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 void 158 csio_dfs_destroy(struct csio_hw *hw) 159 { 160 debugfs_remove_recursive(hw->debugfs_root); 161 } 162 163 /* 164 * csio_dfs_init - Debug filesystem initialization for the module. 165 * 166 */ 167 static void 168 csio_dfs_init(void) 169 { 170 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 171 } 172 173 /* 174 * csio_dfs_exit - debugfs cleanup for the module. 175 */ 176 static void 177 csio_dfs_exit(void) 178 { 179 debugfs_remove(csio_debugfs_root); 180 } 181 182 /* 183 * csio_pci_init - PCI initialization. 184 * @pdev: PCI device. 185 * @bars: Bitmask of bars to be requested. 186 * 187 * Initializes the PCI function by enabling MMIO, setting bus 188 * mastership and setting DMA mask. 189 */ 190 static int 191 csio_pci_init(struct pci_dev *pdev, int *bars) 192 { 193 int rv = -ENODEV; 194 195 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 196 197 if (pci_enable_device_mem(pdev)) 198 goto err; 199 200 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 201 goto err_disable_device; 202 203 pci_set_master(pdev); 204 pci_try_set_mwi(pdev); 205 206 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 207 if (rv) 208 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 209 if (rv) { 210 rv = -ENODEV; 211 dev_err(&pdev->dev, "No suitable DMA available.\n"); 212 goto err_release_regions; 213 } 214 215 return 0; 216 217 err_release_regions: 218 pci_release_selected_regions(pdev, *bars); 219 err_disable_device: 220 pci_disable_device(pdev); 221 err: 222 return rv; 223 224 } 225 226 /* 227 * csio_pci_exit - PCI unitialization. 228 * @pdev: PCI device. 229 * @bars: Bars to be released. 230 * 231 */ 232 static void 233 csio_pci_exit(struct pci_dev *pdev, int *bars) 234 { 235 pci_release_selected_regions(pdev, *bars); 236 pci_disable_device(pdev); 237 } 238 239 /* 240 * csio_hw_init_workers - Initialize the HW module's worker threads. 241 * @hw: HW module. 242 * 243 */ 244 static void 245 csio_hw_init_workers(struct csio_hw *hw) 246 { 247 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 248 } 249 250 static void 251 csio_hw_exit_workers(struct csio_hw *hw) 252 { 253 cancel_work_sync(&hw->evtq_work); 254 } 255 256 static int 257 csio_create_queues(struct csio_hw *hw) 258 { 259 int i, j; 260 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 261 int rv; 262 struct csio_scsi_cpu_info *info; 263 264 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 265 return 0; 266 267 if (hw->intr_mode != CSIO_IM_MSIX) { 268 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 269 0, hw->pport[0].portid, false, NULL); 270 if (rv != 0) { 271 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 272 return rv; 273 } 274 } 275 276 /* FW event queue */ 277 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 278 csio_get_fwevt_intr_idx(hw), 279 hw->pport[0].portid, true, NULL); 280 if (rv != 0) { 281 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 282 return rv; 283 } 284 285 /* Create mgmt queue */ 286 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 287 mgmtm->iq_idx, hw->pport[0].portid, NULL); 288 289 if (rv != 0) { 290 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 291 goto err; 292 } 293 294 /* Create SCSI queues */ 295 for (i = 0; i < hw->num_pports; i++) { 296 info = &hw->scsi_cpu_info[i]; 297 298 for (j = 0; j < info->max_cpus; j++) { 299 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 300 301 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 302 sqset->intr_idx, i, false, NULL); 