5054 lines
138 KiB
C
5054 lines
138 KiB
C
/*
|
|
* 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/slab.h>
|
|
#include <linux/of.h>
|
|
#include <linux/pm.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 <scsi/scsi_bsg_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 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);
|
|
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(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_TRANSPORT_DISRUPTED, 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, 1, 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_ERROR, 0, 1, "invalid parameter" },
|
|
{ IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 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_ERROR, 0, 1, "transaction cancelled" },
|
|
{ IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" },
|
|
{ IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" },
|
|
{ IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" },
|
|
{ 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 void ibmvfc_npiv_logout(struct ibmvfc_host *);
|
|
|
|
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;
|
|
|
|
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:
|
|
if (action == IBMVFC_TGT_ACTION_DELETED_RPORT)
|
|
tgt->action = action;
|
|
case IBMVFC_TGT_ACTION_DELETED_RPORT:
|
|
break;
|
|
default:
|
|
if (action == IBMVFC_TGT_ACTION_DEL_RPORT)
|
|
tgt->add_rport = 0;
|
|
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_LOGO_WAIT:
|
|
if (vhost->action == IBMVFC_HOST_ACTION_LOGO)
|
|
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_DEL_FAILED:
|
|
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:
|
|
switch (vhost->action) {
|
|
case IBMVFC_HOST_ACTION_RESET:
|
|
case IBMVFC_HOST_ACTION_REENABLE:
|
|
break;
|
|
default:
|
|
vhost->action = action;
|
|
break;
|
|
};
|
|
break;
|
|
case IBMVFC_HOST_ACTION_LOGO:
|
|
case IBMVFC_HOST_ACTION_QUERY_TGTS:
|
|
case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
|
|
case IBMVFC_HOST_ACTION_NONE:
|
|
case IBMVFC_HOST_ACTION_RESET:
|
|
case IBMVFC_HOST_ACTION_REENABLE:
|
|
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_HOST_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)) {
|
|
memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
|
|
vhost->async_crq.cur = 0;
|
|
|
|
list_for_each_entry(tgt, &vhost->targets, queue)
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
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 = 0;
|
|
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);
|
|
tasklet_kill(&vhost->tasklet);
|
|
do {
|
|
if (rc)
|
|
msleep(100);
|
|
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
|
|
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
|
|
|
vhost->state = IBMVFC_NO_CRQ;
|
|
vhost->logged_in = 0;
|
|
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 = 0;
|
|
struct vio_dev *vdev = to_vio_dev(vhost->dev);
|
|
|
|
/* Re-enable the CRQ */
|
|
do {
|
|
if (rc)
|
|
msleep(100);
|
|
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 = 0;
|
|
unsigned long flags;
|
|
struct vio_dev *vdev = to_vio_dev(vhost->dev);
|
|
struct ibmvfc_crq_queue *crq = &vhost->crq;
|
|
|
|
/* Close the CRQ */
|
|
do {
|
|
if (rc)
|
|
msleep(100);
|
|
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
|
|
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
vhost->state = IBMVFC_NO_CRQ;
|
|
vhost->logged_in = 0;
|
|
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);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
|
|
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);
|
|
}
|
|
|
|
if (evt->eh_comp)
|
|
complete(evt->eh_comp);
|
|
|
|
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_hard_reset_host - Reset the connection to the server by breaking the CRQ
|
|
* @vhost: struct ibmvfc host to reset
|
|
**/
|
|
static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
|
|
{
|
|
ibmvfc_purge_requests(vhost, DID_ERROR);
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
|
|
}
|
|
|
|
/**
|
|
* __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)
|
|
{
|
|
if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT &&
|
|
!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
|
|
scsi_block_requests(vhost->host);
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO);
|
|
vhost->job_step = ibmvfc_npiv_logout;
|
|
wake_up(&vhost->work_wait_q);
|
|
} else
|
|
ibmvfc_hard_reset_host(vhost);
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_reset_host - Reset the connection to the server
|
|
* @vhost: ibmvfc host struct
|
|
**/
|
|
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
|
|
*
|
|
* Returns: 1 if init will be retried / 0 if not
|
|
*
|
|
**/
|
|
static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost)
|
|
{
|
|
int retry = 0;
|
|
|
|
if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) {
|
|
vhost->delay_init = 1;
|
|
if (++vhost->init_retries > IBMVFC_MAX_HOST_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_HOST_INIT_RETRIES)
|
|
__ibmvfc_reset_host(vhost);
|
|
else {
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT);
|
|
retry = 1;
|
|
}
|
|
}
|
|
|
|
wake_up(&vhost->work_wait_q);
|
|
return retry;
|
|
}
|
|
|
|
/**
|
|
* __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: %lld 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) &&
|
|
vhost->action == IBMVFC_HOST_ACTION_NONE),
|
|
(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->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;
|
|
login_info->flags = IBMVFC_FLUSH_ON_HALT;
|
|
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,
|
|
dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME);
|
|
|
|
location = of_get_property(of_node, "ibm,loc-code", NULL);
|
|
location = location ? location : dev_name(vhost->dev);
|
|
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;
|
|
evt->eh_comp = NULL;
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
scsi_dma_unmap(scmd);
|
|
if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL)
|
|
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);
|
|
}
|
|
|
|
mb();
|
|
|
|
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_relogin - Log back into the specified device
|
|
* @sdev: scsi device struct
|
|
*
|
|
**/
|
|
static void ibmvfc_relogin(struct scsi_device *sdev)
|
|
{
|
|
struct ibmvfc_host *vhost = shost_priv(sdev->host);
|
|
