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 void 171 csio_dfs_init(void) 172 { 173 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); 174 } 175 176 /* 177 * csio_dfs_exit - debugfs cleanup for the module. 178 */ 179 static void 180 csio_dfs_exit(void) 181 { 182 debugfs_remove(csio_debugfs_root); 183 } 184 185 /* 186 * csio_pci_init - PCI initialization. 187 * @pdev: PCI device. 188 * @bars: Bitmask of bars to be requested. 189 * 190 * Initializes the PCI function by enabling MMIO, setting bus 191 * mastership and setting DMA mask. 192 */ 193 static int 194 csio_pci_init(struct pci_dev *pdev, int *bars) 195 { 196 int rv = -ENODEV; 197 198 *bars = pci_select_bars(pdev, IORESOURCE_MEM); 199 200 if (pci_enable_device_mem(pdev)) 201 goto err; 202 203 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) 204 goto err_disable_device; 205 206 pci_set_master(pdev); 207 pci_try_set_mwi(pdev); 208 209 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 210 if (rv) 211 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 212 if (rv) { 213 rv = -ENODEV; 214 dev_err(&pdev->dev, "No suitable DMA available.\n"); 215 goto err_release_regions; 216 } 217 218 return 0; 219 220 err_release_regions: 221 pci_release_selected_regions(pdev, *bars); 222 err_disable_device: 223 pci_disable_device(pdev); 224 err: 225 return rv; 226 227 } 228 229 /* 230 * csio_pci_exit - PCI unitialization. 231 * @pdev: PCI device. 232 * @bars: Bars to be released. 233 * 234 */ 235 static void 236 csio_pci_exit(struct pci_dev *pdev, int *bars) 237 { 238 pci_release_selected_regions(pdev, *bars); 239 pci_disable_device(pdev); 240 } 241 242 /* 243 * csio_hw_init_workers - Initialize the HW module's worker threads. 244 * @hw: HW module. 245 * 246 */ 247 static void 248 csio_hw_init_workers(struct csio_hw *hw) 249 { 250 INIT_WORK(&hw->evtq_work, csio_evtq_worker); 251 } 252 253 static void 254 csio_hw_exit_workers(struct csio_hw *hw) 255 { 256 cancel_work_sync(&hw->evtq_work); 257 } 258 259 static int 260 csio_create_queues(struct csio_hw *hw) 261 { 262 int i, j; 263 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 264 int rv; 265 struct csio_scsi_cpu_info *info; 266 267 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) 268 return 0; 269 270 if (hw->intr_mode != CSIO_IM_MSIX) { 271 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 272 0, hw->pport[0].portid, false, NULL); 273 if (rv != 0) { 274 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); 275 return rv; 276 } 277 } 278 279 /* FW event queue */ 280 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, 281 csio_get_fwevt_intr_idx(hw), 282 hw->pport[0].portid, true, NULL); 283 if (rv != 0) { 284 csio_err(hw, "FW event IQ config failed!: %d\n", rv); 285 return rv; 286 } 287 288 /* Create mgmt queue */ 289 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, 290 mgmtm->iq_idx, hw->pport[0].portid, NULL); 291 292 if (rv != 0) { 293 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); 294 goto err; 295 } 296 297 /* Create SCSI queues */ 298 for (i = 0; i < hw->num_pports; i++) { 299 info = &hw->scsi_cpu_info[i]; 300 301 for (j = 0; j < info->max_cpus; j++) { 302 struct csio_scsi_qset *sqset = &hw->sqset[i][j]; 303 304 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, 305 sqset->intr_idx, i, false, NULL); 306 if (rv != 0) { 307 csio_err(hw, 308 "SCSI module IQ config failed [%d][%d]:%d\n", 309 i, j, rv); 310 goto err; 311 } 312 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, 313 sqset->iq_idx, i, NULL); 314 if (rv != 0) { 315 csio_err(hw, 316 "SCSI module EQ config failed [%d][%d]:%d\n", 317 i, j, rv); 318 goto err; 319 } 320 } /* for all CPUs */ 321 } /* For all ports */ 322 323 hw->flags |= CSIO_HWF_Q_FW_ALLOCED; 324 return 0; 325 err: 326 csio_wr_destroy_queues(hw, true); 327 return -EINVAL; 328 } 329 330 /* 331 * csio_config_queues - Configure the DMA queues. 