Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 2 | * zfcp device driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 4 | * Module interface and handling of zfcp data structures. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 6 | * Copyright IBM Corporation 2002, 2008 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Andreas Herrmann | 4a9d2d8 | 2006-05-22 18:14:08 +0200 | [diff] [blame] | 9 | /* |
| 10 | * Driver authors: |
| 11 | * Martin Peschke (originator of the driver) |
| 12 | * Raimund Schroeder |
| 13 | * Aron Zeh |
| 14 | * Wolfgang Taphorn |
| 15 | * Stefan Bader |
| 16 | * Heiko Carstens (kernel 2.6 port of the driver) |
| 17 | * Andreas Herrmann |
| 18 | * Maxim Shchetynin |
| 19 | * Volker Sameske |
| 20 | * Ralph Wuerthner |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 21 | * Michael Loehr |
| 22 | * Swen Schillig |
| 23 | * Christof Schmitt |
| 24 | * Martin Petermann |
| 25 | * Sven Schuetz |
Andreas Herrmann | 4a9d2d8 | 2006-05-22 18:14:08 +0200 | [diff] [blame] | 26 | */ |
| 27 | |
Christof Schmitt | 45633fd | 2008-06-10 18:20:55 +0200 | [diff] [blame] | 28 | #include <linux/miscdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "zfcp_ext.h" |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | static char *device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Andreas Herrmann | 4a9d2d8 | 2006-05-22 18:14:08 +0200 | [diff] [blame] | 33 | MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com"); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 34 | MODULE_DESCRIPTION("FCP HBA driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | MODULE_LICENSE("GPL"); |
| 36 | |
| 6f71d9b | 2005-04-10 23:04:28 -0500 | [diff] [blame] | 37 | module_param(device, charp, 0400); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | MODULE_PARM_DESC(device, "specify initial device"); |
| 39 | |
Heiko Carstens | ca2d02c | 2007-05-08 11:17:54 +0200 | [diff] [blame] | 40 | static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter) |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 41 | { |
Heiko Carstens | ca2d02c | 2007-05-08 11:17:54 +0200 | [diff] [blame] | 42 | int idx; |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 43 | |
| 44 | adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head), |
| 45 | GFP_KERNEL); |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 46 | if (!adapter->req_list) |
| 47 | return -ENOMEM; |
| 48 | |
Heiko Carstens | ca2d02c | 2007-05-08 11:17:54 +0200 | [diff] [blame] | 49 | for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) |
| 50 | INIT_LIST_HEAD(&adapter->req_list[idx]); |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 51 | return 0; |
| 52 | } |
| 53 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 54 | /** |
| 55 | * zfcp_reqlist_isempty - is the request list empty |
| 56 | * @adapter: pointer to struct zfcp_adapter |
| 57 | * |
| 58 | * Returns: true if list is empty, false otherwise |
| 59 | */ |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 60 | int zfcp_reqlist_isempty(struct zfcp_adapter *adapter) |
| 61 | { |
Heiko Carstens | ca2d02c | 2007-05-08 11:17:54 +0200 | [diff] [blame] | 62 | unsigned int idx; |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 63 | |
Heiko Carstens | ca2d02c | 2007-05-08 11:17:54 +0200 | [diff] [blame] | 64 | for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) |
| 65 | if (!list_empty(&adapter->req_list[idx])) |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 66 | return 0; |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 67 | return 1; |
| 68 | } |
| 69 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 70 | static int __init zfcp_device_setup(char *devstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 72 | char *token; |
| 73 | char *str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Andreas Herrmann | cd8a383 | 2005-06-13 13:22:25 +0200 | [diff] [blame] | 75 | if (!devstr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | return 0; |
| 77 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 78 | /* duplicate devstr and keep the original for sysfs presentation*/ |
| 79 | str = kmalloc(strlen(devstr) + 1, GFP_KERNEL); |
| 80 | if (!str) |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 81 | return 0; |
Andreas Herrmann | cd8a383 | 2005-06-13 13:22:25 +0200 | [diff] [blame] | 82 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 83 | strcpy(str, devstr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 85 | token = strsep(&str, ","); |
| 86 | if (!token || strlen(token) >= BUS_ID_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | goto err_out; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 88 | strncpy(zfcp_data.init_busid, token, BUS_ID_SIZE); |
| 89 | |
| 90 | token = strsep(&str, ","); |
Swen Schillig | 7ba58c9 | 2008-10-01 12:42:18 +0200 | [diff] [blame] | 91 | if (!token || strict_strtoull(token, 0, |
