| /* |
| * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter |
| * |
| * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation |
| * |
| * Copyright (C) IBM Corporation, 2008 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/dmapool.h> |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/kthread.h> |
| #include <linux/of.h> |
| #include <linux/stringify.h> |
| #include <asm/firmware.h> |
| #include <asm/irq.h> |
| #include <asm/vio.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_transport_fc.h> |
| #include "ibmvfc.h" |
| |
| static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; |
| static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; |
| static unsigned int max_lun = IBMVFC_MAX_LUN; |
| static unsigned int max_targets = IBMVFC_MAX_TARGETS; |
| static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; |
| static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; |
| static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; |
| static unsigned int ibmvfc_debug = IBMVFC_DEBUG; |
| static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; |
| static LIST_HEAD(ibmvfc_head); |
| static DEFINE_SPINLOCK(ibmvfc_driver_lock); |
| static struct scsi_transport_template *ibmvfc_transport_template; |
| |
| MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); |
| MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(IBMVFC_DRIVER_VERSION); |
| |
| module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " |
| "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); |
| module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(default_timeout, |
| "Default timeout in seconds for initialization and EH commands. " |
| "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); |
| module_param_named(max_requests, max_requests, uint, S_IRUGO); |
| MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " |
| "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); |
| module_param_named(max_lun, max_lun, uint, S_IRUGO); |
| MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " |
| "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); |
| module_param_named(max_targets, max_targets, uint, S_IRUGO); |
| MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " |
| "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); |
| module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " |
| "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); |
| module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Enable driver debug information. " |
| "[Default=" __stringify(IBMVFC_DEBUG) "]"); |
| module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " |
| "transport should insulate the loss of a remote port. Once this " |
| "value is exceeded, the scsi target is removed. " |
| "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); |
| module_param_named(log_level, log_level, uint, 0); |
| MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " |
| "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); |
| |
| static const struct { |
| u16 status; |
| u16 error; |
| u8 result; |
| u8 retry; |
| int log; |
| char *name; |
| } cmd_status [] = { |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_NO_CONNECT, 1, 1, "network down" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, |
| { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, |
| |
| { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ABORT, 0, 1, "invalid parameter" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 0, 1, "missing parameter" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ABORT, 0, 1, "transaction cancelled" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, |
| { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, |
| |
| { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, |
| { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, |
| |
| { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, |
| }; |
| |
| static void ibmvfc_npiv_login(struct ibmvfc_host *); |
| static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); |
| static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); |
| static void ibmvfc_tgt_query_target(struct ibmvfc_target *); |
| |
| static const char *unknown_error = "unknown error"; |
| |
| #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| /** |
| * ibmvfc_trc_start - Log a start trace entry |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_trc_start(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; |
| struct ibmvfc_mad_common *mad = &evt->iu.mad_common; |
| struct ibmvfc_trace_entry *entry; |
| |
| entry = &vhost->trace[vhost->trace_index++]; |
| entry->evt = evt; |
| entry->time = jiffies; |
| entry->fmt = evt->crq.format; |
| entry->type = IBMVFC_TRC_START; |
| |
| switch (entry->fmt) { |
| case IBMVFC_CMD_FORMAT: |
| entry->op_code = vfc_cmd->iu.cdb[0]; |
| entry->scsi_id = vfc_cmd->tgt_scsi_id; |
| entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
| entry->tmf_flags = vfc_cmd->iu.tmf_flags; |
| entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; |
| break; |
| case IBMVFC_MAD_FORMAT: |
| entry->op_code = mad->opcode; |
| break; |
| default: |
| break; |
| }; |
| } |
| |
| /** |
| * ibmvfc_trc_end - Log an end trace entry |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_trc_end(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; |
| struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; |
| |
| entry->evt = evt; |
| entry->time = jiffies; |
| entry->fmt = evt->crq.format; |
| entry->type = IBMVFC_TRC_END; |
| |
| switch (entry->fmt) { |
| case IBMVFC_CMD_FORMAT: |
| entry->op_code = vfc_cmd->iu.cdb[0]; |
| entry->scsi_id = vfc_cmd->tgt_scsi_id; |
| entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); |
| entry->tmf_flags = vfc_cmd->iu.tmf_flags; |
| entry->u.end.status = vfc_cmd->status; |
| entry->u.end.error = vfc_cmd->error; |
| entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; |
| entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; |
| entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; |
| break; |
| case IBMVFC_MAD_FORMAT: |
| entry->op_code = mad->opcode; |
| entry->u.end.status = mad->status; |
| break; |
| default: |
| break; |
| |
| }; |
| } |
| |
| #else |
| #define ibmvfc_trc_start(evt) do { } while (0) |
| #define ibmvfc_trc_end(evt) do { } while (0) |
| #endif |
| |
| /** |
| * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response |
| * @status: status / error class |
| * @error: error |
| * |
| * Return value: |
| * index into cmd_status / -EINVAL on failure |
| **/ |
| static int ibmvfc_get_err_index(u16 status, u16 error) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(cmd_status); i++) |
| if ((cmd_status[i].status & status) == cmd_status[i].status && |
| cmd_status[i].error == error) |
| return i; |
| |
| return -EINVAL; |
| } |
| |
| /** |
| * ibmvfc_get_cmd_error - Find the error description for the fcp response |
| * @status: status / error class |
| * @error: error |
| * |
| * Return value: |
| * error description string |
| **/ |
| static const char *ibmvfc_get_cmd_error(u16 status, u16 error) |
| { |
| int rc = ibmvfc_get_err_index(status, error); |
| if (rc >= 0) |
| return cmd_status[rc].name; |
| return unknown_error; |
| } |
| |
| /** |
| * ibmvfc_get_err_result - Find the scsi status to return for the fcp response |
| * @vfc_cmd: ibmvfc command struct |
| * |
| * Return value: |
| * SCSI result value to return for completed command |
| **/ |
| static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) |
| { |
| int err; |
| struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| int fc_rsp_len = rsp->fcp_rsp_len; |
| |
| if ((rsp->flags & FCP_RSP_LEN_VALID) && |
| ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || |
| rsp->data.info.rsp_code)) |
| return DID_ERROR << 16; |
| |
| if (!vfc_cmd->status) { |
| if (rsp->flags & FCP_RESID_OVER) |
| return rsp->scsi_status | (DID_ERROR << 16); |
| else |
| return rsp->scsi_status | (DID_OK << 16); |
| } |
| |
| err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| if (err >= 0) |
| return rsp->scsi_status | (cmd_status[err].result << 16); |
| return rsp->scsi_status | (DID_ERROR << 16); |
| } |
| |
| /** |
| * ibmvfc_retry_cmd - Determine if error status is retryable |
| * @status: status / error class |
| * @error: error |
| * |
| * Return value: |
| * 1 if error should be retried / 0 if it should not |
| **/ |
| static int ibmvfc_retry_cmd(u16 status, u16 error) |
| { |
| int rc = ibmvfc_get_err_index(status, error); |
| |
| if (rc >= 0) |
| return cmd_status[rc].retry; |
| return 1; |
| } |
| |
| static const char *unknown_fc_explain = "unknown fc explain"; |
| |
| static const struct { |
| u16 fc_explain; |
| char *name; |
| } ls_explain [] = { |
| { 0x00, "no additional explanation" }, |
| { 0x01, "service parameter error - options" }, |
| { 0x03, "service parameter error - initiator control" }, |
| { 0x05, "service parameter error - recipient control" }, |
| { 0x07, "service parameter error - received data field size" }, |
| { 0x09, "service parameter error - concurrent seq" }, |
| { 0x0B, "service parameter error - credit" }, |
| { 0x0D, "invalid N_Port/F_Port_Name" }, |
| { 0x0E, "invalid node/Fabric Name" }, |
| { 0x0F, "invalid common service parameters" }, |
| { 0x11, "invalid association header" }, |
| { 0x13, "association header required" }, |
| { 0x15, "invalid originator S_ID" }, |
| { 0x17, "invalid OX_ID-RX-ID combination" }, |
| { 0x19, "command (request) already in progress" }, |
| { 0x1E, "N_Port Login requested" }, |
| { 0x1F, "Invalid N_Port_ID" }, |
| }; |
| |
| static const struct { |
| u16 fc_explain; |
| char *name; |
| } gs_explain [] = { |
| { 0x00, "no additional explanation" }, |
| { 0x01, "port identifier not registered" }, |
| { 0x02, "port name not registered" }, |
| { 0x03, "node name not registered" }, |
| { 0x04, "class of service not registered" }, |
| { 0x06, "initial process associator not registered" }, |
| { 0x07, "FC-4 TYPEs not registered" }, |
| { 0x08, "symbolic port name not registered" }, |
| { 0x09, "symbolic node name not registered" }, |
| { 0x0A, "port type not registered" }, |
| { 0xF0, "authorization exception" }, |
| { 0xF1, "authentication exception" }, |
| { 0xF2, "data base full" }, |
| { 0xF3, "data base empty" }, |
| { 0xF4, "processing request" }, |
| { 0xF5, "unable to verify connection" }, |
| { 0xF6, "devices not in a common zone" }, |
| }; |
| |
| /** |
| * ibmvfc_get_ls_explain - Return the FC Explain description text |
| * @status: FC Explain status |
| * |
| * Returns: |
| * error string |
| **/ |
| static const char *ibmvfc_get_ls_explain(u16 status) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(ls_explain); i++) |
| if (ls_explain[i].fc_explain == status) |
| return ls_explain[i].name; |
| |
| return unknown_fc_explain; |
| } |
| |
| /** |
| * ibmvfc_get_gs_explain - Return the FC Explain description text |
| * @status: FC Explain status |
| * |
| * Returns: |
| * error string |
| **/ |
| static const char *ibmvfc_get_gs_explain(u16 status) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gs_explain); i++) |
| if (gs_explain[i].fc_explain == status) |
| return gs_explain[i].name; |
| |
| return unknown_fc_explain; |
| } |
| |
| static const struct { |
| enum ibmvfc_fc_type fc_type; |
| char *name; |
| } fc_type [] = { |
| { IBMVFC_FABRIC_REJECT, "fabric reject" }, |
| { IBMVFC_PORT_REJECT, "port reject" }, |
| { IBMVFC_LS_REJECT, "ELS reject" }, |
| { IBMVFC_FABRIC_BUSY, "fabric busy" }, |
| { IBMVFC_PORT_BUSY, "port busy" }, |
| { IBMVFC_BASIC_REJECT, "basic reject" }, |
| }; |
| |
| static const char *unknown_fc_type = "unknown fc type"; |
| |
| /** |
| * ibmvfc_get_fc_type - Return the FC Type description text |
| * @status: FC Type error status |
| * |
| * Returns: |
| * error string |
| **/ |
| static const char *ibmvfc_get_fc_type(u16 status) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(fc_type); i++) |
| if (fc_type[i].fc_type == status) |
| return fc_type[i].name; |
| |
| return unknown_fc_type; |
| } |
| |
| /** |
| * ibmvfc_set_tgt_action - Set the next init action for the target |
| * @tgt: ibmvfc target struct |
| * @action: action to perform |
| * |
| **/ |
| static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, |
| enum ibmvfc_target_action action) |
| { |
| switch (tgt->action) { |
| case IBMVFC_TGT_ACTION_DEL_RPORT: |
| break; |
| default: |
| tgt->action = action; |
| break; |
| } |
| } |
| |
| /** |
| * ibmvfc_set_host_state - Set the state for the host |
| * @vhost: ibmvfc host struct |
| * @state: state to set host to |
| * |
| * Returns: |
| * 0 if state changed / non-zero if not changed |
| **/ |
| static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, |
| enum ibmvfc_host_state state) |
| { |
| int rc = 0; |
| |
| switch (vhost->state) { |
| case IBMVFC_HOST_OFFLINE: |
| rc = -EINVAL; |
| break; |
| default: |
