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" }, |
Brian King | 752b323 | 2008-12-15 17:09:05 -0600 | [diff] [blame] | 104 | { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 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" }, |
Brian King | 752b323 | 2008-12-15 17:09:05 -0600 | [diff] [blame] | 118 | { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, |
| 119 | { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 120 | { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
Brian King | 752b323 | 2008-12-15 17:09:05 -0600 | [diff] [blame] | 121 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, |
| 122 | { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 123 | { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
Brian King | 646d385 | 2008-11-14 13:33:53 -0600 | [diff] [blame] | 124 | { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 125 | { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
| 126 | |
| 127 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, |
| 128 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, |
| 129 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, |
| 130 | { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, |
| 131 | { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, |
| 132 | { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, |
| 133 | { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, |
| 134 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, |
| 135 | { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, |
| 136 | { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, |
| 137 | { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, |
| 138 | |
| 139 | { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, |
| 140 | }; |
| 141 | |
| 142 | static void ibmvfc_npiv_login(struct ibmvfc_host *); |
| 143 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); |
| 144 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); |
| 145 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *); |
| 146 | |
| 147 | static const char *unknown_error = "unknown error"; |
| 148 | |
| 149 | #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| 150 | /** |
| 151 | * ibmvfc_trc_start - Log a start trace entry |
| 152 | * @evt: ibmvfc event struct |
| 153 | * |
| 154 | **/ |
| 155 | static void ibmvfc_trc_start(struct ibmvfc_event *evt) |
| 156 | { |
| 157 | struct ibmvfc_host *vhost = evt->vhost; |
| 158 | struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; |
| 159 | struct ibmvfc_mad_common *mad = &evt->iu.mad_common; |
| 160 | struct ibmvfc_trace_entry *entry; |
| 161 | |
| 162 | entry = &vhost->trace[vhost->trace_index++]; |
| 163 | entry->evt = evt; |
| 164 | entry->time = jiffies; |
| 165 | entry->fmt = evt->crq.format; |
| 166 | entry->type = IBMVFC_TRC_START; |
| 167 | |
| 168 | switch (entry->fmt) { |
| 169 | case IBMVFC_CMD_FORMAT: |
| 170 | entry->op_code = vfc_cmd->iu.cdb[0]; |
| 171 | entry->scsi_id = vfc_cmd->tgt_scsi_id; |
| 172 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
| 173 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; |
| 174 | entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; |
| 175 | break; |
| 176 | case IBMVFC_MAD_FORMAT: |
| 177 | entry->op_code = mad->opcode; |
| 178 | break; |
| 179 | default: |
| 180 | break; |
| 181 | }; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * ibmvfc_trc_end - Log an end trace entry |
| 186 | * @evt: ibmvfc event struct |
| 187 | * |
| 188 | **/ |
| 189 | static void ibmvfc_trc_end(struct ibmvfc_event *evt) |
| 190 | { |
| 191 | struct ibmvfc_host *vhost = evt->vhost; |
| 192 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 193 | struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; |
| 194 | struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; |
| 195 | |
| 196 | entry->evt = evt; |
| 197 | entry->time = jiffies; |
| 198 | entry->fmt = evt->crq.format; |
| 199 | entry->type = IBMVFC_TRC_END; |
| 200 | |
| 201 | switch (entry->fmt) { |
| 202 | case IBMVFC_CMD_FORMAT: |
| 203 | entry->op_code = vfc_cmd->iu.cdb[0]; |
| 204 | entry->scsi_id = vfc_cmd->tgt_scsi_id; |
| 205 | entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
| 206 | entry->tmf_flags = vfc_cmd->iu.tmf_flags; |
| 207 | entry->u.end.status = vfc_cmd->status; |
| 208 | entry->u.end.error = vfc_cmd->error; |
| 209 | entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; |
| 210 | entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; |
| 211 | entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; |
| 212 | break; |
| 213 | case IBMVFC_MAD_FORMAT: |
| 214 | entry->op_code = mad->opcode; |
| 215 | entry->u.end.status = mad->status; |
| 216 | break; |
| 217 | default: |
| 218 | break; |
| 219 | |
| 220 | }; |
| 221 | } |
| 222 | |
| 223 | #else |
| 224 | #define ibmvfc_trc_start(evt) do { } while (0) |
| 225 | #define ibmvfc_trc_end(evt) do { } while (0) |
| 226 | #endif |
| 227 | |
| 228 | /** |
| 229 | * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response |
| 230 | * @status: status / error class |
| 231 | * @error: error |
| 232 | * |
| 233 | * Return value: |
| 234 | * index into cmd_status / -EINVAL on failure |
| 235 | **/ |
| 236 | static int ibmvfc_get_err_index(u16 status, u16 error) |
| 237 | { |
| 238 | int i; |
| 239 | |
| 240 | for (i = 0; i < ARRAY_SIZE(cmd_status); i++) |
| 241 | if ((cmd_status[i].status & status) == cmd_status[i].status && |
| 242 | cmd_status[i].error == error) |
| 243 | return i; |
| 244 | |
| 245 | return -EINVAL; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * ibmvfc_get_cmd_error - Find the error description for the fcp response |
| 250 | * @status: status / error class |
| 251 | * @error: error |
| 252 | * |
| 253 | * Return value: |
| 254 | * error description string |
| 255 | **/ |
| 256 | static const char *ibmvfc_get_cmd_error(u16 status, u16 error) |
| 257 | { |
| 258 | int rc = ibmvfc_get_err_index(status, error); |
| 259 | if (rc >= 0) |
| 260 | return cmd_status[rc].name; |
| 261 | return unknown_error; |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * ibmvfc_get_err_result - Find the scsi status to return for the fcp response |
| 266 | * @vfc_cmd: ibmvfc command struct |
| 267 | * |
| 268 | * Return value: |
| 269 | * SCSI result value to return for completed command |
| 270 | **/ |
| 271 | static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) |
| 272 | { |
| 273 | int err; |
| 274 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 275 | int fc_rsp_len = rsp->fcp_rsp_len; |
| 276 | |
| 277 | if ((rsp->flags & FCP_RSP_LEN_VALID) && |
| 278 | ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
| 279 | rsp->data.info.rsp_code)) |
| 280 | return DID_ERROR << 16; |
| 281 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 282 | err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| 283 | if (err >= 0) |
| 284 | return rsp->scsi_status | (cmd_status[err].result << 16); |
| 285 | return rsp->scsi_status | (DID_ERROR << 16); |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * ibmvfc_retry_cmd - Determine if error status is retryable |
| 290 | * @status: status / error class |
| 291 | * @error: error |
| 292 | * |
| 293 | * Return value: |
| 294 | * 1 if error should be retried / 0 if it should not |
| 295 | **/ |
| 296 | static int ibmvfc_retry_cmd(u16 status, u16 error) |
| 297 | { |
| 298 | int rc = ibmvfc_get_err_index(status, error); |
| 299 | |
| 300 | if (rc >= 0) |
| 301 | return cmd_status[rc].retry; |
| 302 | return 1; |
| 303 | } |
| 304 | |
| 305 | static const char *unknown_fc_explain = "unknown fc explain"; |
| 306 | |
| 307 | static const struct { |
| 308 | u16 fc_explain; |
| 309 | char *name; |
| 310 | } ls_explain [] = { |
| 311 | { 0x00, "no additional explanation" }, |
| 312 | { 0x01, "service parameter error - options" }, |
| 313 | { 0x03, "service parameter error - initiator control" }, |
| 314 | { 0x05, "service parameter error - recipient control" }, |
| 315 | { 0x07, "service parameter error - received data field size" }, |
| 316 | { 0x09, "service parameter error - concurrent seq" }, |
| 317 | { 0x0B, "service parameter error - credit" }, |
| 318 | { 0x0D, "invalid N_Port/F_Port_Name" }, |
| 319 | { 0x0E, "invalid node/Fabric Name" }, |
| 320 | { 0x0F, "invalid common service parameters" }, |
| 321 | { 0x11, "invalid association header" }, |
| 322 | { 0x13, "association header required" }, |
| 323 | { 0x15, "invalid originator S_ID" }, |
| 324 | { 0x17, "invalid OX_ID-RX-ID combination" }, |
| 325 | { 0x19, "command (request) already in progress" }, |
| 326 | { 0x1E, "N_Port Login requested" }, |
| 327 | { 0x1F, "Invalid N_Port_ID" }, |
| 328 | }; |
| 329 | |
| 330 | static const struct { |
| 331 | u16 fc_explain; |
| 332 | char *name; |
| 333 | } gs_explain [] = { |
| 334 | { 0x00, "no additional explanation" }, |
| 335 | { 0x01, "port identifier not registered" }, |
| 336 | { 0x02, "port name not registered" }, |
| 337 | { 0x03, "node name not registered" }, |
| 338 | { 0x04, "class of service not registered" }, |
| 339 | { 0x06, "initial process associator not registered" }, |
| 340 | { 0x07, "FC-4 TYPEs not registered" }, |
| 341 | { 0x08, "symbolic port name not registered" }, |
| 342 | { 0x09, "symbolic node name not registered" }, |
| 343 | { 0x0A, "port type not registered" }, |
| 344 | { 0xF0, "authorization exception" }, |
| 345 | { 0xF1, "authentication exception" }, |
| 346 | { 0xF2, "data base full" }, |
| 347 | { 0xF3, "data base empty" }, |
| 348 | { 0xF4, "processing request" }, |
| 349 | { 0xF5, "unable to verify connection" }, |
| 350 | { 0xF6, "devices not in a common zone" }, |
| 351 | }; |
| 352 | |
| 353 | /** |
| 354 | * ibmvfc_get_ls_explain - Return the FC Explain description text |
| 355 | * @status: FC Explain status |
| 356 | * |
| 357 | * Returns: |
| 358 | * error string |
| 359 | **/ |
| 360 | static const char *ibmvfc_get_ls_explain(u16 status) |
| 361 | { |
| 362 | int i; |
| 363 | |
| 364 | for (i = 0; i < ARRAY_SIZE(ls_explain); i++) |
| 365 | if (ls_explain[i].fc_explain == status) |
| 366 | return ls_explain[i].name; |
| 367 | |
| 368 | return unknown_fc_explain; |
| 369 | } |
| 370 | |
| 371 | /** |
| 372 | * ibmvfc_get_gs_explain - Return the FC Explain description text |
| 373 | * @status: FC Explain status |
| 374 | * |
| 375 | * Returns: |
| 376 | * error string |
| 377 | **/ |
| 378 | static const char *ibmvfc_get_gs_explain(u16 status) |
| 379 | { |
| 380 | int i; |
| 381 | |
| 382 | for (i = 0; i < ARRAY_SIZE(gs_explain); i++) |
| 383 | if (gs_explain[i].fc_explain == status) |
| 384 | return gs_explain[i].name; |
| 385 | |
| 386 | return unknown_fc_explain; |
| 387 | } |
| 388 | |
| 389 | static const struct { |
| 390 | enum ibmvfc_fc_type fc_type; |
| 391 | char *name; |
| 392 | } fc_type [] = { |
| 393 | { IBMVFC_FABRIC_REJECT, "fabric reject" }, |
| 394 | { IBMVFC_PORT_REJECT, "port reject" }, |
| 395 | { IBMVFC_LS_REJECT, "ELS reject" }, |
| 396 | { IBMVFC_FABRIC_BUSY, "fabric busy" }, |
| 397 | { IBMVFC_PORT_BUSY, "port busy" }, |
| 398 | { IBMVFC_BASIC_REJECT, "basic reject" }, |
| 399 | }; |
| 400 | |
| 401 | static const char *unknown_fc_type = "unknown fc type"; |
| 402 | |
| 403 | /** |
| 404 | * ibmvfc_get_fc_type - Return the FC Type description text |
| 405 | * @status: FC Type error status |
| 406 | * |
| 407 | * Returns: |
| 408 | * error string |
| 409 | **/ |
| 410 | static const char *ibmvfc_get_fc_type(u16 status) |
| 411 | { |
| 412 | int i; |
| 413 | |
| 414 | for (i = 0; i < ARRAY_SIZE(fc_type); i++) |
| 415 | if (fc_type[i].fc_type == status) |
| 416 | return fc_type[i].name; |
| 417 | |
| 418 | return unknown_fc_type; |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * ibmvfc_set_tgt_action - Set the next init action for the target |
| 423 | * @tgt: ibmvfc target struct |
| 424 | * @action: action to perform |
| 425 | * |
| 426 | **/ |
| 427 | static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, |
| 428 | enum ibmvfc_target_action action) |
| 429 | { |
| 430 | switch (tgt->action) { |
| 431 | case IBMVFC_TGT_ACTION_DEL_RPORT: |
| 432 | break; |
| 433 | default: |
| 434 | tgt->action = action; |
| 435 | break; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | /** |
| 440 | * ibmvfc_set_host_state - Set the state for the host |
| 441 | * @vhost: ibmvfc host struct |
| 442 | * @state: state to set host to |
| 443 | * |
| 444 | * Returns: |
| 445 | * 0 if state changed / non-zero if not changed |
| 446 | **/ |
| 447 | static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, |
| 448 | enum ibmvfc_host_state state) |
| 449 | { |
| 450 | int rc = 0; |
| 451 | |
| 452 | switch (vhost->state) { |
| 453 | case IBMVFC_HOST_OFFLINE: |
| 454 | rc = -EINVAL; |
| 455 | break; |
| 456 | default: |
| 457 | vhost->state = state; |
| 458 | break; |
| 459 | }; |
| 460 | |
| 461 | return rc; |
| 462 | } |
| 463 | |
| 464 | /** |
| 465 | * ibmvfc_set_host_action - Set the next init action for the host |
| 466 | * @vhost: ibmvfc host struct |
| 467 | * @action: action to perform |
| 468 | * |
| 469 | **/ |
| 470 | static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, |
| 471 | enum ibmvfc_host_action action) |
| 472 | { |
| 473 | switch (action) { |
| 474 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 475 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) |
| 476 | vhost->action = action; |
| 477 | break; |
| 478 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 479 | if (vhost->action == IBMVFC_HOST_ACTION_INIT) |
| 480 | vhost->action = action; |
| 481 | break; |
| 482 | case IBMVFC_HOST_ACTION_QUERY: |
| 483 | switch (vhost->action) { |
| 484 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 485 | case IBMVFC_HOST_ACTION_NONE: |
| 486 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 487 | vhost->action = action; |
| 488 | break; |
| 489 | default: |
| 490 | break; |
| 491 | }; |
| 492 | break; |
| 493 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 494 | if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) |
| 495 | vhost->action = action; |
| 496 | break; |
| 497 | case IBMVFC_HOST_ACTION_INIT: |
| 498 | case IBMVFC_HOST_ACTION_TGT_DEL: |
| 499 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 500 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 501 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 502 | case IBMVFC_HOST_ACTION_NONE: |
| 503 | default: |
| 504 | vhost->action = action; |
| 505 | break; |
| 506 | }; |
| 507 | } |
| 508 | |
| 509 | /** |
| 510 | * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) |
| 511 | * @vhost: ibmvfc host struct |
| 512 | * |
| 513 | * Return value: |
| 514 | * nothing |
| 515 | **/ |
| 516 | static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) |
| 517 | { |
| 518 | if (vhost->action == IBMVFC_HOST_ACTION_NONE) { |
Brian King | 2d0da2a | 2008-07-22 08:31:42 -0500 | [diff] [blame] | 519 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| 520 | scsi_block_requests(vhost->host); |
| 521 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 522 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 523 | } else |
| 524 | vhost->reinit = 1; |
| 525 | |
| 526 | wake_up(&vhost->work_wait_q); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * ibmvfc_link_down - Handle a link down event from the adapter |
| 531 | * @vhost: ibmvfc host struct |
| 532 | * @state: ibmvfc host state to enter |
| 533 | * |
| 534 | **/ |
| 535 | static void ibmvfc_link_down(struct ibmvfc_host *vhost, |
| 536 | enum ibmvfc_host_state state) |
| 537 | { |
| 538 | struct ibmvfc_target *tgt; |
| 539 | |
| 540 | ENTER; |
| 541 | scsi_block_requests(vhost->host); |
| 542 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 543 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 544 | ibmvfc_set_host_state(vhost, state); |
| 545 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| 546 | vhost->events_to_log |= IBMVFC_AE_LINKDOWN; |
| 547 | wake_up(&vhost->work_wait_q); |
| 548 | LEAVE; |
| 549 | } |
| 550 | |
| 551 | /** |
| 552 | * ibmvfc_init_host - Start host initialization |
| 553 | * @vhost: ibmvfc host struct |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 554 | * @relogin: is this a re-login? |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 555 | * |
| 556 | * Return value: |
| 557 | * nothing |
| 558 | **/ |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 559 | static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 560 | { |
| 561 | struct ibmvfc_target *tgt; |
| 562 | |
| 563 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
Brian King | 1c41fa82 | 2008-12-03 11:02:54 -0600 | [diff] [blame] | 564 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 565 | dev_err(vhost->dev, |
| 566 | "Host initialization retries exceeded. Taking adapter offline\n"); |
| 567 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 568 | return; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 573 | if (!relogin) { |
| 574 | memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
| 575 | vhost->async_crq.cur = 0; |
| 576 | } |
| 577 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 578 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 579 | tgt->need_login = 1; |
| 580 | scsi_block_requests(vhost->host); |
| 581 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 582 | vhost->job_step = ibmvfc_npiv_login; |
| 583 | wake_up(&vhost->work_wait_q); |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | /** |
| 588 | * ibmvfc_send_crq - Send a CRQ |
| 589 | * @vhost: ibmvfc host struct |
| 590 | * @word1: the first 64 bits of the data |
| 591 | * @word2: the second 64 bits of the data |
| 592 | * |
| 593 | * Return value: |
| 594 | * 0 on success / other on failure |
| 595 | **/ |
| 596 | static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) |
| 597 | { |
| 598 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 599 | return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); |
| 600 | } |
| 601 | |
| 602 | /** |
| 603 | * ibmvfc_send_crq_init - Send a CRQ init message |
| 604 | * @vhost: ibmvfc host struct |
| 605 | * |
| 606 | * Return value: |
| 607 | * 0 on success / other on failure |
| 608 | **/ |
| 609 | static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) |
| 610 | { |
| 611 | ibmvfc_dbg(vhost, "Sending CRQ init\n"); |
| 612 | return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); |
| 613 | } |
| 614 | |
| 615 | /** |
| 616 | * ibmvfc_send_crq_init_complete - Send a CRQ init complete message |
| 617 | * @vhost: ibmvfc host struct |
| 618 | * |
| 619 | * Return value: |
| 620 | * 0 on success / other on failure |
| 621 | **/ |
| 622 | static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) |
| 623 | { |
| 624 | ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); |
| 625 | return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); |
| 626 | } |
| 627 | |
| 628 | /** |
| 629 | * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ |
| 630 | * @vhost: ibmvfc host struct |
| 631 | * |
| 632 | * Frees irq, deallocates a page for messages, unmaps dma, and unregisters |
| 633 | * the crq with the hypervisor. |
| 634 | **/ |
| 635 | static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) |
| 636 | { |
| 637 | long rc; |