| 92 | (unsigned long long *) &zfcp_data.init_wwpn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | goto err_out; |
| 94 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 95 | token = strsep(&str, ","); |
Swen Schillig | 7ba58c9 | 2008-10-01 12:42:18 +0200 | [diff] [blame] | 96 | if (!token || strict_strtoull(token, 0, |
| 97 | (unsigned long long *) &zfcp_data.init_fcp_lun)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | goto err_out; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 99 | |
Andreas Herrmann | cd8a383 | 2005-06-13 13:22:25 +0200 | [diff] [blame] | 100 | kfree(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | return 1; |
| 102 | |
| 103 | err_out: |
Andreas Herrmann | cd8a383 | 2005-06-13 13:22:25 +0200 | [diff] [blame] | 104 | kfree(str); |
Christof Schmitt | ff3b24f | 2008-10-01 12:42:15 +0200 | [diff] [blame] | 105 | pr_err("zfcp: %s is not a valid SCSI device\n", devstr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | return 0; |
| 107 | } |
| 108 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 109 | static void __init zfcp_init_device_configure(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
| 111 | struct zfcp_adapter *adapter; |
| 112 | struct zfcp_port *port; |
| 113 | struct zfcp_unit *unit; |
| 114 | |
| 115 | down(&zfcp_data.config_sema); |
| 116 | read_lock_irq(&zfcp_data.config_lock); |
| 117 | adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid); |
| 118 | if (adapter) |
| 119 | zfcp_adapter_get(adapter); |
| 120 | read_unlock_irq(&zfcp_data.config_lock); |
| 121 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 122 | if (!adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | goto out_adapter; |
| 124 | port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 125 | if (IS_ERR(port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | goto out_port; |
| 127 | unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 128 | if (IS_ERR(unit)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | goto out_unit; |
| 130 | up(&zfcp_data.config_sema); |
| 131 | ccw_device_set_online(adapter->ccw_device); |
Swen Schillig | 091694a | 2008-10-01 12:42:25 +0200 | [diff] [blame] | 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | zfcp_erp_wait(adapter); |
Swen Schillig | 091694a | 2008-10-01 12:42:25 +0200 | [diff] [blame] | 134 | wait_event(adapter->erp_done_wqh, |
| 135 | !(atomic_read(&unit->status) & |
| 136 | ZFCP_STATUS_UNIT_SCSI_WORK_PENDING)); |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | down(&zfcp_data.config_sema); |
| 139 | zfcp_unit_put(unit); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 140 | out_unit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | zfcp_port_put(port); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 142 | out_port: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | zfcp_adapter_put(adapter); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 144 | out_adapter: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | up(&zfcp_data.config_sema); |
| 146 | return; |
| 147 | } |
| 148 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 149 | static struct kmem_cache *zfcp_cache_create(int size, char *name) |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 150 | { |
| 151 | int align = 1; |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 152 | while ((size - align) > 0) |
| 153 | align <<= 1; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 154 | return kmem_cache_create(name , size, align, 0, NULL); |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 155 | } |
| 156 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 157 | static int __init zfcp_module_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 159 | int retval = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 161 | zfcp_data.fsf_req_qtcb_cache = zfcp_cache_create( |
| 162 | sizeof(struct zfcp_fsf_req_qtcb), "zfcp_fsf"); |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 163 | if (!zfcp_data.fsf_req_qtcb_cache) |
| 164 | goto out; |
| 165 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 166 | zfcp_data.sr_buffer_cache = zfcp_cache_create( |
| 167 | sizeof(struct fsf_status_read_buffer), "zfcp_sr"); |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 168 | if (!zfcp_data.sr_buffer_cache) |
| 169 | goto out_sr_cache; |
| 170 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 171 | zfcp_data.gid_pn_cache = zfcp_cache_create( |
| 172 | sizeof(struct zfcp_gid_pn_data), "zfcp_gid"); |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 173 | if (!zfcp_data.gid_pn_cache) |
| 174 | goto out_gid_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Swen Schillig | b7f15f3 | 2008-10-01 12:42:22 +0200 | [diff] [blame] | 176 | zfcp_data.work_queue = create_singlethread_workqueue("zfcp_wq"); |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | INIT_LIST_HEAD(&zfcp_data.adapter_list_head); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 179 | sema_init(&zfcp_data.config_sema, 1); |
