Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1 | /* |
| 2 | * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter |
| 3 | * |
| 4 | * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation |
| 5 | * |
| 6 | * Copyright (C) IBM Corporation, 2008 |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/moduleparam.h> |
| 26 | #include <linux/dma-mapping.h> |
| 27 | #include <linux/dmapool.h> |
| 28 | #include <linux/delay.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/kthread.h> |
| 31 | #include <linux/of.h> |
| 32 | #include <linux/stringify.h> |
| 33 | #include <asm/firmware.h> |
| 34 | #include <asm/irq.h> |
| 35 | #include <asm/vio.h> |
| 36 | #include <scsi/scsi.h> |
| 37 | #include <scsi/scsi_cmnd.h> |
| 38 | #include <scsi/scsi_host.h> |
| 39 | #include <scsi/scsi_device.h> |
| 40 | #include <scsi/scsi_tcq.h> |
| 41 | #include <scsi/scsi_transport_fc.h> |
| 42 | #include "ibmvfc.h" |
| 43 | |
| 44 | static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; |
| 45 | static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; |
| 46 | static unsigned int max_lun = IBMVFC_MAX_LUN; |
| 47 | static unsigned int max_targets = IBMVFC_MAX_TARGETS; |
| 48 | static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; |
| 49 | static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; |
| 50 | static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; |
| 51 | static unsigned int ibmvfc_debug = IBMVFC_DEBUG; |
| 52 | static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; |
| 53 | static LIST_HEAD(ibmvfc_head); |
| 54 | static DEFINE_SPINLOCK(ibmvfc_driver_lock); |
| 55 | static struct scsi_transport_template *ibmvfc_transport_template; |
| 56 | |
| 57 | MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); |
| 58 | MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); |
| 59 | MODULE_LICENSE("GPL"); |
| 60 | MODULE_VERSION(IBMVFC_DRIVER_VERSION); |
| 61 | |
| 62 | module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); |
| 63 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " |
| 64 | "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); |
| 65 | module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); |
| 66 | MODULE_PARM_DESC(default_timeout, |
| 67 | "Default timeout in seconds for initialization and EH commands. " |
| 68 | "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); |
| 69 | module_param_named(max_requests, max_requests, uint, S_IRUGO); |
| 70 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " |
| 71 | "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); |
| 72 | module_param_named(max_lun, max_lun, uint, S_IRUGO); |
| 73 | MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " |
| 74 | "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); |
| 75 | module_param_named(max_targets, max_targets, uint, S_IRUGO); |
| 76 | MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " |
| 77 | "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); |
| 78 | module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); |
| 79 | MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
| 80 | "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); |
| 81 | module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); |
| 82 | MODULE_PARM_DESC(debug, "Enable driver debug information. " |
| 83 | "[Default=" __stringify(IBMVFC_DEBUG) "]"); |
| 84 | module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); |
| 85 | MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " |
| 86 | "transport should insulate the loss of a remote port. Once this " |
| 87 | "value is exceeded, the scsi target is removed. " |
| 88 | "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); |
| 89 | module_param_named(log_level, log_level, uint, 0); |
| 90 | MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " |
| 91 | "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); |
| 92 | |
| 93 | static const struct { |
| 94 | u16 status; |
| 95 | u16 error; |
| 96 | u8 result; |
| 97 | u8 retry; |
| 98 | int log; |
| 99 | char *name; |
| 100 | } cmd_status [] = { |
| 101 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, |
| 102 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, |
| 103 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, |
| 104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" }, |
| 105 | { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
| 106 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, |
| 107 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, |
| 108 | { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, |
| 109 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, |
| 110 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, |
| 111 | { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, |
| 112 | { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, |
| 113 | { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, |
| 114 | { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
| 115 | |
| 116 | { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, |
| 117 | { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, |
| 118 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" }, |
| 119 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" }, |
| 120 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
| 121 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" }, |
| 122 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" }, |
| 123 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
| 124 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
| 125 | |
| 126 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, |
| 127 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, |
| 128 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, |
| 129 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, |
| 130 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, |
| 131 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, |
| 132 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, |
| 133 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, |
| 134 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, |
| 135 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, |
| 136 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, |
| 137 | |
| 138 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, |
| 139 | }; |
| 140 | |
| 141 | static void ibmvfc_npiv_login(struct ibmvfc_host *); |
| 142 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); |
| 143 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); |
| 144 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); |
| 145 | |
| 146 | static const char *unknown_error = "unknown error"; |
| 147 | |
| 148 | #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| 149 | /** |
| 150 | * ibmvfc_trc_start - Log a start trace entry |
| 151 | * @evt: ibmvfc event struct |
| 152 | * |
| 153 | **/ |
| 154 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) |
| 155 | { |
| 156 | struct ibmvfc_host *vhost = evt->vhost; |
| 157 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; |
| 158 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; |
| 159 | struct ibmvfc_trace_entry *entry; |
| 160 | |
| 161 | entry = &vhost->trace[vhost->trace_index++]; |
| 162 | entry->evt = evt; |
| 163 | entry->time = jiffies; |
| 164 | entry->fmt = evt->crq.format; |
| 165 | entry->type = IBMVFC_TRC_START; |
| 166 | |
| 167 | switch (entry->fmt) { |
| 168 | case IBMVFC_CMD_FORMAT: |
| 169 | entry->op_code = vfc_cmd->iu.cdb[0]; |
| 170 | entry->scsi_id = vfc_cmd->tgt_scsi_id; |
| 171 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
| 172 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; |
| 173 | entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; |
| 174 | break; |
| 175 | case IBMVFC_MAD_FORMAT: |
| 176 | entry->op_code = mad->opcode; |
| 177 | break; |
| 178 | default: |
| 179 | break; |
| 180 | }; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * ibmvfc_trc_end - Log an end trace entry |
| 185 | * @evt: ibmvfc event struct |
| 186 | * |
| 187 | **/ |
| 188 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) |
| 189 | { |
| 190 | struct ibmvfc_host *vhost = evt->vhost; |
| 191 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 192 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; |
| 193 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; |
| 194 | |
| 195 | entry->evt = evt; |
| 196 | entry->time = jiffies; |
| 197 | entry->fmt = evt->crq.format; |
| 198 | entry->type = IBMVFC_TRC_END; |
| 199 | |
| 200 | switch (entry->fmt) { |
| 201 | case IBMVFC_CMD_FORMAT: |
| 202 | entry->op_code = vfc_cmd->iu.cdb[0]; |
| 203 | entry->scsi_id = vfc_cmd->tgt_scsi_id; |
| 204 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
| 205 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; |
| 206 | entry->u.end.status = vfc_cmd->status; |
| 207 | entry->u.end.error = vfc_cmd->error; |
| 208 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; |
| 209 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; |
| 210 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; |
| 211 | break; |
| 212 | case IBMVFC_MAD_FORMAT: |
| 213 | entry->op_code = mad->opcode; |
| 214 | entry->u.end.status = mad->status; |
| 215 | break; |
| 216 | default: |
| 217 | break; |
| 218 | |
| 219 | }; |
| 220 | } |
| 221 | |
| 222 | #else |
| 223 | #define ibmvfc_trc_start(evt) do { } while (0) |
| 224 | #define ibmvfc_trc_end(evt) do { } while (0) |
| 225 | #endif |
| 226 | |
| 227 | /** |
| 228 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response |
| 229 | * @status: status / error class |
| 230 | * @error: error |
| 231 | * |
| 232 | * Return value: |
| 233 | * index into cmd_status / -EINVAL on failure |
| 234 | **/ |
| 235 | static int ibmvfc_get_err_index(u16 status, u16 error) |
| 236 | { |
| 237 | int i; |
| 238 | |
| 239 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) |
| 240 | if ((cmd_status[i].status & status) == cmd_status[i].status && |
| 241 | cmd_status[i].error == error) |
| 242 | return i; |
| 243 | |
| 244 | return -EINVAL; |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * ibmvfc_get_cmd_error - Find the error description for the fcp response |
| 249 | * @status: status / error class |
| 250 | * @error: error |
| 251 | * |
| 252 | * Return value: |
| 253 | * error description string |
| 254 | **/ |
| 255 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) |
| 256 | { |
| 257 | int rc = ibmvfc_get_err_index(status, error); |
| 258 | if (rc >= 0) |
| 259 | return cmd_status[rc].name; |
| 260 | return unknown_error; |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response |
| 265 | * @vfc_cmd: ibmvfc command struct |
| 266 | * |
| 267 | * Return value: |
| 268 | * SCSI result value to return for completed command |
| 269 | **/ |
| 270 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) |
| 271 | { |
| 272 | int err; |
| 273 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 274 | int fc_rsp_len = rsp->fcp_rsp_len; |
| 275 | |
| 276 | if ((rsp->flags & FCP_RSP_LEN_VALID) && |
| 277 | ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
| 278 | rsp->data.info.rsp_code)) |
| 279 | return DID_ERROR << 16; |
| 280 | |
| 281 | if (!vfc_cmd->status) { |
| 282 | if (rsp->flags & FCP_RESID_OVER) |
| 283 | return rsp->scsi_status | (DID_ERROR << 16); |
| 284 | else |
| 285 | return rsp->scsi_status | (DID_OK << 16); |
| 286 | } |
| 287 | |
| 288 | err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| 289 | if (err >= 0) |
| 290 | return rsp->scsi_status | (cmd_status[err].result << 16); |
| 291 | return rsp->scsi_status | (DID_ERROR << 16); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * ibmvfc_retry_cmd - Determine if error status is retryable |
| 296 | * @status: status / error class |
| 297 | * @error: error |
| 298 | * |
| 299 | * Return value: |
| 300 | * 1 if error should be retried / 0 if it should not |
| 301 | **/ |
| 302 | static int ibmvfc_retry_cmd(u16 status, u16 error) |
| 303 | { |
| 304 | int rc = ibmvfc_get_err_index(status, error); |
| 305 | |
| 306 | if (rc >= 0) |
| 307 | return cmd_status[rc].retry; |
| 308 | return 1; |
| 309 | } |
| 310 | |
| 311 | static const char *unknown_fc_explain = "unknown fc explain"; |
| 312 | |
| 313 | static const struct { |
| 314 | u16 fc_explain; |
| 315 | char *name; |
| 316 | } ls_explain [] = { |
| 317 | { 0x00, "no additional explanation" }, |
| 318 | { 0x01, "service parameter error - options" }, |
| 319 | { 0x03, "service parameter error - initiator control" }, |
| 320 | { 0x05, "service parameter error - recipient control" }, |
| 321 | { 0x07, "service parameter error - received data field size" }, |
| 322 | { 0x09, "service parameter error - concurrent seq" }, |
| 323 | { 0x0B, "service parameter error - credit" }, |
| 324 | { 0x0D, "invalid N_Port/F_Port_Name" }, |
| 325 | { 0x0E, "invalid node/Fabric Name" }, |
| 326 | { 0x0F, "invalid common service parameters" }, |
| 327 | { 0x11, "invalid association header" }, |
| 328 | { 0x13, "association header required" }, |
| 329 | { 0x15, "invalid originator S_ID" }, |
| 330 | { 0x17, "invalid OX_ID-RX-ID combination" }, |
| 331 | { 0x19, "command (request) already in progress" }, |
| 332 | { 0x1E, "N_Port Login requested" }, |
| 333 | { 0x1F, "Invalid N_Port_ID" }, |
| 334 | }; |
| 335 | |
| 336 | static const struct { |
| 337 | u16 fc_explain; |
| 338 | char *name; |
| 339 | } gs_explain [] = { |
| 340 | { 0x00, "no additional explanation" }, |
| 341 | { 0x01, "port identifier not registered" }, |
| 342 | { 0x02, "port name not registered" }, |
| 343 | { 0x03, "node name not registered" }, |
| 344 | { 0x04, "class of service not registered" }, |
| 345 | { 0x06, "initial process associator not registered" }, |
| 346 | { 0x07, "FC-4 TYPEs not registered" }, |
| 347 | { 0x08, "symbolic port name not registered" }, |
| 348 | { 0x09, "symbolic node name not registered" }, |
| 349 | { 0x0A, "port type not registered" }, |
| 350 | { 0xF0, "authorization exception" }, |
| 351 | { 0xF1, "authentication exception" }, |
| 352 | { 0xF2, "data base full" }, |
| 353 | { 0xF3, "data base empty" }, |
| 354 | { 0xF4, "processing request" }, |
| 355 | { 0xF5, "unable to verify connection" }, |
| 356 | { 0xF6, "devices not in a common zone" }, |
| 357 | }; |
| 358 | |
| 359 | /** |
| 360 | * ibmvfc_get_ls_explain - Return the FC Explain description text |
| 361 | * @status: FC Explain status |
| 362 | * |
| 363 | * Returns: |
| 364 | * error string |
| 365 | **/ |
| 366 | static const char *ibmvfc_get_ls_explain(u16 status) |
| 367 | { |
| 368 | int i; |
| 369 | |
| 370 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) |
| 371 | if (ls_explain[i].fc_explain == status) |
| 372 | return ls_explain[i].name; |
| 373 | |
| 374 | return unknown_fc_explain; |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * ibmvfc_get_gs_explain - Return the FC Explain description text |
| 379 | * @status: FC Explain status |
| 380 | * |
| 381 | * Returns: |
| 382 | * error string |
| 383 | **/ |
| 384 | static const char *ibmvfc_get_gs_explain(u16 status) |
| 385 | { |
| 386 | int i; |
| 387 | |
| 388 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) |
| 389 | if (gs_explain[i].fc_explain == status) |
| 390 | return gs_explain[i].name; |
| 391 | |
| 392 | return unknown_fc_explain; |
| 393 | } |
| 394 | |
| 395 | static const struct { |
| 396 | enum ibmvfc_fc_type fc_type; |
| 397 | char *name; |
| 398 | } fc_type [] = { |
| 399 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, |
| 400 | { IBMVFC_PORT_REJECT, "port reject" }, |
| 401 | { IBMVFC_LS_REJECT, "ELS reject" }, |
| 402 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, |
| 403 | { IBMVFC_PORT_BUSY, "port busy" }, |
| 404 | { IBMVFC_BASIC_REJECT, "basic reject" }, |
| 405 | }; |
| 406 | |
| 407 | static const char *unknown_fc_type = "unknown fc type"; |
| 408 | |
| 409 | /** |
| 410 | * ibmvfc_get_fc_type - Return the FC Type description text |
| 411 | * @status: FC Type error status |
| 412 | * |
| 413 | * Returns: |
| 414 | * error string |
| 415 | **/ |
| 416 | static const char *ibmvfc_get_fc_type(u16 status) |
| 417 | { |
| 418 | int i; |
| 419 | |
| 420 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) |
| 421 | if (fc_type[i].fc_type == status) |
| 422 | return fc_type[i].name; |
| 423 | |
| 424 | return unknown_fc_type; |
| 425 | } |
| 426 | |
| 427 | /** |
| 428 | * ibmvfc_set_tgt_action - Set the next init action for the target |
| 429 | * @tgt: ibmvfc target struct |
| 430 | * @action: action to perform |
| 431 | * |
| 432 | **/ |
| 433 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, |
| 434 | enum ibmvfc_target_action action) |
| 435 | { |
| 436 | switch (tgt->action) { |
| 437 | case IBMVFC_TGT_ACTION_DEL_RPORT: |
| 438 | break; |
| 439 | default: |
| 440 | tgt->action = action; |
| 441 | break; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | /** |
| 446 | * ibmvfc_set_host_state - Set the state for the host |
| 447 | * @vhost: ibmvfc host struct |
| 448 | * @state: state to set host to |
| 449 | * |
| 450 | * Returns: |
| 451 | * 0 if state changed / non-zero if not changed |
| 452 | **/ |
| 453 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, |
| 454 | enum ibmvfc_host_state state) |
| 455 | { |
| 456 | int rc = 0; |
| 457 | |
| 458 | switch (vhost->state) { |
| 459 | case IBMVFC_HOST_OFFLINE: |
| 460 | rc = -EINVAL; |
| 461 | break; |
| 462 | default: |
| 463 | vhost->state = state; |
| 464 | break; |
| 465 | }; |
| 466 | |
| 467 | return rc; |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * ibmvfc_set_host_action - Set the next init action for the host |
| 472 | * @vhost: ibmvfc host struct |
| 473 | * @action: action to perform |
| 474 | * |
| 475 | **/ |
| 476 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, |
| 477 | enum ibmvfc_host_action action) |
| 478 | { |
| 479 | switch (action) { |
| 480 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 481 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) |
| 482 | vhost->action = action; |
| 483 | break; |
| 484 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 485 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) |
| 486 | vhost->action = action; |
| 487 | break; |
| 488 | case IBMVFC_HOST_ACTION_QUERY: |
| 489 | switch (vhost->action) { |
| 490 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 491 | case IBMVFC_HOST_ACTION_NONE: |
| 492 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 493 | vhost->action = action; |
| 494 | break; |
| 495 | default: |
| 496 | break; |
| 497 | }; |
| 498 | break; |
| 499 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 500 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) |