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
|
|
struct ibmvfc_target *tgt;
|
|
|
|
list_for_each_entry(tgt, &vhost->targets, queue) {
|
|
if (rport == tgt->rport) {
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
ibmvfc_reinit_host(vhost);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
u32 rsp_len = 0;
|
|
u32 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 && rsp_len <= 8)
|
|
memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len);
|
|
if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED))
|
|
ibmvfc_relogin(cmnd->device);
|
|
|
|
if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER)))
|
|
cmnd->result = (DID_ERROR << 16);
|
|
|
|
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);
|
|
}
|
|
|
|
if (evt->eh_comp)
|
|
complete(evt->eh_comp);
|
|
|
|
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_lck(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;
|
|
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;
|
|
}
|
|
|
|
static DEF_SCSI_QCMD(ibmvfc_queuecommand)
|
|
|
|
/**
|
|
* 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_bsg_timeout_done - Completion handler for cancelling BSG commands
|
|
* @evt: struct ibmvfc_event
|
|
*
|
|
**/
|
|
static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
|
|
{
|
|
struct ibmvfc_host *vhost = evt->vhost;
|
|
|
|
ibmvfc_free_event(evt);
|
|
vhost->aborting_passthru = 0;
|
|
dev_info(vhost->dev, "Passthru command cancelled\n");
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_bsg_timeout - Handle a BSG timeout
|
|
* @job: struct fc_bsg_job that timed out
|
|
*
|
|
* Returns:
|
|
* 0 on success / other on failure
|
|
**/
|
|
static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
|
|
{
|
|
struct ibmvfc_host *vhost = shost_priv(job->shost);
|
|
unsigned long port_id = (unsigned long)job->dd_data;
|
|
struct ibmvfc_event *evt;
|
|
struct ibmvfc_tmf *tmf;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
ENTER;
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
|
|
__ibmvfc_reset_host(vhost);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
vhost->aborting_passthru = 1;
|
|
evt = ibmvfc_get_event(vhost);
|
|
ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, 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 = port_id;
|
|
tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
|
|
tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY;
|
|
rc = ibmvfc_send_event(evt, vhost, default_timeout);
|
|
|
|
if (rc != 0) {
|
|
vhost->aborting_passthru = 0;
|
|
dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
|
|
rc = -EIO;
|
|
} else
|
|
dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
|
|
port_id);
|
|
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
|
|
LEAVE;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
|
|
* @vhost: struct ibmvfc_host to send command
|
|
* @port_id: port ID to send command
|
|
*
|
|
* Returns:
|
|
* 0 on success / other on failure
|
|
**/
|
|
static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
|
|
{
|
|
struct ibmvfc_port_login *plogi;
|
|
struct ibmvfc_target *tgt;
|
|
struct ibmvfc_event *evt;
|
|
union ibmvfc_iu rsp_iu;
|
|
unsigned long flags;
|
|
int rc = 0, issue_login = 1;
|
|
|
|
ENTER;
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
list_for_each_entry(tgt, &vhost->targets, queue) {
|
|
if (tgt->scsi_id == port_id) {
|
|
issue_login = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!issue_login)
|
|
goto unlock_out;
|
|
if (unlikely((rc = ibmvfc_host_chkready(vhost))))
|
|
goto unlock_out;
|
|
|
|
evt = ibmvfc_get_event(vhost);
|
|
ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
|
|
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 = port_id;
|
|
evt->sync_iu = &rsp_iu;
|
|
init_completion(&evt->comp);
|
|
|
|
rc = ibmvfc_send_event(evt, vhost, default_timeout);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
|
|
if (rc)
|
|
return -EIO;
|
|
|
|
wait_for_completion(&evt->comp);
|
|
|
|
if (rsp_iu.plogi.common.status)
|
|
rc = -EIO;
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
ibmvfc_free_event(evt);
|
|
unlock_out:
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
LEAVE;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_bsg_request - Handle a BSG request
|
|
* @job: struct fc_bsg_job to be executed
|
|
*
|
|
* Returns:
|
|
* 0 on success / other on failure
|
|
**/
|
|
static int ibmvfc_bsg_request(struct fc_bsg_job *job)
|
|
{
|
|
struct ibmvfc_host *vhost = shost_priv(job->shost);
|
|
struct fc_rport *rport = job->rport;
|
|
struct ibmvfc_passthru_mad *mad;
|
|
struct ibmvfc_event *evt;
|
|
union ibmvfc_iu rsp_iu;
|
|
unsigned long flags, port_id = -1;
|
|
unsigned int code = job->request->msgcode;
|
|
int rc = 0, req_seg, rsp_seg, issue_login = 0;
|
|
u32 fc_flags, rsp_len;
|
|
|
|
ENTER;
|
|
job->reply->reply_payload_rcv_len = 0;
|
|
if (rport)
|
|
port_id = rport->port_id;
|
|
|
|
switch (code) {
|
|
case FC_BSG_HST_ELS_NOLOGIN:
|
|
port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
|
|
(job->request->rqst_data.h_els.port_id[1] << 8) |
|
|
job->request->rqst_data.h_els.port_id[2];
|
|
case FC_BSG_RPT_ELS:
|
|
fc_flags = IBMVFC_FC_ELS;
|
|
break;
|
|
case FC_BSG_HST_CT:
|
|
issue_login = 1;
|
|
port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
|
|
(job->request->rqst_data.h_ct.port_id[1] << 8) |
|
|
job->request->rqst_data.h_ct.port_id[2];
|
|
case FC_BSG_RPT_CT:
|
|
fc_flags = IBMVFC_FC_CT_IU;
|
|
break;
|
|
default:
|
|
return -ENOTSUPP;
|
|
};
|
|
|
|
if (port_id == -1)
|
|
return -EINVAL;
|
|
if (!mutex_trylock(&vhost->passthru_mutex))
|
|
return -EBUSY;
|
|
|
|
job->dd_data = (void *)port_id;
|
|
req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
|
|
job->request_payload.sg_cnt, DMA_TO_DEVICE);
|
|
|
|
if (!req_seg) {
|
|
mutex_unlock(&vhost->passthru_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
|
|
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
|
|
|
|
if (!rsp_seg) {
|
|
dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
|
|
job->request_payload.sg_cnt, DMA_TO_DEVICE);
|
|
mutex_unlock(&vhost->passthru_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (req_seg > 1 || rsp_seg > 1) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (issue_login)
|
|
rc = ibmvfc_bsg_plogi(vhost, port_id);
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
|
|
if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