| 638 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 639 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 640 | |
| 641 | ibmvfc_dbg(vhost, "Releasing CRQ\n"); |
| 642 | free_irq(vdev->irq, vhost); |
| 643 | do { |
| 644 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 645 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 646 | |
| 647 | vhost->state = IBMVFC_NO_CRQ; |
| 648 | dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 649 | free_page((unsigned long)crq->msgs); |
| 650 | } |
| 651 | |
| 652 | /** |
| 653 | * ibmvfc_reenable_crq_queue - reenables the CRQ |
| 654 | * @vhost: ibmvfc host struct |
| 655 | * |
| 656 | * Return value: |
| 657 | * 0 on success / other on failure |
| 658 | **/ |
| 659 | static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) |
| 660 | { |
| 661 | int rc; |
| 662 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 663 | |
| 664 | /* Re-enable the CRQ */ |
| 665 | do { |
| 666 | rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
| 667 | } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 668 | |
| 669 | if (rc) |
| 670 | dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); |
| 671 | |
| 672 | return rc; |
| 673 | } |
| 674 | |
| 675 | /** |
| 676 | * ibmvfc_reset_crq - resets a crq after a failure |
| 677 | * @vhost: ibmvfc host struct |
| 678 | * |
| 679 | * Return value: |
| 680 | * 0 on success / other on failure |
| 681 | **/ |
| 682 | static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) |
| 683 | { |
| 684 | int rc; |
| 685 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 686 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 687 | |
| 688 | /* Close the CRQ */ |
| 689 | do { |
| 690 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 691 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 692 | |
| 693 | vhost->state = IBMVFC_NO_CRQ; |
| 694 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 695 | |
| 696 | /* Clean out the queue */ |
| 697 | memset(crq->msgs, 0, PAGE_SIZE); |
| 698 | crq->cur = 0; |
| 699 | |
| 700 | /* And re-open it again */ |
| 701 | rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| 702 | crq->msg_token, PAGE_SIZE); |
| 703 | |
| 704 | if (rc == H_CLOSED) |
| 705 | /* Adapter is good, but other end is not ready */ |
| 706 | dev_warn(vhost->dev, "Partner adapter not ready\n"); |
| 707 | else if (rc != 0) |
| 708 | dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); |
| 709 | |
| 710 | return rc; |
| 711 | } |
| 712 | |
| 713 | /** |
| 714 | * ibmvfc_valid_event - Determines if event is valid. |
| 715 | * @pool: event_pool that contains the event |
| 716 | * @evt: ibmvfc event to be checked for validity |
| 717 | * |
| 718 | * Return value: |
| 719 | * 1 if event is valid / 0 if event is not valid |
| 720 | **/ |
| 721 | static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, |
| 722 | struct ibmvfc_event *evt) |
| 723 | { |
| 724 | int index = evt - pool->events; |
| 725 | if (index < 0 || index >= pool->size) /* outside of bounds */ |
| 726 | return 0; |
| 727 | if (evt != pool->events + index) /* unaligned */ |
| 728 | return 0; |
| 729 | return 1; |
| 730 | } |
| 731 | |
| 732 | /** |
| 733 | * ibmvfc_free_event - Free the specified event |
| 734 | * @evt: ibmvfc_event to be freed |
| 735 | * |
| 736 | **/ |
| 737 | static void ibmvfc_free_event(struct ibmvfc_event *evt) |
| 738 | { |
| 739 | struct ibmvfc_host *vhost = evt->vhost; |
| 740 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 741 | |
| 742 | BUG_ON(!ibmvfc_valid_event(pool, evt)); |
| 743 | BUG_ON(atomic_inc_return(&evt->free) != 1); |
| 744 | list_add_tail(&evt->queue, &vhost->free); |
| 745 | } |
| 746 | |
| 747 | /** |
| 748 | * ibmvfc_scsi_eh_done - EH done function for queuecommand commands |
| 749 | * @evt: ibmvfc event struct |
| 750 | * |
| 751 | * This function does not setup any error status, that must be done |
| 752 | * before this function gets called. |
| 753 | **/ |
| 754 | static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) |
| 755 | { |
| 756 | struct scsi_cmnd *cmnd = evt->cmnd; |
| 757 | |
| 758 | if (cmnd) { |
| 759 | scsi_dma_unmap(cmnd); |
| 760 | cmnd->scsi_done(cmnd); |
| 761 | } |
| 762 | |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 763 | if (evt->eh_comp) |
| 764 | complete(evt->eh_comp); |
| 765 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 766 | ibmvfc_free_event(evt); |
| 767 | } |
| 768 | |
| 769 | /** |
| 770 | * ibmvfc_fail_request - Fail request with specified error code |
| 771 | * @evt: ibmvfc event struct |
| 772 | * @error_code: error code to fail request with |
| 773 | * |
| 774 | * Return value: |
| 775 | * none |
| 776 | **/ |
| 777 | static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) |
| 778 | { |
| 779 | if (evt->cmnd) { |
| 780 | evt->cmnd->result = (error_code << 16); |
| 781 | evt->done = ibmvfc_scsi_eh_done; |
| 782 | } else |
| 783 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; |
| 784 | |
| 785 | list_del(&evt->queue); |
| 786 | del_timer(&evt->timer); |
| 787 | ibmvfc_trc_end(evt); |
| 788 | evt->done(evt); |
| 789 | } |
| 790 | |
| 791 | /** |
| 792 | * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests |
| 793 | * @vhost: ibmvfc host struct |
| 794 | * @error_code: error code to fail requests with |
| 795 | * |
| 796 | * Return value: |
| 797 | * none |
| 798 | **/ |
| 799 | static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) |
| 800 | { |
| 801 | struct ibmvfc_event *evt, *pos; |
| 802 | |
| 803 | ibmvfc_dbg(vhost, "Purging all requests\n"); |
| 804 | list_for_each_entry_safe(evt, pos, &vhost->sent, queue) |
| 805 | ibmvfc_fail_request(evt, error_code); |
| 806 | } |
| 807 | |
| 808 | /** |
| 809 | * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
| 810 | * @vhost: struct ibmvfc host to reset |
| 811 | **/ |
| 812 | static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| 813 | { |
| 814 | int rc; |
| 815 | |
| 816 | scsi_block_requests(vhost->host); |
| 817 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 818 | if ((rc = ibmvfc_reset_crq(vhost)) || |
| 819 | (rc = ibmvfc_send_crq_init(vhost)) || |
| 820 | (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { |
| 821 | dev_err(vhost->dev, "Error after reset rc=%d\n", rc); |
| 822 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 823 | } else |
| 824 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 825 | } |
| 826 | |
| 827 | /** |
| 828 | * ibmvfc_reset_host - Reset the connection to the server |
| 829 | * @vhost: struct ibmvfc host to reset |
| 830 | **/ |
| 831 | static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| 832 | { |
| 833 | unsigned long flags; |
| 834 | |
| 835 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 836 | __ibmvfc_reset_host(vhost); |
| 837 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 838 | } |
| 839 | |
| 840 | /** |
| 841 | * ibmvfc_retry_host_init - Retry host initialization if allowed |
| 842 | * @vhost: ibmvfc host struct |
| 843 | * |
| 844 | **/ |
| 845 | static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
| 846 | { |
| 847 | if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
Brian King | 1c41fa82 | 2008-12-03 11:02:54 -0600 | [diff] [blame] | 848 | vhost->delay_init = 1; |
| 849 | if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 850 | dev_err(vhost->dev, |
| 851 | "Host initialization retries exceeded. Taking adapter offline\n"); |
| 852 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
Brian King | 1c41fa82 | 2008-12-03 11:02:54 -0600 | [diff] [blame] | 853 | } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 854 | __ibmvfc_reset_host(vhost); |
| 855 | else |
| 856 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 857 | } |
| 858 | |
| 859 | wake_up(&vhost->work_wait_q); |
| 860 | } |
| 861 | |
| 862 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 863 | * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 864 | * @starget: scsi target struct |
| 865 | * |
| 866 | * Return value: |
| 867 | * ibmvfc_target struct / NULL if not found |
| 868 | **/ |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 869 | static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 870 | { |
| 871 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 872 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 873 | struct ibmvfc_target *tgt; |
| 874 | |
| 875 | list_for_each_entry(tgt, &vhost->targets, queue) |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 876 | if (tgt->target_id == starget->id) { |
| 877 | kref_get(&tgt->kref); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 878 | return tgt; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 879 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 880 | return NULL; |
| 881 | } |
| 882 | |
| 883 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 884 | * ibmvfc_get_target - Find the specified scsi_target |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 885 | * @starget: scsi target struct |
| 886 | * |
| 887 | * Return value: |
| 888 | * ibmvfc_target struct / NULL if not found |
| 889 | **/ |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 890 | static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 891 | { |
| 892 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 893 | struct ibmvfc_target *tgt; |
| 894 | unsigned long flags; |
| 895 | |
| 896 | spin_lock_irqsave(shost->host_lock, flags); |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 897 | tgt = __ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 898 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 899 | return tgt; |
| 900 | } |
| 901 | |
| 902 | /** |
| 903 | * ibmvfc_get_host_speed - Get host port speed |
| 904 | * @shost: scsi host struct |
| 905 | * |
| 906 | * Return value: |
| 907 | * none |
| 908 | **/ |
| 909 | static void ibmvfc_get_host_speed(struct Scsi_Host *shost) |
| 910 | { |
| 911 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 912 | unsigned long flags; |
| 913 | |
| 914 | spin_lock_irqsave(shost->host_lock, flags); |
| 915 | if (vhost->state == IBMVFC_ACTIVE) { |
| 916 | switch (vhost->login_buf->resp.link_speed / 100) { |
| 917 | case 1: |
| 918 | fc_host_speed(shost) = FC_PORTSPEED_1GBIT; |
| 919 | break; |
| 920 | case 2: |
| 921 | fc_host_speed(shost) = FC_PORTSPEED_2GBIT; |
| 922 | break; |
| 923 | case 4: |
| 924 | fc_host_speed(shost) = FC_PORTSPEED_4GBIT; |
| 925 | break; |
| 926 | case 8: |
| 927 | fc_host_speed(shost) = FC_PORTSPEED_8GBIT; |
| 928 | break; |
| 929 | case 10: |
| 930 | fc_host_speed(shost) = FC_PORTSPEED_10GBIT; |
| 931 | break; |
| 932 | case 16: |
| 933 | fc_host_speed(shost) = FC_PORTSPEED_16GBIT; |
| 934 | break; |
| 935 | default: |
Stephen Rothwell | 775a42e | 2009-01-06 14:59:00 +0000 | [diff] [blame] | 936 | ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 937 | vhost->login_buf->resp.link_speed / 100); |
| 938 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| 939 | break; |
| 940 | } |
| 941 | } else |
| 942 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| 943 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 944 | } |
| 945 | |
| 946 | /** |
| 947 | * ibmvfc_get_host_port_state - Get host port state |
| 948 | * @shost: scsi host struct |
| 949 | * |
| 950 | * Return value: |
| 951 | * none |
| 952 | **/ |
| 953 | static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) |
| 954 | { |
| 955 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 956 | unsigned long flags; |
| 957 | |
| 958 | spin_lock_irqsave(shost->host_lock, flags); |
| 959 | switch (vhost->state) { |
| 960 | case IBMVFC_INITIALIZING: |
| 961 | case IBMVFC_ACTIVE: |
| 962 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
| 963 | break; |
| 964 | case IBMVFC_LINK_DOWN: |
| 965 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
| 966 | break; |
| 967 | case IBMVFC_LINK_DEAD: |
| 968 | case IBMVFC_HOST_OFFLINE: |
| 969 | fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; |
| 970 | break; |
| 971 | case IBMVFC_HALTED: |
| 972 | fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; |
| 973 | break; |
Brian King | 0ae808e | 2008-07-22 08:31:39 -0500 | [diff] [blame] | 974 | case IBMVFC_NO_CRQ: |
| 975 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 976 | break; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 977 | default: |
| 978 | ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); |
| 979 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 980 | break; |
| 981 | } |
| 982 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 983 | } |
| 984 | |
| 985 | /** |
| 986 | * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout |
| 987 | * @rport: rport struct |
| 988 | * @timeout: timeout value |
| 989 | * |
| 990 | * Return value: |
| 991 | * none |
| 992 | **/ |
| 993 | static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
| 994 | { |
| 995 | if (timeout) |
| 996 | rport->dev_loss_tmo = timeout; |
| 997 | else |
| 998 | rport->dev_loss_tmo = 1; |
| 999 | } |
| 1000 | |
| 1001 | /** |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1002 | * ibmvfc_release_tgt - Free memory allocated for a target |
| 1003 | * @kref: kref struct |
| 1004 | * |
| 1005 | **/ |
| 1006 | static void ibmvfc_release_tgt(struct kref *kref) |
| 1007 | { |
| 1008 | struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); |
| 1009 | kfree(tgt); |
| 1010 | } |
| 1011 | |
| 1012 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1013 | * ibmvfc_get_starget_node_name - Get SCSI target's node name |
| 1014 | * @starget: scsi target struct |
| 1015 | * |
| 1016 | * Return value: |
| 1017 | * none |
| 1018 | **/ |
| 1019 | static void ibmvfc_get_starget_node_name(struct scsi_target *starget) |
| 1020 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1021 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1022 | fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1023 | if (tgt) |
| 1024 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1025 | } |
| 1026 | |
| 1027 | /** |
| 1028 | * ibmvfc_get_starget_port_name - Get SCSI target's port name |
| 1029 | * @starget: scsi target struct |
| 1030 | * |
| 1031 | * Return value: |
| 1032 | * none |
| 1033 | **/ |
| 1034 | static void ibmvfc_get_starget_port_name(struct scsi_target *starget) |
| 1035 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1036 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1037 | fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1038 | if (tgt) |
| 1039 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1040 | } |
| 1041 | |
| 1042 | /** |
| 1043 | * ibmvfc_get_starget_port_id - Get SCSI target's port ID |
| 1044 | * @starget: scsi target struct |
| 1045 | * |
| 1046 | * Return value: |
| 1047 | * none |
| 1048 | **/ |
| 1049 | static void ibmvfc_get_starget_port_id(struct scsi_target *starget) |
| 1050 | { |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1051 | struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1052 | fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
Brian King | b3c10489c | 2008-07-22 08:31:41 -0500 | [diff] [blame] | 1053 | if (tgt) |
| 1054 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | /** |
| 1058 | * ibmvfc_wait_while_resetting - Wait while the host resets |
| 1059 | * @vhost: ibmvfc host struct |
| 1060 | * |
| 1061 | * Return value: |
| 1062 | * 0 on success / other on failure |
| 1063 | **/ |
| 1064 | static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) |
| 1065 | { |
| 1066 | long timeout = wait_event_timeout(vhost->init_wait_q, |
Brian King | 3eddc56 | 2008-08-15 10:59:21 -0500 | [diff] [blame] | 1067 | ((vhost->state == IBMVFC_ACTIVE || |
| 1068 | vhost->state == IBMVFC_HOST_OFFLINE || |
| 1069 | vhost->state == IBMVFC_LINK_DEAD) && |
| 1070 | vhost->action == IBMVFC_HOST_ACTION_NONE), |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1071 | (init_timeout * HZ)); |
| 1072 | |
| 1073 | return timeout ? 0 : -EIO; |
| 1074 | } |
| 1075 | |
| 1076 | /** |
| 1077 | * ibmvfc_issue_fc_host_lip - Re-initiate link initialization |
| 1078 | * @shost: scsi host struct |
| 1079 | * |
| 1080 | * Return value: |
| 1081 | * 0 on success / other on failure |
| 1082 | **/ |
| 1083 | static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) |
| 1084 | { |
| 1085 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 1086 | |
| 1087 | dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); |
| 1088 | ibmvfc_reset_host(vhost); |
| 1089 | return ibmvfc_wait_while_resetting(vhost); |
| 1090 | } |
| 1091 | |
| 1092 | /** |
| 1093 | * ibmvfc_gather_partition_info - Gather info about the LPAR |
| 1094 | * |
| 1095 | * Return value: |
| 1096 | * none |
| 1097 | **/ |
| 1098 | static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) |
| 1099 | { |
| 1100 | struct device_node *rootdn; |
| 1101 | const char *name; |
| 1102 | const unsigned int *num; |
| 1103 | |
| 1104 | rootdn = of_find_node_by_path("/"); |
| 1105 | if (!rootdn) |
| 1106 | return; |
| 1107 | |
| 1108 | name = of_get_property(rootdn, "ibm,partition-name", NULL); |
| 1109 | if (name) |
| 1110 | strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); |
| 1111 | num = of_get_property(rootdn, "ibm,partition-no", NULL); |
| 1112 | if (num) |
| 1113 | vhost->partition_number = *num; |
| 1114 | of_node_put(rootdn); |
| 1115 | } |
| 1116 | |
| 1117 | /** |
| 1118 | * ibmvfc_set_login_info - Setup info for NPIV login |
| 1119 | * @vhost: ibmvfc host struct |
| 1120 | * |
| 1121 | * Return value: |
| 1122 | * none |
| 1123 | **/ |
| 1124 | static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) |
| 1125 | { |
| 1126 | struct ibmvfc_npiv_login *login_info = &vhost->login_info; |
| 1127 | struct device_node *of_node = vhost->dev->archdata.of_node; |
| 1128 | const char *location; |
| 1129 | |
| 1130 | memset(login_info, 0, sizeof(*login_info)); |
| 1131 | |
| 1132 | login_info->ostype = IBMVFC_OS_LINUX; |
| 1133 | login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; |
| 1134 | login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); |
| 1135 | login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); |
| 1136 | login_info->partition_num = vhost->partition_number; |
| 1137 | login_info->vfc_frame_version = 1; |
| 1138 | login_info->fcp_version = 3; |
| 1139 | if (vhost->client_migrated) |
| 1140 | login_info->flags = IBMVFC_CLIENT_MIGRATED; |
| 1141 | |
| 1142 | login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| 1143 | login_info->capabilities = IBMVFC_CAN_MIGRATE; |
| 1144 | login_info->async.va = vhost->async_crq.msg_token; |
Brian King | 52d7e86 | 2008-07-22 08:31:46 -0500 | [diff] [blame] | 1145 | 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] | 1146 | strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
| 1147 | strncpy(login_info->device_name, |
Kay Sievers | 71610f5 | 2008-12-03 22:41:36 +0100 | [diff] [blame] | 1148 | dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1149 | |
| 1150 | location = of_get_property(of_node, "ibm,loc-code", NULL); |
Kay Sievers | 71610f5 | 2008-12-03 22:41:36 +0100 | [diff] [blame] | 1151 | location = location ? location : dev_name(vhost->dev); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1152 | strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
| 1153 | } |
| 1154 | |
| 1155 | /** |
