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 (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) || 214 dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { 215 dev_err(&pdev->dev, "No suitable DMA available.\n"); 216 goto err_release_regions; 217 } 218 219 return 0; 220 221 err_release_regions: 222 pci_release_selected_regions(pdev, *bars); 223 err_disable_device: 224 pci_disable_device(pdev); 225 err: 226 return rv; 227 228 } 229 230 /* 231 * csio_pci_exit - PCI unitialization. 232 * @pdev: PCI device. 233 * @bars: Bars to be released. 234 * 235 */ 236 static void 237 csio_pci_exit(struct pci_dev *pdev, int *bars) 238 { 239 pci_release_selected_regions(pdev, *bars); 240 pci_disable_device(pdev); 241 } 242 243 /* 244 * csio_hw_init_workers - Initialize the HW module's worker threads. 245 * @hw: HW module. 246 * 247 */ 248 static void 249 csio_hw_init_workers(struct csio_hw *hw) 250 { 251 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 252 } 253 254 static void 255 csio_hw_exit_workers(struct csio_hw *hw) 256 { 257 cancel_work_sync(&hw->evtq_work); 258 flush_scheduled_work(); 259 } 260 261 static int 262 csio_create_queues(struct csio_hw *hw) 263 { 264 int i, j; 265 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 266 int rv; 267 struct csio_scsi_cpu_info *info; 268 269 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 270 return 0; 271 272 if (hw->intr_mode != CSIO_IM_MSIX) { 273 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 274 0, hw->pport[0].portid, false, NULL); 275 if (rv != 0) { 276 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 277 return rv; 278 } 279 } 280 281 /* FW event queue */ 282 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 283 csio_get_fwevt_intr_idx(hw), 284 hw->pport[0].portid, true, NULL); 285 if (rv != 0) { 286 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 287 return rv; 288 } 289 290 /* Create mgmt queue */ 291 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 292 mgmtm->iq_idx, hw->pport[0].portid, NULL); 293 294 if (rv != 0) { 295 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 296 goto err; 297 } 298 299 /* Create SCSI queues */ 300 for (i = 0; i < hw->num_pports; i++) { 301 info = &hw->scsi_cpu_info[i]; 302 303 for (j = 0; j < info->max_cpus; j++) { 304 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 305 306 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 307 sqset->intr_idx, i, false, NULL); 308 if (rv != 0) { 309 csio_err(hw, 310 "SCSI module IQ config failed [%d][%d]:%d\n", 311 i, j, rv); 312 goto err; 313 } 314 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 315 sqset->iq_idx, i, NULL); 316 if (rv != 0) { 317 csio_err(hw, 318 "SCSI module EQ config failed [%d][%d]:%d\n", 319 i, j, rv); 320 goto err; 321 } 322 } /* for all CPUs */ 323 } /* For all ports */ 324 325 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 326 return 0; 327 err: 328 csio_wr_destroy_queues(hw, true); 329 return -EINVAL; 330 } 331 332 /* 333 * csio_config_queues - Configure the DMA queues. 334 * @hw: HW module. 