|
|
unlikely((rc = ibmvfc_host_chkready(vhost)))) {
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
goto out;
|
|
}
|
|
|
|
evt = ibmvfc_get_event(vhost);
|
|
ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
|
|
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 = job->request_payload.payload_len;
|
|
mad->iu.rsp_len = job->reply_payload.payload_len;
|
|
mad->iu.flags = fc_flags;
|
|
mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
|
|
|
|
mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list);
|
|
mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list);
|
|
mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list);
|
|
mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list);
|
|
mad->iu.scsi_id = port_id;
|
|
mad->iu.tag = (u64)evt;
|
|
rsp_len = mad->iu.rsp.len;
|
|
|
|
evt->sync_iu = &rsp_iu;
|
|
init_completion(&evt->comp);
|
|
rc = ibmvfc_send_event(evt, vhost, 0);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
|
|
if (rc) {
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
wait_for_completion(&evt->comp);
|
|
|
|
if (rsp_iu.passthru.common.status)
|
|
rc = -EIO;
|
|
else
|
|
job->reply->reply_payload_rcv_len = rsp_len;
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
ibmvfc_free_event(evt);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
job->reply->result = rc;
|
|
job->job_done(job);
|
|
rc = 0;
|
|
out:
|
|
dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
|
|
job->request_payload.sg_cnt, DMA_TO_DEVICE);
|
|
dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
|
|
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
|
|
mutex_unlock(&vhost->passthru_mutex);
|
|
LEAVE;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* 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 = NULL;
|
|
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)
|
|
rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
|
|
|
|
if (rsp_code) {
|
|
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_match_rport - Match function for specified remote port
|
|
* @evt: ibmvfc event struct
|
|
* @device: device to match (rport)
|
|
*
|
|
* Returns:
|
|
* 1 if event matches rport / 0 if event does not match rport
|
|
**/
|
|
static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport)
|
|
{
|
|
struct fc_rport *cmd_rport;
|
|
|
|
if (evt->cmnd) {
|
|
cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device));
|
|
if (cmd_rport == rport)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_match_target - Match function for specified target
|
|
* @evt: ibmvfc event struct
|
|
* @device: device to match (starget)
|
|
*
|
|
* Returns:
|
|
* 1 if event matches starget / 0 if event does not match starget
|
|
**/
|
|
static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
|
|
{
|
|
if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_match_lun - Match function for specified LUN
|
|
* @evt: ibmvfc event struct
|
|
* @device: device to match (sdev)
|
|
*
|
|
* Returns:
|
|
* 1 if event matches sdev / 0 if event does not match sdev
|
|
**/
|
|
static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
|
|
{
|
|
if (evt->cmnd && evt->cmnd->device == device)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_wait_for_ops - Wait for ops to complete
|
|
* @vhost: ibmvfc host struct
|
|
* @device: device to match (starget or sdev)
|
|
* @match: match function
|
|
*
|
|
* Returns:
|
|
* SUCCESS / FAILED
|
|
**/
|
|
static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
|
|
int (*match) (struct ibmvfc_event *, void *))
|
|
{
|
|
struct ibmvfc_event *evt;
|
|
DECLARE_COMPLETION_ONSTACK(comp);
|
|
int wait;
|
|
unsigned long flags;
|
|
signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ;
|
|
|
|
ENTER;
|
|
do {
|
|
wait = 0;
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
list_for_each_entry(evt, &vhost->sent, queue) {
|
|
if (match(evt, device)) {
|
|
evt->eh_comp = ∁
|
|
wait++;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
|
|
if (wait) {
|
|
timeout = wait_for_completion_timeout(&comp, timeout);
|
|
|
|
if (!timeout) {
|
|
wait = 0;
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
list_for_each_entry(evt, &vhost->sent, queue) {
|
|
if (match(evt, device)) {
|
|
evt->eh_comp = NULL;
|
|
wait++;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
if (wait)
|
|
dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
|
|
LEAVE;
|
|
return wait ? FAILED : SUCCESS;
|
|
}
|
|
}
|
|
} while (wait);
|
|
|
|
LEAVE;
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* 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 scsi_target *starget = scsi_target(sdev);
|
|
struct fc_rport *rport = starget_to_rport(starget);
|
|
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->logged_in) {
|
|
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);
|
|
if (!(vhost->login_buf->resp.capabilities & IBMVFC_CAN_SUPPRESS_ABTS))
|
|
type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
|
|
if (vhost->state == IBMVFC_ACTIVE)
|
|
tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
|
|
else
|
|
tmf->flags = ((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID);
|
|
tmf->cancel_key = (unsigned long)sdev->hostdata;
|
|
tmf->my_cancel_key = (unsigned long)starget->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);
|
|
/* If failure is received, the host adapter is most likely going
|
|
through reset, return success so the caller will wait for the command
|
|
being cancelled to get returned */
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
switch (status) {
|
|
case IBMVFC_MAD_DRIVER_FAILED:
|
|
case IBMVFC_MAD_CRQ_ERROR:
|
|
/* Host adapter most likely going through reset, return success to
|
|
the caller will wait for the command being cancelled to get returned */
|
|
return 0;
|
|
default:
|
|
return -EIO;
|
|
};
|
|
}
|
|
|
|
sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n");
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_match_key - Match function for specified cancel key
|
|
* @evt: ibmvfc event struct
|
|
* @key: cancel key to match
|
|
*
|
|
* Returns:
|
|
* 1 if event matches key / 0 if event does not match key
|
|
**/
|
|
static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key)
|
|
{
|
|
unsigned long cancel_key = (unsigned long)key;
|
|
|
|
if (evt->crq.format == IBMVFC_CMD_FORMAT &&
|
|
