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linux/drivers/s390/scsi/zfcp_fsf.c
Christof Schmitt 3765138ae9 [SCSI] zfcp: Fix request list handling in error path 
Fix the handling of the request list in the error path:
 - Use irqsave for the lock as in the good path.
 - Before removing the request, check if it is still in the list, a
   call to dismiss_all might have changed the list in between.
 - zfcp_qdio_send does not change the queue counters on failure,
   trying revert something is wrong, so remove this.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-11-05 12:46:39 -05:00

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/*
* zfcp device driver
*
* Implementation of FSF commands.
*
* Copyright IBM Corporation 2002, 2008
*/
#include <linux/blktrace_api.h>
#include "zfcp_ext.h"
static void zfcp_fsf_request_timeout_handler(unsigned long data)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
NULL);
}
static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
unsigned long timeout)
{
fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
fsf_req->timer.data = (unsigned long) fsf_req->adapter;
fsf_req->timer.expires = jiffies + timeout;
add_timer(&fsf_req->timer);
}
static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
{
BUG_ON(!fsf_req->erp_action);
fsf_req->timer.function = zfcp_erp_timeout_handler;
fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
fsf_req->timer.expires = jiffies + 30 * HZ;
add_timer(&fsf_req->timer);
}
/* association between FSF command and FSF QTCB type */
static u32 fsf_qtcb_type[] = {
[FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
[FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
[FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
[FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
[FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
};
static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
{
u16 subtable = table >> 16;
u16 rule = table & 0xffff;
const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
if (subtable && subtable < ARRAY_SIZE(act_type))
dev_warn(&adapter->ccw_device->dev,
"Access denied according to ACT rule type %s, "
"rule %d\n", act_type[subtable], rule);
}
static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
struct zfcp_port *port)
{
struct fsf_qtcb_header *header = &req->qtcb->header;
dev_warn(&req->adapter->ccw_device->dev,
"Access denied to port 0x%016Lx\n",
(unsigned long long)port->wwpn);
zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
zfcp_erp_port_access_denied(port, 55, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
struct zfcp_unit *unit)
{
struct fsf_qtcb_header *header = &req->qtcb->header;
dev_warn(&req->adapter->ccw_device->dev,
"Access denied to unit 0x%016Lx on port 0x%016Lx\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
zfcp_erp_unit_access_denied(unit, 59, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
{
dev_err(&req->adapter->ccw_device->dev, "FCP device not "
"operational because of an unsupported FC class\n");
zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
/**
* zfcp_fsf_req_free - free memory used by fsf request
* @fsf_req: pointer to struct zfcp_fsf_req
*/
void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
{
if (likely(req->pool)) {
mempool_free(req, req->pool);
return;
}
if (req->qtcb) {
kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
return;
}
}
/**
* zfcp_fsf_req_dismiss_all - dismiss all fsf requests
* @adapter: pointer to struct zfcp_adapter
*
* Never ever call this without shutting down the adapter first.
* Otherwise the adapter would continue using and corrupting s390 storage.
* Included BUG_ON() call to ensure this is done.
* ERP is supposed to be the only user of this function.
*/
void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
{
struct zfcp_fsf_req *req, *tmp;
unsigned long flags;
LIST_HEAD(remove_queue);
unsigned int i;
BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
spin_lock_irqsave(&adapter->req_list_lock, flags);
for (i = 0; i < REQUEST_LIST_SIZE; i++)
list_splice_init(&adapter->req_list[i], &remove_queue);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
list_for_each_entry_safe(req, tmp, &remove_queue, list) {
list_del(&req->list);
req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
zfcp_fsf_req_complete(req);
}
}
static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
{
struct fsf_status_read_buffer *sr_buf = req->data;
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_port *port;
int d_id = sr_buf->d_id & ZFCP_DID_MASK;
unsigned long flags;
read_lock_irqsave(&zfcp_data.config_lock, flags);
list_for_each_entry(port, &adapter->port_list_head, list)
if (port->d_id == d_id) {
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
switch (sr_buf->status_subtype) {
case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
zfcp_erp_port_reopen(port, 0, 101, req);
break;
case FSF_STATUS_READ_SUB_ERROR_PORT:
zfcp_erp_port_shutdown(port, 0, 122, req);
break;
}
return;
}
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
}
static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
struct fsf_link_down_info *link_down)
{
struct zfcp_adapter *adapter = req->adapter;
if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
return;
atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
if (!link_down)
goto out;
switch (link_down->error_code) {
case FSF_PSQ_LINK_NO_LIGHT:
dev_warn(&req->adapter->ccw_device->dev,
"There is no light signal from the local "
"fibre channel cable\n");
break;
case FSF_PSQ_LINK_WRAP_PLUG:
dev_warn(&req->adapter->ccw_device->dev,
"There is a wrap plug instead of a fibre "
"channel cable\n");
break;
case FSF_PSQ_LINK_NO_FCP:
dev_warn(&req->adapter->ccw_device->dev,
"The adjacent fibre channel node does not "
"support FCP\n");
break;
case FSF_PSQ_LINK_FIRMWARE_UPDATE:
dev_warn(&req->adapter->ccw_device->dev,
"The FCP device is suspended because of a "
"firmware update\n");
break;
case FSF_PSQ_LINK_INVALID_WWPN:
dev_warn(&req->adapter->ccw_device->dev,
"The FCP device detected a WWPN that is "
"duplicate or not valid\n");
break;
case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
dev_warn(&req->adapter->ccw_device->dev,
"The fibre channel fabric does not support NPIV\n");
break;
case FSF_PSQ_LINK_NO_FCP_RESOURCES:
dev_warn(&req->adapter->ccw_device->dev,
"The FCP adapter cannot support more NPIV ports\n");
break;
case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
dev_warn(&req->adapter->ccw_device->dev,
"The adjacent switch cannot support "
"more NPIV ports\n");
break;
case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
dev_warn(&req->adapter->ccw_device->dev,
"The FCP adapter could not log in to the "
"fibre channel fabric\n");
break;
case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
dev_warn(&req->adapter->ccw_device->dev,
"The WWPN assignment file on the FCP adapter "
"has been damaged\n");
break;