| vhost->state = state; |
| break; |
| }; |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_set_host_action - Set the next init action for the host |
| * @vhost: ibmvfc host struct |
| * @action: action to perform |
| * |
| **/ |
| static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, |
| enum ibmvfc_host_action action) |
| { |
| switch (action) { |
| case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_QUERY: |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| case IBMVFC_HOST_ACTION_NONE: |
| case IBMVFC_HOST_ACTION_TGT_ADD: |
| vhost->action = action; |
| break; |
| default: |
| break; |
| }; |
| break; |
| case IBMVFC_HOST_ACTION_TGT_INIT: |
| if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) |
| vhost->action = action; |
| break; |
| case IBMVFC_HOST_ACTION_INIT: |
| case IBMVFC_HOST_ACTION_TGT_DEL: |
| case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| case IBMVFC_HOST_ACTION_TGT_ADD: |
| case IBMVFC_HOST_ACTION_NONE: |
| default: |
| vhost->action = action; |
| break; |
| }; |
| } |
| |
| /** |
| * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * nothing |
| **/ |
| static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) |
| { |
| if (vhost->action == IBMVFC_HOST_ACTION_NONE) { |
| if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| scsi_block_requests(vhost->host); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| } |
| } else |
| vhost->reinit = 1; |
| |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_link_down - Handle a link down event from the adapter |
| * @vhost: ibmvfc host struct |
| * @state: ibmvfc host state to enter |
| * |
| **/ |
| static void ibmvfc_link_down(struct ibmvfc_host *vhost, |
| enum ibmvfc_host_state state) |
| { |
| struct ibmvfc_target *tgt; |
| |
| ENTER; |
| scsi_block_requests(vhost->host); |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| ibmvfc_set_host_state(vhost, state); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| vhost->events_to_log |= IBMVFC_AE_LINKDOWN; |
| wake_up(&vhost->work_wait_q); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_init_host - Start host initialization |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * nothing |
| **/ |
| static void ibmvfc_init_host(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| dev_err(vhost->dev, |
| "Host initialization retries exceeded. Taking adapter offline\n"); |
| ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| return; |
| } |
| } |
| |
| if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| tgt->need_login = 1; |
| scsi_block_requests(vhost->host); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| vhost->job_step = ibmvfc_npiv_login; |
| wake_up(&vhost->work_wait_q); |
| } |
| } |
| |
| /** |
| * ibmvfc_send_crq - Send a CRQ |
| * @vhost: ibmvfc host struct |
| * @word1: the first 64 bits of the data |
| * @word2: the second 64 bits of the data |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) |
| { |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); |
| } |
| |
| /** |
| * ibmvfc_send_crq_init - Send a CRQ init message |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) |
| { |
| ibmvfc_dbg(vhost, "Sending CRQ init\n"); |
| return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); |
| } |
| |
| /** |
| * ibmvfc_send_crq_init_complete - Send a CRQ init complete message |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) |
| { |
| ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); |
| return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); |
| } |
| |
| /** |
| * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ |
| * @vhost: ibmvfc host struct |
| * |
| * Frees irq, deallocates a page for messages, unmaps dma, and unregisters |
| * the crq with the hypervisor. |
| **/ |
| static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) |
| { |
| long rc; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| struct ibmvfc_crq_queue *crq = &vhost->crq; |
| |
| ibmvfc_dbg(vhost, "Releasing CRQ\n"); |
| free_irq(vdev->irq, vhost); |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| vhost->state = IBMVFC_NO_CRQ; |
| dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| free_page((unsigned long)crq->msgs); |
| } |
| |
| /** |
| * ibmvfc_reenable_crq_queue - reenables the CRQ |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) |
| { |
| int rc; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| |
| /* Re-enable the CRQ */ |
| do { |
| rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
| } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| if (rc) |
| dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_reset_crq - resets a crq after a failure |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) |
| { |
| int rc; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| struct ibmvfc_crq_queue *crq = &vhost->crq; |
| |
| /* Close the CRQ */ |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| vhost->state = IBMVFC_NO_CRQ; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| |
| /* Clean out the queue */ |
| memset(crq->msgs, 0, PAGE_SIZE); |
| crq->cur = 0; |
| |
| /* And re-open it again */ |
| rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| crq->msg_token, PAGE_SIZE); |
| |
| if (rc == H_CLOSED) |
| /* Adapter is good, but other end is not ready */ |
| dev_warn(vhost->dev, "Partner adapter not ready\n"); |
| else if (rc != 0) |
| dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_valid_event - Determines if event is valid. |
| * @pool: event_pool that contains the event |
| * @evt: ibmvfc event to be checked for validity |
| * |
| * Return value: |
| * 1 if event is valid / 0 if event is not valid |
| **/ |
| static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, |
| struct ibmvfc_event *evt) |
| { |
| int index = evt - pool->events; |
| if (index < 0 || index >= pool->size) /* outside of bounds */ |
| return 0; |
| if (evt != pool->events + index) /* unaligned */ |
| return 0; |
| return 1; |
| } |
| |
| /** |
| * ibmvfc_free_event - Free the specified event |
| * @evt: ibmvfc_event to be freed |
| * |
| **/ |
| static void ibmvfc_free_event(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_event_pool *pool = &vhost->pool; |
| |
| BUG_ON(!ibmvfc_valid_event(pool, evt)); |
| BUG_ON(atomic_inc_return(&evt->free) != 1); |
| list_add_tail(&evt->queue, &vhost->free); |
| } |
| |
| /** |
| * ibmvfc_scsi_eh_done - EH done function for queuecommand commands |
| * @evt: ibmvfc event struct |
| * |
| * This function does not setup any error status, that must be done |
| * before this function gets called. |
| **/ |
| static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) |
| { |
| struct scsi_cmnd *cmnd = evt->cmnd; |
| |
| if (cmnd) { |
| scsi_dma_unmap(cmnd); |
| cmnd->scsi_done(cmnd); |
| } |
| |
| ibmvfc_free_event(evt); |
| } |
| |
| /** |
| * ibmvfc_fail_request - Fail request with specified error code |
| * @evt: ibmvfc event struct |
| * @error_code: error code to fail request with |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) |
| { |
| if (evt->cmnd) { |
| evt->cmnd->result = (error_code << 16); |
| evt->done = ibmvfc_scsi_eh_done; |
| } else |
| evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; |
| |
| list_del(&evt->queue); |
| del_timer(&evt->timer); |
| ibmvfc_trc_end(evt); |
| evt->done(evt); |
| } |
| |
| /** |
| * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests |
| * @vhost: ibmvfc host struct |
| * @error_code: error code to fail requests with |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) |
| { |
| struct ibmvfc_event *evt, *pos; |
| |
| ibmvfc_dbg(vhost, "Purging all requests\n"); |
| list_for_each_entry_safe(evt, pos, &vhost->sent, queue) |
| ibmvfc_fail_request(evt, error_code); |
| } |
| |
| /** |
| * __ibmvfc_reset_host - Reset the connection to the server (no locking) |
| * @vhost: struct ibmvfc host to reset |
| **/ |
| static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| { |
| int rc; |
| |
| scsi_block_requests(vhost->host); |
| ibmvfc_purge_requests(vhost, DID_ERROR); |
| if ((rc = ibmvfc_reset_crq(vhost)) || |
| (rc = ibmvfc_send_crq_init(vhost)) || |
| (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { |
| dev_err(vhost->dev, "Error after reset rc=%d\n", rc); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| } else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| } |
| |
| /** |
| * ibmvfc_reset_host - Reset the connection to the server |
| * @vhost: struct ibmvfc host to reset |
| **/ |
| static void ibmvfc_reset_host(struct ibmvfc_host *vhost) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| __ibmvfc_reset_host(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_retry_host_init - Retry host initialization if allowed |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) |
| { |
| if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { |
| if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| dev_err(vhost->dev, |
| "Host initialization retries exceeded. Taking adapter offline\n"); |
| ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) |
| __ibmvfc_reset_host(vhost); |
| else |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| } |
| |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * __ibmvfc_get_target - Find the specified scsi_target (no locking) |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * ibmvfc_target struct / NULL if not found |
| **/ |
| static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) |
| { |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| struct ibmvfc_target *tgt; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->target_id == starget->id) { |
| kref_get(&tgt->kref); |
| return tgt; |
| } |
| return NULL; |
| } |
| |
| /** |
| * ibmvfc_get_target - Find the specified scsi_target |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * ibmvfc_target struct / NULL if not found |
| **/ |
| static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) |
| { |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| tgt = __ibmvfc_get_target(starget); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return tgt; |
| } |
| |
| /** |
| * ibmvfc_get_host_speed - Get host port speed |
| * @shost: scsi host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_host_speed(struct Scsi_Host *shost) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (vhost->state == IBMVFC_ACTIVE) { |
| switch (vhost->login_buf->resp.link_speed / 100) { |
| case 1: |
| fc_host_speed(shost) = FC_PORTSPEED_1GBIT; |
| break; |
| case 2: |
| fc_host_speed(shost) = FC_PORTSPEED_2GBIT; |
| break; |
| case 4: |
| fc_host_speed(shost) = FC_PORTSPEED_4GBIT; |
| break; |
| case 8: |
| fc_host_speed(shost) = FC_PORTSPEED_8GBIT; |
| break; |
| case 10: |
| fc_host_speed(shost) = FC_PORTSPEED_10GBIT; |
| break; |
| case 16: |
| fc_host_speed(shost) = FC_PORTSPEED_16GBIT; |
| break; |
| default: |
| ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", |
| vhost->login_buf->resp.link_speed / 100); |
| fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| break; |
| } |
| } else |
| fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_get_host_port_state - Get host port state |
| * @shost: scsi host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| switch (vhost->state) { |
| case IBMVFC_INITIALIZING: |
| case IBMVFC_ACTIVE: |
| fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
| break; |
| case IBMVFC_LINK_DOWN: |
| fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
| break; |
| case IBMVFC_LINK_DEAD: |
| case IBMVFC_HOST_OFFLINE: |
| fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; |
| break; |
| case IBMVFC_HALTED: |
| fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; |
| break; |
| case IBMVFC_NO_CRQ: |
| fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| break; |
| default: |
| ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); |
| fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| break; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout |
| * @rport: rport struct |
| * @timeout: timeout value |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
| { |
| if (timeout) |
| rport->dev_loss_tmo = timeout; |
| else |
| rport->dev_loss_tmo = 1; |
| } |
| |
| /** |
| * ibmvfc_release_tgt - Free memory allocated for a target |
| * @kref: kref struct |
| * |
| **/ |
| static void ibmvfc_release_tgt(struct kref *kref) |
| { |
| struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); |
| kfree(tgt); |
| } |
| |
| /** |
| * ibmvfc_get_starget_node_name - Get SCSI target's node name |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_starget_node_name(struct scsi_target *starget) |
| { |
| struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
| fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; |
| if (tgt) |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } |
| |
| /** |
