } 663 664 /** 665 * csio_shost_exit - De-instantiate the shost. 666 * @ln: The lnode module corresponding to the shost. 667 * 668 */ 669 void 670 csio_shost_exit(struct csio_lnode *ln) 671 { 672 struct Scsi_Host *shost = csio_ln_to_shost(ln); 673 struct csio_hw *hw = csio_lnode_to_hw(ln); 674 675 /* Inform transport */ 676 fc_remove_host(shost); 677 678 /* Inform SCSI ML */ 679 scsi_remove_host(shost); 680 681 /* Flush all the events, so that any rnode removal events 682 * already queued are all handled, before we remove the lnode. 683 */ 684 spin_lock_irq(&hw->lock); 685 csio_evtq_flush(hw); 686 spin_unlock_irq(&hw->lock); 687 688 csio_lnode_exit(ln); 689 scsi_host_put(shost); 690 } 691 692 struct csio_lnode * 693 csio_lnode_alloc(struct csio_hw *hw) 694 { 695 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 696 } 697 698 void 699 csio_lnodes_block_request(struct csio_hw *hw) 700 { 701 struct Scsi_Host *shost; 702 struct csio_lnode *sln; 703 struct csio_lnode *ln; 704 struct list_head *cur_ln, *cur_cln; 705 struct csio_lnode **lnode_list; 706 int cur_cnt = 0, ii; 707 708 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 709 GFP_KERNEL); 710 if (!lnode_list) { 711 csio_err(hw, "Failed to allocate lnodes_list"); 712 return; 713 } 714 715 spin_lock_irq(&hw->lock); 716 /* Traverse sibling lnodes */ 717 list_for_each(cur_ln, &hw->sln_head) { 718 sln = (struct csio_lnode *) cur_ln; 719 lnode_list[cur_cnt++] = sln; 720 721 /* Traverse children lnodes */ 722 list_for_each(cur_cln, &sln->cln_head) 723 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 724 } 725 spin_unlock_irq(&hw->lock); 726 727 for (ii = 0; ii < cur_cnt; ii++) { 728 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 729 ln = lnode_list[ii]; 730 shost = csio_ln_to_shost(ln); 731 scsi_block_requests(shost); 732 733 } 734 kfree(lnode_list); 735 } 736 737 void 738 csio_lnodes_unblock_request(struct csio_hw *hw) 739 { 740 struct csio_lnode *ln; 741 struct Scsi_Host *shost; 742 struct csio_lnode *sln; 743 struct list_head *cur_ln, *cur_cln; 744 struct csio_lnode **lnode_list; 745 int cur_cnt = 0, ii; 746 747 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 748 GFP_KERNEL); 749 if (!lnode_list) { 750 csio_err(hw, "Failed to allocate lnodes_list"); 751 return; 752 } 753 754 spin_lock_irq(&hw->lock); 755 /* Traverse sibling lnodes */ 756 list_for_each(cur_ln, &hw->sln_head) { 757 sln = (struct csio_lnode *) cur_ln; 758 lnode_list[cur_cnt++] = sln; 759 760 /* Traverse children lnodes */ 761 list_for_each(cur_cln, &sln->cln_head) 762 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 763 } 764 spin_unlock_irq(&hw->lock); 765 766 for (ii = 0; ii < cur_cnt; ii++) { 767 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 768 ln = lnode_list[ii]; 769 shost = csio_ln_to_shost(ln); 770 scsi_unblock_requests(shost); 771 } 772 kfree(lnode_list); 773 } 774 775 void 776 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 777 { 778 struct csio_lnode *ln; 779 struct Scsi_Host *shost; 780 struct csio_lnode *sln; 781 struct list_head *cur_ln, *cur_cln; 782 struct csio_lnode **lnode_list; 783 int cur_cnt = 0, ii; 784 785 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 786 GFP_KERNEL); 787 if (!lnode_list) { 788 csio_err(hw, "Failed to allocate lnodes_list"); 789 return; 790 } 791 792 spin_lock_irq(&hw->lock); 793 /* Traverse sibling lnodes */ 794 list_for_each(cur_ln, &hw->sln_head) { 795 sln = (struct csio_lnode *) cur_ln; 796 if (sln->portid != portid) 797 