| 180 | rwlock_init(&zfcp_data.config_lock); |
| 181 | |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 182 | zfcp_data.scsi_transport_template = |
| 183 | fc_attach_transport(&zfcp_transport_functions); |
| 184 | if (!zfcp_data.scsi_transport_template) |
| 185 | goto out_transport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | retval = misc_register(&zfcp_cfdc_misc); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 188 | if (retval) { |
Christof Schmitt | ff3b24f | 2008-10-01 12:42:15 +0200 | [diff] [blame] | 189 | pr_err("zfcp: Registering the misc device zfcp_cfdc failed\n"); |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 190 | goto out_misc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | retval = zfcp_ccw_register(); |
| 194 | if (retval) { |
Christof Schmitt | ff3b24f | 2008-10-01 12:42:15 +0200 | [diff] [blame] | 195 | pr_err("zfcp: The zfcp device driver could not register with " |
| 196 | "the common I/O layer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | goto out_ccw_register; |
| 198 | } |
| 199 | |
| 200 | if (zfcp_device_setup(device)) |
| 201 | zfcp_init_device_configure(); |
| 202 | |
| 203 | goto out; |
| 204 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 205 | out_ccw_register: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | misc_deregister(&zfcp_cfdc_misc); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 207 | out_misc: |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 208 | fc_release_transport(zfcp_data.scsi_transport_template); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 209 | out_transport: |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 210 | kmem_cache_destroy(zfcp_data.gid_pn_cache); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 211 | out_gid_cache: |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 212 | kmem_cache_destroy(zfcp_data.sr_buffer_cache); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 213 | out_sr_cache: |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 214 | kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 215 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | return retval; |
| 217 | } |
| 218 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 219 | module_init(zfcp_module_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | /** |
| 222 | * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN |
| 223 | * @port: pointer to port to search for unit |
| 224 | * @fcp_lun: FCP LUN to search for |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 225 | * |
| 226 | * Returns: pointer to zfcp_unit or NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | */ |
Swen Schillig | 7ba58c9 | 2008-10-01 12:42:18 +0200 | [diff] [blame] | 228 | struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, u64 fcp_lun) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | struct zfcp_unit *unit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 232 | list_for_each_entry(unit, &port->unit_list_head, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if ((unit->fcp_lun == fcp_lun) && |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 234 | !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE)) |
| 235 | return unit; |
| 236 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | /** |
| 240 | * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn |
| 241 | * @adapter: pointer to adapter to search for port |
| 242 | * @wwpn: wwpn to search for |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 243 | * |
| 244 | * Returns: pointer to zfcp_port or NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | */ |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 246 | struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, |
Swen Schillig | 7ba58c9 | 2008-10-01 12:42:18 +0200 | [diff] [blame] | 247 | u64 wwpn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
| 249 | struct zfcp_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 251 | list_for_each_entry(port, &adapter->port_list_head, list) |
| 252 | if ((port->wwpn == wwpn) && !(atomic_read(&port->status) & |
| 253 | (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) |
| 254 | return port; |
| 255 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 258 | static void zfcp_sysfs_unit_release(struct device *dev) |
| 259 | { |
| 260 | kfree(container_of(dev, struct zfcp_unit, sysfs_device)); |
| 261 | } |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | /** |
| 264 | * zfcp_unit_enqueue - enqueue unit to unit list of a port. |
| 265 | * @port: pointer to port where unit is added |
| 266 | * @fcp_lun: FCP LUN of unit to be enqueued |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 267 | * Returns: pointer to enqueued unit on success, ERR_PTR on error |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | * Locks: config_sema must be held to serialize changes to the unit list |
| 269 | * |
| 270 | * Sets up some unit internal structures and creates sysfs entry. |
| 271 | */ |