| 501 | vhost->action = action; |
| 502 | break; |
| 503 | case IBMVFC_HOST_ACTION_INIT: |
| 504 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 505 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 506 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 507 | case IBMVFC_HOST_ACTION_NONE: |
| 508 | default: |
| 509 | vhost->action = action; |
| 510 | break; |
| 511 | }; |
| 512 | } |
| 513 | |
| 514 | /** |
| 515 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) |
| 516 | * @vhost: ibmvfc host struct |
| 517 | * |
| 518 | * Return value: |
| 519 | * nothing |
| 520 | **/ |
| 521 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) |
| 522 | { |
| 523 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { |
Brian King | 2d0da2a | 2008-07-22 08:31:42 -0500 | [diff] [blame] | 524 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| 525 | scsi_block_requests(vhost->host); |
| 526 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 527 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 528 | } else |
| 529 | vhost->reinit = 1; |
| 530 | |
| 531 | wake_up(&vhost->work_wait_q); |
| 532 | } |
| 533 | |
| 534 | /** |
| 535 | * ibmvfc_link_down - Handle a link down event from the adapter |
| 536 | * @vhost: ibmvfc host struct |
| 537 | * @state: ibmvfc host state to enter |
| 538 | * |
| 539 | **/ |
| 540 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, |
| 541 | enum ibmvfc_host_state state) |
| 542 | { |
| 543 | struct ibmvfc_target *tgt; |
| 544 | |
| 545 | ENTER; |
| 546 | scsi_block_requests(vhost->host); |
| 547 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 548 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 549 | ibmvfc_set_host_state(vhost, state); |
| 550 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| 551 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; |
| 552 | wake_up(&vhost->work_wait_q); |
| 553 | LEAVE; |
| 554 | } |
| 555 | |
| 556 | /** |
| 557 | * ibmvfc_init_host - Start host initialization |
| 558 | * @vhost: ibmvfc host struct |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 559 | * @relogin: is this a re-login? |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 560 | * |
| 561 | * Return value: |
| 562 | * nothing |
| 563 | **/ |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 564 | static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 565 | { |
| 566 | struct ibmvfc_target *tgt; |
| 567 | |
| 568 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| 569 | if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| 570 | dev_err(vhost->dev, |
| 571 | "Host initialization retries exceeded. Taking adapter offline\n"); |
| 572 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 573 | return; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 578 | if (!relogin) { |
| 579 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
| 580 | vhost->async_crq.cur = 0; |
| 581 | } |
| 582 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 583 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 584 | tgt->need_login = 1; |
| 585 | scsi_block_requests(vhost->host); |
| 586 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 587 | vhost->job_step = ibmvfc_npiv_login; |
| 588 | wake_up(&vhost->work_wait_q); |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | /** |
| 593 | * ibmvfc_send_crq - Send a CRQ |
| 594 | * @vhost: ibmvfc host struct |
| 595 | * @word1: the first 64 bits of the data |
| 596 | * @word2: the second 64 bits of the data |
| 597 | * |
| 598 | * Return value: |
| 599 | * 0 on success / other on failure |
| 600 | **/ |
| 601 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) |
| 602 | { |
| 603 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 604 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); |
| 605 | } |
| 606 | |
| 607 | /** |
| 608 | * ibmvfc_send_crq_init - Send a CRQ init message |
| 609 | * @vhost: ibmvfc host struct |
| 610 | * |
| 611 | * Return value: |
| 612 | * 0 on success / other on failure |
| 613 | **/ |
| 614 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) |
| 615 | { |
| 616 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); |
| 617 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); |
| 618 | } |
| 619 | |
| 620 | /** |
| 621 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message |
| 622 | * @vhost: ibmvfc host struct |
| 623 | * |
| 624 | * Return value: |
| 625 | * 0 on success / other on failure |
| 626 | **/ |
| 627 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) |
| 628 | { |
| 629 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); |
| 630 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ |
| 635 | * @vhost: ibmvfc host struct |
| 636 | * |
| 637 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters |
| 638 | * the crq with the hypervisor. |
| 639 | **/ |
| 640 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) |
| 641 | { |
| 642 | long rc; |
| 643 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 644 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 645 | |
| 646 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); |
| 647 | free_irq(vdev->irq, vhost); |
| 648 | do { |
| 649 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 650 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 651 | |
| 652 | vhost->state = IBMVFC_NO_CRQ; |
| 653 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 654 | free_page((unsigned long)crq->msgs); |
| 655 | } |
| 656 | |
| 657 | /** |
| 658 | * ibmvfc_reenable_crq_queue - reenables the CRQ |
| 659 | * @vhost: ibmvfc host struct |
| 660 | * |
| 661 | * Return value: |
| 662 | * 0 on success / other on failure |
| 663 | **/ |
| 664 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) |
| 665 | { |
| 666 | int rc; |
| 667 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 668 | |
| 669 | /* Re-enable the CRQ */ |
| 670 | do { |
| 671 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
| 672 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 673 | |
| 674 | if (rc) |
| 675 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); |
| 676 | |
| 677 | return rc; |
| 678 | } |
| 679 | |
| 680 | /** |
| 681 | * ibmvfc_reset_crq - resets a crq after a failure |
| 682 | * @vhost: ibmvfc host struct |
| 683 | * |
| 684 | * Return value: |
| 685 | * 0 on success / other on failure |
| 686 | **/ |
| 687 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) |
| 688 | { |
| 689 | int rc; |
| 690 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 691 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 692 | |
| 693 | /* Close the CRQ */ |
| 694 | do { |
| 695 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 696 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 697 | |
| 698 | vhost->state = IBMVFC_NO_CRQ; |
| 699 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 700 | |
| 701 | /* Clean out the queue */ |
| 702 | memset(crq->msgs, 0, PAGE_SIZE); |
| 703 | crq->cur = 0; |
| 704 | |
| 705 | /* And re-open it again */ |
| 706 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| 707 | crq->msg_token, PAGE_SIZE); |
| 708 | |
| 709 | if (rc == H_CLOSED) |
| 710 | /* Adapter is good, but other end is not ready */ |
| 711 | dev_warn(vhost->dev, "Partner adapter not ready\n"); |
| 712 | else if (rc != 0) |
| 713 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); |
| 714 | |
| 715 | return rc; |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * ibmvfc_valid_event - Determines if event is valid. |
| 720 | * @pool: event_pool that contains the event |
| 721 | * @evt: ibmvfc event to be checked for validity |
| 722 | * |
| 723 | * Return value: |
| 724 | * 1 if event is valid / 0 if event is not valid |
| 725 | **/ |
| 726 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, |
| 727 | struct ibmvfc_event *evt) |
| 728 | { |
| 729 | int index = evt - pool->events; |
| 730 | if (index < 0 || index >= pool->size) /* outside of bounds */ |
| 731 | return 0; |
| 732 | if (evt != pool->events + index) /* unaligned */ |
| 733 | return 0; |
| 734 | return 1; |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * ibmvfc_free_event - Free the specified event |
| 739 | * @evt: ibmvfc_event to be freed |
| 740 | * |
| 741 | **/ |
| 742 | static void ibmvfc_free_event(struct ibmvfc_event *evt) |
| 743 | { |
| 744 | struct ibmvfc_host *vhost = evt->vhost; |
| 745 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 746 | |
| 747 | BUG_ON(!ibmvfc_valid_event(pool, evt)); |
| 748 | BUG_ON(atomic_inc_return(&evt->free) != 1); |
| 749 | list_add_tail(&evt->queue, &vhost->free); |
| 750 | } |
| 751 | |
| 752 | /** |
| 753 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands |
| 754 | * @evt: ibmvfc event struct |
| 755 | * |
| 756 | * This function does not setup any error status, that must be done |
| 757 | * before this function gets called. |
| 758 | **/ |
| 759 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) |
| 760 | { |
| 761 | struct scsi_cmnd *cmnd = evt->cmnd; |
| 762 | |
| 763 | if (cmnd) { |
| 764 | scsi_dma_unmap(cmnd); |
| 765 | cmnd->scsi_done(cmnd); |
| 766 | } |
| 767 | |
| 768 | ibmvfc_free_event(evt); |
| 769 | } |
| 770 | |
| 771 | /** |
| 772 | * ibmvfc_fail_request - Fail request with specified error code |
| 773 | * @evt: ibmvfc event struct |
| 774 | * @error_code: error code to fail request with |
| 775 | * |
| 776 | * Return value: |
| 777 | * none |
| 778 | **/ |
| 779 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) |
| 780 | { |
| 781 | if (evt->cmnd) { |
| 782 | evt->cmnd->result = (error_code << 16); |
| 783 | evt->done = ibmvfc_scsi_eh_done; |
| 784 | } else |
| 785 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; |
| 786 | |
| 787 | list_del(&evt->queue); |
| 788 | del_timer(&evt->timer); |
| 789 | ibmvfc_trc_end(evt); |
| 790 | evt->done(evt); |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests |
| 795 | * @vhost: ibmvfc host struct |
| 796 | * @error_code: error code to fail requests with |
| 797 | * |
| 798 | * Return value: |
| 799 | * none |
| 800 | **/ |
| 801 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) |
| 802 | { |
| 803 | struct ibmvfc_event *evt, *pos; |
| 804 | |
| 805 | ibmvfc_dbg(vhost, "Purging all requests\n"); |
| 806 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) |
| 807 | ibmvfc_fail_request(evt, error_code); |
| 808 | } |
| 809 | |
| 810 | /** |
| 811 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
| 812 | * @vhost: struct ibmvfc host to reset |
| 813 | **/ |
| 814 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| 815 | { |
| 816 | int rc; |
| 817 | |
| 818 | scsi_block_requests(vhost->host); |
| 819 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 820 | if ((rc = ibmvfc_reset_crq(vhost)) || |
| 821 | (rc = ibmvfc_send_crq_init(vhost)) || |
| 822 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { |
| 823 | dev_err(vhost->dev, "Error after reset rc=%d\n", rc); |
| 824 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 825 | } else |
| 826 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 827 | } |
| 828 | |
| 829 | /** |
| 830 | * ibmvfc_reset_host - Reset the connection to the server |
| 831 | * @vhost: struct ibmvfc host to reset |
| 832 | **/ |
| 833 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| 834 | { |
| 835 | unsigned long flags; |
| 836 | |
| 837 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 838 | __ibmvfc_reset_host(vhost); |
| 839 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 840 | } |
| 841 | |
| 842 | /** |
| 843 | * ibmvfc_retry_host_init - Retry host initialization if allowed |
| 844 | * @vhost: ibmvfc host struct |
| 845 | * |
| 846 | **/ |
| 847 | static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
| 848 | { |
| 849 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| 850 | if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| 851 | dev_err(vhost->dev, |
| 852 | "Host initialization retries exceeded. Taking adapter offline\n"); |
| 853 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 854 | } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) |
| 855 | __ibmvfc_reset_host(vhost); |
| 856 | else |
| 857 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 858 | } |
| 859 | |
| 860 | wake_up(&vhost->work_wait_q); |
| 861 | } |
| 862 | |
| 863 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 864 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 865 | * @starget: scsi target struct |
| 866 | * |
| 867 | * Return value: |
| 868 | * ibmvfc_target struct / NULL if not found |
| 869 | **/ |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 870 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 871 | { |
| 872 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 873 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 874 | struct ibmvfc_target *tgt; |
| 875 | |
| 876 | list_for_each_entry(tgt, &vhost->targets, queue) |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 877 | if (tgt->target_id == starget->id) { |
| 878 | kref_get(&tgt->kref); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 879 | return tgt; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 880 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 881 | return NULL; |
| 882 | } |
| 883 | |
| 884 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 885 | * ibmvfc_get_target - Find the specified scsi_target |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 886 | * @starget: scsi target struct |
| 887 | * |
| 888 | * Return value: |
| 889 | * ibmvfc_target struct / NULL if not found |
| 890 | **/ |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 891 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 892 | { |
| 893 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 894 | struct ibmvfc_target *tgt; |
| 895 | unsigned long flags; |
| 896 | |
| 897 | spin_lock_irqsave(shost->host_lock, flags); |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 898 | tgt = __ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 899 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 900 | return tgt; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * ibmvfc_get_host_speed - Get host port speed |
| 905 | * @shost: scsi host struct |
| 906 | * |
| 907 | * Return value: |
| 908 | * none |
| 909 | **/ |
| 910 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) |
| 911 | { |
| 912 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 913 | unsigned long flags; |
| 914 | |
| 915 | spin_lock_irqsave(shost->host_lock, flags); |
| 916 | if (vhost->state == IBMVFC_ACTIVE) { |
| 917 | switch (vhost->login_buf->resp.link_speed / 100) { |
| 918 | case 1: |
| 919 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; |
| 920 | break; |
| 921 | case 2: |
| 922 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; |
| 923 | break; |
| 924 | case 4: |
| 925 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; |
| 926 | break; |
| 927 | case 8: |
| 928 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; |
| 929 | break; |
| 930 | case 10: |
| 931 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; |
| 932 | break; |
| 933 | case 16: |
| 934 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; |
| 935 | break; |
| 936 | default: |
| 937 | ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", |
| 938 | vhost->login_buf->resp.link_speed / 100); |
| 939 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| 940 | break; |
| 941 | } |
| 942 | } else |
| 943 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| 944 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 945 | } |
| 946 | |
| 947 | /** |
| 948 | * ibmvfc_get_host_port_state - Get host port state |
| 949 | * @shost: scsi host struct |
| 950 | * |
| 951 | * Return value: |
| 952 | * none |
| 953 | **/ |
| 954 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) |
| 955 | { |
| 956 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 957 | unsigned long flags; |
| 958 | |
| 959 | spin_lock_irqsave(shost->host_lock, flags); |
| 960 | switch (vhost->state) { |
| 961 | case IBMVFC_INITIALIZING: |
| 962 | case IBMVFC_ACTIVE: |
| 963 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
| 964 | break; |
| 965 | case IBMVFC_LINK_DOWN: |
| 966 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
| 967 | break; |
| 968 | case IBMVFC_LINK_DEAD: |
| 969 | case IBMVFC_HOST_OFFLINE: |
| 970 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; |
| 971 | break; |
| 972 | case IBMVFC_HALTED: |
| 973 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; |
| 974 | break; |
Brian King | 0ae808e | 2008-07-22 08:31:39 -0500 | [diff] [blame] | 975 | case IBMVFC_NO_CRQ: |
| 976 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 977 | break; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 978 | default: |
| 979 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); |
| 980 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 981 | break; |
| 982 | } |
| 983 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 984 | } |
| 985 | |
| 986 | /** |
| 987 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout |
| 988 | * @rport: rport struct |
| 989 | * @timeout: timeout value |
| 990 | * |
| 991 | * Return value: |
| 992 | * none |
| 993 | **/ |
| 994 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
| 995 | { |
| 996 | if (timeout) |
| 997 | rport->dev_loss_tmo = timeout; |
| 998 | else |
| 999 | rport->dev_loss_tmo = 1; |
| 1000 | } |
| 1001 | |
| 1002 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1003 | * ibmvfc_release_tgt - Free memory allocated for a target |
| 1004 | * @kref: kref struct |
| 1005 | * |
| 1006 | **/ |
| 1007 | static void ibmvfc_release_tgt(struct kref *kref) |
| 1008 | { |
| 1009 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); |
| 1010 | kfree(tgt); |
| 1011 | } |
| 1012 | |
| 1013 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1014 | * ibmvfc_get_starget_node_name - Get SCSI target's node name |
| 1015 | * @starget: scsi target struct |
| 1016 | * |
| 1017 | * Return value: |
| 1018 | * none |
| 1019 | **/ |
| 1020 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) |
| 1021 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1022 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1023 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1024 | if (tgt) |
| 1025 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1026 | } |
| 1027 | |
| 1028 | /** |
| 1029 | * ibmvfc_get_starget_port_name - Get SCSI target's port name |
| 1030 | * @starget: scsi target struct |
| 1031 | * |
| 1032 | * Return value: |
| 1033 | * none |
| 1034 | **/ |
| 1035 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) |
