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 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); 525 526 /* memory pool/DMA pool allocation */ 527 if (csio_resource_alloc(hw)) 528 goto err_free_hw; 529 530 /* Get the start address of registers from BAR 0 */ 531 hw->regstart = ioremap(pci_resource_start(pdev, 0), 532 pci_resource_len(pdev, 0)); 533 if (!hw->regstart) { 534 csio_err(hw, "Could not map BAR 0, regstart = %p\n", 535 hw->regstart); 536 goto err_resource_free; 537 } 538 539 csio_hw_init_workers(hw); 540 541 if (csio_hw_init(hw)) 542 goto err_unmap_bar; 543 544 csio_dfs_create(hw); 545 546 csio_dbg(hw, "hw:%p\n", hw); 547 548 return hw; 549 550 err_unmap_bar: 551 csio_hw_exit_workers(hw); 552 iounmap(hw->regstart); 553 err_resource_free: 554 csio_resource_free(hw); 555 err_free_hw: 556 kfree(hw); 557 err: 558 return NULL; 559 } 560 561 /* 562 * csio_hw_free - Uninitialize and free the HW module. 563 * @hw: The HW module 564 * 565 * Disable interrupts, uninit the HW module, free resources, free hw. 566 */ 567 static void 568 csio_hw_free(struct csio_hw *hw) 569 { 570 csio_intr_disable(hw, true); 571 csio_hw_exit_workers(hw); 572 csio_hw_exit(hw); 573 iounmap(hw->regstart); 574 csio_dfs_destroy(hw); 575 csio_resource_free(hw); 576 kfree(hw); 577 } 578 579 /** 580 * csio_shost_init - Create and initialize the lnode module. 581 * @hw: The HW module. 582 * @dev: The device associated with this invocation. 583 * @probe: Called from probe context or not? 584 * @pln: Parent lnode if any. 585 * 586 * Allocates lnode structure via scsi_host_alloc, initializes 587 * shost, initializes lnode module and registers with SCSI ML 588 * via scsi_host_add. This function is shared between physical and 589 * virtual node ports. 590 */ 591 struct csio_lnode * 592 csio_shost_init(struct csio_hw *hw, struct device *dev, 593 bool probe, struct csio_lnode *pln) 594 { 595 struct Scsi_Host *shost = NULL; 596 struct csio_lnode *ln; 597 598 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; 599 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; 600 601 /* 602 * hw->pdev is the physical port's PCI dev structure, 603 * which will be different from the NPIV dev structure. 604 */ 605 if (dev == &hw->pdev->dev) 606 shost = scsi_host_alloc( 607 &csio_fcoe_shost_template, 608 sizeof(struct csio_lnode)); 609 else 610 shost = scsi_host_alloc( 611 &csio_fcoe_shost_vport_template, 612 sizeof(struct csio_lnode)); 613 614 if (!shost) 615 goto err; 616 617 ln = shost_priv(shost); 618 memset(ln, 0, sizeof(struct csio_lnode)); 619 620 /* Link common lnode to this lnode */ 621 ln->dev_num = (shost->host_no << 16); 622 623 shost->can_queue = CSIO_MAX_QUEUE; 624 shost->this_id = -1; 625 shost->unique_id = shost->host_no; 626 shost->max_cmd_len = 16; /* Max CDB length supported */ 627 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, 628 hw->fres_info.max_ssns); 629 shost->max_lun = CSIO_MAX_LUN; 630 if (dev == &hw->pdev->dev) 631 shost->transportt = csio_fcoe_transport; 632 else 633 shost->transportt = csio_fcoe_transport_vport; 634 635 /* root lnode */ 636 if (!hw->rln) 637 hw->rln = ln; 638 639 /* Other initialization here: Common, Transport specific */ 640 if (csio_lnode_init(ln, hw, pln)) 641 goto err_shost_put; 642 643 if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev)) 644 goto err_lnode_exit; 645 646 return ln; 647 648 err_lnode_exit: 649 csio_lnode_exit(ln); 650 err_shost_put: 651 scsi_host_put(shost); 652 err: 653 return NULL; 654 } 655 656 /** 657 * csio_shost_exit - De-instantiate the shost. 