332 * @hw: HW module. 333 * 334 * Allocates memory for queues are registers them with FW. 335 */ 336 int 337 csio_config_queues(struct csio_hw *hw) 338 { 339 int i, j, idx, k = 0; 340 int rv; 341 struct csio_scsi_qset *sqset; 342 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); 343 struct csio_scsi_qset *orig; 344 struct csio_scsi_cpu_info *info; 345 346 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) 347 return csio_create_queues(hw); 348 349 /* Calculate number of SCSI queues for MSIX we would like */ 350 hw->num_scsi_msix_cpus = num_online_cpus(); 351 hw->num_sqsets = num_online_cpus() * hw->num_pports; 352 353 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { 354 hw->num_sqsets = CSIO_MAX_SCSI_QSETS; 355 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; 356 } 357 358 /* Initialize max_cpus, may get reduced during msix allocations */ 359 for (i = 0; i < hw->num_pports; i++) 360 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; 361 362 csio_dbg(hw, "nsqsets:%d scpus:%d\n", 363 hw->num_sqsets, hw->num_scsi_msix_cpus); 364 365 csio_intr_enable(hw); 366 367 if (hw->intr_mode != CSIO_IM_MSIX) { 368 369 /* Allocate Forward interrupt iq. */ 370 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, 371 CSIO_INTR_WRSIZE, CSIO_INGRESS, 372 (void *)hw, 0, 0, NULL); 373 if (hw->intr_iq_idx == -1) { 374 csio_err(hw, 375 "Forward interrupt queue creation failed\n"); 376 goto intr_disable; 377 } 378 } 379 380 /* Allocate the FW evt queue */ 381 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, 382 CSIO_FWEVT_WRSIZE, 383 CSIO_INGRESS, (void *)hw, 384 CSIO_FWEVT_FLBUFS, 0, 385 csio_fwevt_intx_handler); 386 if (hw->fwevt_iq_idx == -1) { 387 csio_err(hw, "FW evt queue creation failed\n"); 388 goto intr_disable; 389 } 390 391 /* Allocate the mgmt queue */ 392 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, 393 CSIO_MGMT_EQ_WRSIZE, 394 CSIO_EGRESS, (void *)hw, 0, 0, NULL); 395 if (mgmtm->eq_idx == -1) { 396 csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); 397 goto intr_disable; 398 } 399 400 /* Use FW IQ for MGMT req completion */ 401 mgmtm->iq_idx = hw->fwevt_iq_idx; 402 403 /* Allocate SCSI queues */ 404 for (i = 0; i < hw->num_pports; i++) { 405 info = &hw->scsi_cpu_info[i]; 406 407 for (j = 0; j < hw->num_scsi_msix_cpus; j++) { 408 sqset = &hw->sqset[i][j]; 409 410 if (j >= info->max_cpus) { 411 k = j % info->max_cpus; 412 orig = &hw->sqset[i][k]; 413 sqset->eq_idx = orig->eq_idx; 414 sqset->iq_idx = orig->iq_idx; 415 continue; 416 } 417 418 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, 419 CSIO_EGRESS, (void *)hw, 0, 0, 420 NULL); 421 if (idx == -1) { 422 csio_err(hw, "EQ creation failed for idx:%d\n", 423 idx); 424 goto intr_disable; 425 } 426 427 sqset->eq_idx = idx; 428 429 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, 430 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, 431 (void *)hw, 0, 0, 432 csio_scsi_intx_handler); 433 if (idx == -1) { 434 csio_err(hw, "IQ creation failed for idx:%d\n", 435 idx); 436 goto intr_disable; 437 } 438 sqset->iq_idx = idx; 439 } /* for all CPUs */ 440 } /* For all ports */ 441 442 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; 443 444 rv = csio_create_queues(hw); 445 if (rv != 0) 446 goto intr_disable; 447 448 /* 449 * Now request IRQs for the vectors. In the event of a failure, 450 * cleanup is handled internally by this function. 