| 1156 | * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host |
| 1157 | * @vhost: ibmvfc host who owns the event pool |
| 1158 | * |
| 1159 | * Returns zero on success. |
| 1160 | **/ |
| 1161 | static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) |
| 1162 | { |
| 1163 | int i; |
| 1164 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 1165 | |
| 1166 | ENTER; |
| 1167 | pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| 1168 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); |
| 1169 | if (!pool->events) |
| 1170 | return -ENOMEM; |
| 1171 | |
| 1172 | pool->iu_storage = dma_alloc_coherent(vhost->dev, |
| 1173 | pool->size * sizeof(*pool->iu_storage), |
| 1174 | &pool->iu_token, 0); |
| 1175 | |
| 1176 | if (!pool->iu_storage) { |
| 1177 | kfree(pool->events); |
| 1178 | return -ENOMEM; |
| 1179 | } |
| 1180 | |
| 1181 | for (i = 0; i < pool->size; ++i) { |
| 1182 | struct ibmvfc_event *evt = &pool->events[i]; |
| 1183 | atomic_set(&evt->free, 1); |
| 1184 | evt->crq.valid = 0x80; |
| 1185 | evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); |
| 1186 | evt->xfer_iu = pool->iu_storage + i; |
| 1187 | evt->vhost = vhost; |
| 1188 | evt->ext_list = NULL; |
| 1189 | list_add_tail(&evt->queue, &vhost->free); |
| 1190 | } |
| 1191 | |
| 1192 | LEAVE; |
| 1193 | return 0; |
| 1194 | } |
| 1195 | |
| 1196 | /** |
| 1197 | * ibmvfc_free_event_pool - Frees memory of the event pool of a host |
| 1198 | * @vhost: ibmvfc host who owns the event pool |
| 1199 | * |
| 1200 | **/ |
| 1201 | static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) |
| 1202 | { |
| 1203 | int i; |
| 1204 | struct ibmvfc_event_pool *pool = &vhost->pool; |
| 1205 | |
| 1206 | ENTER; |
| 1207 | for (i = 0; i < pool->size; ++i) { |
| 1208 | list_del(&pool->events[i].queue); |
| 1209 | BUG_ON(atomic_read(&pool->events[i].free) != 1); |
| 1210 | if (pool->events[i].ext_list) |
| 1211 | dma_pool_free(vhost->sg_pool, |
| 1212 | pool->events[i].ext_list, |
| 1213 | pool->events[i].ext_list_token); |
| 1214 | } |
| 1215 | |
| 1216 | kfree(pool->events); |
| 1217 | dma_free_coherent(vhost->dev, |
| 1218 | pool->size * sizeof(*pool->iu_storage), |
| 1219 | pool->iu_storage, pool->iu_token); |
| 1220 | LEAVE; |
| 1221 | } |
| 1222 | |
| 1223 | /** |
| 1224 | * ibmvfc_get_event - Gets the next free event in pool |
| 1225 | * @vhost: ibmvfc host struct |
| 1226 | * |
| 1227 | * Returns a free event from the pool. |
| 1228 | **/ |
| 1229 | static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) |
| 1230 | { |
| 1231 | struct ibmvfc_event *evt; |
| 1232 | |
| 1233 | BUG_ON(list_empty(&vhost->free)); |
| 1234 | evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); |
| 1235 | atomic_set(&evt->free, 0); |
| 1236 | list_del(&evt->queue); |
| 1237 | return evt; |
| 1238 | } |
| 1239 | |
| 1240 | /** |
| 1241 | * ibmvfc_init_event - Initialize fields in an event struct that are always |
| 1242 | * required. |
| 1243 | * @evt: The event |
| 1244 | * @done: Routine to call when the event is responded to |
| 1245 | * @format: SRP or MAD format |
| 1246 | **/ |
| 1247 | static void ibmvfc_init_event(struct ibmvfc_event *evt, |
| 1248 | void (*done) (struct ibmvfc_event *), u8 format) |
| 1249 | { |
| 1250 | evt->cmnd = NULL; |
| 1251 | evt->sync_iu = NULL; |
| 1252 | evt->crq.format = format; |
| 1253 | evt->done = done; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1254 | evt->eh_comp = NULL; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | /** |
| 1258 | * ibmvfc_map_sg_list - Initialize scatterlist |
| 1259 | * @scmd: scsi command struct |
| 1260 | * @nseg: number of scatterlist segments |
| 1261 | * @md: memory descriptor list to initialize |
| 1262 | **/ |
| 1263 | static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, |
| 1264 | struct srp_direct_buf *md) |
| 1265 | { |
| 1266 | int i; |
| 1267 | struct scatterlist *sg; |
| 1268 | |
| 1269 | scsi_for_each_sg(scmd, sg, nseg, i) { |
| 1270 | md[i].va = sg_dma_address(sg); |
| 1271 | md[i].len = sg_dma_len(sg); |
| 1272 | md[i].key = 0; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | /** |
| 1277 | * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields |
| 1278 | * @scmd: Scsi_Cmnd with the scatterlist |
| 1279 | * @evt: ibmvfc event struct |
| 1280 | * @vfc_cmd: vfc_cmd that contains the memory descriptor |
| 1281 | * @dev: device for which to map dma memory |
| 1282 | * |
| 1283 | * Returns: |
| 1284 | * 0 on success / non-zero on failure |
| 1285 | **/ |
| 1286 | static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, |
| 1287 | struct ibmvfc_event *evt, |
| 1288 | struct ibmvfc_cmd *vfc_cmd, struct device *dev) |
| 1289 | { |
| 1290 | |
| 1291 | int sg_mapped; |
| 1292 | struct srp_direct_buf *data = &vfc_cmd->ioba; |
| 1293 | struct ibmvfc_host *vhost = dev_get_drvdata(dev); |
| 1294 | |
| 1295 | sg_mapped = scsi_dma_map(scmd); |
| 1296 | if (!sg_mapped) { |
| 1297 | vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; |
| 1298 | return 0; |
| 1299 | } else if (unlikely(sg_mapped < 0)) { |
| 1300 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1301 | scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); |
| 1302 | return sg_mapped; |
| 1303 | } |
| 1304 | |
| 1305 | if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
| 1306 | vfc_cmd->flags |= IBMVFC_WRITE; |
| 1307 | vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; |
| 1308 | } else { |
| 1309 | vfc_cmd->flags |= IBMVFC_READ; |
| 1310 | vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; |
| 1311 | } |
| 1312 | |
| 1313 | if (sg_mapped == 1) { |
| 1314 | ibmvfc_map_sg_list(scmd, sg_mapped, data); |
| 1315 | return 0; |
| 1316 | } |
| 1317 | |
| 1318 | vfc_cmd->flags |= IBMVFC_SCATTERLIST; |
| 1319 | |
| 1320 | if (!evt->ext_list) { |
| 1321 | evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, |
| 1322 | &evt->ext_list_token); |
| 1323 | |
| 1324 | if (!evt->ext_list) { |
Brian King | 64b840d | 2009-01-22 15:45:38 -0600 | [diff] [blame] | 1325 | scsi_dma_unmap(scmd); |
| 1326 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1327 | scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1328 | return -ENOMEM; |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); |
| 1333 | |
| 1334 | data->va = evt->ext_list_token; |
| 1335 | data->len = sg_mapped * sizeof(struct srp_direct_buf); |
| 1336 | data->key = 0; |
| 1337 | return 0; |
| 1338 | } |
| 1339 | |
| 1340 | /** |
| 1341 | * ibmvfc_timeout - Internal command timeout handler |
| 1342 | * @evt: struct ibmvfc_event that timed out |
| 1343 | * |
| 1344 | * Called when an internally generated command times out |
| 1345 | **/ |
| 1346 | static void ibmvfc_timeout(struct ibmvfc_event *evt) |
| 1347 | { |
| 1348 | struct ibmvfc_host *vhost = evt->vhost; |
| 1349 | dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); |
| 1350 | ibmvfc_reset_host(vhost); |
| 1351 | } |
| 1352 | |
| 1353 | /** |
| 1354 | * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() |
| 1355 | * @evt: event to be sent |
| 1356 | * @vhost: ibmvfc host struct |
| 1357 | * @timeout: timeout in seconds - 0 means do not time command |
| 1358 | * |
| 1359 | * Returns the value returned from ibmvfc_send_crq(). (Zero for success) |
| 1360 | **/ |
| 1361 | static int ibmvfc_send_event(struct ibmvfc_event *evt, |
| 1362 | struct ibmvfc_host *vhost, unsigned long timeout) |
| 1363 | { |
| 1364 | u64 *crq_as_u64 = (u64 *) &evt->crq; |
| 1365 | int rc; |
| 1366 | |
| 1367 | /* Copy the IU into the transfer area */ |
| 1368 | *evt->xfer_iu = evt->iu; |
| 1369 | if (evt->crq.format == IBMVFC_CMD_FORMAT) |
| 1370 | evt->xfer_iu->cmd.tag = (u64)evt; |
| 1371 | else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
| 1372 | evt->xfer_iu->mad_common.tag = (u64)evt; |
| 1373 | else |
| 1374 | BUG(); |
| 1375 | |
| 1376 | list_add_tail(&evt->queue, &vhost->sent); |
| 1377 | init_timer(&evt->timer); |
| 1378 | |
| 1379 | if (timeout) { |
| 1380 | evt->timer.data = (unsigned long) evt; |
| 1381 | evt->timer.expires = jiffies + (timeout * HZ); |
| 1382 | evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; |
| 1383 | add_timer(&evt->timer); |
| 1384 | } |
| 1385 | |
Brian King | a528ab7 | 2008-12-03 11:02:56 -0600 | [diff] [blame] | 1386 | mb(); |
| 1387 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1388 | if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { |
| 1389 | list_del(&evt->queue); |
| 1390 | del_timer(&evt->timer); |
| 1391 | |
| 1392 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. |
| 1393 | * Firmware will send a CRQ with a transport event (0xFF) to |
| 1394 | * tell this client what has happened to the transport. This |
| 1395 | * will be handled in ibmvfc_handle_crq() |
| 1396 | */ |
| 1397 | if (rc == H_CLOSED) { |
| 1398 | if (printk_ratelimit()) |
| 1399 | dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); |
| 1400 | if (evt->cmnd) |
| 1401 | scsi_dma_unmap(evt->cmnd); |
| 1402 | ibmvfc_free_event(evt); |
| 1403 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1404 | } |
| 1405 | |
| 1406 | dev_err(vhost->dev, "Send error (rc=%d)\n", rc); |
| 1407 | if (evt->cmnd) { |
| 1408 | evt->cmnd->result = DID_ERROR << 16; |
| 1409 | evt->done = ibmvfc_scsi_eh_done; |
| 1410 | } else |
| 1411 | evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; |
| 1412 | |
| 1413 | evt->done(evt); |
| 1414 | } else |
| 1415 | ibmvfc_trc_start(evt); |
| 1416 | |
| 1417 | return 0; |
| 1418 | } |
| 1419 | |
| 1420 | /** |
| 1421 | * ibmvfc_log_error - Log an error for the failed command if appropriate |
| 1422 | * @evt: ibmvfc event to log |
| 1423 | * |
| 1424 | **/ |
| 1425 | static void ibmvfc_log_error(struct ibmvfc_event *evt) |
| 1426 | { |
| 1427 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 1428 | struct ibmvfc_host *vhost = evt->vhost; |
| 1429 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 1430 | struct scsi_cmnd *cmnd = evt->cmnd; |
| 1431 | const char *err = unknown_error; |
| 1432 | int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| 1433 | int logerr = 0; |
| 1434 | int rsp_code = 0; |
| 1435 | |
| 1436 | if (index >= 0) { |
| 1437 | logerr = cmd_status[index].log; |
| 1438 | err = cmd_status[index].name; |
| 1439 | } |
| 1440 | |
Brian King | 0ae808e | 2008-07-22 08:31:39 -0500 | [diff] [blame] | 1441 | if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1442 | return; |
| 1443 | |
| 1444 | if (rsp->flags & FCP_RSP_LEN_VALID) |
| 1445 | rsp_code = rsp->data.info.rsp_code; |
| 1446 | |
| 1447 | scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " |
| 1448 | "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", |
| 1449 | cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, |
| 1450 | rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); |
| 1451 | } |
| 1452 | |
| 1453 | /** |
| 1454 | * ibmvfc_scsi_done - Handle responses from commands |
| 1455 | * @evt: ibmvfc event to be handled |
| 1456 | * |
| 1457 | * Used as a callback when sending scsi cmds. |
| 1458 | **/ |
| 1459 | static void ibmvfc_scsi_done(struct ibmvfc_event *evt) |
| 1460 | { |
| 1461 | struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| 1462 | struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| 1463 | struct scsi_cmnd *cmnd = evt->cmnd; |
Brian King | 2bac406 | 2008-08-15 10:59:26 -0500 | [diff] [blame] | 1464 | u32 rsp_len = 0; |
| 1465 | u32 sense_len = rsp->fcp_sense_len; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1466 | |
| 1467 | if (cmnd) { |
| 1468 | if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) |
| 1469 | scsi_set_resid(cmnd, vfc_cmd->adapter_resid); |
| 1470 | else if (rsp->flags & FCP_RESID_UNDER) |
| 1471 | scsi_set_resid(cmnd, rsp->fcp_resid); |
| 1472 | else |
| 1473 | scsi_set_resid(cmnd, 0); |
| 1474 | |
| 1475 | if (vfc_cmd->status) { |
| 1476 | cmnd->result = ibmvfc_get_err_result(vfc_cmd); |
| 1477 | |
| 1478 | if (rsp->flags & FCP_RSP_LEN_VALID) |
| 1479 | rsp_len = rsp->fcp_rsp_len; |
| 1480 | if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
| 1481 | sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; |
Brian King | 2bac406 | 2008-08-15 10:59:26 -0500 | [diff] [blame] | 1482 | 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] | 1483 | memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
Brian King | 646d385 | 2008-11-14 13:33:53 -0600 | [diff] [blame] | 1484 | if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) |
| 1485 | ibmvfc_reinit_host(evt->vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1486 | |
Brian King | 50119da | 2008-10-29 08:46:36 -0500 | [diff] [blame] | 1487 | if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) |
| 1488 | cmnd->result = (DID_ERROR << 16); |
| 1489 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1490 | ibmvfc_log_error(evt); |
| 1491 | } |
| 1492 | |
| 1493 | if (!cmnd->result && |
| 1494 | (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) |
| 1495 | cmnd->result = (DID_ERROR << 16); |
| 1496 | |
| 1497 | scsi_dma_unmap(cmnd); |
| 1498 | cmnd->scsi_done(cmnd); |
| 1499 | } |
| 1500 | |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1501 | if (evt->eh_comp) |
| 1502 | complete(evt->eh_comp); |
| 1503 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1504 | ibmvfc_free_event(evt); |
| 1505 | } |
| 1506 | |
| 1507 | /** |
| 1508 | * ibmvfc_host_chkready - Check if the host can accept commands |
| 1509 | * @vhost: struct ibmvfc host |
| 1510 | * |
| 1511 | * Returns: |
| 1512 | * 1 if host can accept command / 0 if not |
| 1513 | **/ |
| 1514 | static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) |
| 1515 | { |
| 1516 | int result = 0; |
| 1517 | |
| 1518 | switch (vhost->state) { |
| 1519 | case IBMVFC_LINK_DEAD: |
| 1520 | case IBMVFC_HOST_OFFLINE: |
| 1521 | result = DID_NO_CONNECT << 16; |
| 1522 | break; |
| 1523 | case IBMVFC_NO_CRQ: |
| 1524 | case IBMVFC_INITIALIZING: |
| 1525 | case IBMVFC_HALTED: |
| 1526 | case IBMVFC_LINK_DOWN: |
| 1527 | result = DID_REQUEUE << 16; |
| 1528 | break; |
| 1529 | case IBMVFC_ACTIVE: |
| 1530 | result = 0; |
| 1531 | break; |
| 1532 | }; |
| 1533 | |
| 1534 | return result; |
| 1535 | } |
| 1536 | |
| 1537 | /** |
| 1538 | * ibmvfc_queuecommand - The queuecommand function of the scsi template |
| 1539 | * @cmnd: struct scsi_cmnd to be executed |
| 1540 | * @done: Callback function to be called when cmnd is completed |
| 1541 | * |
| 1542 | * Returns: |
| 1543 | * 0 on success / other on failure |
| 1544 | **/ |
| 1545 | static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, |
| 1546 | void (*done) (struct scsi_cmnd *)) |
| 1547 | { |
| 1548 | struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); |
| 1549 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| 1550 | struct ibmvfc_cmd *vfc_cmd; |
| 1551 | struct ibmvfc_event *evt; |
| 1552 | u8 tag[2]; |
| 1553 | int rc; |
| 1554 | |
| 1555 | if (unlikely((rc = fc_remote_port_chkready(rport))) || |
| 1556 | unlikely((rc = ibmvfc_host_chkready(vhost)))) { |
| 1557 | cmnd->result = rc; |
| 1558 | done(cmnd); |
| 1559 | return 0; |
| 1560 | } |
| 1561 | |
| 1562 | cmnd->result = (DID_OK << 16); |
| 1563 | evt = ibmvfc_get_event(vhost); |
| 1564 | ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); |
| 1565 | evt->cmnd = cmnd; |
| 1566 | cmnd->scsi_done = done; |
| 1567 | vfc_cmd = &evt->iu.cmd; |
| 1568 | memset(vfc_cmd, 0, sizeof(*vfc_cmd)); |
| 1569 | vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1570 | vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); |
| 1571 | vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1572 | vfc_cmd->payload_len = sizeof(vfc_cmd->iu); |
| 1573 | vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); |
| 1574 | vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; |
| 1575 | vfc_cmd->tgt_scsi_id = rport->port_id; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1576 | vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); |
| 1577 | int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); |
| 1578 | memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); |
| 1579 | |
| 1580 | if (scsi_populate_tag_msg(cmnd, tag)) { |
| 1581 | vfc_cmd->task_tag = tag[1]; |
| 1582 | switch (tag[0]) { |
| 1583 | case MSG_SIMPLE_TAG: |
| 1584 | vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; |
| 1585 | break; |
| 1586 | case MSG_HEAD_TAG: |
| 1587 | vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; |
| 1588 | break; |
| 1589 | case MSG_ORDERED_TAG: |
| 1590 | vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; |
| 1591 | break; |
| 1592 | }; |
| 1593 | } |
| 1594 | |
| 1595 | if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) |
| 1596 | return ibmvfc_send_event(evt, vhost, 0); |
| 1597 | |
| 1598 | ibmvfc_free_event(evt); |
| 1599 | if (rc == -ENOMEM) |
| 1600 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1601 | |
| 1602 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1603 | scmd_printk(KERN_ERR, cmnd, |
| 1604 | "Failed to map DMA buffer for command. rc=%d\n", rc); |
| 1605 | |
| 1606 | cmnd->result = DID_ERROR << 16; |
| 1607 | done(cmnd); |
| 1608 | return 0; |
| 1609 | } |
| 1610 | |
| 1611 | /** |
| 1612 | * ibmvfc_sync_completion - Signal that a synchronous command has completed |
| 1613 | * @evt: ibmvfc event struct |
| 1614 | * |
| 1615 | **/ |
| 1616 | static void ibmvfc_sync_completion(struct ibmvfc_event *evt) |
| 1617 | { |
| 1618 | /* copy the response back */ |
| 1619 | if (evt->sync_iu) |
| 1620 | *evt->sync_iu = *evt->xfer_iu; |
| 1621 | |
| 1622 | complete(&evt->comp); |
| 1623 | } |
| 1624 | |
| 1625 | /** |
| 1626 | * ibmvfc_reset_device - Reset the device with the specified reset type |
| 1627 | * @sdev: scsi device to reset |
| 1628 | * @type: reset type |
| 1629 | * @desc: reset type description for log messages |
| 1630 | * |
| 1631 | * Returns: |
| 1632 | * 0 on success / other on failure |
| 1633 | **/ |
| 1634 | static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) |
| 1635 | { |
| 1636 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1637 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1638 | struct ibmvfc_cmd *tmf; |
Brian King | 50ed9a0 | 2008-10-29 08:46:47 -0500 | [diff] [blame] | 1639 | struct ibmvfc_event *evt = NULL; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1640 | union ibmvfc_iu rsp_iu; |
| 1641 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| 1642 | int rsp_rc = -EBUSY; |
| 1643 | unsigned long flags; |
| 1644 | int rsp_code = 0; |
| 1645 | |
| 1646 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1647 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1648 | evt = ibmvfc_get_event(vhost); |
| 1649 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| 1650 | |
| 1651 | tmf = &evt->iu.cmd; |
| 1652 | memset(tmf, 0, sizeof(*tmf)); |
| 1653 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1654 | tmf->resp.len = sizeof(tmf->rsp); |
| 1655 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1656 | tmf->payload_len = sizeof(tmf->iu); |
| 1657 | tmf->resp_len = sizeof(tmf->rsp); |
| 1658 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1659 | tmf->tgt_scsi_id = rport->port_id; |
| 1660 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| 1661 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| 1662 | tmf->iu.tmf_flags = type; |