Swen Schillig | 7ba58c9 | 2008-10-01 12:42:18 +0200 | [diff] [blame] | 272 | struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
Christof Schmitt | 462b785 | 2007-06-19 10:25:30 +0200 | [diff] [blame] | 274 | struct zfcp_unit *unit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 276 | unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | if (!unit) |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 278 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | atomic_set(&unit->refcount, 0); |
| 281 | init_waitqueue_head(&unit->remove_wq); |
| 282 | |
| 283 | unit->port = port; |
| 284 | unit->fcp_lun = fcp_lun; |
| 285 | |
Cornelia Huck | 1bf5b28 | 2008-10-10 21:33:10 +0200 | [diff] [blame] | 286 | dev_set_name(&unit->sysfs_device, "0x%016llx", |
| 287 | (unsigned long long) fcp_lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | unit->sysfs_device.parent = &port->sysfs_device; |
| 289 | unit->sysfs_device.release = zfcp_sysfs_unit_release; |
| 290 | dev_set_drvdata(&unit->sysfs_device, unit); |
| 291 | |
| 292 | /* mark unit unusable as long as sysfs registration is not complete */ |
| 293 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); |
| 294 | |
Christof Schmitt | c961585 | 2008-05-06 11:00:05 +0200 | [diff] [blame] | 295 | spin_lock_init(&unit->latencies.lock); |
| 296 | unit->latencies.write.channel.min = 0xFFFFFFFF; |
| 297 | unit->latencies.write.fabric.min = 0xFFFFFFFF; |
| 298 | unit->latencies.read.channel.min = 0xFFFFFFFF; |
| 299 | unit->latencies.read.fabric.min = 0xFFFFFFFF; |
| 300 | unit->latencies.cmd.channel.min = 0xFFFFFFFF; |
| 301 | unit->latencies.cmd.fabric.min = 0xFFFFFFFF; |
| 302 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 303 | read_lock_irq(&zfcp_data.config_lock); |
| 304 | if (zfcp_get_unit_by_lun(port, fcp_lun)) { |
| 305 | read_unlock_irq(&zfcp_data.config_lock); |
| 306 | goto err_out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 308 | read_unlock_irq(&zfcp_data.config_lock); |
| 309 | |
| 310 | if (device_register(&unit->sysfs_device)) |
| 311 | goto err_out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 313 | if (sysfs_create_group(&unit->sysfs_device.kobj, |
| 314 | &zfcp_sysfs_unit_attrs)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | device_unregister(&unit->sysfs_device); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 316 | return ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | zfcp_unit_get(unit); |
| 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | write_lock_irq(&zfcp_data.config_lock); |
Christof Schmitt | 462b785 | 2007-06-19 10:25:30 +0200 | [diff] [blame] | 322 | list_add_tail(&unit->list, &port->unit_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); |
| 324 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | write_unlock_irq(&zfcp_data.config_lock); |
| 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | zfcp_port_get(port); |
| 329 | |
| 330 | return unit; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 331 | |
| 332 | err_out_free: |
| 333 | kfree(unit); |
| 334 | return ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
| 336 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 337 | /** |
| 338 | * zfcp_unit_dequeue - dequeue unit |
| 339 | * @unit: pointer to zfcp_unit |
| 340 | * |
| 341 | * waits until all work is done on unit and removes it then from the unit->list |
| 342 | * of the associated port. |
| 343 | */ |
| 344 | void zfcp_unit_dequeue(struct zfcp_unit *unit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | { |
Swen Schillig | 44cc76f | 2008-10-01 12:42:16 +0200 | [diff] [blame] | 346 | wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | write_lock_irq(&zfcp_data.config_lock); |
| 348 | list_del(&unit->list); |
| 349 | write_unlock_irq(&zfcp_data.config_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | zfcp_port_put(unit->port); |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 351 | sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | device_unregister(&unit->sysfs_device); |
| 353 | } |
| 354 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 355 | static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 357 | /* must only be called with zfcp_data.config_sema taken */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | adapter->pool.fsf_req_erp = |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 359 | mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); |
Matthew Dobson | 0eaae62a | 2006-03-26 01:37:47 -0800 | [diff] [blame] | 360 | if (!adapter->pool.fsf_req_erp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | return -ENOMEM; |
| 362 | |
| 363 | adapter->pool.fsf_req_scsi = |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 364 | mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); |
Matthew Dobson | 0eaae62a | 2006-03-26 01:37:47 -0800 | [diff] [blame] | 365 | if (!adapter->pool.fsf_req_scsi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | return -ENOMEM; |