| * ibmvfc_get_starget_port_name - Get SCSI target's port name |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_starget_port_name(struct scsi_target *starget) |
| { |
| struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
| fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; |
| if (tgt) |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } |
| |
| /** |
| * ibmvfc_get_starget_port_id - Get SCSI target's port ID |
| * @starget: scsi target struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_get_starget_port_id(struct scsi_target *starget) |
| { |
| struct ibmvfc_target *tgt = ibmvfc_get_target(starget); |
| fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; |
| if (tgt) |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } |
| |
| /** |
| * ibmvfc_wait_while_resetting - Wait while the host resets |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) |
| { |
| long timeout = wait_event_timeout(vhost->init_wait_q, |
| (vhost->state == IBMVFC_ACTIVE || |
| vhost->state == IBMVFC_HOST_OFFLINE || |
| vhost->state == IBMVFC_LINK_DEAD), |
| (init_timeout * HZ)); |
| |
| return timeout ? 0 : -EIO; |
| } |
| |
| /** |
| * ibmvfc_issue_fc_host_lip - Re-initiate link initialization |
| * @shost: scsi host struct |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) |
| { |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); |
| ibmvfc_reset_host(vhost); |
| return ibmvfc_wait_while_resetting(vhost); |
| } |
| |
| /** |
| * ibmvfc_gather_partition_info - Gather info about the LPAR |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) |
| { |
| struct device_node *rootdn; |
| const char *name; |
| const unsigned int *num; |
| |
| rootdn = of_find_node_by_path("/"); |
| if (!rootdn) |
| return; |
| |
| name = of_get_property(rootdn, "ibm,partition-name", NULL); |
| if (name) |
| strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); |
| num = of_get_property(rootdn, "ibm,partition-no", NULL); |
| if (num) |
| vhost->partition_number = *num; |
| of_node_put(rootdn); |
| } |
| |
| /** |
| * ibmvfc_set_login_info - Setup info for NPIV login |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_npiv_login *login_info = &vhost->login_info; |
| struct device_node *of_node = vhost->dev->archdata.of_node; |
| const char *location; |
| |
| memset(login_info, 0, sizeof(*login_info)); |
| |
| login_info->ostype = IBMVFC_OS_LINUX; |
| login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; |
| login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); |
| login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); |
| login_info->partition_num = vhost->partition_number; |
| login_info->vfc_frame_version = 1; |
| login_info->fcp_version = 3; |
| if (vhost->client_migrated) |
| login_info->flags = IBMVFC_CLIENT_MIGRATED; |
| |
| login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| login_info->capabilities = IBMVFC_CAN_MIGRATE; |
| login_info->async.va = vhost->async_crq.msg_token; |
| login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); |
| strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); |
| strncpy(login_info->device_name, |
| vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); |
| |
| location = of_get_property(of_node, "ibm,loc-code", NULL); |
| location = location ? location : vhost->dev->bus_id; |
| strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); |
| } |
| |
| /** |
| * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host |
| * @vhost: ibmvfc host who owns the event pool |
| * |
| * Returns zero on success. |
| **/ |
| static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) |
| { |
| int i; |
| struct ibmvfc_event_pool *pool = &vhost->pool; |
| |
| ENTER; |
| pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; |
| pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); |
| if (!pool->events) |
| return -ENOMEM; |
| |
| pool->iu_storage = dma_alloc_coherent(vhost->dev, |
| pool->size * sizeof(*pool->iu_storage), |
| &pool->iu_token, 0); |
| |
| if (!pool->iu_storage) { |
| kfree(pool->events); |
| return -ENOMEM; |
| } |
| |
| for (i = 0; i < pool->size; ++i) { |
| struct ibmvfc_event *evt = &pool->events[i]; |
| atomic_set(&evt->free, 1); |
| evt->crq.valid = 0x80; |
| evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); |
| evt->xfer_iu = pool->iu_storage + i; |
| evt->vhost = vhost; |
| evt->ext_list = NULL; |
| list_add_tail(&evt->queue, &vhost->free); |
| } |
| |
| LEAVE; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_free_event_pool - Frees memory of the event pool of a host |
| * @vhost: ibmvfc host who owns the event pool |
| * |
| **/ |
| static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) |
| { |
| int i; |
| struct ibmvfc_event_pool *pool = &vhost->pool; |
| |
| ENTER; |
| for (i = 0; i < pool->size; ++i) { |
| list_del(&pool->events[i].queue); |
| BUG_ON(atomic_read(&pool->events[i].free) != 1); |
| if (pool->events[i].ext_list) |
| dma_pool_free(vhost->sg_pool, |
| pool->events[i].ext_list, |
| pool->events[i].ext_list_token); |
| } |
| |
| kfree(pool->events); |
| dma_free_coherent(vhost->dev, |
| pool->size * sizeof(*pool->iu_storage), |
| pool->iu_storage, pool->iu_token); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_get_event - Gets the next free event in pool |
| * @vhost: ibmvfc host struct |
| * |
| * Returns a free event from the pool. |
| **/ |
| static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_event *evt; |
| |
| BUG_ON(list_empty(&vhost->free)); |
| evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); |
| atomic_set(&evt->free, 0); |
| list_del(&evt->queue); |
| return evt; |
| } |
| |
| /** |
| * ibmvfc_init_event - Initialize fields in an event struct that are always |
| * required. |
| * @evt: The event |
| * @done: Routine to call when the event is responded to |
| * @format: SRP or MAD format |
| **/ |
| static void ibmvfc_init_event(struct ibmvfc_event *evt, |
| void (*done) (struct ibmvfc_event *), u8 format) |
| { |
| evt->cmnd = NULL; |
| evt->sync_iu = NULL; |
| evt->crq.format = format; |
| evt->done = done; |
| } |
| |
| /** |
| * ibmvfc_map_sg_list - Initialize scatterlist |
| * @scmd: scsi command struct |
| * @nseg: number of scatterlist segments |
| * @md: memory descriptor list to initialize |
| **/ |
| static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, |
| struct srp_direct_buf *md) |
| { |
| int i; |
| struct scatterlist *sg; |
| |
| scsi_for_each_sg(scmd, sg, nseg, i) { |
| md[i].va = sg_dma_address(sg); |
| md[i].len = sg_dma_len(sg); |
| md[i].key = 0; |
| } |
| } |
| |
| /** |
| * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields |
| * @scmd: Scsi_Cmnd with the scatterlist |
| * @evt: ibmvfc event struct |
| * @vfc_cmd: vfc_cmd that contains the memory descriptor |
| * @dev: device for which to map dma memory |
| * |
| * Returns: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, |
| struct ibmvfc_event *evt, |
| struct ibmvfc_cmd *vfc_cmd, struct device *dev) |
| { |
| |
| int sg_mapped; |
| struct srp_direct_buf *data = &vfc_cmd->ioba; |
| struct ibmvfc_host *vhost = dev_get_drvdata(dev); |
| |
| sg_mapped = scsi_dma_map(scmd); |
| if (!sg_mapped) { |
| vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; |
| return 0; |
| } else if (unlikely(sg_mapped < 0)) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); |
| return sg_mapped; |
| } |
| |
| if (scmd->sc_data_direction == DMA_TO_DEVICE) { |
| vfc_cmd->flags |= IBMVFC_WRITE; |
| vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; |
| } else { |
| vfc_cmd->flags |= IBMVFC_READ; |
| vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; |
| } |
| |
| if (sg_mapped == 1) { |
| ibmvfc_map_sg_list(scmd, sg_mapped, data); |
| return 0; |
| } |
| |
| vfc_cmd->flags |= IBMVFC_SCATTERLIST; |
| |
| if (!evt->ext_list) { |
| evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, |
| &evt->ext_list_token); |
| |
| if (!evt->ext_list) { |
| scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); |
| |
| data->va = evt->ext_list_token; |
| data->len = sg_mapped * sizeof(struct srp_direct_buf); |
| data->key = 0; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_timeout - Internal command timeout handler |
| * @evt: struct ibmvfc_event that timed out |
| * |
| * Called when an internally generated command times out |
| **/ |
| static void ibmvfc_timeout(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); |
| ibmvfc_reset_host(vhost); |
| } |
| |
| /** |
| * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() |
| * @evt: event to be sent |
| * @vhost: ibmvfc host struct |
| * @timeout: timeout in seconds - 0 means do not time command |
| * |
| * Returns the value returned from ibmvfc_send_crq(). (Zero for success) |
| **/ |
| static int ibmvfc_send_event(struct ibmvfc_event *evt, |
| struct ibmvfc_host *vhost, unsigned long timeout) |
| { |
| u64 *crq_as_u64 = (u64 *) &evt->crq; |
| int rc; |
| |
| /* Copy the IU into the transfer area */ |
| *evt->xfer_iu = evt->iu; |
| if (evt->crq.format == IBMVFC_CMD_FORMAT) |
| evt->xfer_iu->cmd.tag = (u64)evt; |
| else if (evt->crq.format == IBMVFC_MAD_FORMAT) |
| evt->xfer_iu->mad_common.tag = (u64)evt; |
| else |
| BUG(); |
| |
| list_add_tail(&evt->queue, &vhost->sent); |
| init_timer(&evt->timer); |
| |
| if (timeout) { |
| evt->timer.data = (unsigned long) evt; |
| evt->timer.expires = jiffies + (timeout * HZ); |
| evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; |
| add_timer(&evt->timer); |
| } |
| |
| if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { |
| list_del(&evt->queue); |
| del_timer(&evt->timer); |
| |
| /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. |
| * Firmware will send a CRQ with a transport event (0xFF) to |
| * tell this client what has happened to the transport. This |
| * will be handled in ibmvfc_handle_crq() |
| */ |
| if (rc == H_CLOSED) { |
| if (printk_ratelimit()) |
| dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); |
| if (evt->cmnd) |
| scsi_dma_unmap(evt->cmnd); |
| ibmvfc_free_event(evt); |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| dev_err(vhost->dev, "Send error (rc=%d)\n", rc); |
| if (evt->cmnd) { |
| evt->cmnd->result = DID_ERROR << 16; |
| evt->done = ibmvfc_scsi_eh_done; |
| } else |
| evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; |
| |
| evt->done(evt); |
| } else |
| ibmvfc_trc_start(evt); |
| |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_log_error - Log an error for the failed command if appropriate |
| * @evt: ibmvfc event to log |
| * |
| **/ |
| static void ibmvfc_log_error(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| struct scsi_cmnd *cmnd = evt->cmnd; |
| const char *err = unknown_error; |
| int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); |
| int logerr = 0; |
| int rsp_code = 0; |
| |
| if (index >= 0) { |
| logerr = cmd_status[index].log; |
| err = cmd_status[index].name; |
| } |
| |
| if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) |
| return; |
| |
| if (rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_code = rsp->data.info.rsp_code; |
| |
| scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " |
| "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", |
| cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, |
| rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); |
| } |
| |
| /** |
| * ibmvfc_scsi_done - Handle responses from commands |
| * @evt: ibmvfc event to be handled |
| * |
| * Used as a callback when sending scsi cmds. |
| **/ |
| static void ibmvfc_scsi_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; |
| struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; |
| struct scsi_cmnd *cmnd = evt->cmnd; |
| int rsp_len = 0; |
| int sense_len = rsp->fcp_sense_len; |
| |
| if (cmnd) { |
| if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) |
| scsi_set_resid(cmnd, vfc_cmd->adapter_resid); |
| else if (rsp->flags & FCP_RESID_UNDER) |
| scsi_set_resid(cmnd, rsp->fcp_resid); |
| else |
| scsi_set_resid(cmnd, 0); |
| |
| if (vfc_cmd->status) { |
| cmnd->result = ibmvfc_get_err_result(vfc_cmd); |
| |
| if (rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_len = rsp->fcp_rsp_len; |
| if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) |
| sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; |
| if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len) |
| memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); |
| |
| ibmvfc_log_error(evt); |
| } |
| |
| if (!cmnd->result && |
| (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) |
| cmnd->result = (DID_ERROR << 16); |
| |
| scsi_dma_unmap(cmnd); |
| cmnd->scsi_done(cmnd); |
| } |
| |
| ibmvfc_free_event(evt); |
| } |
| |
| /** |
| * ibmvfc_host_chkready - Check if the host can accept commands |
| * @vhost: struct ibmvfc host |
| * |
| * Returns: |
| * 1 if host can accept command / 0 if not |
| **/ |
| static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) |
| { |
| int result = 0; |