| 1036 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1037 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1038 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1039 | if (tgt) |
| 1040 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | /** |
| 1044 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID |
| 1045 | * @starget: scsi target struct |
| 1046 | * |
| 1047 | * Return value: |
| 1048 | * none |
| 1049 | **/ |
| 1050 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) |
| 1051 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1052 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1053 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1054 | if (tgt) |
| 1055 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1056 | } |
| 1057 | |
| 1058 | /** |
| 1059 | * ibmvfc_wait_while_resetting - Wait while the host resets |
| 1060 | * @vhost: ibmvfc host struct |
| 1061 | * |
| 1062 | * Return value: |
| 1063 | * 0 on success / other on failure |
| 1064 | **/ |
| 1065 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) |
| 1066 | { |
| 1067 | long timeout = wait_event_timeout(vhost->init_wait_q, |
Brian King | 3eddc56 | 2008-08-15 10:59:21 -0500 | [diff] [blame] | 1068 | ((vhost->state == IBMVFC_ACTIVE || |
| 1069 | vhost->state == IBMVFC_HOST_OFFLINE || |
| 1070 | vhost->state == IBMVFC_LINK_DEAD) && |
| 1071 | vhost->action == IBMVFC_HOST_ACTION_NONE), |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1072 | (init_timeout * HZ)); |
| 1073 | |
| 1074 | return timeout ? 0 : -EIO; |
| 1075 | } |
| 1076 | |
| 1077 | /** |
| 1078 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization |
| 1079 | * @shost: scsi host struct |
| 1080 | * |
| 1081 | * Return value: |
| 1082 | * 0 on success / other on failure |
| 1083 | **/ |
| 1084 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) |
| 1085 | { |
| 1086 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 1087 | |
| 1088 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); |
| 1089 | ibmvfc_reset_host(vhost); |
| 1090 | return ibmvfc_wait_while_resetting(vhost); |
| 1091 | } |
| 1092 | |
| 1093 | /** |
| 1094 | * ibmvfc_gather_partition_info - Gather info about the LPAR |
| 1095 | * |
| 1096 | * Return value: |
| 1097 | * none |
| 1098 | **/ |
| 1099 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) |
| 1100 | { |
| 1101 | struct device_node *rootdn; |
| 1102 | const char *name; |
| 1103 | const unsigned int *num; |
| 1104 | |
| 1105 | rootdn = of_find_node_by_path("/"); |
| 1106 | if (!rootdn) |
| 1107 | return; |
| 1108 | |
| 1109 | name = of_get_property(rootdn, "ibm,partition-name", NULL); |
| 1110 | if (name) |
| 1111 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); |
| 1112 | num = of_get_property(rootdn, "ibm,partition-no", NULL); |
| 1113 | if (num) |
| 1114 | vhost->partition_number = *num; |
| 1115 | of_node_put(rootdn); |
| 1116 | } |
| 1117 | |
| 1118 | /** |
| 1119 | * ibmvfc_set_login_info - Setup info for NPIV login |
| 1120 | * @vhost: ibmvfc host struct |
| 1121 | * |
| 1122 | * Return value: |
| 1123 | * none |
| 1124 | **/ |
| 1125 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) |
| 1126 | { |
| 1127 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; |
| 1128 | struct device_node *of_node = vhost->dev->archdata.of_node; |
| 1129 | const char *location; |
| 1130 | |
| 1131 | memset(login_info, 0, sizeof(*login_info)); |
| 1132 | |
| 1133 | login_info->ostype = IBMVFC_OS_LINUX; |
| 1134 | login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; |
| 1135 | login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); |
| 1136 | login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); |
| 1137 | login_info->partition_num = vhost->partition_number; |
| 1138 | login_info->vfc_frame_version = 1; |
| 1139 | login_info->fcp_version = 3; |
| 1140 | if (vhost->client_migrated) |
| 1141 | login_info->flags = IBMVFC_CLIENT_MIGRATED; |
| 1142 | |
| 1143 | login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| 1144 | login_info->capabilities = IBMVFC_CAN_MIGRATE; |
| 1145 | login_info->async.va = vhost->async_crq.msg_token; |
Brian King | 52d7e86 | 2008-07-22 08:31:46 -0500 | [diff] [blame] | 1146 | login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1147 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
| 1148 | strncpy(login_info->device_name, |
| 1149 | vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); |
| 1150 | |
| 1151 | location = of_get_property(of_node, "ibm,loc-code", NULL); |
| 1152 | location = location ? location : vhost->dev->bus_id; |
| 1153 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
| 1154 | } |
| 1155 | |
| 1156 | /** |
| 1157 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host |
| 1158 | * @vhost: ibmvfc host who owns the event pool |
| 1159 | * |
| 1160 | * Returns zero on success. |
| 1161 | **/ |
| 1162 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) |
| 1163 | { |
| 1164 | int i; |
| 1165 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 1166 | |
| 1167 | ENTER; |
| 1168 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| 1169 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); |
| 1170 | if (!pool->events) |
| 1171 | return -ENOMEM; |
| 1172 | |
| 1173 | pool->iu_storage = dma_alloc_coherent(vhost->dev, |
| 1174 | pool->size * sizeof(*pool->iu_storage), |
| 1175 | &pool->iu_token, 0); |
| 1176 | |
| 1177 | if (!pool->iu_storage) { |
| 1178 | kfree(pool->events); |
| 1179 | return -ENOMEM; |
| 1180 | } |
| 1181 | |
| 1182 | for (i = 0; i < pool->size; ++i) { |
| 1183 | struct ibmvfc_event *evt = &pool->events[i]; |
| 1184 | atomic_set(&evt->free, 1); |
| 1185 | evt->crq.valid = 0x80; |
| 1186 | evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); |
| 1187 | evt->xfer_iu = pool->iu_storage + i; |
| 1188 | evt->vhost = vhost; |
| 1189 | evt->ext_list = NULL; |
| 1190 | list_add_tail(&evt->queue, &vhost->free); |
| 1191 | } |
| 1192 | |
| 1193 | LEAVE; |
| 1194 | return 0; |
| 1195 | } |
| 1196 | |
| 1197 | /** |
| 1198 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host |
| 1199 | * @vhost: ibmvfc host who owns the event pool |
| 1200 | * |
| 1201 | **/ |
| 1202 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) |
| 1203 | { |
| 1204 | int i; |
| 1205 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 1206 | |
| 1207 | ENTER; |
| 1208 | for (i = 0; i < pool->size; ++i) { |
| 1209 | list_del(&pool->events[i].queue); |
| 1210 | BUG_ON(atomic_read(&pool->events[i].free) != 1); |
| 1211 | if (pool->events[i].ext_list) |
| 1212 | dma_pool_free(vhost->sg_pool, |
| 1213 | pool->events[i].ext_list, |
| 1214 | pool->events[i].ext_list_token); |
| 1215 | } |
| 1216 | |
| 1217 | kfree(pool->events); |
| 1218 | dma_free_coherent(vhost->dev, |
| 1219 | pool->size * sizeof(*pool->iu_storage), |
| 1220 | pool->iu_storage, pool->iu_token); |
| 1221 | LEAVE; |
| 1222 | } |
| 1223 | |
| 1224 | /** |
| 1225 | * ibmvfc_get_event - Gets the next free event in pool |
| 1226 | * @vhost: ibmvfc host struct |
| 1227 | * |
| 1228 | * Returns a free event from the pool. |
| 1229 | **/ |
| 1230 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) |
| 1231 | { |
| 1232 | struct ibmvfc_event *evt; |
| 1233 | |
| 1234 | BUG_ON(list_empty(&vhost->free)); |
| 1235 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); |
| 1236 | atomic_set(&evt->free, 0); |
| 1237 | list_del(&evt->queue); |
| 1238 | return evt; |
| 1239 | } |
| 1240 | |
| 1241 | /** |
| 1242 | * ibmvfc_init_event - Initialize fields in an event struct that are always |
| 1243 | * required. |
| 1244 | * @evt: The event |
| 1245 | * @done: Routine to call when the event is responded to |
| 1246 | * @format: SRP or MAD format |
| 1247 | **/ |
| 1248 | static void ibmvfc_init_event(struct ibmvfc_event *evt, |
| 1249 | void (*done) (struct ibmvfc_event *), u8 format) |
| 1250 | { |
| 1251 | evt->cmnd = NULL; |
| 1252 | evt->sync_iu = NULL; |
| 1253 | evt->crq.format = format; |
| 1254 | evt->done = done; |
| 1255 | } |
| 1256 | |
| 1257 | /** |
| 1258 | * ibmvfc_map_sg_list - Initialize scatterlist |
| 1259 | * @scmd: scsi command struct |
| 1260 | * @nseg: number of scatterlist segments |
| 1261 | * @md: memory descriptor list to initialize |
| 1262 | **/ |
| 1263 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, |
| 1264 | struct srp_direct_buf *md) |
| 1265 | { |
| 1266 | int i; |
| 1267 | struct scatterlist *sg; |
| 1268 | |
| 1269 | scsi_for_each_sg(scmd, sg, nseg, i) { |
| 1270 | md[i].va = sg_dma_address(sg); |
| 1271 | md[i].len = sg_dma_len(sg); |
| 1272 | md[i].key = 0; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | /** |
| 1277 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields |
| 1278 | * @scmd: Scsi_Cmnd with the scatterlist |
| 1279 | * @evt: ibmvfc event struct |
| 1280 | * @vfc_cmd: vfc_cmd that contains the memory descriptor |
| 1281 | * @dev: device for which to map dma memory |
| 1282 | * |
| 1283 | * Returns: |
| 1284 | * 0 on success / non-zero on failure |
| 1285 | **/ |
| 1286 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, |
| 1287 | struct ibmvfc_event *evt, |
| 1288 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) |
| 1289 | { |
| 1290 | |
| 1291 | int sg_mapped; |
| 1292 | struct srp_direct_buf *data = &vfc_cmd->ioba; |
| 1293 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); |
| 1294 | |
| 1295 | sg_mapped = scsi_dma_map(scmd); |
| 1296 | if (!sg_mapped) { |
| 1297 | vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; |
| 1298 | return 0; |
| 1299 | } else if (unlikely(sg_mapped < 0)) { |
| 1300 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1301 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); |
| 1302 | return sg_mapped; |
| 1303 | } |
| 1304 | |
| 1305 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
| 1306 | vfc_cmd->flags |= IBMVFC_WRITE; |
| 1307 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; |
| 1308 | } else { |
| 1309 | vfc_cmd->flags |= IBMVFC_READ; |
| 1310 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; |
| 1311 | } |
| 1312 | |
| 1313 | if (sg_mapped == 1) { |
| 1314 | ibmvfc_map_sg_list(scmd, sg_mapped, data); |
| 1315 | return 0; |
| 1316 | } |
| 1317 | |
| 1318 | vfc_cmd->flags |= IBMVFC_SCATTERLIST; |
| 1319 | |
| 1320 | if (!evt->ext_list) { |
| 1321 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, |
| 1322 | &evt->ext_list_token); |
| 1323 | |
| 1324 | if (!evt->ext_list) { |
| 1325 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); |
| 1326 | return -ENOMEM; |
| 1327 | } |
| 1328 | } |
| 1329 | |
| 1330 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); |
| 1331 | |
| 1332 | data->va = evt->ext_list_token; |
| 1333 | data->len = sg_mapped * sizeof(struct srp_direct_buf); |
| 1334 | data->key = 0; |
| 1335 | return 0; |
| 1336 | } |
| 1337 | |
| 1338 | /** |
| 1339 | * ibmvfc_timeout - Internal command timeout handler |
| 1340 | * @evt: struct ibmvfc_event that timed out |
| 1341 | * |
| 1342 | * Called when an internally generated command times out |
| 1343 | **/ |
| 1344 | static void ibmvfc_timeout(struct ibmvfc_event *evt) |
| 1345 | { |
| 1346 | struct ibmvfc_host *vhost = evt->vhost; |
| 1347 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); |
| 1348 | ibmvfc_reset_host(vhost); |
| 1349 | } |
| 1350 | |
| 1351 | /** |
| 1352 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() |
| 1353 | * @evt: event to be sent |
| 1354 | * @vhost: ibmvfc host struct |
| 1355 | * @timeout: timeout in seconds - 0 means do not time command |
| 1356 | * |
| 1357 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) |
| 1358 | **/ |
| 1359 | static int ibmvfc_send_event(struct ibmvfc_event *evt, |
| 1360 | struct ibmvfc_host *vhost, unsigned long timeout) |
| 1361 | { |
| 1362 | u64 *crq_as_u64 = (u64 *) &evt->crq; |
| 1363 | int rc; |
| 1364 | |
| 1365 | /* Copy the IU into the transfer area */ |
| 1366 | *evt->xfer_iu = evt->iu; |
| 1367 | if (evt->crq.format == IBMVFC_CMD_FORMAT) |
| 1368 | evt->xfer_iu->cmd.tag = (u64)evt; |
| 1369 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
| 1370 | evt->xfer_iu->mad_common.tag = (u64)evt; |
| 1371 | else |
| 1372 | BUG(); |
| 1373 | |
| 1374 | list_add_tail(&evt->queue, &vhost->sent); |
| 1375 | init_timer(&evt->timer); |
| 1376 | |
| 1377 | if (timeout) { |
| 1378 | evt->timer.data = (unsigned long) evt; |
| 1379 | evt->timer.expires = jiffies + (timeout * HZ); |
| 1380 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; |
| 1381 | add_timer(&evt->timer); |
| 1382 | } |
| 1383 | |
| 1384 | if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { |
| 1385 | list_del(&evt->queue); |
| 1386 | del_timer(&evt->timer); |
| 1387 | |
| 1388 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. |
| 1389 | * Firmware will send a CRQ with a transport event (0xFF) to |
| 1390 | * tell this client what has happened to the transport. This |
| 1391 | * will be handled in ibmvfc_handle_crq() |
| 1392 | */ |
| 1393 | if (rc == H_CLOSED) { |
| 1394 | if (printk_ratelimit()) |
| 1395 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); |
| 1396 | if (evt->cmnd) |
| 1397 | scsi_dma_unmap(evt->cmnd); |
| 1398 | ibmvfc_free_event(evt); |
| 1399 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1400 | } |
| 1401 | |
| 1402 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); |
| 1403 | if (evt->cmnd) { |
| 1404 | evt->cmnd->result = DID_ERROR << 16; |
| 1405 | evt->done = ibmvfc_scsi_eh_done; |
| 1406 | } else |
| 1407 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; |
| 1408 | |
| 1409 | evt->done(evt); |
| 1410 | } else |
| 1411 | ibmvfc_trc_start(evt); |
| 1412 | |
| 1413 | return 0; |
| 1414 | } |
| 1415 | |
| 1416 | /** |
| 1417 | * ibmvfc_log_error - Log an error for the failed command if appropriate |
| 1418 | * @evt: ibmvfc event to log |
| 1419 | * |
| 1420 | **/ |
| 1421 | static void ibmvfc_log_error(struct ibmvfc_event *evt) |
| 1422 | { |
| 1423 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 1424 | struct ibmvfc_host *vhost = evt->vhost; |
| 1425 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 1426 | struct scsi_cmnd *cmnd = evt->cmnd; |
| 1427 | const char *err = unknown_error; |
| 1428 | int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| 1429 | int logerr = 0; |
| 1430 | int rsp_code = 0; |
| 1431 | |
| 1432 | if (index >= 0) { |
| 1433 | logerr = cmd_status[index].log; |
| 1434 | err = cmd_status[index].name; |
| 1435 | } |
| 1436 | |
Brian King | 0ae808e | 2008-07-22 08:31:39 -0500 | [diff] [blame] | 1437 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1438 | return; |
| 1439 | |
| 1440 | if (rsp->flags & FCP_RSP_LEN_VALID) |
| 1441 | rsp_code = rsp->data.info.rsp_code; |
| 1442 | |
| 1443 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " |
| 1444 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", |
| 1445 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, |
| 1446 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); |
| 1447 | } |
| 1448 | |
| 1449 | /** |
| 1450 | * ibmvfc_scsi_done - Handle responses from commands |
| 1451 | * @evt: ibmvfc event to be handled |
| 1452 | * |
| 1453 | * Used as a callback when sending scsi cmds. |
| 1454 | **/ |
| 1455 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) |
| 1456 | { |
| 1457 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 1458 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 1459 | struct scsi_cmnd *cmnd = evt->cmnd; |
Brian King | 2bac406 | 2008-08-15 10:59:26 -0500 | [diff] [blame] | 1460 | u32 rsp_len = 0; |
| 1461 | u32 sense_len = rsp->fcp_sense_len; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1462 | |
| 1463 | if (cmnd) { |
| 1464 | if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) |
| 1465 | scsi_set_resid(cmnd, vfc_cmd->adapter_resid); |
| 1466 | else if (rsp->flags & FCP_RESID_UNDER) |
| 1467 | scsi_set_resid(cmnd, rsp->fcp_resid); |
| 1468 | else |
| 1469 | scsi_set_resid(cmnd, 0); |
| 1470 | |
| 1471 | if (vfc_cmd->status) { |
| 1472 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); |
| 1473 | |
| 1474 | if (rsp->flags & FCP_RSP_LEN_VALID) |
| 1475 | rsp_len = rsp->fcp_rsp_len; |
| 1476 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
| 1477 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; |
Brian King | 2bac406 | 2008-08-15 10:59:26 -0500 | [diff] [blame] | 1478 | if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1479 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
| 1480 | |
| 1481 | ibmvfc_log_error(evt); |
| 1482 | } |
| 1483 | |
| 1484 | if (!cmnd->result && |
| 1485 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) |
| 1486 | cmnd->result = (DID_ERROR << 16); |
| 1487 | |
| 1488 | scsi_dma_unmap(cmnd); |
| 1489 | cmnd->scsi_done(cmnd); |
| 1490 | } |
| 1491 | |
| 1492 | ibmvfc_free_event(evt); |
| 1493 | } |
| 1494 | |
| 1495 | /** |
| 1496 | * ibmvfc_host_chkready - Check if the host can accept commands |
| 1497 | * @vhost: struct ibmvfc host |
| 1498 | * |
| 1499 | * Returns: |
| 1500 | * 1 if host can accept command / 0 if not |
| 1501 | **/ |
| 1502 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) |
| 1503 | { |
| 1504 | int result = 0; |
| 1505 | |
| 1506 | switch (vhost->state) { |
| 1507 | case IBMVFC_LINK_DEAD: |
| 1508 | case IBMVFC_HOST_OFFLINE: |
| 1509 | result = DID_NO_CONNECT << 16; |
| 1510 | break; |
| 1511 | case IBMVFC_NO_CRQ: |
| 1512 | case IBMVFC_INITIALIZING: |
| 1513 | case IBMVFC_HALTED: |
| 1514 | case IBMVFC_LINK_DOWN: |
| 1515 | result = DID_REQUEUE << 16; |
| 1516 | break; |
| 1517 | case IBMVFC_ACTIVE: |
| 1518 | result = 0; |
| 1519 | break; |
| 1520 | }; |
| 1521 | |
| 1522 | return result; |
| 1523 | } |
| 1524 | |
| 1525 | /** |
| 1526 | * ibmvfc_queuecommand - The queuecommand function of the scsi template |
| 1527 | * @cmnd: struct scsi_cmnd to be executed |
| 1528 | * @done: Callback function to be called when cmnd is completed |
| 1529 | * |
| 1530 | * Returns: |
| 1531 | * 0 on success / other on failure |
| 1532 | **/ |
| 1533 | static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, |
| 1534 | void (*done) (struct scsi_cmnd *)) |
| 1535 | { |
| 1536 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); |
| 1537 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| 1538 | struct ibmvfc_cmd *vfc_cmd; |
| 1539 | struct ibmvfc_event *evt; |
| 1540 | u8 tag[2]; |
| 1541 | int rc; |
| 1542 | |
| 1543 | if (unlikely((rc = fc_remote_port_chkready(rport))) || |
| 1544 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { |
| 1545 | cmnd->result = rc; |
| 1546 | done(cmnd); |
| 1547 | return 0; |
| 1548 | } |
| 1549 | |
| 1550 | cmnd->result = (DID_OK << 16); |
| 1551 | evt = ibmvfc_get_event(vhost); |
| 1552 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); |
| 1553 | evt->cmnd = cmnd; |