| 367 | |
| 368 | adapter->pool.fsf_req_abort = |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 369 | mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache); |
Matthew Dobson | 0eaae62a | 2006-03-26 01:37:47 -0800 | [diff] [blame] | 370 | if (!adapter->pool.fsf_req_abort) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return -ENOMEM; |
| 372 | |
| 373 | adapter->pool.fsf_req_status_read = |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 374 | mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM, |
Matthew Dobson | 0eaae62a | 2006-03-26 01:37:47 -0800 | [diff] [blame] | 375 | sizeof(struct zfcp_fsf_req)); |
| 376 | if (!adapter->pool.fsf_req_status_read) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | return -ENOMEM; |
| 378 | |
| 379 | adapter->pool.data_status_read = |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 380 | mempool_create_slab_pool(FSF_STATUS_READS_RECOM, |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 381 | zfcp_data.sr_buffer_cache); |
Matthew Dobson | 0eaae62a | 2006-03-26 01:37:47 -0800 | [diff] [blame] | 382 | if (!adapter->pool.data_status_read) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | return -ENOMEM; |
| 384 | |
| 385 | adapter->pool.data_gid_pn = |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 386 | mempool_create_slab_pool(1, zfcp_data.gid_pn_cache); |
Matthew Dobson | 0eaae62a | 2006-03-26 01:37:47 -0800 | [diff] [blame] | 387 | if (!adapter->pool.data_gid_pn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | return -ENOMEM; |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 393 | static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 395 | /* zfcp_data.config_sema must be held */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (adapter->pool.fsf_req_erp) |
| 397 | mempool_destroy(adapter->pool.fsf_req_erp); |
| 398 | if (adapter->pool.fsf_req_scsi) |
| 399 | mempool_destroy(adapter->pool.fsf_req_scsi); |
| 400 | if (adapter->pool.fsf_req_abort) |
| 401 | mempool_destroy(adapter->pool.fsf_req_abort); |
| 402 | if (adapter->pool.fsf_req_status_read) |
| 403 | mempool_destroy(adapter->pool.fsf_req_status_read); |
| 404 | if (adapter->pool.data_status_read) |
| 405 | mempool_destroy(adapter->pool.data_status_read); |
| 406 | if (adapter->pool.data_gid_pn) |
| 407 | mempool_destroy(adapter->pool.data_gid_pn); |
| 408 | } |
| 409 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 410 | /** |
| 411 | * zfcp_status_read_refill - refill the long running status_read_requests |
| 412 | * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled |
| 413 | * |
| 414 | * Returns: 0 on success, 1 otherwise |
| 415 | * |
| 416 | * if there are 16 or more status_read requests missing an adapter_reopen |
| 417 | * is triggered |
| 418 | */ |
Swen Schillig | d26ab06 | 2008-05-19 12:17:37 +0200 | [diff] [blame] | 419 | int zfcp_status_read_refill(struct zfcp_adapter *adapter) |
| 420 | { |
| 421 | while (atomic_read(&adapter->stat_miss) > 0) |
Swen Schillig | c41f8cb | 2008-07-02 10:56:39 +0200 | [diff] [blame] | 422 | if (zfcp_fsf_status_read(adapter)) { |
Swen Schillig | 7afe29f | 2008-07-02 10:56:33 +0200 | [diff] [blame] | 423 | if (atomic_read(&adapter->stat_miss) >= 16) { |
| 424 | zfcp_erp_adapter_reopen(adapter, 0, 103, NULL); |
| 425 | return 1; |
| 426 | } |
Swen Schillig | d26ab06 | 2008-05-19 12:17:37 +0200 | [diff] [blame] | 427 | break; |
Swen Schillig | 7afe29f | 2008-07-02 10:56:33 +0200 | [diff] [blame] | 428 | } else |
| 429 | atomic_dec(&adapter->stat_miss); |
Swen Schillig | d26ab06 | 2008-05-19 12:17:37 +0200 | [diff] [blame] | 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | static void _zfcp_status_read_scheduler(struct work_struct *work) |
| 434 | { |
| 435 | zfcp_status_read_refill(container_of(work, struct zfcp_adapter, |
| 436 | stat_work)); |
| 437 | } |
| 438 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 439 | /** |
| 440 | * zfcp_adapter_enqueue - enqueue a new adapter to the list |
| 441 | * @ccw_device: pointer to the struct cc_device |
| 442 | * |
| 443 | * Returns: 0 if a new adapter was successfully enqueued |
| 444 | * -ENOMEM if alloc failed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | * Enqueues an adapter at the end of the adapter list in the driver data. |
| 446 | * All adapter internal structures are set up. |
| 447 | * Proc-fs entries are also created. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | * locks: config_sema must be held to serialise changes to the adapter list |
| 449 | */ |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 450 | int zfcp_adapter_enqueue(struct ccw_device *ccw_device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | struct zfcp_adapter *adapter; |
| 453 | |
| 454 | /* |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 455 | * Note: It is safe to release the list_lock, as any list changes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | * are protected by the config_sema, which must be held to get here |