| 1663 | evt->sync_iu = &rsp_iu; |
| 1664 | |
| 1665 | init_completion(&evt->comp); |
| 1666 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1667 | } |
| 1668 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1669 | |
| 1670 | if (rsp_rc != 0) { |
| 1671 | sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", |
| 1672 | desc, rsp_rc); |
| 1673 | return -EIO; |
| 1674 | } |
| 1675 | |
| 1676 | sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); |
| 1677 | wait_for_completion(&evt->comp); |
| 1678 | |
| 1679 | if (rsp_iu.cmd.status) { |
| 1680 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| 1681 | rsp_code = fc_rsp->data.info.rsp_code; |
| 1682 | |
| 1683 | sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " |
| 1684 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| 1685 | desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| 1686 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| 1687 | fc_rsp->scsi_status); |
| 1688 | rsp_rc = -EIO; |
| 1689 | } else |
| 1690 | sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); |
| 1691 | |
| 1692 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1693 | ibmvfc_free_event(evt); |
| 1694 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1695 | return rsp_rc; |
| 1696 | } |
| 1697 | |
| 1698 | /** |
| 1699 | * ibmvfc_abort_task_set - Abort outstanding commands to the device |
| 1700 | * @sdev: scsi device to abort commands |
| 1701 | * |
| 1702 | * This sends an Abort Task Set to the VIOS for the specified device. This does |
| 1703 | * NOT send any cancel to the VIOS. That must be done separately. |
| 1704 | * |
| 1705 | * Returns: |
| 1706 | * 0 on success / other on failure |
| 1707 | **/ |
| 1708 | static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
| 1709 | { |
| 1710 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 1711 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 1712 | struct ibmvfc_cmd *tmf; |
| 1713 | struct ibmvfc_event *evt, *found_evt; |
| 1714 | union ibmvfc_iu rsp_iu; |
| 1715 | struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| 1716 | int rsp_rc = -EBUSY; |
| 1717 | unsigned long flags; |
| 1718 | int rsp_code = 0; |
| 1719 | |
| 1720 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1721 | found_evt = NULL; |
| 1722 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1723 | if (evt->cmnd && evt->cmnd->device == sdev) { |
| 1724 | found_evt = evt; |
| 1725 | break; |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | if (!found_evt) { |
| 1730 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1731 | sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); |
| 1732 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1737 | evt = ibmvfc_get_event(vhost); |
| 1738 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| 1739 | |
| 1740 | tmf = &evt->iu.cmd; |
| 1741 | memset(tmf, 0, sizeof(*tmf)); |
| 1742 | tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| 1743 | tmf->resp.len = sizeof(tmf->rsp); |
| 1744 | tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| 1745 | tmf->payload_len = sizeof(tmf->iu); |
| 1746 | tmf->resp_len = sizeof(tmf->rsp); |
| 1747 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
| 1748 | tmf->tgt_scsi_id = rport->port_id; |
| 1749 | int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| 1750 | tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| 1751 | tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; |
| 1752 | evt->sync_iu = &rsp_iu; |
| 1753 | |
| 1754 | init_completion(&evt->comp); |
| 1755 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1756 | } |
| 1757 | |
| 1758 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1759 | |
| 1760 | if (rsp_rc != 0) { |
| 1761 | sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); |
| 1762 | return -EIO; |
| 1763 | } |
| 1764 | |
| 1765 | sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); |
| 1766 | wait_for_completion(&evt->comp); |
| 1767 | |
| 1768 | if (rsp_iu.cmd.status) { |
| 1769 | if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| 1770 | rsp_code = fc_rsp->data.info.rsp_code; |
| 1771 | |
| 1772 | sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " |
| 1773 | "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| 1774 | ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| 1775 | rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| 1776 | fc_rsp->scsi_status); |
| 1777 | rsp_rc = -EIO; |
| 1778 | } else |
| 1779 | sdev_printk(KERN_INFO, sdev, "Abort successful\n"); |
| 1780 | |
| 1781 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1782 | ibmvfc_free_event(evt); |
| 1783 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1784 | return rsp_rc; |
| 1785 | } |
| 1786 | |
| 1787 | /** |
| 1788 | * ibmvfc_cancel_all - Cancel all outstanding commands to the device |
| 1789 | * @sdev: scsi device to cancel commands |
| 1790 | * @type: type of error recovery being performed |
| 1791 | * |
| 1792 | * This sends a cancel to the VIOS for the specified device. This does |
| 1793 | * NOT send any abort to the actual device. That must be done separately. |
| 1794 | * |
| 1795 | * Returns: |
| 1796 | * 0 on success / other on failure |
| 1797 | **/ |
| 1798 | static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) |
| 1799 | { |
| 1800 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1801 | struct scsi_target *starget = scsi_target(sdev); |
| 1802 | struct fc_rport *rport = starget_to_rport(starget); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1803 | struct ibmvfc_tmf *tmf; |
| 1804 | struct ibmvfc_event *evt, *found_evt; |
| 1805 | union ibmvfc_iu rsp; |
| 1806 | int rsp_rc = -EBUSY; |
| 1807 | unsigned long flags; |
| 1808 | u16 status; |
| 1809 | |
| 1810 | ENTER; |
| 1811 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1812 | found_evt = NULL; |
| 1813 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1814 | if (evt->cmnd && evt->cmnd->device == sdev) { |
| 1815 | found_evt = evt; |
| 1816 | break; |
| 1817 | } |
| 1818 | } |
| 1819 | |
| 1820 | if (!found_evt) { |
| 1821 | if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| 1822 | sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); |
| 1823 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1824 | return 0; |
| 1825 | } |
| 1826 | |
| 1827 | if (vhost->state == IBMVFC_ACTIVE) { |
| 1828 | evt = ibmvfc_get_event(vhost); |
| 1829 | ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| 1830 | |
| 1831 | tmf = &evt->iu.tmf; |
| 1832 | memset(tmf, 0, sizeof(*tmf)); |
| 1833 | tmf->common.version = 1; |
| 1834 | tmf->common.opcode = IBMVFC_TMF_MAD; |
| 1835 | tmf->common.length = sizeof(*tmf); |
| 1836 | tmf->scsi_id = rport->port_id; |
| 1837 | int_to_scsilun(sdev->lun, &tmf->lun); |
| 1838 | tmf->flags = (type | IBMVFC_TMF_LUA_VALID); |
| 1839 | tmf->cancel_key = (unsigned long)sdev->hostdata; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1840 | tmf->my_cancel_key = (unsigned long)starget->hostdata; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1841 | |
| 1842 | evt->sync_iu = &rsp; |
| 1843 | init_completion(&evt->comp); |
| 1844 | rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| 1845 | } |
| 1846 | |
| 1847 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1848 | |
| 1849 | if (rsp_rc != 0) { |
| 1850 | sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); |
| 1851 | return -EIO; |
| 1852 | } |
| 1853 | |
| 1854 | sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); |
| 1855 | |
| 1856 | wait_for_completion(&evt->comp); |
| 1857 | status = rsp.mad_common.status; |
| 1858 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1859 | ibmvfc_free_event(evt); |
| 1860 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1861 | |
| 1862 | if (status != IBMVFC_MAD_SUCCESS) { |
| 1863 | sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); |
| 1864 | return -EIO; |
| 1865 | } |
| 1866 | |
| 1867 | sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); |
| 1868 | return 0; |
| 1869 | } |
| 1870 | |
| 1871 | /** |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1872 | * ibmvfc_match_target - Match function for specified target |
| 1873 | * @evt: ibmvfc event struct |
| 1874 | * @device: device to match (starget) |
| 1875 | * |
| 1876 | * Returns: |
| 1877 | * 1 if event matches starget / 0 if event does not match starget |
| 1878 | **/ |
| 1879 | static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) |
| 1880 | { |
| 1881 | if (evt->cmnd && scsi_target(evt->cmnd->device) == device) |
| 1882 | return 1; |
| 1883 | return 0; |
| 1884 | } |
| 1885 | |
| 1886 | /** |
| 1887 | * ibmvfc_match_lun - Match function for specified LUN |
| 1888 | * @evt: ibmvfc event struct |
| 1889 | * @device: device to match (sdev) |
| 1890 | * |
| 1891 | * Returns: |
| 1892 | * 1 if event matches sdev / 0 if event does not match sdev |
| 1893 | **/ |
| 1894 | static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) |
| 1895 | { |
| 1896 | if (evt->cmnd && evt->cmnd->device == device) |
| 1897 | return 1; |
| 1898 | return 0; |
| 1899 | } |
| 1900 | |
| 1901 | /** |
| 1902 | * ibmvfc_wait_for_ops - Wait for ops to complete |
| 1903 | * @vhost: ibmvfc host struct |
| 1904 | * @device: device to match (starget or sdev) |
| 1905 | * @match: match function |
| 1906 | * |
| 1907 | * Returns: |
| 1908 | * SUCCESS / FAILED |
| 1909 | **/ |
| 1910 | static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, |
| 1911 | int (*match) (struct ibmvfc_event *, void *)) |
| 1912 | { |
| 1913 | struct ibmvfc_event *evt; |
| 1914 | DECLARE_COMPLETION_ONSTACK(comp); |
| 1915 | int wait; |
| 1916 | unsigned long flags; |
| 1917 | signed long timeout = init_timeout * HZ; |
| 1918 | |
| 1919 | ENTER; |
| 1920 | do { |
| 1921 | wait = 0; |
| 1922 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1923 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1924 | if (match(evt, device)) { |
| 1925 | evt->eh_comp = ∁ |
| 1926 | wait++; |
| 1927 | } |
| 1928 | } |
| 1929 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1930 | |
| 1931 | if (wait) { |
| 1932 | timeout = wait_for_completion_timeout(&comp, timeout); |
| 1933 | |
| 1934 | if (!timeout) { |
| 1935 | wait = 0; |
| 1936 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 1937 | list_for_each_entry(evt, &vhost->sent, queue) { |
| 1938 | if (match(evt, device)) { |
| 1939 | evt->eh_comp = NULL; |
| 1940 | wait++; |
| 1941 | } |
| 1942 | } |
| 1943 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 1944 | if (wait) |
| 1945 | dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); |
| 1946 | LEAVE; |
| 1947 | return wait ? FAILED : SUCCESS; |
| 1948 | } |
| 1949 | } |
| 1950 | } while (wait); |
| 1951 | |
| 1952 | LEAVE; |
| 1953 | return SUCCESS; |
| 1954 | } |
| 1955 | |
| 1956 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1957 | * ibmvfc_eh_abort_handler - Abort a command |
| 1958 | * @cmd: scsi command to abort |
| 1959 | * |
| 1960 | * Returns: |
| 1961 | * SUCCESS / FAILED |
| 1962 | **/ |
| 1963 | static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) |
| 1964 | { |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1965 | struct scsi_device *sdev = cmd->device; |
| 1966 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1967 | int cancel_rc, abort_rc; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1968 | int rc = FAILED; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1969 | |
| 1970 | ENTER; |
| 1971 | ibmvfc_wait_while_resetting(vhost); |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1972 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); |
| 1973 | abort_rc = ibmvfc_abort_task_set(sdev); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1974 | |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1975 | if (!cancel_rc && !abort_rc) |
| 1976 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1977 | |
| 1978 | LEAVE; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1979 | return rc; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1980 | } |
| 1981 | |
| 1982 | /** |
| 1983 | * ibmvfc_eh_device_reset_handler - Reset a single LUN |
| 1984 | * @cmd: scsi command struct |
| 1985 | * |
| 1986 | * Returns: |
| 1987 | * SUCCESS / FAILED |
| 1988 | **/ |
| 1989 | static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) |
| 1990 | { |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1991 | struct scsi_device *sdev = cmd->device; |
| 1992 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1993 | int cancel_rc, reset_rc; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1994 | int rc = FAILED; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 1995 | |
| 1996 | ENTER; |
| 1997 | ibmvfc_wait_while_resetting(vhost); |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 1998 | cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); |
| 1999 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2000 | |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2001 | if (!cancel_rc && !reset_rc) |
| 2002 | rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2003 | |
| 2004 | LEAVE; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2005 | return rc; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2006 | } |
| 2007 | |
| 2008 | /** |
| 2009 | * ibmvfc_dev_cancel_all - Device iterated cancel all function |
| 2010 | * @sdev: scsi device struct |
| 2011 | * @data: return code |
| 2012 | * |
| 2013 | **/ |
| 2014 | static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) |
| 2015 | { |
| 2016 | unsigned long *rc = data; |
| 2017 | *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); |
| 2018 | } |
| 2019 | |
| 2020 | /** |
| 2021 | * ibmvfc_dev_abort_all - Device iterated abort task set function |
| 2022 | * @sdev: scsi device struct |
| 2023 | * @data: return code |
| 2024 | * |
| 2025 | **/ |
| 2026 | static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) |
| 2027 | { |
| 2028 | unsigned long *rc = data; |
| 2029 | *rc |= ibmvfc_abort_task_set(sdev); |
| 2030 | } |
| 2031 | |
| 2032 | /** |
| 2033 | * ibmvfc_eh_target_reset_handler - Reset the target |
| 2034 | * @cmd: scsi command struct |
| 2035 | * |
| 2036 | * Returns: |
| 2037 | * SUCCESS / FAILED |
| 2038 | **/ |
| 2039 | static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) |
| 2040 | { |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2041 | struct scsi_device *sdev = cmd->device; |
| 2042 | struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| 2043 | struct scsi_target *starget = scsi_target(sdev); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2044 | int reset_rc; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2045 | int rc = FAILED; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2046 | unsigned long cancel_rc = 0; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2047 | |
| 2048 | ENTER; |
| 2049 | ibmvfc_wait_while_resetting(vhost); |
| 2050 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2051 | reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2052 | |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2053 | if (!cancel_rc && !reset_rc) |
| 2054 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2055 | |
| 2056 | LEAVE; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2057 | return rc; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2058 | } |
| 2059 | |
| 2060 | /** |
| 2061 | * ibmvfc_eh_host_reset_handler - Reset the connection to the server |
| 2062 | * @cmd: struct scsi_cmnd having problems |
| 2063 | * |
| 2064 | **/ |
| 2065 | static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) |
| 2066 | { |
| 2067 | int rc; |
| 2068 | struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| 2069 | |
| 2070 | dev_err(vhost->dev, "Resetting connection due to error recovery\n"); |
| 2071 | rc = ibmvfc_issue_fc_host_lip(vhost->host); |
| 2072 | return rc ? FAILED : SUCCESS; |
| 2073 | } |
| 2074 | |
| 2075 | /** |
| 2076 | * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. |
| 2077 | * @rport: rport struct |
| 2078 | * |
| 2079 | * Return value: |
| 2080 | * none |
| 2081 | **/ |
| 2082 | static void ibmvfc_terminate_rport_io(struct fc_rport *rport) |
| 2083 | { |
| 2084 | struct scsi_target *starget = to_scsi_target(&rport->dev); |
| 2085 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2086 | struct ibmvfc_host *vhost = shost_priv(shost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2087 | unsigned long cancel_rc = 0; |
| 2088 | unsigned long abort_rc = 0; |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2089 | int rc = FAILED; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2090 | |
| 2091 | ENTER; |
| 2092 | starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| 2093 | starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); |
| 2094 | |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2095 | if (!cancel_rc && !abort_rc) |
| 2096 | rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); |
| 2097 | |
| 2098 | if (rc == FAILED) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2099 | ibmvfc_issue_fc_host_lip(shost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2100 | LEAVE; |
| 2101 | } |
| 2102 | |
| 2103 | static const struct { |
| 2104 | enum ibmvfc_async_event ae; |
| 2105 | const char *desc; |
| 2106 | } ae_desc [] = { |
| 2107 | { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, |
| 2108 | { IBMVFC_AE_ELS_LOGO, "LOGO" }, |
| 2109 | { IBMVFC_AE_ELS_PRLO, "PRLO" }, |
| 2110 | { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, |
| 2111 | { IBMVFC_AE_SCN_GROUP, "Group SCN" }, |
| 2112 | { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, |
| 2113 | { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, |
| 2114 | { IBMVFC_AE_LINK_UP, "Link Up" }, |
| 2115 | { IBMVFC_AE_LINK_DOWN, "Link Down" }, |
| 2116 | { IBMVFC_AE_LINK_DEAD, "Link Dead" }, |
| 2117 | { IBMVFC_AE_HALT, "Halt" }, |
| 2118 | { IBMVFC_AE_RESUME, "Resume" }, |
| 2119 | { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, |
| 2120 | }; |
| 2121 | |
| 2122 | static const char *unknown_ae = "Unknown async"; |
| 2123 | |
| 2124 | /** |
| 2125 | * ibmvfc_get_ae_desc - Get text description for async event |
| 2126 | * @ae: async event |
| 2127 | * |
| 2128 | **/ |
| 2129 | static const char *ibmvfc_get_ae_desc(u64 ae) |
| 2130 | { |
| 2131 | int i; |
| 2132 | |
| 2133 | for (i = 0; i < ARRAY_SIZE(ae_desc); i++) |
| 2134 | if (ae_desc[i].ae == ae) |
| 2135 | return ae_desc[i].desc; |
| 2136 | |
| 2137 | return unknown_ae; |
| 2138 | } |
| 2139 | |
| 2140 | /** |
| 2141 | * ibmvfc_handle_async - Handle an async event from the adapter |
| 2142 | * @crq: crq to process |
| 2143 | * @vhost: ibmvfc host struct |
| 2144 | * |
| 2145 | **/ |
| 2146 | static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, |
| 2147 | struct ibmvfc_host *vhost) |
| 2148 | { |
| 2149 | const char *desc = ibmvfc_get_ae_desc(crq->event); |
| 2150 | |
Stephen Rothwell | 775a42e | 2009-01-06 14:59:00 +0000 | [diff] [blame] | 2151 | ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," |
| 2152 | " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2153 | |
| 2154 | switch (crq->event) { |
| 2155 | case IBMVFC_AE_LINK_UP: |
| 2156 | case IBMVFC_AE_RESUME: |
| 2157 | vhost->events_to_log |= IBMVFC_AE_LINKUP; |