451 */ 452 rv = csio_request_irqs(hw); 453 if (rv != 0) 454 return -EINVAL; 455 456 return 0; 457 458 intr_disable: 459 csio_intr_disable(hw, false); 460 461 return -EINVAL; 462 } 463 464 static int 465 csio_resource_alloc(struct csio_hw *hw) 466 { 467 struct csio_wrm *wrm = csio_hw_to_wrm(hw); 468 int rv = -ENOMEM; 469 470 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + 471 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); 472 473 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 474 sizeof(struct csio_mb)); 475 if (!hw->mb_mempool) 476 goto err; 477 478 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, 479 sizeof(struct csio_rnode)); 480 if (!hw->rnode_mempool) 481 goto err_free_mb_mempool; 482 483 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", 484 &hw->pdev->dev, CSIO_SCSI_RSP_LEN, 485 8, 0); 486 if (!hw->scsi_dma_pool) 487 goto err_free_rn_pool; 488 489 return 0; 490 491 err_free_rn_pool: 492 mempool_destroy(hw->rnode_mempool); 493 hw->rnode_mempool = NULL; 494 err_free_mb_mempool: 495 mempool_destroy(hw->mb_mempool); 496 hw->mb_mempool = NULL; 497 err: 498 return rv; 499 } 500 501 static void 502 csio_resource_free(struct csio_hw *hw) 503 { 504 dma_pool_destroy(hw->scsi_dma_pool); 505 hw->scsi_dma_pool = NULL; 506 mempool_destroy(hw->rnode_mempool); 507 hw->rnode_mempool = NULL; 508 mempool_destroy(hw->mb_mempool); 509 hw->mb_mempool = NULL; 510 } 511 512 /* 513 * csio_hw_alloc - Allocate and initialize the HW module. 514 * @pdev: PCI device. 515 * 516 * Allocates HW structure, DMA, memory resources, maps BARS to 517 * host memory and initializes HW module. 518 */ 519 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) 520 { 521 struct csio_hw *hw; 522 523 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); 524 if (!hw) 525 goto err; 526 527 hw->pdev = pdev; 528 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 529 530 /* memory pool/DMA pool allocation */ 531 if (csio_resource_alloc(hw)) 532 goto err_free_hw; 533 534 /* Get the start address of registers from BAR 0 */ 535 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), 536 pci_resource_len(pdev, 0)); 537 if (!hw->regstart) { 538 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 539 hw->regstart); 540 goto err_resource_free; 541 } 542 543 csio_hw_init_workers(hw); 544 545 if (csio_hw_init(hw)) 546 goto err_unmap_bar; 547 548 csio_dfs_create(hw); 549 550 csio_dbg(hw, "hw:%p\n", hw); 551 552 return hw; 553 554 err_unmap_bar: 555 csio_hw_exit_workers(hw); 556 iounmap(hw->regstart); 557 err_resource_free: 558 csio_resource_free(hw); 559 err_free_hw: 560 kfree(hw); 561 err: 562 return NULL; 563 } 564 565 /* 566 * csio_hw_free - Uninitialize and free the HW module. 567 * @hw: The HW module 568 * 569 * Disable interrupts, uninit the HW module, free resources, free hw. 570 */ 571 static void 572 csio_hw_free(struct csio_hw *hw) 573 { 574 csio_intr_disable(hw, true); 575 csio_hw_exit_workers(hw); 576 csio_hw_exit(hw); 577 iounmap(hw->regstart); 578 csio_dfs_destroy(hw); 579 csio_resource_free(hw); 580 kfree(hw); 581 } 582 583 /** 584 * csio_shost_init - Create and initialize the lnode module. 585 * @hw: The HW module. 586 * @dev: The device associated with this invocation. 