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/mm.h> 42 #include <linux/notifier.h> 43 #include <linux/kdebug.h> 44 #include <linux/seq_file.h> 45 #include <linux/debugfs.h> 46 #include <linux/string.h> 47 #include <linux/export.h> 48 49 #include "csio_init.h" 50 #include "csio_defs.h" 51 52 #define CSIO_MIN_MEMPOOL_SZ 64 53 54 static struct dentry *csio_debugfs_root; 55 56 static struct scsi_transport_template *csio_fcoe_transport; 57 static struct scsi_transport_template *csio_fcoe_transport_vport; 58 59 /* 60 * debugfs support 61 */ 62 static ssize_t 63 csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) 64 { 65 loff_t pos = *ppos; 66 loff_t avail = file_inode(file)->i_size; 67 unsigned int mem = (uintptr_t)file->private_data & 3; 68 struct csio_hw *hw = file->private_data - mem; 69 70 if (pos < 0) 71 return -EINVAL; 72 if (pos >= avail) 73 return 0; 74 if (count > avail - pos) 75 count = avail - pos; 76 77 while (count) { 78 size_t len; 79 int ret, ofst; 80 __be32 data[16]; 81 82 if (mem == MEM_MC) 83 ret = hw->chip_ops->chip_mc_read(hw, 0, pos, 84 data, NULL); 85 else 86 ret = hw->chip_ops->chip_edc_read(hw, mem, pos, 87 data, NULL); 88 if (ret) 89 return ret; 90 91 ofst = pos % sizeof(data); 92 len = min(count, sizeof(data) - ofst); 93 if (copy_to_user(buf, (u8 *)data + ofst, len)) 94 return -EFAULT; 95 96 buf += len; 97 pos += len; 98 count -= len; 99 } 100 count = pos - *ppos; 101 *ppos = pos; 102 return count; 103 } 104 105 static const struct file_operations csio_mem_debugfs_fops = { 106 .owner = THIS_MODULE, 107 .open = simple_open, 108 .read = csio_mem_read, 109 .llseek = default_llseek, 110 }; 111 112 void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, 113 unsigned int idx, unsigned int size_mb) 114 { 115 debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root, 116 (void *)hw + idx, &csio_mem_debugfs_fops, 117 size_mb << 20); 118 } 119 120 static int csio_setup_debugfs(struct csio_hw *hw) 121 { 122 int i; 123 124 if (IS_ERR_OR_NULL(hw->debugfs_root)) 125 return -1; 126 127 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A); 128 if (i & EDRAM0_ENABLE_F) 129 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); 130 if (i & EDRAM1_ENABLE_F) 131 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); 132 133 hw->chip_ops->chip_dfs_create_ext_mem(hw); 134 return 0; 135 } 136 137 /* 138 * csio_dfs_create - Creates and sets up per-hw debugfs. 139 * 140 */ 141 static int 142 csio_dfs_create(struct csio_hw *hw) 143 { 144 if (csio_debugfs_root) { 145 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), 146 csio_debugfs_root); 147 csio_setup_debugfs(hw); 148 } 149 150 return 0; 151 } 152 153 /* 154 * csio_dfs_destroy - Destroys per-hw debugfs. 155 */ 156 static void 157 csio_dfs_destroy(struct csio_hw *hw) 158 { 159 debugfs_remove_recursive(hw->debugfs_root); 160 } 161 162 /* 163 * csio_dfs_init - Debug filesystem initialization for the module. 164 * 165 */ 166 static void 167 csio_dfs_init(void) 168 { 169 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 170 } 171 172 /* 173 * csio_dfs_exit - debugfs cleanup for the module. 174 */ 175 static void 176 csio_dfs_exit(void) 177 { 178 debugfs_remove(csio_debugfs_root); 179 } 180 181 /* 182 * csio_pci_init - PCI initialization. 183 * @pdev: PCI device. 184 * @bars: Bitmask of bars to be requested. 185 * 186 * Initializes the PCI function by enabling MMIO, setting bus 187 * mastership and setting DMA mask. 188 */ 189 static int 190 csio_pci_init(struct pci_dev *pdev, int *bars) 191 { 192 int rv = -ENODEV; 193 194 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 195 196 if (pci_enable_device_mem(pdev)) 197 goto err; 198 199 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 200 goto err_disable_device; 201 202 pci_set_master(pdev); 203 pci_try_set_mwi(pdev); 204 205 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 206 if (rv) 207 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 208 if (rv) { 209 rv = -ENODEV; 210 dev_err(&pdev->dev, "No suitable DMA available.