335 * 336 * Allocates memory for queues are registers them with FW. 337 */ 338 int 339 csio_config_queues(struct csio_hw *hw) 340 { 341 int i, j, idx, k = 0; 342 int rv; 343 struct csio_scsi_qset *sqset; 344 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 345 struct csio_scsi_qset *orig; 346 struct csio_scsi_cpu_info *info; 347 348 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 349 return csio_create_queues(hw); 350 351 /* Calculate number of SCSI queues for MSIX we would like */ 352 hw->num_scsi_msix_cpus = num_online_cpus(); 353 hw->num_sqsets = num_online_cpus() * hw->num_pports; 354 355 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 356 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 357 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 358 } 359 360 /* Initialize max_cpus, may get reduced during msix allocations */ 361 for (i = 0; i < hw->num_pports; i++) 362 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 363 364 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 365 hw->num_sqsets, hw->num_scsi_msix_cpus); 366 367 csio_intr_enable(hw); 368 369 if (hw->intr_mode != CSIO_IM_MSIX) { 370 371 /* Allocate Forward interrupt iq. */ 372 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 373 CSIO_INTR_WRSIZE, CSIO_INGRESS, 374 (void *)hw, 0, 0, NULL); 375 if (hw->intr_iq_idx == -1) { 376 csio_err(hw, 377 "Forward interrupt queue creation failed\n"); 378 goto intr_disable; 379 } 380 } 381 382 /* Allocate the FW evt queue */ 383 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 384 CSIO_FWEVT_WRSIZE, 385 CSIO_INGRESS, (void *)hw, 386 CSIO_FWEVT_FLBUFS, 0, 387 csio_fwevt_intx_handler); 388 if (hw->fwevt_iq_idx == -1) { 389 csio_err(hw, "FW evt queue creation failed\n"); 390 goto intr_disable; 391 } 392 393 /* Allocate the mgmt queue */ 394 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 395 CSIO_MGMT_EQ_WRSIZE, 396 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 397 if (mgmtm->eq_idx == -1) { 398 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 399 goto intr_disable; 400 } 401 402 /* Use FW IQ for MGMT req completion */ 403 mgmtm->iq_idx = hw->fwevt_iq_idx; 404 405 /* Allocate SCSI queues */ 406 for (i = 0; i < hw->num_pports; i++) { 407 info = &hw->scsi_cpu_info[i]; 408 409 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 410 sqset = &hw->sqset[i][j]; 411 412 if (j >= info->max_cpus) { 413 k = j % info->max_cpus; 414 orig = &hw->sqset[i][k]; 415 sqset->eq_idx = orig->eq_idx; 416 sqset->iq_idx = orig->iq_idx; 417 continue; 418 } 419 420 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 421 CSIO_EGRESS, (void *)hw, 0, 0, 422 NULL); 423 if (idx == -1) { 424 csio_err(hw, "EQ creation failed for idx:%d\n", 425 idx); 426 goto intr_disable; 427 } 428 429 sqset->eq_idx = idx; 430 431 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 432 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 433 (void *)hw, 0, 0, 434 csio_scsi_intx_handler); 435 if (idx == -1) { 436 csio_err(hw, "IQ creation failed for idx:%d\n", 437 idx); 438 goto intr_disable; 439 } 440 sqset->iq_idx = idx; 441 } /* for all CPUs */ 442 } /* For all ports */ 443 444 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 445 446 rv = csio_create_queues(hw); 447 if (rv != 0) 448 goto intr_disable; 449 450 /* 451 * Now request IRQs for the vectors. In the event of a failure, 452 * cleanup is handled internally by this function. 