case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
dev_warn(&req->adapter->ccw_device->dev,
"The mode table on the FCP adapter "
"has been damaged\n");
break;
case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
dev_warn(&req->adapter->ccw_device->dev,
"All NPIV ports on the FCP adapter have "
"been assigned\n");
break;
default:
dev_warn(&req->adapter->ccw_device->dev,
"The link between the FCP adapter and "
"the FC fabric is down\n");
}
out:
zfcp_erp_adapter_failed(adapter, id, req);
}
static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
{
struct fsf_status_read_buffer *sr_buf = req->data;
struct fsf_link_down_info *ldi =
(struct fsf_link_down_info *) &sr_buf->payload;
switch (sr_buf->status_subtype) {
case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
zfcp_fsf_link_down_info_eval(req, 38, ldi);
break;
case FSF_STATUS_READ_SUB_FDISC_FAILED:
zfcp_fsf_link_down_info_eval(req, 39, ldi);
break;
case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
zfcp_fsf_link_down_info_eval(req, 40, NULL);
};
}
static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct fsf_status_read_buffer *sr_buf = req->data;
if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
mempool_free(sr_buf, adapter->pool.data_status_read);
zfcp_fsf_req_free(req);
return;
}
zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
switch (sr_buf->status_type) {
case FSF_STATUS_READ_PORT_CLOSED:
zfcp_fsf_status_read_port_closed(req);
break;
case FSF_STATUS_READ_INCOMING_ELS:
zfcp_fc_incoming_els(req);
break;
case FSF_STATUS_READ_SENSE_DATA_AVAIL:
break;
case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
dev_warn(&adapter->ccw_device->dev,
"The error threshold for checksum statistics "
"has been exceeded\n");
zfcp_hba_dbf_event_berr(adapter, req);
break;
case FSF_STATUS_READ_LINK_DOWN:
zfcp_fsf_status_read_link_down(req);
break;
case FSF_STATUS_READ_LINK_UP:
dev_info(&adapter->ccw_device->dev,
"The local link has been restored\n");
/* All ports should be marked as ready to run again */
zfcp_erp_modify_adapter_status(adapter, 30, NULL,
ZFCP_STATUS_COMMON_RUNNING,
ZFCP_SET);
zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
ZFCP_STATUS_COMMON_ERP_FAILED,
102, req);
break;
case FSF_STATUS_READ_NOTIFICATION_LOST:
if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
zfcp_erp_adapter_access_changed(adapter, 135, req);
if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
schedule_work(&adapter->scan_work);
break;
case FSF_STATUS_READ_CFDC_UPDATED:
zfcp_erp_adapter_access_changed(adapter, 136, req);
break;
case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
adapter->adapter_features = sr_buf->payload.word[0];
break;
}
mempool_free(sr_buf, adapter->pool.data_status_read);
zfcp_fsf_req_free(req);
atomic_inc(&adapter->stat_miss);
queue_work(zfcp_data.work_queue, &adapter->stat_work);
}
static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
{
switch (req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_FCP_RSP_AVAILABLE:
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
case FSF_SQ_NO_RETRY_POSSIBLE:
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
return;
case FSF_SQ_COMMAND_ABORTED:
req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
break;
case FSF_SQ_NO_RECOM:
dev_err(&req->adapter->ccw_device->dev,
"The FCP adapter reported a problem "
"that cannot be recovered\n");
zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
break;
}
/* all non-return stats set FSFREQ_ERROR*/
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
{
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
return;
switch (req->qtcb->header.fsf_status) {
case FSF_UNKNOWN_COMMAND:
dev_err(&req->adapter->ccw_device->dev,
"The FCP adapter does not recognize the command 0x%x\n",
req->qtcb->header.fsf_command);
zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
zfcp_fsf_fsfstatus_qual_eval(req);
break;
}
}
static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct fsf_qtcb *qtcb = req->qtcb;
union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
zfcp_hba_dbf_event_fsf_response(req);
if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
return;
}
switch (qtcb->prefix.prot_status) {
case FSF_PROT_GOOD:
case FSF_PROT_FSF_STATUS_PRESENTED:
return;
case FSF_PROT_QTCB_VERSION_ERROR:
dev_err(&adapter->ccw_device->dev,
"QTCB version 0x%x not supported by FCP adapter "
"(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
psq->word[0], psq->word[1]);
zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
break;
case FSF_PROT_ERROR_STATE:
case FSF_PROT_SEQ_NUMB_ERROR:
zfcp_erp_adapter_reopen(adapter, 0, 98, req);
req->status |= ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_PROT_UNSUPP_QTCB_TYPE:
dev_err(&adapter->ccw_device->dev,
"The QTCB type is not supported by the FCP adapter\n");
zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
break;
case FSF_PROT_HOST_CONNECTION_INITIALIZING:
atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
&adapter->status);
break;
case FSF_PROT_DUPLICATE_REQUEST_ID:
dev_err(&adapter->ccw_device->dev,
"0x%Lx is an ambiguous request identifier\n",
(unsigned long long)qtcb->bottom.support.req_handle);
zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
break;
case FSF_PROT_LINK_DOWN:
zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
/* FIXME: reopening adapter now? better wait for link up */
zfcp_erp_adapter_reopen(adapter, 0, 79, req);
break;
case FSF_PROT_REEST_QUEUE:
/* All ports should be marked as ready to run again */
zfcp_erp_modify_adapter_status(adapter, 28, NULL,
ZFCP_STATUS_COMMON_RUNNING,
ZFCP_SET);
zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
break;
default:
dev_err(&adapter->ccw_device->dev,
"0x%x is not a valid transfer protocol status\n",
qtcb->prefix.prot_status);
zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
}
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
/**
* zfcp_fsf_req_complete - process completion of a FSF request
* @fsf_req: The FSF request that has been completed.
*
* When a request has been completed either from the FCP adapter,
* or it has been dismissed due to a queue shutdown, this function
* is called to process the completion status and trigger further
* events related to the FSF request.
*/
void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
{
if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
zfcp_fsf_status_read_handler(req);
return;
}
del_timer(&req->timer);
zfcp_fsf_protstatus_eval(req);
zfcp_fsf_fsfstatus_eval(req);
req->handler(req);
if (req->erp_action)
zfcp_erp_notify(req->erp_action, 0);
req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
zfcp_fsf_req_free(req);
else
/* notify initiator waiting for the requests completion */
/*
* FIXME: Race! We must not access fsf_req here as it might have been
* cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
* flag. It's an improbable case. But, we have the same paranoia for
* the cleanup flag already.
* Might better be handled using complete()?