587 * @probe: Called from probe context or not? 588 * @os_pln: Parent lnode if any. 589 * 590 * Allocates lnode structure via scsi_host_alloc, initializes 591 * shost, initializes lnode module and registers with SCSI ML 592 * via scsi_host_add. This function is shared between physical and 593 * virtual node ports. 594 */ 595 struct csio_lnode * 596 csio_shost_init(struct csio_hw *hw, struct device *dev, 597 bool probe, struct csio_lnode *pln) 598 { 599 struct Scsi_Host *shost = NULL; 600 struct csio_lnode *ln; 601 602 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 603 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 604 605 /* 606 * hw->pdev is the physical port's PCI dev structure, 607 * which will be different from the NPIV dev structure. 608 */ 609 if (dev == &hw->pdev->dev) 610 shost = scsi_host_alloc( 611 &csio_fcoe_shost_template, 612 sizeof(struct csio_lnode)); 613 else 614 shost = scsi_host_alloc( 615 &csio_fcoe_shost_vport_template, 616 sizeof(struct csio_lnode)); 617 618 if (!shost) 619 goto err; 620 621 ln = shost_priv(shost); 622 memset(ln, 0, sizeof(struct csio_lnode)); 623 624 /* Link common lnode to this lnode */ 625 ln->dev_num = (shost->host_no << 16); 626 627 shost->can_queue = CSIO_MAX_QUEUE; 628 shost->this_id = -1; 629 shost->unique_id = shost->host_no; 630 shost->max_cmd_len = 16; /* Max CDB length supported */ 631 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 632 hw->fres_info.max_ssns); 633 shost->max_lun = CSIO_MAX_LUN; 634 if (dev == &hw->pdev->dev) 635 shost->transportt = csio_fcoe_transport; 636 else 637 shost->transportt = csio_fcoe_transport_vport; 638 639 /* root lnode */ 640 if (!hw->rln) 641 hw->rln = ln; 642 643 /* Other initialization here: Common, Transport specific */ 644 if (csio_lnode_init(ln, hw, pln)) 645 goto err_shost_put; 646 647 if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev)) 648 goto err_lnode_exit; 649 650 return ln; 651 652 err_lnode_exit: 653 csio_lnode_exit(ln); 654 err_shost_put: 655 scsi_host_put(shost); 656 err: 657 return NULL; 658 } 659 660 /** 661 * csio_shost_exit - De-instantiate the shost. 662 * @ln: The lnode module corresponding to the shost. 663 * 664 */ 665 void 666 csio_shost_exit(struct csio_lnode *ln) 667 { 668 struct Scsi_Host *shost = csio_ln_to_shost(ln); 669 struct csio_hw *hw = csio_lnode_to_hw(ln); 670 671 /* Inform transport */ 672 fc_remove_host(shost); 673 674 /* Inform SCSI ML */ 675 scsi_remove_host(shost); 676 677 /* Flush all the events, so that any rnode removal events 678 * already queued are all handled, before we remove the lnode. 679 */ 680 spin_lock_irq(&hw->lock); 681 csio_evtq_flush(hw); 682 spin_unlock_irq(&hw->lock); 683 684 csio_lnode_exit(ln); 685 scsi_host_put(shost); 686 } 687 688 struct csio_lnode * 689 csio_lnode_alloc(struct csio_hw *hw) 690 { 691 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 692 } 693 694 void 695 csio_lnodes_block_request(struct csio_hw *hw) 696 { 697 struct Scsi_Host *shost; 698 struct csio_lnode *sln; 699 struct csio_lnode *ln; 700 struct list_head *cur_ln, *cur_cln; 701 struct csio_lnode **lnode_list; 702 int cur_cnt = 0, ii; 703 704 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 705 GFP_KERNEL); 706 if (!lnode_list) { 707 csio_err(hw, "Failed to allocate lnodes_list"); 708 return; 709 } 710 711 spin_lock_irq(&hw->lock); 712 /* Traverse sibling lnodes */ 713 list_for_each(cur_ln, &hw->sln_head) { 714 sln = (struct csio_lnode *) cur_ln; 715 lnode_list[cur_cnt++] = sln; 716 717 /* Traverse children lnodes */ 718 list_for_each(cur_cln, &sln->cln_head) 719 