Brian King | d2131b3 | 2008-12-18 09:26:51 -0600 | [diff] [blame] | 2158 | vhost->delay_init = 1; |
| 2159 | __ibmvfc_reset_host(vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2160 | break; |
| 2161 | case IBMVFC_AE_SCN_FABRIC: |
Brian King | d2131b3 | 2008-12-18 09:26:51 -0600 | [diff] [blame] | 2162 | case IBMVFC_AE_SCN_DOMAIN: |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2163 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
Brian King | d2131b3 | 2008-12-18 09:26:51 -0600 | [diff] [blame] | 2164 | vhost->delay_init = 1; |
| 2165 | __ibmvfc_reset_host(vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2166 | break; |
| 2167 | case IBMVFC_AE_SCN_NPORT: |
| 2168 | case IBMVFC_AE_SCN_GROUP: |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2169 | vhost->events_to_log |= IBMVFC_AE_RSCN; |
| 2170 | case IBMVFC_AE_ELS_LOGO: |
| 2171 | case IBMVFC_AE_ELS_PRLO: |
| 2172 | case IBMVFC_AE_ELS_PLOGI: |
| 2173 | ibmvfc_reinit_host(vhost); |
| 2174 | break; |
| 2175 | case IBMVFC_AE_LINK_DOWN: |
| 2176 | case IBMVFC_AE_ADAPTER_FAILED: |
| 2177 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2178 | break; |
| 2179 | case IBMVFC_AE_LINK_DEAD: |
| 2180 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2181 | break; |
| 2182 | case IBMVFC_AE_HALT: |
| 2183 | ibmvfc_link_down(vhost, IBMVFC_HALTED); |
| 2184 | break; |
| 2185 | default: |
Stephen Rothwell | 775a42e | 2009-01-06 14:59:00 +0000 | [diff] [blame] | 2186 | dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2187 | break; |
| 2188 | }; |
| 2189 | } |
| 2190 | |
| 2191 | /** |
| 2192 | * ibmvfc_handle_crq - Handles and frees received events in the CRQ |
| 2193 | * @crq: Command/Response queue |
| 2194 | * @vhost: ibmvfc host struct |
| 2195 | * |
| 2196 | **/ |
| 2197 | static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) |
| 2198 | { |
| 2199 | long rc; |
| 2200 | struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; |
| 2201 | |
| 2202 | switch (crq->valid) { |
| 2203 | case IBMVFC_CRQ_INIT_RSP: |
| 2204 | switch (crq->format) { |
| 2205 | case IBMVFC_CRQ_INIT: |
| 2206 | dev_info(vhost->dev, "Partner initialized\n"); |
| 2207 | /* Send back a response */ |
| 2208 | rc = ibmvfc_send_crq_init_complete(vhost); |
| 2209 | if (rc == 0) |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2210 | ibmvfc_init_host(vhost, 0); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2211 | else |
| 2212 | dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); |
| 2213 | break; |
| 2214 | case IBMVFC_CRQ_INIT_COMPLETE: |
| 2215 | dev_info(vhost->dev, "Partner initialization complete\n"); |
Brian King | cf6f10d | 2008-08-15 10:59:23 -0500 | [diff] [blame] | 2216 | ibmvfc_init_host(vhost, 0); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2217 | break; |
| 2218 | default: |
| 2219 | dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); |
| 2220 | } |
| 2221 | return; |
| 2222 | case IBMVFC_CRQ_XPORT_EVENT: |
| 2223 | vhost->state = IBMVFC_NO_CRQ; |
| 2224 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 2225 | if (crq->format == IBMVFC_PARTITION_MIGRATED) { |
| 2226 | /* We need to re-setup the interpartition connection */ |
| 2227 | dev_info(vhost->dev, "Re-enabling adapter\n"); |
| 2228 | vhost->client_migrated = 1; |
| 2229 | ibmvfc_purge_requests(vhost, DID_REQUEUE); |
| 2230 | if ((rc = ibmvfc_reenable_crq_queue(vhost)) || |
| 2231 | (rc = ibmvfc_send_crq_init(vhost))) { |
| 2232 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2233 | dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); |
| 2234 | } else |
| 2235 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2236 | } else { |
| 2237 | dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); |
| 2238 | |
| 2239 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 2240 | if ((rc = ibmvfc_reset_crq(vhost)) || |
| 2241 | (rc = ibmvfc_send_crq_init(vhost))) { |
| 2242 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 2243 | dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); |
| 2244 | } else |
| 2245 | ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| 2246 | } |
| 2247 | return; |
| 2248 | case IBMVFC_CRQ_CMD_RSP: |
| 2249 | break; |
| 2250 | default: |
| 2251 | dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); |
| 2252 | return; |
| 2253 | } |
| 2254 | |
| 2255 | if (crq->format == IBMVFC_ASYNC_EVENT) |
| 2256 | return; |
| 2257 | |
| 2258 | /* The only kind of payload CRQs we should get are responses to |
| 2259 | * things we send. Make sure this response is to something we |
| 2260 | * actually sent |
| 2261 | */ |
| 2262 | if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { |
Stephen Rothwell | 775a42e | 2009-01-06 14:59:00 +0000 | [diff] [blame] | 2263 | dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2264 | crq->ioba); |
| 2265 | return; |
| 2266 | } |
| 2267 | |
| 2268 | if (unlikely(atomic_read(&evt->free))) { |
Stephen Rothwell | 775a42e | 2009-01-06 14:59:00 +0000 | [diff] [blame] | 2269 | dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2270 | crq->ioba); |
| 2271 | return; |
| 2272 | } |
| 2273 | |
| 2274 | del_timer(&evt->timer); |
| 2275 | list_del(&evt->queue); |
| 2276 | ibmvfc_trc_end(evt); |
| 2277 | evt->done(evt); |
| 2278 | } |
| 2279 | |
| 2280 | /** |
| 2281 | * ibmvfc_scan_finished - Check if the device scan is done. |
| 2282 | * @shost: scsi host struct |
| 2283 | * @time: current elapsed time |
| 2284 | * |
| 2285 | * Returns: |
| 2286 | * 0 if scan is not done / 1 if scan is done |
| 2287 | **/ |
| 2288 | static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| 2289 | { |
| 2290 | unsigned long flags; |
| 2291 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2292 | int done = 0; |
| 2293 | |
| 2294 | spin_lock_irqsave(shost->host_lock, flags); |
| 2295 | if (time >= (init_timeout * HZ)) { |
| 2296 | dev_info(vhost->dev, "Scan taking longer than %d seconds, " |
| 2297 | "continuing initialization\n", init_timeout); |
| 2298 | done = 1; |
| 2299 | } |
| 2300 | |
| 2301 | if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) |
| 2302 | done = 1; |
| 2303 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2304 | return done; |
| 2305 | } |
| 2306 | |
| 2307 | /** |
| 2308 | * ibmvfc_slave_alloc - Setup the device's task set value |
| 2309 | * @sdev: struct scsi_device device to configure |
| 2310 | * |
| 2311 | * Set the device's task set value so that error handling works as |
| 2312 | * expected. |
| 2313 | * |
| 2314 | * Returns: |
| 2315 | * 0 on success / -ENXIO if device does not exist |
| 2316 | **/ |
| 2317 | static int ibmvfc_slave_alloc(struct scsi_device *sdev) |
| 2318 | { |
| 2319 | struct Scsi_Host *shost = sdev->host; |
| 2320 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 2321 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2322 | unsigned long flags = 0; |
| 2323 | |
| 2324 | if (!rport || fc_remote_port_chkready(rport)) |
| 2325 | return -ENXIO; |
| 2326 | |
| 2327 | spin_lock_irqsave(shost->host_lock, flags); |
| 2328 | sdev->hostdata = (void *)(unsigned long)vhost->task_set++; |
| 2329 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2330 | return 0; |
| 2331 | } |
| 2332 | |
| 2333 | /** |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2334 | * ibmvfc_target_alloc - Setup the target's task set value |
| 2335 | * @starget: struct scsi_target |
| 2336 | * |
| 2337 | * Set the target's task set value so that error handling works as |
| 2338 | * expected. |
| 2339 | * |
| 2340 | * Returns: |
| 2341 | * 0 on success / -ENXIO if device does not exist |
| 2342 | **/ |
| 2343 | static int ibmvfc_target_alloc(struct scsi_target *starget) |
| 2344 | { |
| 2345 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2346 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2347 | unsigned long flags = 0; |
| 2348 | |
| 2349 | spin_lock_irqsave(shost->host_lock, flags); |
| 2350 | starget->hostdata = (void *)(unsigned long)vhost->task_set++; |
| 2351 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2352 | return 0; |
| 2353 | } |
| 2354 | |
| 2355 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2356 | * ibmvfc_slave_configure - Configure the device |
| 2357 | * @sdev: struct scsi_device device to configure |
| 2358 | * |
| 2359 | * Enable allow_restart for a device if it is a disk. Adjust the |
| 2360 | * queue_depth here also. |
| 2361 | * |
| 2362 | * Returns: |
| 2363 | * 0 |
| 2364 | **/ |
| 2365 | static int ibmvfc_slave_configure(struct scsi_device *sdev) |
| 2366 | { |
| 2367 | struct Scsi_Host *shost = sdev->host; |
| 2368 | struct fc_rport *rport = starget_to_rport(sdev->sdev_target); |
| 2369 | unsigned long flags = 0; |
| 2370 | |
| 2371 | spin_lock_irqsave(shost->host_lock, flags); |
| 2372 | if (sdev->type == TYPE_DISK) |
| 2373 | sdev->allow_restart = 1; |
| 2374 | |
| 2375 | if (sdev->tagged_supported) { |
| 2376 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
| 2377 | scsi_activate_tcq(sdev, sdev->queue_depth); |
| 2378 | } else |
| 2379 | scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| 2380 | |
| 2381 | rport->dev_loss_tmo = dev_loss_tmo; |
| 2382 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2383 | return 0; |
| 2384 | } |
| 2385 | |
| 2386 | /** |
| 2387 | * ibmvfc_change_queue_depth - Change the device's queue depth |
| 2388 | * @sdev: scsi device struct |
| 2389 | * @qdepth: depth to set |
| 2390 | * |
| 2391 | * Return value: |
| 2392 | * actual depth set |
| 2393 | **/ |
| 2394 | static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
| 2395 | { |
| 2396 | if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) |
| 2397 | qdepth = IBMVFC_MAX_CMDS_PER_LUN; |
| 2398 | |
| 2399 | scsi_adjust_queue_depth(sdev, 0, qdepth); |
| 2400 | return sdev->queue_depth; |
| 2401 | } |
| 2402 | |
| 2403 | /** |
| 2404 | * ibmvfc_change_queue_type - Change the device's queue type |
| 2405 | * @sdev: scsi device struct |
| 2406 | * @tag_type: type of tags to use |
| 2407 | * |
| 2408 | * Return value: |
| 2409 | * actual queue type set |
| 2410 | **/ |
| 2411 | static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) |
| 2412 | { |
| 2413 | if (sdev->tagged_supported) { |
| 2414 | scsi_set_tag_type(sdev, tag_type); |
| 2415 | |
| 2416 | if (tag_type) |
| 2417 | scsi_activate_tcq(sdev, sdev->queue_depth); |
| 2418 | else |
| 2419 | scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| 2420 | } else |
| 2421 | tag_type = 0; |
| 2422 | |
| 2423 | return tag_type; |
| 2424 | } |
| 2425 | |
| 2426 | static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
| 2427 | struct device_attribute *attr, char *buf) |
| 2428 | { |
| 2429 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2430 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2431 | |
| 2432 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2433 | vhost->login_buf->resp.partition_name); |
| 2434 | } |
| 2435 | |
| 2436 | static struct device_attribute ibmvfc_host_partition_name = { |
| 2437 | .attr = { |
| 2438 | .name = "partition_name", |
| 2439 | .mode = S_IRUGO, |
| 2440 | }, |
| 2441 | .show = ibmvfc_show_host_partition_name, |
| 2442 | }; |
| 2443 | |
| 2444 | static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
| 2445 | struct device_attribute *attr, char *buf) |
| 2446 | { |
| 2447 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2448 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2449 | |
| 2450 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2451 | vhost->login_buf->resp.device_name); |
| 2452 | } |
| 2453 | |
| 2454 | static struct device_attribute ibmvfc_host_device_name = { |
| 2455 | .attr = { |
| 2456 | .name = "device_name", |
| 2457 | .mode = S_IRUGO, |
| 2458 | }, |
| 2459 | .show = ibmvfc_show_host_device_name, |
| 2460 | }; |
| 2461 | |
| 2462 | static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
| 2463 | struct device_attribute *attr, char *buf) |
| 2464 | { |
| 2465 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2466 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2467 | |
| 2468 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2469 | vhost->login_buf->resp.port_loc_code); |
| 2470 | } |
| 2471 | |
| 2472 | static struct device_attribute ibmvfc_host_loc_code = { |
| 2473 | .attr = { |
| 2474 | .name = "port_loc_code", |
| 2475 | .mode = S_IRUGO, |
| 2476 | }, |
| 2477 | .show = ibmvfc_show_host_loc_code, |
| 2478 | }; |
| 2479 | |
| 2480 | static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
| 2481 | struct device_attribute *attr, char *buf) |
| 2482 | { |
| 2483 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2484 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2485 | |
| 2486 | return snprintf(buf, PAGE_SIZE, "%s\n", |
| 2487 | vhost->login_buf->resp.drc_name); |
| 2488 | } |
| 2489 | |
| 2490 | static struct device_attribute ibmvfc_host_drc_name = { |
| 2491 | .attr = { |
| 2492 | .name = "drc_name", |
| 2493 | .mode = S_IRUGO, |
| 2494 | }, |
| 2495 | .show = ibmvfc_show_host_drc_name, |
| 2496 | }; |
| 2497 | |
| 2498 | static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
| 2499 | struct device_attribute *attr, char *buf) |
| 2500 | { |
| 2501 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2502 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2503 | return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); |
| 2504 | } |
| 2505 | |
| 2506 | static struct device_attribute ibmvfc_host_npiv_version = { |
| 2507 | .attr = { |
| 2508 | .name = "npiv_version", |
| 2509 | .mode = S_IRUGO, |
| 2510 | }, |
| 2511 | .show = ibmvfc_show_host_npiv_version, |
| 2512 | }; |
| 2513 | |
| 2514 | /** |
| 2515 | * ibmvfc_show_log_level - Show the adapter's error logging level |
| 2516 | * @dev: class device struct |
| 2517 | * @buf: buffer |
| 2518 | * |
| 2519 | * Return value: |
| 2520 | * number of bytes printed to buffer |
| 2521 | **/ |
| 2522 | static ssize_t ibmvfc_show_log_level(struct device *dev, |
| 2523 | struct device_attribute *attr, char *buf) |
| 2524 | { |
| 2525 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2526 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2527 | unsigned long flags = 0; |
| 2528 | int len; |
| 2529 | |
| 2530 | spin_lock_irqsave(shost->host_lock, flags); |
| 2531 | len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); |
| 2532 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2533 | return len; |
| 2534 | } |
| 2535 | |
| 2536 | /** |
| 2537 | * ibmvfc_store_log_level - Change the adapter's error logging level |
| 2538 | * @dev: class device struct |
| 2539 | * @buf: buffer |
| 2540 | * |
| 2541 | * Return value: |
| 2542 | * number of bytes printed to buffer |
| 2543 | **/ |
| 2544 | static ssize_t ibmvfc_store_log_level(struct device *dev, |
| 2545 | struct device_attribute *attr, |
| 2546 | const char *buf, size_t count) |
| 2547 | { |
| 2548 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2549 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2550 | unsigned long flags = 0; |
| 2551 | |
| 2552 | spin_lock_irqsave(shost->host_lock, flags); |
| 2553 | vhost->log_level = simple_strtoul(buf, NULL, 10); |
| 2554 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2555 | return strlen(buf); |
| 2556 | } |
| 2557 | |
| 2558 | static struct device_attribute ibmvfc_log_level_attr = { |
| 2559 | .attr = { |
| 2560 | .name = "log_level", |
| 2561 | .mode = S_IRUGO | S_IWUSR, |
| 2562 | }, |
| 2563 | .show = ibmvfc_show_log_level, |
| 2564 | .store = ibmvfc_store_log_level |
| 2565 | }; |
| 2566 | |
| 2567 | #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| 2568 | /** |
| 2569 | * ibmvfc_read_trace - Dump the adapter trace |
| 2570 | * @kobj: kobject struct |
| 2571 | * @bin_attr: bin_attribute struct |
| 2572 | * @buf: buffer |
| 2573 | * @off: offset |
| 2574 | * @count: buffer size |
| 2575 | * |
| 2576 | * Return value: |
| 2577 | * number of bytes printed to buffer |
| 2578 | **/ |
| 2579 | static ssize_t ibmvfc_read_trace(struct kobject *kobj, |
| 2580 | struct bin_attribute *bin_attr, |
| 2581 | char *buf, loff_t off, size_t count) |
| 2582 | { |
| 2583 | struct device *dev = container_of(kobj, struct device, kobj); |
| 2584 | struct Scsi_Host *shost = class_to_shost(dev); |
| 2585 | struct ibmvfc_host *vhost = shost_priv(shost); |
| 2586 | unsigned long flags = 0; |
| 2587 | int size = IBMVFC_TRACE_SIZE; |
| 2588 | char *src = (char *)vhost->trace; |
| 2589 | |
| 2590 | if (off > size) |
| 2591 | return 0; |
| 2592 | if (off + count > size) { |
| 2593 | size -= off; |
| 2594 | count = size; |
| 2595 | } |
| 2596 | |
| 2597 | spin_lock_irqsave(shost->host_lock, flags); |
| 2598 | memcpy(buf, &src[off], count); |
| 2599 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2600 | return count; |
| 2601 | } |
| 2602 | |
| 2603 | static struct bin_attribute ibmvfc_trace_attr = { |
| 2604 | .attr = { |
| 2605 | .name = "trace", |
| 2606 | .mode = S_IRUGO, |
| 2607 | }, |
| 2608 | .size = 0, |
| 2609 | .read = ibmvfc_read_trace, |
| 2610 | }; |
| 2611 | #endif |
| 2612 | |
| 2613 | static struct device_attribute *ibmvfc_attrs[] = { |
| 2614 | &ibmvfc_host_partition_name, |
| 2615 | &ibmvfc_host_device_name, |
| 2616 | &ibmvfc_host_loc_code, |
| 2617 | &ibmvfc_host_drc_name, |
| 2618 | &ibmvfc_host_npiv_version, |
| 2619 | &ibmvfc_log_level_attr, |
| 2620 | NULL |
| 2621 | }; |
| 2622 | |
| 2623 | static struct scsi_host_template driver_template = { |
| 2624 | .module = THIS_MODULE, |
| 2625 | .name = "IBM POWER Virtual FC Adapter", |
| 2626 | .proc_name = IBMVFC_NAME, |
| 2627 | .queuecommand = ibmvfc_queuecommand, |
| 2628 | .eh_abort_handler = ibmvfc_eh_abort_handler, |
| 2629 | .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, |
| 2630 | .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, |
| 2631 | .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, |
| 2632 | .slave_alloc = ibmvfc_slave_alloc, |
| 2633 | .slave_configure = ibmvfc_slave_configure, |
Brian King | ad8dcff | 2008-10-29 08:46:41 -0500 | [diff] [blame] | 2634 | .target_alloc = ibmvfc_target_alloc, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2635 | .scan_finished = ibmvfc_scan_finished, |
| 2636 | .change_queue_depth = ibmvfc_change_queue_depth, |
| 2637 | .change_queue_type = ibmvfc_change_queue_type, |
| 2638 | .cmd_per_lun = 16, |
| 2639 | .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, |
| 2640 | .this_id = -1, |
| 2641 | .sg_tablesize = SG_ALL, |
| 2642 | .max_sectors = IBMVFC_MAX_SECTORS, |
| 2643 | .use_clustering = ENABLE_CLUSTERING, |
| 2644 | .shost_attrs = ibmvfc_attrs, |
| 2645 | }; |
| 2646 | |
| 2647 | /** |
| 2648 | * ibmvfc_next_async_crq - Returns the next entry in async queue |
| 2649 | * @vhost: ibmvfc host struct |
| 2650 | * |
| 2651 | * Returns: |
| 2652 | * Pointer to next entry in queue / NULL if empty |
| 2653 | **/ |
| 2654 | static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) |
| 2655 | { |
| 2656 | struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; |
| 2657 | struct ibmvfc_async_crq *crq; |
| 2658 | |
| 2659 | crq = &async_crq->msgs[async_crq->cur]; |
| 2660 | if (crq->valid & 0x80) { |
| 2661 | if (++async_crq->cur == async_crq->size) |
| 2662 | async_crq->cur = 0; |
| 2663 | } else |
| 2664 | crq = NULL; |
| 2665 | |
| 2666 | return crq; |
| 2667 | } |
| 2668 | |
| 2669 | /** |