| |
| switch (vhost->state) { |
| case IBMVFC_LINK_DEAD: |
| case IBMVFC_HOST_OFFLINE: |
| result = DID_NO_CONNECT << 16; |
| break; |
| case IBMVFC_NO_CRQ: |
| case IBMVFC_INITIALIZING: |
| case IBMVFC_HALTED: |
| case IBMVFC_LINK_DOWN: |
| result = DID_REQUEUE << 16; |
| break; |
| case IBMVFC_ACTIVE: |
| result = 0; |
| break; |
| }; |
| |
| return result; |
| } |
| |
| /** |
| * ibmvfc_queuecommand - The queuecommand function of the scsi template |
| * @cmnd: struct scsi_cmnd to be executed |
| * @done: Callback function to be called when cmnd is completed |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, |
| void (*done) (struct scsi_cmnd *)) |
| { |
| struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| struct ibmvfc_cmd *vfc_cmd; |
| struct ibmvfc_event *evt; |
| u8 tag[2]; |
| int rc; |
| |
| if (unlikely((rc = fc_remote_port_chkready(rport))) || |
| unlikely((rc = ibmvfc_host_chkready(vhost)))) { |
| cmnd->result = rc; |
| done(cmnd); |
| return 0; |
| } |
| |
| cmnd->result = (DID_OK << 16); |
| evt = ibmvfc_get_event(vhost); |
| ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); |
| evt->cmnd = cmnd; |
| cmnd->scsi_done = done; |
| vfc_cmd = &evt->iu.cmd; |
| memset(vfc_cmd, 0, sizeof(*vfc_cmd)); |
| vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); |
| vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| vfc_cmd->payload_len = sizeof(vfc_cmd->iu); |
| vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); |
| vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; |
| vfc_cmd->tgt_scsi_id = rport->port_id; |
| if ((rport->supported_classes & FC_COS_CLASS3) && |
| (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) |
| vfc_cmd->flags = IBMVFC_CLASS_3_ERR; |
| vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); |
| int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); |
| memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); |
| |
| if (scsi_populate_tag_msg(cmnd, tag)) { |
| vfc_cmd->task_tag = tag[1]; |
| switch (tag[0]) { |
| case MSG_SIMPLE_TAG: |
| vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; |
| break; |
| case MSG_HEAD_TAG: |
| vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; |
| break; |
| case MSG_ORDERED_TAG: |
| vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; |
| break; |
| }; |
| } |
| |
| if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) |
| return ibmvfc_send_event(evt, vhost, 0); |
| |
| ibmvfc_free_event(evt); |
| if (rc == -ENOMEM) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| scmd_printk(KERN_ERR, cmnd, |
| "Failed to map DMA buffer for command. rc=%d\n", rc); |
| |
| cmnd->result = DID_ERROR << 16; |
| done(cmnd); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_sync_completion - Signal that a synchronous command has completed |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_sync_completion(struct ibmvfc_event *evt) |
| { |
| /* copy the response back */ |
| if (evt->sync_iu) |
| *evt->sync_iu = *evt->xfer_iu; |
| |
| complete(&evt->comp); |
| } |
| |
| /** |
| * ibmvfc_reset_device - Reset the device with the specified reset type |
| * @sdev: scsi device to reset |
| * @type: reset type |
| * @desc: reset type description for log messages |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_cmd *tmf; |
| struct ibmvfc_event *evt; |
| union ibmvfc_iu rsp_iu; |
| struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| int rsp_rc = -EBUSY; |
| unsigned long flags; |
| int rsp_code = 0; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| if (vhost->state == IBMVFC_ACTIVE) { |
| evt = ibmvfc_get_event(vhost); |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| |
| tmf = &evt->iu.cmd; |
| memset(tmf, 0, sizeof(*tmf)); |
| tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| tmf->resp.len = sizeof(tmf->rsp); |
| tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| tmf->payload_len = sizeof(tmf->iu); |
| tmf->resp_len = sizeof(tmf->rsp); |
| tmf->cancel_key = (unsigned long)sdev->hostdata; |
| tmf->tgt_scsi_id = rport->port_id; |
| int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| tmf->iu.tmf_flags = type; |
| evt->sync_iu = &rsp_iu; |
| |
| init_completion(&evt->comp); |
| rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rsp_rc != 0) { |
| sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", |
| desc, rsp_rc); |
| return -EIO; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); |
| wait_for_completion(&evt->comp); |
| |
| if (rsp_iu.cmd.status) { |
| if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_code = fc_rsp->data.info.rsp_code; |
| |
| sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " |
| "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| fc_rsp->scsi_status); |
| rsp_rc = -EIO; |
| } else |
| sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return rsp_rc; |
| } |
| |
| /** |
| * ibmvfc_abort_task_set - Abort outstanding commands to the device |
| * @sdev: scsi device to abort commands |
| * |
| * This sends an Abort Task Set to the VIOS for the specified device. This does |
| * NOT send any cancel to the VIOS. That must be done separately. |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_abort_task_set(struct scsi_device *sdev) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_cmd *tmf; |
| struct ibmvfc_event *evt, *found_evt; |
| union ibmvfc_iu rsp_iu; |
| struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; |
| int rsp_rc = -EBUSY; |
| unsigned long flags; |
| int rsp_code = 0; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| found_evt = NULL; |
| list_for_each_entry(evt, &vhost->sent, queue) { |
| if (evt->cmnd && evt->cmnd->device == sdev) { |
| found_evt = evt; |
| break; |
| } |
| } |
| |
| if (!found_evt) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| if (vhost->state == IBMVFC_ACTIVE) { |
| evt = ibmvfc_get_event(vhost); |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); |
| |
| tmf = &evt->iu.cmd; |
| memset(tmf, 0, sizeof(*tmf)); |
| tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); |
| tmf->resp.len = sizeof(tmf->rsp); |
| tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; |
| tmf->payload_len = sizeof(tmf->iu); |
| tmf->resp_len = sizeof(tmf->rsp); |
| tmf->cancel_key = (unsigned long)sdev->hostdata; |
| tmf->tgt_scsi_id = rport->port_id; |
| int_to_scsilun(sdev->lun, &tmf->iu.lun); |
| tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); |
| tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; |
| evt->sync_iu = &rsp_iu; |
| |
| init_completion(&evt->comp); |
| rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| } |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rsp_rc != 0) { |
| sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); |
| return -EIO; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); |
| wait_for_completion(&evt->comp); |
| |
| if (rsp_iu.cmd.status) { |
| if (fc_rsp->flags & FCP_RSP_LEN_VALID) |
| rsp_code = fc_rsp->data.info.rsp_code; |
| |
| sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " |
| "flags: %x fcp_rsp: %x, scsi_status: %x\n", |
| ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), |
| rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, |
| fc_rsp->scsi_status); |
| rsp_rc = -EIO; |
| } else |
| sdev_printk(KERN_INFO, sdev, "Abort successful\n"); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return rsp_rc; |
| } |
| |
| /** |
| * ibmvfc_cancel_all - Cancel all outstanding commands to the device |
| * @sdev: scsi device to cancel commands |
| * @type: type of error recovery being performed |
| * |
| * This sends a cancel to the VIOS for the specified device. This does |
| * NOT send any abort to the actual device. That must be done separately. |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) |
| { |
| struct ibmvfc_host *vhost = shost_priv(sdev->host); |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_tmf *tmf; |
| struct ibmvfc_event *evt, *found_evt; |
| union ibmvfc_iu rsp; |
| int rsp_rc = -EBUSY; |
| unsigned long flags; |
| u16 status; |
| |
| ENTER; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| found_evt = NULL; |
| list_for_each_entry(evt, &vhost->sent, queue) { |
| if (evt->cmnd && evt->cmnd->device == sdev) { |
| found_evt = evt; |
| break; |
| } |
| } |
| |
| if (!found_evt) { |
| if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) |
| sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| if (vhost->state == IBMVFC_ACTIVE) { |
| evt = ibmvfc_get_event(vhost); |
| ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); |
| |
| tmf = &evt->iu.tmf; |
| memset(tmf, 0, sizeof(*tmf)); |
| tmf->common.version = 1; |
| tmf->common.opcode = IBMVFC_TMF_MAD; |
| tmf->common.length = sizeof(*tmf); |
| tmf->scsi_id = rport->port_id; |
| int_to_scsilun(sdev->lun, &tmf->lun); |
| tmf->flags = (type | IBMVFC_TMF_LUA_VALID); |
| tmf->cancel_key = (unsigned long)sdev->hostdata; |
| tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata); |
| |
| evt->sync_iu = &rsp; |
| init_completion(&evt->comp); |
| rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); |
| } |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (rsp_rc != 0) { |
| sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); |
| return -EIO; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); |
| |
| wait_for_completion(&evt->comp); |
| status = rsp.mad_common.status; |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_free_event(evt); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| if (status != IBMVFC_MAD_SUCCESS) { |
| sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); |
| return -EIO; |
| } |
| |
| sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_eh_abort_handler - Abort a command |
| * @cmd: scsi command to abort |
| * |
| * Returns: |
| * SUCCESS / FAILED |
| **/ |
| static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) |
| { |
| struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| struct ibmvfc_event *evt, *pos; |
| int cancel_rc, abort_rc; |
| unsigned long flags; |
| |
| ENTER; |
| ibmvfc_wait_while_resetting(vhost); |
| cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET); |
| abort_rc = ibmvfc_abort_task_set(cmd->device); |
| |
| if (!cancel_rc && !abort_rc) { |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| if (evt->cmnd && evt->cmnd->device == cmd->device) |
| ibmvfc_fail_request(evt, DID_ABORT); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| LEAVE; |
| return SUCCESS; |
| } |
| |
| LEAVE; |
| return FAILED; |
| } |
| |
| /** |
| * ibmvfc_eh_device_reset_handler - Reset a single LUN |
| * @cmd: scsi command struct |
| * |
| * Returns: |
| * SUCCESS / FAILED |
| **/ |
| static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) |
| { |
| struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| struct ibmvfc_event *evt, *pos; |
| int cancel_rc, reset_rc; |
| unsigned long flags; |
| |
| ENTER; |
| ibmvfc_wait_while_resetting(vhost); |
| cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET); |
| reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN"); |
| |
| if (!cancel_rc && !reset_rc) { |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| if (evt->cmnd && evt->cmnd->device == cmd->device) |
| ibmvfc_fail_request(evt, DID_ABORT); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| LEAVE; |
| return SUCCESS; |
| } |
| |
| LEAVE; |
| return FAILED; |
| } |
| |
| /** |
| * ibmvfc_dev_cancel_all - Device iterated cancel all function |
| * @sdev: scsi device struct |
| * @data: return code |
| * |
| **/ |
| static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) |
| { |
| unsigned long *rc = data; |
| *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); |
| } |
| |
| /** |
| * ibmvfc_dev_abort_all - Device iterated abort task set function |
| * @sdev: scsi device struct |
| * @data: return code |
| * |
| **/ |
| static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) |
| { |
| unsigned long *rc = data; |
| *rc |= ibmvfc_abort_task_set(sdev); |
| } |
| |
| /** |
| * ibmvfc_eh_target_reset_handler - Reset the target |
| * @cmd: scsi command struct |
| * |
| * Returns: |
| * SUCCESS / FAILED |
| **/ |
| static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) |
| { |
| struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| struct scsi_target *starget = scsi_target(cmd->device); |
| struct ibmvfc_event *evt, *pos; |
| int reset_rc; |
| unsigned long cancel_rc = 0; |
| unsigned long flags; |
| |
| ENTER; |
| ibmvfc_wait_while_resetting(vhost); |
| starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target"); |
| |
| if (!cancel_rc && !reset_rc) { |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) |
| ibmvfc_fail_request(evt, DID_ABORT); |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| LEAVE; |
| return SUCCESS; |
| } |
| |
| LEAVE; |
| return FAILED; |
| } |
| |
| /** |
| * ibmvfc_eh_host_reset_handler - Reset the connection to the server |