| 1554 | cmnd->scsi_done = done; |
| 1555 | vfc_cmd = &evt->iu.cmd; |
| 1556 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); |
| 1557 | vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1558 | vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); |
| 1559 | vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1560 | vfc_cmd->payload_len = sizeof(vfc_cmd->iu); |
| 1561 | vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); |
| 1562 | vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; |
| 1563 | vfc_cmd->tgt_scsi_id = rport->port_id; |
| 1564 | if ((rport->supported_classes & FC_COS_CLASS3) && |
| 1565 | (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) |
| 1566 | vfc_cmd->flags = IBMVFC_CLASS_3_ERR; |
| 1567 | vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); |
| 1568 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); |
| 1569 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); |
| 1570 | |
| 1571 | if (scsi_populate_tag_msg(cmnd, tag)) { |
| 1572 | vfc_cmd->task_tag = tag[1]; |
| 1573 | switch (tag[0]) { |
| 1574 | case MSG_SIMPLE_TAG: |
| 1575 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; |
| 1576 | break; |
| 1577 | case MSG_HEAD_TAG: |
| 1578 | vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; |
| 1579 | break; |
| 1580 | case MSG_ORDERED_TAG: |
| 1581 | vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; |
| 1582 | break; |
| 1583 | }; |
| 1584 | } |
| 1585 | |
| 1586 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) |
| 1587 | return ibmvfc_send_event(evt, vhost, 0); |
| 1588 | |
| 1589 | ibmvfc_free_event(evt); |
| 1590 | if (rc == -ENOMEM) |
| 1591 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1592 | |
| 1593 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1594 | scmd_printk(KERN_ERR, cmnd, |
| 1595 | "Failed to map DMA buffer for command. rc=%d\n", rc); |
| 1596 | |
| 1597 | cmnd->result = DID_ERROR << 16; |
| 1598 | done(cmnd); |
| 1599 | return 0; |
| 1600 | } |
| 1601 | |
| 1602 | /** |
| 1603 | * ibmvfc_sync_completion - Signal that a synchronous command has completed |
| 1604 | * @evt: ibmvfc event struct |
| 1605 | * |
| 1606 | **/ |
| 1607 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) |
| 1608 | { |
| 1609 | /* copy the response back */ |
| 1610 | if (evt->sync_iu) |
| 1611 | *evt->sync_iu = *evt->xfer_iu; |
| 1612 | |
| 1613 | complete(&evt->comp); |
| 1614 | } |
| 1615 | |
| 1616 | /** |
| 1617 | * ibmvfc_reset_device - Reset the device with the specified reset type |
| 1618 | * @sdev: scsi device to reset |
| 1619 | * @type: reset type |
| 1620 | * @desc: reset type description for log messages |
| 1621 | * |
| 1622 | * Returns: |
| 1623 | * 0 on success / other on failure |
| 1624 | **/ |
| 1625 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) |
| 1626 | { |
| 1627 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1628 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1629 | struct ibmvfc_cmd *tmf; |
| 1630 | struct ibmvfc_event *evt; |
| 1631 | union ibmvfc_iu rsp_iu; |
| 1632 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| 1633 | int rsp_rc = -EBUSY; |
| 1634 | unsigned long flags; |
| 1635 | int rsp_code = 0; |
| 1636 | |
| 1637 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1638 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1639 | evt = ibmvfc_get_event(vhost); |
| 1640 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| 1641 | |
| 1642 | tmf = &evt->iu.cmd; |
| 1643 | memset(tmf, 0, sizeof(*tmf)); |
| 1644 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1645 | tmf->resp.len = sizeof(tmf->rsp); |
| 1646 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1647 | tmf->payload_len = sizeof(tmf->iu); |
| 1648 | tmf->resp_len = sizeof(tmf->rsp); |
| 1649 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1650 | tmf->tgt_scsi_id = rport->port_id; |
| 1651 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| 1652 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| 1653 | tmf->iu.tmf_flags = type; |
| 1654 | evt->sync_iu = &rsp_iu; |
| 1655 | |
| 1656 | init_completion(&evt->comp); |
| 1657 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1658 | } |
| 1659 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1660 | |
| 1661 | if (rsp_rc != 0) { |
| 1662 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", |
| 1663 | desc, rsp_rc); |
| 1664 | return -EIO; |
| 1665 | } |
| 1666 | |
| 1667 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); |
| 1668 | wait_for_completion(&evt->comp); |
| 1669 | |
| 1670 | if (rsp_iu.cmd.status) { |
| 1671 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| 1672 | rsp_code = fc_rsp->data.info.rsp_code; |
| 1673 | |
| 1674 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " |
| 1675 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| 1676 | desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| 1677 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| 1678 | fc_rsp->scsi_status); |
| 1679 | rsp_rc = -EIO; |
| 1680 | } else |
| 1681 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); |
| 1682 | |
| 1683 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1684 | ibmvfc_free_event(evt); |
| 1685 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1686 | return rsp_rc; |
| 1687 | } |
| 1688 | |
| 1689 | /** |
| 1690 | * ibmvfc_abort_task_set - Abort outstanding commands to the device |
| 1691 | * @sdev: scsi device to abort commands |
| 1692 | * |
| 1693 | * This sends an Abort Task Set to the VIOS for the specified device. This does |
| 1694 | * NOT send any cancel to the VIOS. That must be done separately. |
| 1695 | * |
| 1696 | * Returns: |
| 1697 | * 0 on success / other on failure |
| 1698 | **/ |
| 1699 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
| 1700 | { |
| 1701 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1702 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1703 | struct ibmvfc_cmd *tmf; |
| 1704 | struct ibmvfc_event *evt, *found_evt; |
| 1705 | union ibmvfc_iu rsp_iu; |
| 1706 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| 1707 | int rsp_rc = -EBUSY; |
| 1708 | unsigned long flags; |
| 1709 | int rsp_code = 0; |
| 1710 | |
| 1711 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1712 | found_evt = NULL; |
| 1713 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1714 | if (evt->cmnd && evt->cmnd->device == sdev) { |
| 1715 | found_evt = evt; |
| 1716 | break; |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | if (!found_evt) { |
| 1721 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1722 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); |
| 1723 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1724 | return 0; |
| 1725 | } |
| 1726 | |
| 1727 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1728 | evt = ibmvfc_get_event(vhost); |
| 1729 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| 1730 | |
| 1731 | tmf = &evt->iu.cmd; |
| 1732 | memset(tmf, 0, sizeof(*tmf)); |
| 1733 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1734 | tmf->resp.len = sizeof(tmf->rsp); |
| 1735 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1736 | tmf->payload_len = sizeof(tmf->iu); |
| 1737 | tmf->resp_len = sizeof(tmf->rsp); |
| 1738 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1739 | tmf->tgt_scsi_id = rport->port_id; |
| 1740 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| 1741 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| 1742 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; |
| 1743 | evt->sync_iu = &rsp_iu; |
| 1744 | |
| 1745 | init_completion(&evt->comp); |
| 1746 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1747 | } |
| 1748 | |
| 1749 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1750 | |
| 1751 | if (rsp_rc != 0) { |
| 1752 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); |
| 1753 | return -EIO; |
| 1754 | } |
| 1755 | |
| 1756 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); |
| 1757 | wait_for_completion(&evt->comp); |
| 1758 | |
| 1759 | if (rsp_iu.cmd.status) { |
| 1760 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| 1761 | rsp_code = fc_rsp->data.info.rsp_code; |
| 1762 | |
| 1763 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " |
| 1764 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| 1765 | ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| 1766 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| 1767 | fc_rsp->scsi_status); |
| 1768 | rsp_rc = -EIO; |
| 1769 | } else |
| 1770 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); |
| 1771 | |
| 1772 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1773 | ibmvfc_free_event(evt); |
| 1774 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1775 | return rsp_rc; |
| 1776 | } |
| 1777 | |
| 1778 | /** |
| 1779 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device |
| 1780 | * @sdev: scsi device to cancel commands |
| 1781 | * @type: type of error recovery being performed |
| 1782 | * |
| 1783 | * This sends a cancel to the VIOS for the specified device. This does |
| 1784 | * NOT send any abort to the actual device. That must be done separately. |
| 1785 | * |
| 1786 | * Returns: |
| 1787 | * 0 on success / other on failure |
| 1788 | **/ |
| 1789 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) |
| 1790 | { |
| 1791 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1792 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1793 | struct ibmvfc_tmf *tmf; |
| 1794 | struct ibmvfc_event *evt, *found_evt; |
| 1795 | union ibmvfc_iu rsp; |
| 1796 | int rsp_rc = -EBUSY; |
| 1797 | unsigned long flags; |
| 1798 | u16 status; |
| 1799 | |
| 1800 | ENTER; |
| 1801 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1802 | found_evt = NULL; |
| 1803 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1804 | if (evt->cmnd && evt->cmnd->device == sdev) { |
| 1805 | found_evt = evt; |
| 1806 | break; |
| 1807 | } |
| 1808 | } |
| 1809 | |
| 1810 | if (!found_evt) { |
| 1811 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1812 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); |
| 1813 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1814 | return 0; |
| 1815 | } |
| 1816 | |
| 1817 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1818 | evt = ibmvfc_get_event(vhost); |
| 1819 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| 1820 | |
| 1821 | tmf = &evt->iu.tmf; |
| 1822 | memset(tmf, 0, sizeof(*tmf)); |
| 1823 | tmf->common.version = 1; |
| 1824 | tmf->common.opcode = IBMVFC_TMF_MAD; |
| 1825 | tmf->common.length = sizeof(*tmf); |
| 1826 | tmf->scsi_id = rport->port_id; |
| 1827 | int_to_scsilun(sdev->lun, &tmf->lun); |
| 1828 | tmf->flags = (type | IBMVFC_TMF_LUA_VALID); |
| 1829 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1830 | tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata); |
| 1831 | |
| 1832 | evt->sync_iu = &rsp; |
| 1833 | init_completion(&evt->comp); |
| 1834 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1835 | } |
| 1836 | |
| 1837 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1838 | |
| 1839 | if (rsp_rc != 0) { |
| 1840 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); |
| 1841 | return -EIO; |
| 1842 | } |
| 1843 | |
| 1844 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); |
| 1845 | |
| 1846 | wait_for_completion(&evt->comp); |
| 1847 | status = rsp.mad_common.status; |
| 1848 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1849 | ibmvfc_free_event(evt); |
| 1850 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1851 | |
| 1852 | if (status != IBMVFC_MAD_SUCCESS) { |
| 1853 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); |
| 1854 | return -EIO; |
| 1855 | } |
| 1856 | |
| 1857 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); |
| 1858 | return 0; |
| 1859 | } |
| 1860 | |
| 1861 | /** |
| 1862 | * ibmvfc_eh_abort_handler - Abort a command |
| 1863 | * @cmd: scsi command to abort |
| 1864 | * |
| 1865 | * Returns: |
| 1866 | * SUCCESS / FAILED |
| 1867 | **/ |
| 1868 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) |
| 1869 | { |
| 1870 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1871 | struct ibmvfc_event *evt, *pos; |
| 1872 | int cancel_rc, abort_rc; |
| 1873 | unsigned long flags; |
| 1874 | |
| 1875 | ENTER; |
| 1876 | ibmvfc_wait_while_resetting(vhost); |
| 1877 | cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET); |
| 1878 | abort_rc = ibmvfc_abort_task_set(cmd->device); |
| 1879 | |
| 1880 | if (!cancel_rc && !abort_rc) { |
| 1881 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1882 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 1883 | if (evt->cmnd && evt->cmnd->device == cmd->device) |
| 1884 | ibmvfc_fail_request(evt, DID_ABORT); |
| 1885 | } |
| 1886 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1887 | LEAVE; |
| 1888 | return SUCCESS; |
| 1889 | } |
| 1890 | |
| 1891 | LEAVE; |
| 1892 | return FAILED; |
| 1893 | } |
| 1894 | |
| 1895 | /** |
| 1896 | * ibmvfc_eh_device_reset_handler - Reset a single LUN |
| 1897 | * @cmd: scsi command struct |
| 1898 | * |
| 1899 | * Returns: |
| 1900 | * SUCCESS / FAILED |
| 1901 | **/ |
| 1902 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) |
| 1903 | { |
| 1904 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1905 | struct ibmvfc_event *evt, *pos; |
| 1906 | int cancel_rc, reset_rc; |
| 1907 | unsigned long flags; |
| 1908 | |
| 1909 | ENTER; |
| 1910 | ibmvfc_wait_while_resetting(vhost); |
| 1911 | cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET); |
| 1912 | reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN"); |
| 1913 | |
| 1914 | if (!cancel_rc && !reset_rc) { |
| 1915 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1916 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 1917 | if (evt->cmnd && evt->cmnd->device == cmd->device) |
| 1918 | ibmvfc_fail_request(evt, DID_ABORT); |
| 1919 | } |
| 1920 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1921 | LEAVE; |
| 1922 | return SUCCESS; |
| 1923 | } |
| 1924 | |
| 1925 | LEAVE; |
| 1926 | return FAILED; |
| 1927 | } |
| 1928 | |
| 1929 | /** |
| 1930 | * ibmvfc_dev_cancel_all - Device iterated cancel all function |
| 1931 | * @sdev: scsi device struct |
| 1932 | * @data: return code |
| 1933 | * |
| 1934 | **/ |
| 1935 | static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) |
| 1936 | { |
| 1937 | unsigned long *rc = data; |
| 1938 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); |
| 1939 | } |
| 1940 | |
| 1941 | /** |
| 1942 | * ibmvfc_dev_abort_all - Device iterated abort task set function |
| 1943 | * @sdev: scsi device struct |
| 1944 | * @data: return code |
| 1945 | * |
| 1946 | **/ |
| 1947 | static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) |
| 1948 | { |
| 1949 | unsigned long *rc = data; |
| 1950 | *rc |= ibmvfc_abort_task_set(sdev); |
| 1951 | } |
| 1952 | |
| 1953 | /** |
| 1954 | * ibmvfc_eh_target_reset_handler - Reset the target |
| 1955 | * @cmd: scsi command struct |
| 1956 | * |
| 1957 | * Returns: |
| 1958 | * SUCCESS / FAILED |
| 1959 | **/ |
| 1960 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) |
| 1961 | { |
| 1962 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1963 | struct scsi_target *starget = scsi_target(cmd->device); |
| 1964 | struct ibmvfc_event *evt, *pos; |
| 1965 | int reset_rc; |
| 1966 | unsigned long cancel_rc = 0; |
| 1967 | unsigned long flags; |
| 1968 | |
| 1969 | ENTER; |
| 1970 | ibmvfc_wait_while_resetting(vhost); |
| 1971 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| 1972 | reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target"); |
| 1973 | |
| 1974 | if (!cancel_rc && !reset_rc) { |
| 1975 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1976 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 1977 | if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) |
| 1978 | ibmvfc_fail_request(evt, DID_ABORT); |
| 1979 | } |
| 1980 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1981 | LEAVE; |
| 1982 | return SUCCESS; |
| 1983 | } |
| 1984 | |
| 1985 | LEAVE; |
| 1986 | return FAILED; |
| 1987 | } |
| 1988 | |
| 1989 | /** |
| 1990 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server |
| 1991 | * @cmd: struct scsi_cmnd having problems |
| 1992 | * |
| 1993 | **/ |
| 1994 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) |
| 1995 | { |
| 1996 | int rc; |
| 1997 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1998 | |
| 1999 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); |
| 2000 | rc = ibmvfc_issue_fc_host_lip(vhost->host); |
| 2001 | return rc ? FAILED : SUCCESS; |
| 2002 | } |
| 2003 | |
| 2004 | /** |
| 2005 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. |
| 2006 | * @rport: rport struct |
| 2007 | * |
| 2008 | * Return value: |
| 2009 | * none |
| 2010 | **/ |
| 2011 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) |
| 2012 | { |
| 2013 | struct scsi_target *starget = to_scsi_target(&rport->dev); |
| 2014 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2015 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2016 | struct ibmvfc_event *evt, *pos; |
| 2017 | unsigned long cancel_rc = 0; |
| 2018 | unsigned long abort_rc = 0; |
| 2019 | unsigned long flags; |
| 2020 | |
| 2021 | ENTER; |
| 2022 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| 2023 | starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); |
| 2024 | |
| 2025 | if (!cancel_rc && !abort_rc) { |
| 2026 | spin_lock_irqsave(shost->host_lock, flags); |
| 2027 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 2028 | if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) |
| 2029 | ibmvfc_fail_request(evt, DID_ABORT); |
| 2030 | } |
| 2031 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2032 | } else |
| 2033 | ibmvfc_issue_fc_host_lip(shost); |
| 2034 | |
| 2035 | scsi_target_unblock(&rport->dev); |
| 2036 | LEAVE; |
| 2037 | } |
| 2038 | |
| 2039 | static const struct { |
| 2040 | enum ibmvfc_async_event ae; |
| 2041 | const char *desc; |
| 2042 | } ae_desc [] = { |
| 2043 | { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, |
| 2044 | { IBMVFC_AE_ELS_LOGO, "LOGO" }, |
| 2045 | { IBMVFC_AE_ELS_PRLO, "PRLO" }, |
| 2046 | { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, |
| 2047 | { IBMVFC_AE_SCN_GROUP, "Group SCN" }, |
| 2048 | { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, |
| 2049 | { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, |
| 2050 | { IBMVFC_AE_LINK_UP, "Link Up" }, |
| 2051 | { IBMVFC_AE_LINK_DOWN, "Link Down" }, |
| 2052 | { IBMVFC_AE_LINK_DEAD, "Link Dead" }, |
| 2053 | { IBMVFC_AE_HALT, "Halt" }, |
| 2054 | { IBMVFC_AE_RESUME, "Resume" }, |
| 2055 | { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, |
