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kernel-fxtec-pro1x/drivers/s390/scsi/zfcp_fsf.c
Christof Schmitt 24073b475d [SCSI] zfcp: Move FC code to new file 
Move all Fibre Channel related code to new file and cleanup the code
while doing so.

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>
2008-07-12 08:22:25 -05:00

4722 lines
145 KiB
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/*
* This file is part of the zfcp device driver for
* FCP adapters for IBM System z9 and zSeries.
*
* (C) Copyright IBM Corp. 2002, 2006
*
* 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "zfcp_ext.h"
static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_fcp_command_task_management_handler(
struct zfcp_fsf_req *);
static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
static inline int zfcp_fsf_req_sbal_check(
unsigned long *, struct zfcp_qdio_queue *, int);
static inline int zfcp_use_one_sbal(
struct scatterlist *, int, struct scatterlist *, int);
static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8,
struct fsf_link_down_info *);
static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
/* 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 const char zfcp_act_subtable_type[5][8] = {
"unknown", "OS", "WWPN", "DID", "LUN"
};
/****************************************************************/
/*************** FSF related Functions *************************/
/****************************************************************/
#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
/*
* function: zfcp_fsf_req_alloc
*
* purpose: Obtains an fsf_req and potentially a qtcb (for all but
* unsolicited requests) via helper functions
* Does some initial fsf request set-up.
*
* returns: pointer to allocated fsf_req if successfull
* NULL otherwise
*
* locks: none
*
*/
static struct zfcp_fsf_req *
zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
{
size_t size;
void *ptr;
struct zfcp_fsf_req *fsf_req = NULL;
if (req_flags & ZFCP_REQ_NO_QTCB)
size = sizeof(struct zfcp_fsf_req);
else
size = sizeof(struct zfcp_fsf_req_qtcb);
if (likely(pool))
ptr = mempool_alloc(pool, GFP_ATOMIC);
else {
if (req_flags & ZFCP_REQ_NO_QTCB)
ptr = kmalloc(size, GFP_ATOMIC);
else
ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
GFP_ATOMIC);
}
if (unlikely(!ptr))
goto out;
memset(ptr, 0, size);
if (req_flags & ZFCP_REQ_NO_QTCB) {
fsf_req = (struct zfcp_fsf_req *) ptr;
} else {
fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
}
fsf_req->pool = pool;
out:
return fsf_req;
}
/*
* function: zfcp_fsf_req_free
*
* purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
* returns it into the pool via helper functions.
*
* returns: sod all
*
* locks: none
*/
void
zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
{
if (likely(fsf_req->pool)) {
mempool_free(fsf_req, fsf_req->pool);
return;
}
if (fsf_req->qtcb) {
kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
return;
}
kfree(fsf_req);
}
/*
* 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 *fsf_req, *tmp;
unsigned long flags;
LIST_HEAD(remove_queue);
unsigned int i;
BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
spin_lock_irqsave(&adapter->req_list_lock, flags);
atomic_set(&adapter->reqs_active, 0);
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(fsf_req, tmp, &remove_queue, list) {
list_del(&fsf_req->list);
fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
zfcp_fsf_req_complete(fsf_req);
}
}
/*
* function: zfcp_fsf_req_complete
*
* purpose: Updates active counts and timers for openfcp-reqs
* May cleanup request after req_eval returns
*
* returns: 0 - success
* !0 - failure
*
* context:
*/
int
zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
int cleanup;
if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
ZFCP_LOG_DEBUG("Status read response received\n");
/*
* Note: all cleanup handling is done in the callchain of
* the function call-chain below.
*/
zfcp_fsf_status_read_handler(fsf_req);
goto out;
} else {
del_timer(&fsf_req->timer);
zfcp_fsf_protstatus_eval(fsf_req);
}
/*
* fsf_req may be deleted due to waking up functions, so
* cleanup is saved here and used later
*/
if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
cleanup = 1;
else
cleanup = 0;
fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
/* cleanup request if requested by initiator */
if (likely(cleanup)) {
ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
/*
* lock must not be held here since it will be
* grabed by the called routine, too
*/
zfcp_fsf_req_free(fsf_req);
} else {
/* notify initiator waiting for the requests completion */
ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
/*
* 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(&fsf_req->completion_wq);
}
out:
return retval;
}
/*
* function: zfcp_fsf_protstatus_eval
*
* purpose: evaluates the QTCB of the finished FSF request
* and initiates appropriate actions
* (usually calling FSF command specific handlers)
*
* returns:
*
* context:
*
* locks:
*/
static int
zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_qtcb *qtcb = fsf_req->qtcb;
union fsf_prot_status_qual *prot_status_qual =
&qtcb->prefix.prot_status_qual;
zfcp_hba_dbf_event_fsf_response(fsf_req);
if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
(unsigned long) fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
goto skip_protstatus;
}
/* evaluate FSF Protocol Status */
switch (qtcb->prefix.prot_status) {
case FSF_PROT_GOOD:
case FSF_PROT_FSF_STATUS_PRESENTED:
break;
case FSF_PROT_QTCB_VERSION_ERROR:
ZFCP_LOG_NORMAL("error: The adapter %s contains "
"microcode of version 0x%x, the device driver "
"only supports 0x%x. Aborting.\n",
zfcp_get_busid_by_adapter(adapter),
prot_status_qual->version_error.fsf_version,
ZFCP_QTCB_VERSION);
zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_SEQ_NUMB_ERROR:
ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
"driver (0x%x) and adapter %s (0x%x). "
"Restarting all operations on this adapter.\n",
qtcb->prefix.req_seq_no,
zfcp_get_busid_by_adapter(adapter),
prot_status_qual->sequence_error.exp_req_seq_no);
zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_UNSUPP_QTCB_TYPE:
ZFCP_LOG_NORMAL("error: Packet header type used by the "
"device driver is incompatible with "
"that used on adapter %s. "
"Stopping all operations on this adapter.\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_HOST_CONNECTION_INITIALIZING:
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
&(adapter->status));
break;
case FSF_PROT_DUPLICATE_REQUEST_ID:
ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
"to the adapter %s is ambiguous. "
"Stopping all operations on this adapter.\n",
*(unsigned long long*)
(&qtcb->bottom.support.req_handle),
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_LINK_DOWN:
zfcp_fsf_link_down_info_eval(fsf_req, 37,
&prot_status_qual->link_down_info);
/* FIXME: reopening adapter now? better wait for link up */
zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_REEST_QUEUE:
ZFCP_LOG_NORMAL("The local link to adapter with "
"%s was re-plugged. "
"Re-starting operations on this adapter.\n",
zfcp_get_busid_by_adapter(adapter));
/* 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, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_ERROR_STATE:
ZFCP_LOG_NORMAL("error: The adapter %s "
"has entered the error state. "
"Restarting all operations on this "
"adapter.\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
"provided by the adapter %s "
"is not compatible with the device driver. "
"Stopping all operations on this adapter. "
"(debug info 0x%x).\n",
zfcp_get_busid_by_adapter(adapter),
qtcb->prefix.prot_status);
zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
skip_protstatus:
/*
* always call specific handlers to give them a chance to do
* something meaningful even in error cases
*/
zfcp_fsf_fsfstatus_eval(fsf_req);
return retval;
}
/*
* function: zfcp_fsf_fsfstatus_eval
*
* purpose: evaluates FSF status of completed FSF request
* and acts accordingly
*
* returns:
*/
static int
zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
goto skip_fsfstatus;
}
/* evaluate FSF Status */
switch (fsf_req->qtcb->header.fsf_status) {
case FSF_UNKNOWN_COMMAND:
ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
"not known by the adapter %s "
"Stopping all operations on this adapter. "
"(debug info 0x%x).\n",
zfcp_get_busid_by_adapter(fsf_req->adapter),
fsf_req->qtcb->header.fsf_command);
zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_FCP_RSP_AVAILABLE:
ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
"SCSI stack.\n");
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
zfcp_fsf_fsfstatus_qual_eval(fsf_req);
break;
}
skip_fsfstatus:
/*
* always call specific handlers to give them a chance to do
* something meaningful even in error cases
*/
zfcp_fsf_req_dispatch(fsf_req);
return retval;
}
/*
* function: zfcp_fsf_fsfstatus_qual_eval
*
* purpose: evaluates FSF status-qualifier of completed FSF request
* and acts accordingly
*
* returns:
*/
static int
zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_FCP_RSP_AVAILABLE:
break;
case FSF_SQ_RETRY_IF_POSSIBLE:
/* The SCSI-stack may now issue retries or escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_COMMAND_ABORTED:
/* Carry the aborted state on to upper layer */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_NO_RECOM:
ZFCP_LOG_NORMAL("bug: No recommendation could be given for a "
"problem on the adapter %s "
"Stopping all operations on this adapter. ",
zfcp_get_busid_by_adapter(fsf_req->adapter));
zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_PROGRAMMING_ERROR:
ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
"(adapter %s)\n",
zfcp_get_busid_by_adapter(fsf_req->adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
case FSF_SQ_NO_RETRY_POSSIBLE:
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* dealt with in the respective functions */
break;
default:
ZFCP_LOG_NORMAL("bug: Additional status info could "
"not be interpreted properly.\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
(char *) &fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
return retval;
}
/**
* zfcp_fsf_link_down_info_eval - evaluate link down information block
*/
static void
zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id,
struct fsf_link_down_info *link_down)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
&adapter->status))
return;
atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
if (link_down == NULL)
goto out;
switch (link_down->error_code) {
case FSF_PSQ_LINK_NO_LIGHT:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(no light detected)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_WRAP_PLUG:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(wrap plug detected)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_NO_FCP:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(adjacent node on link does not support FCP)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_FIRMWARE_UPDATE:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(firmware update in progress)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_INVALID_WWPN:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(duplicate or invalid WWPN detected)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(no support for NPIV by Fabric)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_NO_FCP_RESOURCES:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(out of resource in FCP daughtercard)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(out of resource in Fabric)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(unable to Fabric login)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
ZFCP_LOG_NORMAL("WWPN assignment file corrupted on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
ZFCP_LOG_NORMAL("Mode table corrupted on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
ZFCP_LOG_NORMAL("No WWPN for assignment table on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
break;
default:
ZFCP_LOG_NORMAL("The local link to adapter %s is down "
"(warning: unknown reason code %d)\n",
zfcp_get_busid_by_adapter(adapter),
link_down->error_code);
}
if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
ZFCP_LOG_DEBUG("Debug information to link down: "
"primary_status=0x%02x "
"ioerr_code=0x%02x "
"action_code=0x%02x "
"reason_code=0x%02x "
"explanation_code=0x%02x "
"vendor_specific_code=0x%02x\n",
link_down->primary_status,
link_down->ioerr_code,
link_down->action_code,
link_down->reason_code,
link_down->explanation_code,
link_down->vendor_specific_code);
out:
zfcp_erp_adapter_failed(adapter, id, fsf_req);
}
/*
* function: zfcp_fsf_req_dispatch
*
* purpose: calls the appropriate command specific handler
*
* returns:
*/
static int
zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_erp_action *erp_action = fsf_req->erp_action;
struct zfcp_adapter *adapter = fsf_req->adapter;
int retval = 0;
switch (fsf_req->fsf_command) {
case FSF_QTCB_FCP_CMND:
zfcp_fsf_send_fcp_command_handler(fsf_req);
break;
case FSF_QTCB_ABORT_FCP_CMND:
zfcp_fsf_abort_fcp_command_handler(fsf_req);
break;
case FSF_QTCB_SEND_GENERIC:
zfcp_fsf_send_ct_handler(fsf_req);
break;
case FSF_QTCB_OPEN_PORT_WITH_DID:
zfcp_fsf_open_port_handler(fsf_req);
break;
case FSF_QTCB_OPEN_LUN:
zfcp_fsf_open_unit_handler(fsf_req);
break;
case FSF_QTCB_CLOSE_LUN:
zfcp_fsf_close_unit_handler(fsf_req);
break;
case FSF_QTCB_CLOSE_PORT:
zfcp_fsf_close_port_handler(fsf_req);
break;
case FSF_QTCB_CLOSE_PHYSICAL_PORT:
zfcp_fsf_close_physical_port_handler(fsf_req);
break;
case FSF_QTCB_EXCHANGE_CONFIG_DATA:
zfcp_fsf_exchange_config_data_handler(fsf_req);
break;
case FSF_QTCB_EXCHANGE_PORT_DATA:
zfcp_fsf_exchange_port_data_handler(fsf_req);
break;
case FSF_QTCB_SEND_ELS:
zfcp_fsf_send_els_handler(fsf_req);
break;
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
zfcp_fsf_control_file_handler(fsf_req);
break;
case FSF_QTCB_UPLOAD_CONTROL_FILE:
zfcp_fsf_control_file_handler(fsf_req);
break;
default:
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
"not supported by the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
ZFCP_LOG_NORMAL
("bug: Command issued by the device driver differs "
"from the command returned by the adapter %s "
"(debug info 0x%x, 0x%x).\n",
zfcp_get_busid_by_adapter(adapter),
fsf_req->fsf_command,
fsf_req->qtcb->header.fsf_command);
}
if (!erp_action)
return retval;
zfcp_erp_async_handler(erp_action, 0);
return retval;
}
/*
* function: zfcp_fsf_status_read
*
* purpose: initiates a Status Read command at the specified adapter
*
* returns:
*/
int
zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
{
struct zfcp_fsf_req *fsf_req;
struct fsf_status_read_buffer *status_buffer;
unsigned long lock_flags;
volatile struct qdio_buffer_element *sbale;
int retval;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
req_flags | ZFCP_REQ_NO_QTCB,
adapter->pool.fsf_req_status_read,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create unsolicited status "
"buffer for adapter %s.\n",
zfcp_get_busid_by_adapter(adapter));
goto failed_req_create;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->sbale_curr = 2;
retval = -ENOMEM;
status_buffer =
mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
if (!status_buffer)
goto failed_buf;
memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
fsf_req->data = (unsigned long) status_buffer;
/* insert pointer to respective buffer */
sbale = zfcp_qdio_sbale_curr(fsf_req);
sbale->addr = (void *) status_buffer;
sbale->length = sizeof(struct fsf_status_read_buffer);
retval = zfcp_fsf_req_send(fsf_req);
if (retval) {
ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
"environment.\n");
goto failed_req_send;
}
ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
zfcp_get_busid_by_adapter(adapter));
goto out;
failed_req_send:
mempool_free(status_buffer, adapter->pool.data_status_read);
failed_buf:
zfcp_fsf_req_free(fsf_req);
failed_req_create:
zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
out:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
return retval;
}
static int
zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
{
struct fsf_status_read_buffer *status_buffer;
struct zfcp_adapter *adapter;
struct zfcp_port *port;
unsigned long flags;
status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
adapter = fsf_req->adapter;
read_lock_irqsave(&zfcp_data.config_lock, flags);
list_for_each_entry(port, &adapter->port_list_head, list)
if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
break;
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
ZFCP_LOG_NORMAL("bug: Reopen port indication received for "
"nonexisting port with d_id 0x%06x on "
"adapter %s. Ignored.\n",
status_buffer->d_id & ZFCP_DID_MASK,
zfcp_get_busid_by_adapter(adapter));
goto out;
}
switch (status_buffer->status_subtype) {
case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
zfcp_erp_port_reopen(port, 0, 101, fsf_req);
break;
case FSF_STATUS_READ_SUB_ERROR_PORT:
zfcp_erp_port_shutdown(port, 0, 122, fsf_req);
break;
default:
ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
"for a reopen indication on port with "
"d_id 0x%06x on the adapter %s. "
"Ignored. (debug info 0x%x)\n",
status_buffer->d_id,
zfcp_get_busid_by_adapter(adapter),
status_buffer->status_subtype);
}
out:
return 0;
}
/*
* function: zfcp_fsf_status_read_handler
*
* purpose: is called for finished Open Port command
*
* returns:
*/
static int
zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *) fsf_req->data;
struct fsf_bit_error_payload *fsf_bit_error;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
mempool_free(status_buffer, adapter->pool.data_status_read);
zfcp_fsf_req_free(fsf_req);
goto out;
}
zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
switch (status_buffer->status_type) {
case FSF_STATUS_READ_PORT_CLOSED:
zfcp_fsf_status_read_port_closed(fsf_req);
break;
case FSF_STATUS_READ_INCOMING_ELS:
zfcp_fc_incoming_els(fsf_req);
break;
case FSF_STATUS_READ_SENSE_DATA_AVAIL:
ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
fsf_bit_error = (struct fsf_bit_error_payload *)
status_buffer->payload;
ZFCP_LOG_NORMAL("Warning: bit error threshold data "
"received (adapter %s, "
"link failures = %i, loss of sync errors = %i, "
"loss of signal errors = %i, "
"primitive sequence errors = %i, "
"invalid transmission word errors = %i, "
"CRC errors = %i)\n",
zfcp_get_busid_by_adapter(adapter),
fsf_bit_error->link_failure_error_count,
fsf_bit_error->loss_of_sync_error_count,
fsf_bit_error->loss_of_signal_error_count,
fsf_bit_error->primitive_sequence_error_count,
fsf_bit_error->invalid_transmission_word_error_count,
fsf_bit_error->crc_error_count);
ZFCP_LOG_INFO("Additional bit error threshold data "
"(adapter %s, "
"primitive sequence event time-outs = %i, "
"elastic buffer overrun errors = %i, "
"advertised receive buffer-to-buffer credit = %i, "
"current receice buffer-to-buffer credit = %i, "
"advertised transmit buffer-to-buffer credit = %i, "
"current transmit buffer-to-buffer credit = %i)\n",
zfcp_get_busid_by_adapter(adapter),
fsf_bit_error->primitive_sequence_event_timeout_count,
fsf_bit_error->elastic_buffer_overrun_error_count,
fsf_bit_error->advertised_receive_b2b_credit,
fsf_bit_error->current_receive_b2b_credit,
fsf_bit_error->advertised_transmit_b2b_credit,
fsf_bit_error->current_transmit_b2b_credit);
break;
case FSF_STATUS_READ_LINK_DOWN:
switch (status_buffer->status_subtype) {
case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
ZFCP_LOG_INFO("Physical link to adapter %s is down\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_fsf_link_down_info_eval(fsf_req, 38,
(struct fsf_link_down_info *)
&status_buffer->payload);
break;
case FSF_STATUS_READ_SUB_FDISC_FAILED:
ZFCP_LOG_INFO("Local link to adapter %s is down "
"due to failed FDISC login\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_fsf_link_down_info_eval(fsf_req, 39,
(struct fsf_link_down_info *)
&status_buffer->payload);
break;
case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
ZFCP_LOG_INFO("Local link to adapter %s is down "
"due to firmware update on adapter\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL);
break;
default:
ZFCP_LOG_INFO("Local link to adapter %s is down "
"due to unknown reason\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL);
};
break;
case FSF_STATUS_READ_LINK_UP:
ZFCP_LOG_NORMAL("Local link to adapter %s was replugged. "
"Restarting operations on this adapter\n",
zfcp_get_busid_by_adapter(adapter));
/* 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, fsf_req);
break;
case FSF_STATUS_READ_NOTIFICATION_LOST:
ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: "
"adapter %s%s%s%s%s%s%s%s%s\n",
zfcp_get_busid_by_adapter(adapter),
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_INCOMING_ELS) ?