| * @cmd: struct scsi_cmnd having problems |
| * |
| **/ |
| static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) |
| { |
| int rc; |
| struct ibmvfc_host *vhost = shost_priv(cmd->device->host); |
| |
| dev_err(vhost->dev, "Resetting connection due to error recovery\n"); |
| rc = ibmvfc_issue_fc_host_lip(vhost->host); |
| return rc ? FAILED : SUCCESS; |
| } |
| |
| /** |
| * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. |
| * @rport: rport struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_terminate_rport_io(struct fc_rport *rport) |
| { |
| struct scsi_target *starget = to_scsi_target(&rport->dev); |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| struct ibmvfc_event *evt, *pos; |
| unsigned long cancel_rc = 0; |
| unsigned long abort_rc = 0; |
| unsigned long flags; |
| |
| ENTER; |
| starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); |
| starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); |
| |
| if (!cancel_rc && !abort_rc) { |
| spin_lock_irqsave(shost->host_lock, flags); |
| list_for_each_entry_safe(evt, pos, &vhost->sent, queue) { |
| if (evt->cmnd && scsi_target(evt->cmnd->device) == starget) |
| ibmvfc_fail_request(evt, DID_ABORT); |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } else |
| ibmvfc_issue_fc_host_lip(shost); |
| |
| scsi_target_unblock(&rport->dev); |
| LEAVE; |
| } |
| |
| static const struct { |
| enum ibmvfc_async_event ae; |
| const char *desc; |
| } ae_desc [] = { |
| { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, |
| { IBMVFC_AE_ELS_LOGO, "LOGO" }, |
| { IBMVFC_AE_ELS_PRLO, "PRLO" }, |
| { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, |
| { IBMVFC_AE_SCN_GROUP, "Group SCN" }, |
| { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, |
| { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, |
| { IBMVFC_AE_LINK_UP, "Link Up" }, |
| { IBMVFC_AE_LINK_DOWN, "Link Down" }, |
| { IBMVFC_AE_LINK_DEAD, "Link Dead" }, |
| { IBMVFC_AE_HALT, "Halt" }, |
| { IBMVFC_AE_RESUME, "Resume" }, |
| { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, |
| }; |
| |
| static const char *unknown_ae = "Unknown async"; |
| |
| /** |
| * ibmvfc_get_ae_desc - Get text description for async event |
| * @ae: async event |
| * |
| **/ |
| static const char *ibmvfc_get_ae_desc(u64 ae) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(ae_desc); i++) |
| if (ae_desc[i].ae == ae) |
| return ae_desc[i].desc; |
| |
| return unknown_ae; |
| } |
| |
| /** |
| * ibmvfc_handle_async - Handle an async event from the adapter |
| * @crq: crq to process |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, |
| struct ibmvfc_host *vhost) |
| { |
| const char *desc = ibmvfc_get_ae_desc(crq->event); |
| |
| ibmvfc_log(vhost, 3, "%s event received\n", desc); |
| |
| switch (crq->event) { |
| case IBMVFC_AE_LINK_UP: |
| case IBMVFC_AE_RESUME: |
| vhost->events_to_log |= IBMVFC_AE_LINKUP; |
| ibmvfc_init_host(vhost); |
| break; |
| case IBMVFC_AE_SCN_FABRIC: |
| vhost->events_to_log |= IBMVFC_AE_RSCN; |
| ibmvfc_init_host(vhost); |
| break; |
| case IBMVFC_AE_SCN_NPORT: |
| case IBMVFC_AE_SCN_GROUP: |
| case IBMVFC_AE_SCN_DOMAIN: |
| vhost->events_to_log |= IBMVFC_AE_RSCN; |
| case IBMVFC_AE_ELS_LOGO: |
| case IBMVFC_AE_ELS_PRLO: |
| case IBMVFC_AE_ELS_PLOGI: |
| ibmvfc_reinit_host(vhost); |
| break; |
| case IBMVFC_AE_LINK_DOWN: |
| case IBMVFC_AE_ADAPTER_FAILED: |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| break; |
| case IBMVFC_AE_LINK_DEAD: |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| break; |
| case IBMVFC_AE_HALT: |
| ibmvfc_link_down(vhost, IBMVFC_HALTED); |
| break; |
| default: |
| dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); |
| break; |
| }; |
| } |
| |
| /** |
| * ibmvfc_handle_crq - Handles and frees received events in the CRQ |
| * @crq: Command/Response queue |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) |
| { |
| long rc; |
| struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; |
| |
| switch (crq->valid) { |
| case IBMVFC_CRQ_INIT_RSP: |
| switch (crq->format) { |
| case IBMVFC_CRQ_INIT: |
| dev_info(vhost->dev, "Partner initialized\n"); |
| /* Send back a response */ |
| rc = ibmvfc_send_crq_init_complete(vhost); |
| if (rc == 0) |
| ibmvfc_init_host(vhost); |
| else |
| dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); |
| break; |
| case IBMVFC_CRQ_INIT_COMPLETE: |
| dev_info(vhost->dev, "Partner initialization complete\n"); |
| ibmvfc_init_host(vhost); |
| break; |
| default: |
| dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); |
| } |
| return; |
| case IBMVFC_CRQ_XPORT_EVENT: |
| vhost->state = IBMVFC_NO_CRQ; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| if (crq->format == IBMVFC_PARTITION_MIGRATED) { |
| /* We need to re-setup the interpartition connection */ |
| dev_info(vhost->dev, "Re-enabling adapter\n"); |
| vhost->client_migrated = 1; |
| ibmvfc_purge_requests(vhost, DID_REQUEUE); |
| if ((rc = ibmvfc_reenable_crq_queue(vhost)) || |
| (rc = ibmvfc_send_crq_init(vhost))) { |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); |
| } else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| } else { |
| dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); |
| |
| ibmvfc_purge_requests(vhost, DID_ERROR); |
| if ((rc = ibmvfc_reset_crq(vhost)) || |
| (rc = ibmvfc_send_crq_init(vhost))) { |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); |
| } else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); |
| } |
| return; |
| case IBMVFC_CRQ_CMD_RSP: |
| break; |
| default: |
| dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); |
| return; |
| } |
| |
| if (crq->format == IBMVFC_ASYNC_EVENT) |
| return; |
| |
| /* The only kind of payload CRQs we should get are responses to |
| * things we send. Make sure this response is to something we |
| * actually sent |
| */ |
| if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { |
| dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", |
| crq->ioba); |
| return; |
| } |
| |
| if (unlikely(atomic_read(&evt->free))) { |
| dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", |
| crq->ioba); |
| return; |
| } |
| |
| del_timer(&evt->timer); |
| list_del(&evt->queue); |
| ibmvfc_trc_end(evt); |
| evt->done(evt); |
| } |
| |
| /** |
| * ibmvfc_scan_finished - Check if the device scan is done. |
| * @shost: scsi host struct |
| * @time: current elapsed time |
| * |
| * Returns: |
| * 0 if scan is not done / 1 if scan is done |
| **/ |
| static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| { |
| unsigned long flags; |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| int done = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (time >= (init_timeout * HZ)) { |
| dev_info(vhost->dev, "Scan taking longer than %d seconds, " |
| "continuing initialization\n", init_timeout); |
| done = 1; |
| } |
| |
| if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) |
| done = 1; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return done; |
| } |
| |
| /** |
| * ibmvfc_slave_alloc - Setup the device's task set value |
| * @sdev: struct scsi_device device to configure |
| * |
| * Set the device's task set value so that error handling works as |
| * expected. |
| * |
| * Returns: |
| * 0 on success / -ENXIO if device does not exist |
| **/ |
| static int ibmvfc_slave_alloc(struct scsi_device *sdev) |
| { |
| struct Scsi_Host *shost = sdev->host; |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| |
| if (!rport || fc_remote_port_chkready(rport)) |
| return -ENXIO; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| sdev->hostdata = (void *)(unsigned long)vhost->task_set++; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_slave_configure - Configure the device |
| * @sdev: struct scsi_device device to configure |
| * |
| * Enable allow_restart for a device if it is a disk. Adjust the |
| * queue_depth here also. |
| * |
| * Returns: |
| * 0 |
| **/ |
| static int ibmvfc_slave_configure(struct scsi_device *sdev) |
| { |
| struct Scsi_Host *shost = sdev->host; |
| struct fc_rport *rport = starget_to_rport(sdev->sdev_target); |
| unsigned long flags = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (sdev->type == TYPE_DISK) |
| sdev->allow_restart = 1; |
| |
| if (sdev->tagged_supported) { |
| scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
| scsi_activate_tcq(sdev, sdev->queue_depth); |
| } else |
| scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| |
| rport->dev_loss_tmo = dev_loss_tmo; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_change_queue_depth - Change the device's queue depth |
| * @sdev: scsi device struct |
| * @qdepth: depth to set |
| * |
| * Return value: |
| * actual depth set |
| **/ |
| static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) |
| { |
| if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) |
| qdepth = IBMVFC_MAX_CMDS_PER_LUN; |
| |
| scsi_adjust_queue_depth(sdev, 0, qdepth); |
| return sdev->queue_depth; |
| } |
| |
| /** |
| * ibmvfc_change_queue_type - Change the device's queue type |
| * @sdev: scsi device struct |
| * @tag_type: type of tags to use |
| * |
| * Return value: |
| * actual queue type set |
| **/ |
| static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) |
| { |
| if (sdev->tagged_supported) { |
| scsi_set_tag_type(sdev, tag_type); |
| |
| if (tag_type) |
| scsi_activate_tcq(sdev, sdev->queue_depth); |
| else |
| scsi_deactivate_tcq(sdev, sdev->queue_depth); |
| } else |
| tag_type = 0; |
| |
| return tag_type; |
| } |
| |
| static ssize_t ibmvfc_show_host_partition_name(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.partition_name); |
| } |
| |
| static struct device_attribute ibmvfc_host_partition_name = { |
| .attr = { |
| .name = "partition_name", |
| .mode = S_IRUGO, |
| }, |
| .show = ibmvfc_show_host_partition_name, |
| }; |
| |
| static ssize_t ibmvfc_show_host_device_name(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.device_name); |
| } |
| |
| static struct device_attribute ibmvfc_host_device_name = { |
| .attr = { |
| .name = "device_name", |
| .mode = S_IRUGO, |
| }, |
| .show = ibmvfc_show_host_device_name, |
| }; |
| |
| static ssize_t ibmvfc_show_host_loc_code(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.port_loc_code); |
| } |
| |
| static struct device_attribute ibmvfc_host_loc_code = { |
| .attr = { |
| .name = "port_loc_code", |
| .mode = S_IRUGO, |
| }, |
| .show = ibmvfc_show_host_loc_code, |
| }; |
| |
| static ssize_t ibmvfc_show_host_drc_name(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| |
| return snprintf(buf, PAGE_SIZE, "%s\n", |
| vhost->login_buf->resp.drc_name); |
| } |
| |
| static struct device_attribute ibmvfc_host_drc_name = { |
| .attr = { |
| .name = "drc_name", |
| .mode = S_IRUGO, |
| }, |
| .show = ibmvfc_show_host_drc_name, |
| }; |
| |
| static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); |
| } |
| |
| static struct device_attribute ibmvfc_host_npiv_version = { |
| .attr = { |
| .name = "npiv_version", |
| .mode = S_IRUGO, |
| }, |
| .show = ibmvfc_show_host_npiv_version, |
| }; |
| |
| /** |
| * ibmvfc_show_log_level - Show the adapter's error logging level |
| * @dev: class device struct |
| * @buf: buffer |
| * |
| * Return value: |
| * number of bytes printed to buffer |
| **/ |
| static ssize_t ibmvfc_show_log_level(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| int len; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return len; |
| } |
| |
| /** |
| * ibmvfc_store_log_level - Change the adapter's error logging level |
| * @dev: class device struct |
| * @buf: buffer |
| * |
| * Return value: |
| * number of bytes printed to buffer |
| **/ |
| static ssize_t ibmvfc_store_log_level(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| vhost->log_level = simple_strtoul(buf, NULL, 10); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return strlen(buf); |
| } |
| |
| static struct device_attribute ibmvfc_log_level_attr = { |
| .attr = { |
| .name = "log_level", |
| .mode = S_IRUGO | S_IWUSR, |
| }, |
| .show = ibmvfc_show_log_level, |
| .store = ibmvfc_store_log_level |
| }; |
| |
| #ifdef CONFIG_SCSI_IBMVFC_TRACE |
| /** |
| * ibmvfc_read_trace - Dump the adapter trace |
| * @kobj: kobject struct |
| * @bin_attr: bin_attribute struct |
| * @buf: buffer |
| * @off: offset |
| * @count: buffer size |
| * |
| * Return value: |
| * number of bytes printed to buffer |
| **/ |
| static ssize_t ibmvfc_read_trace(struct kobject *kobj, |
| struct bin_attribute *bin_attr, |
| char *buf, loff_t off, size_t count) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct ibmvfc_host *vhost = shost_priv(shost); |
| unsigned long flags = 0; |
| int size = IBMVFC_TRACE_SIZE; |
| char *src = (char *)vhost->trace; |
| |
| if (off > size) |
| return 0; |
| if (off + count > size) { |
| size -= off; |
| count = size; |