| 2056 | }; |
| 2057 | |
| 2058 | static const char *unknown_ae = "Unknown async"; |
| 2059 | |
| 2060 | /** |
| 2061 | * ibmvfc_get_ae_desc - Get text description for async event |
| 2062 | * @ae: async event |
| 2063 | * |
| 2064 | **/ |
| 2065 | static const char *ibmvfc_get_ae_desc(u64 ae) |
| 2066 | { |
| 2067 | int i; |
| 2068 | |
| 2069 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) |
| 2070 | if (ae_desc[i].ae == ae) |
| 2071 | return ae_desc[i].desc; |
| 2072 | |
| 2073 | return unknown_ae; |
| 2074 | } |
| 2075 | |
| 2076 | /** |
| 2077 | * ibmvfc_handle_async - Handle an async event from the adapter |
| 2078 | * @crq: crq to process |
| 2079 | * @vhost: ibmvfc host struct |
| 2080 | * |
| 2081 | **/ |
| 2082 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, |
| 2083 | struct ibmvfc_host *vhost) |
| 2084 | { |
| 2085 | const char *desc = ibmvfc_get_ae_desc(crq->event); |
| 2086 | |
Brian King | 3e33994 | 2008-08-15 10:59:27 -0500 | [diff] [blame] | 2087 | ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx," |
| 2088 | " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2089 | |
| 2090 | switch (crq->event) { |
| 2091 | case IBMVFC_AE_LINK_UP: |
| 2092 | case IBMVFC_AE_RESUME: |
| 2093 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2094 | ibmvfc_init_host(vhost, 1); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2095 | break; |
| 2096 | case IBMVFC_AE_SCN_FABRIC: |
| 2097 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2098 | ibmvfc_init_host(vhost, 1); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2099 | break; |
| 2100 | case IBMVFC_AE_SCN_NPORT: |
| 2101 | case IBMVFC_AE_SCN_GROUP: |
| 2102 | case IBMVFC_AE_SCN_DOMAIN: |
| 2103 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
| 2104 | case IBMVFC_AE_ELS_LOGO: |
| 2105 | case IBMVFC_AE_ELS_PRLO: |
| 2106 | case IBMVFC_AE_ELS_PLOGI: |
| 2107 | ibmvfc_reinit_host(vhost); |
| 2108 | break; |
| 2109 | case IBMVFC_AE_LINK_DOWN: |
| 2110 | case IBMVFC_AE_ADAPTER_FAILED: |
| 2111 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2112 | break; |
| 2113 | case IBMVFC_AE_LINK_DEAD: |
| 2114 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2115 | break; |
| 2116 | case IBMVFC_AE_HALT: |
| 2117 | ibmvfc_link_down(vhost, IBMVFC_HALTED); |
| 2118 | break; |
| 2119 | default: |
| 2120 | dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); |
| 2121 | break; |
| 2122 | }; |
| 2123 | } |
| 2124 | |
| 2125 | /** |
| 2126 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ |
| 2127 | * @crq: Command/Response queue |
| 2128 | * @vhost: ibmvfc host struct |
| 2129 | * |
| 2130 | **/ |
| 2131 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) |
| 2132 | { |
| 2133 | long rc; |
| 2134 | struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; |
| 2135 | |
| 2136 | switch (crq->valid) { |
| 2137 | case IBMVFC_CRQ_INIT_RSP: |
| 2138 | switch (crq->format) { |
| 2139 | case IBMVFC_CRQ_INIT: |
| 2140 | dev_info(vhost->dev, "Partner initialized\n"); |
| 2141 | /* Send back a response */ |
| 2142 | rc = ibmvfc_send_crq_init_complete(vhost); |
| 2143 | if (rc == 0) |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2144 | ibmvfc_init_host(vhost, 0); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2145 | else |
| 2146 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); |
| 2147 | break; |
| 2148 | case IBMVFC_CRQ_INIT_COMPLETE: |
| 2149 | dev_info(vhost->dev, "Partner initialization complete\n"); |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2150 | ibmvfc_init_host(vhost, 0); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2151 | break; |
| 2152 | default: |
| 2153 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); |
| 2154 | } |
| 2155 | return; |
| 2156 | case IBMVFC_CRQ_XPORT_EVENT: |
| 2157 | vhost->state = IBMVFC_NO_CRQ; |
| 2158 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 2159 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { |
| 2160 | /* We need to re-setup the interpartition connection */ |
| 2161 | dev_info(vhost->dev, "Re-enabling adapter\n"); |
| 2162 | vhost->client_migrated = 1; |
| 2163 | ibmvfc_purge_requests(vhost, DID_REQUEUE); |
| 2164 | if ((rc = ibmvfc_reenable_crq_queue(vhost)) || |
| 2165 | (rc = ibmvfc_send_crq_init(vhost))) { |
| 2166 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2167 | dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); |
| 2168 | } else |
| 2169 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2170 | } else { |
| 2171 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); |
| 2172 | |
| 2173 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 2174 | if ((rc = ibmvfc_reset_crq(vhost)) || |
| 2175 | (rc = ibmvfc_send_crq_init(vhost))) { |
| 2176 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2177 | dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); |
| 2178 | } else |
| 2179 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2180 | } |
| 2181 | return; |
| 2182 | case IBMVFC_CRQ_CMD_RSP: |
| 2183 | break; |
| 2184 | default: |
| 2185 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); |
| 2186 | return; |
| 2187 | } |
| 2188 | |
| 2189 | if (crq->format == IBMVFC_ASYNC_EVENT) |
| 2190 | return; |
| 2191 | |
| 2192 | /* The only kind of payload CRQs we should get are responses to |
| 2193 | * things we send. Make sure this response is to something we |
| 2194 | * actually sent |
| 2195 | */ |
| 2196 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { |
| 2197 | dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", |
| 2198 | crq->ioba); |
| 2199 | return; |
| 2200 | } |
| 2201 | |
| 2202 | if (unlikely(atomic_read(&evt->free))) { |
| 2203 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", |
| 2204 | crq->ioba); |
| 2205 | return; |
| 2206 | } |
| 2207 | |
| 2208 | del_timer(&evt->timer); |
| 2209 | list_del(&evt->queue); |
| 2210 | ibmvfc_trc_end(evt); |
| 2211 | evt->done(evt); |
| 2212 | } |
| 2213 | |
| 2214 | /** |
| 2215 | * ibmvfc_scan_finished - Check if the device scan is done. |
| 2216 | * @shost: scsi host struct |
| 2217 | * @time: current elapsed time |
| 2218 | * |
| 2219 | * Returns: |
| 2220 | * 0 if scan is not done / 1 if scan is done |
| 2221 | **/ |
| 2222 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| 2223 | { |
| 2224 | unsigned long flags; |
| 2225 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2226 | int done = 0; |
| 2227 | |
| 2228 | spin_lock_irqsave(shost->host_lock, flags); |
| 2229 | if (time >= (init_timeout * HZ)) { |
| 2230 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " |
| 2231 | "continuing initialization\n", init_timeout); |
| 2232 | done = 1; |
| 2233 | } |
| 2234 | |
| 2235 | if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) |
| 2236 | done = 1; |
| 2237 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2238 | return done; |
| 2239 | } |
| 2240 | |
| 2241 | /** |
| 2242 | * ibmvfc_slave_alloc - Setup the device's task set value |
| 2243 | * @sdev: struct scsi_device device to configure |
| 2244 | * |
| 2245 | * Set the device's task set value so that error handling works as |
| 2246 | * expected. |
| 2247 | * |
| 2248 | * Returns: |
| 2249 | * 0 on success / -ENXIO if device does not exist |
| 2250 | **/ |
| 2251 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) |
| 2252 | { |
| 2253 | struct Scsi_Host *shost = sdev->host; |
| 2254 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 2255 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2256 | unsigned long flags = 0; |
| 2257 | |
| 2258 | if (!rport || fc_remote_port_chkready(rport)) |
| 2259 | return -ENXIO; |
| 2260 | |
| 2261 | spin_lock_irqsave(shost->host_lock, flags); |
| 2262 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; |
| 2263 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2264 | return 0; |
| 2265 | } |
| 2266 | |
| 2267 | /** |
| 2268 | * ibmvfc_slave_configure - Configure the device |
| 2269 | * @sdev: struct scsi_device device to configure |
| 2270 | * |
| 2271 | * Enable allow_restart for a device if it is a disk. Adjust the |
| 2272 | * queue_depth here also. |
| 2273 | * |
| 2274 | * Returns: |
| 2275 | * 0 |
| 2276 | **/ |
| 2277 | static int ibmvfc_slave_configure(struct scsi_device *sdev) |
| 2278 | { |
| 2279 | struct Scsi_Host *shost = sdev->host; |
| 2280 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); |
| 2281 | unsigned long flags = 0; |
| 2282 | |
| 2283 | spin_lock_irqsave(shost->host_lock, flags); |
| 2284 | if (sdev->type == TYPE_DISK) |
| 2285 | sdev->allow_restart = 1; |
| 2286 | |
| 2287 | if (sdev->tagged_supported) { |
| 2288 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
| 2289 | scsi_activate_tcq(sdev, sdev->queue_depth); |
| 2290 | } else |
| 2291 | scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| 2292 | |
| 2293 | rport->dev_loss_tmo = dev_loss_tmo; |
| 2294 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2295 | return 0; |
| 2296 | } |
| 2297 | |
| 2298 | /** |
| 2299 | * ibmvfc_change_queue_depth - Change the device's queue depth |
| 2300 | * @sdev: scsi device struct |
| 2301 | * @qdepth: depth to set |
| 2302 | * |
| 2303 | * Return value: |
| 2304 | * actual depth set |
| 2305 | **/ |
| 2306 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
| 2307 | { |
| 2308 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) |
| 2309 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; |
| 2310 | |
| 2311 | scsi_adjust_queue_depth(sdev, 0, qdepth); |
| 2312 | return sdev->queue_depth; |
| 2313 | } |
| 2314 | |
| 2315 | /** |
| 2316 | * ibmvfc_change_queue_type - Change the device's queue type |
| 2317 | * @sdev: scsi device struct |
| 2318 | * @tag_type: type of tags to use |
| 2319 | * |
| 2320 | * Return value: |
| 2321 | * actual queue type set |
| 2322 | **/ |
| 2323 | static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) |
| 2324 | { |
| 2325 | if (sdev->tagged_supported) { |
| 2326 | scsi_set_tag_type(sdev, tag_type); |
| 2327 | |
| 2328 | if (tag_type) |
| 2329 | scsi_activate_tcq(sdev, sdev->queue_depth); |
| 2330 | else |
| 2331 | scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| 2332 | } else |
| 2333 | tag_type = 0; |
| 2334 | |
| 2335 | return tag_type; |
| 2336 | } |
| 2337 | |
| 2338 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
| 2339 | struct device_attribute *attr, char *buf) |
| 2340 | { |
| 2341 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2342 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2343 | |
| 2344 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2345 | vhost->login_buf->resp.partition_name); |
| 2346 | } |
| 2347 | |
| 2348 | static struct device_attribute ibmvfc_host_partition_name = { |
| 2349 | .attr = { |
| 2350 | .name = "partition_name", |
| 2351 | .mode = S_IRUGO, |
| 2352 | }, |
| 2353 | .show = ibmvfc_show_host_partition_name, |
| 2354 | }; |
| 2355 | |
| 2356 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
| 2357 | struct device_attribute *attr, char *buf) |
| 2358 | { |
| 2359 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2360 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2361 | |
| 2362 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2363 | vhost->login_buf->resp.device_name); |
| 2364 | } |
| 2365 | |
| 2366 | static struct device_attribute ibmvfc_host_device_name = { |
| 2367 | .attr = { |
| 2368 | .name = "device_name", |
| 2369 | .mode = S_IRUGO, |
| 2370 | }, |
| 2371 | .show = ibmvfc_show_host_device_name, |
| 2372 | }; |
| 2373 | |
| 2374 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
| 2375 | struct device_attribute *attr, char *buf) |
| 2376 | { |
| 2377 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2378 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2379 | |
| 2380 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2381 | vhost->login_buf->resp.port_loc_code); |
| 2382 | } |
| 2383 | |
| 2384 | static struct device_attribute ibmvfc_host_loc_code = { |
| 2385 | .attr = { |
| 2386 | .name = "port_loc_code", |
| 2387 | .mode = S_IRUGO, |
| 2388 | }, |
| 2389 | .show = ibmvfc_show_host_loc_code, |
| 2390 | }; |
| 2391 | |
| 2392 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
| 2393 | struct device_attribute *attr, char *buf) |
| 2394 | { |
| 2395 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2396 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2397 | |
| 2398 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2399 | vhost->login_buf->resp.drc_name); |
| 2400 | } |
| 2401 | |
| 2402 | static struct device_attribute ibmvfc_host_drc_name = { |
| 2403 | .attr = { |
| 2404 | .name = "drc_name", |
| 2405 | .mode = S_IRUGO, |
| 2406 | }, |
| 2407 | .show = ibmvfc_show_host_drc_name, |
| 2408 | }; |
| 2409 | |
| 2410 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
| 2411 | struct device_attribute *attr, char *buf) |
| 2412 | { |
| 2413 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2414 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2415 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); |
| 2416 | } |
| 2417 | |
| 2418 | static struct device_attribute ibmvfc_host_npiv_version = { |
| 2419 | .attr = { |
| 2420 | .name = "npiv_version", |
| 2421 | .mode = S_IRUGO, |
| 2422 | }, |
| 2423 | .show = ibmvfc_show_host_npiv_version, |
| 2424 | }; |
| 2425 | |
| 2426 | /** |
| 2427 | * ibmvfc_show_log_level - Show the adapter's error logging level |
| 2428 | * @dev: class device struct |
| 2429 | * @buf: buffer |
| 2430 | * |
| 2431 | * Return value: |
| 2432 | * number of bytes printed to buffer |
| 2433 | **/ |
| 2434 | static ssize_t ibmvfc_show_log_level(struct device *dev, |
| 2435 | struct device_attribute *attr, char *buf) |
| 2436 | { |
| 2437 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2438 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2439 | unsigned long flags = 0; |
| 2440 | int len; |
| 2441 | |
| 2442 | spin_lock_irqsave(shost->host_lock, flags); |
| 2443 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); |
| 2444 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2445 | return len; |
| 2446 | } |
| 2447 | |
| 2448 | /** |
| 2449 | * ibmvfc_store_log_level - Change the adapter's error logging level |
| 2450 | * @dev: class device struct |
| 2451 | * @buf: buffer |
| 2452 | * |
| 2453 | * Return value: |
| 2454 | * number of bytes printed to buffer |
| 2455 | **/ |
| 2456 | static ssize_t ibmvfc_store_log_level(struct device *dev, |
| 2457 | struct device_attribute *attr, |
| 2458 | const char *buf, size_t count) |
| 2459 | { |
| 2460 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2461 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2462 | unsigned long flags = 0; |
| 2463 | |
| 2464 | spin_lock_irqsave(shost->host_lock, flags); |
| 2465 | vhost->log_level = simple_strtoul(buf, NULL, 10); |
| 2466 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2467 | return strlen(buf); |
| 2468 | } |
| 2469 | |
| 2470 | static struct device_attribute ibmvfc_log_level_attr = { |
| 2471 | .attr = { |
| 2472 | .name = "log_level", |
| 2473 | .mode = S_IRUGO | S_IWUSR, |
| 2474 | }, |
| 2475 | .show = ibmvfc_show_log_level, |
| 2476 | .store = ibmvfc_store_log_level |
| 2477 | }; |
| 2478 | |
| 2479 | #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| 2480 | /** |
| 2481 | * ibmvfc_read_trace - Dump the adapter trace |
| 2482 | * @kobj: kobject struct |
| 2483 | * @bin_attr: bin_attribute struct |
| 2484 | * @buf: buffer |
| 2485 | * @off: offset |
| 2486 | * @count: buffer size |
| 2487 | * |
| 2488 | * Return value: |
| 2489 | * number of bytes printed to buffer |
| 2490 | **/ |
| 2491 | static ssize_t ibmvfc_read_trace(struct kobject *kobj, |
| 2492 | struct bin_attribute *bin_attr, |
| 2493 | char *buf, loff_t off, size_t count) |
| 2494 | { |
| 2495 | struct device *dev = container_of(kobj, struct device, kobj); |
| 2496 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2497 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2498 | unsigned long flags = 0; |
| 2499 | int size = IBMVFC_TRACE_SIZE; |
| 2500 | char *src = (char *)vhost->trace; |
| 2501 | |
| 2502 | if (off > size) |
| 2503 | return 0; |
| 2504 | if (off + count > size) { |
| 2505 | size -= off; |
| 2506 | count = size; |
| 2507 | } |
| 2508 | |
| 2509 | spin_lock_irqsave(shost->host_lock, flags); |
| 2510 | memcpy(buf, &src[off], count); |
| 2511 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2512 | return count; |
| 2513 | } |
| 2514 | |
| 2515 | static struct bin_attribute ibmvfc_trace_attr = { |
| 2516 | .attr = { |
| 2517 | .name = "trace", |
| 2518 | .mode = S_IRUGO, |
| 2519 | }, |
| 2520 | .size = 0, |
| 2521 | .read = ibmvfc_read_trace, |
| 2522 | }; |
| 2523 | #endif |
| 2524 | |
| 2525 | static struct device_attribute *ibmvfc_attrs[] = { |
| 2526 | &ibmvfc_host_partition_name, |
| 2527 | &ibmvfc_host_device_name, |
| 2528 | &ibmvfc_host_loc_code, |
| 2529 | &ibmvfc_host_drc_name, |
| 2530 | &ibmvfc_host_npiv_version, |
| 2531 | &ibmvfc_log_level_attr, |
| 2532 | NULL |
| 2533 | }; |
| 2534 | |
| 2535 | static struct scsi_host_template driver_template = { |
| 2536 | .module = THIS_MODULE, |
| 2537 | .name = "IBM POWER Virtual FC Adapter", |
| 2538 | .proc_name = IBMVFC_NAME, |
| 2539 | .queuecommand = ibmvfc_queuecommand, |
| 2540 | .eh_abort_handler = ibmvfc_eh_abort_handler, |
| 2541 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, |
| 2542 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, |
| 2543 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, |
| 2544 | .slave_alloc = ibmvfc_slave_alloc, |
| 2545 | .slave_configure = ibmvfc_slave_configure, |
| 2546 | .scan_finished = ibmvfc_scan_finished, |
| 2547 | .change_queue_depth = ibmvfc_change_queue_depth, |
| 2548 | .change_queue_type = ibmvfc_change_queue_type, |
| 2549 | .cmd_per_lun = 16, |
| 2550 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, |
| 2551 | .this_id = -1, |
| 2552 | .sg_tablesize = SG_ALL, |
| 2553 | .max_sectors = IBMVFC_MAX_SECTORS, |
| 2554 | .use_clustering = ENABLE_CLUSTERING, |
| 2555 | .shost_attrs = ibmvfc_attrs, |
| 2556 | }; |
| 2557 | |
| 2558 | /** |
| 2559 | * ibmvfc_next_async_crq - Returns the next entry in async queue |
| 2560 | * @vhost: ibmvfc host struct |
| 2561 | * |
| 2562 | * Returns: |
| 2563 | * Pointer to next entry in queue / NULL if empty |
| 2564 | **/ |
| 2565 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) |
| 2566 | { |
| 2567 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; |
| 2568 | struct ibmvfc_async_crq *crq; |
| 2569 | |
| 2570 | crq = &async_crq->msgs[async_crq->cur]; |
| 2571 | if (crq->valid & 0x80) { |
| 2572 | if (++async_crq->cur == async_crq->size) |
| 2573 | async_crq->cur = 0; |
| 2574 | } else |