| 2670 | * ibmvfc_next_crq - Returns the next entry in message queue |
| 2671 | * @vhost: ibmvfc host struct |
| 2672 | * |
| 2673 | * Returns: |
| 2674 | * Pointer to next entry in queue / NULL if empty |
| 2675 | **/ |
| 2676 | static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) |
| 2677 | { |
| 2678 | struct ibmvfc_crq_queue *queue = &vhost->crq; |
| 2679 | struct ibmvfc_crq *crq; |
| 2680 | |
| 2681 | crq = &queue->msgs[queue->cur]; |
| 2682 | if (crq->valid & 0x80) { |
| 2683 | if (++queue->cur == queue->size) |
| 2684 | queue->cur = 0; |
| 2685 | } else |
| 2686 | crq = NULL; |
| 2687 | |
| 2688 | return crq; |
| 2689 | } |
| 2690 | |
| 2691 | /** |
| 2692 | * ibmvfc_interrupt - Interrupt handler |
| 2693 | * @irq: number of irq to handle, not used |
| 2694 | * @dev_instance: ibmvfc_host that received interrupt |
| 2695 | * |
| 2696 | * Returns: |
| 2697 | * IRQ_HANDLED |
| 2698 | **/ |
| 2699 | static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) |
| 2700 | { |
| 2701 | struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; |
| 2702 | struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| 2703 | struct ibmvfc_crq *crq; |
| 2704 | struct ibmvfc_async_crq *async; |
| 2705 | unsigned long flags; |
| 2706 | int done = 0; |
| 2707 | |
| 2708 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 2709 | vio_disable_interrupts(to_vio_dev(vhost->dev)); |
| 2710 | while (!done) { |
| 2711 | /* Pull all the valid messages off the CRQ */ |
| 2712 | while ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| 2713 | ibmvfc_handle_crq(crq, vhost); |
| 2714 | crq->valid = 0; |
| 2715 | } |
| 2716 | |
| 2717 | /* Pull all the valid messages off the async CRQ */ |
| 2718 | while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| 2719 | ibmvfc_handle_async(async, vhost); |
| 2720 | async->valid = 0; |
| 2721 | } |
| 2722 | |
| 2723 | vio_enable_interrupts(vdev); |
| 2724 | if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| 2725 | vio_disable_interrupts(vdev); |
| 2726 | ibmvfc_handle_crq(crq, vhost); |
| 2727 | crq->valid = 0; |
| 2728 | } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| 2729 | vio_disable_interrupts(vdev); |
| 2730 | ibmvfc_handle_async(async, vhost); |
Brian King | 4081b77 | 2008-11-14 13:33:50 -0600 | [diff] [blame] | 2731 | async->valid = 0; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2732 | } else |
| 2733 | done = 1; |
| 2734 | } |
| 2735 | |
| 2736 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 2737 | return IRQ_HANDLED; |
| 2738 | } |
| 2739 | |
| 2740 | /** |
| 2741 | * ibmvfc_init_tgt - Set the next init job step for the target |
| 2742 | * @tgt: ibmvfc target struct |
| 2743 | * @job_step: job step to perform |
| 2744 | * |
| 2745 | **/ |
| 2746 | static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, |
| 2747 | void (*job_step) (struct ibmvfc_target *)) |
| 2748 | { |
| 2749 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); |
| 2750 | tgt->job_step = job_step; |
| 2751 | wake_up(&tgt->vhost->work_wait_q); |
| 2752 | } |
| 2753 | |
| 2754 | /** |
| 2755 | * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization |
| 2756 | * @tgt: ibmvfc target struct |
| 2757 | * @job_step: initialization job step |
| 2758 | * |
| 2759 | **/ |
| 2760 | static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
| 2761 | void (*job_step) (struct ibmvfc_target *)) |
| 2762 | { |
Brian King | 1c41fa82 | 2008-12-03 11:02:54 -0600 | [diff] [blame] | 2763 | if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2764 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 2765 | wake_up(&tgt->vhost->work_wait_q); |
| 2766 | } else |
| 2767 | ibmvfc_init_tgt(tgt, job_step); |
| 2768 | } |
| 2769 | |
| 2770 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2771 | * ibmvfc_tgt_prli_done - Completion handler for Process Login |
| 2772 | * @evt: ibmvfc event struct |
| 2773 | * |
| 2774 | **/ |
| 2775 | static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) |
| 2776 | { |
| 2777 | struct ibmvfc_target *tgt = evt->tgt; |
| 2778 | struct ibmvfc_host *vhost = evt->vhost; |
| 2779 | struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; |
| 2780 | u32 status = rsp->common.status; |
| 2781 | |
| 2782 | vhost->discovery_threads--; |
| 2783 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2784 | switch (status) { |
| 2785 | case IBMVFC_MAD_SUCCESS: |
| 2786 | tgt_dbg(tgt, "Process Login succeeded\n"); |
| 2787 | tgt->need_login = 0; |
| 2788 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); |
| 2789 | break; |
| 2790 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2791 | break; |
| 2792 | case IBMVFC_MAD_CRQ_ERROR: |
| 2793 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| 2794 | break; |
| 2795 | case IBMVFC_MAD_FAILED: |
| 2796 | default: |
| 2797 | tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", |
| 2798 | ibmvfc_get_cmd_error(rsp->status, rsp->error), |
| 2799 | rsp->status, rsp->error, status); |
| 2800 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 2801 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 2802 | else |
| 2803 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2804 | break; |
| 2805 | }; |
| 2806 | |
| 2807 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2808 | ibmvfc_free_event(evt); |
| 2809 | wake_up(&vhost->work_wait_q); |
| 2810 | } |
| 2811 | |
| 2812 | /** |
| 2813 | * ibmvfc_tgt_send_prli - Send a process login |
| 2814 | * @tgt: ibmvfc target struct |
| 2815 | * |
| 2816 | **/ |
| 2817 | static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) |
| 2818 | { |
| 2819 | struct ibmvfc_process_login *prli; |
| 2820 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2821 | struct ibmvfc_event *evt; |
| 2822 | |
| 2823 | if (vhost->discovery_threads >= disc_threads) |
| 2824 | return; |
| 2825 | |
| 2826 | kref_get(&tgt->kref); |
| 2827 | evt = ibmvfc_get_event(vhost); |
| 2828 | vhost->discovery_threads++; |
| 2829 | ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); |
| 2830 | evt->tgt = tgt; |
| 2831 | prli = &evt->iu.prli; |
| 2832 | memset(prli, 0, sizeof(*prli)); |
| 2833 | prli->common.version = 1; |
| 2834 | prli->common.opcode = IBMVFC_PROCESS_LOGIN; |
| 2835 | prli->common.length = sizeof(*prli); |
| 2836 | prli->scsi_id = tgt->scsi_id; |
| 2837 | |
| 2838 | prli->parms.type = IBMVFC_SCSI_FCP_TYPE; |
| 2839 | prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; |
| 2840 | prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; |
| 2841 | |
| 2842 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2843 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2844 | vhost->discovery_threads--; |
| 2845 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2846 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2847 | } else |
| 2848 | tgt_dbg(tgt, "Sent process login\n"); |
| 2849 | } |
| 2850 | |
| 2851 | /** |
| 2852 | * ibmvfc_tgt_plogi_done - Completion handler for Port Login |
| 2853 | * @evt: ibmvfc event struct |
| 2854 | * |
| 2855 | **/ |
| 2856 | static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) |
| 2857 | { |
| 2858 | struct ibmvfc_target *tgt = evt->tgt; |
| 2859 | struct ibmvfc_host *vhost = evt->vhost; |
| 2860 | struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; |
| 2861 | u32 status = rsp->common.status; |
| 2862 | |
| 2863 | vhost->discovery_threads--; |
| 2864 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2865 | switch (status) { |
| 2866 | case IBMVFC_MAD_SUCCESS: |
| 2867 | tgt_dbg(tgt, "Port Login succeeded\n"); |
| 2868 | if (tgt->ids.port_name && |
| 2869 | tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { |
| 2870 | vhost->reinit = 1; |
| 2871 | tgt_dbg(tgt, "Port re-init required\n"); |
| 2872 | break; |
| 2873 | } |
| 2874 | tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
| 2875 | tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); |
| 2876 | tgt->ids.port_id = tgt->scsi_id; |
| 2877 | tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; |
| 2878 | memcpy(&tgt->service_parms, &rsp->service_parms, |
| 2879 | sizeof(tgt->service_parms)); |
| 2880 | memcpy(&tgt->service_parms_change, &rsp->service_parms_change, |
| 2881 | sizeof(tgt->service_parms_change)); |
| 2882 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); |
| 2883 | break; |
| 2884 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2885 | break; |
| 2886 | case IBMVFC_MAD_CRQ_ERROR: |
| 2887 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| 2888 | break; |
| 2889 | case IBMVFC_MAD_FAILED: |
| 2890 | default: |
| 2891 | tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 2892 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| 2893 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| 2894 | ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); |
| 2895 | |
| 2896 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 2897 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 2898 | else |
| 2899 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 2900 | break; |
| 2901 | }; |
| 2902 | |
| 2903 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2904 | ibmvfc_free_event(evt); |
| 2905 | wake_up(&vhost->work_wait_q); |
| 2906 | } |
| 2907 | |
| 2908 | /** |
| 2909 | * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target |
| 2910 | * @tgt: ibmvfc target struct |
| 2911 | * |
| 2912 | **/ |
| 2913 | static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) |
| 2914 | { |
| 2915 | struct ibmvfc_port_login *plogi; |
| 2916 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2917 | struct ibmvfc_event *evt; |
| 2918 | |
| 2919 | if (vhost->discovery_threads >= disc_threads) |
| 2920 | return; |
| 2921 | |
| 2922 | kref_get(&tgt->kref); |
| 2923 | evt = ibmvfc_get_event(vhost); |
| 2924 | vhost->discovery_threads++; |
| 2925 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 2926 | ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); |
| 2927 | evt->tgt = tgt; |
| 2928 | plogi = &evt->iu.plogi; |
| 2929 | memset(plogi, 0, sizeof(*plogi)); |
| 2930 | plogi->common.version = 1; |
| 2931 | plogi->common.opcode = IBMVFC_PORT_LOGIN; |
| 2932 | plogi->common.length = sizeof(*plogi); |
| 2933 | plogi->scsi_id = tgt->scsi_id; |
| 2934 | |
| 2935 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 2936 | vhost->discovery_threads--; |
| 2937 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2938 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2939 | } else |
| 2940 | tgt_dbg(tgt, "Sent port login\n"); |
| 2941 | } |
| 2942 | |
| 2943 | /** |
| 2944 | * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD |
| 2945 | * @evt: ibmvfc event struct |
| 2946 | * |
| 2947 | **/ |
| 2948 | static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) |
| 2949 | { |
| 2950 | struct ibmvfc_target *tgt = evt->tgt; |
| 2951 | struct ibmvfc_host *vhost = evt->vhost; |
| 2952 | struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; |
| 2953 | u32 status = rsp->common.status; |
| 2954 | |
| 2955 | vhost->discovery_threads--; |
| 2956 | ibmvfc_free_event(evt); |
| 2957 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 2958 | |
| 2959 | switch (status) { |
| 2960 | case IBMVFC_MAD_SUCCESS: |
| 2961 | tgt_dbg(tgt, "Implicit Logout succeeded\n"); |
| 2962 | break; |
| 2963 | case IBMVFC_MAD_DRIVER_FAILED: |
| 2964 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2965 | wake_up(&vhost->work_wait_q); |
| 2966 | return; |
| 2967 | case IBMVFC_MAD_FAILED: |
| 2968 | default: |
| 2969 | tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); |
| 2970 | break; |
| 2971 | }; |
| 2972 | |
| 2973 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) |
| 2974 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); |
| 2975 | else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && |
| 2976 | tgt->scsi_id != tgt->new_scsi_id) |
| 2977 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 2978 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 2979 | wake_up(&vhost->work_wait_q); |
| 2980 | } |
| 2981 | |
| 2982 | /** |
| 2983 | * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target |
| 2984 | * @tgt: ibmvfc target struct |
| 2985 | * |
| 2986 | **/ |
| 2987 | static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) |
| 2988 | { |
| 2989 | struct ibmvfc_implicit_logout *mad; |
| 2990 | struct ibmvfc_host *vhost = tgt->vhost; |
| 2991 | struct ibmvfc_event *evt; |
| 2992 | |
| 2993 | if (vhost->discovery_threads >= disc_threads) |
| 2994 | return; |
| 2995 | |
| 2996 | kref_get(&tgt->kref); |
| 2997 | evt = ibmvfc_get_event(vhost); |
| 2998 | vhost->discovery_threads++; |
| 2999 | ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); |
| 3000 | evt->tgt = tgt; |
| 3001 | mad = &evt->iu.implicit_logout; |
| 3002 | memset(mad, 0, sizeof(*mad)); |
| 3003 | mad->common.version = 1; |
| 3004 | mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; |
| 3005 | mad->common.length = sizeof(*mad); |
| 3006 | mad->old_scsi_id = tgt->scsi_id; |
| 3007 | |
| 3008 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3009 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3010 | vhost->discovery_threads--; |
| 3011 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3012 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3013 | } else |
| 3014 | tgt_dbg(tgt, "Sent Implicit Logout\n"); |
| 3015 | } |
| 3016 | |
| 3017 | /** |
Brian King | 989b854 | 2008-07-22 08:31:47 -0500 | [diff] [blame] | 3018 | * ibmvfc_adisc_needs_plogi - Does device need PLOGI? |
| 3019 | * @mad: ibmvfc passthru mad struct |
| 3020 | * @tgt: ibmvfc target struct |
| 3021 | * |
| 3022 | * Returns: |
| 3023 | * 1 if PLOGI needed / 0 if PLOGI not needed |
| 3024 | **/ |
| 3025 | static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, |
| 3026 | struct ibmvfc_target *tgt) |
| 3027 | { |
| 3028 | if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, |
| 3029 | sizeof(tgt->ids.port_name))) |
| 3030 | return 1; |
| 3031 | if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, |
| 3032 | sizeof(tgt->ids.node_name))) |
| 3033 | return 1; |
| 3034 | if (mad->fc_iu.response[6] != tgt->scsi_id) |
| 3035 | return 1; |
| 3036 | return 0; |
| 3037 | } |
| 3038 | |
| 3039 | /** |
| 3040 | * ibmvfc_tgt_adisc_done - Completion handler for ADISC |
| 3041 | * @evt: ibmvfc event struct |
| 3042 | * |
| 3043 | **/ |
| 3044 | static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) |
| 3045 | { |
| 3046 | struct ibmvfc_target *tgt = evt->tgt; |
| 3047 | struct ibmvfc_host *vhost = evt->vhost; |
| 3048 | struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; |
| 3049 | u32 status = mad->common.status; |
| 3050 | u8 fc_reason, fc_explain; |
| 3051 | |
| 3052 | vhost->discovery_threads--; |
| 3053 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3054 | |
| 3055 | switch (status) { |
| 3056 | case IBMVFC_MAD_SUCCESS: |
| 3057 | tgt_dbg(tgt, "ADISC succeeded\n"); |
| 3058 | if (ibmvfc_adisc_needs_plogi(mad, tgt)) |
| 3059 | tgt->need_login = 1; |
| 3060 | break; |
| 3061 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3062 | break; |
| 3063 | case IBMVFC_MAD_FAILED: |
| 3064 | default: |
| 3065 | tgt->need_login = 1; |
| 3066 | fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; |
| 3067 | fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; |
| 3068 | tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 3069 | ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), |
| 3070 | mad->iu.status, mad->iu.error, |
| 3071 | ibmvfc_get_fc_type(fc_reason), fc_reason, |
| 3072 | ibmvfc_get_ls_explain(fc_explain), fc_explain, status); |
| 3073 | break; |
| 3074 | }; |
| 3075 | |
| 3076 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3077 | ibmvfc_free_event(evt); |
| 3078 | wake_up(&vhost->work_wait_q); |
| 3079 | } |
| 3080 | |
| 3081 | /** |
| 3082 | * ibmvfc_init_passthru - Initialize an event struct for FC passthru |
| 3083 | * @evt: ibmvfc event struct |
| 3084 | * |
| 3085 | **/ |
| 3086 | static void ibmvfc_init_passthru(struct ibmvfc_event *evt) |
| 3087 | { |
| 3088 | struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; |
| 3089 | |
| 3090 | memset(mad, 0, sizeof(*mad)); |
| 3091 | mad->common.version = 1; |
| 3092 | mad->common.opcode = IBMVFC_PASSTHRU; |
| 3093 | mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); |
| 3094 | mad->cmd_ioba.va = (u64)evt->crq.ioba + |
| 3095 | offsetof(struct ibmvfc_passthru_mad, iu); |
| 3096 | mad->cmd_ioba.len = sizeof(mad->iu); |
| 3097 | mad->iu.cmd_len = sizeof(mad->fc_iu.payload); |
| 3098 | mad->iu.rsp_len = sizeof(mad->fc_iu.response); |
| 3099 | mad->iu.cmd.va = (u64)evt->crq.ioba + |
| 3100 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| 3101 | offsetof(struct ibmvfc_passthru_fc_iu, payload); |
| 3102 | mad->iu.cmd.len = sizeof(mad->fc_iu.payload); |
| 3103 | mad->iu.rsp.va = (u64)evt->crq.ioba + |
| 3104 | offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| 3105 | offsetof(struct ibmvfc_passthru_fc_iu, response); |
| 3106 | mad->iu.rsp.len = sizeof(mad->fc_iu.response); |
| 3107 | } |
| 3108 | |
| 3109 | /** |
| 3110 | * ibmvfc_tgt_adisc - Initiate an ADISC for specified target |
| 3111 | * @tgt: ibmvfc target struct |
| 3112 | * |
| 3113 | **/ |
| 3114 | static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) |
| 3115 | { |
| 3116 | struct ibmvfc_passthru_mad *mad; |
| 3117 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3118 | struct ibmvfc_event *evt; |
| 3119 | |
| 3120 | if (vhost->discovery_threads >= disc_threads) |
| 3121 | return; |
| 3122 | |
| 3123 | kref_get(&tgt->kref); |
| 3124 | evt = ibmvfc_get_event(vhost); |
| 3125 | vhost->discovery_threads++; |
| 3126 | ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); |
| 3127 | evt->tgt = tgt; |
| 3128 | |
| 3129 | ibmvfc_init_passthru(evt); |
| 3130 | mad = &evt->iu.passthru; |
| 3131 | mad->iu.flags = IBMVFC_FC_ELS; |
| 3132 | mad->iu.scsi_id = tgt->scsi_id; |
| 3133 | |
| 3134 | mad->fc_iu.payload[0] = IBMVFC_ADISC; |
| 3135 | memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
| 3136 | sizeof(vhost->login_buf->resp.port_name)); |
| 3137 | memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, |
| 3138 | sizeof(vhost->login_buf->resp.node_name)); |
| 3139 | mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; |
| 3140 | |
| 3141 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3142 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3143 | vhost->discovery_threads--; |
| 3144 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3145 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3146 | } else |
| 3147 | tgt_dbg(tgt, "Sent ADISC\n"); |
| 3148 | } |
| 3149 | |
| 3150 | /** |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3151 | * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD |
| 3152 | * @evt: ibmvfc event struct |
| 3153 | * |
| 3154 | **/ |
| 3155 | static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) |
| 3156 | { |
| 3157 | struct ibmvfc_target *tgt = evt->tgt; |
| 3158 | struct ibmvfc_host *vhost = evt->vhost; |
| 3159 | struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; |
| 3160 | u32 status = rsp->common.status; |
| 3161 | |
| 3162 | vhost->discovery_threads--; |
| 3163 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3164 | switch (status) { |