| } |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| memcpy(buf, &src[off], count); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return count; |
| } |
| |
| static struct bin_attribute ibmvfc_trace_attr = { |
| .attr = { |
| .name = "trace", |
| .mode = S_IRUGO, |
| }, |
| .size = 0, |
| .read = ibmvfc_read_trace, |
| }; |
| #endif |
| |
| static struct device_attribute *ibmvfc_attrs[] = { |
| &ibmvfc_host_partition_name, |
| &ibmvfc_host_device_name, |
| &ibmvfc_host_loc_code, |
| &ibmvfc_host_drc_name, |
| &ibmvfc_host_npiv_version, |
| &ibmvfc_log_level_attr, |
| NULL |
| }; |
| |
| static struct scsi_host_template driver_template = { |
| .module = THIS_MODULE, |
| .name = "IBM POWER Virtual FC Adapter", |
| .proc_name = IBMVFC_NAME, |
| .queuecommand = ibmvfc_queuecommand, |
| .eh_abort_handler = ibmvfc_eh_abort_handler, |
| .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, |
| .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, |
| .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, |
| .slave_alloc = ibmvfc_slave_alloc, |
| .slave_configure = ibmvfc_slave_configure, |
| .scan_finished = ibmvfc_scan_finished, |
| .change_queue_depth = ibmvfc_change_queue_depth, |
| .change_queue_type = ibmvfc_change_queue_type, |
| .cmd_per_lun = 16, |
| .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, |
| .this_id = -1, |
| .sg_tablesize = SG_ALL, |
| .max_sectors = IBMVFC_MAX_SECTORS, |
| .use_clustering = ENABLE_CLUSTERING, |
| .shost_attrs = ibmvfc_attrs, |
| }; |
| |
| /** |
| * ibmvfc_next_async_crq - Returns the next entry in async queue |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * Pointer to next entry in queue / NULL if empty |
| **/ |
| static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; |
| struct ibmvfc_async_crq *crq; |
| |
| crq = &async_crq->msgs[async_crq->cur]; |
| if (crq->valid & 0x80) { |
| if (++async_crq->cur == async_crq->size) |
| async_crq->cur = 0; |
| } else |
| crq = NULL; |
| |
| return crq; |
| } |
| |
| /** |
| * ibmvfc_next_crq - Returns the next entry in message queue |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * Pointer to next entry in queue / NULL if empty |
| **/ |
| static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_crq_queue *queue = &vhost->crq; |
| struct ibmvfc_crq *crq; |
| |
| crq = &queue->msgs[queue->cur]; |
| if (crq->valid & 0x80) { |
| if (++queue->cur == queue->size) |
| queue->cur = 0; |
| } else |
| crq = NULL; |
| |
| return crq; |
| } |
| |
| /** |
| * ibmvfc_interrupt - Interrupt handler |
| * @irq: number of irq to handle, not used |
| * @dev_instance: ibmvfc_host that received interrupt |
| * |
| * Returns: |
| * IRQ_HANDLED |
| **/ |
| static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) |
| { |
| struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; |
| struct vio_dev *vdev = to_vio_dev(vhost->dev); |
| struct ibmvfc_crq *crq; |
| struct ibmvfc_async_crq *async; |
| unsigned long flags; |
| int done = 0; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| vio_disable_interrupts(to_vio_dev(vhost->dev)); |
| while (!done) { |
| /* Pull all the valid messages off the CRQ */ |
| while ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| ibmvfc_handle_crq(crq, vhost); |
| crq->valid = 0; |
| } |
| |
| /* Pull all the valid messages off the async CRQ */ |
| while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| ibmvfc_handle_async(async, vhost); |
| async->valid = 0; |
| } |
| |
| vio_enable_interrupts(vdev); |
| if ((crq = ibmvfc_next_crq(vhost)) != NULL) { |
| vio_disable_interrupts(vdev); |
| ibmvfc_handle_crq(crq, vhost); |
| crq->valid = 0; |
| } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { |
| vio_disable_interrupts(vdev); |
| ibmvfc_handle_async(async, vhost); |
| crq->valid = 0; |
| } else |
| done = 1; |
| } |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * ibmvfc_init_tgt - Set the next init job step for the target |
| * @tgt: ibmvfc target struct |
| * @job_step: job step to perform |
| * |
| **/ |
| static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, |
| void (*job_step) (struct ibmvfc_target *)) |
| { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); |
| tgt->job_step = job_step; |
| wake_up(&tgt->vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization |
| * @tgt: ibmvfc target struct |
| * @job_step: initialization job step |
| * |
| **/ |
| static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, |
| void (*job_step) (struct ibmvfc_target *)) |
| { |
| if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| wake_up(&tgt->vhost->work_wait_q); |
| } else |
| ibmvfc_init_tgt(tgt, job_step); |
| } |
| |
| /** |
| * ibmvfc_tgt_prli_done - Completion handler for Process Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; |
| u32 status = rsp->common.status; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Process Login succeeded\n"); |
| tgt->need_login = 0; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(rsp->status, rsp->error), |
| rsp->status, rsp->error, status); |
| if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); |
| break; |
| }; |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_send_prli - Send a process login |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_process_login *prli; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(vhost); |
| vhost->discovery_threads++; |
| ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| prli = &evt->iu.prli; |
| memset(prli, 0, sizeof(*prli)); |
| prli->common.version = 1; |
| prli->common.opcode = IBMVFC_PROCESS_LOGIN; |
| prli->common.length = sizeof(*prli); |
| prli->scsi_id = tgt->scsi_id; |
| |
| prli->parms.type = IBMVFC_SCSI_FCP_TYPE; |
| prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; |
| prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent process login\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_plogi_done - Completion handler for Port Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; |
| u32 status = rsp->common.status; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Port Login succeeded\n"); |
| if (tgt->ids.port_name && |
| tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { |
| vhost->reinit = 1; |
| tgt_dbg(tgt, "Port re-init required\n"); |
| break; |
| } |
| tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); |
| tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); |
| tgt->ids.port_id = tgt->scsi_id; |
| tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; |
| memcpy(&tgt->service_parms, &rsp->service_parms, |
| sizeof(tgt->service_parms)); |
| memcpy(&tgt->service_parms_change, &rsp->service_parms_change, |
| sizeof(tgt->service_parms_change)); |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); |
| |
| if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); |
| break; |
| }; |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_port_login *plogi; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(vhost); |
| vhost->discovery_threads++; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| plogi = &evt->iu.plogi; |
| memset(plogi, 0, sizeof(*plogi)); |
| plogi->common.version = 1; |
| plogi->common.opcode = IBMVFC_PORT_LOGIN; |
| plogi->common.length = sizeof(*plogi); |
| plogi->scsi_id = tgt->scsi_id; |
| |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent port login\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; |
| u32 status = rsp->common.status; |
| |
| vhost->discovery_threads--; |
| ibmvfc_free_event(evt); |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Implicit Logout succeeded\n"); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| wake_up(&vhost->work_wait_q); |
| return; |
| case IBMVFC_MAD_FAILED: |
| default: |
| tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); |
| break; |
| }; |
| |
| if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); |
| else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && |
| tgt->scsi_id != tgt->new_scsi_id) |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_implicit_logout *mad; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(vhost); |
| vhost->discovery_threads++; |
| ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| mad = &evt->iu.implicit_logout; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = 1; |
| mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; |
| mad->common.length = sizeof(*mad); |
| mad->old_scsi_id = tgt->scsi_id; |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent Implicit Logout\n"); |
| } |
| |
| /** |
| * ibmvfc_adisc_needs_plogi - Does device need PLOGI? |
| * @mad: ibmvfc passthru mad struct |
| * @tgt: ibmvfc target struct |
| * |
| * Returns: |
| * 1 if PLOGI needed / 0 if PLOGI not needed |
| **/ |
| static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, |
| struct ibmvfc_target *tgt) |
| { |
| if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, |
| sizeof(tgt->ids.port_name))) |
| return 1; |
| if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, |
| sizeof(tgt->ids.node_name))) |
| return 1; |
| if (mad->fc_iu.response[6] != tgt->scsi_id) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_tgt_adisc_done - Completion handler for ADISC |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; |
| u32 status = mad->common.status; |
| u8 fc_reason, fc_explain; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "ADISC succeeded\n"); |
| if (ibmvfc_adisc_needs_plogi(mad, tgt)) |
| tgt->need_login = 1; |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| tgt->need_login = 1; |
| fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; |
| fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; |
| tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), |
| mad->iu.status, mad->iu.error, |
| ibmvfc_get_fc_type(fc_reason), fc_reason, |
| ibmvfc_get_ls_explain(fc_explain), fc_explain, status); |
| break; |
| }; |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_init_passthru - Initialize an event struct for FC passthru |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_init_passthru(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; |
| |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = 1; |
| mad->common.opcode = IBMVFC_PASSTHRU; |
| mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); |
| mad->cmd_ioba.va = (u64)evt->crq.ioba + |
| offsetof(struct ibmvfc_passthru_mad, iu); |
| mad->cmd_ioba.len = sizeof(mad->iu); |
| mad->iu.cmd_len = sizeof(mad->fc_iu.payload); |
| mad->iu.rsp_len = sizeof(mad->fc_iu.response); |
| mad->iu.cmd.va = (u64)evt->crq.ioba + |
| offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| offsetof(struct ibmvfc_passthru_fc_iu, payload); |
| mad->iu.cmd.len = sizeof(mad->fc_iu.payload); |
| mad->iu.rsp.va = (u64)evt->crq.ioba + |
| offsetof(struct ibmvfc_passthru_mad, fc_iu) + |
| offsetof(struct ibmvfc_passthru_fc_iu, response); |
| mad->iu.rsp.len = sizeof(mad->fc_iu.response); |
| } |
| |
| /** |
| * ibmvfc_tgt_adisc - Initiate an ADISC for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_passthru_mad *mad; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(vhost); |
| vhost->discovery_threads++; |
| ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); |
| evt->tgt = tgt; |
| |
| ibmvfc_init_passthru(evt); |
| mad = &evt->iu.passthru; |
| mad->iu.flags = IBMVFC_FC_ELS; |
| mad->iu.scsi_id = tgt->scsi_id; |
| |
| mad->fc_iu.payload[0] = IBMVFC_ADISC; |
| memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, |
| sizeof(vhost->login_buf->resp.port_name)); |
| memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, |
| sizeof(vhost->login_buf->resp.node_name)); |
| mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent ADISC\n"); |
| } |
| |
| /** |
| * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_target *tgt = evt->tgt; |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; |
| u32 status = rsp->common.status; |
| |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| switch (status) { |
| case IBMVFC_MAD_SUCCESS: |
| tgt_dbg(tgt, "Query Target succeeded\n"); |
| tgt->new_scsi_id = rsp->scsi_id; |
| if (rsp->scsi_id != tgt->scsi_id) |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| else |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| break; |
| case IBMVFC_MAD_FAILED: |
| default: |
| tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", |
| ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, |
| ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, |
| ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); |
| |
| if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && |
| rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && |
| rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); |
| else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); |
| break; |
| }; |
| |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_tgt_query_target - Initiate a Query Target for specified target |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_query_tgt *query_tgt; |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct ibmvfc_event *evt; |