", incoming ELS" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_SENSE_DATA) ?
", sense data" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_LINK_STATUS) ?
", link status change" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_PORT_CLOSED) ?
", port close" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ?
", bit error exception" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_ACT_UPDATED) ?
", ACT update" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_ACT_HARDENED) ?
", ACT hardening" : "",
(status_buffer->status_subtype &
FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ?
", adapter feature change" : "");
if (status_buffer->status_subtype &
FSF_STATUS_READ_SUB_ACT_UPDATED)
zfcp_erp_adapter_access_changed(adapter, 135, fsf_req);
break;
case FSF_STATUS_READ_CFDC_UPDATED:
ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_access_changed(adapter, 136, fsf_req);
break;
case FSF_STATUS_READ_CFDC_HARDENED:
switch (status_buffer->status_subtype) {
case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
ZFCP_LOG_NORMAL("CFDC of adapter %s saved on SE\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
ZFCP_LOG_NORMAL("CFDC of adapter %s has been copied "
"to the secondary SE\n",
zfcp_get_busid_by_adapter(adapter));
break;
default:
ZFCP_LOG_NORMAL("CFDC of adapter %s has been hardened\n",
zfcp_get_busid_by_adapter(adapter));
}
break;
case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
ZFCP_LOG_INFO("List of supported features on adapter %s has "
"been changed from 0x%08X to 0x%08X\n",
zfcp_get_busid_by_adapter(adapter),
*(u32*) (status_buffer->payload + 4),
*(u32*) (status_buffer->payload));
adapter->adapter_features = *(u32*) status_buffer->payload;
break;
default:
ZFCP_LOG_NORMAL("warning: An unsolicited status packet of unknown "
"type was received (debug info 0x%x)\n",
status_buffer->status_type);
ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
status_buffer);
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) status_buffer,
sizeof (struct fsf_status_read_buffer));
break;
}
mempool_free(status_buffer, adapter->pool.data_status_read);
zfcp_fsf_req_free(fsf_req);
/*
* recycle buffer and start new request repeat until outbound
* queue is empty or adapter shutdown is requested
*/
/*
* FIXME(qdio):
* we may wait in the req_create for 5s during shutdown, so
* qdio_cleanup will have to wait at least that long before returning
* with failure to allow us a proper cleanup under all circumstances
*/
/*
* FIXME:
* allocation failure possible? (Is this code needed?)
*/
atomic_inc(&adapter->stat_miss);
schedule_work(&adapter->stat_work);
out:
return retval;
}
/*
* function: zfcp_fsf_abort_fcp_command
*
* purpose: tells FSF to abort a running SCSI command
*
* returns: address of initiated FSF request
* NULL - request could not be initiated
*
* FIXME(design): should be watched by a timeout !!!
* FIXME(design) shouldn't this be modified to return an int
* also...don't know how though
*/
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)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req = NULL;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
req_flags, adapter->pool.fsf_req_abort,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Failed to create an abort command "
"request for lun 0x%016Lx on port 0x%016Lx "
"on adapter %s.\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_adapter(adapter));
goto out;
}
if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
&unit->status)))
goto unit_blocked;
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->data = (unsigned long) unit;
/* set handles of unit and its parent port in QTCB */
fsf_req->qtcb->header.lun_handle = unit->handle;
fsf_req->qtcb->header.port_handle = unit->port->handle;
/* set handle of request which should be aborted */
fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
if (!retval)
goto out;
unit_blocked:
zfcp_fsf_req_free(fsf_req);
fsf_req = NULL;
out:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
return fsf_req;
}
/*
* function: zfcp_fsf_abort_fcp_command_handler
*
* purpose: is called for finished Abort FCP Command request
*
* returns:
*/
static int
zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
{
int retval = -EINVAL;
struct zfcp_unit *unit;
union fsf_status_qual *fsf_stat_qual =
&new_fsf_req->qtcb->header.fsf_status_qual;
if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
goto skip_fsfstatus;
}
unit = (struct zfcp_unit *) new_fsf_req->data;
/* evaluate FSF status in QTCB */
switch (new_fsf_req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
/*
* In this case a command that was sent prior to a port
* reopen was aborted (handles are different). This is
* fine.
*/
} else {
ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
"port 0x%016Lx on adapter %s invalid. "
"This may happen occasionally.\n",
unit->port->handle,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
ZFCP_LOG_INFO("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
(char *) &new_fsf_req->qtcb->header.
fsf_status_qual,
sizeof (union fsf_status_qual));
/* Let's hope this sorts out the mess */
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
new_fsf_req);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
case FSF_LUN_HANDLE_NOT_VALID:
if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
/*
* In this case a command that was sent prior to a unit
* reopen was aborted (handles are different).
* This is fine.
*/
} else {
ZFCP_LOG_INFO
("Warning: Temporary LUN identifier 0x%x of LUN "
"0x%016Lx on port 0x%016Lx on adapter %s is "
"invalid. This may happen in rare cases. "
"Trying to re-establish link.\n",
unit->handle,
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
ZFCP_LOG_DEBUG("Status qualifier data:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &new_fsf_req->qtcb->header.
fsf_status_qual,
sizeof (union fsf_status_qual));
/* Let's hope this sorts out the mess */
zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
case FSF_FCP_COMMAND_DOES_NOT_EXIST:
retval = 0;
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
"be reopened\n", unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
zfcp_erp_port_boxed(unit->port, 47, new_fsf_req);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_BOXED:
ZFCP_LOG_INFO(
"unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
"to be reopened\n",
unit->fcp_lun, unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
zfcp_erp_unit_boxed(unit, 48, new_fsf_req);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
zfcp_test_link(unit->port);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* SCSI stack will escalate */
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL
("bug: Wrong status qualifier 0x%x arrived.\n",
new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
break;
}
break;
case FSF_GOOD:
retval = 0;
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
new_fsf_req->qtcb->header.fsf_status);
break;
}
skip_fsfstatus:
return retval;
}
/**
* zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
* one SBALE
* Two scatter-gather lists are passed, one for the reqeust and one for the
* response.
*/
static inline int
zfcp_use_one_sbal(struct scatterlist *req, int req_count,
struct scatterlist *resp, int resp_count)
{
return ((req_count == 1) &&
(resp_count == 1) &&
(((unsigned long) zfcp_sg_to_address(&req[0]) &
PAGE_MASK) ==
((unsigned long) (zfcp_sg_to_address(&req[0]) +
req[0].length - 1) & PAGE_MASK)) &&
(((unsigned long) zfcp_sg_to_address(&resp[0]) &
PAGE_MASK) ==
((unsigned long) (zfcp_sg_to_address(&resp[0]) +
resp[0].length - 1) & PAGE_MASK)));
}
/**
* zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
* @ct: pointer to struct zfcp_send_ct which conatins all needed data for
* the request
* @pool: pointer to memory pool, if non-null this pool is used to allocate
* a struct zfcp_fsf_req
* @erp_action: pointer to erp_action, if non-null the Generic Service request
* is sent within error recovery
*/
int
zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_port *port;
struct zfcp_adapter *adapter;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int bytes;
int ret = 0;
port = ct->port;
adapter = port->adapter;
ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
pool, &lock_flags, &fsf_req);
if (ret < 0) {
ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
"adapter: %s\n",
zfcp_get_busid_by_adapter(adapter));
goto failed_req;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
if (zfcp_use_one_sbal(ct->req, ct->req_count,
ct->resp, ct->resp_count)){
/* both request buffer and response buffer
fit into one sbale each */
sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
sbale[2].length = ct->req[0].length;
sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
sbale[3].length = ct->resp[0].length;
sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
} else if (adapter->adapter_features &
FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
/* try to use chained SBALs */
bytes = zfcp_qdio_sbals_from_sg(fsf_req,
SBAL_FLAGS0_TYPE_WRITE_READ,
ct->req, ct->req_count,
ZFCP_MAX_SBALS_PER_CT_REQ);
if (bytes <= 0) {
ZFCP_LOG_INFO("error: creation of CT request failed "
"on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
if (bytes == 0)
ret = -ENOMEM;
else
ret = bytes;
goto failed_send;
}
fsf_req->qtcb->bottom.support.req_buf_length = bytes;
fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
bytes = zfcp_qdio_sbals_from_sg(fsf_req,
SBAL_FLAGS0_TYPE_WRITE_READ,
ct->resp, ct->resp_count,
ZFCP_MAX_SBALS_PER_CT_REQ);
if (bytes <= 0) {
ZFCP_LOG_INFO("error: creation of CT request failed "
"on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
if (bytes == 0)
ret = -ENOMEM;
else
ret = bytes;
goto failed_send;
}
fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
} else {
/* reject send generic request */
ZFCP_LOG_INFO(
"error: microcode does not support chained SBALs,"
"CT request too big (adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
ret = -EOPNOTSUPP;
goto failed_send;
}
/* settings in QTCB */
fsf_req->qtcb->header.port_handle = port->handle;
fsf_req->qtcb->bottom.support.service_class =
ZFCP_FC_SERVICE_CLASS_DEFAULT;
fsf_req->qtcb->bottom.support.timeout = ct->timeout;
fsf_req->data = (unsigned long) ct;
zfcp_san_dbf_event_ct_request(fsf_req);
if (erp_action) {
erp_action->fsf_req = fsf_req;
fsf_req->erp_action = erp_action;
zfcp_erp_start_timer(fsf_req);
} else
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
ret = zfcp_fsf_req_send(fsf_req);
if (ret) {
ZFCP_LOG_DEBUG("error: initiation of CT request failed "
"(adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(adapter), port->wwpn);
goto failed_send;
}
ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(adapter), port->wwpn);
goto out;
failed_send:
zfcp_fsf_req_free(fsf_req);
if (erp_action != NULL) {
erp_action->fsf_req = NULL;
}
failed_req:
out:
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
return ret;
}
/**
* zfcp_fsf_send_ct_handler - handler for Generic Service requests
* @fsf_req: pointer to struct zfcp_fsf_req
*
* Data specific for the Generic Service request is passed using
* fsf_req->data. There we find the pointer to struct zfcp_send_ct.