* (setting the flag and doing wakeup ought to be atomic
* with regard to checking the flag as long as waitqueue is
* part of the to be released structure)
*/
wake_up(&req->completion_wq);
}
static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
{
struct fsf_qtcb_bottom_config *bottom;
struct zfcp_adapter *adapter = req->adapter;
struct Scsi_Host *shost = adapter->scsi_host;
bottom = &req->qtcb->bottom.config;
if (req->data)
memcpy(req->data, bottom, sizeof(*bottom));
fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
fc_host_speed(shost) = bottom->fc_link_speed;
fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
adapter->hydra_version = bottom->adapter_type;
adapter->timer_ticks = bottom->timer_interval;
if (fc_host_permanent_port_name(shost) == -1)
fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
switch (bottom->fc_topology) {
case FSF_TOPO_P2P:
adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
adapter->peer_wwpn = bottom->plogi_payload.wwpn;
adapter->peer_wwnn = bottom->plogi_payload.wwnn;
fc_host_port_type(shost) = FC_PORTTYPE_PTP;
break;
case FSF_TOPO_FABRIC:
fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
break;
case FSF_TOPO_AL:
fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
default:
dev_err(&adapter->ccw_device->dev,
"Unknown or unsupported arbitrated loop "
"fibre channel topology detected\n");
zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
return -EIO;
}
return 0;
}
static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct fsf_qtcb *qtcb = req->qtcb;
struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
struct Scsi_Host *shost = adapter->scsi_host;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
adapter->fsf_lic_version = bottom->lic_version;
adapter->adapter_features = bottom->adapter_features;
adapter->connection_features = bottom->connection_features;
adapter->peer_wwpn = 0;
adapter->peer_wwnn = 0;
adapter->peer_d_id = 0;
switch (qtcb->header.fsf_status) {
case FSF_GOOD:
if (zfcp_fsf_exchange_config_evaluate(req))
return;
if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
dev_err(&adapter->ccw_device->dev,
"FCP adapter maximum QTCB size (%d bytes) "
"is too small\n",
bottom->max_qtcb_size);
zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
return;
}
atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
&adapter->status);
break;
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
fc_host_node_name(shost) = 0;
fc_host_port_name(shost) = 0;
fc_host_port_id(shost) = 0;
fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
adapter->hydra_version = 0;
atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
&adapter->status);
zfcp_fsf_link_down_info_eval(req, 42,
&qtcb->header.fsf_status_qual.link_down_info);
break;
default:
zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
return;
}
if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
adapter->hardware_version = bottom->hardware_version;
memcpy(fc_host_serial_number(shost), bottom->serial_number,
min(FC_SERIAL_NUMBER_SIZE, 17));
EBCASC(fc_host_serial_number(shost),
min(FC_SERIAL_NUMBER_SIZE, 17));
}
if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
dev_err(&adapter->ccw_device->dev,
"The FCP adapter only supports newer "
"control block versions\n");
zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
return;
}
if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
dev_err(&adapter->ccw_device->dev,
"The FCP adapter only supports older "
"control block versions\n");
zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
}
}
static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
struct Scsi_Host *shost = adapter->scsi_host;
if (req->data)
memcpy(req->data, bottom, sizeof(*bottom));
if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
fc_host_permanent_port_name(shost) = bottom->wwpn;
else
fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
fc_host_supported_speeds(shost) = bottom->supported_speed;
}
static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
{
struct fsf_qtcb *qtcb = req->qtcb;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (qtcb->header.fsf_status) {
case FSF_GOOD:
zfcp_fsf_exchange_port_evaluate(req);
break;
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
zfcp_fsf_exchange_port_evaluate(req);
zfcp_fsf_link_down_info_eval(req, 43,
&qtcb->header.fsf_status_qual.link_down_info);
break;
}
}
static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
{
struct zfcp_qdio_queue *req_q = &adapter->req_q;
spin_lock_bh(&adapter->req_q_lock);
if (atomic_read(&req_q->count))
return 1;
spin_unlock_bh(&adapter->req_q_lock);
return 0;
}
static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
{
unsigned int count = atomic_read(&adapter->req_q.count);
if (!count)
atomic_inc(&adapter->qdio_outb_full);
return count > 0;
}
static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
{
long ret;
spin_unlock_bh(&adapter->req_q_lock);
ret = wait_event_interruptible_timeout(adapter->request_wq,
zfcp_fsf_sbal_check(adapter), 5 * HZ);
if (ret > 0)
return 0;
if (!ret)
atomic_inc(&adapter->qdio_outb_full);
spin_lock_bh(&adapter->req_q_lock);
return -EIO;
}
static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
{
struct zfcp_fsf_req *req;
req = mempool_alloc(pool, GFP_ATOMIC);
if (!req)
return NULL;
memset(req, 0, sizeof(*req));
req->pool = pool;
return req;
}
static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
{
struct zfcp_fsf_req_qtcb *qtcb;
if (likely(pool))
qtcb = mempool_alloc(pool, GFP_ATOMIC);
else
qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
GFP_ATOMIC);
if (unlikely(!qtcb))
return NULL;
memset(qtcb, 0, sizeof(*qtcb));
qtcb->fsf_req.qtcb = &qtcb->qtcb;
qtcb->fsf_req.pool = pool;
return &qtcb->fsf_req;
}
static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
u32 fsf_cmd, int req_flags,
mempool_t *pool)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req;
struct zfcp_qdio_queue *req_q = &adapter->req_q;
if (req_flags & ZFCP_REQ_NO_QTCB)
req = zfcp_fsf_alloc_noqtcb(pool);
else
req = zfcp_fsf_alloc_qtcb(pool);
if (unlikely(!req))
return ERR_PTR(-EIO);
if (adapter->req_no == 0)
adapter->req_no++;
INIT_LIST_HEAD(&req->list);
init_timer(&req->timer);
init_waitqueue_head(&req->completion_wq);
req->adapter = adapter;
req->fsf_command = fsf_cmd;
req->req_id = adapter->req_no++;
req->sbal_number = 1;
req->sbal_first = req_q->first;
req->sbal_last = req_q->first;
req->sbale_curr = 1;
sbale = zfcp_qdio_sbale_req(req);
sbale[0].addr = (void *) req->req_id;
sbale[0].flags |= SBAL_FLAGS0_COMMAND;
if (likely(req->qtcb)) {
req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
req->qtcb->prefix.req_id = req->req_id;
req->qtcb->prefix.ulp_info = 26;
req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
req->qtcb->header.req_handle = req->req_id;
req->qtcb->header.fsf_command = req->fsf_command;