453 */ 454 rv = csio_request_irqs(hw); 455 if (rv != 0) 456 return -EINVAL; 457 458 return 0; 459 460 intr_disable: 461 csio_intr_disable(hw, false); 462 463 return -EINVAL; 464 } 465 466 static int 467 csio_resource_alloc(struct csio_hw *hw) 468 { 469 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 470 int rv = -ENOMEM; 471 472 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 473 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 474 475 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 476 sizeof(struct csio_mb)); 477 if (!hw->mb_mempool) 478 goto err; 479 480 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 481 sizeof(struct csio_rnode)); 482 if (!hw->rnode_mempool) 483 goto err_free_mb_mempool; 484 485 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", 486 &hw->pdev->dev, CSIO_SCSI_RSP_LEN, 487 8, 0); 488 if (!hw->scsi_dma_pool) 489 goto err_free_rn_pool; 490 491 return 0; 492 493 err_free_rn_pool: 494 mempool_destroy(hw->rnode_mempool); 495 hw->rnode_mempool = NULL; 496 err_free_mb_mempool: 497 mempool_destroy(hw->mb_mempool); 498 hw->mb_mempool = NULL; 499 err: 500 return rv; 501 } 502 503 static void 504 csio_resource_free(struct csio_hw *hw) 505 { 506 dma_pool_destroy(hw->scsi_dma_pool); 507 hw->scsi_dma_pool = NULL; 508 mempool_destroy(hw->rnode_mempool); 509 hw->rnode_mempool = NULL; 510 mempool_destroy(hw->mb_mempool); 511 hw->mb_mempool = NULL; 512 } 513 514 /* 515 * csio_hw_alloc - Allocate and initialize the HW module. 516 * @pdev: PCI device. 517 * 518 * Allocates HW structure, DMA, memory resources, maps BARS to 519 * host memory and initializes HW module. 520 */ 521 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 522 { 523 struct csio_hw *hw; 524 525 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 526 if (!hw) 527 goto err; 528 529 hw->pdev = pdev; 530 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 531 532 /* memory pool/DMA pool allocation */ 533 if (csio_resource_alloc(hw)) 534 goto err_free_hw; 535 536 /* Get the start address of registers from BAR 0 */ 537 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 538 pci_resource_len(pdev, 0)); 539 if (!hw->regstart) { 540 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 541 hw->regstart); 542 goto err_resource_free; 543 } 544 545 csio_hw_init_workers(hw); 546 547 if (csio_hw_init(hw)) 548 goto err_unmap_bar; 549 550 csio_dfs_create(hw); 551 552 csio_dbg(hw, "hw:%p\n", hw); 553 554 return hw; 555 556 err_unmap_bar: 557 csio_hw_exit_workers(hw); 558 iounmap(hw->regstart); 559 err_resource_free: 560 csio_resource_free(hw); 561 err_free_hw: 562 kfree(hw); 563 err: 564 return NULL; 565 } 566 567 /* 568 * csio_hw_free - Uninitialize and free the HW module. 569 * @hw: The HW module 570 * 571 * Disable interrupts, uninit the HW module, free resources, free hw. 572 */ 573 static void 574 csio_hw_free(struct csio_hw *hw) 575 { 576 csio_intr_disable(hw, true); 577 csio_hw_exit_workers(hw); 578 csio_hw_exit(hw); 579 iounmap(hw->regstart); 580 csio_dfs_destroy(hw); 581 csio_resource_free(hw); 582 kfree(hw); 583 } 584 585 /** 586 * csio_shost_init - Create and initialize the lnode module. 587 * @hw: The HW module. 588 * @dev: The device associated with this invocation. 589 * @probe: Called from probe context or not? 590 * @os_pln: Parent lnode if any. 591 * 592 * Allocates lnode structure via scsi_host_alloc, initializes 593 * shost, initializes lnode module and registers with SCSI ML 594 * via scsi_host_add. This function is shared between physical and 595 * virtual node ports. 596 */ 597 struct csio_lnode * 598 csio_shost_init(struct csio_hw *hw, struct device *dev, 599 bool probe, struct csio_lnode *pln) 600 { 601 struct Scsi_Host *shost = NULL; 602 struct csio_lnode *ln; 603 604 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 605 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 606 607 /* 608 * hw->pdev is the physical port's PCI dev structure, 609 * which will be different from the NPIV dev structure. 