\n"); 211 goto err_release_regions; 212 } 213 214 return 0; 215 216 err_release_regions: 217 pci_release_selected_regions(pdev, *bars); 218 err_disable_device: 219 pci_disable_device(pdev); 220 err: 221 return rv; 222 223 } 224 225 /* 226 * csio_pci_exit - PCI unitialization. 227 * @pdev: PCI device. 228 * @bars: Bars to be released. 229 * 230 */ 231 static void 232 csio_pci_exit(struct pci_dev *pdev, int *bars) 233 { 234 pci_release_selected_regions(pdev, *bars); 235 pci_disable_device(pdev); 236 } 237 238 /* 239 * csio_hw_init_workers - Initialize the HW module's worker threads. 240 * @hw: HW module. 241 * 242 */ 243 static void 244 csio_hw_init_workers(struct csio_hw *hw) 245 { 246 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 247 } 248 249 static void 250 csio_hw_exit_workers(struct csio_hw *hw) 251 { 252 cancel_work_sync(&hw->evtq_work); 253 } 254 255 static int 256 csio_create_queues(struct csio_hw *hw) 257 { 258 int i, j; 259 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 260 int rv; 261 struct csio_scsi_cpu_info *info; 262 263 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 264 return 0; 265 266 if (hw->intr_mode != CSIO_IM_MSIX) { 267 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 268 0, hw->pport[0].portid, false, NULL); 269 if (rv != 0) { 270 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 271 return rv; 272 } 273 } 274 275 /* FW event queue */ 276 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 277 csio_get_fwevt_intr_idx(hw), 278 hw->pport[0].portid, true, NULL); 279 if (rv != 0) { 280 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 281 return rv; 282 } 283 284 /* Create mgmt queue */ 285 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 286 mgmtm->iq_idx, hw->pport[0].portid, NULL); 287 288 if (rv != 0) { 289 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 290 goto err; 291 } 292 293 /* Create SCSI queues */ 294 for (i = 0; i < hw->num_pports; i++) { 295 info = &hw->scsi_cpu_info[i]; 296 297 for (j = 0; j < info->max_cpus; j++) { 298 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 299 300 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 301 sqset->intr_idx, i, false, NULL); 302 if (rv != 0) { 303 csio_err(hw, 304 "SCSI module IQ config failed [%d][%d]:%d\n", 305 i, j, rv); 306 goto err; 307 } 308 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 309 sqset->iq_idx, i, NULL); 310 if (rv != 0) { 311 csio_err(hw, 312 "SCSI module EQ config failed [%d][%d]:%d\n", 313 i, j, rv); 314 goto err; 315 } 316 } /* for all CPUs */ 317 } /* For all ports */ 318 319 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 320 return 0; 321 err: 322 csio_wr_destroy_queues(hw, true); 323 return -EINVAL; 324 } 325 326 /* 327 * csio_config_queues - Configure the DMA queues. 328 * @hw: HW module. 329 * 330 * Allocates memory for queues are registers them with FW. 331 */ 332 int 333 csio_config_queues(struct csio_hw *hw) 334 { 335 int i, j, idx, k = 0; 336 int rv; 337 struct csio_scsi_qset *sqset; 338 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 339 struct csio_scsi_qset *orig; 340 struct csio_scsi_cpu_info *info; 341 342 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 343 return csio_create_queues(hw); 344 345 /* Calculate number of SCSI queues for MSIX we would like */ 346 hw->num_scsi_msix_cpus = num_online_cpus(); 347 hw->num_sqsets = num_online_cpus() * hw->num_pports; 348 349 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 350 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 351 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 352 } 353 354 /* Initialize max_cpus, may get reduced during msix allocations */ 355 for (i = 0; i < hw->num_pports; i++) 356 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 357 358 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 359 hw->num_sqsets, hw->num_scsi_msix_cpus); 360 361 csio_intr_enable(hw); 362 363 if (hw->intr_mode != CSIO_IM_MSIX) { 364 365 /* Allocate Forward interrupt iq. */ 366 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 367 CSIO_INTR_WRSIZE, CSIO_INGRESS, 368 (void *)hw, 0, 0, NULL); 369 if (hw->intr_iq_idx == -1) { 370 csio_err(hw, 371 "Forward interrupt queue creation failed\n"); 372 goto intr_disable; 373 } 374 } 375 376 /* Allocate the FW evt queue */ 377 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 378 CSIO_FWEVT_WRSIZE, 379 CSIO_INGRESS, (void *)hw, 380 CSIO_FWEVT_FLBUFS, 0, 381 csio_fwevt_intx_handler); 382 if (hw->fwevt_iq_idx == -1) { 383 csio_err(hw, "FW evt queue creation failed\n"); 384 goto intr_disable; 385 } 386 387 /* Allocate the mgmt queue */ 388 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 389 CSIO_MGMT_EQ_WRSIZE, 390 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 391 if (mgmtm->eq_idx == -1) { 392 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 393 goto intr_disable; 394 } 395 396 /* Use FW IQ for MGMT req completion */ 397 mgmtm->iq_idx = hw->fwevt_iq_idx; 398 399 /* Allocate SCSI queues */ 400 for (i = 0; i < hw->num_pports; i++) { 401 info = &hw->scsi_cpu_info[i]; 402 403 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 404 sqset = &hw->sqset[i][j]; 405 406 if (j >= info->max_cpus) { 407 k = j % info->max_cpus; 408 orig = &hw->sqset[i][k]; 409 sqset->eq_idx = orig->eq_idx; 410 sqset->iq_idx = orig->iq_idx; 411 continue; 412 } 413 414 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 415 CSIO_EGRESS, (void *)hw, 0, 0, 416 NULL); 417 if (idx == -1) { 418 csio_err(hw, "EQ creation failed for idx:%d\n", 419 idx); 420 goto intr_disable; 421 } 422 423 sqset->eq_idx = idx; 424 425 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 426 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 427 (void *)hw, 0, 0, 428 csio_scsi_intx_handler); 429 if (idx == -1) { 430 csio_err(hw, "IQ creation failed for idx:%d\n", 431 idx); 432 goto intr_disable; 433 } 434 sqset->iq_idx = idx; 435 } /* for all CPUs */ 436 } /* For all ports */ 437 438 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 439 440 rv = csio_create_queues(hw); 441 if (rv != 0) 442 goto intr_disable; 443 444 /* 445 * Now request IRQs for the vectors. In the event of a failure, 446 * cleanup is handled internally by this function. 447 */ 448 rv = csio_request_irqs(hw); 449 if (rv != 0) 450 return -EINVAL; 451 452 return 0; 453 454 intr_disable: 455 csio_intr_disable(hw, false); 456 457 return -EINVAL; 458 } 459 460 static int 461 csio_resource_alloc(struct csio_hw *hw) 462 { 463 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 464 int rv = -ENOMEM; 465 466 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 467 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 468 469 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 470 sizeof(struct csio_mb)); 471 if (!hw->mb_mempool) 472 goto err; 473 474 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 475 sizeof(struct csio_rnode)); 476 if (!hw->rnode_mempool) 477 goto err_free_mb_mempool; 478 479 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", 480 &hw->pdev->dev, CSIO_SCSI_RSP_LEN, 481 8, 0); 482 if (!hw->scsi_dma_pool) 483 goto err_free_rn_pool; 484 485 return 0; 486 487 err_free_rn_pool: 488 mempool_destroy(hw->rnode_mempool); 489 hw->rnode_mempool = NULL; 490 err_free_mb_mempool: 491 mempool_destroy(hw->mb_mempool); 492 hw->mb_mempool = NULL; 493 err: 494 return rv; 495 } 496 497 static void 498 csio_resource_free(struct csio_hw *hw) 499 { 500 dma_pool_destroy(hw->scsi_dma_pool); 501 hw->scsi_dma_pool = NULL; 502 mempool_destroy(hw->rnode_mempool); 503 hw->rnode_mempool = NULL; 504 mempool_destroy(hw->mb_mempool); 505 hw->mb_mempool = NULL; 506 } 507 508 /* 509 * csio_hw_alloc - Allocate and initialize the HW module. 510 * @pdev: PCI device. 511 * 512 * Allocates HW structure, DMA, memory resources, maps BARS to 513 * host memory and initializes HW module. 514 */ 515 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 516 { 517 struct csio_hw *hw; 518 519 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 520 if (!hw) 521 goto err; 522 523 hw->pdev = pdev; 524 strscpy(hw->drv_version, CSIO_DRV_VERSION, 525 sizeof(hw->drv_version)); 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 MODULE_SOFTDEP("pre: cxgb4"); 1258