303 if (rv != 0) { 304 csio_err(hw, 305 "SCSI module IQ config failed [%d][%d]:%d\n", 306 i, j, rv); 307 goto err; 308 } 309 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 310 sqset->iq_idx, i, NULL); 311 if (rv != 0) { 312 csio_err(hw, 313 "SCSI module EQ config failed [%d][%d]:%d\n", 314 i, j, rv); 315 goto err; 316 } 317 } /* for all CPUs */ 318 } /* For all ports */ 319 320 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 321 return 0; 322 err: 323 csio_wr_destroy_queues(hw, true); 324 return -EINVAL; 325 } 326 327 /* 328 * csio_config_queues - Configure the DMA queues. 329 * @hw: HW module. 330 * 331 * Allocates memory for queues are registers them with FW. 332 */ 333 int 334 csio_config_queues(struct csio_hw *hw) 335 { 336 int i, j, idx, k = 0; 337 int rv; 338 struct csio_scsi_qset *sqset; 339 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 340 struct csio_scsi_qset *orig; 341 struct csio_scsi_cpu_info *info; 342 343 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 344 return csio_create_queues(hw); 345 346 /* Calculate number of SCSI queues for MSIX we would like */ 347 hw->num_scsi_msix_cpus = num_online_cpus(); 348 hw->num_sqsets = num_online_cpus() * hw->num_pports; 349 350 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 351 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 352 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 353 } 354 355 /* Initialize max_cpus, may get reduced during msix allocations */ 356 for (i = 0; i < hw->num_pports; i++) 357 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 358 359 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 360 hw->num_sqsets, hw->num_scsi_msix_cpus); 361 362 csio_intr_enable(hw); 363 364 if (hw->intr_mode != CSIO_IM_MSIX) { 365 366 /* Allocate Forward interrupt iq. */ 367 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 368 CSIO_INTR_WRSIZE, CSIO_INGRESS, 369 (void *)hw, 0, 0, NULL); 370 if (hw->intr_iq_idx == -1) { 371 csio_err(hw, 372 "Forward interrupt queue creation failed\n"); 373 goto intr_disable; 374 } 375 } 376 377 /* Allocate the FW evt queue */ 378 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 379 CSIO_FWEVT_WRSIZE, 380 CSIO_INGRESS, (void *)hw, 381 CSIO_FWEVT_FLBUFS, 0, 382 csio_fwevt_intx_handler); 383 if (hw->fwevt_iq_idx == -1) { 384 csio_err(hw, "FW evt queue creation failed\n"); 385 goto intr_disable; 386 } 387 388 /* Allocate the mgmt queue */ 389 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 390 CSIO_MGMT_EQ_WRSIZE, 391 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 392 if (mgmtm->eq_idx == -1) { 393 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 394 goto intr_disable; 395 } 396 397 /* Use FW IQ for MGMT req completion */ 398 mgmtm->iq_idx = hw->fwevt_iq_idx; 399 400 /* Allocate SCSI queues */ 401 for (i = 0; i < hw->num_pports; i++) { 402 info = &hw->scsi_cpu_info[i]; 403 404 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 405 sqset = &hw->sqset[i][j]; 406 407 if (j >= info->max_cpus) { 408 k = j % info->max_cpus; 409 orig = &hw->sqset[i][k]; 410 sqset->eq_idx = orig->eq_idx; 411 sqset->iq_idx = orig->iq_idx; 412 continue; 413 } 414 415 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 416 CSIO_EGRESS, (void *)hw, 0, 0, 417 NULL); 418 if (idx == -1) { 419 csio_err(hw, "EQ creation failed for idx:%d\n", 420 idx); 421 goto intr_disable; 422 } 423 424 sqset->eq_idx = idx; 425 426 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 427 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 428 (void *)hw, 0, 0, 429 csio_scsi_intx_handler); 430 if (idx == -1) { 431 csio_err(hw, "IQ creation failed for idx:%d\n", 432 idx); 433 goto intr_disable; 434 } 435 sqset->iq_idx = idx; 436 } /* for all CPUs */ 437 } /* For all ports */ 438 439 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 440 441 rv = csio_create_queues(hw); 442 if (rv != 0) 443 goto intr_disable; 444 445 /* 446 * Now request IRQs for the vectors. In the event of a failure, 447 * cleanup is handled internally by this function. 