610 */ 611 if (dev == &hw->pdev->dev) 612 shost = scsi_host_alloc( 613 &csio_fcoe_shost_template, 614 sizeof(struct csio_lnode)); 615 else 616 shost = scsi_host_alloc( 617 &csio_fcoe_shost_vport_template, 618 sizeof(struct csio_lnode)); 619 620 if (!shost) 621 goto err; 622 623 ln = shost_priv(shost); 624 memset(ln, 0, sizeof(struct csio_lnode)); 625 626 /* Link common lnode to this lnode */ 627 ln->dev_num = (shost->host_no << 16); 628 629 shost->can_queue = CSIO_MAX_QUEUE; 630 shost->this_id = -1; 631 shost->unique_id = shost->host_no; 632 shost->max_cmd_len = 16; /* Max CDB length supported */ 633 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 634 hw->fres_info.max_ssns); 635 shost->max_lun = CSIO_MAX_LUN; 636 if (dev == &hw->pdev->dev) 637 shost->transportt = csio_fcoe_transport; 638 else 639 shost->transportt = csio_fcoe_transport_vport; 640 641 /* root lnode */ 642 if (!hw->rln) 643 hw->rln = ln; 644 645 /* Other initialization here: Common, Transport specific */ 646 if (csio_lnode_init(ln, hw, pln)) 647 goto err_shost_put; 648 649 if (scsi_add_host(shost, dev)) 650 goto err_lnode_exit; 651 652 return ln; 653 654 err_lnode_exit: 655 csio_lnode_exit(ln); 656 err_shost_put: 657 scsi_host_put(shost); 658 err: 659 return NULL; 660 } 661 662 /** 663 * csio_shost_exit - De-instantiate the shost. 664 * @ln: The lnode module corresponding to the shost. 665 * 666 */ 667 void 668 csio_shost_exit(struct csio_lnode *ln) 669 { 670 struct Scsi_Host *shost = csio_ln_to_shost(ln); 671 struct csio_hw *hw = csio_lnode_to_hw(ln); 672 673 /* Inform transport */ 674 fc_remove_host(shost); 675 676 /* Inform SCSI ML */ 677 scsi_remove_host(shost); 678 679 /* Flush all the events, so that any rnode removal events 680 * already queued are all handled, before we remove the lnode. 681 */ 682 spin_lock_irq(&hw->lock); 683 csio_evtq_flush(hw); 684 spin_unlock_irq(&hw->lock); 685 686 csio_lnode_exit(ln); 687 scsi_host_put(shost); 688 } 689 690 struct csio_lnode * 691 csio_lnode_alloc(struct csio_hw *hw) 692 { 693 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 694 } 695 696 void 697 csio_lnodes_block_request(struct csio_hw *hw) 698 { 699 struct Scsi_Host *shost; 700 struct csio_lnode *sln; 701 struct csio_lnode *ln; 702 struct list_head *cur_ln, *cur_cln; 703 struct csio_lnode **lnode_list; 704 int cur_cnt = 0, ii; 705 706 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 707 GFP_KERNEL); 708 if (!lnode_list) { 709 csio_err(hw, "Failed to allocate lnodes_list"); 710 return; 711 } 712 713 spin_lock_irq(&hw->lock); 714 /* Traverse sibling lnodes */ 715 list_for_each(cur_ln, &hw->sln_head) { 716 sln = (struct csio_lnode *) cur_ln; 717 lnode_list[cur_cnt++] = sln; 718 719 /* Traverse children lnodes */ 720 list_for_each(cur_cln, &sln->cln_head) 721 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 722 } 723 spin_unlock_irq(&hw->lock); 724 725 for (ii = 0; ii < cur_cnt; ii++) { 726 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 727 ln = lnode_list[ii]; 728 shost = csio_ln_to_shost(ln); 729 scsi_block_requests(shost); 730 731 } 732 kfree(lnode_list); 733 } 734 735 void 736 csio_lnodes_unblock_request(struct csio_hw *hw) 737 { 738 struct csio_lnode *ln; 739 struct Scsi_Host *shost; 740 struct csio_lnode *sln; 741 struct list_head *cur_ln, *cur_cln; 742 struct csio_lnode **lnode_list; 743 int cur_cnt = 0, ii; 744 745 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 746 GFP_KERNEL); 747 if (!lnode_list) { 748 csio_err(hw, "Failed to allocate lnodes_list"); 749 return; 750 } 751 752 spin_lock_irq(&hw->lock); 753 /* Traverse sibling lnodes */ 754 list_for_each(cur_ln, &hw->sln_head) { 755 sln = (struct csio_lnode *) cur_ln; 756 lnode_list[cur_cnt++] = sln; 757 758 /* Traverse children lnodes */ 759 list_for_each(cur_cln, &sln->cln_head) 760 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 761 } 762 spin_unlock_irq(&hw->lock); 763 764 for (ii = 0; ii < cur_cnt; ii++) { 765 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 766 ln = lnode_list[ii]; 767 shost = csio_ln_to_shost(ln); 768 scsi_unblock_requests(shost); 769 } 770 kfree(lnode_list); 771 } 772 773 void 774 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 775 { 776 struct csio_lnode *ln; 777 struct Scsi_Host *shost; 778 struct csio_lnode *sln; 779 struct list_head *cur_ln, *cur_cln; 780 struct csio_lnode **lnode_list; 781 int cur_cnt = 0, ii; 782 783 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 784 GFP_KERNEL); 785 if (!lnode_list) { 786 csio_err(hw, "Failed to allocate lnodes_list"); 787 return; 788 } 789 790 spin_lock_irq(&hw->lock); 791 /* Traverse sibling lnodes */ 792 list_for_each(cur_ln, &hw->sln_head) { 793 sln = (struct csio_lnode *) cur_ln; 794 if (sln->portid != portid) 795 continue; 796 797 lnode_list[cur_cnt++] = sln; 798 799 /* Traverse children lnodes */ 800 list_for_each(cur_cln, &sln->cln_head) 801 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 802 } 803 spin_unlock_irq(&hw->lock); 804 805 for (ii = 0; ii < cur_cnt; ii++) { 806 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 807 ln = lnode_list[ii]; 808 shost = csio_ln_to_shost(ln); 809 scsi_block_requests(shost); 810 } 811 kfree(lnode_list); 812 } 813 814 void 815 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 816 { 817 struct csio_lnode *ln; 818 struct Scsi_Host *shost; 819 struct csio_lnode *sln; 820 struct list_head *cur_ln, *cur_cln; 821 struct csio_lnode **lnode_list; 822 int cur_cnt = 0, ii; 823 824 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 825 GFP_KERNEL); 826 if (!lnode_list) { 827 csio_err(hw, "Failed to allocate lnodes_list"); 828 return; 829 } 830 831 spin_lock_irq(&hw->lock); 832 /* Traverse sibling lnodes */ 833 list_for_each(cur_ln, &hw->sln_head) { 834 sln = (struct csio_lnode *) cur_ln; 835 if (sln->portid != portid) 836 continue; 837 lnode_list[cur_cnt++] = sln; 838 839 /* Traverse children lnodes */ 840 list_for_each(cur_cln, &sln->cln_head) 841 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 842 } 843 spin_unlock_irq(&hw->lock); 844 845 for (ii = 0; ii < cur_cnt; ii++) { 846 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 847 ln = lnode_list[ii]; 848 shost = csio_ln_to_shost(ln); 849 scsi_unblock_requests(shost); 850 } 851 kfree(lnode_list); 852 } 853 854 void 855 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 856 { 857 struct csio_lnode *sln; 858 struct csio_lnode *ln; 859 struct list_head *cur_ln, *cur_cln; 860 struct csio_lnode **lnode_list; 861 int cur_cnt = 0, ii; 862 863 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 864 GFP_KERNEL); 865 if (!lnode_list) { 866 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 