evt->iu.cmd.cancel_key == cancel_key)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_match_evt - Match function for specified event
|
|
* @evt: ibmvfc event struct
|
|
* @match: event to match
|
|
*
|
|
* Returns:
|
|
* 1 if event matches key / 0 if event does not match key
|
|
**/
|
|
static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match)
|
|
{
|
|
if (evt == match)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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 rc, rsp_rc = -EBUSY;
|
|
unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT;
|
|
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");
|
|
timeout = wait_for_completion_timeout(&evt->comp, timeout);
|
|
|
|
if (!timeout) {
|
|
rc = ibmvfc_cancel_all(sdev, 0);
|
|
if (!rc) {
|
|
rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
|
|
if (rc == SUCCESS)
|
|
rc = 0;
|
|
}
|
|
|
|
if (rc) {
|
|
sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n");
|
|
ibmvfc_reset_host(vhost);
|
|
rsp_rc = -EIO;
|
|
rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key);
|
|
|
|
if (rc == SUCCESS)
|
|
rsp_rc = 0;
|
|
|
|
rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt);
|
|
if (rc != SUCCESS) {
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
ibmvfc_hard_reset_host(vhost);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
rsp_rc = 0;
|
|
}
|
|
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (rsp_iu.cmd.status)
|
|
rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd);
|
|
|
|
if (rsp_code) {
|
|
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");
|
|
|
|
out:
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
ibmvfc_free_event(evt);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
return rsp_rc;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_eh_abort_handler - Abort a command
|
|
* @cmd: scsi command to abort
|
|
*
|
|
* Returns:
|
|
* SUCCESS / FAST_IO_FAIL / FAILED
|
|
**/
|
|
static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
|
|
{
|
|
struct scsi_device *sdev = cmd->device;
|
|
struct ibmvfc_host *vhost = shost_priv(sdev->host);
|
|
int cancel_rc, block_rc;
|
|
int rc = FAILED;
|
|
|
|
ENTER;
|
|
block_rc = fc_block_scsi_eh(cmd);
|
|
ibmvfc_wait_while_resetting(vhost);
|
|
if (block_rc != FAST_IO_FAIL) {
|
|
cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
|
|
ibmvfc_abort_task_set(sdev);
|
|
} else
|
|
cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
|
|
|
|
if (!cancel_rc)
|
|
rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
|
|
|
|
if (block_rc == FAST_IO_FAIL && rc != FAILED)
|
|
rc = FAST_IO_FAIL;
|
|
|
|
LEAVE;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_eh_device_reset_handler - Reset a single LUN
|
|
* @cmd: scsi command struct
|
|
*
|
|
* Returns:
|
|
* SUCCESS / FAST_IO_FAIL / FAILED
|
|
**/
|
|
static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
|
|
{
|
|
struct scsi_device *sdev = cmd->device;
|
|
struct ibmvfc_host *vhost = shost_priv(sdev->host);
|
|
int cancel_rc, block_rc, reset_rc = 0;
|
|
int rc = FAILED;
|
|
|
|
ENTER;
|
|
block_rc = fc_block_scsi_eh(cmd);
|
|
ibmvfc_wait_while_resetting(vhost);
|
|
if (block_rc != FAST_IO_FAIL) {
|
|
cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
|
|
reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
|
|
} else
|
|
cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
|
|
|
|
if (!cancel_rc && !reset_rc)
|
|
rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
|
|
|
|
if (block_rc == FAST_IO_FAIL && rc != FAILED)
|
|
rc = FAST_IO_FAIL;
|
|
|
|
LEAVE;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function
|
|
* @sdev: scsi device struct
|
|
* @data: return code
|
|
*
|
|
**/
|
|
static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
|
|
{
|
|
unsigned long *rc = data;
|
|
*rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
|
|
* @sdev: scsi device struct
|
|
* @data: return code
|
|
*
|
|
**/
|
|
static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
|
|
{
|
|
unsigned long *rc = data;
|
|
*rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_eh_target_reset_handler - Reset the target
|
|
* @cmd: scsi command struct
|
|
*
|
|
* Returns:
|
|
* SUCCESS / FAST_IO_FAIL / FAILED
|
|
**/
|
|
static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
|
|
{
|
|
struct scsi_device *sdev = cmd->device;
|
|
struct ibmvfc_host *vhost = shost_priv(sdev->host);
|
|
struct scsi_target *starget = scsi_target(sdev);
|
|
int block_rc;
|
|
int reset_rc = 0;
|
|
int rc = FAILED;
|
|
unsigned long cancel_rc = 0;
|
|
|
|
ENTER;
|
|
block_rc = fc_block_scsi_eh(cmd);
|
|
ibmvfc_wait_while_resetting(vhost);
|
|
if (block_rc != FAST_IO_FAIL) {
|
|
starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
|
|
reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
|
|
} else
|
|
starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
|
|
|
|
if (!cancel_rc && !reset_rc)
|
|
rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
|
|
|
|
if (block_rc == FAST_IO_FAIL && rc != FAILED)
|
|
rc = FAST_IO_FAIL;
|
|
|
|
LEAVE;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* 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, block_rc;
|
|
struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
|
|
|
|
block_rc = fc_block_scsi_eh(cmd);
|
|
dev_err(vhost->dev, "Resetting connection due to error recovery\n");
|
|
rc = ibmvfc_issue_fc_host_lip(vhost->host);
|
|
|
|
if (block_rc == FAST_IO_FAIL)
|
|
return FAST_IO_FAIL;
|
|
|
|
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_Host *shost = rport_to_shost(rport);
|
|
struct ibmvfc_host *vhost = shost_priv(shost);
|
|
struct fc_rport *dev_rport;
|
|
struct scsi_device *sdev;
|
|
unsigned long rc;
|
|
|
|
ENTER;
|
|
shost_for_each_device(sdev, shost) {
|
|
dev_rport = starget_to_rport(scsi_target(sdev));
|
|
if (dev_rport != rport)
|
|
continue;
|
|
ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
|
|
}
|
|
|
|
rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport);
|
|
|
|
if (rc == FAILED)
|
|
ibmvfc_issue_fc_host_lip(shost);
|
|
LEAVE;
|
|
}
|
|
|
|
static const struct ibmvfc_async_desc ae_desc [] = {
|
|
{ "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
|
|
{ "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
|
|
{ "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
|
|
{ "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
|
|
{ "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 },