| 2575 | crq = NULL; |
| 2576 | |
| 2577 | return crq; |
| 2578 | } |
| 2579 | |
| 2580 | /** |
| 2581 | * ibmvfc_next_crq - Returns the next entry in message queue |
| 2582 | * @vhost: ibmvfc host struct |
| 2583 | * |
| 2584 | * Returns: |
| 2585 | * Pointer to next entry in queue / NULL if empty |
| 2586 | **/ |
| 2587 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) |
| 2588 | { |
| 2589 | struct ibmvfc_crq_queue *queue = &vhost->crq; |
| 2590 | struct ibmvfc_crq *crq; |
| 2591 | |
| 2592 | crq = &queue->msgs[queue->cur]; |
| 2593 | if (crq->valid & 0x80) { |
| 2594 | if (++queue->cur == queue->size) |
| 2595 | queue->cur = 0; |
| 2596 | } else |
| 2597 | crq = NULL; |
| 2598 | |
| 2599 | return crq; |
| 2600 | } |
| 2601 | |
| 2602 | /** |
| 2603 | * ibmvfc_interrupt - Interrupt handler |
| 2604 | * @irq: number of irq to handle, not used |
| 2605 | * @dev_instance: ibmvfc_host that received interrupt |
| 2606 | * |
| 2607 | * Returns: |
| 2608 | * IRQ_HANDLED |
| 2609 | **/ |
| 2610 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) |
| 2611 | { |
| 2612 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; |
| 2613 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 2614 | struct ibmvfc_crq *crq; |
| 2615 | struct ibmvfc_async_crq *async; |
| 2616 | unsigned long flags; |
| 2617 | int done = 0; |
| 2618 | |
| 2619 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 2620 | vio_disable_interrupts(to_vio_dev(vhost->dev)); |
| 2621 | while (!done) { |
| 2622 | /* Pull all the valid messages off the CRQ */ |
| 2623 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| 2624 | ibmvfc_handle_crq(crq, vhost); |
| 2625 | crq->valid = 0; |
| 2626 | } |
| 2627 | |
| 2628 | /* Pull all the valid messages off the async CRQ */ |
| 2629 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| 2630 | ibmvfc_handle_async(async, vhost); |
| 2631 | async->valid = 0; |
| 2632 | } |
| 2633 | |
| 2634 | vio_enable_interrupts(vdev); |
| 2635 | if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| 2636 | vio_disable_interrupts(vdev); |
| 2637 | ibmvfc_handle_crq(crq, vhost); |
| 2638 | crq->valid = 0; |
| 2639 | } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| 2640 | vio_disable_interrupts(vdev); |
| 2641 | ibmvfc_handle_async(async, vhost); |
| 2642 | crq->valid = 0; |
| 2643 | } else |
| 2644 | done = 1; |
| 2645 | } |
| 2646 | |
| 2647 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 2648 | return IRQ_HANDLED; |
| 2649 | } |
| 2650 | |
| 2651 | /** |
| 2652 | * ibmvfc_init_tgt - Set the next init job step for the target |
| 2653 | * @tgt: ibmvfc target struct |
| 2654 | * @job_step: job step to perform |
| 2655 | * |
| 2656 | **/ |
| 2657 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, |
| 2658 | void (*job_step) (struct ibmvfc_target *)) |
| 2659 | { |
| 2660 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); |
| 2661 | tgt->job_step = job_step; |
| 2662 | wake_up(&tgt->vhost->work_wait_q); |
| 2663 | } |
| 2664 | |
| 2665 | /** |
| 2666 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization |
| 2667 | * @tgt: ibmvfc target struct |
| 2668 | * @job_step: initialization job step |
| 2669 | * |
| 2670 | **/ |
| 2671 | static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
| 2672 | void (*job_step) (struct ibmvfc_target *)) |
| 2673 | { |
| 2674 | if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| 2675 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 2676 | wake_up(&tgt->vhost->work_wait_q); |
| 2677 | } else |
| 2678 | ibmvfc_init_tgt(tgt, job_step); |
| 2679 | } |
| 2680 | |
| 2681 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2682 | * ibmvfc_tgt_prli_done - Completion handler for Process Login |
| 2683 | * @evt: ibmvfc event struct |
| 2684 | * |
| 2685 | **/ |
| 2686 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) |
| 2687 | { |
| 2688 | struct ibmvfc_target *tgt = evt->tgt; |
| 2689 | struct ibmvfc_host *vhost = evt->vhost; |
| 2690 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; |
| 2691 | u32 status = rsp->common.status; |
| 2692 | |
| 2693 | vhost->discovery_threads--; |
| 2694 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2695 | switch (status) { |
| 2696 | case IBMVFC_MAD_SUCCESS: |
| 2697 | tgt_dbg(tgt, "Process Login succeeded\n"); |
| 2698 | tgt->need_login = 0; |
| 2699 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); |
| 2700 | break; |
| 2701 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2702 | break; |
| 2703 | case IBMVFC_MAD_CRQ_ERROR: |
| 2704 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| 2705 | break; |
| 2706 | case IBMVFC_MAD_FAILED: |
| 2707 | default: |
| 2708 | tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", |
| 2709 | ibmvfc_get_cmd_error(rsp->status, rsp->error), |
| 2710 | rsp->status, rsp->error, status); |
| 2711 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 2712 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| 2713 | break; |
| 2714 | }; |
| 2715 | |
| 2716 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2717 | ibmvfc_free_event(evt); |
| 2718 | wake_up(&vhost->work_wait_q); |
| 2719 | } |
| 2720 | |
| 2721 | /** |
| 2722 | * ibmvfc_tgt_send_prli - Send a process login |
| 2723 | * @tgt: ibmvfc target struct |
| 2724 | * |
| 2725 | **/ |
| 2726 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) |
| 2727 | { |
| 2728 | struct ibmvfc_process_login *prli; |
| 2729 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2730 | struct ibmvfc_event *evt; |
| 2731 | |
| 2732 | if (vhost->discovery_threads >= disc_threads) |
| 2733 | return; |
| 2734 | |
| 2735 | kref_get(&tgt->kref); |
| 2736 | evt = ibmvfc_get_event(vhost); |
| 2737 | vhost->discovery_threads++; |
| 2738 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); |
| 2739 | evt->tgt = tgt; |
| 2740 | prli = &evt->iu.prli; |
| 2741 | memset(prli, 0, sizeof(*prli)); |
| 2742 | prli->common.version = 1; |
| 2743 | prli->common.opcode = IBMVFC_PROCESS_LOGIN; |
| 2744 | prli->common.length = sizeof(*prli); |
| 2745 | prli->scsi_id = tgt->scsi_id; |
| 2746 | |
| 2747 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; |
| 2748 | prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; |
| 2749 | prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; |
| 2750 | |
| 2751 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2752 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2753 | vhost->discovery_threads--; |
| 2754 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2755 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2756 | } else |
| 2757 | tgt_dbg(tgt, "Sent process login\n"); |
| 2758 | } |
| 2759 | |
| 2760 | /** |
| 2761 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login |
| 2762 | * @evt: ibmvfc event struct |
| 2763 | * |
| 2764 | **/ |
| 2765 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) |
| 2766 | { |
| 2767 | struct ibmvfc_target *tgt = evt->tgt; |
| 2768 | struct ibmvfc_host *vhost = evt->vhost; |
| 2769 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; |
| 2770 | u32 status = rsp->common.status; |
| 2771 | |
| 2772 | vhost->discovery_threads--; |
| 2773 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2774 | switch (status) { |
| 2775 | case IBMVFC_MAD_SUCCESS: |
| 2776 | tgt_dbg(tgt, "Port Login succeeded\n"); |
| 2777 | if (tgt->ids.port_name && |
| 2778 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { |
| 2779 | vhost->reinit = 1; |
| 2780 | tgt_dbg(tgt, "Port re-init required\n"); |
| 2781 | break; |
| 2782 | } |
| 2783 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
| 2784 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); |
| 2785 | tgt->ids.port_id = tgt->scsi_id; |
| 2786 | tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; |
| 2787 | memcpy(&tgt->service_parms, &rsp->service_parms, |
| 2788 | sizeof(tgt->service_parms)); |
| 2789 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, |
| 2790 | sizeof(tgt->service_parms_change)); |
| 2791 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); |
| 2792 | break; |
| 2793 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2794 | break; |
| 2795 | case IBMVFC_MAD_CRQ_ERROR: |
| 2796 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| 2797 | break; |
| 2798 | case IBMVFC_MAD_FAILED: |
| 2799 | default: |
| 2800 | tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 2801 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| 2802 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| 2803 | ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); |
| 2804 | |
| 2805 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 2806 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| 2807 | break; |
| 2808 | }; |
| 2809 | |
| 2810 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2811 | ibmvfc_free_event(evt); |
| 2812 | wake_up(&vhost->work_wait_q); |
| 2813 | } |
| 2814 | |
| 2815 | /** |
| 2816 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target |
| 2817 | * @tgt: ibmvfc target struct |
| 2818 | * |
| 2819 | **/ |
| 2820 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) |
| 2821 | { |
| 2822 | struct ibmvfc_port_login *plogi; |
| 2823 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2824 | struct ibmvfc_event *evt; |
| 2825 | |
| 2826 | if (vhost->discovery_threads >= disc_threads) |
| 2827 | return; |
| 2828 | |
| 2829 | kref_get(&tgt->kref); |
| 2830 | evt = ibmvfc_get_event(vhost); |
| 2831 | vhost->discovery_threads++; |
| 2832 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2833 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); |
| 2834 | evt->tgt = tgt; |
| 2835 | plogi = &evt->iu.plogi; |
| 2836 | memset(plogi, 0, sizeof(*plogi)); |
| 2837 | plogi->common.version = 1; |
| 2838 | plogi->common.opcode = IBMVFC_PORT_LOGIN; |
| 2839 | plogi->common.length = sizeof(*plogi); |
| 2840 | plogi->scsi_id = tgt->scsi_id; |
| 2841 | |
| 2842 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2843 | vhost->discovery_threads--; |
| 2844 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2845 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2846 | } else |
| 2847 | tgt_dbg(tgt, "Sent port login\n"); |
| 2848 | } |
| 2849 | |
| 2850 | /** |
| 2851 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD |
| 2852 | * @evt: ibmvfc event struct |
| 2853 | * |
| 2854 | **/ |
| 2855 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) |
| 2856 | { |
| 2857 | struct ibmvfc_target *tgt = evt->tgt; |
| 2858 | struct ibmvfc_host *vhost = evt->vhost; |
| 2859 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; |
| 2860 | u32 status = rsp->common.status; |
| 2861 | |
| 2862 | vhost->discovery_threads--; |
| 2863 | ibmvfc_free_event(evt); |
| 2864 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2865 | |
| 2866 | switch (status) { |
| 2867 | case IBMVFC_MAD_SUCCESS: |
| 2868 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); |
| 2869 | break; |
| 2870 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2871 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2872 | wake_up(&vhost->work_wait_q); |
| 2873 | return; |
| 2874 | case IBMVFC_MAD_FAILED: |
| 2875 | default: |
| 2876 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); |
| 2877 | break; |
| 2878 | }; |
| 2879 | |
| 2880 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) |
| 2881 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); |
| 2882 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && |
| 2883 | tgt->scsi_id != tgt->new_scsi_id) |
| 2884 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 2885 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2886 | wake_up(&vhost->work_wait_q); |
| 2887 | } |
| 2888 | |
| 2889 | /** |
| 2890 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target |
| 2891 | * @tgt: ibmvfc target struct |
| 2892 | * |
| 2893 | **/ |
| 2894 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) |
| 2895 | { |
| 2896 | struct ibmvfc_implicit_logout *mad; |
| 2897 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2898 | struct ibmvfc_event *evt; |
| 2899 | |
| 2900 | if (vhost->discovery_threads >= disc_threads) |
| 2901 | return; |
| 2902 | |
| 2903 | kref_get(&tgt->kref); |
| 2904 | evt = ibmvfc_get_event(vhost); |
| 2905 | vhost->discovery_threads++; |
| 2906 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); |
| 2907 | evt->tgt = tgt; |
| 2908 | mad = &evt->iu.implicit_logout; |
| 2909 | memset(mad, 0, sizeof(*mad)); |
| 2910 | mad->common.version = 1; |
| 2911 | mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; |
| 2912 | mad->common.length = sizeof(*mad); |
| 2913 | mad->old_scsi_id = tgt->scsi_id; |
| 2914 | |
| 2915 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2916 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2917 | vhost->discovery_threads--; |
| 2918 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2919 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2920 | } else |
| 2921 | tgt_dbg(tgt, "Sent Implicit Logout\n"); |
| 2922 | } |
| 2923 | |
| 2924 | /** |
Brian King | 989b854 | 2008-07-22 08:31:47 -0500 | [diff] [blame] | 2925 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? |
| 2926 | * @mad: ibmvfc passthru mad struct |
| 2927 | * @tgt: ibmvfc target struct |
| 2928 | * |
| 2929 | * Returns: |
| 2930 | * 1 if PLOGI needed / 0 if PLOGI not needed |
| 2931 | **/ |
| 2932 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, |
| 2933 | struct ibmvfc_target *tgt) |
| 2934 | { |
| 2935 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, |
| 2936 | sizeof(tgt->ids.port_name))) |
| 2937 | return 1; |
| 2938 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, |
| 2939 | sizeof(tgt->ids.node_name))) |
| 2940 | return 1; |
| 2941 | if (mad->fc_iu.response[6] != tgt->scsi_id) |
| 2942 | return 1; |
| 2943 | return 0; |
| 2944 | } |
| 2945 | |
| 2946 | /** |
| 2947 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC |
| 2948 | * @evt: ibmvfc event struct |
| 2949 | * |
| 2950 | **/ |
| 2951 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) |
| 2952 | { |
| 2953 | struct ibmvfc_target *tgt = evt->tgt; |
| 2954 | struct ibmvfc_host *vhost = evt->vhost; |
| 2955 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; |
| 2956 | u32 status = mad->common.status; |
| 2957 | u8 fc_reason, fc_explain; |
| 2958 | |
| 2959 | vhost->discovery_threads--; |
| 2960 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2961 | |
| 2962 | switch (status) { |
| 2963 | case IBMVFC_MAD_SUCCESS: |
| 2964 | tgt_dbg(tgt, "ADISC succeeded\n"); |
| 2965 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) |
| 2966 | tgt->need_login = 1; |
| 2967 | break; |
| 2968 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2969 | break; |
| 2970 | case IBMVFC_MAD_FAILED: |
| 2971 | default: |
| 2972 | tgt->need_login = 1; |
| 2973 | fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; |
| 2974 | fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; |
| 2975 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 2976 | ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), |
| 2977 | mad->iu.status, mad->iu.error, |
| 2978 | ibmvfc_get_fc_type(fc_reason), fc_reason, |
| 2979 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); |
| 2980 | break; |
| 2981 | }; |
| 2982 | |
| 2983 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2984 | ibmvfc_free_event(evt); |
| 2985 | wake_up(&vhost->work_wait_q); |
| 2986 | } |
| 2987 | |
| 2988 | /** |
| 2989 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru |
| 2990 | * @evt: ibmvfc event struct |
| 2991 | * |
| 2992 | **/ |
| 2993 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) |
| 2994 | { |
| 2995 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; |
| 2996 | |
| 2997 | memset(mad, 0, sizeof(*mad)); |
| 2998 | mad->common.version = 1; |
| 2999 | mad->common.opcode = IBMVFC_PASSTHRU; |
| 3000 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); |
| 3001 | mad->cmd_ioba.va = (u64)evt->crq.ioba + |
| 3002 | offsetof(struct ibmvfc_passthru_mad, iu); |
| 3003 | mad->cmd_ioba.len = sizeof(mad->iu); |
| 3004 | mad->iu.cmd_len = sizeof(mad->fc_iu.payload); |
| 3005 | mad->iu.rsp_len = sizeof(mad->fc_iu.response); |
| 3006 | mad->iu.cmd.va = (u64)evt->crq.ioba + |
| 3007 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| 3008 | offsetof(struct ibmvfc_passthru_fc_iu, payload); |
| 3009 | mad->iu.cmd.len = sizeof(mad->fc_iu.payload); |
| 3010 | mad->iu.rsp.va = (u64)evt->crq.ioba + |
| 3011 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| 3012 | offsetof(struct ibmvfc_passthru_fc_iu, response); |
| 3013 | mad->iu.rsp.len = sizeof(mad->fc_iu.response); |
| 3014 | } |
| 3015 | |
| 3016 | /** |
| 3017 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target |
| 3018 | * @tgt: ibmvfc target struct |
| 3019 | * |
| 3020 | **/ |
| 3021 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) |
| 3022 | { |
| 3023 | struct ibmvfc_passthru_mad *mad; |
| 3024 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3025 | struct ibmvfc_event *evt; |
| 3026 | |
| 3027 | if (vhost->discovery_threads >= disc_threads) |
| 3028 | return; |
| 3029 | |
| 3030 | kref_get(&tgt->kref); |
| 3031 | evt = ibmvfc_get_event(vhost); |
| 3032 | vhost->discovery_threads++; |
| 3033 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); |
| 3034 | evt->tgt = tgt; |
| 3035 | |
| 3036 | ibmvfc_init_passthru(evt); |
| 3037 | mad = &evt->iu.passthru; |
| 3038 | mad->iu.flags = IBMVFC_FC_ELS; |
| 3039 | mad->iu.scsi_id = tgt->scsi_id; |
| 3040 | |
| 3041 | mad->fc_iu.payload[0] = IBMVFC_ADISC; |
| 3042 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
| 3043 | sizeof(vhost->login_buf->resp.port_name)); |
| 3044 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, |
| 3045 | sizeof(vhost->login_buf->resp.node_name)); |
| 3046 | mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; |
| 3047 | |
| 3048 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3049 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3050 | vhost->discovery_threads--; |
| 3051 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3052 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3053 | } else |
| 3054 | tgt_dbg(tgt, "Sent ADISC\n"); |
| 3055 | } |
| 3056 | |
| 3057 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3058 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD |
| 3059 | * @evt: ibmvfc event struct |
| 3060 | * |
| 3061 | **/ |
| 3062 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) |
| 3063 | { |
| 3064 | struct ibmvfc_target *tgt = evt->tgt; |
| 3065 | struct ibmvfc_host *vhost = evt->vhost; |
| 3066 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; |
| 3067 | u32 status = rsp->common.status; |
| 3068 | |
| 3069 | vhost->discovery_threads--; |