867 return; 868 } 869 870 /* Get all child lnodes(NPIV ports) */ 871 spin_lock_irq(&hw->lock); 872 list_for_each(cur_ln, &hw->sln_head) { 873 sln = (struct csio_lnode *) cur_ln; 874 875 /* Traverse children lnodes */ 876 list_for_each(cur_cln, &sln->cln_head) 877 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 878 } 879 spin_unlock_irq(&hw->lock); 880 881 /* Delete NPIV lnodes */ 882 for (ii = 0; ii < cur_cnt; ii++) { 883 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 884 ln = lnode_list[ii]; 885 fc_vport_terminate(ln->fc_vport); 886 } 887 888 /* Delete only npiv lnodes */ 889 if (npiv) 890 goto free_lnodes; 891 892 cur_cnt = 0; 893 /* Get all physical lnodes */ 894 spin_lock_irq(&hw->lock); 895 /* Traverse sibling lnodes */ 896 list_for_each(cur_ln, &hw->sln_head) { 897 sln = (struct csio_lnode *) cur_ln; 898 lnode_list[cur_cnt++] = sln; 899 } 900 spin_unlock_irq(&hw->lock); 901 902 /* Delete physical lnodes */ 903 for (ii = 0; ii < cur_cnt; ii++) { 904 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 905 csio_shost_exit(lnode_list[ii]); 906 } 907 908 free_lnodes: 909 kfree(lnode_list); 910 } 911 912 /* 913 * csio_lnode_init_post: Set lnode attributes after starting HW. 914 * @ln: lnode. 915 * 916 */ 917 static void 918 csio_lnode_init_post(struct csio_lnode *ln) 919 { 920 struct Scsi_Host *shost = csio_ln_to_shost(ln); 921 922 csio_fchost_attr_init(ln); 923 924 scsi_scan_host(shost); 925 } 926 927 /* 928 * csio_probe_one - Instantiate this function. 929 * @pdev: PCI device 930 * @id: Device ID 931 * 932 * This is the .probe() callback of the driver. This function: 933 * - Initializes the PCI function by enabling MMIO, setting bus 934 * mastership and setting DMA mask. 935 * - Allocates HW structure, DMA, memory resources, maps BARS to 936 * host memory and initializes HW module. 937 * - Allocates lnode structure via scsi_host_alloc, initializes 938 * shost, initialized lnode module and registers with SCSI ML 939 * via scsi_host_add. 940 * - Enables interrupts, and starts the chip by kicking off the 941 * HW state machine. 942 * - Once hardware is ready, initiated scan of the host via 943 * scsi_scan_host. 944 */ 945 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 946 { 947 int rv; 948 int bars; 949 int i; 950 struct csio_hw *hw; 951 struct csio_lnode *ln; 952 953 /* probe only T5 and T6 cards */ 954 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && 955 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) 956 return -ENODEV; 957 958 rv = csio_pci_init(pdev, &bars); 959 if (rv) 960 goto err; 961 962 hw = csio_hw_alloc(pdev); 963 if (!hw) { 964 rv = -ENODEV; 965 goto err_pci_exit; 966 } 967 968 if (!pcie_relaxed_ordering_enabled(pdev)) 969 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; 970 971 pci_set_drvdata(pdev, hw); 972 973 rv = csio_hw_start(hw); 974 if (rv) { 975 if (rv == -EINVAL) { 976 dev_err(&pdev->dev, 977 "Failed to start FW, continuing in debug mode.