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 720 } 721 spin_unlock_irq(&hw->lock); 722 723 for (ii = 0; ii < cur_cnt; ii++) { 724 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 725 ln = lnode_list[ii]; 726 shost = csio_ln_to_shost(ln); 727 scsi_block_requests(shost); 728 729 } 730 kfree(lnode_list); 731 } 732 733 void 734 csio_lnodes_unblock_request(struct csio_hw *hw) 735 { 736 struct csio_lnode *ln; 737 struct Scsi_Host *shost; 738 struct csio_lnode *sln; 739 struct list_head *cur_ln, *cur_cln; 740 struct csio_lnode **lnode_list; 741 int cur_cnt = 0, ii; 742 743 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 744 GFP_KERNEL); 745 if (!lnode_list) { 746 csio_err(hw, "Failed to allocate lnodes_list"); 747 return; 748 } 749 750 spin_lock_irq(&hw->lock); 751 /* Traverse sibling lnodes */ 752 list_for_each(cur_ln, &hw->sln_head) { 753 sln = (struct csio_lnode *) cur_ln; 754 lnode_list[cur_cnt++] = sln; 755 756 /* Traverse children lnodes */ 757 list_for_each(cur_cln, &sln->cln_head) 758 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 759 } 760 spin_unlock_irq(&hw->lock); 761 762 for (ii = 0; ii < cur_cnt; ii++) { 763 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 764 ln = lnode_list[ii]; 765 shost = csio_ln_to_shost(ln); 766 scsi_unblock_requests(shost); 767 } 768 kfree(lnode_list); 769 } 770 771 void 772 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 773 { 774 struct csio_lnode *ln; 775 struct Scsi_Host *shost; 776 struct csio_lnode *sln; 777 struct list_head *cur_ln, *cur_cln; 778 struct csio_lnode **lnode_list; 779 int cur_cnt = 0, ii; 780 781 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 782 GFP_KERNEL); 783 if (!lnode_list) { 784 csio_err(hw, "Failed to allocate lnodes_list"); 785 return; 786 } 787 788 spin_lock_irq(&hw->lock); 789 /* Traverse sibling lnodes */ 790 list_for_each(cur_ln, &hw->sln_head) { 791 sln = (struct csio_lnode *) cur_ln; 792 if (sln->portid != portid) 793 continue; 794 795 lnode_list[cur_cnt++] = sln; 796 797 /* Traverse children lnodes */ 798 list_for_each(cur_cln, &sln->cln_head) 799 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 800 } 801 spin_unlock_irq(&hw->lock); 802 803 for (ii = 0; ii < cur_cnt; ii++) { 804 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 805 ln = lnode_list[ii]; 806 shost = csio_ln_to_shost(ln); 807 scsi_block_requests(shost); 808 } 809 kfree(lnode_list); 810 } 811 812 void 813 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 814 { 815 struct csio_lnode *ln; 816 struct Scsi_Host *shost; 817 struct csio_lnode *sln; 818 struct list_head *cur_ln, *cur_cln; 819 struct csio_lnode **lnode_list; 820 int cur_cnt = 0, ii; 821 822 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 823 GFP_KERNEL); 824 if (!lnode_list) { 825 csio_err(hw, "Failed to allocate lnodes_list"); 826 return; 827 } 828 829 spin_lock_irq(&hw->lock); 830 /* Traverse sibling lnodes */ 831 list_for_each(cur_ln, &hw->sln_head) { 832 sln = (struct csio_lnode *) cur_ln; 833 if (sln->portid != portid) 834 continue; 835 lnode_list[cur_cnt++] = sln; 836 837 /* Traverse children lnodes */ 838 list_for_each(cur_cln, &sln->cln_head) 839 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 840 } 841 spin_unlock_irq(&hw->lock); 842 843 for (ii = 0; ii < cur_cnt; ii++) { 844 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 845 ln = lnode_list[ii]; 846 shost = csio_ln_to_shost(ln); 847 scsi_unblock_requests(shost); 848 } 849 kfree(lnode_list); 850 } 851 852 void 853 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 