|
|
{ "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
{ "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL },
|
|
};
|
|
|
|
static const struct ibmvfc_async_desc unknown_ae = {
|
|
"Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL
|
|
};
|
|
|
|
/**
|
|
* ibmvfc_get_ae_desc - Get text description for async event
|
|
* @ae: async event
|
|
*
|
|
**/
|
|
static const struct ibmvfc_async_desc *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];
|
|
|
|
return &unknown_ae;
|
|
}
|
|
|
|
static const struct {
|
|
enum ibmvfc_ae_link_state state;
|
|
const char *desc;
|
|
} link_desc [] = {
|
|
{ IBMVFC_AE_LS_LINK_UP, " link up" },
|
|
{ IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" },
|
|
{ IBMVFC_AE_LS_LINK_DOWN, " link down" },
|
|
{ IBMVFC_AE_LS_LINK_DEAD, " link dead" },
|
|
};
|
|
|
|
/**
|
|
* ibmvfc_get_link_state - Get text description for link state
|
|
* @state: link state
|
|
*
|
|
**/
|
|
static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(link_desc); i++)
|
|
if (link_desc[i].state == state)
|
|
return link_desc[i].desc;
|
|
|
|
return "";
|
|
}
|
|
|
|
/**
|
|
* 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 struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event);
|
|
struct ibmvfc_target *tgt;
|
|
|
|
ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx,"
|
|
" node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name,
|
|
ibmvfc_get_link_state(crq->link_state));
|
|
|
|
switch (crq->event) {
|
|
case IBMVFC_AE_RESUME:
|
|
switch (crq->link_state) {
|
|
case IBMVFC_AE_LS_LINK_DOWN:
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
|
|
break;
|
|
case IBMVFC_AE_LS_LINK_DEAD:
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
|
|
break;
|
|
case IBMVFC_AE_LS_LINK_UP:
|
|
case IBMVFC_AE_LS_LINK_BOUNCED:
|
|
default:
|
|
vhost->events_to_log |= IBMVFC_AE_LINKUP;
|
|
vhost->delay_init = 1;
|
|
__ibmvfc_reset_host(vhost);
|
|
break;
|
|
};
|
|
|
|
break;
|
|
case IBMVFC_AE_LINK_UP:
|
|
vhost->events_to_log |= IBMVFC_AE_LINKUP;
|
|
vhost->delay_init = 1;
|
|
__ibmvfc_reset_host(vhost);
|
|
break;
|
|
case IBMVFC_AE_SCN_FABRIC:
|
|
case IBMVFC_AE_SCN_DOMAIN:
|
|
vhost->events_to_log |= IBMVFC_AE_RSCN;
|
|
if (vhost->state < IBMVFC_HALTED) {
|
|
vhost->delay_init = 1;
|
|
__ibmvfc_reset_host(vhost);
|
|
}
|
|
break;
|
|
case IBMVFC_AE_SCN_NPORT:
|
|
case IBMVFC_AE_SCN_GROUP:
|
|
vhost->events_to_log |= IBMVFC_AE_RSCN;
|
|
ibmvfc_reinit_host(vhost);
|
|
break;
|
|
case IBMVFC_AE_ELS_LOGO:
|
|
case IBMVFC_AE_ELS_PRLO:
|
|
case IBMVFC_AE_ELS_PLOGI:
|
|
list_for_each_entry(tgt, &vhost->targets, queue) {
|
|
if (!crq->scsi_id && !crq->wwpn && !crq->node_name)
|
|
break;
|
|
if (crq->scsi_id && tgt->scsi_id != crq->scsi_id)
|
|
continue;
|
|
if (crq->wwpn && tgt->ids.port_name != crq->wwpn)
|
|
continue;
|
|
if (crq->node_name && tgt->ids.node_name != crq->node_name)
|
|
continue;
|
|
if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO)
|
|
tgt->logo_rcvd = 1;
|
|
if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) {
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
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: %lld\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;
|
|
vhost->logged_in = 0;
|
|
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);
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
|
|
} else {
|
|
dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
|
|
ibmvfc_purge_requests(vhost, DID_ERROR);
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
|
|
}
|
|
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%08llx is invalid!\n",
|
|
crq->ioba);
|
|
return;
|
|
}
|
|
|
|
if (unlikely(atomic_read(&evt->free))) {
|
|
dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\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->scan_complete)
|
|
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_target_alloc - Setup the target's task set value
|
|
* @starget: struct scsi_target
|
|
*
|
|
* Set the target's task set value so that error handling works as
|
|
* expected.
|
|
*
|
|
* Returns:
|
|
* 0 on success / -ENXIO if device does not exist
|
|
**/
|
|
static int ibmvfc_target_alloc(struct scsi_target *starget)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
struct ibmvfc_host *vhost = shost_priv(shost);
|
|
unsigned long flags = 0;
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
starget->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;
|
|
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);
|
|
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
|
|
* @reason: calling context
|
|
*
|
|
* Return value:
|
|
* actual depth set
|
|
**/
|
|
static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth,
|
|
int reason)
|
|
{
|
|
if (reason != SCSI_QDEPTH_DEFAULT)
|
|
return -EOPNOTSUPP;
|
|
|
|
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 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 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 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 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 ssize_t ibmvfc_show_host_capabilities(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, "%llx\n", vhost->login_buf->resp.capabilities);
|
|
}
|
|
|
|
/**
|
|
* 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 DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL);
|
|
static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL);
|
|
static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL);
|
|
static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL);
|
|
static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL);
|
|
static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL);
|
|
static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR,
|
|
ibmvfc_show_log_level, ibmvfc_store_log_level);
|
|
|
|
#ifdef CONFIG_SCSI_IBMVFC_TRACE
|
|
/**
|
|
* ibmvfc_read_trace - Dump the adapter trace
|
|
* @filp: open sysfs file
|
|
* @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 file *filp, 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[] = {
|
|
&dev_attr_partition_name,
|
|
&dev_attr_device_name,
|
|
&dev_attr_port_loc_code,
|
|
&dev_attr_drc_name,
|
|
&dev_attr_npiv_version,
|
|
&dev_attr_capabilities,
|
|
&dev_attr_log_level,
|
|
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,
|
|