continue; 798 799 lnode_list[cur_cnt++] = sln; 800 801 /* Traverse children lnodes */ 802 list_for_each(cur_cln, &sln->cln_head) 803 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 804 } 805 spin_unlock_irq(&hw->lock); 806 807 for (ii = 0; ii < cur_cnt; ii++) { 808 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 809 ln = lnode_list[ii]; 810 shost = csio_ln_to_shost(ln); 811 scsi_block_requests(shost); 812 } 813 kfree(lnode_list); 814 } 815 816 void 817 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 818 { 819 struct csio_lnode *ln; 820 struct Scsi_Host *shost; 821 struct csio_lnode *sln; 822 struct list_head *cur_ln, *cur_cln; 823 struct csio_lnode **lnode_list; 824 int cur_cnt = 0, ii; 825 826 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 827 GFP_KERNEL); 828 if (!lnode_list) { 829 csio_err(hw, "Failed to allocate lnodes_list"); 830 return; 831 } 832 833 spin_lock_irq(&hw->lock); 834 /* Traverse sibling lnodes */ 835 list_for_each(cur_ln, &hw->sln_head) { 836 sln = (struct csio_lnode *) cur_ln; 837 if (sln->portid != portid) 838 continue; 839 lnode_list[cur_cnt++] = sln; 840 841 /* Traverse children lnodes */ 842 list_for_each(cur_cln, &sln->cln_head) 843 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 844 } 845 spin_unlock_irq(&hw->lock); 846 847 for (ii = 0; ii < cur_cnt; ii++) { 848 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 849 ln = lnode_list[ii]; 850 shost = csio_ln_to_shost(ln); 851 scsi_unblock_requests(shost); 852 } 853 kfree(lnode_list); 854 } 855 856 void 857 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 858 { 859 struct csio_lnode *sln; 860 struct csio_lnode *ln; 861 struct list_head *cur_ln, *cur_cln; 862 struct csio_lnode **lnode_list; 863 int cur_cnt = 0, ii; 864 865 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 866 GFP_KERNEL); 867 if (!lnode_list) { 868 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 869 return; 870 } 871 872 /* Get all child lnodes(NPIV ports) */ 873 spin_lock_irq(&hw->lock); 874 list_for_each(cur_ln, &hw->sln_head) { 875 sln = (struct csio_lnode *) cur_ln; 876 877 /* Traverse children lnodes */ 878 list_for_each(cur_cln, &sln->cln_head) 879 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 880 } 881 spin_unlock_irq(&hw->lock); 882 883 /* Delete NPIV lnodes */ 884 for (ii = 0; ii < cur_cnt; ii++) { 885 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 886 ln = lnode_list[ii]; 887 fc_vport_terminate(ln->fc_vport); 888 } 889 890 /* Delete only npiv lnodes */ 891 if (npiv) 892 goto free_lnodes; 893 894 cur_cnt = 0; 895 /* Get all physical lnodes */ 896 spin_lock_irq(&hw->lock); 897 /* Traverse sibling lnodes */ 898 list_for_each(cur_ln, &hw->sln_head) { 899 sln = (struct csio_lnode *) cur_ln; 900 lnode_list[cur_cnt++] = sln; 901 } 902 spin_unlock_irq(&hw->lock); 903 904 /* Delete physical lnodes */ 905 for (ii = 0; ii < cur_cnt; ii++) { 906 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 907 csio_shost_exit(lnode_list[ii]); 908 } 909 910 free_lnodes: 911 kfree(lnode_list); 912 } 913 914 /* 915 * csio_lnode_init_post: Set lnode attributes after starting HW. 916 * @ln: lnode. 917 * 918 */ 919 static void 920 csio_lnode_init_post(struct csio_lnode *ln) 921 { 922 struct Scsi_Host *shost = csio_ln_to_shost(ln); 923 924 csio_fchost_attr_init(ln); 925 926 scsi_scan_host(shost); 927 } 928 929 /* 930 * csio_probe_one - Instantiate this function. 