854 { 855 struct csio_lnode *sln; 856 struct csio_lnode *ln; 857 struct list_head *cur_ln, *cur_cln; 858 struct csio_lnode **lnode_list; 859 int cur_cnt = 0, ii; 860 861 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 862 GFP_KERNEL); 863 if (!lnode_list) { 864 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 865 return; 866 } 867 868 /* Get all child lnodes(NPIV ports) */ 869 spin_lock_irq(&hw->lock); 870 list_for_each(cur_ln, &hw->sln_head) { 871 sln = (struct csio_lnode *) cur_ln; 872 873 /* Traverse children lnodes */ 874 list_for_each(cur_cln, &sln->cln_head) 875 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 876 } 877 spin_unlock_irq(&hw->lock); 878 879 /* Delete NPIV lnodes */ 880 for (ii = 0; ii < cur_cnt; ii++) { 881 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 882 ln = lnode_list[ii]; 883 fc_vport_terminate(ln->fc_vport); 884 } 885 886 /* Delete only npiv lnodes */ 887 if (npiv) 888 goto free_lnodes; 889 890 cur_cnt = 0; 891 /* Get all physical lnodes */ 892 spin_lock_irq(&hw->lock); 893 /* Traverse sibling lnodes */ 894 list_for_each(cur_ln, &hw->sln_head) { 895 sln = (struct csio_lnode *) cur_ln; 896 lnode_list[cur_cnt++] = sln; 897 } 898 spin_unlock_irq(&hw->lock); 899 900 /* Delete physical lnodes */ 901 for (ii = 0; ii < cur_cnt; ii++) { 902 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 903 csio_shost_exit(lnode_list[ii]); 904 } 905 906 free_lnodes: 907 kfree(lnode_list); 908 } 909 910 /* 911 * csio_lnode_init_post: Set lnode attributes after starting HW. 912 * @ln: lnode. 913 * 914 */ 915 static void 916 csio_lnode_init_post(struct csio_lnode *ln) 917 { 918 struct Scsi_Host *shost = csio_ln_to_shost(ln); 919 920 csio_fchost_attr_init(ln); 921 922 scsi_scan_host(shost); 923 } 924 925 /* 926 * csio_probe_one - Instantiate this function. 927 * @pdev: PCI device 928 * @id: Device ID 929 * 930 * This is the .probe() callback of the driver. This function: 931 * - Initializes the PCI function by enabling MMIO, setting bus 932 * mastership and setting DMA mask. 933 * - Allocates HW structure, DMA, memory resources, maps BARS to 934 * host memory and initializes HW module. 935 * - Allocates lnode structure via scsi_host_alloc, initializes 936 * shost, initialized lnode module and registers with SCSI ML 937 * via scsi_host_add. 938 * - Enables interrupts, and starts the chip by kicking off the 939 * HW state machine. 940 * - Once hardware is ready, initiated scan of the host via 941 * scsi_scan_host. 942 */ 943 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 944 { 945 int rv; 946 int bars; 947 int i; 948 struct csio_hw *hw; 949 struct csio_lnode *ln; 950 951 /* probe only T5 and T6 cards */ 952 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && 953 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) 954 return -ENODEV; 955 956 rv = csio_pci_init(pdev, &bars); 957 if (rv) 958 goto err; 959 960 hw = csio_hw_alloc(pdev); 961 if (!hw) { 962 rv = -ENODEV; 963 goto err_pci_exit; 964 } 965 966 if (!pcie_relaxed_ordering_enabled(pdev)) 967 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; 968 969 pci_set_drvdata(pdev, hw); 970 971 rv = csio_hw_start(hw); 972 if (rv) { 973 if (rv == -EINVAL) { 974 dev_err(&pdev->dev, 975 "Failed to start FW, continuing in debug mode.