658 * @ln: The lnode module corresponding to the shost. 659 * 660 */ 661 void 662 csio_shost_exit(struct csio_lnode *ln) 663 { 664 struct Scsi_Host *shost = csio_ln_to_shost(ln); 665 struct csio_hw *hw = csio_lnode_to_hw(ln); 666 667 /* Inform transport */ 668 fc_remove_host(shost); 669 670 /* Inform SCSI ML */ 671 scsi_remove_host(shost); 672 673 /* Flush all the events, so that any rnode removal events 674 * already queued are all handled, before we remove the lnode. 675 */ 676 spin_lock_irq(&hw->lock); 677 csio_evtq_flush(hw); 678 spin_unlock_irq(&hw->lock); 679 680 csio_lnode_exit(ln); 681 scsi_host_put(shost); 682 } 683 684 struct csio_lnode * 685 csio_lnode_alloc(struct csio_hw *hw) 686 { 687 return csio_shost_init(hw, &hw->pdev->dev, false, NULL); 688 } 689 690 void 691 csio_lnodes_block_request(struct csio_hw *hw) 692 { 693 struct Scsi_Host *shost; 694 struct csio_lnode *sln; 695 struct csio_lnode *ln; 696 struct list_head *cur_ln, *cur_cln; 697 struct csio_lnode **lnode_list; 698 int cur_cnt = 0, ii; 699 700 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 701 GFP_KERNEL); 702 if (!lnode_list) { 703 csio_err(hw, "Failed to allocate lnodes_list"); 704 return; 705 } 706 707 spin_lock_irq(&hw->lock); 708 /* Traverse sibling lnodes */ 709 list_for_each(cur_ln, &hw->sln_head) { 710 sln = (struct csio_lnode *) cur_ln; 711 lnode_list[cur_cnt++] = sln; 712 713 /* Traverse children lnodes */ 714 list_for_each(cur_cln, &sln->cln_head) 715 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 716 } 717 spin_unlock_irq(&hw->lock); 718 719 for (ii = 0; ii < cur_cnt; ii++) { 720 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 721 ln = lnode_list[ii]; 722 shost = csio_ln_to_shost(ln); 723 scsi_block_requests(shost); 724 725 } 726 kfree(lnode_list); 727 } 728 729 void 730 csio_lnodes_unblock_request(struct csio_hw *hw) 731 { 732 struct csio_lnode *ln; 733 struct Scsi_Host *shost; 734 struct csio_lnode *sln; 735 struct list_head *cur_ln, *cur_cln; 736 struct csio_lnode **lnode_list; 737 int cur_cnt = 0, ii; 738 739 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 740 GFP_KERNEL); 741 if (!lnode_list) { 742 csio_err(hw, "Failed to allocate lnodes_list"); 743 return; 744 } 745 746 spin_lock_irq(&hw->lock); 747 /* Traverse sibling lnodes */ 748 list_for_each(cur_ln, &hw->sln_head) { 749 sln = (struct csio_lnode *) cur_ln; 750 lnode_list[cur_cnt++] = sln; 751 752 /* Traverse children lnodes */ 753 list_for_each(cur_cln, &sln->cln_head) 754 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 755 } 756 spin_unlock_irq(&hw->lock); 757 758 for (ii = 0; ii < cur_cnt; ii++) { 759 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 760 ln = lnode_list[ii]; 761 shost = csio_ln_to_shost(ln); 762 scsi_unblock_requests(shost); 763 } 764 kfree(lnode_list); 765 } 