931 * @pdev: PCI device 932 * @id: Device ID 933 * 934 * This is the .probe() callback of the driver. This function: 935 * - Initializes the PCI function by enabling MMIO, setting bus 936 * mastership and setting DMA mask. 937 * - Allocates HW structure, DMA, memory resources, maps BARS to 938 * host memory and initializes HW module. 939 * - Allocates lnode structure via scsi_host_alloc, initializes 940 * shost, initialized lnode module and registers with SCSI ML 941 * via scsi_host_add. 942 * - Enables interrupts, and starts the chip by kicking off the 943 * HW state machine. 944 * - Once hardware is ready, initiated scan of the host via 945 * scsi_scan_host. 946 */ 947 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 948 { 949 int rv; 950 int bars; 951 int i; 952 struct csio_hw *hw; 953 struct csio_lnode *ln; 954 955 /* probe only T5 and T6 cards */ 956 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && 957 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) 958 return -ENODEV; 959 960 rv = csio_pci_init(pdev, &bars); 961 if (rv) 962 goto err; 963 964 hw = csio_hw_alloc(pdev); 965 if (!hw) { 966 rv = -ENODEV; 967 goto err_pci_exit; 968 } 969 970 if (!pcie_relaxed_ordering_enabled(pdev)) 971 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; 972 973 pci_set_drvdata(pdev, hw); 974 975 rv = csio_hw_start(hw); 976 if (rv) { 977 if (rv == -EINVAL) { 978 dev_err(&pdev->dev, 979 "Failed to start FW, continuing in debug mode.\n"); 980 return 0; 981 } 982 goto err_lnode_exit; 983 } 984 985 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 986 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 987 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 988 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 989 FW_HDR_FW_VER_BUILD_G(hw->fwrev)); 990 991 for (i = 0; i < hw->num_pports; i++) { 992 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 993 if (!ln) { 994 rv = -ENODEV; 995 break; 996 } 997 /* Initialize portid */ 998 ln->portid = hw->pport[i].portid; 999 1000 spin_lock_irq(&hw->lock); 1001 if (csio_lnode_start(ln) != 0) 1002 rv = -ENODEV; 1003 spin_unlock_irq(&hw->lock); 1004 1005 if (rv) 1006 break; 1007 1008 csio_lnode_init_post(ln); 1009 } 1010 1011 if (rv) 1012 goto err_lnode_exit; 1013 1014 return 0; 1015 1016 err_lnode_exit: 1017 csio_lnodes_block_request(hw); 1018 spin_lock_irq(&hw->lock); 1019 csio_hw_stop(hw); 1020 spin_unlock_irq(&hw->lock); 1021 csio_lnodes_unblock_request(hw); 1022 csio_lnodes_exit(hw, 0); 1023 csio_hw_free(hw); 1024 err_pci_exit: 1025 csio_pci_exit(pdev, &bars); 1026 err: 1027 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1028 return rv; 1029 } 1030 1031 /* 1032 * csio_remove_one - Remove one instance of the driver at this PCI function. 1033 * @pdev: PCI device 1034 * 1035 * Used during hotplug operation. 1036 */ 1037 static void csio_remove_one(struct pci_dev *pdev) 1038 { 1039 struct csio_hw *hw = pci_get_drvdata(pdev); 1040 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1041 1042 csio_lnodes_block_request(hw); 1043 spin_lock_irq(&hw->lock); 1044 1045 /* Stops lnode, Rnode s/m 1046 * Quiesce IOs. 1047 * All sessions with remote ports are unregistered. 1048 */ 1049 csio_hw_stop(hw); 1050 spin_unlock_irq(&hw->lock); 1051 csio_lnodes_unblock_request(hw); 1052 1053 csio_lnodes_exit(hw, 0); 1054 csio_hw_free(hw); 1055 csio_pci_exit(pdev, &bars); 1056 } 1057 1058 /* 1059 * csio_pci_error_detected - PCI error was detected 1060 * @pdev: PCI device 1061 * 1062 */ 1063 static pci_ers_result_t 1064 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1065 { 1066 struct csio_hw *hw = pci_get_drvdata(pdev); 1067 1068 csio_lnodes_block_request(hw); 1069 spin_lock_irq(&hw->lock); 1070 1071 /* Post PCI error detected evt to HW s/m 1072 * HW s/m handles this evt by quiescing IOs, unregisters rports 1073 * and finally takes the device to offline. 