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 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 281 | err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| 282 | if (err >= 0) |
| 283 | return rsp->scsi_status | (cmd_status[err].result << 16); |
| 284 | return rsp->scsi_status | (DID_ERROR << 16); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * ibmvfc_retry_cmd - Determine if error status is retryable |
| 289 | * @status: status / error class |
| 290 | * @error: error |
| 291 | * |
| 292 | * Return value: |
| 293 | * 1 if error should be retried / 0 if it should not |
| 294 | **/ |
| 295 | static int ibmvfc_retry_cmd(u16 status, u16 error) |
| 296 | { |
| 297 | int rc = ibmvfc_get_err_index(status, error); |
| 298 | |
| 299 | if (rc >= 0) |
| 300 | return cmd_status[rc].retry; |
| 301 | return 1; |
| 302 | } |
| 303 | |
| 304 | static const char *unknown_fc_explain = "unknown fc explain"; |
| 305 | |
| 306 | static const struct { |
| 307 | u16 fc_explain; |
| 308 | char *name; |
| 309 | } ls_explain [] = { |
| 310 | { 0x00, "no additional explanation" }, |
| 311 | { 0x01, "service parameter error - options" }, |
| 312 | { 0x03, "service parameter error - initiator control" }, |
| 313 | { 0x05, "service parameter error - recipient control" }, |
| 314 | { 0x07, "service parameter error - received data field size" }, |
| 315 | { 0x09, "service parameter error - concurrent seq" }, |
| 316 | { 0x0B, "service parameter error - credit" }, |
| 317 | { 0x0D, "invalid N_Port/F_Port_Name" }, |
| 318 | { 0x0E, "invalid node/Fabric Name" }, |
| 319 | { 0x0F, "invalid common service parameters" }, |
| 320 | { 0x11, "invalid association header" }, |
| 321 | { 0x13, "association header required" }, |
| 322 | { 0x15, "invalid originator S_ID" }, |
| 323 | { 0x17, "invalid OX_ID-RX-ID combination" }, |
| 324 | { 0x19, "command (request) already in progress" }, |
| 325 | { 0x1E, "N_Port Login requested" }, |
| 326 | { 0x1F, "Invalid N_Port_ID" }, |
| 327 | }; |
| 328 | |
| 329 | static const struct { |
| 330 | u16 fc_explain; |
| 331 | char *name; |
| 332 | } gs_explain [] = { |
| 333 | { 0x00, "no additional explanation" }, |
| 334 | { 0x01, "port identifier not registered" }, |
| 335 | { 0x02, "port name not registered" }, |
| 336 | { 0x03, "node name not registered" }, |
| 337 | { 0x04, "class of service not registered" }, |
| 338 | { 0x06, "initial process associator not registered" }, |
| 339 | { 0x07, "FC-4 TYPEs not registered" }, |
| 340 | { 0x08, "symbolic port name not registered" }, |
| 341 | { 0x09, "symbolic node name not registered" }, |
| 342 | { 0x0A, "port type not registered" }, |
| 343 | { 0xF0, "authorization exception" }, |
| 344 | { 0xF1, "authentication exception" }, |
| 345 | { 0xF2, "data base full" }, |
| 346 | { 0xF3, "data base empty" }, |
| 347 | { 0xF4, "processing request" }, |
| 348 | { 0xF5, "unable to verify connection" }, |
| 349 | { 0xF6, "devices not in a common zone" }, |
| 350 | }; |
| 351 | |
| 352 | /** |
| 353 | * ibmvfc_get_ls_explain - Return the FC Explain description text |
| 354 | * @status: FC Explain status |
| 355 | * |
| 356 | * Returns: |
| 357 | * error string |
| 358 | **/ |
| 359 | static const char *ibmvfc_get_ls_explain(u16 status) |
| 360 | { |
| 361 | int i; |
| 362 | |
| 363 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) |
| 364 | if (ls_explain[i].fc_explain == status) |
| 365 | return ls_explain[i].name; |
| 366 | |
| 367 | return unknown_fc_explain; |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * ibmvfc_get_gs_explain - Return the FC Explain description text |
| 372 | * @status: FC Explain status |
| 373 | * |
| 374 | * Returns: |
| 375 | * error string |
| 376 | **/ |
| 377 | static const char *ibmvfc_get_gs_explain(u16 status) |
| 378 | { |
| 379 | int i; |
| 380 | |
| 381 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) |
| 382 | if (gs_explain[i].fc_explain == status) |
| 383 | return gs_explain[i].name; |
| 384 | |
| 385 | return unknown_fc_explain; |
| 386 | } |
| 387 | |
| 388 | static const struct { |
| 389 | enum ibmvfc_fc_type fc_type; |
| 390 | char *name; |
| 391 | } fc_type [] = { |
| 392 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, |
| 393 | { IBMVFC_PORT_REJECT, "port reject" }, |
| 394 | { IBMVFC_LS_REJECT, "ELS reject" }, |
| 395 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, |
| 396 | { IBMVFC_PORT_BUSY, "port busy" }, |
| 397 | { IBMVFC_BASIC_REJECT, "basic reject" }, |
| 398 | }; |
| 399 | |
| 400 | static const char *unknown_fc_type = "unknown fc type"; |
| 401 | |
| 402 | /** |
| 403 | * ibmvfc_get_fc_type - Return the FC Type description text |
| 404 | * @status: FC Type error status |
| 405 | * |
| 406 | * Returns: |
| 407 | * error string |
| 408 | **/ |
| 409 | static const char *ibmvfc_get_fc_type(u16 status) |
| 410 | { |
| 411 | int i; |
| 412 | |
| 413 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) |
| 414 | if (fc_type[i].fc_type == status) |
| 415 | return fc_type[i].name; |
| 416 | |
| 417 | return unknown_fc_type; |
| 418 | } |
| 419 | |
| 420 | /** |
| 421 | * ibmvfc_set_tgt_action - Set the next init action for the target |
| 422 | * @tgt: ibmvfc target struct |
| 423 | * @action: action to perform |
| 424 | * |
| 425 | **/ |
| 426 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, |
| 427 | enum ibmvfc_target_action action) |
| 428 | { |
| 429 | switch (tgt->action) { |
| 430 | case IBMVFC_TGT_ACTION_DEL_RPORT: |
| 431 | break; |
| 432 | default: |
| 433 | tgt->action = action; |
| 434 | break; |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * ibmvfc_set_host_state - Set the state for the host |
| 440 | * @vhost: ibmvfc host struct |
| 441 | * @state: state to set host to |
| 442 | * |
| 443 | * Returns: |
| 444 | * 0 if state changed / non-zero if not changed |
| 445 | **/ |
| 446 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, |
| 447 | enum ibmvfc_host_state state) |
| 448 | { |
| 449 | int rc = 0; |
| 450 | |
| 451 | switch (vhost->state) { |
| 452 | case IBMVFC_HOST_OFFLINE: |
| 453 | rc = -EINVAL; |
| 454 | break; |
| 455 | default: |
| 456 | vhost->state = state; |
| 457 | break; |
| 458 | }; |
| 459 | |
| 460 | return rc; |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * ibmvfc_set_host_action - Set the next init action for the host |
| 465 | * @vhost: ibmvfc host struct |
| 466 | * @action: action to perform |
| 467 | * |
| 468 | **/ |
| 469 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, |
| 470 | enum ibmvfc_host_action action) |
| 471 | { |
| 472 | switch (action) { |
| 473 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 474 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) |
| 475 | vhost->action = action; |
| 476 | break; |
| 477 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 478 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) |
| 479 | vhost->action = action; |
| 480 | break; |
| 481 | case IBMVFC_HOST_ACTION_QUERY: |
| 482 | switch (vhost->action) { |
| 483 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 484 | case IBMVFC_HOST_ACTION_NONE: |
| 485 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 486 | vhost->action = action; |
| 487 | break; |
| 488 | default: |
| 489 | break; |
| 490 | }; |
| 491 | break; |
| 492 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 493 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) |
| 494 | vhost->action = action; |
| 495 | break; |
| 496 | case IBMVFC_HOST_ACTION_INIT: |
| 497 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 498 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 499 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 500 | case IBMVFC_HOST_ACTION_NONE: |
| 501 | default: |
| 502 | vhost->action = action; |
| 503 | break; |
| 504 | }; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) |
| 509 | * @vhost: ibmvfc host struct |
| 510 | * |
| 511 | * Return value: |
| 512 | * nothing |
| 513 | **/ |
| 514 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) |
| 515 | { |
| 516 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { |
Brian King | 2d0da2a | 2008-07-22 08:31:42 -0500 | [diff] [blame] | 517 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| 518 | scsi_block_requests(vhost->host); |
| 519 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 520 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 521 | } else |
| 522 | vhost->reinit = 1; |
| 523 | |
| 524 | wake_up(&vhost->work_wait_q); |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * ibmvfc_link_down - Handle a link down event from the adapter |
| 529 | * @vhost: ibmvfc host struct |
| 530 | * @state: ibmvfc host state to enter |
| 531 | * |
| 532 | **/ |
| 533 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, |
| 534 | enum ibmvfc_host_state state) |
| 535 | { |
| 536 | struct ibmvfc_target *tgt; |
| 537 | |
| 538 | ENTER; |
| 539 | scsi_block_requests(vhost->host); |
| 540 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 541 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 542 | ibmvfc_set_host_state(vhost, state); |
| 543 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| 544 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; |
| 545 | wake_up(&vhost->work_wait_q); |
| 546 | LEAVE; |
| 547 | } |
| 548 | |
| 549 | /** |
| 550 | * ibmvfc_init_host - Start host initialization |
| 551 | * @vhost: ibmvfc host struct |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 552 | * @relogin: is this a re-login? |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 553 | * |
| 554 | * Return value: |
| 555 | * nothing |
| 556 | **/ |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 557 | static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 558 | { |
| 559 | struct ibmvfc_target *tgt; |
| 560 | |
| 561 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| 562 | if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| 563 | dev_err(vhost->dev, |
| 564 | "Host initialization retries exceeded. Taking adapter offline\n"); |
| 565 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 566 | return; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 571 | if (!relogin) { |
| 572 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
| 573 | vhost->async_crq.cur = 0; |
| 574 | } |
| 575 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 576 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 577 | tgt->need_login = 1; |
| 578 | scsi_block_requests(vhost->host); |
| 579 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 580 | vhost->job_step = ibmvfc_npiv_login; |
| 581 | wake_up(&vhost->work_wait_q); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * ibmvfc_send_crq - Send a CRQ |
| 587 | * @vhost: ibmvfc host struct |
| 588 | * @word1: the first 64 bits of the data |
| 589 | * @word2: the second 64 bits of the data |
| 590 | * |
| 591 | * Return value: |
| 592 | * 0 on success / other on failure |
| 593 | **/ |
| 594 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) |
| 595 | { |
| 596 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 597 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); |
| 598 | } |
| 599 | |
| 600 | /** |
| 601 | * ibmvfc_send_crq_init - Send a CRQ init message |
| 602 | * @vhost: ibmvfc host struct |
| 603 | * |
| 604 | * Return value: |
| 605 | * 0 on success / other on failure |
| 606 | **/ |
| 607 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) |
| 608 | { |
| 609 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); |
| 610 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); |
| 611 | } |
| 612 | |
| 613 | /** |
| 614 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message |
| 615 | * @vhost: ibmvfc host struct |
| 616 | * |
| 617 | * Return value: |
| 618 | * 0 on success / other on failure |
| 619 | **/ |
| 620 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) |
| 621 | { |
| 622 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); |
| 623 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); |
| 624 | } |
| 625 | |
| 626 | /** |
| 627 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ |
| 628 | * @vhost: ibmvfc host struct |
| 629 | * |
| 630 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters |
| 631 | * the crq with the hypervisor. |
| 632 | **/ |
| 633 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) |
| 634 | { |
| 635 | long rc; |
| 636 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 637 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 638 | |
| 639 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); |
| 640 | free_irq(vdev->irq, vhost); |
| 641 | do { |
| 642 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 643 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 644 | |
| 645 | vhost->state = IBMVFC_NO_CRQ; |
| 646 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 647 | free_page((unsigned long)crq->msgs); |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * ibmvfc_reenable_crq_queue - reenables the CRQ |
| 652 | * @vhost: ibmvfc host struct |
| 653 | * |
| 654 | * Return value: |
| 655 | * 0 on success / other on failure |
| 656 | **/ |
| 657 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) |
| 658 | { |
| 659 | int rc; |
| 660 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 661 | |
| 662 | /* Re-enable the CRQ */ |
| 663 | do { |
| 664 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
| 665 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 666 | |
| 667 | if (rc) |
| 668 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); |
| 669 | |
| 670 | return rc; |
| 671 | } |
| 672 | |
| 673 | /** |
| 674 | * ibmvfc_reset_crq - resets a crq after a failure |
| 675 | * @vhost: ibmvfc host struct |
| 676 | * |
| 677 | * Return value: |
| 678 | * 0 on success / other on failure |
| 679 | **/ |
| 680 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) |
| 681 | { |
| 682 | int rc; |
| 683 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 684 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 685 | |
| 686 | /* Close the CRQ */ |
| 687 | do { |
| 688 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 689 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 690 | |
| 691 | vhost->state = IBMVFC_NO_CRQ; |
| 692 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 693 | |
| 694 | /* Clean out the queue */ |
| 695 | memset(crq->msgs, 0, PAGE_SIZE); |
| 696 | crq->cur = 0; |
| 697 | |
| 698 | /* And re-open it again */ |
| 699 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| 700 | crq->msg_token, PAGE_SIZE); |
| 701 | |
| 702 | if (rc == H_CLOSED) |
| 703 | /* Adapter is good, but other end is not ready */ |
| 704 | dev_warn(vhost->dev, "Partner adapter not ready\n"); |
| 705 | else if (rc != 0) |
| 706 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); |
| 707 | |
| 708 | return rc; |
| 709 | } |
| 710 | |
| 711 | /** |
| 712 | * ibmvfc_valid_event - Determines if event is valid. |
| 713 | * @pool: event_pool that contains the event |
| 714 | * @evt: ibmvfc event to be checked for validity |
| 715 | * |
| 716 | * Return value: |
| 717 | * 1 if event is valid / 0 if event is not valid |
| 718 | **/ |
| 719 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, |
| 720 | struct ibmvfc_event *evt) |
| 721 | { |
| 722 | int index = evt - pool->events; |
| 723 | if (index < 0 || index >= pool->size) /* outside of bounds */ |
| 724 | return 0; |
| 725 | if (evt != pool->events + index) /* unaligned */ |
| 726 | return 0; |
| 727 | return 1; |
| 728 | } |
| 729 | |
| 730 | /** |
| 731 | * ibmvfc_free_event - Free the specified event |
| 732 | * @evt: ibmvfc_event to be freed |
| 733 | * |
| 734 | **/ |
| 735 | static void ibmvfc_free_event(struct ibmvfc_event *evt) |
| 736 | { |
| 737 | struct ibmvfc_host *vhost = evt->vhost; |
| 738 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 739 | |
| 740 | BUG_ON(!ibmvfc_valid_event(pool, evt)); |
| 741 | BUG_ON(atomic_inc_return(&evt->free) != 1); |
| 742 | list_add_tail(&evt->queue, &vhost->free); |
| 743 | } |
| 744 | |
| 745 | /** |
| 746 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands |
| 747 | * @evt: ibmvfc event struct |
| 748 | * |
| 749 | * This function does not setup any error status, that must be done |
| 750 | * before this function gets called. |
| 751 | **/ |
| 752 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) |
| 753 | { |
| 754 | struct scsi_cmnd *cmnd = evt->cmnd; |
| 755 | |
| 756 | if (cmnd) { |
| 757 | scsi_dma_unmap(cmnd); |
| 758 | cmnd->scsi_done(cmnd); |
| 759 | } |
| 760 | |
| 761 | ibmvfc_free_event(evt); |
| 762 | } |
| 763 | |
| 764 | /** |
| 765 | * ibmvfc_fail_request - Fail request with specified error code |
| 766 | * @evt: ibmvfc event struct |
| 767 | * @error_code: error code to fail request with |
| 768 | * |
| 769 | * Return value: |
| 770 | * none |
| 771 | **/ |
| 772 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) |
| 773 | { |
| 774 | if (evt->cmnd) { |
| 775 | evt->cmnd->result = (error_code << 16); |
| 776 | evt->done = ibmvfc_scsi_eh_done; |
| 777 | } else |
| 778 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; |
| 779 | |
| 780 | list_del(&evt->queue); |
| 781 | del_timer(&evt->timer); |
| 782 | ibmvfc_trc_end(evt); |
| 783 | evt->done(evt); |
| 784 | } |
| 785 | |
| 786 | /** |
| 787 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests |
| 788 | * @vhost: ibmvfc host struct |
| 789 | * @error_code: error code to fail requests with |
| 790 | * |
| 791 | * Return value: |
| 792 | * none |
| 793 | **/ |
| 794 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) |
| 795 | { |
| 796 | struct ibmvfc_event *evt, *pos; |
| 797 | |
| 798 | ibmvfc_dbg(vhost, "Purging all requests\n"); |
| 799 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) |
| 800 | ibmvfc_fail_request(evt, error_code); |
| 801 | } |
| 802 | |
| 803 | /** |
| 804 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
| 805 | * @vhost: struct ibmvfc host to reset |
| 806 | **/ |
| 807 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| 808 | { |
| 809 | int rc; |
| 810 | |
| 811 | scsi_block_requests(vhost->host); |
| 812 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 813 | if ((rc = ibmvfc_reset_crq(vhost)) || |
| 814 | (rc = ibmvfc_send_crq_init(vhost)) || |
| 815 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { |
| 816 | dev_err(vhost->dev, "Error after reset rc=%d\n", rc); |
| 817 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 818 | } else |
| 819 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 820 | } |
| 821 | |
| 822 | /** |
| 823 | * ibmvfc_reset_host - Reset the connection to the server |
| 824 | * @vhost: struct ibmvfc host to reset |
| 825 | **/ |
| 826 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| 827 | { |
| 828 | unsigned long flags; |
| 829 | |
| 830 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 831 | __ibmvfc_reset_host(vhost); |
| 832 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 833 | } |
| 834 | |
| 835 | /** |
| 836 | * ibmvfc_retry_host_init - Retry host initialization if allowed |
| 837 | * @vhost: ibmvfc host struct |
| 838 | * |
| 839 | **/ |
| 840 | static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
| 841 | { |
| 842 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| 843 | if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| 844 | dev_err(vhost->dev, |
| 845 | "Host initialization retries exceeded. Taking adapter offline\n"); |
| 846 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 847 | } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) |
| 848 | __ibmvfc_reset_host(vhost); |
| 849 | else |
| 850 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 851 | } |
| 852 | |
| 853 | wake_up(&vhost->work_wait_q); |
| 854 | } |
| 855 | |
| 856 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 857 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 858 | * @starget: scsi target struct |
| 859 | * |
| 860 | * Return value: |
| 861 | * ibmvfc_target struct / NULL if not found |
| 862 | **/ |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 863 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 864 | { |
| 865 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 866 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 867 | struct ibmvfc_target *tgt; |
| 868 | |
| 869 | list_for_each_entry(tgt, &vhost->targets, queue) |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 870 | if (tgt->target_id == starget->id) { |
| 871 | kref_get(&tgt->kref); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 872 | return tgt; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 873 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 874 | return NULL; |
| 875 | } |
| 876 | |
| 877 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 878 | * ibmvfc_get_target - Find the specified scsi_target |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 879 | * @starget: scsi target struct |
| 880 | * |
| 881 | * Return value: |
| 882 | * ibmvfc_target struct / NULL if not found |
| 883 | **/ |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 884 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 885 | { |
| 886 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 887 | struct ibmvfc_target *tgt; |
| 888 | unsigned long flags; |
| 889 | |
| 890 | spin_lock_irqsave(shost->host_lock, flags); |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 891 | tgt = __ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 892 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 893 | return tgt; |
| 894 | } |
| 895 | |
| 896 | /** |
| 897 | * ibmvfc_get_host_speed - Get host port speed |
| 898 | * @shost: scsi host struct |
| 899 | * |
| 900 | * Return value: |
| 901 | * none |
| 902 | **/ |
| 903 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) |
| 904 | { |
| 905 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 906 | unsigned long flags; |
| 907 | |
| 908 | spin_lock_irqsave(shost->host_lock, flags); |
| 909 | if (vhost->state == IBMVFC_ACTIVE) { |
| 910 | switch (vhost->login_buf->resp.link_speed / 100) { |
| 911 | case 1: |
| 912 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; |
| 913 | break; |
| 914 | case 2: |
| 915 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; |
| 916 | break; |
| 917 | case 4: |
| 918 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; |
| 919 | break; |
| 920 | case 8: |
| 921 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; |
| 922 | break; |
| 923 | case 10: |
| 924 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; |
| 925 | break; |
| 926 | case 16: |
| 927 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; |
| 928 | break; |
| 929 | default: |
| 930 | ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", |
| 931 | vhost->login_buf->resp.link_speed / 100); |
| 932 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| 933 | break; |
| 934 | } |
| 935 | } else |
| 936 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| 937 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 938 | } |
| 939 | |
| 940 | /** |
| 941 | * ibmvfc_get_host_port_state - Get host port state |
| 942 | * @shost: scsi host struct |
| 943 | * |
| 944 | * Return value: |
| 945 | * none |
| 946 | **/ |
| 947 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) |
| 948 | { |
| 949 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 950 | unsigned long flags; |
| 951 | |
| 952 | spin_lock_irqsave(shost->host_lock, flags); |
| 953 | switch (vhost->state) { |
| 954 | case IBMVFC_INITIALIZING: |
| 955 | case IBMVFC_ACTIVE: |
| 956 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
| 957 | break; |
| 958 | case IBMVFC_LINK_DOWN: |
| 959 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
| 960 | break; |
| 961 | case IBMVFC_LINK_DEAD: |
| 962 | case IBMVFC_HOST_OFFLINE: |
| 963 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; |
| 964 | break; |
| 965 | case IBMVFC_HALTED: |
| 966 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; |
| 967 | break; |
Brian King | 0ae808e | 2008-07-22 08:31:39 -0500 | [diff] [blame] | 968 | case IBMVFC_NO_CRQ: |
| 969 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 970 | break; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 971 | default: |
| 972 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); |
| 973 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 974 | break; |
| 975 | } |
| 976 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 977 | } |
| 978 | |
| 979 | /** |
| 980 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout |
| 981 | * @rport: rport struct |
| 982 | * @timeout: timeout value |
| 983 | * |
| 984 | * Return value: |
| 985 | * none |
| 986 | **/ |
| 987 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
| 988 | { |
| 989 | if (timeout) |
| 990 | rport->dev_loss_tmo = timeout; |
| 991 | else |
| 992 | rport->dev_loss_tmo = 1; |
| 993 | } |
| 994 | |
| 995 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 996 | * ibmvfc_release_tgt - Free memory allocated for a target |
| 997 | * @kref: kref struct |
| 998 | * |
| 999 | **/ |
| 1000 | static void ibmvfc_release_tgt(struct kref *kref) |
| 1001 | { |
| 1002 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); |
| 1003 | kfree(tgt); |
| 1004 | } |
| 1005 | |
| 1006 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1007 | * ibmvfc_get_starget_node_name - Get SCSI target's node name |
| 1008 | * @starget: scsi target struct |
| 1009 | * |
| 1010 | * Return value: |
| 1011 | * none |
| 1012 | **/ |
| 1013 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) |
| 1014 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1015 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1016 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1017 | if (tgt) |
| 1018 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1019 | } |
| 1020 | |
| 1021 | /** |
| 1022 | * ibmvfc_get_starget_port_name - Get SCSI target's port name |
| 1023 | * @starget: scsi target struct |
| 1024 | * |
| 1025 | * Return value: |
| 1026 | * none |
| 1027 | **/ |
| 1028 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) |
| 1029 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1030 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1031 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1032 | if (tgt) |
| 1033 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | /** |
| 1037 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID |
| 1038 | * @starget: scsi target struct |
| 1039 | * |
| 1040 | * Return value: |
| 1041 | * none |
| 1042 | **/ |
| 1043 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) |
| 1044 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1045 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1046 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1047 | if (tgt) |
| 1048 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | /** |
| 1052 | * ibmvfc_wait_while_resetting - Wait while the host resets |
| 1053 | * @vhost: ibmvfc host struct |
| 1054 | * |
| 1055 | * Return value: |
| 1056 | * 0 on success / other on failure |
| 1057 | **/ |
| 1058 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) |
| 1059 | { |
| 1060 | long timeout = wait_event_timeout(vhost->init_wait_q, |
Brian King | 3eddc56 | 2008-08-15 10:59:21 -0500 | [diff] [blame] | 1061 | ((vhost->state == IBMVFC_ACTIVE || |
| 1062 | vhost->state == IBMVFC_HOST_OFFLINE || |
| 1063 | vhost->state == IBMVFC_LINK_DEAD) && |
| 1064 | vhost->action == IBMVFC_HOST_ACTION_NONE), |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1065 | (init_timeout * HZ)); |
| 1066 | |
| 1067 | return timeout ? 0 : -EIO; |
| 1068 | } |
| 1069 | |
| 1070 | /** |
| 1071 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization |
| 1072 | * @shost: scsi host struct |
| 1073 | * |
| 1074 | * Return value: |
| 1075 | * 0 on success / other on failure |
| 1076 | **/ |
| 1077 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) |
| 1078 | { |
| 1079 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 1080 | |
| 1081 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); |
| 1082 | ibmvfc_reset_host(vhost); |
| 1083 | return ibmvfc_wait_while_resetting(vhost); |
| 1084 | } |
| 1085 | |
| 1086 | /** |
| 1087 | * ibmvfc_gather_partition_info - Gather info about the LPAR |
| 1088 | * |
| 1089 | * Return value: |
| 1090 | * none |
| 1091 | **/ |
| 1092 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) |
| 1093 | { |
| 1094 | struct device_node *rootdn; |
| 1095 | const char *name; |
| 1096 | const unsigned int *num; |
| 1097 | |
| 1098 | rootdn = of_find_node_by_path("/"); |
| 1099 | if (!rootdn) |
| 1100 | return; |
| 1101 | |
| 1102 | name = of_get_property(rootdn, "ibm,partition-name", NULL); |
| 1103 | if (name) |
| 1104 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); |
| 1105 | num = of_get_property(rootdn, "ibm,partition-no", NULL); |
| 1106 | if (num) |
| 1107 | vhost->partition_number = *num; |
| 1108 | of_node_put(rootdn); |
| 1109 | } |
| 1110 | |
| 1111 | /** |
| 1112 | * ibmvfc_set_login_info - Setup info for NPIV login |
| 1113 | * @vhost: ibmvfc host struct |
| 1114 | * |
| 1115 | * Return value: |
| 1116 | * none |
| 1117 | **/ |
| 1118 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) |
| 1119 | { |
| 1120 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; |
| 1121 | struct device_node *of_node = vhost->dev->archdata.of_node; |
| 1122 | const char *location; |
| 1123 | |
| 1124 | memset(login_info, 0, sizeof(*login_info)); |
| 1125 | |
| 1126 | login_info->ostype = IBMVFC_OS_LINUX; |
| 1127 | login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; |
| 1128 | login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); |
| 1129 | login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); |
| 1130 | login_info->partition_num = vhost->partition_number; |
| 1131 | login_info->vfc_frame_version = 1; |
| 1132 | login_info->fcp_version = 3; |
| 1133 | if (vhost->client_migrated) |
| 1134 | login_info->flags = IBMVFC_CLIENT_MIGRATED; |
| 1135 | |
| 1136 | login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| 1137 | login_info->capabilities = IBMVFC_CAN_MIGRATE; |
| 1138 | login_info->async.va = vhost->async_crq.msg_token; |
Brian King | 52d7e86 | 2008-07-22 08:31:46 -0500 | [diff] [blame] | 1139 | 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] | 1140 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
| 1141 | strncpy(login_info->device_name, |
| 1142 | vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); |
| 1143 | |
| 1144 | location = of_get_property(of_node, "ibm,loc-code", NULL); |
| 1145 | location = location ? location : vhost->dev->bus_id; |
| 1146 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
| 1147 | } |
| 1148 | |
| 1149 | /** |
| 1150 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host |
| 1151 | * @vhost: ibmvfc host who owns the event pool |
| 1152 | * |
| 1153 | * Returns zero on success. |
| 1154 | **/ |
| 1155 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) |
| 1156 | { |
| 1157 | int i; |
| 1158 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 1159 | |
| 1160 | ENTER; |
| 1161 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| 1162 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); |
| 1163 | if (!pool->events) |
| 1164 | return -ENOMEM; |
| 1165 | |
| 1166 | pool->iu_storage = dma_alloc_coherent(vhost->dev, |
| 1167 | pool->size * sizeof(*pool->iu_storage), |
| 1168 | &pool->iu_token, 0); |
| 1169 | |
| 1170 | if (!pool->iu_storage) { |
| 1171 | kfree(pool->events); |
| 1172 | return -ENOMEM; |
| 1173 | } |
| 1174 | |
| 1175 | for (i = 0; i < pool->size; ++i) { |
| 1176 | struct ibmvfc_event *evt = &pool->events[i]; |
| 1177 | atomic_set(&evt->free, 1); |
| 1178 | evt->crq.valid = 0x80; |
| 1179 | evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); |
| 1180 | evt->xfer_iu = pool->iu_storage + i; |
| 1181 | evt->vhost = vhost; |
| 1182 | evt->ext_list = NULL; |
| 1183 | list_add_tail(&evt->queue, &vhost->free); |
| 1184 | } |
| 1185 | |
| 1186 | LEAVE; |
| 1187 | return 0; |
| 1188 | } |
| 1189 | |
| 1190 | /** |
| 1191 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host |
| 1192 | * @vhost: ibmvfc host who owns the event pool |
| 1193 | * |
| 1194 | **/ |
| 1195 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) |
| 1196 | { |
| 1197 | int i; |
| 1198 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 1199 | |
| 1200 | ENTER; |
| 1201 | for (i = 0; i < pool->size; ++i) { |
| 1202 | list_del(&pool->events[i].queue); |
| 1203 | BUG_ON(atomic_read(&pool->events[i].free) != 1); |
| 1204 | if (pool->events[i].ext_list) |
| 1205 | dma_pool_free(vhost->sg_pool, |
| 1206 | pool->events[i].ext_list, |
| 1207 | pool->events[i].ext_list_token); |
| 1208 | } |
| 1209 | |
| 1210 | kfree(pool->events); |
| 1211 | dma_free_coherent(vhost->dev, |
| 1212 | pool->size * sizeof(*pool->iu_storage), |
| 1213 | pool->iu_storage, pool->iu_token); |
| 1214 | LEAVE; |
| 1215 | } |
| 1216 | |
| 1217 | /** |
| 1218 | * ibmvfc_get_event - Gets the next free event in pool |
| 1219 | * @vhost: ibmvfc host struct |
| 1220 | * |
| 1221 | * Returns a free event from the pool. |
| 1222 | **/ |
| 1223 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) |
| 1224 | { |
| 1225 | struct ibmvfc_event *evt; |
| 1226 | |
| 1227 | BUG_ON(list_empty(&vhost->free)); |
| 1228 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); |
| 1229 | atomic_set(&evt->free, 0); |
| 1230 | list_del(&evt->queue); |
| 1231 | return evt; |
| 1232 | } |
| 1233 | |
| 1234 | /** |
| 1235 | * ibmvfc_init_event - Initialize fields in an event struct that are always |
| 1236 | * required. |
| 1237 | * @evt: The event |
| 1238 | * @done: Routine to call when the event is responded to |
| 1239 | * @format: SRP or MAD format |
| 1240 | **/ |
| 1241 | static void ibmvfc_init_event(struct ibmvfc_event *evt, |
| 1242 | void (*done) (struct ibmvfc_event *), u8 format) |
| 1243 | { |
| 1244 | evt->cmnd = NULL; |
| 1245 | evt->sync_iu = NULL; |
| 1246 | evt->crq.format = format; |
| 1247 | evt->done = done; |
| 1248 | } |
| 1249 | |
| 1250 | /** |
| 1251 | * ibmvfc_map_sg_list - Initialize scatterlist |
| 1252 | * @scmd: scsi command struct |
| 1253 | * @nseg: number of scatterlist segments |
| 1254 | * @md: memory descriptor list to initialize |
| 1255 | **/ |
| 1256 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, |
| 1257 | struct srp_direct_buf *md) |
| 1258 | { |
| 1259 | int i; |
| 1260 | struct scatterlist *sg; |
| 1261 | |
| 1262 | scsi_for_each_sg(scmd, sg, nseg, i) { |
| 1263 | md[i].va = sg_dma_address(sg); |
| 1264 | md[i].len = sg_dma_len(sg); |