766 767 void 768 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) 769 { 770 struct csio_lnode *ln; 771 struct Scsi_Host *shost; 772 struct csio_lnode *sln; 773 struct list_head *cur_ln, *cur_cln; 774 struct csio_lnode **lnode_list; 775 int cur_cnt = 0, ii; 776 777 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 778 GFP_KERNEL); 779 if (!lnode_list) { 780 csio_err(hw, "Failed to allocate lnodes_list"); 781 return; 782 } 783 784 spin_lock_irq(&hw->lock); 785 /* Traverse sibling lnodes */ 786 list_for_each(cur_ln, &hw->sln_head) { 787 sln = (struct csio_lnode *) cur_ln; 788 if (sln->portid != portid) 789 continue; 790 791 lnode_list[cur_cnt++] = sln; 792 793 /* Traverse children lnodes */ 794 list_for_each(cur_cln, &sln->cln_head) 795 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 796 } 797 spin_unlock_irq(&hw->lock); 798 799 for (ii = 0; ii < cur_cnt; ii++) { 800 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); 801 ln = lnode_list[ii]; 802 shost = csio_ln_to_shost(ln); 803 scsi_block_requests(shost); 804 } 805 kfree(lnode_list); 806 } 807 808 void 809 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) 810 { 811 struct csio_lnode *ln; 812 struct Scsi_Host *shost; 813 struct csio_lnode *sln; 814 struct list_head *cur_ln, *cur_cln; 815 struct csio_lnode **lnode_list; 816 int cur_cnt = 0, ii; 817 818 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 819 GFP_KERNEL); 820 if (!lnode_list) { 821 csio_err(hw, "Failed to allocate lnodes_list"); 822 return; 823 } 824 825 spin_lock_irq(&hw->lock); 826 /* Traverse sibling lnodes */ 827 list_for_each(cur_ln, &hw->sln_head) { 828 sln = (struct csio_lnode *) cur_ln; 829 if (sln->portid != portid) 830 continue; 831 lnode_list[cur_cnt++] = sln; 832 833 /* Traverse children lnodes */ 834 list_for_each(cur_cln, &sln->cln_head) 835 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 836 } 837 spin_unlock_irq(&hw->lock); 838 839 for (ii = 0; ii < cur_cnt; ii++) { 840 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); 841 ln = lnode_list[ii]; 842 shost = csio_ln_to_shost(ln); 843 scsi_unblock_requests(shost); 844 } 845 kfree(lnode_list); 846 } 847 848 void 849 csio_lnodes_exit(struct csio_hw *hw, bool npiv) 850 { 851 struct csio_lnode *sln; 852 struct csio_lnode *ln; 853 struct list_head *cur_ln, *cur_cln; 854 struct csio_lnode **lnode_list; 855 int cur_cnt = 0, ii; 856 857 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), 858 GFP_KERNEL); 859 if (!lnode_list) { 860 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); 861 return; 862 } 863 864 /* Get all child lnodes(NPIV ports) */ 865 spin_lock_irq(&hw->lock); 866 list_for_each(cur_ln, &hw->sln_head) { 867 sln = (struct csio_lnode *) cur_ln; 868 869 /* Traverse children lnodes */ 870 list_for_each(cur_cln, &sln->cln_head) 871 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; 872 } 873 spin_unlock_irq(&hw->lock); 874 875 /* Delete NPIV lnodes */ 876 for (ii = 0; ii < cur_cnt; ii++) { 877 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); 878 ln = lnode_list[ii]; 879 fc_vport_terminate(ln->fc_vport); 880 } 881 882 /* Delete only npiv lnodes */ 883 if (npiv) 884 goto free_lnodes; 885 886 cur_cnt = 0; 887 /* Get all physical lnodes */ 888 spin_lock_irq(&hw->lock); 889 /* Traverse sibling lnodes */ 890 list_for_each(cur_ln, &hw->sln_head) { 891 sln = (struct csio_lnode *) cur_ln; 892 lnode_list[cur_cnt++] = sln; 893 } 894 spin_unlock_irq(&hw->lock); 895 896 /* Delete physical lnodes */ 897 for (ii = 0; ii < cur_cnt; ii++) { 898 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); 899 csio_shost_exit(lnode_list[ii]); 900 } 901 902 free_lnodes: 903 kfree(lnode_list); 904 } 905 906 /* 907 * csio_lnode_init_post: Set lnode attributes after starting HW. 908 * @ln: lnode. 909 * 910 */ 911 static void 912 csio_lnode_init_post(struct csio_lnode *ln) 913 { 914 struct Scsi_Host *shost = csio_ln_to_shost(ln); 915 916 csio_fchost_attr_init(ln); 917 918 scsi_scan_host(shost); 919 } 920 921 /* 922 * csio_probe_one - Instantiate this function. 923 * @pdev: PCI device 924 * @id: Device ID 925 * 926 * This is the .probe() callback of the driver. This function: 927 * - Initializes the PCI function by enabling MMIO, setting bus 928 * mastership and setting DMA mask. 929 * - Allocates HW structure, DMA, memory resources, maps BARS to 930 * host memory and initializes HW module. 931 * - Allocates lnode structure via scsi_host_alloc, initializes 932 * shost, initialized lnode module and registers with SCSI ML 933 * via scsi_host_add. 934 * - Enables interrupts, and starts the chip by kicking off the 935 * HW state machine. 936 * - Once hardware is ready, initiated scan of the host via 937 * scsi_scan_host. 938 */ 939 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 940 { 941 int rv; 942 int bars; 943 int i; 944 struct csio_hw *hw; 945 struct csio_lnode *ln; 946 947 /* probe only T5 and T6 cards */ 948 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && 949 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) 950 return -ENODEV; 951 952 rv = csio_pci_init(pdev, &bars); 953 if (rv) 954 goto err; 955 956 hw = csio_hw_alloc(pdev); 957 if (!hw) { 958 rv = -ENODEV; 959 goto err_pci_exit; 960 } 961 962 if (!pcie_relaxed_ordering_enabled(pdev)) 963 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; 964 965 pci_set_drvdata(pdev, hw); 966 967 rv = csio_hw_start(hw); 968 if (rv) { 969 if (rv == -EINVAL) { 970 dev_err(&pdev->dev, 971 "Failed to start FW, continuing in debug mode.\n"); 972 return 0; 973 } 974 goto err_lnode_exit; 975 } 976 977 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", 978 FW_HDR_FW_VER_MAJOR_G(hw->fwrev), 979 FW_HDR_FW_VER_MINOR_G(hw->fwrev), 980 FW_HDR_FW_VER_MICRO_G(hw->fwrev), 981 FW_HDR_FW_VER_BUILD_G(hw->fwrev)); 982 983 for (i = 0; i < hw->num_pports; i++) { 984 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 985 if (!ln) { 986 rv = -ENODEV; 987 break; 988 } 989 /* Initialize portid */ 990 ln->portid = hw->pport[i].portid; 991 992 spin_lock_irq(&hw->lock); 993 if (csio_lnode_start(ln) != 0) 994 rv = -ENODEV; 995 spin_unlock_irq(&hw->lock); 996 997 if (rv) 998 break; 999 1000 csio_lnode_init_post(ln); 1001 } 1002 1003 if (rv) 1004 goto err_lnode_exit; 1005 1006 return 0; 1007 1008 err_lnode_exit: 1009 csio_lnodes_block_request(hw); 1010 spin_lock_irq(&hw->lock); 1011 csio_hw_stop(hw); 1012 spin_unlock_irq(&hw->lock); 1013 csio_lnodes_unblock_request(hw); 1014 csio_lnodes_exit(hw, 0); 1015 csio_hw_free(hw); 1016 err_pci_exit: 1017 csio_pci_exit(pdev, &bars); 1018 err: 1019 dev_err(&pdev->dev, "probe of device failed: %d\n", rv); 1020 return rv; 1021 } 1022 1023 /* 1024 * csio_remove_one - Remove one instance of the driver at this PCI function. 