\n"); 976 return 0; 977 } 978 goto err_lnode_exit; 979 } 980 981 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 982 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 983 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 984 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 985 FW_HDR_FW_VER_BUILD_G(hw->fwrev)); 986 987 for (i = 0; i < hw->num_pports; i++) { 988 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 989 if (!ln) { 990 rv = -ENODEV; 991 break; 992 } 993 /* Initialize portid */ 994 ln->portid = hw->pport[i].portid; 995 996 spin_lock_irq(&hw->lock); 997 if (csio_lnode_start(ln) != 0) 998 rv = -ENODEV; 999 spin_unlock_irq(&hw->lock); 1000 1001 if (rv) 1002 break; 1003 1004 csio_lnode_init_post(ln); 1005 } 1006 1007 if (rv) 1008 goto err_lnode_exit; 1009 1010 return 0; 1011 1012 err_lnode_exit: 1013 csio_lnodes_block_request(hw); 1014 spin_lock_irq(&hw->lock); 1015 csio_hw_stop(hw); 1016 spin_unlock_irq(&hw->lock); 1017 csio_lnodes_unblock_request(hw); 1018 csio_lnodes_exit(hw, 0); 1019 csio_hw_free(hw); 1020 err_pci_exit: 1021 csio_pci_exit(pdev, &bars); 1022 err: 1023 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1024 return rv; 1025 } 1026 1027 /* 1028 * csio_remove_one - Remove one instance of the driver at this PCI function. 1029 * @pdev: PCI device 1030 * 1031 * Used during hotplug operation. 1032 */ 1033 static void csio_remove_one(struct pci_dev *pdev) 1034 { 1035 struct csio_hw *hw = pci_get_drvdata(pdev); 1036 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1037 1038 csio_lnodes_block_request(hw); 1039 spin_lock_irq(&hw->lock); 1040 1041 /* Stops lnode, Rnode s/m 1042 * Quiesce IOs. 1043 * All sessions with remote ports are unregistered. 1044 */ 1045 csio_hw_stop(hw); 1046 spin_unlock_irq(&hw->lock); 1047 csio_lnodes_unblock_request(hw); 1048 1049 csio_lnodes_exit(hw, 0); 1050 csio_hw_free(hw); 1051 csio_pci_exit(pdev, &bars); 1052 } 1053 1054 /* 1055 * csio_pci_error_detected - PCI error was detected 1056 * @pdev: PCI device 1057 * 1058 */ 1059 static pci_ers_result_t 1060 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1061 { 1062 struct csio_hw *hw = pci_get_drvdata(pdev); 1063 1064 csio_lnodes_block_request(hw); 1065 spin_lock_irq(&hw->lock); 1066 1067 /* Post PCI error detected evt to HW s/m 1068 * HW s/m handles this evt by quiescing IOs, unregisters rports 1069 * and finally takes the device to offline. 1070 */ 1071 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1072 spin_unlock_irq(&hw->lock); 1073 csio_lnodes_unblock_request(hw); 1074 csio_lnodes_exit(hw, 0); 1075 csio_intr_disable(hw, true); 1076 pci_disable_device(pdev); 1077 return state == pci_channel_io_perm_failure ? 1078 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1079 } 1080 1081 /* 1082 * csio_pci_slot_reset - PCI slot has been reset. 1083 * @pdev: PCI device 1084 * 1085 */ 1086 static pci_ers_result_t 1087 csio_pci_slot_reset(struct pci_dev *pdev) 1088 { 1089 struct csio_hw *hw = pci_get_drvdata(pdev); 1090 int ready; 1091 1092 if (pci_enable_device(pdev)) { 1093 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1094 return PCI_ERS_RESULT_DISCONNECT; 1095 } 1096 1097 pci_set_master(pdev); 1098 pci_restore_state(pdev); 1099 pci_save_state(pdev); 1100 1101 /* Bring HW s/m to ready state. 