| 3165 | case IBMVFC_MAD_SUCCESS: |
| 3166 | tgt_dbg(tgt, "Query Target succeeded\n"); |
| 3167 | tgt->new_scsi_id = rsp->scsi_id; |
| 3168 | if (rsp->scsi_id != tgt->scsi_id) |
| 3169 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
Brian King | 989b854 | 2008-07-22 08:31:47 -0500 | [diff] [blame] | 3170 | else |
| 3171 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3172 | break; |
| 3173 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3174 | break; |
| 3175 | case IBMVFC_MAD_CRQ_ERROR: |
| 3176 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| 3177 | break; |
| 3178 | case IBMVFC_MAD_FAILED: |
| 3179 | default: |
| 3180 | tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| 3181 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| 3182 | ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| 3183 | ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); |
| 3184 | |
| 3185 | if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
| 3186 | rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && |
| 3187 | rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) |
| 3188 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| 3189 | else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 3190 | ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 3191 | else |
| 3192 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3193 | break; |
| 3194 | }; |
| 3195 | |
| 3196 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3197 | ibmvfc_free_event(evt); |
| 3198 | wake_up(&vhost->work_wait_q); |
| 3199 | } |
| 3200 | |
| 3201 | /** |
| 3202 | * ibmvfc_tgt_query_target - Initiate a Query Target for specified target |
| 3203 | * @tgt: ibmvfc target struct |
| 3204 | * |
| 3205 | **/ |
| 3206 | static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) |
| 3207 | { |
| 3208 | struct ibmvfc_query_tgt *query_tgt; |
| 3209 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3210 | struct ibmvfc_event *evt; |
| 3211 | |
| 3212 | if (vhost->discovery_threads >= disc_threads) |
| 3213 | return; |
| 3214 | |
| 3215 | kref_get(&tgt->kref); |
| 3216 | evt = ibmvfc_get_event(vhost); |
| 3217 | vhost->discovery_threads++; |
| 3218 | evt->tgt = tgt; |
| 3219 | ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); |
| 3220 | query_tgt = &evt->iu.query_tgt; |
| 3221 | memset(query_tgt, 0, sizeof(*query_tgt)); |
| 3222 | query_tgt->common.version = 1; |
| 3223 | query_tgt->common.opcode = IBMVFC_QUERY_TARGET; |
| 3224 | query_tgt->common.length = sizeof(*query_tgt); |
| 3225 | query_tgt->wwpn = tgt->ids.port_name; |
| 3226 | |
| 3227 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| 3228 | if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| 3229 | vhost->discovery_threads--; |
| 3230 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3231 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3232 | } else |
| 3233 | tgt_dbg(tgt, "Sent Query Target\n"); |
| 3234 | } |
| 3235 | |
| 3236 | /** |
| 3237 | * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target |
| 3238 | * @vhost: ibmvfc host struct |
| 3239 | * @scsi_id: SCSI ID to allocate target for |
| 3240 | * |
| 3241 | * Returns: |
| 3242 | * 0 on success / other on failure |
| 3243 | **/ |
| 3244 | static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) |
| 3245 | { |
| 3246 | struct ibmvfc_target *tgt; |
| 3247 | unsigned long flags; |
| 3248 | |
| 3249 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3250 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3251 | if (tgt->scsi_id == scsi_id) { |
| 3252 | if (tgt->need_login) |
| 3253 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| 3254 | goto unlock_out; |
| 3255 | } |
| 3256 | } |
| 3257 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3258 | |
| 3259 | tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); |
| 3260 | if (!tgt) { |
Stephen Rothwell | 775a42e | 2009-01-06 14:59:00 +0000 | [diff] [blame] | 3261 | dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3262 | scsi_id); |
| 3263 | return -ENOMEM; |
| 3264 | } |
| 3265 | |
| 3266 | tgt->scsi_id = scsi_id; |
| 3267 | tgt->new_scsi_id = scsi_id; |
| 3268 | tgt->vhost = vhost; |
| 3269 | tgt->need_login = 1; |
| 3270 | kref_init(&tgt->kref); |
| 3271 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| 3272 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3273 | list_add_tail(&tgt->queue, &vhost->targets); |
| 3274 | |
| 3275 | unlock_out: |
| 3276 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3277 | return 0; |
| 3278 | } |
| 3279 | |
| 3280 | /** |
| 3281 | * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets |
| 3282 | * @vhost: ibmvfc host struct |
| 3283 | * |
| 3284 | * Returns: |
| 3285 | * 0 on success / other on failure |
| 3286 | **/ |
| 3287 | static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) |
| 3288 | { |
| 3289 | int i, rc; |
| 3290 | |
| 3291 | for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) |
| 3292 | rc = ibmvfc_alloc_target(vhost, |
| 3293 | vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); |
| 3294 | |
| 3295 | return rc; |
| 3296 | } |
| 3297 | |
| 3298 | /** |
| 3299 | * ibmvfc_discover_targets_done - Completion handler for discover targets MAD |
| 3300 | * @evt: ibmvfc event struct |
| 3301 | * |
| 3302 | **/ |
| 3303 | static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) |
| 3304 | { |
| 3305 | struct ibmvfc_host *vhost = evt->vhost; |
| 3306 | struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; |
| 3307 | u32 mad_status = rsp->common.status; |
| 3308 | |
| 3309 | switch (mad_status) { |
| 3310 | case IBMVFC_MAD_SUCCESS: |
| 3311 | ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); |
| 3312 | vhost->num_targets = rsp->num_written; |
| 3313 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
| 3314 | break; |
| 3315 | case IBMVFC_MAD_FAILED: |
| 3316 | dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", |
| 3317 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| 3318 | ibmvfc_retry_host_init(vhost); |
| 3319 | break; |
| 3320 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3321 | break; |
| 3322 | default: |
| 3323 | dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); |
| 3324 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3325 | break; |
| 3326 | } |
| 3327 | |
| 3328 | ibmvfc_free_event(evt); |
| 3329 | wake_up(&vhost->work_wait_q); |
| 3330 | } |
| 3331 | |
| 3332 | /** |
| 3333 | * ibmvfc_discover_targets - Send Discover Targets MAD |
| 3334 | * @vhost: ibmvfc host struct |
| 3335 | * |
| 3336 | **/ |
| 3337 | static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) |
| 3338 | { |
| 3339 | struct ibmvfc_discover_targets *mad; |
| 3340 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| 3341 | |
| 3342 | ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); |
| 3343 | mad = &evt->iu.discover_targets; |
| 3344 | memset(mad, 0, sizeof(*mad)); |
| 3345 | mad->common.version = 1; |
| 3346 | mad->common.opcode = IBMVFC_DISC_TARGETS; |
| 3347 | mad->common.length = sizeof(*mad); |
| 3348 | mad->bufflen = vhost->disc_buf_sz; |
| 3349 | mad->buffer.va = vhost->disc_buf_dma; |
| 3350 | mad->buffer.len = vhost->disc_buf_sz; |
| 3351 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| 3352 | |
| 3353 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| 3354 | ibmvfc_dbg(vhost, "Sent discover targets\n"); |
| 3355 | else |
| 3356 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3357 | } |
| 3358 | |
| 3359 | /** |
| 3360 | * ibmvfc_npiv_login_done - Completion handler for NPIV Login |
| 3361 | * @evt: ibmvfc event struct |
| 3362 | * |
| 3363 | **/ |
| 3364 | static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) |
| 3365 | { |
| 3366 | struct ibmvfc_host *vhost = evt->vhost; |
| 3367 | u32 mad_status = evt->xfer_iu->npiv_login.common.status; |
| 3368 | struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
| 3369 | unsigned int npiv_max_sectors; |
| 3370 | |
| 3371 | switch (mad_status) { |
| 3372 | case IBMVFC_MAD_SUCCESS: |
| 3373 | ibmvfc_free_event(evt); |
| 3374 | break; |
| 3375 | case IBMVFC_MAD_FAILED: |
| 3376 | dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", |
| 3377 | ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| 3378 | if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| 3379 | ibmvfc_retry_host_init(vhost); |
| 3380 | else |
| 3381 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3382 | ibmvfc_free_event(evt); |
| 3383 | return; |
| 3384 | case IBMVFC_MAD_CRQ_ERROR: |
| 3385 | ibmvfc_retry_host_init(vhost); |
| 3386 | case IBMVFC_MAD_DRIVER_FAILED: |
| 3387 | ibmvfc_free_event(evt); |
| 3388 | return; |
| 3389 | default: |
| 3390 | dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); |
| 3391 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3392 | ibmvfc_free_event(evt); |
| 3393 | return; |
| 3394 | } |
| 3395 | |
| 3396 | vhost->client_migrated = 0; |
| 3397 | |
| 3398 | if (!(rsp->flags & IBMVFC_NATIVE_FC)) { |
| 3399 | dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
| 3400 | rsp->flags); |
| 3401 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3402 | wake_up(&vhost->work_wait_q); |
| 3403 | return; |
| 3404 | } |
| 3405 | |
| 3406 | if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { |
| 3407 | dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
| 3408 | rsp->max_cmds); |
| 3409 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3410 | wake_up(&vhost->work_wait_q); |
| 3411 | return; |
| 3412 | } |
| 3413 | |
| 3414 | npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); |
| 3415 | dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
| 3416 | rsp->partition_name, rsp->device_name, rsp->port_loc_code, |
| 3417 | rsp->drc_name, npiv_max_sectors); |
| 3418 | |
| 3419 | fc_host_fabric_name(vhost->host) = rsp->node_name; |
| 3420 | fc_host_node_name(vhost->host) = rsp->node_name; |
| 3421 | fc_host_port_name(vhost->host) = rsp->port_name; |
| 3422 | fc_host_port_id(vhost->host) = rsp->scsi_id; |
| 3423 | fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
| 3424 | fc_host_supported_classes(vhost->host) = 0; |
| 3425 | if (rsp->service_parms.class1_parms[0] & 0x80000000) |
| 3426 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
| 3427 | if (rsp->service_parms.class2_parms[0] & 0x80000000) |
| 3428 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
| 3429 | if (rsp->service_parms.class3_parms[0] & 0x80000000) |
| 3430 | fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
| 3431 | fc_host_maxframe_size(vhost->host) = |
| 3432 | rsp->service_parms.common.bb_rcv_sz & 0x0fff; |
| 3433 | |
| 3434 | vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; |
| 3435 | vhost->host->max_sectors = npiv_max_sectors; |
| 3436 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 3437 | wake_up(&vhost->work_wait_q); |
| 3438 | } |
| 3439 | |
| 3440 | /** |
| 3441 | * ibmvfc_npiv_login - Sends NPIV login |
| 3442 | * @vhost: ibmvfc host struct |
| 3443 | * |
| 3444 | **/ |
| 3445 | static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) |
| 3446 | { |
| 3447 | struct ibmvfc_npiv_login_mad *mad; |
| 3448 | struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| 3449 | |
| 3450 | ibmvfc_gather_partition_info(vhost); |
| 3451 | ibmvfc_set_login_info(vhost); |
| 3452 | ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); |
| 3453 | |
| 3454 | memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); |
| 3455 | mad = &evt->iu.npiv_login; |
| 3456 | memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); |
| 3457 | mad->common.version = 1; |
| 3458 | mad->common.opcode = IBMVFC_NPIV_LOGIN; |
| 3459 | mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); |
| 3460 | mad->buffer.va = vhost->login_buf_dma; |
| 3461 | mad->buffer.len = sizeof(*vhost->login_buf); |
| 3462 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3463 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| 3464 | |
| 3465 | if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| 3466 | ibmvfc_dbg(vhost, "Sent NPIV login\n"); |
| 3467 | else |
| 3468 | ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| 3469 | }; |
| 3470 | |
| 3471 | /** |
| 3472 | * ibmvfc_dev_init_to_do - Is there target initialization work to do? |
| 3473 | * @vhost: ibmvfc host struct |
| 3474 | * |
| 3475 | * Returns: |
| 3476 | * 1 if work to do / 0 if not |
| 3477 | **/ |
| 3478 | static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) |
| 3479 | { |
| 3480 | struct ibmvfc_target *tgt; |
| 3481 | |
| 3482 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3483 | if (tgt->action == IBMVFC_TGT_ACTION_INIT || |
| 3484 | tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| 3485 | return 1; |
| 3486 | } |
| 3487 | |
| 3488 | return 0; |
| 3489 | } |
| 3490 | |
| 3491 | /** |
| 3492 | * __ibmvfc_work_to_do - Is there task level work to do? (no locking) |
| 3493 | * @vhost: ibmvfc host struct |
| 3494 | * |
| 3495 | * Returns: |
| 3496 | * 1 if work to do / 0 if not |
| 3497 | **/ |
| 3498 | static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| 3499 | { |
| 3500 | struct ibmvfc_target *tgt; |
| 3501 | |
| 3502 | if (kthread_should_stop()) |
| 3503 | return 1; |
| 3504 | switch (vhost->action) { |
| 3505 | case IBMVFC_HOST_ACTION_NONE: |
| 3506 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 3507 | return 0; |
| 3508 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 3509 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 3510 | if (vhost->discovery_threads == disc_threads) |
| 3511 | return 0; |
| 3512 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3513 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) |
| 3514 | return 1; |
| 3515 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3516 | if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| 3517 | return 0; |
| 3518 | return 1; |
| 3519 | case IBMVFC_HOST_ACTION_INIT: |
| 3520 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 3521 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 3522 | case IBMVFC_HOST_ACTION_TGT_DEL: |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 3523 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3524 | case IBMVFC_HOST_ACTION_QUERY: |
| 3525 | default: |
| 3526 | break; |
| 3527 | }; |
| 3528 | |
| 3529 | return 1; |
| 3530 | } |
| 3531 | |
| 3532 | /** |
| 3533 | * ibmvfc_work_to_do - Is there task level work to do? |
| 3534 | * @vhost: ibmvfc host struct |
| 3535 | * |
| 3536 | * Returns: |
| 3537 | * 1 if work to do / 0 if not |
| 3538 | **/ |
| 3539 | static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| 3540 | { |
| 3541 | unsigned long flags; |
| 3542 | int rc; |
| 3543 | |
| 3544 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3545 | rc = __ibmvfc_work_to_do(vhost); |
| 3546 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3547 | return rc; |
| 3548 | } |
| 3549 | |
| 3550 | /** |
| 3551 | * ibmvfc_log_ae - Log async events if necessary |
| 3552 | * @vhost: ibmvfc host struct |
| 3553 | * @events: events to log |
| 3554 | * |
| 3555 | **/ |
| 3556 | static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) |
| 3557 | { |
| 3558 | if (events & IBMVFC_AE_RSCN) |
| 3559 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); |
| 3560 | if ((events & IBMVFC_AE_LINKDOWN) && |
| 3561 | vhost->state >= IBMVFC_HALTED) |
| 3562 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); |
| 3563 | if ((events & IBMVFC_AE_LINKUP) && |
| 3564 | vhost->state == IBMVFC_INITIALIZING) |
| 3565 | fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); |
| 3566 | } |
| 3567 | |
| 3568 | /** |
| 3569 | * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port |
| 3570 | * @tgt: ibmvfc target struct |
| 3571 | * |
| 3572 | **/ |
| 3573 | static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) |
| 3574 | { |
| 3575 | struct ibmvfc_host *vhost = tgt->vhost; |
| 3576 | struct fc_rport *rport; |
| 3577 | unsigned long flags; |
| 3578 | |
| 3579 | tgt_dbg(tgt, "Adding rport\n"); |
| 3580 | rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); |
| 3581 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3582 | tgt->rport = rport; |
| 3583 | ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| 3584 | if (rport) { |
| 3585 | tgt_dbg(tgt, "rport add succeeded\n"); |
| 3586 | rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; |
| 3587 | rport->supported_classes = 0; |
Brian King | 52d7e86 | 2008-07-22 08:31:46 -0500 | [diff] [blame] | 3588 | tgt->target_id = rport->scsi_target_id; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3589 | if (tgt->service_parms.class1_parms[0] & 0x80000000) |
| 3590 | rport->supported_classes |= FC_COS_CLASS1; |
| 3591 | if (tgt->service_parms.class2_parms[0] & 0x80000000) |
| 3592 | rport->supported_classes |= FC_COS_CLASS2; |
| 3593 | if (tgt->service_parms.class3_parms[0] & 0x80000000) |
| 3594 | rport->supported_classes |= FC_COS_CLASS3; |
| 3595 | } else |
| 3596 | tgt_dbg(tgt, "rport add failed\n"); |
| 3597 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3598 | } |
| 3599 | |
| 3600 | /** |
| 3601 | * ibmvfc_do_work - Do task level work |
| 3602 | * @vhost: ibmvfc host struct |
| 3603 | * |
| 3604 | **/ |
| 3605 | static void ibmvfc_do_work(struct ibmvfc_host *vhost) |
| 3606 | { |
| 3607 | struct ibmvfc_target *tgt; |
| 3608 | unsigned long flags; |
| 3609 | struct fc_rport *rport; |
| 3610 | |
| 3611 | ibmvfc_log_ae(vhost, vhost->events_to_log); |
| 3612 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3613 | vhost->events_to_log = 0; |
| 3614 | switch (vhost->action) { |
| 3615 | case IBMVFC_HOST_ACTION_NONE: |
| 3616 | case IBMVFC_HOST_ACTION_INIT_WAIT: |
| 3617 | break; |
| 3618 | case IBMVFC_HOST_ACTION_INIT: |
| 3619 | BUG_ON(vhost->state != IBMVFC_INITIALIZING); |
Brian King | 1c41fa82 | 2008-12-03 11:02:54 -0600 | [diff] [blame] | 3620 | if (vhost->delay_init) { |
| 3621 | vhost->delay_init = 0; |
| 3622 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
Brian King | d2131b3 | 2008-12-18 09:26:51 -0600 | [diff] [blame] | 3623 | ssleep(15); |
Brian King | 1c41fa82 | 2008-12-03 11:02:54 -0600 | [diff] [blame] | 3624 | return; |
| 3625 | } else |
| 3626 | vhost->job_step(vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3627 | break; |
| 3628 | case IBMVFC_HOST_ACTION_QUERY: |
| 3629 | list_for_each_entry(tgt, &vhost->targets, queue) |
| 3630 | ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); |
| 3631 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); |
| 3632 | break; |
| 3633 | case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| 3634 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3635 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| 3636 | tgt->job_step(tgt); |
| 3637 | break; |
| 3638 | } |
| 3639 | } |
| 3640 | |
| 3641 | if (!ibmvfc_dev_init_to_do(vhost)) |
| 3642 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| 3643 | break; |
| 3644 | case IBMVFC_HOST_ACTION_TGT_DEL: |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 3645 | case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3646 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3647 | if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| 3648 | tgt_dbg(tgt, "Deleting rport\n"); |
| 3649 | rport = tgt->rport; |