.target_alloc = ibmvfc_target_alloc,
|
|
.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;
|
|
rmb();
|
|
} 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;
|
|
rmb();
|
|
} 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;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
vio_disable_interrupts(to_vio_dev(vhost->dev));
|
|
tasklet_schedule(&vhost->tasklet);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_tasklet - Interrupt handler tasklet
|
|
* @data: ibmvfc host struct
|
|
*
|
|
* Returns:
|
|
* Nothing
|
|
**/
|
|
static void ibmvfc_tasklet(void *data)
|
|
{
|
|
struct ibmvfc_host *vhost = data;
|
|
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);
|
|
while (!done) {
|
|
/* 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;
|
|
wmb();
|
|
}
|
|
|
|
/* Pull all the valid messages off the CRQ */
|
|
while ((crq = ibmvfc_next_crq(vhost)) != NULL) {
|
|
ibmvfc_handle_crq(crq, vhost);
|
|
crq->valid = 0;
|
|
wmb();
|
|
}
|
|
|
|
vio_enable_interrupts(vdev);
|
|
if ((async = ibmvfc_next_async_crq(vhost)) != NULL) {
|
|
vio_disable_interrupts(vdev);
|
|
ibmvfc_handle_async(async, vhost);
|
|
async->valid = 0;
|
|
wmb();
|
|
} else if ((crq = ibmvfc_next_crq(vhost)) != NULL) {
|
|
vio_disable_interrupts(vdev);
|
|
ibmvfc_handle_crq(crq, vhost);
|
|
crq->valid = 0;
|
|
wmb();
|
|
} else
|
|
done = 1;
|
|
}
|
|
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*
|
|
* Returns: 1 if step will be retried / 0 if not
|
|
*
|
|
**/
|
|
static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt,
|
|
void (*job_step) (struct ibmvfc_target *))
|
|
{
|
|
if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) {
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
wake_up(&tgt->vhost->work_wait_q);
|
|
return 0;
|
|
} else
|
|
ibmvfc_init_tgt(tgt, job_step);
|
|
return 1;
|
|
}
|
|
|
|
/* Defined in FC-LS */
|
|
static const struct {
|
|
int code;
|
|
int retry;
|
|
int logged_in;
|
|
} prli_rsp [] = {
|
|
{ 0, 1, 0 },
|
|
{ 1, 0, 1 },
|
|
{ 2, 1, 0 },
|
|
{ 3, 1, 0 },
|
|
{ 4, 0, 0 },
|
|
{ 5, 0, 0 },
|
|
{ 6, 0, 1 },
|
|
{ 7, 0, 0 },
|
|
{ 8, 1, 0 },
|
|
};
|
|
|
|
/**
|
|
* ibmvfc_get_prli_rsp - Find PRLI response index
|
|
* @flags: PRLI response flags
|
|
*
|
|
**/
|
|
static int ibmvfc_get_prli_rsp(u16 flags)
|
|
{
|
|
int i;
|
|
int code = (flags & 0x0f00) >> 8;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(prli_rsp); i++)
|
|
if (prli_rsp[i].code == code)
|
|
return i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
struct ibmvfc_prli_svc_parms *parms = &rsp->parms;
|
|
u32 status = rsp->common.status;
|
|
int index, level = IBMVFC_DEFAULT_LOG_LEVEL;
|
|
|
|
vhost->discovery_threads--;
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
|
|
switch (status) {
|
|
case IBMVFC_MAD_SUCCESS:
|
|
tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n",
|
|
parms->type, parms->flags, parms->service_parms);
|
|
|
|
if (parms->type == IBMVFC_SCSI_FCP_TYPE) {
|
|
index = ibmvfc_get_prli_rsp(parms->flags);
|
|
if (prli_rsp[index].logged_in) {
|
|
if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) {
|
|
tgt->need_login = 0;
|
|
tgt->ids.roles = 0;
|
|
if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC)
|
|
tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET;
|
|
if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC)
|
|
tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR;
|
|
tgt->add_rport = 1;
|
|
} else
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
} else if (prli_rsp[index].retry)
|
|
ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
|
|
else
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
} else
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_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:
|
|
if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED)
|
|
level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
|
|
else if (tgt->logo_rcvd)
|
|
level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
|
|
else if (ibmvfc_retry_cmd(rsp->status, rsp->error))
|
|
level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli);
|
|
else
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
|
|
tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n",
|
|
ibmvfc_get_cmd_error(rsp->status, rsp->error),
|
|
rsp->status, rsp->error, status);
|
|
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;
|
|
int level = IBMVFC_DEFAULT_LOG_LEVEL;
|
|
|
|
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;
|
|
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:
|
|
if (ibmvfc_retry_cmd(rsp->status, rsp->error))
|
|
level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi);
|
|
else
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
|
|
tgt_log(tgt, level, "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);
|
|
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);
|
|
tgt->logo_rcvd = 0;
|
|
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);
|
|
del_timer(&tgt->timer);
|
|
|
|
switch (status) {
|
|
case IBMVFC_MAD_SUCCESS:
|
|
tgt_dbg(tgt, "ADISC succeeded\n");
|
|
if (ibmvfc_adisc_needs_plogi(mad, tgt))
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
break;
|
|
case IBMVFC_MAD_DRIVER_FAILED:
|
|
break;
|
|
case IBMVFC_MAD_FAILED:
|
|
default:
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
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_cancel_done - Completion handler when cancelling an ADISC
|
|
* @evt: ibmvfc event struct
|
|
*
|
|
* Just cleanup this event struct. Everything else is handled by
|
|
* the ADISC completion handler. If the ADISC never actually comes
|
|
* back, we still have the timer running on the ADISC event struct
|
|
* which will fire and cause the CRQ to get reset.
|
|
*
|
|
**/
|
|
static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt)
|
|
{
|
|
struct ibmvfc_host *vhost = evt->vhost;
|
|
struct ibmvfc_target *tgt = evt->tgt;
|
|
|
|
tgt_dbg(tgt, "ADISC cancel complete\n");
|
|
vhost->abort_threads--;
|
|
ibmvfc_free_event(evt);
|
|
kref_put(&tgt->kref, ibmvfc_release_tgt);
|
|
wake_up(&vhost->work_wait_q);
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_adisc_timeout - Handle an ADISC timeout
|
|
* @tgt: ibmvfc target struct
|
|
*
|
|
* If an ADISC times out, send a cancel. If the cancel times
|
|
* out, reset the CRQ. When the ADISC comes back as cancelled,
|
|
* log back into the target.