| 1265 | md[i].key = 0; |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | /** |
| 1270 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields |
| 1271 | * @scmd: Scsi_Cmnd with the scatterlist |
| 1272 | * @evt: ibmvfc event struct |
| 1273 | * @vfc_cmd: vfc_cmd that contains the memory descriptor |
| 1274 | * @dev: device for which to map dma memory |
| 1275 | * |
| 1276 | * Returns: |
| 1277 | * 0 on success / non-zero on failure |
| 1278 | **/ |
| 1279 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, |
| 1280 | struct ibmvfc_event *evt, |
| 1281 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) |
| 1282 | { |
| 1283 | |
| 1284 | int sg_mapped; |
| 1285 | struct srp_direct_buf *data = &vfc_cmd->ioba; |
| 1286 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); |
| 1287 | |
| 1288 | sg_mapped = scsi_dma_map(scmd); |
| 1289 | if (!sg_mapped) { |
| 1290 | vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; |
| 1291 | return 0; |
| 1292 | } else if (unlikely(sg_mapped < 0)) { |
| 1293 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1294 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); |
| 1295 | return sg_mapped; |
| 1296 | } |
| 1297 | |
| 1298 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
| 1299 | vfc_cmd->flags |= IBMVFC_WRITE; |
| 1300 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; |
| 1301 | } else { |
| 1302 | vfc_cmd->flags |= IBMVFC_READ; |
| 1303 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; |
| 1304 | } |
| 1305 | |
| 1306 | if (sg_mapped == 1) { |
| 1307 | ibmvfc_map_sg_list(scmd, sg_mapped, data); |
| 1308 | return 0; |
| 1309 | } |
| 1310 | |
| 1311 | vfc_cmd->flags |= IBMVFC_SCATTERLIST; |
| 1312 | |
| 1313 | if (!evt->ext_list) { |
| 1314 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, |
| 1315 | &evt->ext_list_token); |
| 1316 | |
| 1317 | if (!evt->ext_list) { |
| 1318 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); |
| 1319 | return -ENOMEM; |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); |
| 1324 | |
| 1325 | data->va = evt->ext_list_token; |
| 1326 | data->len = sg_mapped * sizeof(struct srp_direct_buf); |
| 1327 | data->key = 0; |
| 1328 | return 0; |
| 1329 | } |
| 1330 | |
| 1331 | /** |
| 1332 | * ibmvfc_timeout - Internal command timeout handler |
| 1333 | * @evt: struct ibmvfc_event that timed out |
| 1334 | * |
| 1335 | * Called when an internally generated command times out |
| 1336 | **/ |
| 1337 | static void ibmvfc_timeout(struct ibmvfc_event *evt) |
| 1338 | { |
| 1339 | struct ibmvfc_host *vhost = evt->vhost; |
| 1340 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); |
| 1341 | ibmvfc_reset_host(vhost); |
| 1342 | } |
| 1343 | |
| 1344 | /** |
| 1345 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() |
| 1346 | * @evt: event to be sent |
| 1347 | * @vhost: ibmvfc host struct |
| 1348 | * @timeout: timeout in seconds - 0 means do not time command |
| 1349 | * |
| 1350 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) |
| 1351 | **/ |
| 1352 | static int ibmvfc_send_event(struct ibmvfc_event *evt, |
| 1353 | struct ibmvfc_host *vhost, unsigned long timeout) |
| 1354 | { |
| 1355 | u64 *crq_as_u64 = (u64 *) &evt->crq; |
| 1356 | int rc; |
| 1357 | |
| 1358 | /* Copy the IU into the transfer area */ |
| 1359 | *evt->xfer_iu = evt->iu; |
| 1360 | if (evt->crq.format == IBMVFC_CMD_FORMAT) |
| 1361 | evt->xfer_iu->cmd.tag = (u64)evt; |
| 1362 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
| 1363 | evt->xfer_iu->mad_common.tag = (u64)evt; |
| 1364 | else |
| 1365 | BUG(); |
| 1366 | |
| 1367 | list_add_tail(&evt->queue, &vhost->sent); |
| 1368 | init_timer(&evt->timer); |
| 1369 | |
| 1370 | if (timeout) { |
| 1371 | evt->timer.data = (unsigned long) evt; |
| 1372 | evt->timer.expires = jiffies + (timeout * HZ); |
| 1373 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; |
| 1374 | add_timer(&evt->timer); |
| 1375 | } |
| 1376 | |
| 1377 | if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { |
| 1378 | list_del(&evt->queue); |
| 1379 | del_timer(&evt->timer); |
| 1380 | |
| 1381 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. |
| 1382 | * Firmware will send a CRQ with a transport event (0xFF) to |
| 1383 | * tell this client what has happened to the transport. This |
| 1384 | * will be handled in ibmvfc_handle_crq() |
| 1385 | */ |
| 1386 | if (rc == H_CLOSED) { |
| 1387 | if (printk_ratelimit()) |
| 1388 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); |
| 1389 | if (evt->cmnd) |
| 1390 | scsi_dma_unmap(evt->cmnd); |
| 1391 | ibmvfc_free_event(evt); |
| 1392 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1393 | } |
| 1394 | |
| 1395 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); |
| 1396 | if (evt->cmnd) { |
| 1397 | evt->cmnd->result = DID_ERROR << 16; |
| 1398 | evt->done = ibmvfc_scsi_eh_done; |
| 1399 | } else |
| 1400 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; |
| 1401 | |
| 1402 | evt->done(evt); |
| 1403 | } else |
| 1404 | ibmvfc_trc_start(evt); |
| 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | |
| 1409 | /** |
| 1410 | * ibmvfc_log_error - Log an error for the failed command if appropriate |
| 1411 | * @evt: ibmvfc event to log |
| 1412 | * |
| 1413 | **/ |
| 1414 | static void ibmvfc_log_error(struct ibmvfc_event *evt) |
| 1415 | { |
| 1416 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 1417 | struct ibmvfc_host *vhost = evt->vhost; |
| 1418 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 1419 | struct scsi_cmnd *cmnd = evt->cmnd; |
| 1420 | const char *err = unknown_error; |
| 1421 | int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| 1422 | int logerr = 0; |
| 1423 | int rsp_code = 0; |
| 1424 | |
| 1425 | if (index >= 0) { |
| 1426 | logerr = cmd_status[index].log; |
| 1427 | err = cmd_status[index].name; |
| 1428 | } |
| 1429 | |
Brian King | 0ae808e | 2008-07-22 08:31:39 -0500 | [diff] [blame] | 1430 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1431 | return; |
| 1432 | |
| 1433 | if (rsp->flags & FCP_RSP_LEN_VALID) |
| 1434 | rsp_code = rsp->data.info.rsp_code; |
| 1435 | |
| 1436 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " |
| 1437 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", |
| 1438 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, |
| 1439 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); |
| 1440 | } |
| 1441 | |
| 1442 | /** |
| 1443 | * ibmvfc_scsi_done - Handle responses from commands |
| 1444 | * @evt: ibmvfc event to be handled |
| 1445 | * |
| 1446 | * Used as a callback when sending scsi cmds. |
| 1447 | **/ |
| 1448 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) |
| 1449 | { |
| 1450 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 1451 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 1452 | struct scsi_cmnd *cmnd = evt->cmnd; |
Brian King | 2bac406 | 2008-08-15 10:59:26 -0500 | [diff] [blame] | 1453 | u32 rsp_len = 0; |
| 1454 | u32 sense_len = rsp->fcp_sense_len; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1455 | |
| 1456 | if (cmnd) { |
| 1457 | if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) |
| 1458 | scsi_set_resid(cmnd, vfc_cmd->adapter_resid); |
| 1459 | else if (rsp->flags & FCP_RESID_UNDER) |
| 1460 | scsi_set_resid(cmnd, rsp->fcp_resid); |
| 1461 | else |
| 1462 | scsi_set_resid(cmnd, 0); |
| 1463 | |
| 1464 | if (vfc_cmd->status) { |
| 1465 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); |
| 1466 | |
| 1467 | if (rsp->flags & FCP_RSP_LEN_VALID) |
| 1468 | rsp_len = rsp->fcp_rsp_len; |
| 1469 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
| 1470 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; |
Brian King | 2bac406 | 2008-08-15 10:59:26 -0500 | [diff] [blame] | 1471 | 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] | 1472 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
| 1473 | |
Brian King | 50119da | 2008-10-29 08:46:36 -0500 | [diff] [blame^] | 1474 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
| 1475 | cmnd->result = (DID_ERROR << 16); |
| 1476 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1477 | ibmvfc_log_error(evt); |
| 1478 | } |
| 1479 | |
| 1480 | if (!cmnd->result && |
| 1481 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) |
| 1482 | cmnd->result = (DID_ERROR << 16); |
| 1483 | |
| 1484 | scsi_dma_unmap(cmnd); |
| 1485 | cmnd->scsi_done(cmnd); |
| 1486 | } |
| 1487 | |
| 1488 | ibmvfc_free_event(evt); |
| 1489 | } |
| 1490 | |
| 1491 | /** |
| 1492 | * ibmvfc_host_chkready - Check if the host can accept commands |
| 1493 | * @vhost: struct ibmvfc host |
| 1494 | * |
| 1495 | * Returns: |
| 1496 | * 1 if host can accept command / 0 if not |
| 1497 | **/ |
| 1498 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) |
| 1499 | { |
| 1500 | int result = 0; |
| 1501 | |
| 1502 | switch (vhost->state) { |
| 1503 | case IBMVFC_LINK_DEAD: |
| 1504 | case IBMVFC_HOST_OFFLINE: |
| 1505 | result = DID_NO_CONNECT << 16; |
| 1506 | break; |
| 1507 | case IBMVFC_NO_CRQ: |
| 1508 | case IBMVFC_INITIALIZING: |
| 1509 | case IBMVFC_HALTED: |
| 1510 | case IBMVFC_LINK_DOWN: |
| 1511 | result = DID_REQUEUE << 16; |
| 1512 | break; |
| 1513 | case IBMVFC_ACTIVE: |
| 1514 | result = 0; |
| 1515 | break; |
| 1516 | }; |
| 1517 | |
| 1518 | return result; |
| 1519 | } |
| 1520 | |
| 1521 | /** |
| 1522 | * ibmvfc_queuecommand - The queuecommand function of the scsi template |
| 1523 | * @cmnd: struct scsi_cmnd to be executed |
| 1524 | * @done: Callback function to be called when cmnd is completed |
| 1525 | * |
| 1526 | * Returns: |
| 1527 | * 0 on success / other on failure |
| 1528 | **/ |
| 1529 | static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, |
| 1530 | void (*done) (struct scsi_cmnd *)) |
| 1531 | { |
| 1532 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); |
| 1533 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| 1534 | struct ibmvfc_cmd *vfc_cmd; |
| 1535 | struct ibmvfc_event *evt; |
| 1536 | u8 tag[2]; |
| 1537 | int rc; |
| 1538 | |
| 1539 | if (unlikely((rc = fc_remote_port_chkready(rport))) || |
| 1540 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { |
| 1541 | cmnd->result = rc; |
| 1542 | done(cmnd); |
| 1543 | return 0; |
| 1544 | } |
| 1545 | |
| 1546 | cmnd->result = (DID_OK << 16); |
| 1547 | evt = ibmvfc_get_event(vhost); |
| 1548 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); |
| 1549 | evt->cmnd = cmnd; |
| 1550 | cmnd->scsi_done = done; |
| 1551 | vfc_cmd = &evt->iu.cmd; |
| 1552 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); |
| 1553 | vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1554 | vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); |
| 1555 | vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1556 | vfc_cmd->payload_len = sizeof(vfc_cmd->iu); |
| 1557 | vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); |
| 1558 | vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; |
| 1559 | vfc_cmd->tgt_scsi_id = rport->port_id; |
| 1560 | if ((rport->supported_classes & FC_COS_CLASS3) && |
| 1561 | (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) |
| 1562 | vfc_cmd->flags = IBMVFC_CLASS_3_ERR; |
| 1563 | vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); |
| 1564 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); |
| 1565 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); |
| 1566 | |
| 1567 | if (scsi_populate_tag_msg(cmnd, tag)) { |
| 1568 | vfc_cmd->task_tag = tag[1]; |
| 1569 | switch (tag[0]) { |
| 1570 | case MSG_SIMPLE_TAG: |
| 1571 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; |
| 1572 | break; |
| 1573 | case MSG_HEAD_TAG: |
| 1574 | vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; |
| 1575 | break; |
| 1576 | case MSG_ORDERED_TAG: |
| 1577 | vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; |
| 1578 | break; |
| 1579 | }; |
| 1580 | } |
| 1581 | |
| 1582 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) |
| 1583 | return ibmvfc_send_event(evt, vhost, 0); |
| 1584 | |
| 1585 | ibmvfc_free_event(evt); |
| 1586 | if (rc == -ENOMEM) |
| 1587 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1588 | |
| 1589 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1590 | scmd_printk(KERN_ERR, cmnd, |
| 1591 | "Failed to map DMA buffer for command. rc=%d\n", rc); |
| 1592 | |
| 1593 | cmnd->result = DID_ERROR << 16; |
| 1594 | done(cmnd); |
| 1595 | return 0; |
| 1596 | } |
| 1597 | |
| 1598 | /** |
| 1599 | * ibmvfc_sync_completion - Signal that a synchronous command has completed |
| 1600 | * @evt: ibmvfc event struct |
| 1601 | * |
| 1602 | **/ |
| 1603 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) |
| 1604 | { |
| 1605 | /* copy the response back */ |
| 1606 | if (evt->sync_iu) |
| 1607 | *evt->sync_iu = *evt->xfer_iu; |
| 1608 | |
| 1609 | complete(&evt->comp); |
| 1610 | } |
| 1611 | |
| 1612 | /** |
| 1613 | * ibmvfc_reset_device - Reset the device with the specified reset type |
| 1614 | * @sdev: scsi device to reset |
| 1615 | * @type: reset type |
| 1616 | * @desc: reset type description for log messages |
| 1617 | * |
| 1618 | * Returns: |
| 1619 | * 0 on success / other on failure |
| 1620 | **/ |
| 1621 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) |
| 1622 | { |
| 1623 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1624 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1625 | struct ibmvfc_cmd *tmf; |
| 1626 | struct ibmvfc_event *evt; |
| 1627 | union ibmvfc_iu rsp_iu; |
| 1628 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| 1629 | int rsp_rc = -EBUSY; |
| 1630 | unsigned long flags; |
| 1631 | int rsp_code = 0; |
| 1632 | |
| 1633 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1634 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1635 | evt = ibmvfc_get_event(vhost); |
| 1636 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| 1637 | |
| 1638 | tmf = &evt->iu.cmd; |
| 1639 | memset(tmf, 0, sizeof(*tmf)); |
| 1640 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1641 | tmf->resp.len = sizeof(tmf->rsp); |
| 1642 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1643 | tmf->payload_len = sizeof(tmf->iu); |
| 1644 | tmf->resp_len = sizeof(tmf->rsp); |
| 1645 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1646 | tmf->tgt_scsi_id = rport->port_id; |
| 1647 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| 1648 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| 1649 | tmf->iu.tmf_flags = type; |
| 1650 | evt->sync_iu = &rsp_iu; |
| 1651 | |
| 1652 | init_completion(&evt->comp); |
| 1653 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1654 | } |
| 1655 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1656 | |
| 1657 | if (rsp_rc != 0) { |
| 1658 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", |
| 1659 | desc, rsp_rc); |
| 1660 | return -EIO; |
| 1661 | } |
| 1662 | |
| 1663 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); |
| 1664 | wait_for_completion(&evt->comp); |
| 1665 | |
| 1666 | if (rsp_iu.cmd.status) { |
| 1667 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| 1668 | rsp_code = fc_rsp->data.info.rsp_code; |
| 1669 | |
| 1670 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " |
| 1671 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| 1672 | desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| 1673 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| 1674 | fc_rsp->scsi_status); |
| 1675 | rsp_rc = -EIO; |
| 1676 | } else |
| 1677 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); |
| 1678 | |
| 1679 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1680 | ibmvfc_free_event(evt); |
| 1681 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1682 | return rsp_rc; |
| 1683 | } |
| 1684 | |
| 1685 | /** |
| 1686 | * ibmvfc_abort_task_set - Abort outstanding commands to the device |
| 1687 | * @sdev: scsi device to abort commands |
| 1688 | * |
| 1689 | * This sends an Abort Task Set to the VIOS for the specified device. This does |
| 1690 | * NOT send any cancel to the VIOS. That must be done separately. |
| 1691 | * |
| 1692 | * Returns: |
| 1693 | * 0 on success / other on failure |
| 1694 | **/ |
| 1695 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
| 1696 | { |
| 1697 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1698 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1699 | struct ibmvfc_cmd *tmf; |
| 1700 | struct ibmvfc_event *evt, *found_evt; |
| 1701 | union ibmvfc_iu rsp_iu; |
| 1702 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| 1703 | int rsp_rc = -EBUSY; |
| 1704 | unsigned long flags; |
| 1705 | int rsp_code = 0; |
| 1706 | |
| 1707 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1708 | found_evt = NULL; |
| 1709 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1710 | if (evt->cmnd && evt->cmnd->device == sdev) { |
| 1711 | found_evt = evt; |
| 1712 | break; |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | if (!found_evt) { |
| 1717 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1718 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); |
| 1719 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1720 | return 0; |
| 1721 | } |
| 1722 | |
| 1723 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1724 | evt = ibmvfc_get_event(vhost); |
| 1725 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| 1726 | |