1025 * @pdev: PCI device 1026 * 1027 * Used during hotplug operation. 1028 */ 1029 static void csio_remove_one(struct pci_dev *pdev) 1030 { 1031 struct csio_hw *hw = pci_get_drvdata(pdev); 1032 int bars = pci_select_bars(pdev, IORESOURCE_MEM); 1033 1034 csio_lnodes_block_request(hw); 1035 spin_lock_irq(&hw->lock); 1036 1037 /* Stops lnode, Rnode s/m 1038 * Quiesce IOs. 1039 * All sessions with remote ports are unregistered. 1040 */ 1041 csio_hw_stop(hw); 1042 spin_unlock_irq(&hw->lock); 1043 csio_lnodes_unblock_request(hw); 1044 1045 csio_lnodes_exit(hw, 0); 1046 csio_hw_free(hw); 1047 csio_pci_exit(pdev, &bars); 1048 } 1049 1050 /* 1051 * csio_pci_error_detected - PCI error was detected 1052 * @pdev: PCI device 1053 * 1054 */ 1055 static pci_ers_result_t 1056 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 1057 { 1058 struct csio_hw *hw = pci_get_drvdata(pdev); 1059 1060 csio_lnodes_block_request(hw); 1061 spin_lock_irq(&hw->lock); 1062 1063 /* Post PCI error detected evt to HW s/m 1064 * HW s/m handles this evt by quiescing IOs, unregisters rports 1065 * and finally takes the device to offline. 1066 */ 1067 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); 1068 spin_unlock_irq(&hw->lock); 1069 csio_lnodes_unblock_request(hw); 1070 csio_lnodes_exit(hw, 0); 1071 csio_intr_disable(hw, true); 1072 pci_disable_device(pdev); 1073 return state == pci_channel_io_perm_failure ? 1074 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; 1075 } 1076 1077 /* 1078 * csio_pci_slot_reset - PCI slot has been reset. 1079 * @pdev: PCI device 1080 * 1081 */ 1082 static pci_ers_result_t 1083 csio_pci_slot_reset(struct pci_dev *pdev) 1084 { 1085 struct csio_hw *hw = pci_get_drvdata(pdev); 1086 int ready; 1087 1088 if (pci_enable_device(pdev)) { 1089 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); 1090 return PCI_ERS_RESULT_DISCONNECT; 1091 } 1092 1093 pci_set_master(pdev); 1094 pci_restore_state(pdev); 1095 pci_save_state(pdev); 1096 1097 /* Bring HW s/m to ready state. 1098 * but don't resume IOs. 1099 */ 1100 spin_lock_irq(&hw->lock); 1101 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); 1102 ready = csio_is_hw_ready(hw); 1103 spin_unlock_irq(&hw->lock); 1104 1105 if (ready) { 1106 return PCI_ERS_RESULT_RECOVERED; 1107 } else { 1108 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); 1109 return PCI_ERS_RESULT_DISCONNECT; 1110 } 1111 } 1112 1113 /* 1114 * csio_pci_resume - Resume normal operations 1115 * @pdev: PCI device 1116 * 1117 */ 1118 static void 1119 csio_pci_resume(struct pci_dev *pdev) 1120 { 1121 struct csio_hw *hw = pci_get_drvdata(pdev); 1122 struct csio_lnode *ln; 1123 int rv = 0; 1124 int i; 1125 1126 /* Bring the LINK UP and Resume IO */ 1127 1128 for (i = 0; i < hw->num_pports; i++) { 1129 ln = csio_shost_init(hw, &pdev->dev, true, NULL); 1130 if (!ln) { 1131 rv = -ENODEV; 1132 break; 1133 } 1134 /* Initialize portid */ 1135 ln->portid = hw->pport[i].portid; 1136 1137 spin_lock_irq(&hw->lock); 1138 if (csio_lnode_start(ln) != 0) 1139 rv = -ENODEV; 1140 spin_unlock_irq(&hw->lock); 1141 1142 if (rv) 1143 break; 1144 1145 csio_lnode_init_post(ln); 1146 } 1147 1148 if (rv) 1149 goto err_resume_exit; 1150 1151 return; 1152 1153 err_resume_exit: 1154 csio_lnodes_block_request(hw); 1155 spin_lock_irq(&hw->lock); 1156 csio_hw_stop(hw); 1157 spin_unlock_irq(&hw->lock); 1158 csio_lnodes_unblock_request(hw); 1159 csio_lnodes_exit(hw, 0); 1160 csio_hw_free(hw); 1161 dev_err(&pdev->dev, "resume of device failed: %d\n", rv); 1162 } 1163 1164 static struct pci_error_handlers csio_err_handler = { 1165 .error_detected = csio_pci_error_detected, 1166 .slot_reset = csio_pci_slot_reset, 1167 .resume = csio_pci_resume, 1168 }; 1169 1170 /* 1171 * Macros needed to support the PCI Device ID Table ... 1172 */ 1173 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ 1174 static const struct pci_device_id csio_pci_tbl[] = { 1175 /* Define for FCoE uses PF6 */ 1176 #define CH_PCI_DEVICE_ID_FUNCTION 0x6 1177 1178 #define CH_PCI_ID_TABLE_ENTRY(devid) \ 1179 { PCI_VDEVICE(CHELSIO, (devid)), 0 } 1180 1181 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } 1182 1183 #include "t4_pci_id_tbl.h" 1184 1185 static struct pci_driver csio_pci_driver = { 1186 .name = KBUILD_MODNAME, 1187 .driver = { 1188 .owner = THIS_MODULE, 1189 }, 1190 .id_table = csio_pci_tbl, 1191 .probe = csio_probe_one, 1192 .remove = csio_remove_one, 1193 .err_handler = &csio_err_handler, 1194 }; 1195 1196 /* 1197 * csio_init - Chelsio storage driver initialization function. 1198 * 1199 */ 1200 static int __init 1201 csio_init(void) 1202 { 1203 int rv = -ENOMEM; 1204 1205 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); 1206 1207 csio_dfs_init(); 1208 1209 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); 1210 if (!csio_fcoe_transport) 1211 goto err; 1212 1213 csio_fcoe_transport_vport = 1214 fc_attach_transport(&csio_fc_transport_vport_funcs); 1215 if (!csio_fcoe_transport_vport) 1216 goto err_vport; 1217 1218 rv = pci_register_driver(&csio_pci_driver); 1219 if (rv) 1220 goto err_pci; 1221 1222 return 0; 1223 1224 err_pci: 1225 fc_release_transport(csio_fcoe_transport_vport); 1226 err_vport: 1227 fc_release_transport(csio_fcoe_transport); 1228 err: 1229 csio_dfs_exit(); 1230 return rv; 1231 } 1232 1233 /* 1234 * csio_exit - Chelsio storage driver uninitialization . 1235 * 1236 * Function that gets called in the unload path. 1237 */ 1238 static void __exit 1239 csio_exit(void) 1240 { 1241 pci_unregister_driver(&csio_pci_driver); 1242 csio_dfs_exit(); 1243 fc_release_transport(csio_fcoe_transport_vport); 1244 fc_release_transport(csio_fcoe_transport); 1245 } 1246 1247 module_init(csio_init); 1248 module_exit(csio_exit); 1249 MODULE_AUTHOR(CSIO_DRV_AUTHOR); 1250 MODULE_DESCRIPTION(CSIO_DRV_DESC); 1251 MODULE_LICENSE("Dual BSD/GPL"); 1252 MODULE_DEVICE_TABLE(pci, csio_pci_tbl); 1253 MODULE_VERSION(CSIO_DRV_VERSION); 1254 MODULE_FIRMWARE(FW_FNAME_T5); 1255 MODULE_FIRMWARE(FW_FNAME_T6); 1256 MODULE_SOFTDEP("pre: cxgb4"); 1257