| |
| if (vhost->discovery_threads >= disc_threads) |
| return; |
| |
| kref_get(&tgt->kref); |
| evt = ibmvfc_get_event(vhost); |
| vhost->discovery_threads++; |
| evt->tgt = tgt; |
| ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); |
| query_tgt = &evt->iu.query_tgt; |
| memset(query_tgt, 0, sizeof(*query_tgt)); |
| query_tgt->common.version = 1; |
| query_tgt->common.opcode = IBMVFC_QUERY_TARGET; |
| query_tgt->common.length = sizeof(*query_tgt); |
| query_tgt->wwpn = tgt->ids.port_name; |
| |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); |
| if (ibmvfc_send_event(evt, vhost, default_timeout)) { |
| vhost->discovery_threads--; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| } else |
| tgt_dbg(tgt, "Sent Query Target\n"); |
| } |
| |
| /** |
| * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target |
| * @vhost: ibmvfc host struct |
| * @scsi_id: SCSI ID to allocate target for |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) |
| { |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->scsi_id == scsi_id) { |
| if (tgt->need_login) |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| goto unlock_out; |
| } |
| } |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); |
| if (!tgt) { |
| dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", |
| scsi_id); |
| return -ENOMEM; |
| } |
| |
| tgt->scsi_id = scsi_id; |
| tgt->new_scsi_id = scsi_id; |
| tgt->vhost = vhost; |
| tgt->need_login = 1; |
| kref_init(&tgt->kref); |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| list_add_tail(&tgt->queue, &vhost->targets); |
| |
| unlock_out: |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 0 on success / other on failure |
| **/ |
| static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) |
| { |
| int i, rc; |
| |
| for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) |
| rc = ibmvfc_alloc_target(vhost, |
| vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); |
| |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_discover_targets_done - Completion handler for discover targets MAD |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; |
| u32 mad_status = rsp->common.status; |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); |
| vhost->num_targets = rsp->num_written; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); |
| break; |
| case IBMVFC_MAD_FAILED: |
| dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", |
| ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| ibmvfc_retry_host_init(vhost); |
| break; |
| case IBMVFC_MAD_DRIVER_FAILED: |
| break; |
| default: |
| dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| break; |
| } |
| |
| ibmvfc_free_event(evt); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_discover_targets - Send Discover Targets MAD |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_discover_targets *mad; |
| struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| |
| ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); |
| mad = &evt->iu.discover_targets; |
| memset(mad, 0, sizeof(*mad)); |
| mad->common.version = 1; |
| mad->common.opcode = IBMVFC_DISC_TARGETS; |
| mad->common.length = sizeof(*mad); |
| mad->bufflen = vhost->disc_buf_sz; |
| mad->buffer.va = vhost->disc_buf_dma; |
| mad->buffer.len = vhost->disc_buf_sz; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Sent discover targets\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| } |
| |
| /** |
| * ibmvfc_npiv_login_done - Completion handler for NPIV Login |
| * @evt: ibmvfc event struct |
| * |
| **/ |
| static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) |
| { |
| struct ibmvfc_host *vhost = evt->vhost; |
| u32 mad_status = evt->xfer_iu->npiv_login.common.status; |
| struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; |
| unsigned int npiv_max_sectors; |
| |
| switch (mad_status) { |
| case IBMVFC_MAD_SUCCESS: |
| ibmvfc_free_event(evt); |
| break; |
| case IBMVFC_MAD_FAILED: |
| dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", |
| ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); |
| if (ibmvfc_retry_cmd(rsp->status, rsp->error)) |
| ibmvfc_retry_host_init(vhost); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| ibmvfc_free_event(evt); |
| return; |
| case IBMVFC_MAD_CRQ_ERROR: |
| ibmvfc_retry_host_init(vhost); |
| case IBMVFC_MAD_DRIVER_FAILED: |
| ibmvfc_free_event(evt); |
| return; |
| default: |
| dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| ibmvfc_free_event(evt); |
| return; |
| } |
| |
| vhost->client_migrated = 0; |
| |
| if (!(rsp->flags & IBMVFC_NATIVE_FC)) { |
| dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", |
| rsp->flags); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| wake_up(&vhost->work_wait_q); |
| return; |
| } |
| |
| if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { |
| dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", |
| rsp->max_cmds); |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| wake_up(&vhost->work_wait_q); |
| return; |
| } |
| |
| npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); |
| dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", |
| rsp->partition_name, rsp->device_name, rsp->port_loc_code, |
| rsp->drc_name, npiv_max_sectors); |
| |
| fc_host_fabric_name(vhost->host) = rsp->node_name; |
| fc_host_node_name(vhost->host) = rsp->node_name; |
| fc_host_port_name(vhost->host) = rsp->port_name; |
| fc_host_port_id(vhost->host) = rsp->scsi_id; |
| fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; |
| fc_host_supported_classes(vhost->host) = 0; |
| if (rsp->service_parms.class1_parms[0] & 0x80000000) |
| fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; |
| if (rsp->service_parms.class2_parms[0] & 0x80000000) |
| fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; |
| if (rsp->service_parms.class3_parms[0] & 0x80000000) |
| fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; |
| fc_host_maxframe_size(vhost->host) = |
| rsp->service_parms.common.bb_rcv_sz & 0x0fff; |
| |
| vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; |
| vhost->host->max_sectors = npiv_max_sectors; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| wake_up(&vhost->work_wait_q); |
| } |
| |
| /** |
| * ibmvfc_npiv_login - Sends NPIV login |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_npiv_login_mad *mad; |
| struct ibmvfc_event *evt = ibmvfc_get_event(vhost); |
| |
| ibmvfc_gather_partition_info(vhost); |
| ibmvfc_set_login_info(vhost); |
| ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); |
| |
| memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); |
| mad = &evt->iu.npiv_login; |
| memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); |
| mad->common.version = 1; |
| mad->common.opcode = IBMVFC_NPIV_LOGIN; |
| mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); |
| mad->buffer.va = vhost->login_buf_dma; |
| mad->buffer.len = sizeof(*vhost->login_buf); |
| |
| memset(vhost->async_crq.msgs, 0, PAGE_SIZE); |
| vhost->async_crq.cur = 0; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); |
| |
| if (!ibmvfc_send_event(evt, vhost, default_timeout)) |
| ibmvfc_dbg(vhost, "Sent NPIV login\n"); |
| else |
| ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); |
| }; |
| |
| /** |
| * ibmvfc_dev_init_to_do - Is there target initialization work to do? |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT || |
| tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * __ibmvfc_work_to_do - Is there task level work to do? (no locking) |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| |
| if (kthread_should_stop()) |
| return 1; |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_NONE: |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| return 0; |
| case IBMVFC_HOST_ACTION_TGT_INIT: |
| case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| if (vhost->discovery_threads == disc_threads) |
| return 0; |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT) |
| return 1; |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) |
| return 0; |
| return 1; |
| case IBMVFC_HOST_ACTION_INIT: |
| case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| case IBMVFC_HOST_ACTION_TGT_ADD: |
| case IBMVFC_HOST_ACTION_TGT_DEL: |
| case IBMVFC_HOST_ACTION_QUERY: |
| default: |
| break; |
| }; |
| |
| return 1; |
| } |
| |
| /** |
| * ibmvfc_work_to_do - Is there task level work to do? |
| * @vhost: ibmvfc host struct |
| * |
| * Returns: |
| * 1 if work to do / 0 if not |
| **/ |
| static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) |
| { |
| unsigned long flags; |
| int rc; |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| rc = __ibmvfc_work_to_do(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_log_ae - Log async events if necessary |
| * @vhost: ibmvfc host struct |
| * @events: events to log |
| * |
| **/ |
| static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) |
| { |
| if (events & IBMVFC_AE_RSCN) |
| fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); |
| if ((events & IBMVFC_AE_LINKDOWN) && |
| vhost->state >= IBMVFC_HALTED) |
| fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); |
| if ((events & IBMVFC_AE_LINKUP) && |
| vhost->state == IBMVFC_INITIALIZING) |
| fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); |
| } |
| |
| /** |
| * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port |
| * @tgt: ibmvfc target struct |
| * |
| **/ |
| static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) |
| { |
| struct ibmvfc_host *vhost = tgt->vhost; |
| struct fc_rport *rport; |
| unsigned long flags; |
| |
| tgt_dbg(tgt, "Adding rport\n"); |
| rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| tgt->rport = rport; |
| ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); |
| if (rport) { |
| tgt_dbg(tgt, "rport add succeeded\n"); |
| rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; |
| rport->supported_classes = 0; |
| tgt->target_id = rport->scsi_target_id; |
| if (tgt->service_parms.class1_parms[0] & 0x80000000) |
| rport->supported_classes |= FC_COS_CLASS1; |
| if (tgt->service_parms.class2_parms[0] & 0x80000000) |
| rport->supported_classes |= FC_COS_CLASS2; |
| if (tgt->service_parms.class3_parms[0] & 0x80000000) |
| rport->supported_classes |= FC_COS_CLASS3; |
| } else |
| tgt_dbg(tgt, "rport add failed\n"); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_do_work - Do task level work |
| * @vhost: ibmvfc host struct |
| * |
| **/ |
| static void ibmvfc_do_work(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_target *tgt; |
| unsigned long flags; |
| struct fc_rport *rport; |
| |
| ibmvfc_log_ae(vhost, vhost->events_to_log); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| vhost->events_to_log = 0; |
| switch (vhost->action) { |
| case IBMVFC_HOST_ACTION_NONE: |
| case IBMVFC_HOST_ACTION_INIT_WAIT: |
| break; |
| case IBMVFC_HOST_ACTION_INIT: |
| BUG_ON(vhost->state != IBMVFC_INITIALIZING); |
| vhost->job_step(vhost); |
| break; |
| case IBMVFC_HOST_ACTION_QUERY: |
| list_for_each_entry(tgt, &vhost->targets, queue) |
| ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); |
| break; |
| case IBMVFC_HOST_ACTION_QUERY_TGTS: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| tgt->job_step(tgt); |
| break; |
| } |
| } |
| |
| if (!ibmvfc_dev_init_to_do(vhost)) |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); |
| break; |
| case IBMVFC_HOST_ACTION_TGT_DEL: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| tgt_dbg(tgt, "Deleting rport\n"); |
| rport = tgt->rport; |
| tgt->rport = NULL; |
| list_del(&tgt->queue); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| if (rport) |
| fc_remote_port_delete(rport); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| return; |
| } |
| } |
| |
| if (vhost->state == IBMVFC_INITIALIZING) { |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); |
| vhost->job_step = ibmvfc_discover_targets; |
| } else { |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| scsi_unblock_requests(vhost->host); |
| wake_up(&vhost->init_wait_q); |
| return; |
| } |
| break; |
| case IBMVFC_HOST_ACTION_ALLOC_TGTS: |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_alloc_targets(vhost); |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| break; |
| case IBMVFC_HOST_ACTION_TGT_INIT: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_INIT) { |
| tgt->job_step(tgt); |
| break; |
| } |
| } |
| |
| if (!ibmvfc_dev_init_to_do(vhost)) { |
| ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); |
| vhost->init_retries = 0; |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| scsi_unblock_requests(vhost->host); |
| return; |
| } |
| break; |
| case IBMVFC_HOST_ACTION_TGT_ADD: |
| list_for_each_entry(tgt, &vhost->targets, queue) { |
| if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| ibmvfc_tgt_add_rport(tgt); |