* Usually a specific handler for the CT request is called which is
* found in this structure.
*/
static int
zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_port *port;
struct zfcp_adapter *adapter;
struct zfcp_send_ct *send_ct;
struct fsf_qtcb_header *header;
struct fsf_qtcb_bottom_support *bottom;
int retval = -EINVAL;
u16 subtable, rule, counter;
adapter = fsf_req->adapter;
send_ct = (struct zfcp_send_ct *) fsf_req->data;
port = send_ct->port;
header = &fsf_req->qtcb->header;
bottom = &fsf_req->qtcb->bottom.support;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
/* evaluate FSF status in QTCB */
switch (header->fsf_status) {
case FSF_GOOD:
zfcp_san_dbf_event_ct_response(fsf_req);
retval = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
ZFCP_LOG_INFO("error: adapter %s does not support fc "
"class %d.\n",
zfcp_get_busid_by_port(port),
ZFCP_FC_SERVICE_CLASS_DEFAULT);
/* stop operation for this adapter */
zfcp_erp_adapter_shutdown(adapter, 0, 123, fsf_req);
fsf_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:
/* reopening link to port */
zfcp_test_link(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
"arrived.\n",
header->fsf_status_qual.word[0]);
break;
}
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_NORMAL("access denied, cannot send generic service "
"command (adapter %s, port d_id=0x%06x)\n",
zfcp_get_busid_by_port(port), port->d_id);
for (counter = 0; counter < 2; counter++) {
subtable = header->fsf_status_qual.halfword[counter * 2];
rule = header->fsf_status_qual.halfword[counter * 2 + 1];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
zfcp_act_subtable_type[subtable], rule);
break;
}
}
zfcp_erp_port_access_denied(port, 55, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_GENERIC_COMMAND_REJECTED:
ZFCP_LOG_INFO("generic service command rejected "
"(adapter %s, port d_id=0x%06x)\n",
zfcp_get_busid_by_port(port), port->d_id);
ZFCP_LOG_INFO("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
"0x%016Lx on adapter %s invalid. This may "
"happen occasionally.\n", port->handle,
port->wwpn, zfcp_get_busid_by_port(port));
ZFCP_LOG_INFO("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_INFO("port needs to be reopened "
"(adapter %s, port d_id=0x%06x)\n",
zfcp_get_busid_by_port(port), port->d_id);
zfcp_erp_port_boxed(port, 49, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
/* following states should never occure, all cases avoided
in zfcp_fsf_send_ct - but who knows ... */
case FSF_PAYLOAD_SIZE_MISMATCH:
ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
"req_buf_length=%d, resp_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->req_buf_length, bottom->resp_buf_length);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_REQUEST_SIZE_TOO_LARGE:
ZFCP_LOG_INFO("request size too large (adapter: %s, "
"req_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->req_buf_length);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_RESPONSE_SIZE_TOO_LARGE:
ZFCP_LOG_INFO("response size too large (adapter: %s, "
"resp_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->resp_buf_length);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SBAL_MISMATCH:
ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
"resp_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->req_buf_length, bottom->resp_buf_length);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n", header->fsf_status);
break;
}
skip_fsfstatus:
send_ct->status = retval;
if (send_ct->handler != NULL)
send_ct->handler(send_ct->handler_data);
return retval;
}
/**
* zfcp_fsf_send_els - initiate an ELS command (FC-FS)
* @els: pointer to struct zfcp_send_els which contains all needed data for
* the command.
*/
int
zfcp_fsf_send_els(struct zfcp_send_els *els)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
u32 d_id;
struct zfcp_adapter *adapter;
unsigned long lock_flags;
int bytes;
int ret = 0;
d_id = els->d_id;
adapter = els->adapter;
ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
ZFCP_REQ_AUTO_CLEANUP,
NULL, &lock_flags, &fsf_req);
if (ret < 0) {
ZFCP_LOG_INFO("error: creation of ELS request failed "
"(adapter %s, port d_id: 0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
goto failed_req;
}
if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
&els->port->status))) {
ret = -EBUSY;
goto port_blocked;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
if (zfcp_use_one_sbal(els->req, els->req_count,
els->resp, els->resp_count)){
/* both request buffer and response buffer
fit into one sbale each */
sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
sbale[2].length = els->req[0].length;
sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
sbale[3].length = els->resp[0].length;
sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
} else if (adapter->adapter_features &
FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
/* try to use chained SBALs */
bytes = zfcp_qdio_sbals_from_sg(fsf_req,
SBAL_FLAGS0_TYPE_WRITE_READ,
els->req, els->req_count,
ZFCP_MAX_SBALS_PER_ELS_REQ);
if (bytes <= 0) {
ZFCP_LOG_INFO("error: creation of ELS request failed "
"(adapter %s, port d_id: 0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
if (bytes == 0) {
ret = -ENOMEM;
} else {
ret = bytes;
}
goto failed_send;
}
fsf_req->qtcb->bottom.support.req_buf_length = bytes;
fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
bytes = zfcp_qdio_sbals_from_sg(fsf_req,
SBAL_FLAGS0_TYPE_WRITE_READ,
els->resp, els->resp_count,
ZFCP_MAX_SBALS_PER_ELS_REQ);
if (bytes <= 0) {
ZFCP_LOG_INFO("error: creation of ELS request failed "
"(adapter %s, port d_id: 0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
if (bytes == 0) {
ret = -ENOMEM;
} else {
ret = bytes;
}
goto failed_send;
}
fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
} else {
/* reject request */
ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
", ELS request too big (adapter %s, "
"port d_id: 0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
ret = -EOPNOTSUPP;
goto failed_send;
}
/* settings in QTCB */
fsf_req->qtcb->bottom.support.d_id = d_id;
fsf_req->qtcb->bottom.support.service_class =
ZFCP_FC_SERVICE_CLASS_DEFAULT;
fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
fsf_req->data = (unsigned long) els;
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
zfcp_san_dbf_event_els_request(fsf_req);
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
ret = zfcp_fsf_req_send(fsf_req);
if (ret) {
ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
"(adapter %s, port d_id: 0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
goto failed_send;
}
ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
"0x%06x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
goto out;
port_blocked:
failed_send:
zfcp_fsf_req_free(fsf_req);
failed_req:
out:
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
return ret;
}
/**
* zfcp_fsf_send_els_handler - handler for ELS commands
* @fsf_req: pointer to struct zfcp_fsf_req
*
* Data specific for the ELS command is passed using
* fsf_req->data. There we find the pointer to struct zfcp_send_els.
* Usually a specific handler for the ELS command is called which is
* found in this structure.