req->seq_no = adapter->fsf_req_seq_no;
req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
sbale[1].addr = (void *) req->qtcb;
sbale[1].length = sizeof(struct fsf_qtcb);
}
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
zfcp_fsf_req_free(req);
return ERR_PTR(-EIO);
}
if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
return req;
}
static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
unsigned long flags;
int idx;
/* put allocated FSF request into hash table */
spin_lock_irqsave(&adapter->req_list_lock, flags);
idx = zfcp_reqlist_hash(req->req_id);
list_add_tail(&req->list, &adapter->req_list[idx]);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
req->issued = get_clock();
if (zfcp_qdio_send(req)) {
del_timer(&req->timer);
spin_lock_irqsave(&adapter->req_list_lock, flags);
/* lookup request again, list might have changed */
if (zfcp_reqlist_find_safe(adapter, req))
zfcp_reqlist_remove(adapter, req);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
zfcp_erp_adapter_reopen(adapter, 0, 116, req);
return -EIO;
}
/* Don't increase for unsolicited status */
if (req->qtcb)
adapter->fsf_req_seq_no++;
return 0;
}
/**
* zfcp_fsf_status_read - send status read request
* @adapter: pointer to struct zfcp_adapter
* @req_flags: request flags
* Returns: 0 on success, ERROR otherwise
*/
int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
{
struct zfcp_fsf_req *req;
struct fsf_status_read_buffer *sr_buf;
struct qdio_buffer_element *sbale;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
ZFCP_REQ_NO_QTCB,
adapter->pool.fsf_req_status_read);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
req->sbale_curr = 2;
sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
if (!sr_buf) {
retval = -ENOMEM;
goto failed_buf;
}
memset(sr_buf, 0, sizeof(*sr_buf));
req->data = sr_buf;
sbale = zfcp_qdio_sbale_curr(req);
sbale->addr = (void *) sr_buf;
sbale->length = sizeof(*sr_buf);
retval = zfcp_fsf_req_send(req);
if (retval)
goto failed_req_send;
goto out;
failed_req_send:
mempool_free(sr_buf, adapter->pool.data_status_read);
failed_buf:
zfcp_fsf_req_free(req);
zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
{
struct zfcp_unit *unit = req->data;
union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
if (fsq->word[0] == fsq->word[1]) {
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
case FSF_LUN_HANDLE_NOT_VALID:
if (fsq->word[0] == fsq->word[1]) {
zfcp_erp_port_reopen(unit->port, 0, 105, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
case FSF_FCP_COMMAND_DOES_NOT_EXIST:
req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
break;
case FSF_PORT_BOXED:
zfcp_erp_port_boxed(unit->port, 47, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_BOXED:
zfcp_erp_unit_boxed(unit, 48, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (fsq->word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
zfcp_test_link(unit->port);
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_GOOD:
req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
break;
}
}
/**
* zfcp_fsf_abort_fcp_command - abort running SCSI command
* @old_req_id: unsigned long
* @adapter: pointer to struct zfcp_adapter
* @unit: pointer to struct zfcp_unit
* @req_flags: integer specifying the request flags
* Returns: pointer to struct zfcp_fsf_req
*
* FIXME(design): should be watched by a timeout !!!
*/
struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
struct zfcp_adapter *adapter,
struct zfcp_unit *unit,
int req_flags)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
spin_lock(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
req_flags, adapter->pool.fsf_req_abort);
if (IS_ERR(req))
goto out;
if (unlikely(!(atomic_read(&unit->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
goto out_error_free;
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->data = unit;
req->handler = zfcp_fsf_abort_fcp_command_handler;
req->qtcb->header.lun_handle = unit->handle;
req->qtcb->header.port_handle = unit->port->handle;
req->qtcb->bottom.support.req_handle = (u64) old_req_id;
zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
if (!zfcp_fsf_req_send(req))
goto out;
out_error_free:
zfcp_fsf_req_free(req);
req = NULL;
out:
spin_unlock(&adapter->req_q_lock);
return req;
}
static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_send_ct *send_ct = req->data;
struct fsf_qtcb_header *header = &req->qtcb->header;
send_ct->status = -EINVAL;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
switch (header->fsf_status) {
case FSF_GOOD:
zfcp_san_dbf_event_ct_response(req);
send_ct->status = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
zfcp_fsf_class_not_supp(req);
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_ACCESS_DENIED:
break;
case FSF_PORT_BOXED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_PORT_HANDLE_NOT_VALID:
zfcp_erp_adapter_reopen(adapter, 0, 106, req);
case FSF_GENERIC_COMMAND_REJECTED:
case FSF_PAYLOAD_SIZE_MISMATCH:
case FSF_REQUEST_SIZE_TOO_LARGE:
case FSF_RESPONSE_SIZE_TOO_LARGE:
case FSF_SBAL_MISMATCH:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
skip_fsfstatus:
if (send_ct->handler)
send_ct->handler(send_ct->handler_data);
}
static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
struct scatterlist *sg_req,
struct scatterlist *sg_resp, int max_sbals)
{
int bytes;
bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
sg_req, max_sbals);
if (bytes <= 0)
return -ENOMEM;
req->qtcb->bottom.support.req_buf_length = bytes;
req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
sg_resp, max_sbals);
if (bytes <= 0)
return -ENOMEM;
req->qtcb->bottom.support.resp_buf_length = bytes;
return 0;
}
/**
* zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
* @ct: pointer to struct zfcp_send_ct with data for request
* @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
* @erp_action: if non-null the Generic Service request sent within ERP
*/
int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
struct zfcp_erp_action *erp_action)
{
struct zfcp_wka_port *wka_port = ct->wka_port;
struct zfcp_adapter *adapter = wka_port->adapter;
struct zfcp_fsf_req *req;
int ret = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
ZFCP_REQ_AUTO_CLEANUP, pool);
if (IS_ERR(req)) {
ret = PTR_ERR(req);
goto out;
}
ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
FSF_MAX_SBALS_PER_REQ);
if (ret)
goto failed_send;
req->handler = zfcp_fsf_send_ct_handler;
req->qtcb->header.port_handle = wka_port->handle;
req->qtcb->bottom.support.service_class = FSF_CLASS_3;
req->qtcb->bottom.support.timeout = ct->timeout;
req->data = ct;
zfcp_san_dbf_event_ct_request(req);
if (erp_action) {
erp_action->fsf_req = req;
req->erp_action = erp_action;
zfcp_fsf_start_erp_timer(req);
} else
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
ret = zfcp_fsf_req_send(req);