| return; |
| } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { |
| tgt_dbg(tgt, "Deleting rport\n"); |
| rport = tgt->rport; |
| tgt->rport = NULL; |
| list_del(&tgt->queue); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| if (rport) |
| fc_remote_port_delete(rport); |
| kref_put(&tgt->kref, ibmvfc_release_tgt); |
| return; |
| } |
| } |
| |
| if (vhost->reinit) { |
| vhost->reinit = 0; |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); |
| } else { |
| ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); |
| wake_up(&vhost->init_wait_q); |
| } |
| break; |
| default: |
| break; |
| }; |
| |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| } |
| |
| /** |
| * ibmvfc_work - Do task level work |
| * @data: ibmvfc host struct |
| * |
| * Returns: |
| * zero |
| **/ |
| static int ibmvfc_work(void *data) |
| { |
| struct ibmvfc_host *vhost = data; |
| int rc; |
| |
| set_user_nice(current, -20); |
| |
| while (1) { |
| rc = wait_event_interruptible(vhost->work_wait_q, |
| ibmvfc_work_to_do(vhost)); |
| |
| BUG_ON(rc); |
| |
| if (kthread_should_stop()) |
| break; |
| |
| ibmvfc_do_work(vhost); |
| } |
| |
| ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor |
| * @vhost: ibmvfc host struct |
| * |
| * Allocates a page for messages, maps it for dma, and registers |
| * the crq with the hypervisor. |
| * |
| * Return value: |
| * zero on success / other on failure |
| **/ |
| static int ibmvfc_init_crq(struct ibmvfc_host *vhost) |
| { |
| int rc, retrc = -ENOMEM; |
| struct device *dev = vhost->dev; |
| struct vio_dev *vdev = to_vio_dev(dev); |
| struct ibmvfc_crq_queue *crq = &vhost->crq; |
| |
| ENTER; |
| crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); |
| |
| if (!crq->msgs) |
| return -ENOMEM; |
| |
| crq->size = PAGE_SIZE / sizeof(*crq->msgs); |
| crq->msg_token = dma_map_single(dev, crq->msgs, |
| PAGE_SIZE, DMA_BIDIRECTIONAL); |
| |
| if (dma_mapping_error(dev, crq->msg_token)) |
| goto map_failed; |
| |
| retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| crq->msg_token, PAGE_SIZE); |
| |
| if (rc == H_RESOURCE) |
| /* maybe kexecing and resource is busy. try a reset */ |
| retrc = rc = ibmvfc_reset_crq(vhost); |
| |
| if (rc == H_CLOSED) |
| dev_warn(dev, "Partner adapter not ready\n"); |
| else if (rc) { |
| dev_warn(dev, "Error %d opening adapter\n", rc); |
| goto reg_crq_failed; |
| } |
| |
| retrc = 0; |
| |
| if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { |
| dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); |
| goto req_irq_failed; |
| } |
| |
| if ((rc = vio_enable_interrupts(vdev))) { |
| dev_err(dev, "Error %d enabling interrupts\n", rc); |
| goto req_irq_failed; |
| } |
| |
| crq->cur = 0; |
| LEAVE; |
| return retrc; |
| |
| req_irq_failed: |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| reg_crq_failed: |
| dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| map_failed: |
| free_page((unsigned long)crq->msgs); |
| return retrc; |
| } |
| |
| /** |
| * ibmvfc_free_mem - Free memory for vhost |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * none |
| **/ |
| static void ibmvfc_free_mem(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| |
| ENTER; |
| mempool_destroy(vhost->tgt_pool); |
| kfree(vhost->trace); |
| dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, |
| vhost->disc_buf_dma); |
| dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), |
| vhost->login_buf, vhost->login_buf_dma); |
| dma_pool_destroy(vhost->sg_pool); |
| dma_unmap_single(vhost->dev, async_q->msg_token, |
| async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| free_page((unsigned long)async_q->msgs); |
| LEAVE; |
| } |
| |
| /** |
| * ibmvfc_alloc_mem - Allocate memory for vhost |
| * @vhost: ibmvfc host struct |
| * |
| * Return value: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) |
| { |
| struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; |
| struct device *dev = vhost->dev; |
| |
| ENTER; |
| async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); |
| if (!async_q->msgs) { |
| dev_err(dev, "Couldn't allocate async queue.\n"); |
| goto nomem; |
| } |
| |
| async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); |
| async_q->msg_token = dma_map_single(dev, async_q->msgs, |
| async_q->size * sizeof(*async_q->msgs), |
| DMA_BIDIRECTIONAL); |
| |
| if (dma_mapping_error(dev, async_q->msg_token)) { |
| dev_err(dev, "Failed to map async queue\n"); |
| goto free_async_crq; |
| } |
| |
| vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, |
| SG_ALL * sizeof(struct srp_direct_buf), |
| sizeof(struct srp_direct_buf), 0); |
| |
| if (!vhost->sg_pool) { |
| dev_err(dev, "Failed to allocate sg pool\n"); |
| goto unmap_async_crq; |
| } |
| |
| vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), |
| &vhost->login_buf_dma, GFP_KERNEL); |
| |
| if (!vhost->login_buf) { |
| dev_err(dev, "Couldn't allocate NPIV login buffer\n"); |
| goto free_sg_pool; |
| } |
| |
| vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; |
| vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, |
| &vhost->disc_buf_dma, GFP_KERNEL); |
| |
| if (!vhost->disc_buf) { |
| dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); |
| goto free_login_buffer; |
| } |
| |
| vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, |
| sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); |
| |
| if (!vhost->trace) |
| goto free_disc_buffer; |
| |
| vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, |
| sizeof(struct ibmvfc_target)); |
| |
| if (!vhost->tgt_pool) { |
| dev_err(dev, "Couldn't allocate target memory pool\n"); |
| goto free_trace; |
| } |
| |
| LEAVE; |
| return 0; |
| |
| free_trace: |
| kfree(vhost->trace); |
| free_disc_buffer: |
| dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, |
| vhost->disc_buf_dma); |
| free_login_buffer: |
| dma_free_coherent(dev, sizeof(*vhost->login_buf), |
| vhost->login_buf, vhost->login_buf_dma); |
| free_sg_pool: |
| dma_pool_destroy(vhost->sg_pool); |
| unmap_async_crq: |
| dma_unmap_single(dev, async_q->msg_token, |
| async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); |
| free_async_crq: |
| free_page((unsigned long)async_q->msgs); |
| nomem: |
| LEAVE; |
| return -ENOMEM; |
| } |
| |
| /** |
| * ibmvfc_probe - Adapter hot plug add entry point |
| * @vdev: vio device struct |
| * @id: vio device id struct |
| * |
| * Return value: |
| * 0 on success / non-zero on failure |
| **/ |
| static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| { |
| struct ibmvfc_host *vhost; |
| struct Scsi_Host *shost; |
| struct device *dev = &vdev->dev; |
| int rc = -ENOMEM; |
| |
| ENTER; |
| shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); |
| if (!shost) { |
| dev_err(dev, "Couldn't allocate host data\n"); |
| goto out; |
| } |
| |
| shost->transportt = ibmvfc_transport_template; |
| shost->can_queue = max_requests; |
| shost->max_lun = max_lun; |
| shost->max_id = max_targets; |
| shost->max_sectors = IBMVFC_MAX_SECTORS; |
| shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; |
| shost->unique_id = shost->host_no; |
| |
| vhost = shost_priv(shost); |
| INIT_LIST_HEAD(&vhost->sent); |
| INIT_LIST_HEAD(&vhost->free); |
| INIT_LIST_HEAD(&vhost->targets); |
| sprintf(vhost->name, IBMVFC_NAME); |
| vhost->host = shost; |
| vhost->dev = dev; |
| vhost->partition_number = -1; |
| vhost->log_level = log_level; |
| strcpy(vhost->partition_name, "UNKNOWN"); |
| init_waitqueue_head(&vhost->work_wait_q); |
| init_waitqueue_head(&vhost->init_wait_q); |
| |
| if ((rc = ibmvfc_alloc_mem(vhost))) |
| goto free_scsi_host; |
| |
| vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, |
| shost->host_no); |
| |
| if (IS_ERR(vhost->work_thread)) { |
| dev_err(dev, "Couldn't create kernel thread: %ld\n", |
| PTR_ERR(vhost->work_thread)); |
| goto free_host_mem; |
| } |
| |
| if ((rc = ibmvfc_init_crq(vhost))) { |
| dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); |
| goto kill_kthread; |
| } |
| |
| if ((rc = ibmvfc_init_event_pool(vhost))) { |
| dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); |
| goto release_crq; |
| } |
| |
| if ((rc = scsi_add_host(shost, dev))) |
| goto release_event_pool; |
| |
| if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, |
| &ibmvfc_trace_attr))) { |
| dev_err(dev, "Failed to create trace file. rc=%d\n", rc); |
| goto remove_shost; |
| } |
| |
| dev_set_drvdata(dev, vhost); |
| spin_lock(&ibmvfc_driver_lock); |
| list_add_tail(&vhost->queue, &ibmvfc_head); |
| spin_unlock(&ibmvfc_driver_lock); |
| |
| ibmvfc_send_crq_init(vhost); |
| scsi_scan_host(shost); |
| return 0; |
| |
| remove_shost: |
| scsi_remove_host(shost); |
| release_event_pool: |
| ibmvfc_free_event_pool(vhost); |
| release_crq: |
| ibmvfc_release_crq_queue(vhost); |
| kill_kthread: |
| kthread_stop(vhost->work_thread); |
| free_host_mem: |
| ibmvfc_free_mem(vhost); |
| free_scsi_host: |
| scsi_host_put(shost); |
| out: |
| LEAVE; |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_remove - Adapter hot plug remove entry point |
| * @vdev: vio device struct |
| * |
| * Return value: |
| * 0 |
| **/ |
| static int ibmvfc_remove(struct vio_dev *vdev) |
| { |
| struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); |
| unsigned long flags; |
| |
| ENTER; |
| ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); |
| ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); |
| ibmvfc_wait_while_resetting(vhost); |
| ibmvfc_release_crq_queue(vhost); |
| kthread_stop(vhost->work_thread); |
| fc_remove_host(vhost->host); |
| scsi_remove_host(vhost->host); |
| |
| spin_lock_irqsave(vhost->host->host_lock, flags); |
| ibmvfc_purge_requests(vhost, DID_ERROR); |
| ibmvfc_free_event_pool(vhost); |
| spin_unlock_irqrestore(vhost->host->host_lock, flags); |
| |
| ibmvfc_free_mem(vhost); |
| spin_lock(&ibmvfc_driver_lock); |
| list_del(&vhost->queue); |
| spin_unlock(&ibmvfc_driver_lock); |
| scsi_host_put(vhost->host); |
| LEAVE; |
| return 0; |
| } |
| |
| /** |
| * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver |
| * @vdev: vio device struct |
| * |
| * Return value: |
| * Number of bytes the driver will need to DMA map at the same time in |
| * order to perform well. |
| */ |
| static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) |
| { |
| unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); |
| return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); |
| } |
| |
| static struct vio_device_id ibmvfc_device_table[] __devinitdata = { |
| {"fcp", "IBM,vfc-client"}, |
| { "", "" } |
| }; |
| MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); |
| |
| static struct vio_driver ibmvfc_driver = { |
| .id_table = ibmvfc_device_table, |
| .probe = ibmvfc_probe, |
| .remove = ibmvfc_remove, |
| .get_desired_dma = ibmvfc_get_desired_dma, |
| .driver = { |
| .name = IBMVFC_NAME, |
| .owner = THIS_MODULE, |
| } |
| }; |
| |
| static struct fc_function_template ibmvfc_transport_functions = { |
| .show_host_fabric_name = 1, |
| .show_host_node_name = 1, |
| .show_host_port_name = 1, |
| .show_host_supported_classes = 1, |
| .show_host_port_type = 1, |
| .show_host_port_id = 1, |
| |
| .get_host_port_state = ibmvfc_get_host_port_state, |
| .show_host_port_state = 1, |
| |
| .get_host_speed = ibmvfc_get_host_speed, |
| .show_host_speed = 1, |
| |
| .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, |
| .terminate_rport_io = ibmvfc_terminate_rport_io, |
| |
| .show_rport_maxframe_size = 1, |
| .show_rport_supported_classes = 1, |
| |
| .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, |
| .show_rport_dev_loss_tmo = 1, |
| |
| .get_starget_node_name = ibmvfc_get_starget_node_name, |
| .show_starget_node_name = 1, |
| |
| .get_starget_port_name = ibmvfc_get_starget_port_name, |
| .show_starget_port_name = 1, |
| |
| .get_starget_port_id = ibmvfc_get_starget_port_id, |
| .show_starget_port_id = 1, |
| }; |
| |
| /** |
| * ibmvfc_module_init - Initialize the ibmvfc module |
| * |
| * Return value: |
| * 0 on success / other on failure |
| **/ |
| static int __init ibmvfc_module_init(void) |
| { |
| int rc; |
| |
| if (!firmware_has_feature(FW_FEATURE_VIO)) |
| return -ENODEV; |
| |
| printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", |
| IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); |
| |
| ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); |
| if (!ibmvfc_transport_template) |
| return -ENOMEM; |
| |
| rc = vio_register_driver(&ibmvfc_driver); |
| if (rc) |
| fc_release_transport(ibmvfc_transport_template); |
| return rc; |
| } |
| |
| /** |
| * ibmvfc_module_exit - Teardown the ibmvfc module |
| * |
| * Return value: |
| * nothing |
| **/ |
| static void __exit ibmvfc_module_exit(void) |
| { |
| vio_unregister_driver(&ibmvfc_driver); |
| fc_release_transport(ibmvfc_transport_template); |
| } |
| |
| module_init(ibmvfc_module_init); |
| module_exit(ibmvfc_module_exit); |