\n"); 978 return 0; 979 } 980 goto err_lnode_exit; 981 } 982 983 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 984 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 985 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 986 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 987 FW_HDR_FW_VER_BUILD_G(hw->fwrev)); 988 989 for (i = 0; i < hw->num_pports; i++) { 990 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 991 if (!ln) { 992 rv = -ENODEV; 993 break; 994 } 995 /* Initialize portid */ 996 ln->portid = hw->pport[i].portid; 997 998 spin_lock_irq(&hw->lock); 999 if (csio_lnode_start(ln) != 0) 1000 rv = -ENODEV; 1001 spin_unlock_irq(&hw->lock); 1002 1003 if (rv) 1004 break; 1005 1006 csio_lnode_init_post(ln); 1007 } 1008 1009 if (rv) 1010 goto err_lnode_exit; 1011 1012 return 0; 1013 1014 err_lnode_exit: 1015 csio_lnodes_block_request(hw); 1016 spin_lock_irq(&hw->lock); 1017 csio_hw_stop(hw); 1018 spin_unlock_irq(&hw->lock); 1019 csio_lnodes_unblock_request(hw); 1020 csio_lnodes_exit(hw, 0); 1021 csio_hw_free(hw); 1022 err_pci_exit: 1023 csio_pci_exit(pdev, &bars); 1024 err: 1025 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1026 return rv; 1027 } 1028 1029 /* 1030 * csio_remove_one - Remove one instance of the driver at this PCI function. 1031 * @pdev: PCI device 1032 * 1033 * Used during hotplug operation. 1034 */ 1035 static void csio_remove_one(struct pci_dev *pdev) 1036 { 1037 struct csio_hw *hw = pci_get_drvdata(pdev); 1038 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1039 1040 csio_lnodes_block_request(hw); 1041 spin_lock_irq(&hw->lock); 1042 1043 /* Stops lnode, Rnode s/m 1044 * Quiesce IOs. 1045 * All sessions with remote ports are unregistered. 1046 */ 1047 csio_hw_stop(hw); 1048 spin_unlock_irq(&hw->lock); 1049 csio_lnodes_unblock_request(hw); 1050 1051 csio_lnodes_exit(hw, 0); 1052 csio_hw_free(hw); 1053 csio_pci_exit(pdev, &bars); 1054 } 1055 1056 /* 1057 * csio_pci_error_detected - PCI error was detected 1058 * @pdev: PCI device 1059 * 1060 */ 1061 static pci_ers_result_t 1062 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1063 { 1064 struct csio_hw *hw = pci_get_drvdata(pdev); 1065 1066 csio_lnodes_block_request(hw); 1067 spin_lock_irq(&hw->lock); 1068 1069 /* Post PCI error detected evt to HW s/m 1070 * HW s/m handles this evt by quiescing IOs, unregisters rports 1071 * and finally takes the device to offline. 1072 */ 1073 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1074 spin_unlock_irq(&hw->lock); 1075 csio_lnodes_unblock_request(hw); 1076 csio_lnodes_exit(hw, 0); 1077 csio_intr_disable(hw, true); 1078 pci_disable_device(pdev); 1079 return state == pci_channel_io_perm_failure ? 1080 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1081 } 1082 1083 /* 1084 * csio_pci_slot_reset - PCI slot has been reset. 1085 * @pdev: PCI device 1086 * 1087 */ 1088 static pci_ers_result_t 1089 csio_pci_slot_reset(struct pci_dev *pdev) 1090 { 1091 struct csio_hw *hw = pci_get_drvdata(pdev); 1092 int ready; 1093 1094 if (pci_enable_device(pdev)) { 1095 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1096 return PCI_ERS_RESULT_DISCONNECT; 1097 } 1098 1099 pci_set_master(pdev); 1100 pci_restore_state(pdev); 1101 pci_save_state(pdev); 1102 1103 /* Bring HW s/m to ready state. 1104 * but don't resume IOs. 1105 */ 1106 spin_lock_irq(&hw->lock); 1107 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1108 ready = csio_is_hw_ready(hw); 1109 spin_unlock_irq(&hw->lock); 1110 1111 if (ready) { 1112 return PCI_ERS_RESULT_RECOVERED; 1113 } else { 1114 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1115 return PCI_ERS_RESULT_DISCONNECT; 1116 } 1117 } 1118 1119 /* 1120 * csio_pci_resume - Resume normal operations 1121 * @pdev: PCI device 1122 * 1123 */ 1124 static void 1125 csio_pci_resume(struct pci_dev *pdev) 1126 { 1127 struct csio_hw *hw = pci_get_drvdata(pdev); 