*/
static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter;
struct zfcp_port *port;
u32 d_id;
struct fsf_qtcb_header *header;
struct fsf_qtcb_bottom_support *bottom;
struct zfcp_send_els *send_els;
int retval = -EINVAL;
u16 subtable, rule, counter;
send_els = (struct zfcp_send_els *) fsf_req->data;
adapter = send_els->adapter;
port = send_els->port;
d_id = send_els->d_id;
header = &fsf_req->qtcb->header;
bottom = &fsf_req->qtcb->bottom.support;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
switch (header->fsf_status) {
case FSF_GOOD:
zfcp_san_dbf_event_els_response(fsf_req);
retval = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
ZFCP_LOG_INFO("error: adapter %s does not support fc "
"class %d.\n",
zfcp_get_busid_by_adapter(adapter),
ZFCP_FC_SERVICE_CLASS_DEFAULT);
/* stop operation for this adapter */
zfcp_erp_adapter_shutdown(adapter, 0, 124, fsf_req);
fsf_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:
if (port && (send_els->ls_code != ZFCP_LS_ADISC))
zfcp_test_link(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_RETRY_IF_POSSIBLE:
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
header->fsf_status_qual.word[0]);
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
(char*)header->fsf_status_qual.word, 16);
}
break;
case FSF_ELS_COMMAND_REJECTED:
ZFCP_LOG_INFO("ELS has been rejected because command filter "
"prohibited sending "
"(adapter: %s, port d_id: 0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
break;
case FSF_PAYLOAD_SIZE_MISMATCH:
ZFCP_LOG_INFO(
"ELS request size and ELS response size must be either "
"both 0, or both greater than 0 "
"(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->req_buf_length,
bottom->resp_buf_length);
break;
case FSF_REQUEST_SIZE_TOO_LARGE:
ZFCP_LOG_INFO(
"Length of the ELS request buffer, "
"specified in QTCB bottom, "
"exceeds the size of the buffers "
"that have been allocated for ELS request data "
"(adapter: %s, req_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->req_buf_length);
break;
case FSF_RESPONSE_SIZE_TOO_LARGE:
ZFCP_LOG_INFO(
"Length of the ELS response buffer, "
"specified in QTCB bottom, "
"exceeds the size of the buffers "
"that have been allocated for ELS response data "
"(adapter: %s, resp_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->resp_buf_length);
break;
case FSF_SBAL_MISMATCH:
/* should never occure, avoided in zfcp_fsf_send_els */
ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
"resp_buf_length=%d)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->req_buf_length, bottom->resp_buf_length);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
"(adapter %s, port d_id=0x%06x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
for (counter = 0; counter < 2; counter++) {
subtable = header->fsf_status_qual.halfword[counter * 2];
rule = header->fsf_status_qual.halfword[counter * 2 + 1];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
zfcp_act_subtable_type[subtable], rule);
break;
}
}
if (port != NULL)
zfcp_erp_port_access_denied(port, 56, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL(
"bug: An unknown FSF Status was presented "
"(adapter: %s, fsf_status=0x%08x)\n",
zfcp_get_busid_by_adapter(adapter),
header->fsf_status);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
skip_fsfstatus:
send_els->status = retval;
if (send_els->handler)
send_els->handler(send_els->handler_data);
return retval;
}
int
zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
struct zfcp_adapter *adapter = erp_action->adapter;
unsigned long lock_flags;
int retval;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter,
FSF_QTCB_EXCHANGE_CONFIG_DATA,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not create exchange configuration "
"data request for adapter %s.\n",
zfcp_get_busid_by_adapter(adapter));
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->qtcb->bottom.config.feature_selection =
FSF_FEATURE_CFDC |
FSF_FEATURE_LUN_SHARING |
FSF_FEATURE_NOTIFICATION_LOST |
FSF_FEATURE_UPDATE_ALERT;
fsf_req->erp_action = erp_action;
erp_action->fsf_req = fsf_req;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(fsf_req);
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
if (retval) {
ZFCP_LOG_INFO("error: Could not send exchange configuration "
"data command on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
}
else
ZFCP_LOG_DEBUG("exchange configuration data request initiated "
"(adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
return retval;
}
int
zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
struct fsf_qtcb_bottom_config *data)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags,
&fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not create exchange configuration "
"data request for adapter %s.\n",
zfcp_get_busid_by_adapter(adapter));
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->qtcb->bottom.config.feature_selection =
FSF_FEATURE_CFDC |
FSF_FEATURE_LUN_SHARING |
FSF_FEATURE_NOTIFICATION_LOST |
FSF_FEATURE_UPDATE_ALERT;
if (data)
fsf_req->data = (unsigned long) data;
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
if (retval)
ZFCP_LOG_INFO("error: Could not send exchange configuration "
"data command on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
else
wait_event(fsf_req->completion_wq,
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
zfcp_fsf_req_free(fsf_req);
return retval;
}
/**
* zfcp_fsf_exchange_config_evaluate
* @fsf_req: fsf_req which belongs to xchg config data request
* @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
*
* returns: -EIO on error, 0 otherwise
*/
static int
zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
{
struct fsf_qtcb_bottom_config *bottom;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct Scsi_Host *shost = adapter->scsi_host;
bottom = &fsf_req->qtcb->bottom.config;
ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
bottom->low_qtcb_version, bottom->high_qtcb_version);
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;
if (xchg_ok) {
if (fsf_req->data)
memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
bottom, sizeof (struct fsf_qtcb_bottom_config));
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);
if (bottom->fc_topology == 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;
} else if (bottom->fc_topology == FSF_TOPO_FABRIC)
fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
else if (bottom->fc_topology == FSF_TOPO_AL)
fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
else
fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
} else {
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;
}
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_req->erp_action)
ZFCP_LOG_NORMAL("The adapter %s reported the following "
"characteristics:\n"
"WWNN 0x%016Lx, WWPN 0x%016Lx, "
"S_ID 0x%06x,\n"
"adapter version 0x%x, "
"LIC version 0x%x, "
"FC link speed %d Gb/s\n",
zfcp_get_busid_by_adapter(adapter),
(wwn_t) fc_host_node_name(shost),
(wwn_t) fc_host_port_name(shost),
fc_host_port_id(shost),
adapter->hydra_version,
adapter->fsf_lic_version,
fc_host_speed(shost));
if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
ZFCP_LOG_NORMAL("error: the adapter %s "
"only supports newer control block "
"versions in comparison to this device "
"driver (try updated device driver)\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req);
return -EIO;
}
if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
ZFCP_LOG_NORMAL("error: the adapter %s "
"only supports older control block "
"versions than this device driver uses"
"(consider a microcode upgrade)\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req);
return -EIO;
}
return 0;
}
/**
* function: zfcp_fsf_exchange_config_data_handler
*
* purpose: is called for finished Exchange Configuration Data command
*
* returns:
*/
static int
zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
{
struct fsf_qtcb_bottom_config *bottom;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_qtcb *qtcb = fsf_req->qtcb;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
return -EIO;
switch (qtcb->header.fsf_status) {
case FSF_GOOD:
if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
return -EIO;
switch (fc_host_port_type(adapter->scsi_host)) {
case FC_PORTTYPE_PTP:
ZFCP_LOG_NORMAL("Point-to-Point fibrechannel "
"configuration detected at adapter %s\n"
"Peer WWNN 0x%016llx, "
"peer WWPN 0x%016llx, "
"peer d_id 0x%06x\n",
zfcp_get_busid_by_adapter(adapter),
adapter->peer_wwnn,
adapter->peer_wwpn,
adapter->peer_d_id);
break;
case FC_PORTTYPE_NLPORT:
ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
"topology detected at adapter %s "
"unsupported, shutting down adapter\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req);
return -EIO;
case FC_PORTTYPE_NPORT:
if (fsf_req->erp_action)
ZFCP_LOG_NORMAL("Switched fabric fibrechannel "
"network detected at adapter "
"%s.\n",
zfcp_get_busid_by_adapter(adapter));
break;
default:
ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
"reported by the exchange "
"configuration command for "
"the adapter %s is not "
"of a type known to the zfcp "
"driver, shutting down adapter\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req);
return -EIO;
}
bottom = &qtcb->bottom.config;
if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
"allowed by the adapter %s "
"is lower than the minimum "
"required by the driver (%ld bytes).\n",
bottom->max_qtcb_size,
zfcp_get_busid_by_adapter(adapter),
sizeof(struct fsf_qtcb));
zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req);
return -EIO;
}
atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
&adapter->status);
break;
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
return -EIO;
atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
&adapter->status);
zfcp_fsf_link_down_info_eval(fsf_req, 42,
&qtcb->header.fsf_status_qual.link_down_info);
break;
default:
zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req);
return -EIO;
}
return 0;
}
/**
* zfcp_fsf_exchange_port_data - request information about local port
* @erp_action: ERP action for the adapter for which port data is requested
*/
int
zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
struct zfcp_adapter *adapter = erp_action->adapter;
unsigned long lock_flags;
int retval;
if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
ZFCP_LOG_INFO("error: exchange port data "
"command not supported by adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
return -EOPNOTSUPP;
}
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Out of resources. Could not create an "
"exchange port data request for "
"the adapter %s.\n",
zfcp_get_busid_by_adapter(adapter));
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
erp_action->fsf_req = fsf_req;
fsf_req->erp_action = erp_action;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(fsf_req);
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
if (retval) {
ZFCP_LOG_INFO("error: Could not send an exchange port data "
"command on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
}
else
ZFCP_LOG_DEBUG("exchange port data request initiated "
"(adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
return retval;
}
/**
* zfcp_fsf_exchange_port_data_sync - request information about local port
* and wait until information is ready
*/
int
zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
struct fsf_qtcb_bottom_port *data)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval;
if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) {
ZFCP_LOG_INFO("error: exchange port data "
"command not supported by adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
return -EOPNOTSUPP;
}
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