if (ret)
goto failed_send;
goto out;
failed_send:
zfcp_fsf_req_free(req);
if (erp_action)
erp_action->fsf_req = NULL;
out:
spin_unlock_bh(&adapter->req_q_lock);
return ret;
}
static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
{
struct zfcp_send_els *send_els = req->data;
struct zfcp_port *port = send_els->port;
struct fsf_qtcb_header *header = &req->qtcb->header;
send_els->status = -EINVAL;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
switch (header->fsf_status) {
case FSF_GOOD:
zfcp_san_dbf_event_els_response(req);
send_els->status = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
zfcp_fsf_class_not_supp(req);
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
if (port && (send_els->ls_code != ZFCP_LS_ADISC))
zfcp_test_link(port);
/*fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
case FSF_SQ_RETRY_IF_POSSIBLE:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_ELS_COMMAND_REJECTED:
case FSF_PAYLOAD_SIZE_MISMATCH:
case FSF_REQUEST_SIZE_TOO_LARGE:
case FSF_RESPONSE_SIZE_TOO_LARGE:
break;
case FSF_ACCESS_DENIED:
zfcp_fsf_access_denied_port(req, port);
break;
case FSF_SBAL_MISMATCH:
/* should never occure, avoided in zfcp_fsf_send_els */
/* fall through */
default:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
skip_fsfstatus:
if (send_els->handler)
send_els->handler(send_els->handler_data);
}
/**
* zfcp_fsf_send_els - initiate an ELS command (FC-FS)
* @els: pointer to struct zfcp_send_els with data for the command
*/
int zfcp_fsf_send_els(struct zfcp_send_els *els)
{
struct zfcp_fsf_req *req;
struct zfcp_adapter *adapter = els->adapter;
struct fsf_qtcb_bottom_support *bottom;
int ret = -EIO;
if (unlikely(!(atomic_read(&els->port->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
return -EBUSY;
spin_lock(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
ZFCP_REQ_AUTO_CLEANUP, NULL);
if (IS_ERR(req)) {
ret = PTR_ERR(req);
goto out;
}
ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
if (ret)
goto failed_send;
bottom = &req->qtcb->bottom.support;
req->handler = zfcp_fsf_send_els_handler;
bottom->d_id = els->d_id;
bottom->service_class = FSF_CLASS_3;
bottom->timeout = 2 * R_A_TOV;
req->data = els;
zfcp_san_dbf_event_els_request(req);
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
ret = zfcp_fsf_req_send(req);
if (ret)
goto failed_send;
goto out;
failed_send:
zfcp_fsf_req_free(req);
out:
spin_unlock(&adapter->req_q_lock);
return ret;
}
int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req;
struct zfcp_adapter *adapter = erp_action->adapter;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter,
FSF_QTCB_EXCHANGE_CONFIG_DATA,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->qtcb->bottom.config.feature_selection =
FSF_FEATURE_CFDC |
FSF_FEATURE_LUN_SHARING |
FSF_FEATURE_NOTIFICATION_LOST |
FSF_FEATURE_UPDATE_ALERT;
req->erp_action = erp_action;
req->handler = zfcp_fsf_exchange_config_data_handler;
erp_action->fsf_req = req;
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
struct fsf_qtcb_bottom_config *data)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
0, NULL);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_exchange_config_data_handler;
req->qtcb->bottom.config.feature_selection =
FSF_FEATURE_CFDC |
FSF_FEATURE_LUN_SHARING |
FSF_FEATURE_NOTIFICATION_LOST |
FSF_FEATURE_UPDATE_ALERT;
if (data)
req->data = data;
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
out:
spin_unlock_bh(&adapter->req_q_lock);
if (!retval)
wait_event(req->completion_wq,
req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
zfcp_fsf_req_free(req);
return retval;
}
/**
* zfcp_fsf_exchange_port_data - request information about local port
* @erp_action: ERP action for the adapter for which port data is requested
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req;
struct zfcp_adapter *adapter = erp_action->adapter;
int retval = -EIO;
if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
return -EOPNOTSUPP;
spin_lock_bh(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_exchange_port_data_handler;
req->erp_action = erp_action;
erp_action->fsf_req = req;
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
/**
* zfcp_fsf_exchange_port_data_sync - request information about local port
* @adapter: pointer to struct zfcp_adapter
* @data: pointer to struct fsf_qtcb_bottom_port
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
struct fsf_qtcb_bottom_port *data)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
int retval = -EIO;
if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
return -EOPNOTSUPP;
spin_lock_bh(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
NULL);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
if (data)
req->data = data;
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_exchange_port_data_handler;
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
out:
spin_unlock_bh(&adapter->req_q_lock);
if (!retval)
wait_event(req->completion_wq,
req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
zfcp_fsf_req_free(req);
return retval;
}
static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
{
struct zfcp_port *port = req->data;
struct fsf_qtcb_header *header = &req->qtcb->header;
struct fsf_plogi *plogi;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (header->fsf_status) {
case FSF_PORT_ALREADY_OPEN:
break;
case FSF_ACCESS_DENIED:
zfcp_fsf_access_denied_port(req, port);
break;
case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
dev_warn(&req->adapter->ccw_device->dev,
"Not enough FCP adapter resources to open "
"remote port 0x%016Lx\n",
(unsigned long long)port->wwpn);
zfcp_erp_port_failed(port, 31, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_NO_RETRY_POSSIBLE:
dev_warn(&req->adapter->ccw_device->dev,
"Remote port 0x%016Lx could not be opened\n",
(unsigned long long)port->wwpn);
zfcp_erp_port_failed(port, 32, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_GOOD:
port->handle = header->port_handle;
atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_COMMON_ACCESS_BOXED,
&port->status);
/* check whether D_ID has changed during open */
/*
* FIXME: This check is not airtight, as the FCP channel does
* not monitor closures of target port connections caused on
* the remote side. Thus, they might miss out on invalidating
* locally cached WWPNs (and other N_Port parameters) of gone
* target ports. So, our heroic attempt to make things safe
* could be undermined by 'open port' response data tagged with
* obsolete WWPNs. Another reason to monitor potential
* connection closures ourself at least (by interpreting
* incoming ELS' and unsolicited status). It just crosses my
* mind that one should be able to cross-check by means of
* another GID_PN straight after a port has been opened.
* Alternately, an ADISC/PDISC ELS should suffice, as well.