448 */ 449 rv = csio_request_irqs(hw); 450 if (rv != 0) 451 return -EINVAL; 452 453 return 0; 454 455 intr_disable: 456 csio_intr_disable(hw, false); 457 458 return -EINVAL; 459 } 460 461 static int 462 csio_resource_alloc(struct csio_hw *hw) 463 { 464 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 465 int rv = -ENOMEM; 466 467 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 468 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 469 470 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 471 sizeof(struct csio_mb)); 472 if (!hw->mb_mempool) 473 goto err; 474 475 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 476 sizeof(struct csio_rnode)); 477 if (!hw->rnode_mempool) 478 goto err_free_mb_mempool; 479 480 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", 481 &hw->pdev->dev, CSIO_SCSI_RSP_LEN, 482 8, 0); 483 if (!hw->scsi_dma_pool) 484 goto err_free_rn_pool; 485 486 return 0; 487 488 err_free_rn_pool: 489 mempool_destroy(hw->rnode_mempool); 490 hw->rnode_mempool = NULL; 491 err_free_mb_mempool: 492 mempool_destroy(hw->mb_mempool); 493 hw->mb_mempool = NULL; 494 err: 495 return rv; 496 } 497 498 static void 499 csio_resource_free(struct csio_hw *hw) 500 { 501 dma_pool_destroy(hw->scsi_dma_pool); 502 hw->scsi_dma_pool = NULL; 503 mempool_destroy(hw->rnode_mempool); 504 hw->rnode_mempool = NULL; 505 mempool_destroy(hw->mb_mempool); 506 hw->mb_mempool = NULL; 507 } 508 509 /* 510 * csio_hw_alloc - Allocate and initialize the HW module. 511 * @pdev: PCI device. 512 * 513 * Allocates HW structure, DMA, memory resources, maps BARS to 514 * host memory and initializes HW module. 515 */ 516 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 517 { 518 struct csio_hw *hw; 519 520 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 521 if (!hw) 522 goto err; 523 524 hw->pdev = pdev; 525 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 526 527 /* memory pool/DMA pool allocation */ 528 if (csio_resource_alloc(hw)) 529 goto err_free_hw; 530 531 /* Get the start address of registers from BAR 0 */ 532 hw->regstart = ioremap(pci_resource_start(pdev, 0), 533 pci_resource_len(pdev, 0)); 534 if (!hw->regstart) { 535 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 536 hw->regstart); 537 goto err_resource_free; 538 } 539 540 csio_hw_init_workers(hw); 541 542 if (csio_hw_init(hw)) 543 goto err_unmap_bar; 544 545 csio_dfs_create(hw); 546 547 csio_dbg(hw, "hw:%p\n", hw); 548 549 return hw; 550 551 err_unmap_bar: 552 csio_hw_exit_workers(hw); 553 iounmap(hw->regstart); 554 err_resource_free: 555 csio_resource_free(hw); 556 err_free_hw: 557 kfree(hw); 558 err: 559 return NULL; 560 } 561 562 /* 563 * csio_hw_free - Uninitialize and free the HW module. 564 * @hw: The HW module 565 * 566 * Disable interrupts, uninit the HW module, free resources, free hw. 567 */ 568 static void 569 csio_hw_free(struct csio_hw *hw) 570 { 571 csio_intr_disable(hw, true); 572 csio_hw_exit_workers(hw); 573 csio_hw_exit(hw); 574 iounmap(hw->regstart); 575 csio_dfs_destroy(hw); 576 csio_resource_free(hw); 577 kfree(hw); 578 } 579 580 /** 581 * csio_shost_init - Create and initialize the lnode module. 