1128 struct csio_lnode *ln; 1129 int rv = 0; 1130 int i; 1131 1132 /* Bring the LINK UP and Resume IO */ 1133 1134 for (i = 0; i < hw->num_pports; i++) { 1135 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1136 if (!ln) { 1137 rv = -ENODEV; 1138 break; 1139 } 1140 /* Initialize portid */ 1141 ln->portid = hw->pport[i].portid; 1142 1143 spin_lock_irq(&hw->lock); 1144 if (csio_lnode_start(ln) != 0) 1145 rv = -ENODEV; 1146 spin_unlock_irq(&hw->lock); 1147 1148 if (rv) 1149 break; 1150 1151 csio_lnode_init_post(ln); 1152 } 1153 1154 if (rv) 1155 goto err_resume_exit; 1156 1157 return; 1158 1159 err_resume_exit: 1160 csio_lnodes_block_request(hw); 1161 spin_lock_irq(&hw->lock); 1162 csio_hw_stop(hw); 1163 spin_unlock_irq(&hw->lock); 1164 csio_lnodes_unblock_request(hw); 1165 csio_lnodes_exit(hw, 0); 1166 csio_hw_free(hw); 1167 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1168 } 1169 1170 static struct pci_error_handlers csio_err_handler = { 1171 .error_detected = csio_pci_error_detected, 1172 .slot_reset = csio_pci_slot_reset, 1173 .resume = csio_pci_resume, 1174 }; 1175 1176 /* 1177 * Macros needed to support the PCI Device ID Table ... 1178 */ 1179 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ 1180 static const struct pci_device_id csio_pci_tbl[] = { 1181 /* Define for FCoE uses PF6 */ 1182 #define CH_PCI_DEVICE_ID_FUNCTION 0x6 1183 1184 #define CH_PCI_ID_TABLE_ENTRY(devid) \ 1185 { PCI_VDEVICE(CHELSIO, (devid)), 0 } 1186 1187 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } 1188 1189 #include "t4_pci_id_tbl.h" 1190 1191 static struct pci_driver csio_pci_driver = { 1192 .name = KBUILD_MODNAME, 1193 .driver = { 1194 .owner = THIS_MODULE, 1195 }, 1196 .id_table = csio_pci_tbl, 1197 .probe = csio_probe_one, 1198 .remove = csio_remove_one, 1199 .err_handler = &csio_err_handler, 1200 }; 1201 1202 /* 1203 * csio_init - Chelsio storage driver initialization function. 1204 * 1205 */ 1206 static int __init 1207 csio_init(void) 1208 { 1209 int rv = -ENOMEM; 1210 1211 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1212 1213 csio_dfs_init(); 1214 1215 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1216 if (!csio_fcoe_transport) 1217 goto err; 1218 1219 csio_fcoe_transport_vport = 1220 fc_attach_transport(&csio_fc_transport_vport_funcs); 1221 if (!csio_fcoe_transport_vport) 1222 goto err_vport; 1223 1224 rv = pci_register_driver(&csio_pci_driver); 1225 if (rv) 1226 goto err_pci; 1227 1228 return 0; 1229 1230 err_pci: 1231 fc_release_transport(csio_fcoe_transport_vport); 1232 err_vport: 1233 fc_release_transport(csio_fcoe_transport); 1234 err: 1235 csio_dfs_exit(); 1236 return rv; 1237 } 1238 1239 /* 1240 * csio_exit - Chelsio storage driver uninitialization . 1241 * 1242 * Function that gets called in the unload path. 1243 */ 1244 static void __exit 1245 csio_exit(void) 1246 { 1247 pci_unregister_driver(&csio_pci_driver); 1248 csio_dfs_exit(); 1249 fc_release_transport(csio_fcoe_transport_vport); 1250 fc_release_transport(csio_fcoe_transport); 1251 } 1252 1253 module_init(csio_init); 1254 module_exit(csio_exit); 1255 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1256 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1257 MODULE_LICENSE("Dual BSD/GPL"); 1258 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1259 MODULE_VERSION(CSIO_DRV_VERSION); 1260 MODULE_FIRMWARE(FW_FNAME_T5); 1261 MODULE_FIRMWARE(FW_FNAME_T6); 1262