*/
plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
if (plogi->serv_param.wwpn != port->wwpn)
atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
&port->status);
else {
port->wwnn = plogi->serv_param.wwnn;
zfcp_fc_plogi_evaluate(port, plogi);
}
}
break;
case FSF_UNKNOWN_OP_SUBTYPE:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
}
/**
* zfcp_fsf_open_port - create and send open port request
* @erp_action: pointer to struct zfcp_erp_action
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter,
FSF_QTCB_OPEN_PORT_WITH_DID,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_open_port_handler;
req->qtcb->bottom.support.d_id = erp_action->port->d_id;
req->data = erp_action->port;
req->erp_action = erp_action;
erp_action->fsf_req = req;
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
{
struct zfcp_port *port = req->data;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
break;
case FSF_GOOD:
zfcp_erp_modify_port_status(port, 33, req,
ZFCP_STATUS_COMMON_OPEN,
ZFCP_CLEAR);
break;
}
}
/**
* zfcp_fsf_close_port - create and send close port request
* @erp_action: pointer to struct zfcp_erp_action
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_close_port_handler;
req->data = erp_action->port;
req->erp_action = erp_action;
req->qtcb->header.port_handle = erp_action->port->handle;
erp_action->fsf_req = req;
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
{
struct zfcp_wka_port *wka_port = req->data;
struct fsf_qtcb_header *header = &req->qtcb->header;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
goto out;
}
switch (header->fsf_status) {
case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
dev_warn(&req->adapter->ccw_device->dev,
"Opening WKA port 0x%x failed\n", wka_port->d_id);
case FSF_ADAPTER_STATUS_AVAILABLE:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
case FSF_ACCESS_DENIED:
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
break;
case FSF_PORT_ALREADY_OPEN:
case FSF_GOOD:
wka_port->handle = header->port_handle;
wka_port->status = ZFCP_WKA_PORT_ONLINE;
}
out:
wake_up(&wka_port->completion_wq);
}
/**
* zfcp_fsf_open_wka_port - create and send open wka-port request
* @wka_port: pointer to struct zfcp_wka_port
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = wka_port->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter,
FSF_QTCB_OPEN_PORT_WITH_DID,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (unlikely(IS_ERR(req))) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_open_wka_port_handler;
req->qtcb->bottom.support.d_id = wka_port->d_id;
req->data = wka_port;
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
if (retval)
zfcp_fsf_req_free(req);
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
{
struct zfcp_wka_port *wka_port = req->data;
if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
}
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
wake_up(&wka_port->completion_wq);
}
/**
* zfcp_fsf_close_wka_port - create and send close wka port request
* @erp_action: pointer to struct zfcp_erp_action
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = wka_port->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (unlikely(IS_ERR(req))) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->handler = zfcp_fsf_close_wka_port_handler;
req->data = wka_port;
req->qtcb->header.port_handle = wka_port->handle;
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
if (retval)
zfcp_fsf_req_free(req);
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
{
struct zfcp_port *port = req->data;
struct fsf_qtcb_header *header = &req->qtcb->header;
struct zfcp_unit *unit;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
switch (header->fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
zfcp_fsf_access_denied_port(req, port);
break;
case FSF_PORT_BOXED:
zfcp_erp_port_boxed(port, 50, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
/* can't use generic zfcp_erp_modify_port_status because
* ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
list_for_each_entry(unit, &port->unit_list_head, list)
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
&unit->status);
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
/* fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_GOOD:
/* can't use generic zfcp_erp_modify_port_status because
* ZFCP_STATUS_COMMON_OPEN must not be reset for the port
*/
atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
list_for_each_entry(unit, &port->unit_list_head, list)
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
&unit->status);
break;
}
skip_fsfstatus:
atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
}
/**
* zfcp_fsf_close_physical_port - close physical port
* @erp_action: pointer to struct zfcp_erp_action
* Returns: 0 on success
*/
int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->data = erp_action->port;
req->qtcb->header.port_handle = erp_action->port->handle;
req->erp_action = erp_action;
req->handler = zfcp_fsf_close_physical_port_handler;
erp_action->fsf_req = req;
atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
&erp_action->port->status);
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_unit *unit = req->data;
struct fsf_qtcb_header *header = &req->qtcb->header;
struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
struct fsf_queue_designator *queue_designator =
&header->fsf_status_qual.fsf_queue_designator;
int exclusive, readwrite;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_COMMON_ACCESS_BOXED |
ZFCP_STATUS_UNIT_SHARED |
ZFCP_STATUS_UNIT_READONLY,
&unit->status);
switch (header->fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
/* fall through */
case FSF_LUN_ALREADY_OPEN:
break;
case FSF_ACCESS_DENIED:
zfcp_fsf_access_denied_unit(req, unit);
atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
break;
case FSF_PORT_BOXED:
zfcp_erp_port_boxed(unit->port, 51, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_SHARING_VIOLATION:
if (header->fsf_status_qual.word[0])
dev_warn(&adapter->ccw_device->dev,
"LUN 0x%Lx on port 0x%Lx is already in "
"use by CSS%d, MIF Image ID %x\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn,
queue_designator->cssid,
queue_designator->hla);
else
zfcp_act_eval_err(adapter,
header->fsf_status_qual.word[2]);
zfcp_erp_unit_access_denied(unit, 60, req);
atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
dev_warn(&adapter->ccw_device->dev,
"No handle is available for LUN "
"0x%016Lx on port 0x%016Lx\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_unit_failed(unit, 34, req);
/* fall through */
case FSF_INVALID_COMMAND_OPTION:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