582 * @hw: The HW module. 583 * @dev: The device associated with this invocation. 584 * @probe: Called from probe context or not? 585 * @pln: Parent lnode if any. 586 * 587 * Allocates lnode structure via scsi_host_alloc, initializes 588 * shost, initializes lnode module and registers with SCSI ML 589 * via scsi_host_add. This function is shared between physical and 590 * virtual node ports. 591 */ 592 struct csio_lnode * 593 csio_shost_init(struct csio_hw *hw, struct device *dev, 594 bool probe, struct csio_lnode *pln) 595 { 596 struct Scsi_Host *shost = NULL; 597 struct csio_lnode *ln; 598 599 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 600 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 601 602 /* 603 * hw->pdev is the physical port's PCI dev structure, 604 * which will be different from the NPIV dev structure. 605 */ 606 if (dev == &hw->pdev->dev) 607 shost = scsi_host_alloc( 608 &csio_fcoe_shost_template, 609 sizeof(struct csio_lnode)); 610 else 611 shost = scsi_host_alloc( 612 &csio_fcoe_shost_vport_template, 613 sizeof(struct csio_lnode)); 614 615 if (!shost) 616 goto err; 617 618 ln = shost_priv(shost); 619 memset(ln, 0, sizeof(struct csio_lnode)); 620 621 /* Link common lnode to this lnode */ 622 ln->dev_num = (shost->host_no << 16); 623 624 shost->can_queue = CSIO_MAX_QUEUE; 625 shost->this_id = -1; 626 shost->unique_id = shost->host_no; 627 shost->max_cmd_len = 16; /* Max CDB length supported */ 628 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 629 hw->fres_info.max_ssns); 630 shost->max_lun = CSIO_MAX_LUN; 631 if (dev == &hw->pdev->dev) 632 shost->transportt = csio_fcoe_transport; 633 else 634 shost->transportt = csio_fcoe_transport_vport; 635 636 /* root lnode */ 637 if (!hw->rln) 638 hw->rln = ln; 639 640 /* Other initialization here: Common, Transport specific */ 641 if (csio_lnode_init(ln, hw, pln)) 642 goto err_shost_put; 643 644 if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev)) 645 goto err_lnode_exit; 646 647 return ln; 648 649 err_lnode_exit: 650 csio_lnode_exit(ln); 651 err_shost_put: 652 scsi_host_put(shost); 653 err: 654 return NULL; 655 } 656 657 /** 658 * csio_shost_exit - De-instantiate the shost. 659 * @ln: The lnode module corresponding to the shost. 660 * 661 */ 662 void 663 csio_shost_exit(struct csio_lnode *ln) 664 { 665 struct Scsi_Host *shost = csio_ln_to_shost(ln); 666 struct csio_hw *hw = csio_lnode_to_hw(ln); 667 668 /* Inform transport */ 669 fc_remove_host(shost); 670 671 /* Inform SCSI ML */ 672 scsi_remove_host(shost); 673 674 /* Flush all the events, so that any rnode removal events 675 * already queued are all handled, before we remove the lnode. 676 */ 677 spin_lock_irq(&hw->lock); 678 csio_evtq_flush(hw); 679 spin_unlock_irq(&hw->lock); 680 681 csio_lnode_exit(ln); 682 scsi_host_put(shost); 683 } 684 685 struct csio_lnode * 686 csio_lnode_alloc(struct csio_hw *hw) 687 { 688 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 689 } 690 691 void 692 csio_lnodes_block_request(struct csio_hw *hw) 693 { 694 struct Scsi_Host *shost; 695 struct csio_lnode *sln; 696 struct csio_lnode *ln; 697 struct list_head *cur_ln, *cur_cln; 698 struct csio_lnode **lnode_list; 699 int cur_cnt = 0, ii; 700 701 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 702 GFP_KERNEL); 703 if (!lnode_list) { 704 csio_err(hw, "Failed to allocate lnodes_list"); 705 return; 706 } 