0, NULL, &lock_flags, &fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Out of resources. Could not create an "
"exchange port data request for "
"the adapter %s.\n",
zfcp_get_busid_by_adapter(adapter));
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
if (data)
fsf_req->data = (unsigned long) data;
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
if (retval)
ZFCP_LOG_INFO("error: Could not send an exchange port data "
"command on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
else
wait_event(fsf_req->completion_wq,
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
zfcp_fsf_req_free(fsf_req);
return retval;
}
/**
* zfcp_fsf_exchange_port_evaluate
* @fsf_req: fsf_req which belongs to xchg port data request
* @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
*/
static void
zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
{
struct zfcp_adapter *adapter;
struct fsf_qtcb_bottom_port *bottom;
struct Scsi_Host *shost;
adapter = fsf_req->adapter;
bottom = &fsf_req->qtcb->bottom.port;
shost = adapter->scsi_host;
if (fsf_req->data)
memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
sizeof(struct fsf_qtcb_bottom_port));
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;
}
/**
* zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
* @fsf_req: pointer to struct zfcp_fsf_req
*/
static void
zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter;
struct fsf_qtcb *qtcb;
adapter = fsf_req->adapter;
qtcb = fsf_req->qtcb;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (qtcb->header.fsf_status) {
case FSF_GOOD:
zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
break;
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
zfcp_fsf_link_down_info_eval(fsf_req, 43,
&qtcb->header.fsf_status_qual.link_down_info);
break;
}
}
/*
* function: zfcp_fsf_open_port
*
* purpose:
*
* returns: address of initiated FSF request
* NULL - request could not be initiated
*/
int
zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(erp_action->adapter,
FSF_QTCB_OPEN_PORT_WITH_DID,
ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
erp_action->adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create open port request "
"for port 0x%016Lx on adapter %s.\n",
erp_action->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
goto out;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
fsf_req->data = (unsigned long) erp_action->port;
fsf_req->erp_action = erp_action;
erp_action->fsf_req = fsf_req;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not send open port request for "
"port 0x%016Lx on adapter %s.\n",
erp_action->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
goto out;
}
ZFCP_LOG_DEBUG("open port request initiated "
"(adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn);
out:
write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
/*
* function: zfcp_fsf_open_port_handler
*
* purpose: is called for finished Open Port command
*
* returns:
*/
static int
zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = -EINVAL;
struct zfcp_port *port;
struct fsf_plogi *plogi;
struct fsf_qtcb_header *header;
u16 subtable, rule, counter;
port = (struct zfcp_port *) fsf_req->data;
header = &fsf_req->qtcb->header;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* don't change port status in our bookkeeping */
goto skip_fsfstatus;
}
/* evaluate FSF status in QTCB */
switch (header->fsf_status) {
case FSF_PORT_ALREADY_OPEN:
ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
"is already open.\n",
port->wwpn, zfcp_get_busid_by_port(port));
/*
* This is a bug, however operation should continue normally
* if it is simply ignored
*/
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
"on adapter %s\n",
port->wwpn, zfcp_get_busid_by_port(port));
for (counter = 0; counter < 2; counter++) {
subtable = header->fsf_status_qual.halfword[counter * 2];
rule = header->fsf_status_qual.halfword[counter * 2 + 1];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
zfcp_act_subtable_type[subtable], rule);
break;
}
}
zfcp_erp_port_access_denied(port, 57, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
"The remote port 0x%016Lx on adapter %s "
"could not be opened. Disabling it.\n",
port->wwpn, zfcp_get_busid_by_port(port));
zfcp_erp_port_failed(port, 31, fsf_req);
fsf_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:
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_NO_RETRY_POSSIBLE:
ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
"adapter %s could not be opened. "
"Disabling it.\n",
port->wwpn,
zfcp_get_busid_by_port(port));
zfcp_erp_port_failed(port, 32, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL
("bug: Wrong status qualifier 0x%x arrived.\n",
header->fsf_status_qual.word[0]);
break;
}
break;
case FSF_GOOD:
/* save port handle assigned by FSF */
port->handle = header->port_handle;
ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
"was opened, it's port handle is 0x%x\n",
port->wwpn, zfcp_get_busid_by_port(port),
port->handle);
/* mark port as open */
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);
retval = 0;
/* 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 *) fsf_req->qtcb->bottom.support.els;
if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
{
if (fsf_req->qtcb->bottom.support.els1_length <
sizeof (struct fsf_plogi)) {
ZFCP_LOG_INFO(
"warning: insufficient length of "
"PLOGI payload (%i)\n",
fsf_req->qtcb->bottom.support.els1_length);
/* skip sanity check and assume wwpn is ok */
} else {
if (plogi->serv_param.wwpn != port->wwpn) {
ZFCP_LOG_INFO("warning: d_id of port "
"0x%016Lx changed during "
"open\n", 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:
/* should never occure, subtype not set in zfcp_fsf_open_port */
ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
"op_subtype=0x%x)\n",
zfcp_get_busid_by_port(port),
fsf_req->qtcb->bottom.support.operation_subtype);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
header->fsf_status);
break;
}
skip_fsfstatus:
atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
return retval;
}
/*
* function: zfcp_fsf_close_port
*
* purpose: submit FSF command "close port"
*
* returns: address of initiated FSF request
* NULL - request could not be initiated
*/
int
zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(erp_action->adapter,
FSF_QTCB_CLOSE_PORT,
ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
erp_action->adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create a close port request "
"for port 0x%016Lx on adapter %s.\n",
erp_action->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
goto out;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
fsf_req->data = (unsigned long) erp_action->port;
fsf_req->erp_action = erp_action;
fsf_req->qtcb->header.port_handle = erp_action->port->handle;
fsf_req->erp_action = erp_action;
erp_action->fsf_req = fsf_req;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not send a close port request for "
"port 0x%016Lx on adapter %s.\n",
erp_action->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
goto out;
}
ZFCP_LOG_TRACE("close port request initiated "
"(adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn);
out:
write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
/*
* function: zfcp_fsf_close_port_handler
*
* purpose: is called for finished Close Port FSF command
*
* returns:
*/
static int
zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = -EINVAL;
struct zfcp_port *port;
port = (struct zfcp_port *) fsf_req->data;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* don't change port status in our bookkeeping */
goto skip_fsfstatus;
}
/* evaluate FSF status in QTCB */
switch (fsf_req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
"0x%016Lx on adapter %s invalid. This may happen "
"occasionally.\n", port->handle,
port->wwpn, zfcp_get_busid_by_port(port));
ZFCP_LOG_DEBUG("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
/* Note: FSF has actually closed the port in this case.
* The status code is just daft. Fingers crossed for a change
*/
retval = 0;
break;
case FSF_GOOD:
ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
"port handle 0x%x\n", port->wwpn,
zfcp_get_busid_by_port(port), port->handle);
zfcp_erp_modify_port_status(port, 33, fsf_req,
ZFCP_STATUS_COMMON_OPEN,
ZFCP_CLEAR);
retval = 0;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
fsf_req->qtcb->header.fsf_status);
break;
}
skip_fsfstatus:
atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
return retval;
}
/*
* function: zfcp_fsf_close_physical_port
*
* purpose: submit FSF command "close physical port"
*
* returns: address of initiated FSF request
* NULL - request could not be initiated
*/
int
zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(erp_action->adapter,
FSF_QTCB_CLOSE_PHYSICAL_PORT,
ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
erp_action->adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create close physical port "
"request (adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn);
goto out;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
/* mark port as being closed */
atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
&erp_action->port->status);
/* save a pointer to this port */
fsf_req->data = (unsigned long) erp_action->port;
fsf_req->qtcb->header.port_handle = erp_action->port->handle;
fsf_req->erp_action = erp_action;
erp_action->fsf_req = fsf_req;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not send close physical port "
"request (adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn);
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
goto out;
}
ZFCP_LOG_TRACE("close physical port request initiated "
"(adapter %s, port 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn);
out:
write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
/*
* function: zfcp_fsf_close_physical_port_handler
*
* purpose: is called for finished Close Physical Port FSF command
*
* returns:
*/
static int
zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = -EINVAL;
struct zfcp_port *port;
struct zfcp_unit *unit;
struct fsf_qtcb_header *header;
u16 subtable, rule, counter;
port = (struct zfcp_port *) fsf_req->data;
header = &fsf_req->qtcb->header;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* don't change port status in our bookkeeping */
goto skip_fsfstatus;
}
/* evaluate FSF status in QTCB */
switch (header->fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
"(adapter %s, port 0x%016Lx). "
"This may happen occasionally.\n",
port->handle,
zfcp_get_busid_by_port(port),
port->wwpn);
ZFCP_LOG_DEBUG("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_NORMAL("Access denied, cannot close "
"physical port 0x%016Lx on adapter %s\n",
port->wwpn, zfcp_get_busid_by_port(port));
for (counter = 0; counter < 2; counter++) {
subtable = header->fsf_status_qual.halfword[counter * 2];
rule = header->fsf_status_qual.halfword[counter * 2 + 1];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
zfcp_act_subtable_type[subtable], rule);
break;
}
}
zfcp_erp_port_access_denied(port, 58, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
"%s needs to be reopened but it was attempted "
"to close it physically.\n",
port->wwpn,
zfcp_get_busid_by_port(port));
zfcp_erp_port_boxed(port, 50, fsf_req);
fsf_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:
/* This will now be escalated by ERP */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL
("bug: Wrong status qualifier 0x%x arrived.\n",
header->fsf_status_qual.word[0]);
break;
}
break;
case FSF_GOOD:
ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
"physically closed, port handle 0x%x\n",
port->wwpn,