|
|
**/
|
|
static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt)
|
|
{
|
|
struct ibmvfc_host *vhost = tgt->vhost;
|
|
struct ibmvfc_event *evt;
|
|
struct ibmvfc_tmf *tmf;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
tgt_dbg(tgt, "ADISC timeout\n");
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
if (vhost->abort_threads >= disc_threads ||
|
|
tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT ||
|
|
vhost->state != IBMVFC_INITIALIZING ||
|
|
vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) {
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
return;
|
|
}
|
|
|
|
vhost->abort_threads++;
|
|
kref_get(&tgt->kref);
|
|
evt = ibmvfc_get_event(vhost);
|
|
ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT);
|
|
|
|
evt->tgt = tgt;
|
|
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 = tgt->scsi_id;
|
|
tmf->cancel_key = tgt->cancel_key;
|
|
|
|
rc = ibmvfc_send_event(evt, vhost, default_timeout);
|
|
|
|
if (rc) {
|
|
tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc);
|
|
vhost->abort_threads--;
|
|
kref_put(&tgt->kref, ibmvfc_release_tgt);
|
|
__ibmvfc_reset_host(vhost);
|
|
} else
|
|
tgt_dbg(tgt, "Attempting to cancel ADISC\n");
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_tgt_adisc - Initiate an ADISC for specified target
|
|
* @tgt: ibmvfc target struct
|
|
*
|
|
* When sending an ADISC we end up with two timers running. The
|
|
* first timer is the timer in the ibmvfc target struct. If this
|
|
* fires, we send a cancel to the target. The second timer is the
|
|
* timer on the ibmvfc event for the ADISC, which is longer. If that
|
|
* fires, it means the ADISC timed out and our attempt to cancel it
|
|
* also failed, so we need to reset the CRQ.
|
|
**/
|
|
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->iu.cancel_key = tgt->cancel_key;
|
|
|
|
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;
|
|
|
|
if (timer_pending(&tgt->timer))
|
|
mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ));
|
|
else {
|
|
tgt->timer.data = (unsigned long) tgt;
|
|
tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ);
|
|
tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout;
|
|
add_timer(&tgt->timer);
|
|
}
|
|
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
|
|
if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) {
|
|
vhost->discovery_threads--;
|
|
del_timer(&tgt->timer);
|
|
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;
|
|
int level = IBMVFC_DEFAULT_LOG_LEVEL;
|
|
|
|
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:
|
|
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))
|
|
level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target);
|
|
else
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT);
|
|
|
|
tgt_log(tgt, level, "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);
|
|
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_NOIO);
|
|
if (!tgt) {
|
|
dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
|
|
scsi_id);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(tgt, 0, sizeof(*tgt));
|
|
tgt->scsi_id = scsi_id;
|
|
tgt->new_scsi_id = scsi_id;
|
|
tgt->vhost = vhost;
|
|
tgt->need_login = 1;
|
|
tgt->cancel_key = vhost->task_set++;
|
|
init_timer(&tgt->timer);
|
|
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;
|
|
int level = IBMVFC_DEFAULT_LOG_LEVEL;
|
|
|
|
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:
|
|
level += ibmvfc_retry_host_init(vhost);
|
|
ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n",
|
|
ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
|
|
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;
|
|
int level = IBMVFC_DEFAULT_LOG_LEVEL;
|
|
|
|
switch (mad_status) {
|
|
case IBMVFC_MAD_SUCCESS:
|
|
ibmvfc_free_event(evt);
|
|
break;
|
|
case IBMVFC_MAD_FAILED:
|
|
if (ibmvfc_retry_cmd(rsp->status, rsp->error))
|
|
level += ibmvfc_retry_host_init(vhost);
|
|
else
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
|
|
ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n",
|
|
ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error);
|
|
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;
|
|
}
|
|
|
|
vhost->logged_in = 1;
|
|
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);
|
|
|
|
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_npiv_logout_done - Completion handler for NPIV Logout
|
|
* @vhost: ibmvfc host struct
|
|
*
|
|
**/
|
|
static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt)
|
|
{
|
|
struct ibmvfc_host *vhost = evt->vhost;
|
|
u32 mad_status = evt->xfer_iu->npiv_logout.common.status;
|
|
|
|
ibmvfc_free_event(evt);
|
|
|
|
switch (mad_status) {
|
|
case IBMVFC_MAD_SUCCESS:
|
|
if (list_empty(&vhost->sent) &&
|
|
vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) {
|
|
ibmvfc_init_host(vhost);
|
|
return;
|
|
}
|
|
break;
|
|
case IBMVFC_MAD_FAILED:
|
|
case IBMVFC_MAD_NOT_SUPPORTED:
|
|
case IBMVFC_MAD_CRQ_ERROR:
|
|
case IBMVFC_MAD_DRIVER_FAILED:
|
|
default:
|
|
ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status);
|
|
break;
|
|
}
|
|
|
|
ibmvfc_hard_reset_host(vhost);
|
|
}
|
|
|
|
/**
|
|
* ibmvfc_npiv_logout - Issue an NPIV Logout
|
|
* @vhost: ibmvfc host struct
|
|
*
|
|
**/
|
|
static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost)
|
|
{
|
|
struct ibmvfc_npiv_logout_mad *mad;
|
|
struct ibmvfc_event *evt;
|
|
|
|
evt = ibmvfc_get_event(vhost);
|
|
ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT);
|
|
|
|
mad = &evt->iu.npiv_logout;
|
|
memset(mad, 0, sizeof(*mad));
|
|
mad->common.version = 1;
|
|
mad->common.opcode = IBMVFC_NPIV_LOGOUT;
|
|
mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad);
|
|
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT);
|
|
|
|
if (!ibmvfc_send_event(evt, vhost, default_timeout))
|
|
ibmvfc_dbg(vhost, "Sent NPIV logout\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:
|
|
case IBMVFC_HOST_ACTION_LOGO_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_LOGO:
|
|
case IBMVFC_HOST_ACTION_INIT:
|
|
case IBMVFC_HOST_ACTION_ALLOC_TGTS:
|
|
case IBMVFC_HOST_ACTION_TGT_DEL:
|
|
case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
|
|
case IBMVFC_HOST_ACTION_QUERY:
|
|
case IBMVFC_HOST_ACTION_RESET:
|
|
case IBMVFC_HOST_ACTION_REENABLE:
|
|
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);
|
|
|
|
if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) {
|
|
tgt_dbg(tgt, "Deleting rport\n");
|
|
list_del(&tgt->queue);
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
fc_remote_port_delete(rport);
|
|
del_timer_sync(&tgt->timer);