707 708 spin_lock_irq(&hw->lock); 709 /* Traverse sibling lnodes */ 710 list_for_each(cur_ln, &hw->sln_head) { 711 sln = (struct csio_lnode *) cur_ln; 712 lnode_list[cur_cnt++] = sln; 713 714 /* Traverse children lnodes */ 715 list_for_each(cur_cln, &sln->cln_head) 716 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 717 } 718 spin_unlock_irq(&hw->lock); 719 720 for (ii = 0; ii < cur_cnt; ii++) { 721 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 722 ln = lnode_list[ii]; 723 shost = csio_ln_to_shost(ln); 724 scsi_block_requests(shost); 725 726 } 727 kfree(lnode_list); 728 } 729 730 void 731 csio_lnodes_unblock_request(struct csio_hw *hw) 732 { 733 struct csio_lnode *ln; 734 struct Scsi_Host *shost; 735 struct csio_lnode *sln; 736 struct list_head *cur_ln, *cur_cln; 737 struct csio_lnode **lnode_list; 738 int cur_cnt = 0, ii; 739 740 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 741 GFP_KERNEL); 742 if (!lnode_list) { 743 csio_err(hw, "Failed to allocate lnodes_list"); 744 return; 745 } 746 747 spin_lock_irq(&hw->lock); 748 /* Traverse sibling lnodes */ 749 list_for_each(cur_ln, &hw->sln_head) { 750 sln = (struct csio_lnode *) cur_ln; 751 lnode_list[cur_cnt++] = sln; 752 753 /* Traverse children lnodes */ 754 list_for_each(cur_cln, &sln->cln_head) 755 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 756 } 757 spin_unlock_irq(&hw->lock); 758 759 for (ii = 0; ii < cur_cnt; ii++) { 760 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 761 ln = lnode_list[ii]; 762 shost = csio_ln_to_shost(ln); 763 scsi_unblock_requests(shost); 764 } 765 kfree(lnode_list); 766 } 767 768 void 769 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 770 { 771 struct csio_lnode *ln; 772 struct Scsi_Host *shost; 773 struct csio_lnode *sln; 774 struct list_head *cur_ln, *cur_cln; 775 struct csio_lnode **lnode_list; 776 int cur_cnt = 0, ii; 777 778 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 779 GFP_KERNEL); 780 if (!lnode_list) { 781 csio_err(hw, "Failed to allocate lnodes_list"); 782 return; 783 } 784 785 spin_lock_irq(&hw->lock); 786 /* Traverse sibling lnodes */ 787 list_for_each(cur_ln, &hw->sln_head) { 788 sln = (struct csio_lnode *) cur_ln; 789 if (sln->portid != portid) 790 continue; 791 792 lnode_list[cur_cnt++] = sln; 793 794 /* Traverse children lnodes */ 795 list_for_each(cur_cln, &sln->cln_head) 796 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 797 } 798 spin_unlock_irq(&hw->lock); 799 800 for (ii = 0; ii < cur_cnt; ii++) { 801 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 802 ln = lnode_list[ii]; 803 shost = csio_ln_to_shost(ln); 804 scsi_block_requests(shost); 805 } 806 kfree(lnode_list); 807 } 808 809 void 810 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 811 { 812 struct csio_lnode *ln; 813 struct Scsi_Host *shost; 814 struct csio_lnode *sln; 815 struct list_head *cur_ln, *cur_cln; 816 struct csio_lnode **lnode_list; 817 int cur_cnt = 0, ii; 818 819 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 820 GFP_KERNEL); 821 if (!lnode_list) { 822 csio_err(hw, "Failed to allocate lnodes_list"); 823 return; 824 } 825 826 spin_lock_irq(&hw->lock); 827 /* Traverse sibling lnodes */ 828 list_for_each(cur_ln, &hw->sln_head) { 829 sln = (struct csio_lnode *) cur_ln; 830 if (sln->portid != portid) 831 continue; 832 lnode_list[cur_cnt++] = sln; 833 834 /* Traverse children lnodes */ 835 list_for_each(cur_cln, &sln->cln_head) 836 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 837 } 838 spin_unlock_irq(&hw->lock); 