1074 */ 1075 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1076 spin_unlock_irq(&hw->lock); 1077 csio_lnodes_unblock_request(hw); 1078 csio_lnodes_exit(hw, 0); 1079 csio_intr_disable(hw, true); 1080 pci_disable_device(pdev); 1081 return state == pci_channel_io_perm_failure ? 1082 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1083 } 1084 1085 /* 1086 * csio_pci_slot_reset - PCI slot has been reset. 1087 * @pdev: PCI device 1088 * 1089 */ 1090 static pci_ers_result_t 1091 csio_pci_slot_reset(struct pci_dev *pdev) 1092 { 1093 struct csio_hw *hw = pci_get_drvdata(pdev); 1094 int ready; 1095 1096 if (pci_enable_device(pdev)) { 1097 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1098 return PCI_ERS_RESULT_DISCONNECT; 1099 } 1100 1101 pci_set_master(pdev); 1102 pci_restore_state(pdev); 1103 pci_save_state(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 /* 1179 * Macros needed to support the PCI Device ID Table ... 1180 */ 1181 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ 1182 static const struct pci_device_id csio_pci_tbl[] = { 1183 /* Define for FCoE uses PF6 */ 1184 #define CH_PCI_DEVICE_ID_FUNCTION 0x6 1185 1186 #define CH_PCI_ID_TABLE_ENTRY(devid) \ 1187 { PCI_VDEVICE(CHELSIO, (devid)), 0 } 1188 1189 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } 1190 1191 #include "t4_pci_id_tbl.h" 1192 1193 static struct pci_driver csio_pci_driver = { 1194 .name = KBUILD_MODNAME, 1195 .driver = { 1196 .owner = THIS_MODULE, 1197 }, 1198 .id_table = csio_pci_tbl, 1199 .probe = csio_probe_one, 1200 .remove = csio_remove_one, 1201 .err_handler = &csio_err_handler, 1202 }; 1203 1204 /* 1205 * csio_init - Chelsio storage driver initialization function. 1206 * 1207 */ 1208 static int __init 1209 csio_init(void) 1210 { 1211 int rv = -ENOMEM; 1212 1213 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1214 1215 csio_dfs_init(); 1216 1217 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1218 if (!csio_fcoe_transport) 1219 goto err; 1220 1221 csio_fcoe_transport_vport = 1222 fc_attach_transport(&csio_fc_transport_vport_funcs); 1223 if (!csio_fcoe_transport_vport) 1224 goto err_vport; 1225 1226 rv = pci_register_driver(&csio_pci_driver); 1227 if (rv) 1228 goto err_pci; 1229 1230 return 0; 1231 1232 err_pci: 1233 fc_release_transport(csio_fcoe_transport_vport); 1234 err_vport: 1235 fc_release_transport(csio_fcoe_transport); 1236 err: 1237 csio_dfs_exit(); 1238 return rv; 1239 } 1240 1241 /* 1242 * csio_exit - Chelsio storage driver uninitialization . 1243 * 1244 * Function that gets called in the unload path. 1245 */ 1246 static void __exit 1247 csio_exit(void) 1248 { 1249 pci_unregister_driver(&csio_pci_driver); 1250 csio_dfs_exit(); 1251 fc_release_transport(csio_fcoe_transport_vport); 1252 fc_release_transport(csio_fcoe_transport); 1253 } 1254 1255 module_init(csio_init); 1256 module_exit(csio_exit); 1257 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1258 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1259 MODULE_LICENSE("Dual BSD/GPL"); 1260 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1261 MODULE_VERSION(CSIO_DRV_VERSION); 1262 MODULE_FIRMWARE(FW_FNAME_T5); 1263 MODULE_FIRMWARE(FW_FNAME_T6); 1264