zfcp_test_link(unit->port);
/* fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_GOOD:
unit->handle = header->lun_handle;
atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
(adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
(adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
exclusive = (bottom->lun_access_info &
FSF_UNIT_ACCESS_EXCLUSIVE);
readwrite = (bottom->lun_access_info &
FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
if (!exclusive)
atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
&unit->status);
if (!readwrite) {
atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
&unit->status);
dev_info(&adapter->ccw_device->dev,
"SCSI device at LUN 0x%016Lx on port "
"0x%016Lx opened read-only\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
}
if (exclusive && !readwrite) {
dev_err(&adapter->ccw_device->dev,
"Exclusive read-only access not "
"supported (unit 0x%016Lx, "
"port 0x%016Lx)\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_unit_failed(unit, 35, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_unit_shutdown(unit, 0, 80, req);
} else if (!exclusive && readwrite) {
dev_err(&adapter->ccw_device->dev,
"Shared read-write access not "
"supported (unit 0x%016Lx, port "
"0x%016Lx\n)",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_unit_failed(unit, 36, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_unit_shutdown(unit, 0, 81, req);
}
}
break;
}
}
/**
* zfcp_fsf_open_unit - open unit
* @erp_action: pointer to struct zfcp_erp_action
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->qtcb->header.port_handle = erp_action->port->handle;
req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
req->handler = zfcp_fsf_open_unit_handler;
req->data = erp_action->unit;
req->erp_action = erp_action;
erp_action->fsf_req = req;
if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
{
struct zfcp_unit *unit = req->data;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_HANDLE_NOT_VALID:
zfcp_erp_port_reopen(unit->port, 0, 111, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
zfcp_erp_port_boxed(unit->port, 52, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
zfcp_test_link(unit->port);
/* fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
case FSF_GOOD:
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
break;
}
}
/**
* zfcp_fsf_close_unit - close zfcp unit
* @erp_action: pointer to struct zfcp_unit
* Returns: 0 on success, error otherwise
*/
int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
{
struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_fsf_req *req;
int retval = -EIO;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
req->qtcb->header.port_handle = erp_action->port->handle;
req->qtcb->header.lun_handle = erp_action->unit->handle;
req->handler = zfcp_fsf_close_unit_handler;
req->data = erp_action->unit;
req->erp_action = erp_action;
erp_action->fsf_req = req;
zfcp_fsf_start_erp_timer(req);
retval = zfcp_fsf_req_send(req);
if (retval) {
zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
out:
spin_unlock_bh(&adapter->req_q_lock);
return retval;
}
static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
{
lat_rec->sum += lat;
lat_rec->min = min(lat_rec->min, lat);
lat_rec->max = max(lat_rec->max, lat);
}
static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
{
struct fsf_qual_latency_info *lat_inf;
struct latency_cont *lat;
struct zfcp_unit *unit = req->unit;
unsigned long flags;
lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
switch (req->qtcb->bottom.io.data_direction) {
case FSF_DATADIR_READ:
lat = &unit->latencies.read;
break;
case FSF_DATADIR_WRITE:
lat = &unit->latencies.write;
break;
case FSF_DATADIR_CMND:
lat = &unit->latencies.cmd;
break;
default:
return;
}
spin_lock_irqsave(&unit->latencies.lock, flags);
zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
lat->counter++;
spin_unlock_irqrestore(&unit->latencies.lock, flags);
}
#ifdef CONFIG_BLK_DEV_IO_TRACE
static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
{
struct fsf_qual_latency_info *lat_inf;
struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
struct request *req = scsi_cmnd->request;
struct zfcp_blk_drv_data trace;
int ticks = fsf_req->adapter->timer_ticks;
trace.flags = 0;
trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
trace.flags |= ZFCP_BLK_LAT_VALID;
lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
trace.channel_lat = lat_inf->channel_lat * ticks;
trace.fabric_lat = lat_inf->fabric_lat * ticks;
}
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
trace.flags |= ZFCP_BLK_REQ_ERROR;
trace.inb_usage = fsf_req->qdio_inb_usage;
trace.outb_usage = fsf_req->qdio_outb_usage;
blk_add_driver_data(req->q, req, &trace, sizeof(trace));
}
#else
static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
{
}
#endif
static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
{
struct scsi_cmnd *scpnt = req->data;
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
&(req->qtcb->bottom.io.fcp_rsp);
u32 sns_len;
char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
unsigned long flags;
if (unlikely(!scpnt))
return;
read_lock_irqsave(&req->adapter->abort_lock, flags);
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
set_host_byte(scpnt, DID_SOFT_ERROR);
set_driver_byte(scpnt, SUGGEST_RETRY);
goto skip_fsfstatus;
}
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
set_host_byte(scpnt, DID_ERROR);
goto skip_fsfstatus;
}
set_msg_byte(scpnt, COMMAND_COMPLETE);
scpnt->result |= fcp_rsp_iu->scsi_status;
if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
zfcp_fsf_req_latency(req);
zfcp_fsf_trace_latency(req);
if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
if (fcp_rsp_info[3] == RSP_CODE_GOOD)
set_host_byte(scpnt, DID_OK);
else {
set_host_byte(scpnt, DID_ERROR);
goto skip_fsfstatus;
}
}
if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
fcp_rsp_iu->fcp_rsp_len;
sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
memcpy(scpnt->sense_buffer,
zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
}
if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
scpnt->underflow)
set_host_byte(scpnt, DID_ERROR);
}
skip_fsfstatus:
if (scpnt->result != 0)
zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
else if (scpnt->retries > 0)
zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
else
zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
scpnt->host_scribble = NULL;
(scpnt->scsi_done) (scpnt);
/*
* We must hold this lock until scsi_done has been called.
* Otherwise we may call scsi_done after abort regarding this
* command has completed.
* Note: scsi_done must not block!
