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_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev, 489 CSIO_SCSI_RSP_LEN, 8, 0); 490 if (!hw->scsi_pci_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 pci_pool_destroy(hw->scsi_pci_pool); 509 hw->scsi_pci_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(shost, 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 cards */ 956 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK))) 957 return -ENODEV; 958 959 rv = csio_pci_init(pdev, &bars); 960 if (rv) 961 goto err; 962 963 hw = csio_hw_alloc(pdev); 964 if (!hw) { 965 rv = -ENODEV; 966 goto err_pci_exit; 967 } 968 969 pci_set_drvdata(pdev, hw); 970 971 if (csio_hw_start(hw) != 0) { 972 dev_err(&pdev->dev, 973 "Failed to start FW, continuing in debug mode.\n"); 974 return 0; 975 } 976 977 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 978 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 979 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 980 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 981 FW_HDR_FW_VER_BUILD_G(hw->fwrev)); 982 983 for (i = 0; i < hw->num_pports; i++) { 984 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 985 if (!ln) { 986 rv = -ENODEV; 987 break; 988 } 989 /* Initialize portid */ 990 ln->portid = hw->pport[i].portid; 991 992 spin_lock_irq(&hw->lock); 993 if (csio_lnode_start(ln) != 0) 994 rv = -ENODEV; 995 spin_unlock_irq(&hw->lock); 996 997 if (rv) 998 break; 999 1000 csio_lnode_init_post(ln); 1001 } 1002 1003 if (rv) 1004 goto err_lnode_exit; 1005 1006 return 0; 1007 1008 err_lnode_exit: 1009 csio_lnodes_block_request(hw); 1010 spin_lock_irq(&hw->lock); 1011 csio_hw_stop(hw); 1012 spin_unlock_irq(&hw->lock); 1013 csio_lnodes_unblock_request(hw); 1014 csio_lnodes_exit(hw, 0); 1015 csio_hw_free(hw); 1016 err_pci_exit: 1017 csio_pci_exit(pdev, &bars); 1018 err: 1019 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1020 return rv; 1021 } 1022 1023 /* 1024 * csio_remove_one - Remove one instance of the driver at this PCI function. 1025 * @pdev: PCI device 1026 * 1027 * Used during hotplug operation. 1028 */ 1029 static void csio_remove_one(struct pci_dev *pdev) 1030 { 1031 struct csio_hw *hw = pci_get_drvdata(pdev); 1032 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1033 1034 csio_lnodes_block_request(hw); 1035 spin_lock_irq(&hw->lock); 1036 1037 /* Stops lnode, Rnode s/m 1038 * Quiesce IOs. 1039 * All sessions with remote ports are unregistered. 1040 */ 1041 csio_hw_stop(hw); 1042 spin_unlock_irq(&hw->lock); 1043 csio_lnodes_unblock_request(hw); 1044 1045 csio_lnodes_exit(hw, 0); 1046 csio_hw_free(hw); 1047 csio_pci_exit(pdev, &bars); 1048 } 1049 1050 /* 1051 * csio_pci_error_detected - PCI error was detected 1052 * @pdev: PCI device 1053 * 1054 */ 1055 static pci_ers_result_t 1056 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1057 { 1058 struct csio_hw *hw = pci_get_drvdata(pdev); 1059 1060 csio_lnodes_block_request(hw); 1061 spin_lock_irq(&hw->lock); 1062 1063 /* Post PCI error detected evt to HW s/m 1064 * HW s/m handles this evt by quiescing IOs, unregisters rports 1065 * and finally takes the device to offline. 1066 */ 1067 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1068 spin_unlock_irq(&hw->lock); 1069 csio_lnodes_unblock_request(hw); 1070 csio_lnodes_exit(hw, 0); 1071 csio_intr_disable(hw, true); 1072 pci_disable_device(pdev); 1073 return state == pci_channel_io_perm_failure ? 1074 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1075 } 1076 1077 /* 1078 * csio_pci_slot_reset - PCI slot has been reset. 1079 * @pdev: PCI device 1080 * 1081 */ 1082 static pci_ers_result_t 1083 csio_pci_slot_reset(struct pci_dev *pdev) 1084 { 1085 struct csio_hw *hw = pci_get_drvdata(pdev); 1086 int ready; 1087 1088 if (pci_enable_device(pdev)) { 1089 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1090 return PCI_ERS_RESULT_DISCONNECT; 1091 } 1092 1093 pci_set_master(pdev); 1094 pci_restore_state(pdev); 1095 pci_save_state(pdev); 1096 pci_cleanup_aer_uncorrect_error_status(pdev); 1097 1098 /* Bring HW s/m to ready state. 