|
|
kref_put(&tgt->kref, ibmvfc_release_tgt);
|
|
return;
|
|
} else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) {
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
return;
|
|
}
|
|
|
|
if (rport) {
|
|
tgt_dbg(tgt, "rport add succeeded\n");
|
|
tgt->rport = rport;
|
|
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;
|
|
if (rport->rqst_q)
|
|
blk_queue_max_segments(rport->rqst_q, 1);
|
|
} 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;
|
|
int rc;
|
|
|
|
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_LOGO_WAIT:
|
|
case IBMVFC_HOST_ACTION_INIT_WAIT:
|
|
break;
|
|
case IBMVFC_HOST_ACTION_RESET:
|
|
vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
rc = ibmvfc_reset_crq(vhost);
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
if (rc == H_CLOSED)
|
|
vio_enable_interrupts(to_vio_dev(vhost->dev));
|
|
if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
|
|
(rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
|
|
dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
|
|
}
|
|
break;
|
|
case IBMVFC_HOST_ACTION_REENABLE:
|
|
vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
rc = ibmvfc_reenable_crq_queue(vhost);
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
|
|
ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
|
|
dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
|
|
}
|
|
break;
|
|
case IBMVFC_HOST_ACTION_LOGO:
|
|
vhost->job_step(vhost);
|
|
break;
|
|
case IBMVFC_HOST_ACTION_INIT:
|
|
BUG_ON(vhost->state != IBMVFC_INITIALIZING);
|
|
if (vhost->delay_init) {
|
|
vhost->delay_init = 0;
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
ssleep(15);
|
|
return;
|
|
} else
|
|
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:
|
|
case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
|
|
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);
|
|
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
if (rport)
|
|
fc_remote_port_delete(rport);
|
|
del_timer_sync(&tgt->timer);
|
|
kref_put(&tgt->kref, ibmvfc_release_tgt);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (vhost->state == IBMVFC_INITIALIZING) {
|
|
if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) {
|
|
if (vhost->reinit) {
|
|
vhost->reinit = 0;
|
|
scsi_block_requests(vhost->host);
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
} else {
|
|
ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE);
|
|
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
|
|
wake_up(&vhost->init_wait_q);
|
|
schedule_work(&vhost->rport_add_work_q);
|
|
vhost->init_retries = 0;
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
scsi_unblock_requests(vhost->host);
|
|
}
|
|
|
|
return;
|
|
} else {
|
|
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_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED);
|
|
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;
|
|
|
|
tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost);
|
|
|
|
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:
|
|
tasklet_kill(&vhost->tasklet);
|
|
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_kmalloc_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_rport_add_thread - Worker thread for rport adds
|
|
* @work: work struct
|
|
*
|
|
**/
|
|
static void ibmvfc_rport_add_thread(struct work_struct *work)
|
|
{
|
|
struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host,
|
|
rport_add_work_q);
|
|
struct ibmvfc_target *tgt;
|
|
struct fc_rport *rport;
|
|
unsigned long flags;
|
|
int did_work;
|
|
|
|
ENTER;
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
do {
|
|
did_work = 0;
|
|
if (vhost->state != IBMVFC_ACTIVE)
|
|
break;
|
|
|
|
list_for_each_entry(tgt, &vhost->targets, queue) {
|
|
if (tgt->add_rport) {
|
|
did_work = 1;
|
|
tgt->add_rport = 0;
|
|
kref_get(&tgt->kref);
|
|
rport = tgt->rport;
|
|
if (!rport) {
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
ibmvfc_tgt_add_rport(tgt);
|
|
} else if (get_device(&rport->dev)) {
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
tgt_dbg(tgt, "Setting rport roles\n");
|
|
fc_remote_port_rolechg(rport, tgt->ids.roles);
|
|
put_device(&rport->dev);
|
|
}
|
|
|
|
kref_put(&tgt->kref, ibmvfc_release_tgt);
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
break;
|
|
}
|
|
}
|
|
} while(did_work);
|
|
|
|
if (vhost->state == IBMVFC_ACTIVE)
|
|
vhost->scan_complete = 1;
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
LEAVE;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
vhost->task_set = 1;
|
|
strcpy(vhost->partition_name, "UNKNOWN");
|
|
init_waitqueue_head(&vhost->work_wait_q);
|
|
init_waitqueue_head(&vhost->init_wait_q);
|
|
INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
|
|
mutex_init(&vhost->passthru_mutex);
|
|
|
|
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;
|
|
|
|
fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO;
|
|
|
|
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;
|
|
}
|
|
|
|
if (shost_to_fc_host(shost)->rqst_q)
|
|
blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
|
|
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);
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
|
|
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_resume - Resume from suspend
|
|
* @dev: device struct
|
|
*
|
|
* We may have lost an interrupt across suspend/resume, so kick the
|
|
* interrupt handler
|
|
*
|
|
*/
|
|
static int ibmvfc_resume(struct device *dev)
|
|
{
|
|
unsigned long flags;
|
|
struct ibmvfc_host *vhost = dev_get_drvdata(dev);
|
|
struct vio_dev *vdev = to_vio_dev(dev);
|
|
|
|
spin_lock_irqsave(vhost->host->host_lock, flags);
|
|
vio_disable_interrupts(vdev);
|
|
tasklet_schedule(&vhost->tasklet);
|
|
spin_unlock_irqrestore(vhost->host->host_lock, flags);
|
|
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[] = {
|
|
{"fcp", "IBM,vfc-client"},
|
|
{ "", "" }
|
|
};
|
|
MODULE_DEVICE_TABLE(vio, ibmvfc_device_table);
|
|
|
|
static struct dev_pm_ops ibmvfc_pm_ops = {
|
|
.resume = ibmvfc_resume
|
|
};
|
|
|
|
static struct vio_driver ibmvfc_driver = {
|
|
.id_table = ibmvfc_device_table,
|
|
.probe = ibmvfc_probe,
|
|
.remove = ibmvfc_remove,
|
|
.get_desired_dma = ibmvfc_get_desired_dma,
|
|
.name = IBMVFC_NAME,
|
|
.pm = &ibmvfc_pm_ops,
|
|
};
|
|
|
|
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,
|
|
.show_host_maxframe_size = 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,
|
|
|
|
.bsg_request = ibmvfc_bsg_request,
|
|
.bsg_timeout = ibmvfc_bsg_timeout,
|
|
};
|
|
|
|
/**
|
|
* 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);
|