*/
read_unlock_irqrestore(&req->adapter->abort_lock, flags);
}
static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
{
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
&(req->qtcb->bottom.io.fcp_rsp);
char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
(req->status & ZFCP_STATUS_FSFREQ_ERROR))
req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
}
static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
{
struct zfcp_unit *unit;
struct fsf_qtcb_header *header = &req->qtcb->header;
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
unit = req->data;
else
unit = req->unit;
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
goto skip_fsfstatus;
switch (header->fsf_status) {
case FSF_HANDLE_MISMATCH:
case FSF_PORT_HANDLE_NOT_VALID:
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_FCPLUN_NOT_VALID:
case FSF_LUN_HANDLE_NOT_VALID:
zfcp_erp_port_reopen(unit->port, 0, 113, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
zfcp_fsf_class_not_supp(req);
break;
case FSF_ACCESS_DENIED:
zfcp_fsf_access_denied_unit(req, unit);
break;
case FSF_DIRECTION_INDICATOR_NOT_VALID:
dev_err(&req->adapter->ccw_device->dev,
"Incorrect direction %d, unit 0x%016Lx on port "
"0x%016Lx closed\n",
req->qtcb->bottom.io.data_direction,
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_CMND_LENGTH_NOT_VALID:
dev_err(&req->adapter->ccw_device->dev,
"Incorrect CDB length %d, unit 0x%016Lx on "
"port 0x%016Lx closed\n",
req->qtcb->bottom.io.fcp_cmnd_length,
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
zfcp_erp_port_boxed(unit->port, 53, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_BOXED:
zfcp_erp_unit_boxed(unit, 54, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
if (header->fsf_status_qual.word[0] ==
FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
zfcp_test_link(unit->port);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
skip_fsfstatus:
if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
zfcp_fsf_send_fcp_ctm_handler(req);
else {
zfcp_fsf_send_fcp_command_task_handler(req);
req->unit = NULL;
zfcp_unit_put(unit);
}
}
static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
{
u32 *fcp_dl_ptr;
/*
* fcp_dl_addr = start address of fcp_cmnd structure +
* size of fixed part + size of dynamically sized add_dcp_cdb field
* SEE FCP-2 documentation
*/
fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
(fcp_cmd->add_fcp_cdb_length << 2));
*fcp_dl_ptr = fcp_dl;
}
/**
* zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
* @adapter: adapter where scsi command is issued
* @unit: unit where command is sent to
* @scsi_cmnd: scsi command to be sent
* @timer: timer to be started when request is initiated
* @req_flags: flags for fsf_request
*/
int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
struct zfcp_unit *unit,
struct scsi_cmnd *scsi_cmnd,
int use_timer, int req_flags)
{
struct zfcp_fsf_req *req;
struct fcp_cmnd_iu *fcp_cmnd_iu;
unsigned int sbtype;
int real_bytes, retval = -EIO;
if (unlikely(!(atomic_read(&unit->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
return -EBUSY;
spin_lock(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
adapter->pool.fsf_req_scsi);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
goto out;
}
zfcp_unit_get(unit);
req->unit = unit;
req->data = scsi_cmnd;
req->handler = zfcp_fsf_send_fcp_command_handler;
req->qtcb->header.lun_handle = unit->handle;
req->qtcb->header.port_handle = unit->port->handle;
req->qtcb->bottom.io.service_class = FSF_CLASS_3;
scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
/*
* set depending on data direction:
* data direction bits in SBALE (SB Type)
* data direction bits in QTCB
* data direction bits in FCP_CMND IU
*/
switch (scsi_cmnd->sc_data_direction) {
case DMA_NONE:
req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
sbtype = SBAL_FLAGS0_TYPE_READ;
break;
case DMA_FROM_DEVICE:
req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
sbtype = SBAL_FLAGS0_TYPE_READ;
fcp_cmnd_iu->rddata = 1;
break;
case DMA_TO_DEVICE:
req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
sbtype = SBAL_FLAGS0_TYPE_WRITE;
fcp_cmnd_iu->wddata = 1;
break;
case DMA_BIDIRECTIONAL:
default:
retval = -EIO;
goto failed_scsi_cmnd;
}
if (likely((scsi_cmnd->device->simple_tags) ||
((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
(atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
fcp_cmnd_iu->task_attribute = SIMPLE_Q;
else
fcp_cmnd_iu->task_attribute = UNTAGGED;
if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
fcp_cmnd_iu->add_fcp_cdb_length =
(scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
scsi_sglist(scsi_cmnd),
FSF_MAX_SBALS_PER_REQ);
if (unlikely(real_bytes < 0)) {
if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
retval = -EIO;
else {
dev_err(&adapter->ccw_device->dev,
"Oversize data package, unit 0x%016Lx "
"on port 0x%016Lx closed\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_unit_shutdown(unit, 0, 131, req);
retval = -EINVAL;
}
goto failed_scsi_cmnd;
}
zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
if (use_timer)
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
if (unlikely(retval))
goto failed_scsi_cmnd;
goto out;
failed_scsi_cmnd:
zfcp_unit_put(unit);
zfcp_fsf_req_free(req);
scsi_cmnd->host_scribble = NULL;
out:
spin_unlock(&adapter->req_q_lock);
return retval;
}
/**
* zfcp_fsf_send_fcp_ctm - send SCSI task management command
* @adapter: pointer to struct zfcp-adapter
* @unit: pointer to struct zfcp_unit
* @tm_flags: unsigned byte for task management flags
* @req_flags: int request flags
* Returns: on success pointer to struct fsf_req, NULL otherwise
*/
struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
struct zfcp_unit *unit,
u8 tm_flags, int req_flags)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
struct fcp_cmnd_iu *fcp_cmnd_iu;
if (unlikely(!(atomic_read(&unit->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
return NULL;
spin_lock(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
adapter->pool.fsf_req_scsi);
if (IS_ERR(req))
goto out;
req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
req->data = unit;
req->handler = zfcp_fsf_send_fcp_command_handler;
req->qtcb->header.lun_handle = unit->handle;
req->qtcb->header.port_handle = unit->port->handle;
req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
req->qtcb->bottom.io.service_class = FSF_CLASS_3;
req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
sizeof(u32);
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
fcp_cmnd_iu->task_management_flags = tm_flags;
zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
if (!zfcp_fsf_req_send(req))
goto out;
zfcp_fsf_req_free(req);
req = NULL;
out:
spin_unlock(&adapter->req_q_lock);
return req;
}
static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
{
if (req->qtcb->header.fsf_status != FSF_GOOD)
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
/**
* zfcp_fsf_control_file - control file upload/download
* @adapter: pointer to struct zfcp_adapter
* @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
* Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
*/
struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
struct zfcp_fsf_cfdc *fsf_cfdc)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
struct fsf_qtcb_bottom_support *bottom;
int direction, retval = -EIO, bytes;
if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
return ERR_PTR(-EOPNOTSUPP);
switch (fsf_cfdc->command) {
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
direction = SBAL_FLAGS0_TYPE_WRITE;
break;
case FSF_QTCB_UPLOAD_CONTROL_FILE:
direction = SBAL_FLAGS0_TYPE_READ;
break;
default:
return ERR_PTR(-EINVAL);
}
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
if (IS_ERR(req)) {
retval = -EPERM;
goto out;
}
req->handler = zfcp_fsf_control_file_handler;
sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= direction;
bottom = &req->qtcb->bottom.support;
bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
bottom->option = fsf_cfdc->option;
bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
FSF_MAX_SBALS_PER_REQ);
if (bytes != ZFCP_CFDC_MAX_SIZE) {
retval = -ENOMEM;
zfcp_fsf_req_free(req);
goto out;
}
zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(req);
out:
spin_unlock_bh(&adapter->req_q_lock);
if (!retval) {
wait_event(req->completion_wq,
req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
return req;
}
return ERR_PTR(retval);
}
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