839 840 for (ii = 0; ii < cur_cnt; ii++) { 841 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 842 ln = lnode_list[ii]; 843 shost = csio_ln_to_shost(ln); 844 scsi_unblock_requests(shost); 845 } 846 kfree(lnode_list); 847 } 848 849 void 850 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 851 { 852 struct csio_lnode *sln; 853 struct csio_lnode *ln; 854 struct list_head *cur_ln, *cur_cln; 855 struct csio_lnode **lnode_list; 856 int cur_cnt = 0, ii; 857 858 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 859 GFP_KERNEL); 860 if (!lnode_list) { 861 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 862 return; 863 } 864 865 /* Get all child lnodes(NPIV ports) */ 866 spin_lock_irq(&hw->lock); 867 list_for_each(cur_ln, &hw->sln_head) { 868 sln = (struct csio_lnode *) cur_ln; 869 870 /* Traverse children lnodes */ 871 list_for_each(cur_cln, &sln->cln_head) 872 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 873 } 874 spin_unlock_irq(&hw->lock); 875 876 /* Delete NPIV lnodes */ 877 for (ii = 0; ii < cur_cnt; ii++) { 878 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 879 ln = lnode_list[ii]; 880 fc_vport_terminate(ln->fc_vport); 881 } 882 883 /* Delete only npiv lnodes */ 884 if (npiv) 885 goto free_lnodes; 886 887 cur_cnt = 0; 888 /* Get all physical lnodes */ 889 spin_lock_irq(&hw->lock); 890 /* Traverse sibling lnodes */ 891 list_for_each(cur_ln, &hw->sln_head) { 892 sln = (struct csio_lnode *) cur_ln; 893 lnode_list[cur_cnt++] = sln; 894 } 895 spin_unlock_irq(&hw->lock); 896 897 /* Delete physical lnodes */ 898 for (ii = 0; ii < cur_cnt; ii++) { 899 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 900 csio_shost_exit(lnode_list[ii]); 901 } 902 903 free_lnodes: 904 kfree(lnode_list); 905 } 906 907 /* 908 * csio_lnode_init_post: Set lnode attributes after starting HW. 909 * @ln: lnode. 910 * 911 */ 912 static void 913 csio_lnode_init_post(struct csio_lnode *ln) 914 { 915 struct Scsi_Host *shost = csio_ln_to_shost(ln); 916 917 csio_fchost_attr_init(ln); 918 919 scsi_scan_host(shost); 920 } 921 922 /* 923 * csio_probe_one - Instantiate this function. 924 * @pdev: PCI device 925 * @id: Device ID 926 * 927 * This is the .probe() callback of the driver. This function: 928 * - Initializes the PCI function by enabling MMIO, setting bus 929 * mastership and setting DMA mask. 930 * - Allocates HW structure, DMA, memory resources, maps BARS to 931 * host memory and initializes HW module. 932 * - Allocates lnode structure via scsi_host_alloc, initializes 933 * shost, initialized lnode module and registers with SCSI ML 934 * via scsi_host_add. 935 * - Enables interrupts, and starts the chip by kicking off the 936 * HW state machine. 937 * - Once hardware is ready, initiated scan of the host via 938 * scsi_scan_host. 939 */ 940 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 941 { 942 int rv; 943 int bars; 944 int i; 945 struct csio_hw *hw; 946 struct csio_lnode *ln; 947 948 /* probe only T5 and T6 cards */ 949 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && 950 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) 951 return -ENODEV; 952 953 rv = csio_pci_init(pdev, &bars); 954 if (rv) 955 goto err; 956 957 hw = csio_hw_alloc(pdev); 958 if (!hw) { 959 rv = -ENODEV; 960 goto err_pci_exit; 961 } 962 963 if (!pcie_relaxed_ordering_enabled(pdev)) 964 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; 965 966 pci_set_drvdata(pdev, hw); 967 968 rv = csio_hw_start(hw); 969 if (rv) { 970 if (rv == -EINVAL) { 971 dev_err(&pdev->dev, 972 "Failed to start FW, continuing in debug mode.