| 3650 | tgt->rport = NULL; |
| 3651 | list_del(&tgt->queue); |
| 3652 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3653 | if (rport) |
| 3654 | fc_remote_port_delete(rport); |
| 3655 | kref_put(&tgt->kref, ibmvfc_release_tgt); |
| 3656 | return; |
| 3657 | } |
| 3658 | } |
| 3659 | |
| 3660 | if (vhost->state == IBMVFC_INITIALIZING) { |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 3661 | if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { |
| 3662 | ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); |
| 3663 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); |
| 3664 | vhost->init_retries = 0; |
| 3665 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3666 | scsi_unblock_requests(vhost->host); |
| 3667 | return; |
| 3668 | } else { |
| 3669 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| 3670 | vhost->job_step = ibmvfc_discover_targets; |
| 3671 | } |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3672 | } else { |
| 3673 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 3674 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3675 | scsi_unblock_requests(vhost->host); |
| 3676 | wake_up(&vhost->init_wait_q); |
| 3677 | return; |
| 3678 | } |
| 3679 | break; |
| 3680 | case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| 3681 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); |
| 3682 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3683 | ibmvfc_alloc_targets(vhost); |
| 3684 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 3685 | break; |
| 3686 | case IBMVFC_HOST_ACTION_TGT_INIT: |
| 3687 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3688 | if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| 3689 | tgt->job_step(tgt); |
| 3690 | break; |
| 3691 | } |
| 3692 | } |
| 3693 | |
Brian King | 10e7949 | 2008-10-29 08:46:45 -0500 | [diff] [blame] | 3694 | if (!ibmvfc_dev_init_to_do(vhost)) |
| 3695 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3696 | break; |
| 3697 | case IBMVFC_HOST_ACTION_TGT_ADD: |
| 3698 | list_for_each_entry(tgt, &vhost->targets, queue) { |
| 3699 | if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { |
| 3700 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3701 | ibmvfc_tgt_add_rport(tgt); |
| 3702 | return; |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3703 | } |
| 3704 | } |
| 3705 | |
Brian King | 915be02 | 2008-08-15 10:59:22 -0500 | [diff] [blame] | 3706 | if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3707 | vhost->reinit = 0; |
Brian King | 915be02 | 2008-08-15 10:59:22 -0500 | [diff] [blame] | 3708 | scsi_block_requests(vhost->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3709 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| 3710 | } else { |
| 3711 | ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| 3712 | wake_up(&vhost->init_wait_q); |
| 3713 | } |
| 3714 | break; |
| 3715 | default: |
| 3716 | break; |
| 3717 | }; |
| 3718 | |
| 3719 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 3720 | } |
| 3721 | |
| 3722 | /** |
| 3723 | * ibmvfc_work - Do task level work |
| 3724 | * @data: ibmvfc host struct |
| 3725 | * |
| 3726 | * Returns: |
| 3727 | * zero |
| 3728 | **/ |
| 3729 | static int ibmvfc_work(void *data) |
| 3730 | { |
| 3731 | struct ibmvfc_host *vhost = data; |
| 3732 | int rc; |
| 3733 | |
| 3734 | set_user_nice(current, -20); |
| 3735 | |
| 3736 | while (1) { |
| 3737 | rc = wait_event_interruptible(vhost->work_wait_q, |
| 3738 | ibmvfc_work_to_do(vhost)); |
| 3739 | |
| 3740 | BUG_ON(rc); |
| 3741 | |
| 3742 | if (kthread_should_stop()) |
| 3743 | break; |
| 3744 | |
| 3745 | ibmvfc_do_work(vhost); |
| 3746 | } |
| 3747 | |
| 3748 | ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); |
| 3749 | return 0; |
| 3750 | } |
| 3751 | |
| 3752 | /** |
| 3753 | * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor |
| 3754 | * @vhost: ibmvfc host struct |
| 3755 | * |
| 3756 | * Allocates a page for messages, maps it for dma, and registers |
| 3757 | * the crq with the hypervisor. |
| 3758 | * |
| 3759 | * Return value: |
| 3760 | * zero on success / other on failure |
| 3761 | **/ |
| 3762 | static int ibmvfc_init_crq(struct ibmvfc_host *vhost) |
| 3763 | { |
| 3764 | int rc, retrc = -ENOMEM; |
| 3765 | struct device *dev = vhost->dev; |
| 3766 | struct vio_dev *vdev = to_vio_dev(dev); |
| 3767 | struct ibmvfc_crq_queue *crq = &vhost->crq; |
| 3768 | |
| 3769 | ENTER; |
| 3770 | crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); |
| 3771 | |
| 3772 | if (!crq->msgs) |
| 3773 | return -ENOMEM; |
| 3774 | |
| 3775 | crq->size = PAGE_SIZE / sizeof(*crq->msgs); |
| 3776 | crq->msg_token = dma_map_single(dev, crq->msgs, |
| 3777 | PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 3778 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 3779 | if (dma_mapping_error(dev, crq->msg_token)) |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3780 | goto map_failed; |
| 3781 | |
| 3782 | retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| 3783 | crq->msg_token, PAGE_SIZE); |
| 3784 | |
| 3785 | if (rc == H_RESOURCE) |
| 3786 | /* maybe kexecing and resource is busy. try a reset */ |
| 3787 | retrc = rc = ibmvfc_reset_crq(vhost); |
| 3788 | |
| 3789 | if (rc == H_CLOSED) |
| 3790 | dev_warn(dev, "Partner adapter not ready\n"); |
| 3791 | else if (rc) { |
| 3792 | dev_warn(dev, "Error %d opening adapter\n", rc); |
| 3793 | goto reg_crq_failed; |
| 3794 | } |
| 3795 | |
| 3796 | retrc = 0; |
| 3797 | |
| 3798 | if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
| 3799 | dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); |
| 3800 | goto req_irq_failed; |
| 3801 | } |
| 3802 | |
| 3803 | if ((rc = vio_enable_interrupts(vdev))) { |
| 3804 | dev_err(dev, "Error %d enabling interrupts\n", rc); |
| 3805 | goto req_irq_failed; |
| 3806 | } |
| 3807 | |
| 3808 | crq->cur = 0; |
| 3809 | LEAVE; |
| 3810 | return retrc; |
| 3811 | |
| 3812 | req_irq_failed: |
| 3813 | do { |
| 3814 | rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| 3815 | } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| 3816 | reg_crq_failed: |
| 3817 | dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| 3818 | map_failed: |
| 3819 | free_page((unsigned long)crq->msgs); |
| 3820 | return retrc; |
| 3821 | } |
| 3822 | |
| 3823 | /** |
| 3824 | * ibmvfc_free_mem - Free memory for vhost |
| 3825 | * @vhost: ibmvfc host struct |
| 3826 | * |
| 3827 | * Return value: |
| 3828 | * none |
| 3829 | **/ |
| 3830 | static void ibmvfc_free_mem(struct ibmvfc_host *vhost) |
| 3831 | { |
| 3832 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| 3833 | |
| 3834 | ENTER; |
| 3835 | mempool_destroy(vhost->tgt_pool); |
| 3836 | kfree(vhost->trace); |
| 3837 | dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, |
| 3838 | vhost->disc_buf_dma); |
| 3839 | dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), |
| 3840 | vhost->login_buf, vhost->login_buf_dma); |
| 3841 | dma_pool_destroy(vhost->sg_pool); |
| 3842 | dma_unmap_single(vhost->dev, async_q->msg_token, |
| 3843 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| 3844 | free_page((unsigned long)async_q->msgs); |
| 3845 | LEAVE; |
| 3846 | } |
| 3847 | |
| 3848 | /** |
| 3849 | * ibmvfc_alloc_mem - Allocate memory for vhost |
| 3850 | * @vhost: ibmvfc host struct |
| 3851 | * |
| 3852 | * Return value: |
| 3853 | * 0 on success / non-zero on failure |
| 3854 | **/ |
| 3855 | static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) |
| 3856 | { |
| 3857 | struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| 3858 | struct device *dev = vhost->dev; |
| 3859 | |
| 3860 | ENTER; |
| 3861 | async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); |
| 3862 | if (!async_q->msgs) { |
| 3863 | dev_err(dev, "Couldn't allocate async queue.\n"); |
| 3864 | goto nomem; |
| 3865 | } |
| 3866 | |
| 3867 | async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); |
| 3868 | async_q->msg_token = dma_map_single(dev, async_q->msgs, |
| 3869 | async_q->size * sizeof(*async_q->msgs), |
| 3870 | DMA_BIDIRECTIONAL); |
| 3871 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 3872 | if (dma_mapping_error(dev, async_q->msg_token)) { |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 3873 | dev_err(dev, "Failed to map async queue\n"); |
| 3874 | goto free_async_crq; |
| 3875 | } |
| 3876 | |
| 3877 | vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, |
| 3878 | SG_ALL * sizeof(struct srp_direct_buf), |
| 3879 | sizeof(struct srp_direct_buf), 0); |
| 3880 | |
| 3881 | if (!vhost->sg_pool) { |
| 3882 | dev_err(dev, "Failed to allocate sg pool\n"); |
| 3883 | goto unmap_async_crq; |
| 3884 | } |
| 3885 | |
| 3886 | vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), |
| 3887 | &vhost->login_buf_dma, GFP_KERNEL); |
| 3888 | |
| 3889 | if (!vhost->login_buf) { |
| 3890 | dev_err(dev, "Couldn't allocate NPIV login buffer\n"); |
| 3891 | goto free_sg_pool; |
| 3892 | } |
| 3893 | |
| 3894 | vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; |
| 3895 | vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, |
| 3896 | &vhost->disc_buf_dma, GFP_KERNEL); |
| 3897 | |
| 3898 | if (!vhost->disc_buf) { |
| 3899 | dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); |
| 3900 | goto free_login_buffer; |
| 3901 | } |
| 3902 | |
| 3903 | vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, |
| 3904 | sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); |
| 3905 | |
| 3906 | if (!vhost->trace) |
| 3907 | goto free_disc_buffer; |
| 3908 | |
| 3909 | vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
| 3910 | sizeof(struct ibmvfc_target)); |
| 3911 | |
| 3912 | if (!vhost->tgt_pool) { |
| 3913 | dev_err(dev, "Couldn't allocate target memory pool\n"); |
| 3914 | goto free_trace; |
| 3915 | } |
| 3916 | |
| 3917 | LEAVE; |
| 3918 | return 0; |
| 3919 | |
| 3920 | free_trace: |
| 3921 | kfree(vhost->trace); |
| 3922 | free_disc_buffer: |
| 3923 | dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, |
| 3924 | vhost->disc_buf_dma); |
| 3925 | free_login_buffer: |
| 3926 | dma_free_coherent(dev, sizeof(*vhost->login_buf), |
| 3927 | vhost->login_buf, vhost->login_buf_dma); |
| 3928 | free_sg_pool: |
| 3929 | dma_pool_destroy(vhost->sg_pool); |
| 3930 | unmap_async_crq: |
| 3931 | dma_unmap_single(dev, async_q->msg_token, |
| 3932 | async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| 3933 | free_async_crq: |
| 3934 | free_page((unsigned long)async_q->msgs); |
| 3935 | nomem: |
| 3936 | LEAVE; |
| 3937 | return -ENOMEM; |
| 3938 | } |
| 3939 | |
| 3940 | /** |
| 3941 | * ibmvfc_probe - Adapter hot plug add entry point |
| 3942 | * @vdev: vio device struct |
| 3943 | * @id: vio device id struct |
| 3944 | * |
| 3945 | * Return value: |
| 3946 | * 0 on success / non-zero on failure |
| 3947 | **/ |
| 3948 | static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| 3949 | { |
| 3950 | struct ibmvfc_host *vhost; |
| 3951 | struct Scsi_Host *shost; |
| 3952 | struct device *dev = &vdev->dev; |
| 3953 | int rc = -ENOMEM; |
| 3954 | |
| 3955 | ENTER; |
| 3956 | shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); |
| 3957 | if (!shost) { |
| 3958 | dev_err(dev, "Couldn't allocate host data\n"); |
| 3959 | goto out; |
| 3960 | } |
| 3961 | |
| 3962 | shost->transportt = ibmvfc_transport_template; |
| 3963 | shost->can_queue = max_requests; |
| 3964 | shost->max_lun = max_lun; |
| 3965 | shost->max_id = max_targets; |
| 3966 | shost->max_sectors = IBMVFC_MAX_SECTORS; |
| 3967 | shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; |
| 3968 | shost->unique_id = shost->host_no; |
| 3969 | |
| 3970 | vhost = shost_priv(shost); |
| 3971 | INIT_LIST_HEAD(&vhost->sent); |
| 3972 | INIT_LIST_HEAD(&vhost->free); |
| 3973 | INIT_LIST_HEAD(&vhost->targets); |
| 3974 | sprintf(vhost->name, IBMVFC_NAME); |
| 3975 | vhost->host = shost; |
| 3976 | vhost->dev = dev; |
| 3977 | vhost->partition_number = -1; |
| 3978 | vhost->log_level = log_level; |
| 3979 | strcpy(vhost->partition_name, "UNKNOWN"); |
| 3980 | init_waitqueue_head(&vhost->work_wait_q); |
| 3981 | init_waitqueue_head(&vhost->init_wait_q); |
| 3982 | |
| 3983 | if ((rc = ibmvfc_alloc_mem(vhost))) |
| 3984 | goto free_scsi_host; |
| 3985 | |
| 3986 | vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, |
| 3987 | shost->host_no); |
| 3988 | |
| 3989 | if (IS_ERR(vhost->work_thread)) { |
| 3990 | dev_err(dev, "Couldn't create kernel thread: %ld\n", |
| 3991 | PTR_ERR(vhost->work_thread)); |
| 3992 | goto free_host_mem; |
| 3993 | } |
| 3994 | |
| 3995 | if ((rc = ibmvfc_init_crq(vhost))) { |
| 3996 | dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); |
| 3997 | goto kill_kthread; |
| 3998 | } |
| 3999 | |
| 4000 | if ((rc = ibmvfc_init_event_pool(vhost))) { |
| 4001 | dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); |
| 4002 | goto release_crq; |
| 4003 | } |
| 4004 | |
| 4005 | if ((rc = scsi_add_host(shost, dev))) |
| 4006 | goto release_event_pool; |
| 4007 | |
| 4008 | if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
| 4009 | &ibmvfc_trace_attr))) { |
| 4010 | dev_err(dev, "Failed to create trace file. rc=%d\n", rc); |
| 4011 | goto remove_shost; |
| 4012 | } |
| 4013 | |
| 4014 | dev_set_drvdata(dev, vhost); |
| 4015 | spin_lock(&ibmvfc_driver_lock); |
| 4016 | list_add_tail(&vhost->queue, &ibmvfc_head); |
| 4017 | spin_unlock(&ibmvfc_driver_lock); |
| 4018 | |
| 4019 | ibmvfc_send_crq_init(vhost); |
| 4020 | scsi_scan_host(shost); |
| 4021 | return 0; |
| 4022 | |
| 4023 | remove_shost: |
| 4024 | scsi_remove_host(shost); |
| 4025 | release_event_pool: |
| 4026 | ibmvfc_free_event_pool(vhost); |
| 4027 | release_crq: |
| 4028 | ibmvfc_release_crq_queue(vhost); |
| 4029 | kill_kthread: |
| 4030 | kthread_stop(vhost->work_thread); |
| 4031 | free_host_mem: |
| 4032 | ibmvfc_free_mem(vhost); |
| 4033 | free_scsi_host: |
| 4034 | scsi_host_put(shost); |
| 4035 | out: |
| 4036 | LEAVE; |
| 4037 | return rc; |
| 4038 | } |
| 4039 | |
| 4040 | /** |
| 4041 | * ibmvfc_remove - Adapter hot plug remove entry point |
| 4042 | * @vdev: vio device struct |
| 4043 | * |
| 4044 | * Return value: |
| 4045 | * 0 |
| 4046 | **/ |
| 4047 | static int ibmvfc_remove(struct vio_dev *vdev) |
| 4048 | { |
| 4049 | struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); |
| 4050 | unsigned long flags; |
| 4051 | |
| 4052 | ENTER; |
| 4053 | ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); |
Brian King | 2d0da2a | 2008-07-22 08:31:42 -0500 | [diff] [blame] | 4054 | ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| 4055 | ibmvfc_wait_while_resetting(vhost); |
| 4056 | ibmvfc_release_crq_queue(vhost); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 4057 | kthread_stop(vhost->work_thread); |
| 4058 | fc_remove_host(vhost->host); |
| 4059 | scsi_remove_host(vhost->host); |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 4060 | |
| 4061 | spin_lock_irqsave(vhost->host->host_lock, flags); |
| 4062 | ibmvfc_purge_requests(vhost, DID_ERROR); |
| 4063 | ibmvfc_free_event_pool(vhost); |
| 4064 | spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| 4065 | |
| 4066 | ibmvfc_free_mem(vhost); |
| 4067 | spin_lock(&ibmvfc_driver_lock); |
| 4068 | list_del(&vhost->queue); |
| 4069 | spin_unlock(&ibmvfc_driver_lock); |
| 4070 | scsi_host_put(vhost->host); |
| 4071 | LEAVE; |
| 4072 | return 0; |
| 4073 | } |
| 4074 | |
Brian King | 39c1ffe | 2008-07-24 04:35:48 +1000 | [diff] [blame] | 4075 | /** |
| 4076 | * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver |
| 4077 | * @vdev: vio device struct |
| 4078 | * |
| 4079 | * Return value: |
| 4080 | * Number of bytes the driver will need to DMA map at the same time in |
| 4081 | * order to perform well. |
| 4082 | */ |
| 4083 | static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) |
| 4084 | { |
| 4085 | unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); |
| 4086 | return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); |
| 4087 | } |
| 4088 | |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 4089 | static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
| 4090 | {"fcp", "IBM,vfc-client"}, |
| 4091 | { "", "" } |
| 4092 | }; |
| 4093 | MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); |
| 4094 | |
| 4095 | static struct vio_driver ibmvfc_driver = { |
| 4096 | .id_table = ibmvfc_device_table, |
| 4097 | .probe = ibmvfc_probe, |
| 4098 | .remove = ibmvfc_remove, |
Brian King | 39c1ffe | 2008-07-24 04:35:48 +1000 | [diff] [blame] | 4099 | .get_desired_dma = ibmvfc_get_desired_dma, |
Brian King | 072b91f | 2008-07-01 13:14:30 -0500 | [diff] [blame] | 4100 | .driver = { |
| 4101 | .name = IBMVFC_NAME, |
| 4102 | .owner = THIS_MODULE, |
| 4103 | } |
| 4104 | }; |
| 4105 | |
| 4106 | static struct fc_function_template ibmvfc_transport_functions = { |
| 4107 | .show_host_fabric_name = 1, |
| 4108 | .show_host_node_name = 1, |
| 4109 | .show_host_port_name = 1, |
| 4110 | .show_host_supported_classes = 1, |
| 4111 | .show_host_port_type = 1, |
| 4112 | .show_host_port_id = 1, |
| 4113 | |
| 4114 | .get_host_port_state = ibmvfc_get_host_port_state, |
| 4115 | .show_host_port_state = 1, |
| 4116 | |
| 4117 | .get_host_speed = ibmvfc_get_host_speed, |
| 4118 | .show_host_speed = 1, |
| 4119 | |
| 4120 | .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, |
| 4121 | .terminate_rport_io = ibmvfc_terminate_rport_io, |
| 4122 | |
| 4123 | .show_rport_maxframe_size = 1, |
| 4124 | .show_rport_supported_classes = 1, |
| 4125 | |
| 4126 | .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, |
| 4127 | .show_rport_dev_loss_tmo = 1, |
| 4128 | |
| 4129 | .get_starget_node_name = ibmvfc_get_starget_node_name, |
| 4130 | .show_starget_node_name = 1, |
| 4131 | |
| 4132 | .get_starget_port_name = ibmvfc_get_starget_port_name, |
| 4133 | .show_starget_port_name = 1, |
| 4134 | |
| 4135 | .get_starget_port_id = ibmvfc_get_starget_port_id, |
| 4136 | .show_starget_port_id = 1, |
| 4137 | }; |
| 4138 | |
| 4139 | /** |
| 4140 | * ibmvfc_module_init - Initialize the ibmvfc module |
| 4141 | * |
| 4142 | * Return value: |
| 4143 | * 0 on success / other on failure |
| 4144 | **/ |
| 4145 | static int __init ibmvfc_module_init(void) |
| 4146 | { |
| 4147 | int rc; |
| 4148 | |
| 4149 | if (!firmware_has_feature(FW_FEATURE_VIO)) |
| 4150 | return -ENODEV; |
| 4151 | |
| 4152 | printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", |
| 4153 | IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); |
| 4154 | |
| 4155 | ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); |
| 4156 | if (!ibmvfc_transport_template) |
| 4157 | return -ENOMEM; |
| 4158 | |
| 4159 | rc = vio_register_driver(&ibmvfc_driver); |
| 4160 | if (rc) |
| 4161 | fc_release_transport(ibmvfc_transport_template); |
| 4162 | return rc; |
| 4163 | } |
| 4164 | |
| 4165 | /** |
| 4166 | * ibmvfc_module_exit - Teardown the ibmvfc module |
| 4167 | * |
| 4168 | * Return value: |
| 4169 | * nothing |
| 4170 | **/ |
| 4171 | static void __exit ibmvfc_module_exit(void) |
| 4172 | { |
| 4173 | vio_unregister_driver(&ibmvfc_driver); |
| 4174 | fc_release_transport(ibmvfc_transport_template); |
| 4175 | } |
| 4176 | |
| 4177 | module_init(ibmvfc_module_init); |
| 4178 | module_exit(ibmvfc_module_exit); |