| 1727 | tmf = &evt->iu.cmd; |
| 1728 | memset(tmf, 0, sizeof(*tmf)); |
| 1729 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1730 | tmf->resp.len = sizeof(tmf->rsp); |
| 1731 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1732 | tmf->payload_len = sizeof(tmf->iu); |
| 1733 | tmf->resp_len = sizeof(tmf->rsp); |
| 1734 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1735 | tmf->tgt_scsi_id = rport->port_id; |
| 1736 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| 1737 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| 1738 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; |
| 1739 | evt->sync_iu = &rsp_iu; |
| 1740 | |
| 1741 | init_completion(&evt->comp); |
| 1742 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1743 | } |
| 1744 | |
| 1745 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1746 | |
| 1747 | if (rsp_rc != 0) { |
| 1748 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); |
| 1749 | return -EIO; |
| 1750 | } |
| 1751 | |
| 1752 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); |
| 1753 | wait_for_completion(&evt->comp); |
| 1754 | |
| 1755 | if (rsp_iu.cmd.status) { |
| 1756 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| 1757 | rsp_code = fc_rsp->data.info.rsp_code; |
| 1758 | |
| 1759 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " |
| 1760 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| 1761 | ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| 1762 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| 1763 | fc_rsp->scsi_status); |
| 1764 | rsp_rc = -EIO; |
| 1765 | } else |
| 1766 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); |
| 1767 | |
| 1768 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1769 | ibmvfc_free_event(evt); |
| 1770 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1771 | return rsp_rc; |
| 1772 | } |
| 1773 | |
| 1774 | /** |
| 1775 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device |
| 1776 | * @sdev: scsi device to cancel commands |
| 1777 | * @type: type of error recovery being performed |
| 1778 | * |
| 1779 | * This sends a cancel to the VIOS for the specified device. This does |
| 1780 | * NOT send any abort to the actual device. That must be done separately. |
| 1781 | * |
| 1782 | * Returns: |
| 1783 | * 0 on success / other on failure |
| 1784 | **/ |
| 1785 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) |
| 1786 | { |
| 1787 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1788 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1789 | struct ibmvfc_tmf *tmf; |
| 1790 | struct ibmvfc_event *evt, *found_evt; |
| 1791 | union ibmvfc_iu rsp; |
| 1792 | int rsp_rc = -EBUSY; |
| 1793 | unsigned long flags; |
| 1794 | u16 status; |
| 1795 | |
| 1796 | ENTER; |
| 1797 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1798 | found_evt = NULL; |
| 1799 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1800 | if (evt->cmnd && evt->cmnd->device == sdev) { |
| 1801 | found_evt = evt; |
| 1802 | break; |
| 1803 | } |
| 1804 | } |
| 1805 | |
| 1806 | if (!found_evt) { |
| 1807 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1808 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); |
| 1809 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1810 | return 0; |
| 1811 | } |
| 1812 | |
| 1813 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1814 | evt = ibmvfc_get_event(vhost); |
| 1815 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| 1816 | |
| 1817 | tmf = &evt->iu.tmf; |
| 1818 | memset(tmf, 0, sizeof(*tmf)); |
| 1819 | tmf->common.version = 1; |
| 1820 | tmf->common.opcode = IBMVFC_TMF_MAD; |
| 1821 | tmf->common.length = sizeof(*tmf); |
| 1822 | tmf->scsi_id = rport->port_id; |
| 1823 | int_to_scsilun(sdev->lun, &tmf->lun); |
| 1824 | tmf->flags = (type | IBMVFC_TMF_LUA_VALID); |
| 1825 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1826 | tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata); |
| 1827 | |
| 1828 | evt->sync_iu = &rsp; |
| 1829 | init_completion(&evt->comp); |
| 1830 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1831 | } |
| 1832 | |
| 1833 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1834 | |
| 1835 | if (rsp_rc != 0) { |
| 1836 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); |
| 1837 | return -EIO; |
| 1838 | } |
| 1839 | |
| 1840 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); |
| 1841 | |
| 1842 | wait_for_completion(&evt->comp); |
| 1843 | status = rsp.mad_common.status; |
| 1844 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1845 | ibmvfc_free_event(evt); |
| 1846 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1847 | |
| 1848 | if (status != IBMVFC_MAD_SUCCESS) { |
| 1849 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); |
| 1850 | return -EIO; |
| 1851 | } |
| 1852 | |
| 1853 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); |
| 1854 | return 0; |
| 1855 | } |
| 1856 | |
| 1857 | /** |
| 1858 | * ibmvfc_eh_abort_handler - Abort a command |
| 1859 | * @cmd: scsi command to abort |
| 1860 | * |
| 1861 | * Returns: |
| 1862 | * SUCCESS / FAILED |
| 1863 | **/ |
| 1864 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) |
| 1865 | { |
| 1866 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1867 | struct ibmvfc_event *evt, *pos; |
| 1868 | int cancel_rc, abort_rc; |
| 1869 | unsigned long flags; |
| 1870 | |
| 1871 | ENTER; |
| 1872 | ibmvfc_wait_while_resetting(vhost); |
| 1873 | cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET); |
| 1874 | abort_rc = ibmvfc_abort_task_set(cmd->device); |
| 1875 | |
| 1876 | if (!cancel_rc && !abort_rc) { |
| 1877 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1878 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 1879 | if (evt->cmnd && evt->cmnd->device == cmd->device) |
| 1880 | ibmvfc_fail_request(evt, DID_ABORT); |
| 1881 | } |
| 1882 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1883 | LEAVE; |
| 1884 | return SUCCESS; |
| 1885 | } |
| 1886 | |
| 1887 | LEAVE; |
| 1888 | return FAILED; |
| 1889 | } |
| 1890 | |
| 1891 | /** |
| 1892 | * ibmvfc_eh_device_reset_handler - Reset a single LUN |
| 1893 | * @cmd: scsi command struct |
| 1894 | * |
| 1895 | * Returns: |
| 1896 | * SUCCESS / FAILED |
| 1897 | **/ |
| 1898 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) |
| 1899 | { |
| 1900 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1901 | struct ibmvfc_event *evt, *pos; |
| 1902 | int cancel_rc, reset_rc; |
| 1903 | unsigned long flags; |
| 1904 | |
| 1905 | ENTER; |
| 1906 | ibmvfc_wait_while_resetting(vhost); |
| 1907 | cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET); |
| 1908 | reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN"); |
| 1909 | |
| 1910 | if (!cancel_rc && !reset_rc) { |
| 1911 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1912 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 1913 | if (evt->cmnd && evt->cmnd->device == cmd->device) |
| 1914 | ibmvfc_fail_request(evt, DID_ABORT); |
| 1915 | } |
| 1916 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1917 | LEAVE; |
| 1918 | return SUCCESS; |
| 1919 | } |
| 1920 | |
| 1921 | LEAVE; |
| 1922 | return FAILED; |
| 1923 | } |
| 1924 | |
| 1925 | /** |
| 1926 | * ibmvfc_dev_cancel_all - Device iterated cancel all function |
| 1927 | * @sdev: scsi device struct |
| 1928 | * @data: return code |
| 1929 | * |
| 1930 | **/ |
| 1931 | static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) |
| 1932 | { |
| 1933 | unsigned long *rc = data; |
| 1934 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); |
| 1935 | } |
| 1936 | |
| 1937 | /** |
| 1938 | * ibmvfc_dev_abort_all - Device iterated abort task set function |
| 1939 | * @sdev: scsi device struct |
| 1940 | * @data: return code |
| 1941 | * |
| 1942 | **/ |
| 1943 | static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) |
| 1944 | { |
| 1945 | unsigned long *rc = data; |
| 1946 | *rc |= ibmvfc_abort_task_set(sdev); |
| 1947 | } |
| 1948 | |
| 1949 | /** |
| 1950 | * ibmvfc_eh_target_reset_handler - Reset the target |
| 1951 | * @cmd: scsi command struct |
| 1952 | * |
| 1953 | * Returns: |
| 1954 | * SUCCESS / FAILED |
| 1955 | **/ |
| 1956 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) |
| 1957 | { |
| 1958 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1959 | struct scsi_target *starget = scsi_target(cmd->device); |
| 1960 | struct ibmvfc_event *evt, *pos; |
| 1961 | int reset_rc; |
| 1962 | unsigned long cancel_rc = 0; |
| 1963 | unsigned long flags; |
| 1964 | |
| 1965 | ENTER; |
| 1966 | ibmvfc_wait_while_resetting(vhost); |
| 1967 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| 1968 | reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target"); |
| 1969 | |
| 1970 | if (!cancel_rc && !reset_rc) { |
| 1971 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1972 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 1973 | if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) |
| 1974 | ibmvfc_fail_request(evt, DID_ABORT); |
| 1975 | } |
| 1976 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1977 | LEAVE; |
| 1978 | return SUCCESS; |
| 1979 | } |
| 1980 | |
| 1981 | LEAVE; |
| 1982 | return FAILED; |
| 1983 | } |
| 1984 | |
| 1985 | /** |
| 1986 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server |
| 1987 | * @cmd: struct scsi_cmnd having problems |
| 1988 | * |
| 1989 | **/ |
| 1990 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) |
| 1991 | { |
| 1992 | int rc; |
| 1993 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 1994 | |
| 1995 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); |
| 1996 | rc = ibmvfc_issue_fc_host_lip(vhost->host); |
| 1997 | return rc ? FAILED : SUCCESS; |
| 1998 | } |
| 1999 | |
| 2000 | /** |
| 2001 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. |
| 2002 | * @rport: rport struct |
| 2003 | * |
| 2004 | * Return value: |
| 2005 | * none |
| 2006 | **/ |
| 2007 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) |
| 2008 | { |
| 2009 | struct scsi_target *starget = to_scsi_target(&rport->dev); |
| 2010 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2011 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2012 | struct ibmvfc_event *evt, *pos; |
| 2013 | unsigned long cancel_rc = 0; |
| 2014 | unsigned long abort_rc = 0; |
| 2015 | unsigned long flags; |
| 2016 | |
| 2017 | ENTER; |
| 2018 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| 2019 | starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); |
| 2020 | |
| 2021 | if (!cancel_rc && !abort_rc) { |
| 2022 | spin_lock_irqsave(shost->host_lock, flags); |
| 2023 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| 2024 | if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) |
| 2025 | ibmvfc_fail_request(evt, DID_ABORT); |
| 2026 | } |
| 2027 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2028 | } else |
| 2029 | ibmvfc_issue_fc_host_lip(shost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2030 | LEAVE; |
| 2031 | } |
| 2032 | |
| 2033 | static const struct { |
| 2034 | enum ibmvfc_async_event ae; |
| 2035 | const char *desc; |
| 2036 | } ae_desc [] = { |
| 2037 | { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, |
| 2038 | { IBMVFC_AE_ELS_LOGO, "LOGO" }, |
| 2039 | { IBMVFC_AE_ELS_PRLO, "PRLO" }, |
| 2040 | { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, |
| 2041 | { IBMVFC_AE_SCN_GROUP, "Group SCN" }, |
| 2042 | { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, |
| 2043 | { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, |
| 2044 | { IBMVFC_AE_LINK_UP, "Link Up" }, |
| 2045 | { IBMVFC_AE_LINK_DOWN, "Link Down" }, |
| 2046 | { IBMVFC_AE_LINK_DEAD, "Link Dead" }, |
| 2047 | { IBMVFC_AE_HALT, "Halt" }, |
| 2048 | { IBMVFC_AE_RESUME, "Resume" }, |
| 2049 | { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, |
| 2050 | }; |
| 2051 | |
| 2052 | static const char *unknown_ae = "Unknown async"; |
| 2053 | |
| 2054 | /** |
| 2055 | * ibmvfc_get_ae_desc - Get text description for async event |
| 2056 | * @ae: async event |
| 2057 | * |
| 2058 | **/ |
| 2059 | static const char *ibmvfc_get_ae_desc(u64 ae) |
| 2060 | { |
| 2061 | int i; |
| 2062 | |
| 2063 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) |
| 2064 | if (ae_desc[i].ae == ae) |
| 2065 | return ae_desc[i].desc; |
| 2066 | |
| 2067 | return unknown_ae; |
| 2068 | } |
| 2069 | |
| 2070 | /** |
| 2071 | * ibmvfc_handle_async - Handle an async event from the adapter |
| 2072 | * @crq: crq to process |
| 2073 | * @vhost: ibmvfc host struct |
| 2074 | * |
| 2075 | **/ |
| 2076 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, |
| 2077 | struct ibmvfc_host *vhost) |
| 2078 | { |
| 2079 | const char *desc = ibmvfc_get_ae_desc(crq->event); |
| 2080 | |
Brian King | 3e33994 | 2008-08-15 10:59:27 -0500 | [diff] [blame] | 2081 | ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx," |
| 2082 | " 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] | 2083 | |
| 2084 | switch (crq->event) { |
| 2085 | case IBMVFC_AE_LINK_UP: |
| 2086 | case IBMVFC_AE_RESUME: |
| 2087 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2088 | ibmvfc_init_host(vhost, 1); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2089 | break; |
| 2090 | case IBMVFC_AE_SCN_FABRIC: |
| 2091 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2092 | ibmvfc_init_host(vhost, 1); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2093 | break; |
| 2094 | case IBMVFC_AE_SCN_NPORT: |
| 2095 | case IBMVFC_AE_SCN_GROUP: |
| 2096 | case IBMVFC_AE_SCN_DOMAIN: |
| 2097 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
| 2098 | case IBMVFC_AE_ELS_LOGO: |
| 2099 | case IBMVFC_AE_ELS_PRLO: |
| 2100 | case IBMVFC_AE_ELS_PLOGI: |
| 2101 | ibmvfc_reinit_host(vhost); |
| 2102 | break; |
| 2103 | case IBMVFC_AE_LINK_DOWN: |
| 2104 | case IBMVFC_AE_ADAPTER_FAILED: |
| 2105 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2106 | break; |
| 2107 | case IBMVFC_AE_LINK_DEAD: |
| 2108 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2109 | break; |
| 2110 | case IBMVFC_AE_HALT: |
| 2111 | ibmvfc_link_down(vhost, IBMVFC_HALTED); |
| 2112 | break; |
| 2113 | default: |
| 2114 | dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); |
| 2115 | break; |
| 2116 | }; |
| 2117 | } |
| 2118 | |
| 2119 | /** |
| 2120 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ |
| 2121 | * @crq: Command/Response queue |
| 2122 | * @vhost: ibmvfc host struct |
| 2123 | * |
| 2124 | **/ |
| 2125 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) |
| 2126 | { |
| 2127 | long rc; |
| 2128 | struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; |
| 2129 | |
| 2130 | switch (crq->valid) { |
| 2131 | case IBMVFC_CRQ_INIT_RSP: |
| 2132 | switch (crq->format) { |
| 2133 | case IBMVFC_CRQ_INIT: |
| 2134 | dev_info(vhost->dev, "Partner initialized\n"); |
| 2135 | /* Send back a response */ |
| 2136 | rc = ibmvfc_send_crq_init_complete(vhost); |
| 2137 | if (rc == 0) |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2138 | ibmvfc_init_host(vhost, 0); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2139 | else |
| 2140 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); |
| 2141 | break; |
| 2142 | case IBMVFC_CRQ_INIT_COMPLETE: |
| 2143 | dev_info(vhost->dev, "Partner initialization complete\n"); |
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 | break; |
| 2146 | default: |
| 2147 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); |
| 2148 | } |
| 2149 | return; |
| 2150 | case IBMVFC_CRQ_XPORT_EVENT: |
| 2151 | vhost->state = IBMVFC_NO_CRQ; |
| 2152 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 2153 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { |
| 2154 | /* We need to re-setup the interpartition connection */ |
| 2155 | dev_info(vhost->dev, "Re-enabling adapter\n"); |
| 2156 | vhost->client_migrated = 1; |
| 2157 | ibmvfc_purge_requests(vhost, DID_REQUEUE); |
| 2158 | if ((rc = ibmvfc_reenable_crq_queue(vhost)) || |
| 2159 | (rc = ibmvfc_send_crq_init(vhost))) { |
| 2160 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2161 | dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); |
| 2162 | } else |
| 2163 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2164 | } else { |
| 2165 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); |
| 2166 | |
| 2167 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 2168 | if ((rc = ibmvfc_reset_crq(vhost)) || |
| 2169 | (rc = ibmvfc_send_crq_init(vhost))) { |
| 2170 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2171 | dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); |
| 2172 | } else |
| 2173 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2174 | } |
| 2175 | return; |
| 2176 | case IBMVFC_CRQ_CMD_RSP: |
| 2177 | break; |
| 2178 | default: |
| 2179 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); |
| 2180 | return; |
| 2181 | } |
| 2182 | |
| 2183 | if (crq->format == IBMVFC_ASYNC_EVENT) |
| 2184 | return; |
| 2185 | |
| 2186 | /* The only kind of payload CRQs we should get are responses to |
| 2187 | * things we send. Make sure this response is to something we |
| 2188 | * actually sent |
| 2189 | */ |
| 2190 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { |
| 2191 | dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", |
| 2192 | crq->ioba); |
| 2193 | return; |
| 2194 | } |