| 3070 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3071 | switch (status) { |
| 3072 | case IBMVFC_MAD_SUCCESS: |
| 3073 | tgt_dbg(tgt, "Query Target succeeded\n"); |
| 3074 | tgt->new_scsi_id = rsp->scsi_id; |
| 3075 | if (rsp->scsi_id != tgt->scsi_id) |
| 3076 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
Brian King | 989b854 | 2008-07-22 08:31:47 -0500 | [diff] [blame] | 3077 | else |
| 3078 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3079 | break; |
| 3080 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3081 | break; |
| 3082 | case IBMVFC_MAD_CRQ_ERROR: |
| 3083 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| 3084 | break; |
| 3085 | case IBMVFC_MAD_FAILED: |
| 3086 | default: |
| 3087 | tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 3088 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| 3089 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| 3090 | ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); |
| 3091 | |
| 3092 | if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
| 3093 | rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && |
| 3094 | rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) |
| 3095 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 3096 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 3097 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| 3098 | break; |
| 3099 | }; |
| 3100 | |
| 3101 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3102 | ibmvfc_free_event(evt); |
| 3103 | wake_up(&vhost->work_wait_q); |
| 3104 | } |
| 3105 | |
| 3106 | /** |
| 3107 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target |
| 3108 | * @tgt: ibmvfc target struct |
| 3109 | * |
| 3110 | **/ |
| 3111 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) |
| 3112 | { |
| 3113 | struct ibmvfc_query_tgt *query_tgt; |
| 3114 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3115 | struct ibmvfc_event *evt; |
| 3116 | |
| 3117 | if (vhost->discovery_threads >= disc_threads) |
| 3118 | return; |
| 3119 | |
| 3120 | kref_get(&tgt->kref); |
| 3121 | evt = ibmvfc_get_event(vhost); |
| 3122 | vhost->discovery_threads++; |
| 3123 | evt->tgt = tgt; |
| 3124 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); |
| 3125 | query_tgt = &evt->iu.query_tgt; |
| 3126 | memset(query_tgt, 0, sizeof(*query_tgt)); |
| 3127 | query_tgt->common.version = 1; |
| 3128 | query_tgt->common.opcode = IBMVFC_QUERY_TARGET; |
| 3129 | query_tgt->common.length = sizeof(*query_tgt); |
| 3130 | query_tgt->wwpn = tgt->ids.port_name; |
| 3131 | |
| 3132 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3133 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3134 | vhost->discovery_threads--; |
| 3135 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3136 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3137 | } else |
| 3138 | tgt_dbg(tgt, "Sent Query Target\n"); |
| 3139 | } |
| 3140 | |
| 3141 | /** |
| 3142 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target |
| 3143 | * @vhost: ibmvfc host struct |
| 3144 | * @scsi_id: SCSI ID to allocate target for |
| 3145 | * |
| 3146 | * Returns: |
| 3147 | * 0 on success / other on failure |
| 3148 | **/ |
| 3149 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) |
| 3150 | { |
| 3151 | struct ibmvfc_target *tgt; |
| 3152 | unsigned long flags; |
| 3153 | |
| 3154 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3155 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3156 | if (tgt->scsi_id == scsi_id) { |
| 3157 | if (tgt->need_login) |
| 3158 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| 3159 | goto unlock_out; |
| 3160 | } |
| 3161 | } |
| 3162 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3163 | |
| 3164 | tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); |
| 3165 | if (!tgt) { |
| 3166 | dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", |
| 3167 | scsi_id); |
| 3168 | return -ENOMEM; |
| 3169 | } |
| 3170 | |
| 3171 | tgt->scsi_id = scsi_id; |
| 3172 | tgt->new_scsi_id = scsi_id; |
| 3173 | tgt->vhost = vhost; |
| 3174 | tgt->need_login = 1; |
| 3175 | kref_init(&tgt->kref); |
| 3176 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| 3177 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3178 | list_add_tail(&tgt->queue, &vhost->targets); |
| 3179 | |
| 3180 | unlock_out: |
| 3181 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3182 | return 0; |
| 3183 | } |
| 3184 | |
| 3185 | /** |
| 3186 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets |
| 3187 | * @vhost: ibmvfc host struct |
| 3188 | * |
| 3189 | * Returns: |
| 3190 | * 0 on success / other on failure |
| 3191 | **/ |
| 3192 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) |
| 3193 | { |
| 3194 | int i, rc; |
| 3195 | |
| 3196 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) |
| 3197 | rc = ibmvfc_alloc_target(vhost, |
| 3198 | vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); |
| 3199 | |
| 3200 | return rc; |
| 3201 | } |
| 3202 | |
| 3203 | /** |
| 3204 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD |
| 3205 | * @evt: ibmvfc event struct |
| 3206 | * |
| 3207 | **/ |
| 3208 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) |
| 3209 | { |
| 3210 | struct ibmvfc_host *vhost = evt->vhost; |
| 3211 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; |
| 3212 | u32 mad_status = rsp->common.status; |
| 3213 | |
| 3214 | switch (mad_status) { |
| 3215 | case IBMVFC_MAD_SUCCESS: |
| 3216 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); |
| 3217 | vhost->num_targets = rsp->num_written; |
| 3218 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
| 3219 | break; |
| 3220 | case IBMVFC_MAD_FAILED: |
| 3221 | dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", |
| 3222 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| 3223 | ibmvfc_retry_host_init(vhost); |
| 3224 | break; |
| 3225 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3226 | break; |
| 3227 | default: |
| 3228 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); |
| 3229 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3230 | break; |
| 3231 | } |
| 3232 | |
| 3233 | ibmvfc_free_event(evt); |
| 3234 | wake_up(&vhost->work_wait_q); |
| 3235 | } |
| 3236 | |
| 3237 | /** |
| 3238 | * ibmvfc_discover_targets - Send Discover Targets MAD |
| 3239 | * @vhost: ibmvfc host struct |
| 3240 | * |
| 3241 | **/ |
| 3242 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) |
| 3243 | { |
| 3244 | struct ibmvfc_discover_targets *mad; |
| 3245 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| 3246 | |
| 3247 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); |
| 3248 | mad = &evt->iu.discover_targets; |
| 3249 | memset(mad, 0, sizeof(*mad)); |
| 3250 | mad->common.version = 1; |
| 3251 | mad->common.opcode = IBMVFC_DISC_TARGETS; |
| 3252 | mad->common.length = sizeof(*mad); |
| 3253 | mad->bufflen = vhost->disc_buf_sz; |
| 3254 | mad->buffer.va = vhost->disc_buf_dma; |
| 3255 | mad->buffer.len = vhost->disc_buf_sz; |
| 3256 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| 3257 | |
| 3258 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| 3259 | ibmvfc_dbg(vhost, "Sent discover targets\n"); |
| 3260 | else |
| 3261 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3262 | } |
| 3263 | |
| 3264 | /** |
| 3265 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login |
| 3266 | * @evt: ibmvfc event struct |
| 3267 | * |
| 3268 | **/ |
| 3269 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) |
| 3270 | { |
| 3271 | struct ibmvfc_host *vhost = evt->vhost; |
| 3272 | u32 mad_status = evt->xfer_iu->npiv_login.common.status; |
| 3273 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
| 3274 | unsigned int npiv_max_sectors; |
| 3275 | |
| 3276 | switch (mad_status) { |
| 3277 | case IBMVFC_MAD_SUCCESS: |
| 3278 | ibmvfc_free_event(evt); |
| 3279 | break; |
| 3280 | case IBMVFC_MAD_FAILED: |
| 3281 | dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", |
| 3282 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| 3283 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 3284 | ibmvfc_retry_host_init(vhost); |
| 3285 | else |
| 3286 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3287 | ibmvfc_free_event(evt); |
| 3288 | return; |
| 3289 | case IBMVFC_MAD_CRQ_ERROR: |
| 3290 | ibmvfc_retry_host_init(vhost); |
| 3291 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3292 | ibmvfc_free_event(evt); |
| 3293 | return; |
| 3294 | default: |
| 3295 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); |
| 3296 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3297 | ibmvfc_free_event(evt); |
| 3298 | return; |
| 3299 | } |
| 3300 | |
| 3301 | vhost->client_migrated = 0; |
| 3302 | |
| 3303 | if (!(rsp->flags & IBMVFC_NATIVE_FC)) { |
| 3304 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
| 3305 | rsp->flags); |
| 3306 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3307 | wake_up(&vhost->work_wait_q); |
| 3308 | return; |
| 3309 | } |
| 3310 | |
| 3311 | if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { |
| 3312 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
| 3313 | rsp->max_cmds); |
| 3314 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3315 | wake_up(&vhost->work_wait_q); |
| 3316 | return; |
| 3317 | } |
| 3318 | |
| 3319 | npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); |
| 3320 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
| 3321 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, |
| 3322 | rsp->drc_name, npiv_max_sectors); |
| 3323 | |
| 3324 | fc_host_fabric_name(vhost->host) = rsp->node_name; |
| 3325 | fc_host_node_name(vhost->host) = rsp->node_name; |
| 3326 | fc_host_port_name(vhost->host) = rsp->port_name; |
| 3327 | fc_host_port_id(vhost->host) = rsp->scsi_id; |
| 3328 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
| 3329 | fc_host_supported_classes(vhost->host) = 0; |
| 3330 | if (rsp->service_parms.class1_parms[0] & 0x80000000) |
| 3331 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
| 3332 | if (rsp->service_parms.class2_parms[0] & 0x80000000) |
| 3333 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
| 3334 | if (rsp->service_parms.class3_parms[0] & 0x80000000) |
| 3335 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
| 3336 | fc_host_maxframe_size(vhost->host) = |
| 3337 | rsp->service_parms.common.bb_rcv_sz & 0x0fff; |
| 3338 | |
| 3339 | vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; |
| 3340 | vhost->host->max_sectors = npiv_max_sectors; |
| 3341 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 3342 | wake_up(&vhost->work_wait_q); |
| 3343 | } |
| 3344 | |
| 3345 | /** |
| 3346 | * ibmvfc_npiv_login - Sends NPIV login |
| 3347 | * @vhost: ibmvfc host struct |
| 3348 | * |
| 3349 | **/ |
| 3350 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) |
| 3351 | { |
| 3352 | struct ibmvfc_npiv_login_mad *mad; |
| 3353 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| 3354 | |
| 3355 | ibmvfc_gather_partition_info(vhost); |
| 3356 | ibmvfc_set_login_info(vhost); |
| 3357 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); |
| 3358 | |
| 3359 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); |
| 3360 | mad = &evt->iu.npiv_login; |
| 3361 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); |
| 3362 | mad->common.version = 1; |
| 3363 | mad->common.opcode = IBMVFC_NPIV_LOGIN; |
| 3364 | mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); |
| 3365 | mad->buffer.va = vhost->login_buf_dma; |
| 3366 | mad->buffer.len = sizeof(*vhost->login_buf); |
| 3367 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3368 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| 3369 | |
| 3370 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| 3371 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); |
| 3372 | else |
| 3373 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3374 | }; |
| 3375 | |
| 3376 | /** |
| 3377 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? |
| 3378 | * @vhost: ibmvfc host struct |
| 3379 | * |
| 3380 | * Returns: |
| 3381 | * 1 if work to do / 0 if not |
| 3382 | **/ |
| 3383 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) |
| 3384 | { |
| 3385 | struct ibmvfc_target *tgt; |
| 3386 | |
| 3387 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3388 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || |
| 3389 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| 3390 | return 1; |
| 3391 | } |
| 3392 | |
| 3393 | return 0; |
| 3394 | } |
| 3395 | |
| 3396 | /** |
| 3397 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) |
| 3398 | * @vhost: ibmvfc host struct |
| 3399 | * |
| 3400 | * Returns: |
| 3401 | * 1 if work to do / 0 if not |
| 3402 | **/ |
| 3403 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| 3404 | { |
| 3405 | struct ibmvfc_target *tgt; |
| 3406 | |
| 3407 | if (kthread_should_stop()) |
| 3408 | return 1; |
| 3409 | switch (vhost->action) { |
| 3410 | case IBMVFC_HOST_ACTION_NONE: |
| 3411 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 3412 | return 0; |
| 3413 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 3414 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 3415 | if (vhost->discovery_threads == disc_threads) |
| 3416 | return 0; |
| 3417 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3418 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) |
| 3419 | return 1; |
| 3420 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3421 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| 3422 | return 0; |
| 3423 | return 1; |
| 3424 | case IBMVFC_HOST_ACTION_INIT: |
| 3425 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 3426 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 3427 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 3428 | case IBMVFC_HOST_ACTION_QUERY: |
| 3429 | default: |
| 3430 | break; |
| 3431 | }; |
| 3432 | |
| 3433 | return 1; |
| 3434 | } |
| 3435 | |
| 3436 | /** |
| 3437 | * ibmvfc_work_to_do - Is there task level work to do? |
| 3438 | * @vhost: ibmvfc host struct |
| 3439 | * |
| 3440 | * Returns: |
| 3441 | * 1 if work to do / 0 if not |
| 3442 | **/ |
| 3443 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| 3444 | { |
| 3445 | unsigned long flags; |
| 3446 | int rc; |
| 3447 | |
| 3448 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3449 | rc = __ibmvfc_work_to_do(vhost); |
| 3450 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3451 | return rc; |
| 3452 | } |
| 3453 | |
| 3454 | /** |
| 3455 | * ibmvfc_log_ae - Log async events if necessary |
| 3456 | * @vhost: ibmvfc host struct |
| 3457 | * @events: events to log |
| 3458 | * |
| 3459 | **/ |
| 3460 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) |
| 3461 | { |
| 3462 | if (events & IBMVFC_AE_RSCN) |
| 3463 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); |
| 3464 | if ((events & IBMVFC_AE_LINKDOWN) && |
| 3465 | vhost->state >= IBMVFC_HALTED) |
| 3466 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); |
| 3467 | if ((events & IBMVFC_AE_LINKUP) && |
| 3468 | vhost->state == IBMVFC_INITIALIZING) |
| 3469 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); |
| 3470 | } |
| 3471 | |
| 3472 | /** |
| 3473 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port |
| 3474 | * @tgt: ibmvfc target struct |
| 3475 | * |
| 3476 | **/ |
| 3477 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) |
| 3478 | { |
| 3479 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3480 | struct fc_rport *rport; |
| 3481 | unsigned long flags; |
| 3482 | |
| 3483 | tgt_dbg(tgt, "Adding rport\n"); |
| 3484 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); |
| 3485 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3486 | tgt->rport = rport; |
| 3487 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3488 | if (rport) { |
| 3489 | tgt_dbg(tgt, "rport add succeeded\n"); |
| 3490 | rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; |
| 3491 | rport->supported_classes = 0; |
Brian King | 52d7e86 | 2008-07-22 08:31:46 -0500 | [diff] [blame] | 3492 | tgt->target_id = rport->scsi_target_id; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3493 | if (tgt->service_parms.class1_parms[0] & 0x80000000) |
| 3494 | rport->supported_classes |= FC_COS_CLASS1; |
| 3495 | if (tgt->service_parms.class2_parms[0] & 0x80000000) |
| 3496 | rport->supported_classes |= FC_COS_CLASS2; |
| 3497 | if (tgt->service_parms.class3_parms[0] & 0x80000000) |
| 3498 | rport->supported_classes |= FC_COS_CLASS3; |
| 3499 | } else |
| 3500 | tgt_dbg(tgt, "rport add failed\n"); |
| 3501 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3502 | } |
| 3503 | |
| 3504 | /** |
| 3505 | * ibmvfc_do_work - Do task level work |
| 3506 | * @vhost: ibmvfc host struct |
| 3507 | * |
| 3508 | **/ |
| 3509 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) |
| 3510 | { |
| 3511 | struct ibmvfc_target *tgt; |
| 3512 | unsigned long flags; |
| 3513 | struct fc_rport *rport; |
| 3514 | |
| 3515 | ibmvfc_log_ae(vhost, vhost->events_to_log); |
| 3516 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3517 | vhost->events_to_log = 0; |
| 3518 | switch (vhost->action) { |
| 3519 | case IBMVFC_HOST_ACTION_NONE: |
| 3520 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 3521 | break; |
| 3522 | case IBMVFC_HOST_ACTION_INIT: |
| 3523 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); |
| 3524 | vhost->job_step(vhost); |
| 3525 | break; |
| 3526 | case IBMVFC_HOST_ACTION_QUERY: |
| 3527 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3528 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); |
| 3529 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); |
| 3530 | break; |
| 3531 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 3532 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3533 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| 3534 | tgt->job_step(tgt); |
| 3535 | break; |
| 3536 | } |
| 3537 | } |
| 3538 | |
| 3539 | if (!ibmvfc_dev_init_to_do(vhost)) |
| 3540 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| 3541 | break; |
| 3542 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 3543 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3544 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| 3545 | tgt_dbg(tgt, "Deleting rport\n"); |
| 3546 | rport = tgt->rport; |
| 3547 | tgt->rport = NULL; |
| 3548 | list_del(&tgt->queue); |
| 3549 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3550 | if (rport) |
| 3551 | fc_remote_port_delete(rport); |
| 3552 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3553 | return; |
| 3554 | } |
| 3555 | } |
| 3556 | |
| 3557 | if (vhost->state == IBMVFC_INITIALIZING) { |