| 457 | */ |
| 458 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 459 | adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL); |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 460 | if (!adapter) |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 461 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | ccw_device->handler = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | adapter->ccw_device = ccw_device; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 465 | atomic_set(&adapter->refcount, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
Swen Schillig | 00bab91 | 2008-06-10 18:20:57 +0200 | [diff] [blame] | 467 | if (zfcp_qdio_allocate(adapter)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | goto qdio_allocate_failed; |
| 469 | |
Swen Schillig | 00bab91 | 2008-06-10 18:20:57 +0200 | [diff] [blame] | 470 | if (zfcp_allocate_low_mem_buffers(adapter)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | goto failed_low_mem_buffers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
Swen Schillig | 00bab91 | 2008-06-10 18:20:57 +0200 | [diff] [blame] | 473 | if (zfcp_reqlist_alloc(adapter)) |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 474 | goto failed_low_mem_buffers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 476 | if (zfcp_adapter_debug_register(adapter)) |
| 477 | goto debug_register_failed; |
| 478 | |
| 479 | init_waitqueue_head(&adapter->remove_wq); |
| 480 | init_waitqueue_head(&adapter->erp_thread_wqh); |
| 481 | init_waitqueue_head(&adapter->erp_done_wqh); |
| 482 | |
| 483 | INIT_LIST_HEAD(&adapter->port_list_head); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 484 | INIT_LIST_HEAD(&adapter->erp_ready_head); |
| 485 | INIT_LIST_HEAD(&adapter->erp_running_head); |
| 486 | |
| 487 | spin_lock_init(&adapter->req_list_lock); |
Heiko Carstens | c48a29d | 2005-12-01 02:46:32 +0100 | [diff] [blame] | 488 | |
Heiko Carstens | c48a29d | 2005-12-01 02:46:32 +0100 | [diff] [blame] | 489 | spin_lock_init(&adapter->hba_dbf_lock); |
| 490 | spin_lock_init(&adapter->san_dbf_lock); |
| 491 | spin_lock_init(&adapter->scsi_dbf_lock); |
Martin Peschke | d79a83d | 2008-03-27 14:22:00 +0100 | [diff] [blame] | 492 | spin_lock_init(&adapter->rec_dbf_lock); |
Christof Schmitt | 0406289 | 2008-10-01 12:42:20 +0200 | [diff] [blame] | 493 | spin_lock_init(&adapter->req_q_lock); |
Heiko Carstens | c48a29d | 2005-12-01 02:46:32 +0100 | [diff] [blame] | 494 | |
Heiko Carstens | c48a29d | 2005-12-01 02:46:32 +0100 | [diff] [blame] | 495 | rwlock_init(&adapter->erp_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | rwlock_init(&adapter->abort_lock); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 497 | |
| 498 | sema_init(&adapter->erp_ready_sem, 0); |
| 499 | |
Swen Schillig | d26ab06 | 2008-05-19 12:17:37 +0200 | [diff] [blame] | 500 | INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); |
Swen Schillig | cc8c282 | 2008-06-10 18:21:00 +0200 | [diff] [blame] | 501 | INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | /* mark adapter unusable as long as sysfs registration is not complete */ |
| 504 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | dev_set_drvdata(&ccw_device->dev, adapter); |
| 507 | |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 508 | if (sysfs_create_group(&ccw_device->dev.kobj, |
| 509 | &zfcp_sysfs_adapter_attrs)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | goto sysfs_failed; |
| 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | write_lock_irq(&zfcp_data.config_lock); |
| 513 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); |
| 514 | list_add_tail(&adapter->list, &zfcp_data.adapter_list_head); |
| 515 | write_unlock_irq(&zfcp_data.config_lock); |
| 516 | |
Swen Schillig | 5ab944f | 2008-10-01 12:42:17 +0200 | [diff] [blame] | 517 | zfcp_fc_nameserver_init(adapter); |
Swen Schillig | cc8c282 | 2008-06-10 18:21:00 +0200 | [diff] [blame] | 518 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 519 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 521 | sysfs_failed: |
Christof Schmitt | ff17a29 | 2007-08-28 09:31:41 +0200 | [diff] [blame] | 522 | zfcp_adapter_debug_unregister(adapter); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 523 | debug_register_failed: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | dev_set_drvdata(&ccw_device->dev, NULL); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 525 | kfree(adapter->req_list); |
| 526 | failed_low_mem_buffers: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | zfcp_free_low_mem_buffers(adapter); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 528 | qdio_allocate_failed: |
Swen Schillig | 00bab91 | 2008-06-10 18:20:57 +0200 | [diff] [blame] | 529 | zfcp_qdio_free(adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | kfree(adapter); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 531 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | } |
| 533 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 534 | /** |
| 535 | * zfcp_adapter_dequeue - remove the adapter from the resource list |
| 536 | * @adapter: pointer to struct zfcp_adapter which should be removed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | * locks: adapter list write lock is assumed to be held by caller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | */ |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 539 | void zfcp_adapter_dequeue(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | { |
| 541 | int retval = 0; |
| 542 | unsigned long flags; |
| 543 | |
Swen Schillig | cc8c282 | 2008-06-10 18:21:00 +0200 | [diff] [blame] | 544 | cancel_work_sync(&adapter->scan_work); |
Swen Schillig | d26ab06 | 2008-05-19 12:17:37 +0200 | [diff] [blame] | 545 | cancel_work_sync(&adapter->stat_work); |
Michael Loehr | 9f28745 | 2007-05-09 11:01:24 +0200 | [diff] [blame] | 546 | zfcp_adapter_scsi_unregister(adapter); |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 547 | sysfs_remove_group(&adapter->ccw_device->dev.kobj, |
| 548 | &zfcp_sysfs_adapter_attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | dev_set_drvdata(&adapter->ccw_device->dev, NULL); |
| 550 | /* sanity check: no pending FSF requests */ |
Volker Sameske | fea9d6c | 2006-08-02 11:05:16 +0200 | [diff] [blame] | 551 | spin_lock_irqsave(&adapter->req_list_lock, flags); |
| 552 | retval = zfcp_reqlist_isempty(adapter); |
| 553 | spin_unlock_irqrestore(&adapter->req_list_lock, flags); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 554 | if (!retval) |
| 555 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
Christof Schmitt | ff17a29 | 2007-08-28 09:31:41 +0200 | [diff] [blame] | 557 | zfcp_adapter_debug_unregister(adapter); |
| 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | /* remove specified adapter data structure from list */ |
| 560 | write_lock_irq(&zfcp_data.config_lock); |
| 561 | list_del(&adapter->list); |
| 562 | write_unlock_irq(&zfcp_data.config_lock); |
| 563 | |
Swen Schillig | 00bab91 | 2008-06-10 18:20:57 +0200 | [diff] [blame] | 564 | zfcp_qdio_free(adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | zfcp_free_low_mem_buffers(adapter); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 567 | kfree(adapter->req_list); |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 568 | kfree(adapter->fc_stats); |
| 569 | kfree(adapter->stats_reset_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | kfree(adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 573 | static void zfcp_sysfs_port_release(struct device *dev) |
| 574 | { |
| 575 | kfree(container_of(dev, struct zfcp_port, sysfs_device)); |
| 576 | } |
| 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | /** |
| 579 | * zfcp_port_enqueue - enqueue port to port list of adapter |
| 580 | * @adapter: adapter where remote port is added |
| 581 | * @wwpn: WWPN of the remote port to be enqueued |
| 582 | * @status: initial status for the port |
| 583 | * @d_id: destination id of the remote port to be enqueued |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 584 | * Returns: pointer to enqueued port on success, ERR_PTR on error |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | * Locks: config_sema must be held to serialize changes to the port list |
| 586 | * |
| 587 | * All port internal structures are set up and the sysfs entry is generated. |
| 588 | * d_id is used to enqueue ports with a well known address like the Directory |
| 589 | * Service for nameserver lookup. |
| 590 | */ |
Swen Schillig | 7ba58c9 | 2008-10-01 12:42:18 +0200 | [diff] [blame] | 591 | struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn, |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 592 | u32 status, u32 d_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 594 | struct zfcp_port *port; |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 595 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 597 | port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | if (!port) |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 599 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | init_waitqueue_head(&port->remove_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | INIT_LIST_HEAD(&port->unit_list_head); |
Swen Schillig | 5ab944f | 2008-10-01 12:42:17 +0200 | [diff] [blame] | 603 | INIT_WORK(&port->gid_pn_work, zfcp_erp_port_strategy_open_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
| 605 | port->adapter = adapter; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 606 | port->d_id = d_id; |
| 607 | port->wwpn = wwpn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 609 | /* mark port unusable as long as sysfs registration is not complete */ |
| 610 | atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status); |
| 611 | atomic_set(&port->refcount, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Cornelia Huck | 1bf5b28 | 2008-10-10 21:33:10 +0200 | [diff] [blame] | 613 | dev_set_name(&port->sysfs_device, "0x%016llx", wwpn); |
