drivers/scsi/csiostor/csio

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This source file includes following definitions.
csio_mem_read
csio_add_debugfs_mem
csio_setup_debugfs
csio_dfs_create
csio_dfs_destroy
csio_dfs_init
csio_dfs_exit
csio_pci_init
csio_pci_exit
csio_hw_init_workers
csio_hw_exit_workers
csio_create_queues
csio_config_queues
csio_resource_alloc
csio_resource_free
csio_hw_alloc
csio_hw_free
csio_shost_init
csio_shost_exit
csio_lnode_alloc
csio_lnodes_block_request
csio_lnodes_unblock_request
csio_lnodes_block_by_port
csio_lnodes_unblock_by_port
csio_lnodes_exit
csio_lnode_init_post
csio_probe_one
csio_remove_one
csio_pci_error_detected
csio_pci_slot_reset
csio_pci_resume
csio_init
csio_exit
   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);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/csiostor/csio_init.c

DEFINITIONS