zfcp_get_busid_by_port(port), port->handle);
/* 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);
retval = 0;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
header->fsf_status);
break;
}
skip_fsfstatus:
atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
return retval;
}
/*
* function: zfcp_fsf_open_unit
*
* purpose:
*
* returns:
*
* assumptions: This routine does not check whether the associated
* remote port has already been opened. This should be
* done by calling routines. Otherwise some status
* may be presented by FSF
*/
int
zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(erp_action->adapter,
FSF_QTCB_OPEN_LUN,
ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
erp_action->adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create open unit request for "
"unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
erp_action->unit->fcp_lun,
erp_action->unit->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
goto out;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->qtcb->header.port_handle = erp_action->port->handle;
fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
fsf_req->qtcb->bottom.support.option =
FSF_OPEN_LUN_SUPPRESS_BOXING;
atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
fsf_req->data = (unsigned long) erp_action->unit;
fsf_req->erp_action = erp_action;
erp_action->fsf_req = fsf_req;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(erp_action->fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not send an open unit request "
"on the adapter %s, port 0x%016Lx for "
"unit 0x%016Lx\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn,
erp_action->unit->fcp_lun);
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
goto out;
}
ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
"port 0x%016Lx, unit 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn, erp_action->unit->fcp_lun);
out:
write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
/*
* function: zfcp_fsf_open_unit_handler
*
* purpose: is called for finished Open LUN command
*
* returns:
*/
static int
zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = -EINVAL;
struct zfcp_adapter *adapter;
struct zfcp_unit *unit;
struct fsf_qtcb_header *header;
struct fsf_qtcb_bottom_support *bottom;
struct fsf_queue_designator *queue_designator;
u16 subtable, rule, counter;
int exclusive, readwrite;
unit = (struct zfcp_unit *) fsf_req->data;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* don't change unit status in our bookkeeping */
goto skip_fsfstatus;
}
adapter = fsf_req->adapter;
header = &fsf_req->qtcb->header;
bottom = &fsf_req->qtcb->bottom.support;
queue_designator = &header->fsf_status_qual.fsf_queue_designator;
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_COMMON_ACCESS_BOXED |
ZFCP_STATUS_UNIT_SHARED |
ZFCP_STATUS_UNIT_READONLY,
&unit->status);
/* evaluate FSF status in QTCB */
switch (header->fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary port identifier 0x%x "
"for port 0x%016Lx on adapter %s invalid "
"This may happen occasionally\n",
unit->port->handle,
unit->port->wwpn, zfcp_get_busid_by_unit(unit));
ZFCP_LOG_DEBUG("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_ALREADY_OPEN:
ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
"remote port 0x%016Lx on adapter %s twice.\n",
unit->fcp_lun,
unit->port->wwpn, zfcp_get_busid_by_unit(unit));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
"remote port 0x%016Lx on adapter %s\n",
unit->fcp_lun, unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
for (counter = 0; counter < 2; counter++) {
subtable = header->fsf_status_qual.halfword[counter * 2];
rule = header->fsf_status_qual.halfword[counter * 2 + 1];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
zfcp_act_subtable_type[subtable], rule);
break;
}
}
zfcp_erp_unit_access_denied(unit, 59, fsf_req);
atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
"needs to be reopened\n",
unit->port->wwpn, zfcp_get_busid_by_unit(unit));
zfcp_erp_port_boxed(unit->port, 51, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_SHARING_VIOLATION:
if (header->fsf_status_qual.word[0] != 0) {
ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
"with WWPN 0x%Lx "
"connected to the adapter %s "
"is already in use in LPAR%d, CSS%d\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
queue_designator->hla,
queue_designator->cssid);
} else {
subtable = header->fsf_status_qual.halfword[4];
rule = header->fsf_status_qual.halfword[5];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
"remote port with WWPN 0x%Lx "
"connected to the adapter %s "
"is denied (%s rule %d)\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
zfcp_act_subtable_type[subtable],
rule);
break;
}
}
ZFCP_LOG_DEBUG("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_unit_access_denied(unit, 60, fsf_req);
atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
ZFCP_LOG_INFO("error: The adapter ran out of resources. "
"There is no handle (temporary port identifier) "
"available for unit 0x%016Lx on port 0x%016Lx "
"on adapter %s\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
zfcp_erp_unit_failed(unit, 34, fsf_req);
fsf_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:
/* Re-establish link to port */
zfcp_test_link(unit->port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL
("bug: Wrong status qualifier 0x%x arrived.\n",
header->fsf_status_qual.word[0]);
}
break;
case FSF_INVALID_COMMAND_OPTION:
ZFCP_LOG_NORMAL(
"Invalid option 0x%x has been specified "
"in QTCB bottom sent to the adapter %s\n",
bottom->option,
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EINVAL;
break;
case FSF_GOOD:
/* save LUN handle assigned by FSF */
unit->handle = header->lun_handle;
ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
"adapter %s opened, port handle 0x%x\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
unit->handle);
/* mark unit as open */
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);
ZFCP_LOG_NORMAL("read-only access for unit "
"(adapter %s, wwpn=0x%016Lx, "
"fcp_lun=0x%016Lx)\n",
zfcp_get_busid_by_unit(unit),
unit->port->wwpn,
unit->fcp_lun);
}
if (exclusive && !readwrite) {
ZFCP_LOG_NORMAL("exclusive access of read-only "
"unit not supported\n");
zfcp_erp_unit_failed(unit, 35, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req);
} else if (!exclusive && readwrite) {
ZFCP_LOG_NORMAL("shared access of read-write "
"unit not supported\n");
zfcp_erp_unit_failed(unit, 36, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req);
}
}
retval = 0;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
header->fsf_status);
break;
}
skip_fsfstatus:
atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
return retval;
}
/*
* function: zfcp_fsf_close_unit
*
* purpose:
*
* returns: address of fsf_req - request successfully initiated
* NULL -
*
* assumptions: This routine does not check whether the associated
* remote port/lun has already been opened. This should be
* done by calling routines. Otherwise some status
* may be presented by FSF
*/
int
zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(erp_action->adapter,
FSF_QTCB_CLOSE_LUN,
ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
erp_action->adapter->pool.fsf_req_erp,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create close unit request for "
"unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
erp_action->unit->fcp_lun,
erp_action->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
goto out;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->qtcb->header.port_handle = erp_action->port->handle;
fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
fsf_req->data = (unsigned long) erp_action->unit;
fsf_req->erp_action = erp_action;
erp_action->fsf_req = fsf_req;
zfcp_erp_start_timer(fsf_req);
retval = zfcp_fsf_req_send(erp_action->fsf_req);
if (retval) {
ZFCP_LOG_INFO("error: Could not send a close unit request for "
"unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
erp_action->unit->fcp_lun,
erp_action->port->wwpn,
zfcp_get_busid_by_adapter(erp_action->adapter));
zfcp_fsf_req_free(fsf_req);
erp_action->fsf_req = NULL;
goto out;
}
ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
"port 0x%016Lx, unit 0x%016Lx)\n",
zfcp_get_busid_by_adapter(erp_action->adapter),
erp_action->port->wwpn, erp_action->unit->fcp_lun);
out:
write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
lock_flags);
return retval;
}
/*
* function: zfcp_fsf_close_unit_handler
*
* purpose: is called for finished Close LUN FSF command
*
* returns:
*/
static int
zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = -EINVAL;
struct zfcp_unit *unit;
unit = (struct zfcp_unit *) fsf_req->data;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* don't change unit status in our bookkeeping */
goto skip_fsfstatus;
}
/* evaluate FSF status in QTCB */
switch (fsf_req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
"0x%016Lx on adapter %s invalid. This may "
"happen in rare circumstances\n",
unit->port->handle,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
ZFCP_LOG_DEBUG("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
"0x%016Lx on port 0x%016Lx on adapter %s is "
"invalid. This may happen occasionally.\n",
unit->handle,
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
ZFCP_LOG_DEBUG("Status qualifier data:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
"needs to be reopened\n",
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
zfcp_erp_port_boxed(unit->port, 52, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
/* re-establish link to port */
zfcp_test_link(unit->port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
ZFCP_LOG_NORMAL
("bug: Wrong status qualifier 0x%x arrived.\n",
fsf_req->qtcb->header.fsf_status_qual.word[0]);
break;
}
break;
case FSF_GOOD:
ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
"closed, port handle 0x%x\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
unit->handle);
/* mark unit as closed */
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
retval = 0;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
fsf_req->qtcb->header.fsf_status);
break;
}
skip_fsfstatus:
atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
return retval;
}
/**
* 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 *fsf_req = NULL;
struct fcp_cmnd_iu *fcp_cmnd_iu;
unsigned int sbtype;
unsigned long lock_flags;
int real_bytes = 0;
int retval = 0;
int mask;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
adapter->pool.fsf_req_scsi,
&lock_flags, &fsf_req);
if (unlikely(retval < 0)) {
ZFCP_LOG_DEBUG("error: Could not create FCP command request "
"for unit 0x%016Lx on port 0x%016Lx on "
"adapter %s\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_adapter(adapter));
goto failed_req_create;
}
if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
&unit->status))) {
retval = -EBUSY;
goto unit_blocked;
}
zfcp_unit_get(unit);
fsf_req->unit = unit;
/* associate FSF request with SCSI request (for look up on abort) */
scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
/* associate SCSI command with FSF request */
fsf_req->data = (unsigned long) scsi_cmnd;
/* set handles of unit and its parent port in QTCB */
fsf_req->qtcb->header.lun_handle = unit->handle;
fsf_req->qtcb->header.port_handle = unit->port->handle;
/* FSF does not define the structure of the FCP_CMND IU */
fcp_cmnd_iu = (struct fcp_cmnd_iu *)
&(fsf_req->qtcb->bottom.io.fcp_cmnd);
/*
* 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:
fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
/*
* FIXME(qdio):
* what is the correct type for commands
* without 'real' data buffers?