| 2195 | |
| 2196 | if (unlikely(atomic_read(&evt->free))) { |
| 2197 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", |
| 2198 | crq->ioba); |
| 2199 | return; |
| 2200 | } |
| 2201 | |
| 2202 | del_timer(&evt->timer); |
| 2203 | list_del(&evt->queue); |
| 2204 | ibmvfc_trc_end(evt); |
| 2205 | evt->done(evt); |
| 2206 | } |
| 2207 | |
| 2208 | /** |
| 2209 | * ibmvfc_scan_finished - Check if the device scan is done. |
| 2210 | * @shost: scsi host struct |
| 2211 | * @time: current elapsed time |
| 2212 | * |
| 2213 | * Returns: |
| 2214 | * 0 if scan is not done / 1 if scan is done |
| 2215 | **/ |
| 2216 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| 2217 | { |
| 2218 | unsigned long flags; |
| 2219 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2220 | int done = 0; |
| 2221 | |
| 2222 | spin_lock_irqsave(shost->host_lock, flags); |
| 2223 | if (time >= (init_timeout * HZ)) { |
| 2224 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " |
| 2225 | "continuing initialization\n", init_timeout); |
| 2226 | done = 1; |
| 2227 | } |
| 2228 | |
| 2229 | if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) |
| 2230 | done = 1; |
| 2231 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2232 | return done; |
| 2233 | } |
| 2234 | |
| 2235 | /** |
| 2236 | * ibmvfc_slave_alloc - Setup the device's task set value |
| 2237 | * @sdev: struct scsi_device device to configure |
| 2238 | * |
| 2239 | * Set the device's task set value so that error handling works as |
| 2240 | * expected. |
| 2241 | * |
| 2242 | * Returns: |
| 2243 | * 0 on success / -ENXIO if device does not exist |
| 2244 | **/ |
| 2245 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) |
| 2246 | { |
| 2247 | struct Scsi_Host *shost = sdev->host; |
| 2248 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 2249 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2250 | unsigned long flags = 0; |
| 2251 | |
| 2252 | if (!rport || fc_remote_port_chkready(rport)) |
| 2253 | return -ENXIO; |
| 2254 | |
| 2255 | spin_lock_irqsave(shost->host_lock, flags); |
| 2256 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; |
| 2257 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2258 | return 0; |
| 2259 | } |
| 2260 | |
| 2261 | /** |
| 2262 | * ibmvfc_slave_configure - Configure the device |
| 2263 | * @sdev: struct scsi_device device to configure |
| 2264 | * |
| 2265 | * Enable allow_restart for a device if it is a disk. Adjust the |
| 2266 | * queue_depth here also. |
| 2267 | * |
| 2268 | * Returns: |
| 2269 | * 0 |
| 2270 | **/ |
| 2271 | static int ibmvfc_slave_configure(struct scsi_device *sdev) |
| 2272 | { |
| 2273 | struct Scsi_Host *shost = sdev->host; |
| 2274 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); |
| 2275 | unsigned long flags = 0; |
| 2276 | |
| 2277 | spin_lock_irqsave(shost->host_lock, flags); |
| 2278 | if (sdev->type == TYPE_DISK) |
| 2279 | sdev->allow_restart = 1; |
| 2280 | |
| 2281 | if (sdev->tagged_supported) { |
| 2282 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
| 2283 | scsi_activate_tcq(sdev, sdev->queue_depth); |
| 2284 | } else |
| 2285 | scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| 2286 | |
| 2287 | rport->dev_loss_tmo = dev_loss_tmo; |
| 2288 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2289 | return 0; |
| 2290 | } |
| 2291 | |
| 2292 | /** |
| 2293 | * ibmvfc_change_queue_depth - Change the device's queue depth |
| 2294 | * @sdev: scsi device struct |
| 2295 | * @qdepth: depth to set |
| 2296 | * |
| 2297 | * Return value: |
| 2298 | * actual depth set |
| 2299 | **/ |
| 2300 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
| 2301 | { |
| 2302 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) |
| 2303 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; |
| 2304 | |
| 2305 | scsi_adjust_queue_depth(sdev, 0, qdepth); |
| 2306 | return sdev->queue_depth; |
| 2307 | } |
| 2308 | |
| 2309 | /** |
| 2310 | * ibmvfc_change_queue_type - Change the device's queue type |
| 2311 | * @sdev: scsi device struct |
| 2312 | * @tag_type: type of tags to use |
| 2313 | * |
| 2314 | * Return value: |
| 2315 | * actual queue type set |
| 2316 | **/ |
| 2317 | static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) |
| 2318 | { |
| 2319 | if (sdev->tagged_supported) { |
| 2320 | scsi_set_tag_type(sdev, tag_type); |
| 2321 | |
| 2322 | if (tag_type) |
| 2323 | scsi_activate_tcq(sdev, sdev->queue_depth); |
| 2324 | else |
| 2325 | scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| 2326 | } else |
| 2327 | tag_type = 0; |
| 2328 | |
| 2329 | return tag_type; |
| 2330 | } |
| 2331 | |
| 2332 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
| 2333 | struct device_attribute *attr, char *buf) |
| 2334 | { |
| 2335 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2336 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2337 | |
| 2338 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2339 | vhost->login_buf->resp.partition_name); |
| 2340 | } |
| 2341 | |
| 2342 | static struct device_attribute ibmvfc_host_partition_name = { |
| 2343 | .attr = { |
| 2344 | .name = "partition_name", |
| 2345 | .mode = S_IRUGO, |
| 2346 | }, |
| 2347 | .show = ibmvfc_show_host_partition_name, |
| 2348 | }; |
| 2349 | |
| 2350 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
| 2351 | struct device_attribute *attr, char *buf) |
| 2352 | { |
| 2353 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2354 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2355 | |
| 2356 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2357 | vhost->login_buf->resp.device_name); |
| 2358 | } |
| 2359 | |
| 2360 | static struct device_attribute ibmvfc_host_device_name = { |
| 2361 | .attr = { |
| 2362 | .name = "device_name", |
| 2363 | .mode = S_IRUGO, |
| 2364 | }, |
| 2365 | .show = ibmvfc_show_host_device_name, |
| 2366 | }; |
| 2367 | |
| 2368 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
| 2369 | struct device_attribute *attr, char *buf) |
| 2370 | { |
| 2371 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2372 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2373 | |
| 2374 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2375 | vhost->login_buf->resp.port_loc_code); |
| 2376 | } |
| 2377 | |
| 2378 | static struct device_attribute ibmvfc_host_loc_code = { |
| 2379 | .attr = { |
| 2380 | .name = "port_loc_code", |
| 2381 | .mode = S_IRUGO, |
| 2382 | }, |
| 2383 | .show = ibmvfc_show_host_loc_code, |
| 2384 | }; |
| 2385 | |
| 2386 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
| 2387 | struct device_attribute *attr, char *buf) |
| 2388 | { |
| 2389 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2390 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2391 | |
| 2392 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2393 | vhost->login_buf->resp.drc_name); |
| 2394 | } |
| 2395 | |
| 2396 | static struct device_attribute ibmvfc_host_drc_name = { |
| 2397 | .attr = { |
| 2398 | .name = "drc_name", |
| 2399 | .mode = S_IRUGO, |
| 2400 | }, |
| 2401 | .show = ibmvfc_show_host_drc_name, |
| 2402 | }; |
| 2403 | |
| 2404 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
| 2405 | struct device_attribute *attr, char *buf) |
| 2406 | { |
| 2407 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2408 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2409 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); |
| 2410 | } |
| 2411 | |
| 2412 | static struct device_attribute ibmvfc_host_npiv_version = { |
| 2413 | .attr = { |
| 2414 | .name = "npiv_version", |
| 2415 | .mode = S_IRUGO, |
| 2416 | }, |
| 2417 | .show = ibmvfc_show_host_npiv_version, |
| 2418 | }; |
| 2419 | |
| 2420 | /** |
| 2421 | * ibmvfc_show_log_level - Show the adapter's error logging level |
| 2422 | * @dev: class device struct |
| 2423 | * @buf: buffer |
| 2424 | * |
| 2425 | * Return value: |
| 2426 | * number of bytes printed to buffer |
| 2427 | **/ |
| 2428 | static ssize_t ibmvfc_show_log_level(struct device *dev, |
| 2429 | struct device_attribute *attr, char *buf) |
| 2430 | { |
| 2431 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2432 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2433 | unsigned long flags = 0; |
| 2434 | int len; |
| 2435 | |
| 2436 | spin_lock_irqsave(shost->host_lock, flags); |
| 2437 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); |
| 2438 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2439 | return len; |
| 2440 | } |
| 2441 | |
| 2442 | /** |
| 2443 | * ibmvfc_store_log_level - Change the adapter's error logging level |
| 2444 | * @dev: class device struct |
| 2445 | * @buf: buffer |
| 2446 | * |
| 2447 | * Return value: |
| 2448 | * number of bytes printed to buffer |
| 2449 | **/ |
| 2450 | static ssize_t ibmvfc_store_log_level(struct device *dev, |
| 2451 | struct device_attribute *attr, |
| 2452 | const char *buf, size_t count) |
| 2453 | { |
| 2454 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2455 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2456 | unsigned long flags = 0; |
| 2457 | |
| 2458 | spin_lock_irqsave(shost->host_lock, flags); |
| 2459 | vhost->log_level = simple_strtoul(buf, NULL, 10); |
| 2460 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2461 | return strlen(buf); |
| 2462 | } |
| 2463 | |
| 2464 | static struct device_attribute ibmvfc_log_level_attr = { |
| 2465 | .attr = { |
| 2466 | .name = "log_level", |
| 2467 | .mode = S_IRUGO | S_IWUSR, |
| 2468 | }, |
| 2469 | .show = ibmvfc_show_log_level, |
| 2470 | .store = ibmvfc_store_log_level |
| 2471 | }; |
| 2472 | |
| 2473 | #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| 2474 | /** |
| 2475 | * ibmvfc_read_trace - Dump the adapter trace |
| 2476 | * @kobj: kobject struct |
| 2477 | * @bin_attr: bin_attribute struct |
| 2478 | * @buf: buffer |
| 2479 | * @off: offset |
| 2480 | * @count: buffer size |
| 2481 | * |
| 2482 | * Return value: |
| 2483 | * number of bytes printed to buffer |
| 2484 | **/ |
| 2485 | static ssize_t ibmvfc_read_trace(struct kobject *kobj, |
| 2486 | struct bin_attribute *bin_attr, |
| 2487 | char *buf, loff_t off, size_t count) |
| 2488 | { |
| 2489 | struct device *dev = container_of(kobj, struct device, kobj); |
| 2490 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2491 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2492 | unsigned long flags = 0; |
| 2493 | int size = IBMVFC_TRACE_SIZE; |
| 2494 | char *src = (char *)vhost->trace; |
| 2495 | |
| 2496 | if (off > size) |
| 2497 | return 0; |
| 2498 | if (off + count > size) { |
| 2499 | size -= off; |
| 2500 | count = size; |
| 2501 | } |
| 2502 | |
| 2503 | spin_lock_irqsave(shost->host_lock, flags); |
| 2504 | memcpy(buf, &src[off], count); |
| 2505 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2506 | return count; |
| 2507 | } |
| 2508 | |
| 2509 | static struct bin_attribute ibmvfc_trace_attr = { |
| 2510 | .attr = { |
| 2511 | .name = "trace", |
| 2512 | .mode = S_IRUGO, |
| 2513 | }, |
| 2514 | .size = 0, |
| 2515 | .read = ibmvfc_read_trace, |
| 2516 | }; |
| 2517 | #endif |
| 2518 | |
| 2519 | static struct device_attribute *ibmvfc_attrs[] = { |
| 2520 | &ibmvfc_host_partition_name, |
| 2521 | &ibmvfc_host_device_name, |
| 2522 | &ibmvfc_host_loc_code, |
| 2523 | &ibmvfc_host_drc_name, |
| 2524 | &ibmvfc_host_npiv_version, |
| 2525 | &ibmvfc_log_level_attr, |
| 2526 | NULL |
| 2527 | }; |
| 2528 | |
| 2529 | static struct scsi_host_template driver_template = { |
| 2530 | .module = THIS_MODULE, |
| 2531 | .name = "IBM POWER Virtual FC Adapter", |
| 2532 | .proc_name = IBMVFC_NAME, |
| 2533 | .queuecommand = ibmvfc_queuecommand, |
| 2534 | .eh_abort_handler = ibmvfc_eh_abort_handler, |
| 2535 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, |
| 2536 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, |
| 2537 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, |
| 2538 | .slave_alloc = ibmvfc_slave_alloc, |
| 2539 | .slave_configure = ibmvfc_slave_configure, |
| 2540 | .scan_finished = ibmvfc_scan_finished, |
| 2541 | .change_queue_depth = ibmvfc_change_queue_depth, |
| 2542 | .change_queue_type = ibmvfc_change_queue_type, |
| 2543 | .cmd_per_lun = 16, |
| 2544 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, |
| 2545 | .this_id = -1, |
| 2546 | .sg_tablesize = SG_ALL, |
| 2547 | .max_sectors = IBMVFC_MAX_SECTORS, |
| 2548 | .use_clustering = ENABLE_CLUSTERING, |
| 2549 | .shost_attrs = ibmvfc_attrs, |
| 2550 | }; |
| 2551 | |
| 2552 | /** |
| 2553 | * ibmvfc_next_async_crq - Returns the next entry in async queue |
| 2554 | * @vhost: ibmvfc host struct |
| 2555 | * |
| 2556 | * Returns: |
| 2557 | * Pointer to next entry in queue / NULL if empty |
| 2558 | **/ |
| 2559 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) |
| 2560 | { |
| 2561 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; |
| 2562 | struct ibmvfc_async_crq *crq; |
| 2563 | |
| 2564 | crq = &async_crq->msgs[async_crq->cur]; |
| 2565 | if (crq->valid & 0x80) { |
| 2566 | if (++async_crq->cur == async_crq->size) |
| 2567 | async_crq->cur = 0; |
| 2568 | } else |
| 2569 | crq = NULL; |
| 2570 | |
| 2571 | return crq; |
| 2572 | } |
| 2573 | |
| 2574 | /** |
| 2575 | * ibmvfc_next_crq - Returns the next entry in message queue |
| 2576 | * @vhost: ibmvfc host struct |
| 2577 | * |
| 2578 | * Returns: |
| 2579 | * Pointer to next entry in queue / NULL if empty |
| 2580 | **/ |
| 2581 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) |
| 2582 | { |
| 2583 | struct ibmvfc_crq_queue *queue = &vhost->crq; |
| 2584 | struct ibmvfc_crq *crq; |
| 2585 | |
| 2586 | crq = &queue->msgs[queue->cur]; |
| 2587 | if (crq->valid & 0x80) { |
| 2588 | if (++queue->cur == queue->size) |
| 2589 | queue->cur = 0; |
| 2590 | } else |
| 2591 | crq = NULL; |
| 2592 | |
| 2593 | return crq; |
| 2594 | } |
| 2595 | |
| 2596 | /** |
| 2597 | * ibmvfc_interrupt - Interrupt handler |
| 2598 | * @irq: number of irq to handle, not used |
| 2599 | * @dev_instance: ibmvfc_host that received interrupt |
| 2600 | * |
| 2601 | * Returns: |
| 2602 | * IRQ_HANDLED |
| 2603 | **/ |
| 2604 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) |
| 2605 | { |
| 2606 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; |
| 2607 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 2608 | struct ibmvfc_crq *crq; |
| 2609 | struct ibmvfc_async_crq *async; |
| 2610 | unsigned long flags; |
| 2611 | int done = 0; |
| 2612 | |
| 2613 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 2614 | vio_disable_interrupts(to_vio_dev(vhost->dev)); |
| 2615 | while (!done) { |
| 2616 | /* Pull all the valid messages off the CRQ */ |
| 2617 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| 2618 | ibmvfc_handle_crq(crq, vhost); |
| 2619 | crq->valid = 0; |
| 2620 | } |
| 2621 | |
| 2622 | /* Pull all the valid messages off the async CRQ */ |
| 2623 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| 2624 | ibmvfc_handle_async(async, vhost); |
| 2625 | async->valid = 0; |
| 2626 | } |
| 2627 | |
| 2628 | vio_enable_interrupts(vdev); |
| 2629 | if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| 2630 | vio_disable_interrupts(vdev); |
| 2631 | ibmvfc_handle_crq(crq, vhost); |
| 2632 | crq->valid = 0; |
| 2633 | } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| 2634 | vio_disable_interrupts(vdev); |
| 2635 | ibmvfc_handle_async(async, vhost); |
| 2636 | crq->valid = 0; |
| 2637 | } else |
| 2638 | done = 1; |
| 2639 | } |
| 2640 | |
| 2641 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 2642 | return IRQ_HANDLED; |
| 2643 | } |
| 2644 | |
| 2645 | /** |
| 2646 | * ibmvfc_init_tgt - Set the next init job step for the target |
| 2647 | * @tgt: ibmvfc target struct |
| 2648 | * @job_step: job step to perform |
| 2649 | * |
| 2650 | **/ |
| 2651 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, |
| 2652 | void (*job_step) (struct ibmvfc_target *)) |
| 2653 | { |
| 2654 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); |
| 2655 | tgt->job_step = job_step; |
| 2656 | wake_up(&tgt->vhost->work_wait_q); |
| 2657 | } |
| 2658 | |
| 2659 | /** |
| 2660 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization |
| 2661 | * @tgt: ibmvfc target struct |
| 2662 | * @job_step: initialization job step |
| 2663 | * |
| 2664 | **/ |
| 2665 | static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
| 2666 | void (*job_step) (struct ibmvfc_target *)) |
| 2667 | { |
| 2668 | if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| 2669 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 2670 | wake_up(&tgt->vhost->work_wait_q); |
| 2671 | } else |
| 2672 | ibmvfc_init_tgt(tgt, job_step); |
| 2673 | } |
| 2674 | |
| 2675 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2676 | * ibmvfc_tgt_prli_done - Completion handler for Process Login |
| 2677 | * @evt: ibmvfc event struct |
| 2678 | * |
| 2679 | **/ |
| 2680 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) |
| 2681 | { |
| 2682 | struct ibmvfc_target *tgt = evt->tgt; |
| 2683 | struct ibmvfc_host *vhost = evt->vhost; |
| 2684 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; |
| 2685 | u32 status = rsp->common.status; |
| 2686 | |
| 2687 | vhost->discovery_threads--; |
| 2688 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2689 | switch (status) { |