| 3558 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 3559 | vhost->job_step = ibmvfc_discover_targets; |
| 3560 | } else { |
| 3561 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 3562 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3563 | scsi_unblock_requests(vhost->host); |
| 3564 | wake_up(&vhost->init_wait_q); |
| 3565 | return; |
| 3566 | } |
| 3567 | break; |
| 3568 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 3569 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); |
| 3570 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3571 | ibmvfc_alloc_targets(vhost); |
| 3572 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3573 | break; |
| 3574 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 3575 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3576 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| 3577 | tgt->job_step(tgt); |
| 3578 | break; |
| 3579 | } |
| 3580 | } |
| 3581 | |
| 3582 | if (!ibmvfc_dev_init_to_do(vhost)) { |
| 3583 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); |
| 3584 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); |
| 3585 | vhost->init_retries = 0; |
| 3586 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3587 | scsi_unblock_requests(vhost->host); |
| 3588 | return; |
| 3589 | } |
| 3590 | break; |
| 3591 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 3592 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3593 | if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { |
| 3594 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3595 | ibmvfc_tgt_add_rport(tgt); |
| 3596 | return; |
| 3597 | } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| 3598 | tgt_dbg(tgt, "Deleting rport\n"); |
| 3599 | rport = tgt->rport; |
| 3600 | tgt->rport = NULL; |
| 3601 | list_del(&tgt->queue); |
| 3602 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3603 | if (rport) |
| 3604 | fc_remote_port_delete(rport); |
| 3605 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3606 | return; |
| 3607 | } |
| 3608 | } |
| 3609 | |
Brian King | 915be02 | 2008-08-15 10:59:22 -0500 | [diff] [blame] | 3610 | if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3611 | vhost->reinit = 0; |
Brian King | 915be02 | 2008-08-15 10:59:22 -0500 | [diff] [blame] | 3612 | scsi_block_requests(vhost->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3613 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 3614 | } else { |
| 3615 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 3616 | wake_up(&vhost->init_wait_q); |
| 3617 | } |
| 3618 | break; |
| 3619 | default: |
| 3620 | break; |
| 3621 | }; |
| 3622 | |
| 3623 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3624 | } |
| 3625 | |
| 3626 | /** |
| 3627 | * ibmvfc_work - Do task level work |
| 3628 | * @data: ibmvfc host struct |
| 3629 | * |
| 3630 | * Returns: |
| 3631 | * zero |
| 3632 | **/ |
| 3633 | static int ibmvfc_work(void *data) |
| 3634 | { |
| 3635 | struct ibmvfc_host *vhost = data; |
| 3636 | int rc; |
| 3637 | |
| 3638 | set_user_nice(current, -20); |
| 3639 | |
| 3640 | while (1) { |
| 3641 | rc = wait_event_interruptible(vhost->work_wait_q, |
| 3642 | ibmvfc_work_to_do(vhost)); |
| 3643 | |
| 3644 | BUG_ON(rc); |
| 3645 | |
| 3646 | if (kthread_should_stop()) |
| 3647 | break; |
| 3648 | |
| 3649 | ibmvfc_do_work(vhost); |
| 3650 | } |
| 3651 | |
| 3652 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); |
| 3653 | return 0; |
| 3654 | } |
| 3655 | |
| 3656 | /** |
| 3657 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor |
| 3658 | * @vhost: ibmvfc host struct |
| 3659 | * |
| 3660 | * Allocates a page for messages, maps it for dma, and registers |
| 3661 | * the crq with the hypervisor. |
| 3662 | * |
| 3663 | * Return value: |
| 3664 | * zero on success / other on failure |
| 3665 | **/ |
| 3666 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) |
| 3667 | { |
| 3668 | int rc, retrc = -ENOMEM; |
| 3669 | struct device *dev = vhost->dev; |
| 3670 | struct vio_dev *vdev = to_vio_dev(dev); |
| 3671 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 3672 | |
| 3673 | ENTER; |
| 3674 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); |
| 3675 | |
| 3676 | if (!crq->msgs) |
| 3677 | return -ENOMEM; |
| 3678 | |
| 3679 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); |
| 3680 | crq->msg_token = dma_map_single(dev, crq->msgs, |
| 3681 | PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 3682 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 3683 | if (dma_mapping_error(dev, crq->msg_token)) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3684 | goto map_failed; |
| 3685 | |
| 3686 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| 3687 | crq->msg_token, PAGE_SIZE); |
| 3688 | |
| 3689 | if (rc == H_RESOURCE) |
| 3690 | /* maybe kexecing and resource is busy. try a reset */ |
| 3691 | retrc = rc = ibmvfc_reset_crq(vhost); |
| 3692 | |
| 3693 | if (rc == H_CLOSED) |
| 3694 | dev_warn(dev, "Partner adapter not ready\n"); |
| 3695 | else if (rc) { |
| 3696 | dev_warn(dev, "Error %d opening adapter\n", rc); |
| 3697 | goto reg_crq_failed; |
| 3698 | } |
| 3699 | |
| 3700 | retrc = 0; |
| 3701 | |
| 3702 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
| 3703 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); |
| 3704 | goto req_irq_failed; |
| 3705 | } |
| 3706 | |
| 3707 | if ((rc = vio_enable_interrupts(vdev))) { |
| 3708 | dev_err(dev, "Error %d enabling interrupts\n", rc); |
| 3709 | goto req_irq_failed; |
| 3710 | } |
| 3711 | |
| 3712 | crq->cur = 0; |
| 3713 | LEAVE; |
| 3714 | return retrc; |
| 3715 | |
| 3716 | req_irq_failed: |
| 3717 | do { |
| 3718 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 3719 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 3720 | reg_crq_failed: |
| 3721 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 3722 | map_failed: |
| 3723 | free_page((unsigned long)crq->msgs); |
| 3724 | return retrc; |
| 3725 | } |
| 3726 | |
| 3727 | /** |
| 3728 | * ibmvfc_free_mem - Free memory for vhost |
| 3729 | * @vhost: ibmvfc host struct |
| 3730 | * |
| 3731 | * Return value: |
| 3732 | * none |
| 3733 | **/ |
| 3734 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) |
| 3735 | { |
| 3736 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| 3737 | |
| 3738 | ENTER; |
| 3739 | mempool_destroy(vhost->tgt_pool); |
| 3740 | kfree(vhost->trace); |
| 3741 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, |
| 3742 | vhost->disc_buf_dma); |
| 3743 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), |
| 3744 | vhost->login_buf, vhost->login_buf_dma); |
| 3745 | dma_pool_destroy(vhost->sg_pool); |
| 3746 | dma_unmap_single(vhost->dev, async_q->msg_token, |
| 3747 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| 3748 | free_page((unsigned long)async_q->msgs); |
| 3749 | LEAVE; |
| 3750 | } |
| 3751 | |
| 3752 | /** |
| 3753 | * ibmvfc_alloc_mem - Allocate memory for vhost |
| 3754 | * @vhost: ibmvfc host struct |
| 3755 | * |
| 3756 | * Return value: |
| 3757 | * 0 on success / non-zero on failure |
| 3758 | **/ |
| 3759 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) |
| 3760 | { |
| 3761 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| 3762 | struct device *dev = vhost->dev; |
| 3763 | |
| 3764 | ENTER; |
| 3765 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); |
| 3766 | if (!async_q->msgs) { |
| 3767 | dev_err(dev, "Couldn't allocate async queue.\n"); |
| 3768 | goto nomem; |
| 3769 | } |
| 3770 | |
| 3771 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); |
| 3772 | async_q->msg_token = dma_map_single(dev, async_q->msgs, |
| 3773 | async_q->size * sizeof(*async_q->msgs), |
| 3774 | DMA_BIDIRECTIONAL); |
| 3775 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 3776 | if (dma_mapping_error(dev, async_q->msg_token)) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3777 | dev_err(dev, "Failed to map async queue\n"); |
| 3778 | goto free_async_crq; |
| 3779 | } |
| 3780 | |
| 3781 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, |
| 3782 | SG_ALL * sizeof(struct srp_direct_buf), |
| 3783 | sizeof(struct srp_direct_buf), 0); |
| 3784 | |
| 3785 | if (!vhost->sg_pool) { |
| 3786 | dev_err(dev, "Failed to allocate sg pool\n"); |
| 3787 | goto unmap_async_crq; |
| 3788 | } |
| 3789 | |
| 3790 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), |
| 3791 | &vhost->login_buf_dma, GFP_KERNEL); |
| 3792 | |
| 3793 | if (!vhost->login_buf) { |
| 3794 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); |
| 3795 | goto free_sg_pool; |
| 3796 | } |
| 3797 | |
| 3798 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; |
| 3799 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, |
| 3800 | &vhost->disc_buf_dma, GFP_KERNEL); |
| 3801 | |
| 3802 | if (!vhost->disc_buf) { |
| 3803 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); |
| 3804 | goto free_login_buffer; |
| 3805 | } |
| 3806 | |
| 3807 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, |
| 3808 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); |
| 3809 | |
| 3810 | if (!vhost->trace) |
| 3811 | goto free_disc_buffer; |
| 3812 | |
| 3813 | vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
| 3814 | sizeof(struct ibmvfc_target)); |
| 3815 | |
| 3816 | if (!vhost->tgt_pool) { |
| 3817 | dev_err(dev, "Couldn't allocate target memory pool\n"); |
| 3818 | goto free_trace; |
| 3819 | } |
| 3820 | |
| 3821 | LEAVE; |
| 3822 | return 0; |
| 3823 | |
| 3824 | free_trace: |
| 3825 | kfree(vhost->trace); |
| 3826 | free_disc_buffer: |
| 3827 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, |
| 3828 | vhost->disc_buf_dma); |
| 3829 | free_login_buffer: |
| 3830 | dma_free_coherent(dev, sizeof(*vhost->login_buf), |
| 3831 | vhost->login_buf, vhost->login_buf_dma); |
| 3832 | free_sg_pool: |
| 3833 | dma_pool_destroy(vhost->sg_pool); |
| 3834 | unmap_async_crq: |
| 3835 | dma_unmap_single(dev, async_q->msg_token, |
| 3836 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| 3837 | free_async_crq: |
| 3838 | free_page((unsigned long)async_q->msgs); |
| 3839 | nomem: |
| 3840 | LEAVE; |
| 3841 | return -ENOMEM; |
| 3842 | } |
| 3843 | |
| 3844 | /** |
| 3845 | * ibmvfc_probe - Adapter hot plug add entry point |
| 3846 | * @vdev: vio device struct |
| 3847 | * @id: vio device id struct |
| 3848 | * |
| 3849 | * Return value: |
| 3850 | * 0 on success / non-zero on failure |
| 3851 | **/ |
| 3852 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| 3853 | { |
| 3854 | struct ibmvfc_host *vhost; |
| 3855 | struct Scsi_Host *shost; |
| 3856 | struct device *dev = &vdev->dev; |
| 3857 | int rc = -ENOMEM; |
| 3858 | |
| 3859 | ENTER; |
| 3860 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); |
| 3861 | if (!shost) { |
| 3862 | dev_err(dev, "Couldn't allocate host data\n"); |
| 3863 | goto out; |
| 3864 | } |
| 3865 | |
| 3866 | shost->transportt = ibmvfc_transport_template; |
| 3867 | shost->can_queue = max_requests; |
| 3868 | shost->max_lun = max_lun; |
| 3869 | shost->max_id = max_targets; |
| 3870 | shost->max_sectors = IBMVFC_MAX_SECTORS; |
| 3871 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; |
| 3872 | shost->unique_id = shost->host_no; |
| 3873 | |
| 3874 | vhost = shost_priv(shost); |
| 3875 | INIT_LIST_HEAD(&vhost->sent); |
| 3876 | INIT_LIST_HEAD(&vhost->free); |
| 3877 | INIT_LIST_HEAD(&vhost->targets); |
| 3878 | sprintf(vhost->name, IBMVFC_NAME); |
| 3879 | vhost->host = shost; |
| 3880 | vhost->dev = dev; |
| 3881 | vhost->partition_number = -1; |
| 3882 | vhost->log_level = log_level; |
| 3883 | strcpy(vhost->partition_name, "UNKNOWN"); |
| 3884 | init_waitqueue_head(&vhost->work_wait_q); |
| 3885 | init_waitqueue_head(&vhost->init_wait_q); |
| 3886 | |
| 3887 | if ((rc = ibmvfc_alloc_mem(vhost))) |
| 3888 | goto free_scsi_host; |
| 3889 | |
| 3890 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, |
| 3891 | shost->host_no); |
| 3892 | |
| 3893 | if (IS_ERR(vhost->work_thread)) { |
| 3894 | dev_err(dev, "Couldn't create kernel thread: %ld\n", |
| 3895 | PTR_ERR(vhost->work_thread)); |
| 3896 | goto free_host_mem; |
| 3897 | } |
| 3898 | |
| 3899 | if ((rc = ibmvfc_init_crq(vhost))) { |
| 3900 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); |
| 3901 | goto kill_kthread; |
| 3902 | } |
| 3903 | |
| 3904 | if ((rc = ibmvfc_init_event_pool(vhost))) { |
| 3905 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); |
| 3906 | goto release_crq; |
| 3907 | } |
| 3908 | |
| 3909 | if ((rc = scsi_add_host(shost, dev))) |
| 3910 | goto release_event_pool; |
| 3911 | |
| 3912 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
| 3913 | &ibmvfc_trace_attr))) { |
| 3914 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); |
| 3915 | goto remove_shost; |
| 3916 | } |
| 3917 | |
| 3918 | dev_set_drvdata(dev, vhost); |
| 3919 | spin_lock(&ibmvfc_driver_lock); |
| 3920 | list_add_tail(&vhost->queue, &ibmvfc_head); |
| 3921 | spin_unlock(&ibmvfc_driver_lock); |
| 3922 | |
| 3923 | ibmvfc_send_crq_init(vhost); |
| 3924 | scsi_scan_host(shost); |
| 3925 | return 0; |
| 3926 | |
| 3927 | remove_shost: |
| 3928 | scsi_remove_host(shost); |
| 3929 | release_event_pool: |
| 3930 | ibmvfc_free_event_pool(vhost); |
| 3931 | release_crq: |
| 3932 | ibmvfc_release_crq_queue(vhost); |
| 3933 | kill_kthread: |
| 3934 | kthread_stop(vhost->work_thread); |
| 3935 | free_host_mem: |
| 3936 | ibmvfc_free_mem(vhost); |
| 3937 | free_scsi_host: |
| 3938 | scsi_host_put(shost); |
| 3939 | out: |
| 3940 | LEAVE; |
| 3941 | return rc; |
| 3942 | } |
| 3943 | |
| 3944 | /** |
| 3945 | * ibmvfc_remove - Adapter hot plug remove entry point |
| 3946 | * @vdev: vio device struct |
| 3947 | * |
| 3948 | * Return value: |
| 3949 | * 0 |
| 3950 | **/ |
| 3951 | static int ibmvfc_remove(struct vio_dev *vdev) |
| 3952 | { |
| 3953 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); |
| 3954 | unsigned long flags; |
| 3955 | |
| 3956 | ENTER; |
| 3957 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); |
Brian King | 2d0da2a | 2008-07-22 08:31:42 -0500 | [diff] [blame] | 3958 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 3959 | ibmvfc_wait_while_resetting(vhost); |
| 3960 | ibmvfc_release_crq_queue(vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3961 | kthread_stop(vhost->work_thread); |
| 3962 | fc_remove_host(vhost->host); |
| 3963 | scsi_remove_host(vhost->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3964 | |
| 3965 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3966 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 3967 | ibmvfc_free_event_pool(vhost); |
| 3968 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3969 | |
| 3970 | ibmvfc_free_mem(vhost); |
| 3971 | spin_lock(&ibmvfc_driver_lock); |
| 3972 | list_del(&vhost->queue); |
| 3973 | spin_unlock(&ibmvfc_driver_lock); |
| 3974 | scsi_host_put(vhost->host); |
| 3975 | LEAVE; |
| 3976 | return 0; |
| 3977 | } |
| 3978 | |
Brian King | 39c1ffe | 2008-07-24 04:35:48 +1000 | [diff] [blame] | 3979 | /** |
| 3980 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver |
| 3981 | * @vdev: vio device struct |
| 3982 | * |
| 3983 | * Return value: |
| 3984 | * Number of bytes the driver will need to DMA map at the same time in |
| 3985 | * order to perform well. |
| 3986 | */ |
| 3987 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) |
| 3988 | { |
| 3989 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); |
| 3990 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); |
| 3991 | } |
| 3992 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3993 | static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
| 3994 | {"fcp", "IBM,vfc-client"}, |
| 3995 | { "", "" } |
| 3996 | }; |
| 3997 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); |
| 3998 | |
| 3999 | static struct vio_driver ibmvfc_driver = { |
| 4000 | .id_table = ibmvfc_device_table, |
| 4001 | .probe = ibmvfc_probe, |
| 4002 | .remove = ibmvfc_remove, |
Brian King | 39c1ffe | 2008-07-24 04:35:48 +1000 | [diff] [blame] | 4003 | .get_desired_dma = ibmvfc_get_desired_dma, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 4004 | .driver = { |
| 4005 | .name = IBMVFC_NAME, |
| 4006 | .owner = THIS_MODULE, |
| 4007 | } |
| 4008 | }; |
| 4009 | |
| 4010 | static struct fc_function_template ibmvfc_transport_functions = { |
| 4011 | .show_host_fabric_name = 1, |
| 4012 | .show_host_node_name = 1, |
| 4013 | .show_host_port_name = 1, |
| 4014 | .show_host_supported_classes = 1, |
| 4015 | .show_host_port_type = 1, |
| 4016 | .show_host_port_id = 1, |
| 4017 | |
| 4018 | .get_host_port_state = ibmvfc_get_host_port_state, |
| 4019 | .show_host_port_state = 1, |
| 4020 | |
| 4021 | .get_host_speed = ibmvfc_get_host_speed, |
| 4022 | .show_host_speed = 1, |
| 4023 | |
| 4024 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, |
| 4025 | .terminate_rport_io = ibmvfc_terminate_rport_io, |
| 4026 | |
| 4027 | .show_rport_maxframe_size = 1, |
| 4028 | .show_rport_supported_classes = 1, |
| 4029 | |
| 4030 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, |
| 4031 | .show_rport_dev_loss_tmo = 1, |
| 4032 | |
| 4033 | .get_starget_node_name = ibmvfc_get_starget_node_name, |
| 4034 | .show_starget_node_name = 1, |
| 4035 | |
| 4036 | .get_starget_port_name = ibmvfc_get_starget_port_name, |
| 4037 | .show_starget_port_name = 1, |
| 4038 | |
| 4039 | .get_starget_port_id = ibmvfc_get_starget_port_id, |
| 4040 | .show_starget_port_id = 1, |
| 4041 | }; |
| 4042 | |
| 4043 | /** |
| 4044 | * ibmvfc_module_init - Initialize the ibmvfc module |
| 4045 | * |
| 4046 | * Return value: |
| 4047 | * 0 on success / other on failure |
| 4048 | **/ |
| 4049 | static int __init ibmvfc_module_init(void) |
| 4050 | { |
| 4051 | int rc; |
| 4052 | |
| 4053 | if (!firmware_has_feature(FW_FEATURE_VIO)) |
| 4054 | return -ENODEV; |
| 4055 | |
| 4056 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", |
| 4057 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); |
| 4058 | |
| 4059 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); |
| 4060 | if (!ibmvfc_transport_template) |
| 4061 | return -ENOMEM; |
| 4062 | |
| 4063 | rc = vio_register_driver(&ibmvfc_driver); |
| 4064 | if (rc) |
| 4065 | fc_release_transport(ibmvfc_transport_template); |
| 4066 | return rc; |
| 4067 | } |
| 4068 | |
| 4069 | /** |
| 4070 | * ibmvfc_module_exit - Teardown the ibmvfc module |
| 4071 | * |
| 4072 | * Return value: |
| 4073 | * nothing |
| 4074 | **/ |
| 4075 | static void __exit ibmvfc_module_exit(void) |
| 4076 | { |
| 4077 | vio_unregister_driver(&ibmvfc_driver); |
| 4078 | fc_release_transport(ibmvfc_transport_template); |
| 4079 | } |
| 4080 | |
| 4081 | module_init(ibmvfc_module_init); |
| 4082 | module_exit(ibmvfc_module_exit); |