Swen Schillig | 5ab944f | 2008-10-01 12:42:17 +0200 | [diff] [blame] | 614 | port->sysfs_device.parent = &adapter->ccw_device->dev; |
Swen Schillig | cc8c282 | 2008-06-10 18:21:00 +0200 | [diff] [blame] | 615 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | port->sysfs_device.release = zfcp_sysfs_port_release; |
| 617 | dev_set_drvdata(&port->sysfs_device, port); |
| 618 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 619 | read_lock_irq(&zfcp_data.config_lock); |
| 620 | if (!(status & ZFCP_STATUS_PORT_NO_WWPN)) |
| 621 | if (zfcp_get_port_by_wwpn(adapter, wwpn)) { |
| 622 | read_unlock_irq(&zfcp_data.config_lock); |
| 623 | goto err_out_free; |
| 624 | } |
| 625 | read_unlock_irq(&zfcp_data.config_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 627 | if (device_register(&port->sysfs_device)) |
| 628 | goto err_out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | |
Swen Schillig | 5ab944f | 2008-10-01 12:42:17 +0200 | [diff] [blame] | 630 | retval = sysfs_create_group(&port->sysfs_device.kobj, |
| 631 | &zfcp_sysfs_port_attrs); |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 632 | |
| 633 | if (retval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | device_unregister(&port->sysfs_device); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 635 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | zfcp_port_get(port); |
| 639 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | write_lock_irq(&zfcp_data.config_lock); |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 641 | list_add_tail(&port->list, &adapter->port_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); |
| 643 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status); |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | write_unlock_irq(&zfcp_data.config_lock); |
| 646 | |
| 647 | zfcp_adapter_get(adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | return port; |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 649 | |
| 650 | err_out_free: |
| 651 | kfree(port); |
| 652 | err_out: |
| 653 | return ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
| 655 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 656 | /** |
| 657 | * zfcp_port_dequeue - dequeues a port from the port list of the adapter |
| 658 | * @port: pointer to struct zfcp_port which should be removed |
| 659 | */ |
| 660 | void zfcp_port_dequeue(struct zfcp_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
Swen Schillig | 44cc76f | 2008-10-01 12:42:16 +0200 | [diff] [blame] | 662 | wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | write_lock_irq(&zfcp_data.config_lock); |
| 664 | list_del(&port->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | write_unlock_irq(&zfcp_data.config_lock); |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 666 | if (port->rport) |
Heiko Carstens | 20b1730 | 2005-08-28 13:22:37 -0700 | [diff] [blame] | 667 | fc_remote_port_delete(port->rport); |
| 668 | port->rport = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | zfcp_adapter_put(port->adapter); |
Swen Schillig | 5ab944f | 2008-10-01 12:42:17 +0200 | [diff] [blame] | 670 | sysfs_remove_group(&port->sysfs_device.kobj, &zfcp_sysfs_port_attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | device_unregister(&port->sysfs_device); |
| 672 | } |
| 673 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 674 | /** |
| 675 | * zfcp_sg_free_table - free memory used by scatterlists |
| 676 | * @sg: pointer to scatterlist |
| 677 | * @count: number of scatterlist which are to be free'ed |
| 678 | * the scatterlist are expected to reference pages always |
| 679 | */ |
Christof Schmitt | 45633fd | 2008-06-10 18:20:55 +0200 | [diff] [blame] | 680 | void zfcp_sg_free_table(struct scatterlist *sg, int count) |
| 681 | { |
| 682 | int i; |
| 683 | |
| 684 | for (i = 0; i < count; i++, sg++) |
| 685 | if (sg) |
| 686 | free_page((unsigned long) sg_virt(sg)); |
| 687 | else |
| 688 | break; |
| 689 | } |
| 690 | |
Swen Schillig | 317e6b6 | 2008-07-02 10:56:37 +0200 | [diff] [blame] | 691 | /** |
| 692 | * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers |
| 693 | * @sg: pointer to struct scatterlist |
| 694 | * @count: number of scatterlists which should be assigned with buffers |
| 695 | * of size page |
| 696 | * |
| 697 | * Returns: 0 on success, -ENOMEM otherwise |
| 698 | */ |
Christof Schmitt | 45633fd | 2008-06-10 18:20:55 +0200 | [diff] [blame] | 699 | int zfcp_sg_setup_table(struct scatterlist *sg, int count) |
| 700 | { |
| 701 | void *addr; |
| 702 | int i; |
| 703 | |
| 704 | sg_init_table(sg, count); |
| 705 | for (i = 0; i < count; i++, sg++) { |
| 706 | addr = (void *) get_zeroed_page(GFP_KERNEL); |
| 707 | if (!addr) { |
| 708 | zfcp_sg_free_table(sg, i); |
| 709 | return -ENOMEM; |
| 710 | } |
| 711 | sg_set_buf(sg, addr, PAGE_SIZE); |
| 712 | } |
| 713 | return 0; |
| 714 | } |