| 2690 | case IBMVFC_MAD_SUCCESS: |
| 2691 | tgt_dbg(tgt, "Process Login succeeded\n"); |
| 2692 | tgt->need_login = 0; |
| 2693 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); |
| 2694 | break; |
| 2695 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2696 | break; |
| 2697 | case IBMVFC_MAD_CRQ_ERROR: |
| 2698 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| 2699 | break; |
| 2700 | case IBMVFC_MAD_FAILED: |
| 2701 | default: |
| 2702 | tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", |
| 2703 | ibmvfc_get_cmd_error(rsp->status, rsp->error), |
| 2704 | rsp->status, rsp->error, status); |
| 2705 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 2706 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| 2707 | break; |
| 2708 | }; |
| 2709 | |
| 2710 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2711 | ibmvfc_free_event(evt); |
| 2712 | wake_up(&vhost->work_wait_q); |
| 2713 | } |
| 2714 | |
| 2715 | /** |
| 2716 | * ibmvfc_tgt_send_prli - Send a process login |
| 2717 | * @tgt: ibmvfc target struct |
| 2718 | * |
| 2719 | **/ |
| 2720 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) |
| 2721 | { |
| 2722 | struct ibmvfc_process_login *prli; |
| 2723 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2724 | struct ibmvfc_event *evt; |
| 2725 | |
| 2726 | if (vhost->discovery_threads >= disc_threads) |
| 2727 | return; |
| 2728 | |
| 2729 | kref_get(&tgt->kref); |
| 2730 | evt = ibmvfc_get_event(vhost); |
| 2731 | vhost->discovery_threads++; |
| 2732 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); |
| 2733 | evt->tgt = tgt; |
| 2734 | prli = &evt->iu.prli; |
| 2735 | memset(prli, 0, sizeof(*prli)); |
| 2736 | prli->common.version = 1; |
| 2737 | prli->common.opcode = IBMVFC_PROCESS_LOGIN; |
| 2738 | prli->common.length = sizeof(*prli); |
| 2739 | prli->scsi_id = tgt->scsi_id; |
| 2740 | |
| 2741 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; |
| 2742 | prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; |
| 2743 | prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; |
| 2744 | |
| 2745 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2746 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2747 | vhost->discovery_threads--; |
| 2748 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2749 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2750 | } else |
| 2751 | tgt_dbg(tgt, "Sent process login\n"); |
| 2752 | } |
| 2753 | |
| 2754 | /** |
| 2755 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login |
| 2756 | * @evt: ibmvfc event struct |
| 2757 | * |
| 2758 | **/ |
| 2759 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) |
| 2760 | { |
| 2761 | struct ibmvfc_target *tgt = evt->tgt; |
| 2762 | struct ibmvfc_host *vhost = evt->vhost; |
| 2763 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; |
| 2764 | u32 status = rsp->common.status; |
| 2765 | |
| 2766 | vhost->discovery_threads--; |
| 2767 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2768 | switch (status) { |
| 2769 | case IBMVFC_MAD_SUCCESS: |
| 2770 | tgt_dbg(tgt, "Port Login succeeded\n"); |
| 2771 | if (tgt->ids.port_name && |
| 2772 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { |
| 2773 | vhost->reinit = 1; |
| 2774 | tgt_dbg(tgt, "Port re-init required\n"); |
| 2775 | break; |
| 2776 | } |
| 2777 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
| 2778 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); |
| 2779 | tgt->ids.port_id = tgt->scsi_id; |
| 2780 | tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; |
| 2781 | memcpy(&tgt->service_parms, &rsp->service_parms, |
| 2782 | sizeof(tgt->service_parms)); |
| 2783 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, |
| 2784 | sizeof(tgt->service_parms_change)); |
| 2785 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); |
| 2786 | break; |
| 2787 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2788 | break; |
| 2789 | case IBMVFC_MAD_CRQ_ERROR: |
| 2790 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| 2791 | break; |
| 2792 | case IBMVFC_MAD_FAILED: |
| 2793 | default: |
| 2794 | tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 2795 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| 2796 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| 2797 | ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); |
| 2798 | |
| 2799 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 2800 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| 2801 | break; |
| 2802 | }; |
| 2803 | |
| 2804 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2805 | ibmvfc_free_event(evt); |
| 2806 | wake_up(&vhost->work_wait_q); |
| 2807 | } |
| 2808 | |
| 2809 | /** |
| 2810 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target |
| 2811 | * @tgt: ibmvfc target struct |
| 2812 | * |
| 2813 | **/ |
| 2814 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) |
| 2815 | { |
| 2816 | struct ibmvfc_port_login *plogi; |
| 2817 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2818 | struct ibmvfc_event *evt; |
| 2819 | |
| 2820 | if (vhost->discovery_threads >= disc_threads) |
| 2821 | return; |
| 2822 | |
| 2823 | kref_get(&tgt->kref); |
| 2824 | evt = ibmvfc_get_event(vhost); |
| 2825 | vhost->discovery_threads++; |
| 2826 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2827 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); |
| 2828 | evt->tgt = tgt; |
| 2829 | plogi = &evt->iu.plogi; |
| 2830 | memset(plogi, 0, sizeof(*plogi)); |
| 2831 | plogi->common.version = 1; |
| 2832 | plogi->common.opcode = IBMVFC_PORT_LOGIN; |
| 2833 | plogi->common.length = sizeof(*plogi); |
| 2834 | plogi->scsi_id = tgt->scsi_id; |
| 2835 | |
| 2836 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2837 | vhost->discovery_threads--; |
| 2838 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2839 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2840 | } else |
| 2841 | tgt_dbg(tgt, "Sent port login\n"); |
| 2842 | } |
| 2843 | |
| 2844 | /** |
| 2845 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD |
| 2846 | * @evt: ibmvfc event struct |
| 2847 | * |
| 2848 | **/ |
| 2849 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) |
| 2850 | { |
| 2851 | struct ibmvfc_target *tgt = evt->tgt; |
| 2852 | struct ibmvfc_host *vhost = evt->vhost; |
| 2853 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; |
| 2854 | u32 status = rsp->common.status; |
| 2855 | |
| 2856 | vhost->discovery_threads--; |
| 2857 | ibmvfc_free_event(evt); |
| 2858 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2859 | |
| 2860 | switch (status) { |
| 2861 | case IBMVFC_MAD_SUCCESS: |
| 2862 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); |
| 2863 | break; |
| 2864 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2865 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2866 | wake_up(&vhost->work_wait_q); |
| 2867 | return; |
| 2868 | case IBMVFC_MAD_FAILED: |
| 2869 | default: |
| 2870 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); |
| 2871 | break; |
| 2872 | }; |
| 2873 | |
| 2874 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) |
| 2875 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); |
| 2876 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && |
| 2877 | tgt->scsi_id != tgt->new_scsi_id) |
| 2878 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 2879 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2880 | wake_up(&vhost->work_wait_q); |
| 2881 | } |
| 2882 | |
| 2883 | /** |
| 2884 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target |
| 2885 | * @tgt: ibmvfc target struct |
| 2886 | * |
| 2887 | **/ |
| 2888 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) |
| 2889 | { |
| 2890 | struct ibmvfc_implicit_logout *mad; |
| 2891 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2892 | struct ibmvfc_event *evt; |
| 2893 | |
| 2894 | if (vhost->discovery_threads >= disc_threads) |
| 2895 | return; |
| 2896 | |
| 2897 | kref_get(&tgt->kref); |
| 2898 | evt = ibmvfc_get_event(vhost); |
| 2899 | vhost->discovery_threads++; |
| 2900 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); |
| 2901 | evt->tgt = tgt; |
| 2902 | mad = &evt->iu.implicit_logout; |
| 2903 | memset(mad, 0, sizeof(*mad)); |
| 2904 | mad->common.version = 1; |
| 2905 | mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; |
| 2906 | mad->common.length = sizeof(*mad); |
| 2907 | mad->old_scsi_id = tgt->scsi_id; |
| 2908 | |
| 2909 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2910 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2911 | vhost->discovery_threads--; |
| 2912 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2913 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2914 | } else |
| 2915 | tgt_dbg(tgt, "Sent Implicit Logout\n"); |
| 2916 | } |
| 2917 | |
| 2918 | /** |
Brian King | 989b854 | 2008-07-22 08:31:47 -0500 | [diff] [blame] | 2919 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? |
| 2920 | * @mad: ibmvfc passthru mad struct |
| 2921 | * @tgt: ibmvfc target struct |
| 2922 | * |
| 2923 | * Returns: |
| 2924 | * 1 if PLOGI needed / 0 if PLOGI not needed |
| 2925 | **/ |
| 2926 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, |
| 2927 | struct ibmvfc_target *tgt) |
| 2928 | { |
| 2929 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, |
| 2930 | sizeof(tgt->ids.port_name))) |
| 2931 | return 1; |
| 2932 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, |
| 2933 | sizeof(tgt->ids.node_name))) |
| 2934 | return 1; |
| 2935 | if (mad->fc_iu.response[6] != tgt->scsi_id) |
| 2936 | return 1; |
| 2937 | return 0; |
| 2938 | } |
| 2939 | |
| 2940 | /** |
| 2941 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC |
| 2942 | * @evt: ibmvfc event struct |
| 2943 | * |
| 2944 | **/ |
| 2945 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) |
| 2946 | { |
| 2947 | struct ibmvfc_target *tgt = evt->tgt; |
| 2948 | struct ibmvfc_host *vhost = evt->vhost; |
| 2949 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; |
| 2950 | u32 status = mad->common.status; |
| 2951 | u8 fc_reason, fc_explain; |
| 2952 | |
| 2953 | vhost->discovery_threads--; |
| 2954 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2955 | |
| 2956 | switch (status) { |
| 2957 | case IBMVFC_MAD_SUCCESS: |
| 2958 | tgt_dbg(tgt, "ADISC succeeded\n"); |
| 2959 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) |
| 2960 | tgt->need_login = 1; |
| 2961 | break; |
| 2962 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2963 | break; |
| 2964 | case IBMVFC_MAD_FAILED: |
| 2965 | default: |
| 2966 | tgt->need_login = 1; |
| 2967 | fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; |
| 2968 | fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; |
| 2969 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 2970 | ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), |
| 2971 | mad->iu.status, mad->iu.error, |
| 2972 | ibmvfc_get_fc_type(fc_reason), fc_reason, |
| 2973 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); |
| 2974 | break; |
| 2975 | }; |
| 2976 | |
| 2977 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2978 | ibmvfc_free_event(evt); |
| 2979 | wake_up(&vhost->work_wait_q); |
| 2980 | } |
| 2981 | |
| 2982 | /** |
| 2983 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru |
| 2984 | * @evt: ibmvfc event struct |
| 2985 | * |
| 2986 | **/ |
| 2987 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) |
| 2988 | { |
| 2989 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; |
| 2990 | |
| 2991 | memset(mad, 0, sizeof(*mad)); |
| 2992 | mad->common.version = 1; |
| 2993 | mad->common.opcode = IBMVFC_PASSTHRU; |
| 2994 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); |
| 2995 | mad->cmd_ioba.va = (u64)evt->crq.ioba + |
| 2996 | offsetof(struct ibmvfc_passthru_mad, iu); |
| 2997 | mad->cmd_ioba.len = sizeof(mad->iu); |
| 2998 | mad->iu.cmd_len = sizeof(mad->fc_iu.payload); |
| 2999 | mad->iu.rsp_len = sizeof(mad->fc_iu.response); |
| 3000 | mad->iu.cmd.va = (u64)evt->crq.ioba + |
| 3001 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| 3002 | offsetof(struct ibmvfc_passthru_fc_iu, payload); |
| 3003 | mad->iu.cmd.len = sizeof(mad->fc_iu.payload); |
| 3004 | mad->iu.rsp.va = (u64)evt->crq.ioba + |
| 3005 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| 3006 | offsetof(struct ibmvfc_passthru_fc_iu, response); |
| 3007 | mad->iu.rsp.len = sizeof(mad->fc_iu.response); |
| 3008 | } |
| 3009 | |
| 3010 | /** |
| 3011 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target |
| 3012 | * @tgt: ibmvfc target struct |
| 3013 | * |
| 3014 | **/ |
| 3015 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) |
| 3016 | { |
| 3017 | struct ibmvfc_passthru_mad *mad; |
| 3018 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3019 | struct ibmvfc_event *evt; |
| 3020 | |
| 3021 | if (vhost->discovery_threads >= disc_threads) |
| 3022 | return; |
| 3023 | |
| 3024 | kref_get(&tgt->kref); |
| 3025 | evt = ibmvfc_get_event(vhost); |
| 3026 | vhost->discovery_threads++; |
| 3027 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); |
| 3028 | evt->tgt = tgt; |
| 3029 | |
| 3030 | ibmvfc_init_passthru(evt); |
| 3031 | mad = &evt->iu.passthru; |
| 3032 | mad->iu.flags = IBMVFC_FC_ELS; |
| 3033 | mad->iu.scsi_id = tgt->scsi_id; |
| 3034 | |
| 3035 | mad->fc_iu.payload[0] = IBMVFC_ADISC; |
| 3036 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
| 3037 | sizeof(vhost->login_buf->resp.port_name)); |
| 3038 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, |
| 3039 | sizeof(vhost->login_buf->resp.node_name)); |
| 3040 | mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; |
| 3041 | |
| 3042 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3043 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3044 | vhost->discovery_threads--; |
| 3045 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3046 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3047 | } else |
| 3048 | tgt_dbg(tgt, "Sent ADISC\n"); |
| 3049 | } |
| 3050 | |
| 3051 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3052 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD |
| 3053 | * @evt: ibmvfc event struct |
| 3054 | * |
| 3055 | **/ |
| 3056 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) |
| 3057 | { |
| 3058 | struct ibmvfc_target *tgt = evt->tgt; |
| 3059 | struct ibmvfc_host *vhost = evt->vhost; |
| 3060 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; |
| 3061 | u32 status = rsp->common.status; |
| 3062 | |
| 3063 | vhost->discovery_threads--; |
| 3064 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3065 | switch (status) { |
| 3066 | case IBMVFC_MAD_SUCCESS: |
| 3067 | tgt_dbg(tgt, "Query Target succeeded\n"); |
| 3068 | tgt->new_scsi_id = rsp->scsi_id; |
| 3069 | if (rsp->scsi_id != tgt->scsi_id) |
| 3070 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
Brian King | 989b854 | 2008-07-22 08:31:47 -0500 | [diff] [blame] | 3071 | else |
| 3072 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3073 | break; |
| 3074 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3075 | break; |
| 3076 | case IBMVFC_MAD_CRQ_ERROR: |
| 3077 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| 3078 | break; |
| 3079 | case IBMVFC_MAD_FAILED: |
| 3080 | default: |
| 3081 | tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 3082 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| 3083 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| 3084 | ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); |
| 3085 | |
| 3086 | if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
| 3087 | rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && |
| 3088 | rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) |
| 3089 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 3090 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 3091 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| 3092 | break; |
| 3093 | }; |
| 3094 | |
| 3095 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3096 | ibmvfc_free_event(evt); |
| 3097 | wake_up(&vhost->work_wait_q); |
| 3098 | } |
| 3099 | |
| 3100 | /** |
| 3101 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target |
| 3102 | * @tgt: ibmvfc target struct |
| 3103 | * |
| 3104 | **/ |
| 3105 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) |
| 3106 | { |
| 3107 | struct ibmvfc_query_tgt *query_tgt; |
| 3108 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3109 | struct ibmvfc_event *evt; |
| 3110 | |
| 3111 | if (vhost->discovery_threads >= disc_threads) |
| 3112 | return; |
| 3113 | |
| 3114 | kref_get(&tgt->kref); |
| 3115 | evt = ibmvfc_get_event(vhost); |
| 3116 | vhost->discovery_threads++; |
| 3117 | evt->tgt = tgt; |
| 3118 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); |
| 3119 | query_tgt = &evt->iu.query_tgt; |
| 3120 | memset(query_tgt, 0, sizeof(*query_tgt)); |
| 3121 | query_tgt->common.version = 1; |
| 3122 | query_tgt->common.opcode = IBMVFC_QUERY_TARGET; |
| 3123 | query_tgt->common.length = sizeof(*query_tgt); |
| 3124 | query_tgt->wwpn = tgt->ids.port_name; |
| 3125 | |
| 3126 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3127 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3128 | vhost->discovery_threads--; |
| 3129 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3130 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3131 | } else |