\n"); 973 return 0; 974 } 975 goto err_lnode_exit; 976 } 977 978 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 979 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 980 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 981 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 982 FW_HDR_FW_VER_BUILD_G(hw->fwrev)); 983 984 for (i = 0; i < hw->num_pports; i++) { 985 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 986 if (!ln) { 987 rv = -ENODEV; 988 break; 989 } 990 /* Initialize portid */ 991 ln->portid = hw->pport[i].portid; 992 993 spin_lock_irq(&hw->lock); 994 if (csio_lnode_start(ln) != 0) 995 rv = -ENODEV; 996 spin_unlock_irq(&hw->lock); 997 998 if (rv) 999 break; 1000 1001 csio_lnode_init_post(ln); 1002 } 1003 1004 if (rv) 1005 goto err_lnode_exit; 1006 1007 return 0; 1008 1009 err_lnode_exit: 1010 csio_lnodes_block_request(hw); 1011 spin_lock_irq(&hw->lock); 1012 csio_hw_stop(hw); 1013 spin_unlock_irq(&hw->lock); 1014 csio_lnodes_unblock_request(hw); 1015 csio_lnodes_exit(hw, 0); 1016 csio_hw_free(hw); 1017 err_pci_exit: 1018 csio_pci_exit(pdev, &bars); 1019 err: 1020 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1021 return rv; 1022 } 1023 1024 /* 1025 * csio_remove_one - Remove one instance of the driver at this PCI function. 1026 * @pdev: PCI device 1027 * 1028 * Used during hotplug operation. 1029 */ 1030 static void csio_remove_one(struct pci_dev *pdev) 1031 { 1032 struct csio_hw *hw = pci_get_drvdata(pdev); 1033 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1034 1035 csio_lnodes_block_request(hw); 1036 spin_lock_irq(&hw->lock); 1037 1038 /* Stops lnode, Rnode s/m 1039 * Quiesce IOs. 1040 * All sessions with remote ports are unregistered. 1041 */ 1042 csio_hw_stop(hw); 1043 spin_unlock_irq(&hw->lock); 1044 csio_lnodes_unblock_request(hw); 1045 1046 csio_lnodes_exit(hw, 0); 1047 csio_hw_free(hw); 1048 csio_pci_exit(pdev, &bars); 1049 } 1050 1051 /* 1052 * csio_pci_error_detected - PCI error was detected 1053 * @pdev: PCI device 1054 * 1055 */ 1056 static pci_ers_result_t 1057 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1058 { 1059 struct csio_hw *hw = pci_get_drvdata(pdev); 1060 1061 csio_lnodes_block_request(hw); 1062 spin_lock_irq(&hw->lock); 1063 1064 /* Post PCI error detected evt to HW s/m 1065 * HW s/m handles this evt by quiescing IOs, unregisters rports 1066 * and finally takes the device to offline. 1067 */ 1068 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1069 spin_unlock_irq(&hw->lock); 1070 csio_lnodes_unblock_request(hw); 1071 csio_lnodes_exit(hw, 0); 1072 csio_intr_disable(hw, true); 1073 pci_disable_device(pdev); 1074 return state == pci_channel_io_perm_failure ? 1075 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1076 } 1077 1078 /* 1079 * csio_pci_slot_reset - PCI slot has been reset. 1080 * @pdev: PCI device 1081 * 1082 */ 1083 static pci_ers_result_t 1084 csio_pci_slot_reset(struct pci_dev *pdev) 1085 { 1086 struct csio_hw *hw = pci_get_drvdata(pdev); 1087 int ready; 1088 1089 if (pci_enable_device(pdev)) { 1090 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1091 return PCI_ERS_RESULT_DISCONNECT; 1092 } 1093 1094 pci_set_master(pdev); 1095 pci_restore_state(pdev); 1096 pci_save_state(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("Dual BSD/GPL"); 1253 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1254 MODULE_VERSION(CSIO_DRV_VERSION); 1255 MODULE_FIRMWARE(FW_FNAME_T5); 1256 MODULE_FIRMWARE(FW_FNAME_T6); 1257