1099 * but don't resume IOs. 1100 */ 1101 spin_lock_irq(&hw->lock); 1102 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1103 ready = csio_is_hw_ready(hw); 1104 spin_unlock_irq(&hw->lock); 1105 1106 if (ready) { 1107 return PCI_ERS_RESULT_RECOVERED; 1108 } else { 1109 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1110 return PCI_ERS_RESULT_DISCONNECT; 1111 } 1112 } 1113 1114 /* 1115 * csio_pci_resume - Resume normal operations 1116 * @pdev: PCI device 1117 * 1118 */ 1119 static void 1120 csio_pci_resume(struct pci_dev *pdev) 1121 { 1122 struct csio_hw *hw = pci_get_drvdata(pdev); 1123 struct csio_lnode *ln; 1124 int rv = 0; 1125 int i; 1126 1127 /* Bring the LINK UP and Resume IO */ 1128 1129 for (i = 0; i < hw->num_pports; i++) { 1130 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1131 if (!ln) { 1132 rv = -ENODEV; 1133 break; 1134 } 1135 /* Initialize portid */ 1136 ln->portid = hw->pport[i].portid; 1137 1138 spin_lock_irq(&hw->lock); 1139 if (csio_lnode_start(ln) != 0) 1140 rv = -ENODEV; 1141 spin_unlock_irq(&hw->lock); 1142 1143 if (rv) 1144 break; 1145 1146 csio_lnode_init_post(ln); 1147 } 1148 1149 if (rv) 1150 goto err_resume_exit; 1151 1152 return; 1153 1154 err_resume_exit: 1155 csio_lnodes_block_request(hw); 1156 spin_lock_irq(&hw->lock); 1157 csio_hw_stop(hw); 1158 spin_unlock_irq(&hw->lock); 1159 csio_lnodes_unblock_request(hw); 1160 csio_lnodes_exit(hw, 0); 1161 csio_hw_free(hw); 1162 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1163 } 1164 1165 static struct pci_error_handlers csio_err_handler = { 1166 .error_detected = csio_pci_error_detected, 1167 .slot_reset = csio_pci_slot_reset, 1168 .resume = csio_pci_resume, 1169 }; 1170 1171 /* 1172 * Macros needed to support the PCI Device ID Table ... 1173 */ 1174 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ 1175 static const struct pci_device_id csio_pci_tbl[] = { 1176 /* Define for FCoE uses PF6 */ 1177 #define CH_PCI_DEVICE_ID_FUNCTION 0x6 1178 1179 #define CH_PCI_ID_TABLE_ENTRY(devid) \ 1180 { PCI_VDEVICE(CHELSIO, (devid)), 0 } 1181 1182 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } 1183 1184 #include "t4_pci_id_tbl.h" 1185 1186 static struct pci_driver csio_pci_driver = { 1187 .name = KBUILD_MODNAME, 1188 .driver = { 1189 .owner = THIS_MODULE, 1190 }, 1191 .id_table = csio_pci_tbl, 1192 .probe = csio_probe_one, 1193 .remove = csio_remove_one, 1194 .err_handler = &csio_err_handler, 1195 }; 1196 1197 /* 1198 * csio_init - Chelsio storage driver initialization function. 1199 * 1200 */ 1201 static int __init 1202 csio_init(void) 1203 { 1204 int rv = -ENOMEM; 1205 1206 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1207 1208 csio_dfs_init(); 1209 1210 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1211 if (!csio_fcoe_transport) 1212 goto err; 1213 1214 csio_fcoe_transport_vport = 1215 fc_attach_transport(&csio_fc_transport_vport_funcs); 1216 if (!csio_fcoe_transport_vport) 1217 goto err_vport; 1218 1219 rv = pci_register_driver(&csio_pci_driver); 1220 if (rv) 1221 goto err_pci; 1222 1223 return 0; 1224 1225 err_pci: 1226 fc_release_transport(csio_fcoe_transport_vport); 1227 err_vport: 1228 fc_release_transport(csio_fcoe_transport); 1229 err: 1230 csio_dfs_exit(); 1231 return rv; 1232 } 1233 1234 /* 1235 * csio_exit - Chelsio storage driver uninitialization . 1236 * 1237 * Function that gets called in the unload path. 1238 */ 1239 static void __exit 1240 csio_exit(void) 1241 { 1242 pci_unregister_driver(&csio_pci_driver); 1243 csio_dfs_exit(); 1244 fc_release_transport(csio_fcoe_transport_vport); 1245 fc_release_transport(csio_fcoe_transport); 1246 } 1247 1248 module_init(csio_init); 1249 module_exit(csio_exit); 1250 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1251 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1252 MODULE_LICENSE(CSIO_DRV_LICENSE); 1253 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1254 MODULE_VERSION(CSIO_DRV_VERSION); 1255 MODULE_FIRMWARE(FW_FNAME_T5); 1256