| 3132 | tgt_dbg(tgt, "Sent Query Target\n"); |
| 3133 | } |
| 3134 | |
| 3135 | /** |
| 3136 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target |
| 3137 | * @vhost: ibmvfc host struct |
| 3138 | * @scsi_id: SCSI ID to allocate target for |
| 3139 | * |
| 3140 | * Returns: |
| 3141 | * 0 on success / other on failure |
| 3142 | **/ |
| 3143 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) |
| 3144 | { |
| 3145 | struct ibmvfc_target *tgt; |
| 3146 | unsigned long flags; |
| 3147 | |
| 3148 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3149 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3150 | if (tgt->scsi_id == scsi_id) { |
| 3151 | if (tgt->need_login) |
| 3152 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| 3153 | goto unlock_out; |
| 3154 | } |
| 3155 | } |
| 3156 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3157 | |
| 3158 | tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); |
| 3159 | if (!tgt) { |
| 3160 | dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", |
| 3161 | scsi_id); |
| 3162 | return -ENOMEM; |
| 3163 | } |
| 3164 | |
| 3165 | tgt->scsi_id = scsi_id; |
| 3166 | tgt->new_scsi_id = scsi_id; |
| 3167 | tgt->vhost = vhost; |
| 3168 | tgt->need_login = 1; |
| 3169 | kref_init(&tgt->kref); |
| 3170 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| 3171 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3172 | list_add_tail(&tgt->queue, &vhost->targets); |
| 3173 | |
| 3174 | unlock_out: |
| 3175 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3176 | return 0; |
| 3177 | } |
| 3178 | |
| 3179 | /** |
| 3180 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets |
| 3181 | * @vhost: ibmvfc host struct |
| 3182 | * |
| 3183 | * Returns: |
| 3184 | * 0 on success / other on failure |
| 3185 | **/ |
| 3186 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) |
| 3187 | { |
| 3188 | int i, rc; |
| 3189 | |
| 3190 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) |
| 3191 | rc = ibmvfc_alloc_target(vhost, |
| 3192 | vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); |
| 3193 | |
| 3194 | return rc; |
| 3195 | } |
| 3196 | |
| 3197 | /** |
| 3198 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD |
| 3199 | * @evt: ibmvfc event struct |
| 3200 | * |
| 3201 | **/ |
| 3202 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) |
| 3203 | { |
| 3204 | struct ibmvfc_host *vhost = evt->vhost; |
| 3205 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; |
| 3206 | u32 mad_status = rsp->common.status; |
| 3207 | |
| 3208 | switch (mad_status) { |
| 3209 | case IBMVFC_MAD_SUCCESS: |
| 3210 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); |
| 3211 | vhost->num_targets = rsp->num_written; |
| 3212 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
| 3213 | break; |
| 3214 | case IBMVFC_MAD_FAILED: |
| 3215 | dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", |
| 3216 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| 3217 | ibmvfc_retry_host_init(vhost); |
| 3218 | break; |
| 3219 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3220 | break; |
| 3221 | default: |
| 3222 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); |
| 3223 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3224 | break; |
| 3225 | } |
| 3226 | |
| 3227 | ibmvfc_free_event(evt); |
| 3228 | wake_up(&vhost->work_wait_q); |
| 3229 | } |
| 3230 | |
| 3231 | /** |
| 3232 | * ibmvfc_discover_targets - Send Discover Targets MAD |
| 3233 | * @vhost: ibmvfc host struct |
| 3234 | * |
| 3235 | **/ |
| 3236 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) |
| 3237 | { |
| 3238 | struct ibmvfc_discover_targets *mad; |
| 3239 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| 3240 | |
| 3241 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); |
| 3242 | mad = &evt->iu.discover_targets; |
| 3243 | memset(mad, 0, sizeof(*mad)); |
| 3244 | mad->common.version = 1; |
| 3245 | mad->common.opcode = IBMVFC_DISC_TARGETS; |
| 3246 | mad->common.length = sizeof(*mad); |
| 3247 | mad->bufflen = vhost->disc_buf_sz; |
| 3248 | mad->buffer.va = vhost->disc_buf_dma; |
| 3249 | mad->buffer.len = vhost->disc_buf_sz; |
| 3250 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| 3251 | |
| 3252 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| 3253 | ibmvfc_dbg(vhost, "Sent discover targets\n"); |
| 3254 | else |
| 3255 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3256 | } |
| 3257 | |
| 3258 | /** |
| 3259 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login |
| 3260 | * @evt: ibmvfc event struct |
| 3261 | * |
| 3262 | **/ |
| 3263 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) |
| 3264 | { |
| 3265 | struct ibmvfc_host *vhost = evt->vhost; |
| 3266 | u32 mad_status = evt->xfer_iu->npiv_login.common.status; |
| 3267 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
| 3268 | unsigned int npiv_max_sectors; |
| 3269 | |
| 3270 | switch (mad_status) { |
| 3271 | case IBMVFC_MAD_SUCCESS: |
| 3272 | ibmvfc_free_event(evt); |
| 3273 | break; |
| 3274 | case IBMVFC_MAD_FAILED: |
| 3275 | dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", |
| 3276 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| 3277 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 3278 | ibmvfc_retry_host_init(vhost); |
| 3279 | else |
| 3280 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3281 | ibmvfc_free_event(evt); |
| 3282 | return; |
| 3283 | case IBMVFC_MAD_CRQ_ERROR: |
| 3284 | ibmvfc_retry_host_init(vhost); |
| 3285 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3286 | ibmvfc_free_event(evt); |
| 3287 | return; |
| 3288 | default: |
| 3289 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); |
| 3290 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3291 | ibmvfc_free_event(evt); |
| 3292 | return; |
| 3293 | } |
| 3294 | |
| 3295 | vhost->client_migrated = 0; |
| 3296 | |
| 3297 | if (!(rsp->flags & IBMVFC_NATIVE_FC)) { |
| 3298 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
| 3299 | rsp->flags); |
| 3300 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3301 | wake_up(&vhost->work_wait_q); |
| 3302 | return; |
| 3303 | } |
| 3304 | |
| 3305 | if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { |
| 3306 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
| 3307 | rsp->max_cmds); |
| 3308 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3309 | wake_up(&vhost->work_wait_q); |
| 3310 | return; |
| 3311 | } |
| 3312 | |
| 3313 | npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); |
| 3314 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
| 3315 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, |
| 3316 | rsp->drc_name, npiv_max_sectors); |
| 3317 | |
| 3318 | fc_host_fabric_name(vhost->host) = rsp->node_name; |
| 3319 | fc_host_node_name(vhost->host) = rsp->node_name; |
| 3320 | fc_host_port_name(vhost->host) = rsp->port_name; |
| 3321 | fc_host_port_id(vhost->host) = rsp->scsi_id; |
| 3322 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
| 3323 | fc_host_supported_classes(vhost->host) = 0; |
| 3324 | if (rsp->service_parms.class1_parms[0] & 0x80000000) |
| 3325 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
| 3326 | if (rsp->service_parms.class2_parms[0] & 0x80000000) |
| 3327 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
| 3328 | if (rsp->service_parms.class3_parms[0] & 0x80000000) |
| 3329 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
| 3330 | fc_host_maxframe_size(vhost->host) = |
| 3331 | rsp->service_parms.common.bb_rcv_sz & 0x0fff; |
| 3332 | |
| 3333 | vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; |
| 3334 | vhost->host->max_sectors = npiv_max_sectors; |
| 3335 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 3336 | wake_up(&vhost->work_wait_q); |
| 3337 | } |
| 3338 | |
| 3339 | /** |
| 3340 | * ibmvfc_npiv_login - Sends NPIV login |
| 3341 | * @vhost: ibmvfc host struct |
| 3342 | * |
| 3343 | **/ |
| 3344 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) |
| 3345 | { |
| 3346 | struct ibmvfc_npiv_login_mad *mad; |
| 3347 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| 3348 | |
| 3349 | ibmvfc_gather_partition_info(vhost); |
| 3350 | ibmvfc_set_login_info(vhost); |
| 3351 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); |
| 3352 | |
| 3353 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); |
| 3354 | mad = &evt->iu.npiv_login; |
| 3355 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); |
| 3356 | mad->common.version = 1; |
| 3357 | mad->common.opcode = IBMVFC_NPIV_LOGIN; |
| 3358 | mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); |
| 3359 | mad->buffer.va = vhost->login_buf_dma; |
| 3360 | mad->buffer.len = sizeof(*vhost->login_buf); |
| 3361 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3362 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| 3363 | |
| 3364 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| 3365 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); |
| 3366 | else |
| 3367 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3368 | }; |
| 3369 | |
| 3370 | /** |
| 3371 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? |
| 3372 | * @vhost: ibmvfc host struct |
| 3373 | * |
| 3374 | * Returns: |
| 3375 | * 1 if work to do / 0 if not |
| 3376 | **/ |
| 3377 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) |
| 3378 | { |
| 3379 | struct ibmvfc_target *tgt; |
| 3380 | |
| 3381 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3382 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || |
| 3383 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| 3384 | return 1; |
| 3385 | } |
| 3386 | |
| 3387 | return 0; |
| 3388 | } |
| 3389 | |
| 3390 | /** |
| 3391 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) |
| 3392 | * @vhost: ibmvfc host struct |
| 3393 | * |
| 3394 | * Returns: |
| 3395 | * 1 if work to do / 0 if not |
| 3396 | **/ |
| 3397 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| 3398 | { |
| 3399 | struct ibmvfc_target *tgt; |
| 3400 | |
| 3401 | if (kthread_should_stop()) |
| 3402 | return 1; |
| 3403 | switch (vhost->action) { |
| 3404 | case IBMVFC_HOST_ACTION_NONE: |
| 3405 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 3406 | return 0; |
| 3407 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 3408 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 3409 | if (vhost->discovery_threads == disc_threads) |
| 3410 | return 0; |
| 3411 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3412 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) |
| 3413 | return 1; |
| 3414 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3415 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| 3416 | return 0; |
| 3417 | return 1; |
| 3418 | case IBMVFC_HOST_ACTION_INIT: |
| 3419 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 3420 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 3421 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 3422 | case IBMVFC_HOST_ACTION_QUERY: |
| 3423 | default: |
| 3424 | break; |
| 3425 | }; |
| 3426 | |
| 3427 | return 1; |
| 3428 | } |
| 3429 | |
| 3430 | /** |
| 3431 | * ibmvfc_work_to_do - Is there task level work to do? |
| 3432 | * @vhost: ibmvfc host struct |
| 3433 | * |
| 3434 | * Returns: |
| 3435 | * 1 if work to do / 0 if not |
| 3436 | **/ |
| 3437 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| 3438 | { |
| 3439 | unsigned long flags; |
| 3440 | int rc; |
| 3441 | |
| 3442 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3443 | rc = __ibmvfc_work_to_do(vhost); |
| 3444 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3445 | return rc; |
| 3446 | } |
| 3447 | |
| 3448 | /** |
| 3449 | * ibmvfc_log_ae - Log async events if necessary |
| 3450 | * @vhost: ibmvfc host struct |
| 3451 | * @events: events to log |
| 3452 | * |
| 3453 | **/ |
| 3454 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) |
| 3455 | { |
| 3456 | if (events & IBMVFC_AE_RSCN) |
| 3457 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); |
| 3458 | if ((events & IBMVFC_AE_LINKDOWN) && |
| 3459 | vhost->state >= IBMVFC_HALTED) |
| 3460 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); |
| 3461 | if ((events & IBMVFC_AE_LINKUP) && |
| 3462 | vhost->state == IBMVFC_INITIALIZING) |
| 3463 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); |
| 3464 | } |
| 3465 | |
| 3466 | /** |
| 3467 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port |
| 3468 | * @tgt: ibmvfc target struct |
| 3469 | * |
| 3470 | **/ |
| 3471 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) |
| 3472 | { |
| 3473 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3474 | struct fc_rport *rport; |
| 3475 | unsigned long flags; |
| 3476 | |
| 3477 | tgt_dbg(tgt, "Adding rport\n"); |
| 3478 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); |
| 3479 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3480 | tgt->rport = rport; |
| 3481 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3482 | if (rport) { |
| 3483 | tgt_dbg(tgt, "rport add succeeded\n"); |
| 3484 | rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; |
| 3485 | rport->supported_classes = 0; |
Brian King | 52d7e86 | 2008-07-22 08:31:46 -0500 | [diff] [blame] | 3486 | tgt->target_id = rport->scsi_target_id; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3487 | if (tgt->service_parms.class1_parms[0] & 0x80000000) |
| 3488 | rport->supported_classes |= FC_COS_CLASS1; |
| 3489 | if (tgt->service_parms.class2_parms[0] & 0x80000000) |
| 3490 | rport->supported_classes |= FC_COS_CLASS2; |
| 3491 | if (tgt->service_parms.class3_parms[0] & 0x80000000) |
| 3492 | rport->supported_classes |= FC_COS_CLASS3; |
| 3493 | } else |
| 3494 | tgt_dbg(tgt, "rport add failed\n"); |
| 3495 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3496 | } |
| 3497 | |
| 3498 | /** |
| 3499 | * ibmvfc_do_work - Do task level work |
| 3500 | * @vhost: ibmvfc host struct |
| 3501 | * |
| 3502 | **/ |
| 3503 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) |
| 3504 | { |
| 3505 | struct ibmvfc_target *tgt; |
| 3506 | unsigned long flags; |
| 3507 | struct fc_rport *rport; |
| 3508 | |
| 3509 | ibmvfc_log_ae(vhost, vhost->events_to_log); |
| 3510 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3511 | vhost->events_to_log = 0; |
| 3512 | switch (vhost->action) { |
| 3513 | case IBMVFC_HOST_ACTION_NONE: |
| 3514 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 3515 | break; |
| 3516 | case IBMVFC_HOST_ACTION_INIT: |
| 3517 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); |
| 3518 | vhost->job_step(vhost); |
| 3519 | break; |
| 3520 | case IBMVFC_HOST_ACTION_QUERY: |
| 3521 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3522 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); |
| 3523 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); |
| 3524 | break; |
| 3525 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 3526 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3527 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| 3528 | tgt->job_step(tgt); |
| 3529 | break; |
| 3530 | } |
| 3531 | } |
| 3532 | |
| 3533 | if (!ibmvfc_dev_init_to_do(vhost)) |
| 3534 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| 3535 | break; |
| 3536 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 3537 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3538 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| 3539 | tgt_dbg(tgt, "Deleting rport\n"); |
| 3540 | rport = tgt->rport; |
| 3541 | tgt->rport = NULL; |
| 3542 | list_del(&tgt->queue); |
| 3543 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3544 | if (rport) |
| 3545 | fc_remote_port_delete(rport); |
| 3546 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3547 | return; |
| 3548 | } |
| 3549 | } |
| 3550 | |
| 3551 | if (vhost->state == IBMVFC_INITIALIZING) { |
| 3552 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 3553 | vhost->job_step = ibmvfc_discover_targets; |
| 3554 | } else { |
| 3555 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 3556 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3557 | scsi_unblock_requests(vhost->host); |
| 3558 | wake_up(&vhost->init_wait_q); |
| 3559 | return; |
| 3560 | } |
| 3561 | break; |
| 3562 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 3563 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); |
| 3564 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3565 | ibmvfc_alloc_targets(vhost); |
| 3566 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3567 | break; |
| 3568 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 3569 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3570 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| 3571 | tgt->job_step(tgt); |
| 3572 | break; |
| 3573 | } |
| 3574 | } |
| 3575 | |
| 3576 | if (!ibmvfc_dev_init_to_do(vhost)) { |
| 3577 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); |
| 3578 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); |
| 3579 | vhost->init_retries = 0; |
| 3580 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3581 | scsi_unblock_requests(vhost->host); |
| 3582 | return; |
| 3583 | } |
| 3584 | break; |
| 3585 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 3586 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3587 | if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { |
| 3588 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3589 | ibmvfc_tgt_add_rport(tgt); |
| 3590 | return; |
| 3591 | } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| 3592 | tgt_dbg(tgt, "Deleting rport\n"); |
| 3593 | rport = tgt->rport; |
| 3594 | tgt->rport = NULL; |
| 3595 | list_del(&tgt->queue); |
| 3596 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3597 | if (rport) |
| 3598 | fc_remote_port_delete(rport); |
| 3599 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3600 | return; |
| 3601 | } |
| 3602 | } |
| 3603 | |
Brian King | 915be02 | 2008-08-15 10:59:22 -0500 | [diff] [blame] | 3604 | if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3605 | vhost->reinit = 0; |
Brian King | 915be02 | 2008-08-15 10:59:22 -0500 | [diff] [blame] | 3606 | scsi_block_requests(vhost->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3607 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 3608 | } else { |
| 3609 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 3610 | wake_up(&vhost->init_wait_q); |
| 3611 | } |
| 3612 | break; |
| 3613 | default: |
| 3614 | break; |
| 3615 | }; |
| 3616 | |
| 3617 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3618 | } |
| 3619 | |
| 3620 | /** |
| 3621 | * ibmvfc_work - Do task level work |
| 3622 | * @data: ibmvfc host struct |
| 3623 | * |
| 3624 | * Returns: |
| 3625 | * zero |
| 3626 | **/ |
| 3627 | static int ibmvfc_work(void *data) |
| 3628 | { |
| 3629 | struct ibmvfc_host *vhost = data; |
| 3630 | int rc; |
| 3631 | |
| 3632 | set_user_nice(current, -20); |
| 3633 | |
| 3634 | while (1) { |
| 3635 | rc = wait_event_interruptible(vhost->work_wait_q, |
| 3636 | ibmvfc_work_to_do(vhost)); |
| 3637 | |
| 3638 | BUG_ON(rc); |
| 3639 | |
| 3640 | if (kthread_should_stop()) |
| 3641 | break; |
| 3642 | |
| 3643 | ibmvfc_do_work(vhost); |
| 3644 | } |
| 3645 | |
| 3646 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); |
| 3647 | return 0; |
| 3648 | } |
| 3649 | |
| 3650 | /** |
| 3651 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor |
| 3652 | * @vhost: ibmvfc host struct |
| 3653 | * |
| 3654 | * Allocates a page for messages, maps it for dma, and registers |
| 3655 | * the crq with the hypervisor. |
| 3656 | * |
| 3657 | * Return value: |
| 3658 | * zero on success / other on failure |
| 3659 | **/ |
| 3660 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) |
| 3661 | { |
| 3662 | int rc, retrc = -ENOMEM; |
| 3663 | struct device *dev = vhost->dev; |
| 3664 | struct vio_dev *vdev = to_vio_dev(dev); |
| 3665 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 3666 | |
| 3667 | ENTER; |
| 3668 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); |
| 3669 | |
| 3670 | if (!crq->msgs) |
| 3671 | return -ENOMEM; |
| 3672 | |
| 3673 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); |
| 3674 | crq->msg_token = dma_map_single(dev, crq->msgs, |
| 3675 | PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 3676 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 3677 | if (dma_mapping_error(dev, crq->msg_token)) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3678 | goto map_failed; |
| 3679 | |
| 3680 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| 3681 | crq->msg_token, PAGE_SIZE); |
| 3682 | |
| 3683 | if (rc == H_RESOURCE) |
| 3684 | /* maybe kexecing and resource is busy. try a reset */ |
| 3685 | retrc = rc = ibmvfc_reset_crq(vhost); |
| 3686 | |
| 3687 | if (rc == H_CLOSED) |
| 3688 | dev_warn(dev, "Partner adapter not ready\n"); |
| 3689 | else if (rc) { |
| 3690 | dev_warn(dev, "Error %d opening adapter\n", rc); |
| 3691 | goto reg_crq_failed; |
| 3692 | } |
| 3693 | |
| 3694 | retrc = 0; |
| 3695 | |
| 3696 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
| 3697 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); |
| 3698 | goto req_irq_failed; |
| 3699 | } |
| 3700 | |
| 3701 | if ((rc = vio_enable_interrupts(vdev))) { |
| 3702 | dev_err(dev, "Error %d enabling interrupts\n", rc); |
| 3703 | goto req_irq_failed; |
| 3704 | } |
| 3705 | |
| 3706 | crq->cur = 0; |
| 3707 | LEAVE; |
| 3708 | return retrc; |
| 3709 | |
| 3710 | req_irq_failed: |
| 3711 | do { |
| 3712 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 3713 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 3714 | reg_crq_failed: |
| 3715 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 3716 | map_failed: |
| 3717 | free_page((unsigned long)crq->msgs); |
| 3718 | return retrc; |
| 3719 | } |
| 3720 | |
| 3721 | /** |
| 3722 | * ibmvfc_free_mem - Free memory for vhost |
| 3723 | * @vhost: ibmvfc host struct |
| 3724 | * |
| 3725 | * Return value: |
| 3726 | * none |
| 3727 | **/ |
| 3728 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) |
| 3729 | { |
| 3730 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| 3731 | |
| 3732 | ENTER; |
| 3733 | mempool_destroy(vhost->tgt_pool); |
| 3734 | kfree(vhost->trace); |
| 3735 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, |
| 3736 | vhost->disc_buf_dma); |
| 3737 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), |
| 3738 | vhost->login_buf, vhost->login_buf_dma); |
| 3739 | dma_pool_destroy(vhost->sg_pool); |
| 3740 | dma_unmap_single(vhost->dev, async_q->msg_token, |
| 3741 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| 3742 | free_page((unsigned long)async_q->msgs); |
| 3743 | LEAVE; |
| 3744 | } |
| 3745 | |
| 3746 | /** |
| 3747 | * ibmvfc_alloc_mem - Allocate memory for vhost |
| 3748 | * @vhost: ibmvfc host struct |
| 3749 | * |
| 3750 | * Return value: |
| 3751 | * 0 on success / non-zero on failure |
| 3752 | **/ |
| 3753 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) |
| 3754 | { |
| 3755 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| 3756 | struct device *dev = vhost->dev; |
| 3757 | |
| 3758 | ENTER; |
| 3759 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); |
| 3760 | if (!async_q->msgs) { |
| 3761 | dev_err(dev, "Couldn't allocate async queue.\n"); |
| 3762 | goto nomem; |
| 3763 | } |
| 3764 | |
| 3765 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); |
| 3766 | async_q->msg_token = dma_map_single(dev, async_q->msgs, |
| 3767 | async_q->size * sizeof(*async_q->msgs), |
| 3768 | DMA_BIDIRECTIONAL); |
| 3769 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 3770 | if (dma_mapping_error(dev, async_q->msg_token)) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3771 | dev_err(dev, "Failed to map async queue\n"); |
| 3772 | goto free_async_crq; |
| 3773 | } |
| 3774 | |
| 3775 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, |
| 3776 | SG_ALL * sizeof(struct srp_direct_buf), |
| 3777 | sizeof(struct srp_direct_buf), 0); |
| 3778 | |
| 3779 | if (!vhost->sg_pool) { |
| 3780 | dev_err(dev, "Failed to allocate sg pool\n"); |
| 3781 | goto unmap_async_crq; |
| 3782 | } |
| 3783 | |
| 3784 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), |
| 3785 | &vhost->login_buf_dma, GFP_KERNEL); |
| 3786 | |
| 3787 | if (!vhost->login_buf) { |
| 3788 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); |
| 3789 | goto free_sg_pool; |
| 3790 | } |
| 3791 | |
| 3792 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; |
| 3793 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, |
| 3794 | &vhost->disc_buf_dma, GFP_KERNEL); |
| 3795 | |
| 3796 | if (!vhost->disc_buf) { |
| 3797 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); |
| 3798 | goto free_login_buffer; |
| 3799 | } |
| 3800 | |
| 3801 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, |
| 3802 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); |
| 3803 | |
| 3804 | if (!vhost->trace) |
| 3805 | goto free_disc_buffer; |
| 3806 | |
| 3807 | vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
| 3808 | sizeof(struct ibmvfc_target)); |
| 3809 | |
| 3810 | if (!vhost->tgt_pool) { |
| 3811 | dev_err(dev, "Couldn't allocate target memory pool\n"); |
| 3812 | goto free_trace; |
| 3813 | } |
| 3814 | |
| 3815 | LEAVE; |
| 3816 | return 0; |
| 3817 | |
| 3818 | free_trace: |
| 3819 | kfree(vhost->trace); |
| 3820 | free_disc_buffer: |
| 3821 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, |
| 3822 | vhost->disc_buf_dma); |
| 3823 | free_login_buffer: |
| 3824 | dma_free_coherent(dev, sizeof(*vhost->login_buf), |
| 3825 | vhost->login_buf, vhost->login_buf_dma); |
| 3826 | free_sg_pool: |
| 3827 | dma_pool_destroy(vhost->sg_pool); |
| 3828 | unmap_async_crq: |
| 3829 | dma_unmap_single(dev, async_q->msg_token, |
| 3830 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| 3831 | free_async_crq: |
| 3832 | free_page((unsigned long)async_q->msgs); |
| 3833 | nomem: |
| 3834 | LEAVE; |
| 3835 | return -ENOMEM; |
| 3836 | } |
| 3837 | |
| 3838 | /** |
| 3839 | * ibmvfc_probe - Adapter hot plug add entry point |
| 3840 | * @vdev: vio device struct |
| 3841 | * @id: vio device id struct |
| 3842 | * |
| 3843 | * Return value: |
| 3844 | * 0 on success / non-zero on failure |
| 3845 | **/ |
| 3846 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| 3847 | { |
| 3848 | struct ibmvfc_host *vhost; |
| 3849 | struct Scsi_Host *shost; |
| 3850 | struct device *dev = &vdev->dev; |
| 3851 | int rc = -ENOMEM; |
| 3852 | |
| 3853 | ENTER; |
| 3854 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); |
| 3855 | if (!shost) { |
| 3856 | dev_err(dev, "Couldn't allocate host data\n"); |
| 3857 | goto out; |
| 3858 | } |
| 3859 | |
| 3860 | shost->transportt = ibmvfc_transport_template; |
| 3861 | shost->can_queue = max_requests; |
| 3862 | shost->max_lun = max_lun; |
| 3863 | shost->max_id = max_targets; |
| 3864 | shost->max_sectors = IBMVFC_MAX_SECTORS; |
| 3865 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; |
| 3866 | shost->unique_id = shost->host_no; |
| 3867 | |
| 3868 | vhost = shost_priv(shost); |
| 3869 | INIT_LIST_HEAD(&vhost->sent); |
| 3870 | INIT_LIST_HEAD(&vhost->free); |
| 3871 | INIT_LIST_HEAD(&vhost->targets); |
| 3872 | sprintf(vhost->name, IBMVFC_NAME); |
| 3873 | vhost->host = shost; |
| 3874 | vhost->dev = dev; |
| 3875 | vhost->partition_number = -1; |
| 3876 | vhost->log_level = log_level; |
| 3877 | strcpy(vhost->partition_name, "UNKNOWN"); |
| 3878 | init_waitqueue_head(&vhost->work_wait_q); |
| 3879 | init_waitqueue_head(&vhost->init_wait_q); |
| 3880 | |
| 3881 | if ((rc = ibmvfc_alloc_mem(vhost))) |
| 3882 | goto free_scsi_host; |
| 3883 | |
| 3884 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, |
| 3885 | shost->host_no); |
| 3886 | |
| 3887 | if (IS_ERR(vhost->work_thread)) { |
| 3888 | dev_err(dev, "Couldn't create kernel thread: %ld\n", |
| 3889 | PTR_ERR(vhost->work_thread)); |
| 3890 | goto free_host_mem; |
| 3891 | } |
| 3892 | |
| 3893 | if ((rc = ibmvfc_init_crq(vhost))) { |
| 3894 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); |
| 3895 | goto kill_kthread; |
| 3896 | } |
| 3897 | |
| 3898 | if ((rc = ibmvfc_init_event_pool(vhost))) { |
| 3899 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); |
| 3900 | goto release_crq; |
| 3901 | } |
| 3902 | |
| 3903 | if ((rc = scsi_add_host(shost, dev))) |
| 3904 | goto release_event_pool; |
| 3905 | |
| 3906 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
| 3907 | &ibmvfc_trace_attr))) { |
| 3908 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); |
| 3909 | goto remove_shost; |
| 3910 | } |
| 3911 | |
| 3912 | dev_set_drvdata(dev, vhost); |
| 3913 | spin_lock(&ibmvfc_driver_lock); |
| 3914 | list_add_tail(&vhost->queue, &ibmvfc_head); |
| 3915 | spin_unlock(&ibmvfc_driver_lock); |
| 3916 | |
| 3917 | ibmvfc_send_crq_init(vhost); |
| 3918 | scsi_scan_host(shost); |
| 3919 | return 0; |
| 3920 | |
| 3921 | remove_shost: |
| 3922 | scsi_remove_host(shost); |
| 3923 | release_event_pool: |
| 3924 | ibmvfc_free_event_pool(vhost); |
| 3925 | release_crq: |
| 3926 | ibmvfc_release_crq_queue(vhost); |
| 3927 | kill_kthread: |
| 3928 | kthread_stop(vhost->work_thread); |
| 3929 | free_host_mem: |
| 3930 | ibmvfc_free_mem(vhost); |
| 3931 | free_scsi_host: |
| 3932 | scsi_host_put(shost); |
| 3933 | out: |
| 3934 | LEAVE; |
| 3935 | return rc; |
| 3936 | } |
| 3937 | |
| 3938 | /** |
| 3939 | * ibmvfc_remove - Adapter hot plug remove entry point |
| 3940 | * @vdev: vio device struct |
| 3941 | * |
| 3942 | * Return value: |
| 3943 | * 0 |
| 3944 | **/ |
| 3945 | static int ibmvfc_remove(struct vio_dev *vdev) |
| 3946 | { |
| 3947 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); |
| 3948 | unsigned long flags; |
| 3949 | |
| 3950 | ENTER; |
| 3951 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); |
Brian King | 2d0da2a | 2008-07-22 08:31:42 -0500 | [diff] [blame] | 3952 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 3953 | ibmvfc_wait_while_resetting(vhost); |
| 3954 | ibmvfc_release_crq_queue(vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3955 | kthread_stop(vhost->work_thread); |
| 3956 | fc_remove_host(vhost->host); |
| 3957 | scsi_remove_host(vhost->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3958 | |
| 3959 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3960 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 3961 | ibmvfc_free_event_pool(vhost); |
| 3962 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3963 | |
| 3964 | ibmvfc_free_mem(vhost); |
| 3965 | spin_lock(&ibmvfc_driver_lock); |
| 3966 | list_del(&vhost->queue); |
| 3967 | spin_unlock(&ibmvfc_driver_lock); |
| 3968 | scsi_host_put(vhost->host); |
| 3969 | LEAVE; |
| 3970 | return 0; |
| 3971 | } |
| 3972 | |
Brian King | 39c1ffe | 2008-07-24 04:35:48 +1000 | [diff] [blame] | 3973 | /** |
| 3974 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver |
| 3975 | * @vdev: vio device struct |
| 3976 | * |
| 3977 | * Return value: |
| 3978 | * Number of bytes the driver will need to DMA map at the same time in |
| 3979 | * order to perform well. |
| 3980 | */ |
| 3981 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) |
| 3982 | { |
| 3983 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); |
| 3984 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); |
| 3985 | } |
| 3986 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3987 | static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
| 3988 | {"fcp", "IBM,vfc-client"}, |
| 3989 | { "", "" } |
| 3990 | }; |
| 3991 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); |
| 3992 | |
| 3993 | static struct vio_driver ibmvfc_driver = { |
| 3994 | .id_table = ibmvfc_device_table, |
| 3995 | .probe = ibmvfc_probe, |
| 3996 | .remove = ibmvfc_remove, |
Brian King | 39c1ffe | 2008-07-24 04:35:48 +1000 | [diff] [blame] | 3997 | .get_desired_dma = ibmvfc_get_desired_dma, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3998 | .driver = { |
| 3999 | .name = IBMVFC_NAME, |
| 4000 | .owner = THIS_MODULE, |
| 4001 | } |
| 4002 | }; |
| 4003 | |
| 4004 | static struct fc_function_template ibmvfc_transport_functions = { |
| 4005 | .show_host_fabric_name = 1, |
| 4006 | .show_host_node_name = 1, |
| 4007 | .show_host_port_name = 1, |
| 4008 | .show_host_supported_classes = 1, |
| 4009 | .show_host_port_type = 1, |
| 4010 | .show_host_port_id = 1, |
| 4011 | |
| 4012 | .get_host_port_state = ibmvfc_get_host_port_state, |
| 4013 | .show_host_port_state = 1, |
| 4014 | |
| 4015 | .get_host_speed = ibmvfc_get_host_speed, |
| 4016 | .show_host_speed = 1, |
| 4017 | |
| 4018 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, |
| 4019 | .terminate_rport_io = ibmvfc_terminate_rport_io, |
| 4020 | |
| 4021 | .show_rport_maxframe_size = 1, |
| 4022 | .show_rport_supported_classes = 1, |
| 4023 | |
| 4024 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, |
| 4025 | .show_rport_dev_loss_tmo = 1, |
| 4026 | |
| 4027 | .get_starget_node_name = ibmvfc_get_starget_node_name, |
| 4028 | .show_starget_node_name = 1, |
| 4029 | |
| 4030 | .get_starget_port_name = ibmvfc_get_starget_port_name, |
| 4031 | .show_starget_port_name = 1, |
| 4032 | |
| 4033 | .get_starget_port_id = ibmvfc_get_starget_port_id, |
| 4034 | .show_starget_port_id = 1, |
| 4035 | }; |
| 4036 | |
| 4037 | /** |
| 4038 | * ibmvfc_module_init - Initialize the ibmvfc module |
| 4039 | * |
| 4040 | * Return value: |
| 4041 | * 0 on success / other on failure |
| 4042 | **/ |
| 4043 | static int __init ibmvfc_module_init(void) |
| 4044 | { |
| 4045 | int rc; |
| 4046 | |
| 4047 | if (!firmware_has_feature(FW_FEATURE_VIO)) |
| 4048 | return -ENODEV; |
| 4049 | |
| 4050 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", |
| 4051 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); |
| 4052 | |
| 4053 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); |
| 4054 | if (!ibmvfc_transport_template) |
| 4055 | return -ENOMEM; |
| 4056 | |
| 4057 | rc = vio_register_driver(&ibmvfc_driver); |
| 4058 | if (rc) |
| 4059 | fc_release_transport(ibmvfc_transport_template); |
| 4060 | return rc; |
| 4061 | } |
| 4062 | |
| 4063 | /** |
| 4064 | * ibmvfc_module_exit - Teardown the ibmvfc module |
| 4065 | * |
| 4066 | * Return value: |
| 4067 | * nothing |
| 4068 | **/ |
| 4069 | static void __exit ibmvfc_module_exit(void) |
| 4070 | { |
| 4071 | vio_unregister_driver(&ibmvfc_driver); |
| 4072 | fc_release_transport(ibmvfc_transport_template); |
| 4073 | } |
| 4074 | |
| 4075 | module_init(ibmvfc_module_init); |
| 4076 | module_exit(ibmvfc_module_exit); |