1102 * but don't resume IOs. 1103 */ 1104 spin_lock_irq(&hw->lock); 1105 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1106 ready = csio_is_hw_ready(hw); 1107 spin_unlock_irq(&hw->lock); 1108 1109 if (ready) { 1110 return PCI_ERS_RESULT_RECOVERED; 1111 } else { 1112 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1113 return PCI_ERS_RESULT_DISCONNECT; 1114 } 1115 } 1116 1117 /* 1118 * csio_pci_resume - Resume normal operations 1119 * @pdev: PCI device 1120 * 1121 */ 1122 static void 1123 csio_pci_resume(struct pci_dev *pdev) 1124 { 1125 struct csio_hw *hw = pci_get_drvdata(pdev); 1126 struct csio_lnode *ln; 1127 int rv = 0; 1128 int i; 1129 1130 /* Bring the LINK UP and Resume IO */ 1131 1132 for (i = 0; i < hw->num_pports; i++) { 1133 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1134 if (!ln) { 1135 rv = -ENODEV; 1136 break; 1137 } 1138 /* Initialize portid */ 1139 ln->portid = hw->pport[i].portid; 1140 1141 spin_lock_irq(&hw->lock); 1142 if (csio_lnode_start(ln) != 0) 1143 rv = -ENODEV; 1144 spin_unlock_irq(&hw->lock); 1145 1146 if (rv) 1147 break; 1148 1149 csio_lnode_init_post(ln); 1150 } 1151 1152 if (rv) 1153 goto err_resume_exit; 1154 1155 return; 1156 1157 err_resume_exit: 1158 csio_lnodes_block_request(hw); 1159 spin_lock_irq(&hw->lock); 1160 csio_hw_stop(hw); 1161 spin_unlock_irq(&hw->lock); 1162 csio_lnodes_unblock_request(hw); 1163 csio_lnodes_exit(hw, 0); 1164 csio_hw_free(hw); 1165 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1166 } 1167 1168 static struct pci_error_handlers csio_err_handler = { 1169 .error_detected = csio_pci_error_detected, 1170 .slot_reset = csio_pci_slot_reset, 1171 .resume = csio_pci_resume, 1172 }; 1173 1174 /* 1175 * Macros needed to support the PCI Device ID Table ... 1176 */ 1177 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ 1178 static const struct pci_device_id csio_pci_tbl[] = { 1179 /* Define for FCoE uses PF6 */ 1180 #define CH_PCI_DEVICE_ID_FUNCTION 0x6 1181 1182 #define CH_PCI_ID_TABLE_ENTRY(devid) \ 1183 { PCI_VDEVICE(CHELSIO, (devid)), 0 } 1184 1185 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } 1186 1187 #include "t4_pci_id_tbl.h" 1188 1189 static struct pci_driver csio_pci_driver = { 1190 .name = KBUILD_MODNAME, 1191 .driver = { 1192 .owner = THIS_MODULE, 1193 }, 1194 .id_table = csio_pci_tbl, 1195 .probe = csio_probe_one, 1196 .remove = csio_remove_one, 1197 .err_handler = &csio_err_handler, 1198 }; 1199 1200 /* 1201 * csio_init - Chelsio storage driver initialization function. 1202 * 1203 */ 1204 static int __init 1205 csio_init(void) 1206 { 1207 int rv = -ENOMEM; 1208 1209 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1210 1211 csio_dfs_init(); 1212 1213 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1214 if (!csio_fcoe_transport) 1215 goto err; 1216 1217 csio_fcoe_transport_vport = 1218 fc_attach_transport(&csio_fc_transport_vport_funcs); 1219 if (!csio_fcoe_transport_vport) 1220 goto err_vport; 1221 1222 rv = pci_register_driver(&csio_pci_driver); 1223 if (rv) 1224 goto err_pci; 1225 1226 return 0; 1227 1228 err_pci: 1229 fc_release_transport(csio_fcoe_transport_vport); 1230 err_vport: 1231 fc_release_transport(csio_fcoe_transport); 1232 err: 1233 csio_dfs_exit(); 1234 return rv; 1235 } 1236 1237 /* 1238 * csio_exit - Chelsio storage driver uninitialization . 1239 * 1240 * Function that gets called in the unload path. 1241 */ 1242 static void __exit 1243 csio_exit(void) 1244 { 1245 pci_unregister_driver(&csio_pci_driver); 1246 csio_dfs_exit(); 1247 fc_release_transport(csio_fcoe_transport_vport); 1248 fc_release_transport(csio_fcoe_transport); 1249 } 1250 1251 module_init(csio_init); 1252 module_exit(csio_exit); 1253 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1254 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1255 MODULE_LICENSE("Dual BSD/GPL"); 1256 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1257 MODULE_VERSION(CSIO_DRV_VERSION); 1258 MODULE_FIRMWARE(FW_FNAME_T5); 1259 MODULE_FIRMWARE(FW_FNAME_T6); 1260