release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/cxgb3i/cxgb3i_init.c

   1 /* cxgb3i_init.c: Chelsio S3xx iSCSI driver.
   2  *
   3  * Copyright (c) 2008 Chelsio Communications, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation.
   8  *
   9  * Written by: Karen Xie (kxie@chelsio.com)
  10  */
  11
  12 #include "cxgb3i.h"
  13
  14 #define DRV_MODULE_NAME         "cxgb3i"
  15 #define DRV_MODULE_VERSION      "1.0.2"
  16 #define DRV_MODULE_RELDATE      "Mar. 2009"
  17
  18 static char version[] =
  19         "Chelsio S3xx iSCSI Driver " DRV_MODULE_NAME
  20         " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
  21
  22 MODULE_AUTHOR("Karen Xie <kxie@chelsio.com>");
  23 MODULE_DESCRIPTION("Chelsio S3xx iSCSI Driver");
  24 MODULE_LICENSE("GPL");
  25 MODULE_VERSION(DRV_MODULE_VERSION);
  26
  27 static void open_s3_dev(struct t3cdev *);
  28 static void close_s3_dev(struct t3cdev *);
  29 static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port);
  30
  31 static cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS];
  32 static struct cxgb3_client t3c_client = {
  33         .name = "iscsi_cxgb3",
  34         .handlers = cxgb3i_cpl_handlers,
  35         .add = open_s3_dev,
  36         .remove = close_s3_dev,
  37         .event_handler = s3_event_handler,
  38 };
  39
  40 /**
  41  * open_s3_dev - register with cxgb3 LLD
  42  * @t3dev:      cxgb3 adapter instance
  43  */
  44 static void open_s3_dev(struct t3cdev *t3dev)
  45 {
  46         static int vers_printed;
  47
  48         if (!vers_printed) {
  49                 printk(KERN_INFO "%s", version);
  50                 vers_printed = 1;
  51         }
  52
  53         cxgb3i_ddp_init(t3dev);
  54         cxgb3i_sdev_add(t3dev, &t3c_client);
  55         cxgb3i_adapter_open(t3dev);
  56 }
  57
  58 /**
  59  * close_s3_dev - de-register with cxgb3 LLD
  60  * @t3dev:      cxgb3 adapter instance
  61  */
  62 static void close_s3_dev(struct t3cdev *t3dev)
  63 {
  64         cxgb3i_adapter_close(t3dev);
  65         cxgb3i_sdev_remove(t3dev);
  66         cxgb3i_ddp_cleanup(t3dev);
  67 }
  68
  69 static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port)
  70 {
  71         struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(tdev);
  72
  73         cxgb3i_log_info("snic 0x%p, tdev 0x%p, event 0x%x, port 0x%x.\n",
  74                         snic, tdev, event, port);
  75         if (!snic)
  76                 return;
  77
  78         switch (event) {
  79         case OFFLOAD_STATUS_DOWN:
  80                 snic->flags |= CXGB3I_ADAPTER_FLAG_RESET;
  81                 break;
  82         case OFFLOAD_STATUS_UP:
  83                 snic->flags &= ~CXGB3I_ADAPTER_FLAG_RESET;
  84                 break;
  85         }
  86 }
  87
  88 /**
  89  * cxgb3i_init_module - module init entry point
  90  *
  91  * initialize any driver wide global data structures and register itself
  92  *      with the cxgb3 module
  93  */
  94 static int __init cxgb3i_init_module(void)
  95 {
  96         int err;
  97
  98         err = cxgb3i_sdev_init(cxgb3i_cpl_handlers);
  99         if (err < 0)
 100                 return err;
 101
 102         err = cxgb3i_iscsi_init();
 103         if (err < 0)
 104                 return err;
 105
 106         err = cxgb3i_pdu_init();
 107         if (err < 0) {
 108                 cxgb3i_iscsi_cleanup();
 109                 return err;
 110         }
 111
 112         cxgb3_register_client(&t3c_client);
 113
 114         return 0;
 115 }
 116
 117 /**
 118  * cxgb3i_exit_module - module cleanup/exit entry point
 119  *
 120  * go through the driver hba list and for each hba, release any resource held.
 121  *      and unregisters iscsi transport and the cxgb3 module
 122  */
 123 static void __exit cxgb3i_exit_module(void)
 124 {
 125         cxgb3_unregister_client(&t3c_client);
 126         cxgb3i_pdu_cleanup();
 127         cxgb3i_iscsi_cleanup();
 128         cxgb3i_sdev_cleanup();
 129 }
 130
 131 module_init(cxgb3i_init_module);
 132 module_exit(cxgb3i_exit_module);