*/
sbtype = SBAL_FLAGS0_TYPE_READ;
break;
case DMA_FROM_DEVICE:
fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
sbtype = SBAL_FLAGS0_TYPE_READ;
fcp_cmnd_iu->rddata = 1;
break;
case DMA_TO_DEVICE:
fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
sbtype = SBAL_FLAGS0_TYPE_WRITE;
fcp_cmnd_iu->wddata = 1;
break;
case DMA_BIDIRECTIONAL:
default:
/*
* dummy, catch this condition earlier
* in zfcp_scsi_queuecommand
*/
goto failed_scsi_cmnd;
}
/* set FC service class in QTCB (3 per default) */
fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
/* set FCP_LUN in FCP_CMND IU in QTCB */
fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
/* set task attributes in FCP_CMND IU in QTCB */
if (likely((scsi_cmnd->device->simple_tags) ||
(atomic_test_mask(mask, &unit->status))))
fcp_cmnd_iu->task_attribute = SIMPLE_Q;
else
fcp_cmnd_iu->task_attribute = UNTAGGED;
/* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
fcp_cmnd_iu->add_fcp_cdb_length
= (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
"additional FCP_CDB length is 0x%x "
"(shifted right 2 bits)\n",
scsi_cmnd->cmd_len,
fcp_cmnd_iu->add_fcp_cdb_length);
}
/*
* copy SCSI CDB (including additional length, if any) to
* FCP_CDB in FCP_CMND IU in QTCB
*/
memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
/* FCP CMND IU length in QTCB */
fsf_req->qtcb->bottom.io.fcp_cmnd_length =
sizeof (struct fcp_cmnd_iu) +
fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
/* generate SBALEs from data buffer */
real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
if (unlikely(real_bytes < 0)) {
if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
ZFCP_LOG_DEBUG(
"Data did not fit into available buffer(s), "
"waiting for more...\n");
retval = -EIO;
} else {
ZFCP_LOG_NORMAL("error: No truncation implemented but "
"required. Shutting down unit "
"(adapter %s, port 0x%016Lx, "
"unit 0x%016Lx)\n",
zfcp_get_busid_by_unit(unit),
unit->port->wwpn,
unit->fcp_lun);
zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req);
retval = -EINVAL;
}
goto no_fit;
}
/* set length of FCP data length in FCP_CMND IU in QTCB */
zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
ZFCP_LOG_DEBUG("Sending SCSI command:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
if (use_timer)
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
if (unlikely(retval < 0)) {
ZFCP_LOG_INFO("error: Could not send FCP command request "
"on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->wwpn,
unit->fcp_lun);
goto send_failed;
}
ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
"port 0x%016Lx, unit 0x%016Lx)\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->wwpn,
unit->fcp_lun);
goto success;
send_failed:
no_fit:
failed_scsi_cmnd:
zfcp_unit_put(unit);
unit_blocked:
zfcp_fsf_req_free(fsf_req);
fsf_req = NULL;
scsi_cmnd->host_scribble = NULL;
success:
failed_req_create:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
return retval;
}
struct zfcp_fsf_req *
zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
struct zfcp_unit *unit,
u8 tm_flags, int req_flags)
{
struct zfcp_fsf_req *fsf_req = NULL;
int retval = 0;
struct fcp_cmnd_iu *fcp_cmnd_iu;
unsigned long lock_flags;
volatile struct qdio_buffer_element *sbale;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
adapter->pool.fsf_req_scsi,
&lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create FCP command (task "
"management) request for adapter %s, port "
" 0x%016Lx, unit 0x%016Lx.\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->wwpn, unit->fcp_lun);
goto out;
}
if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
&unit->status)))
goto unit_blocked;
/*
* Used to decide on proper handler in the return path,
* could be either zfcp_fsf_send_fcp_command_task_handler or
* zfcp_fsf_send_fcp_command_task_management_handler */
fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
/*
* hold a pointer to the unit being target of this
* task management request
*/
fsf_req->data = (unsigned long) unit;
/* set FSF related fields in QTCB */
fsf_req->qtcb->header.lun_handle = unit->handle;
fsf_req->qtcb->header.port_handle = unit->port->handle;
fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
fsf_req->qtcb->bottom.io.fcp_cmnd_length =
sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
/* set FCP related fields in FCP_CMND IU in QTCB */
fcp_cmnd_iu = (struct fcp_cmnd_iu *)
&(fsf_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(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
if (!retval)
goto out;
unit_blocked:
zfcp_fsf_req_free(fsf_req);
fsf_req = NULL;
out:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
return fsf_req;
}
static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
{
lat_rec->sum += lat;
if (lat_rec->min > lat)
lat_rec->min = lat;
if (lat_rec->max < lat)
lat_rec->max = lat;
}
static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req)
{
struct fsf_qual_latency_info *lat_inf;
struct latency_cont *lat;
struct zfcp_unit *unit;
unsigned long flags;
lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
unit = fsf_req->unit;
switch (fsf_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);
}
/*
* function: zfcp_fsf_send_fcp_command_handler
*
* purpose: is called for finished Send FCP Command
*
* returns:
*/
static int
zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = -EINVAL;
struct zfcp_unit *unit;
struct fsf_qtcb_header *header;
u16 subtable, rule, counter;
header = &fsf_req->qtcb->header;
if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
unit = (struct zfcp_unit *) fsf_req->data;
else
unit = fsf_req->unit;
if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
/* go directly to calls of special handlers */
goto skip_fsfstatus;
}
/* evaluate FSF status in QTCB */
switch (header->fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
"0x%016Lx on adapter %s invalid\n",
unit->port->handle,
unit->port->wwpn, zfcp_get_busid_by_unit(unit));
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_HANDLE_NOT_VALID:
ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
"0x%016Lx on port 0x%016Lx on adapter %s is "
"invalid. This may happen occasionally.\n",
unit->handle,
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
ZFCP_LOG_NORMAL("Status qualifier data:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_HANDLE_MISMATCH:
ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
"unexpectedly. (adapter %s, port 0x%016Lx, "
"unit 0x%016Lx)\n",
unit->port->handle,
zfcp_get_busid_by_unit(unit),
unit->port->wwpn,
unit->fcp_lun);
ZFCP_LOG_NORMAL("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
ZFCP_LOG_INFO("error: adapter %s does not support fc "
"class %d.\n",
zfcp_get_busid_by_unit(unit),
ZFCP_FC_SERVICE_CLASS_DEFAULT);
/* stop operation for this adapter */
zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 132, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_FCPLUN_NOT_VALID:
ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
"adapter %s does not have correct unit "
"handle 0x%x\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
unit->handle);
ZFCP_LOG_DEBUG("status qualifier:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &header->fsf_status_qual,
sizeof (union fsf_status_qual));
zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
"unit 0x%016Lx on port 0x%016Lx on "
"adapter %s\n", unit->fcp_lun, unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
for (counter = 0; counter < 2; counter++) {
subtable = header->fsf_status_qual.halfword[counter * 2];
rule = header->fsf_status_qual.halfword[counter * 2 + 1];
switch (subtable) {
case FSF_SQ_CFDC_SUBTABLE_OS:
case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
case FSF_SQ_CFDC_SUBTABLE_LUN:
ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
zfcp_act_subtable_type[subtable], rule);
break;
}
}
zfcp_erp_unit_access_denied(unit, 61, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_DIRECTION_INDICATOR_NOT_VALID:
ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
"0x%016Lx on port 0x%016Lx on adapter %s "
"(debug info %d)\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
fsf_req->qtcb->bottom.io.data_direction);
/* stop operation for this adapter */
zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_CMND_LENGTH_NOT_VALID:
ZFCP_LOG_NORMAL
("bug: An invalid control-data-block length field "
"was found in a command for unit 0x%016Lx on port "
"0x%016Lx on adapter %s " "(debug info %d)\n",
unit->fcp_lun, unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
fsf_req->qtcb->bottom.io.fcp_cmnd_length);
/* stop operation for this adapter */
zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
"needs to be reopened\n",
unit->port->wwpn, zfcp_get_busid_by_unit(unit));
zfcp_erp_port_boxed(unit->port, 53, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_BOXED:
ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
"wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
zfcp_get_busid_by_unit(unit),
unit->port->wwpn, unit->fcp_lun);
zfcp_erp_unit_boxed(unit, 54, fsf_req);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
/* re-establish link to port */
zfcp_test_link(unit->port);
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* FIXME(hw) need proper specs for proper action */
/* let scsi stack deal with retries and escalation */
break;
default:
ZFCP_LOG_NORMAL
("Unknown status qualifier 0x%x arrived.\n",
header->fsf_status_qual.word[0]);
break;
}
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_GOOD:
break;
case FSF_FCP_RSP_AVAILABLE:
break;
}
skip_fsfstatus:
if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
retval =
zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
} else {
retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
fsf_req->unit = NULL;
zfcp_unit_put(unit);
}
return retval;
}
/*
* function: zfcp_fsf_send_fcp_command_task_handler
*
* purpose: evaluates FCP_RSP IU
*
* returns:
*/
static int
zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
struct scsi_cmnd *scpnt;
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
&(fsf_req->qtcb->bottom.io.fcp_rsp);
struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
&(fsf_req->qtcb->bottom.io.fcp_cmnd);
u32 sns_len;
char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
unsigned long flags;
struct zfcp_unit *unit = fsf_req->unit;
read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
scpnt = (struct scsi_cmnd *) fsf_req->data;
if (unlikely(!scpnt)) {
ZFCP_LOG_DEBUG
("Command with fsf_req %p is not associated to "
"a scsi command anymore. Aborted?\n", fsf_req);
goto out;
}
if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
/* FIXME: (design) mid-layer should handle DID_ABORT like
* DID_SOFT_ERROR by retrying the request for devices
* that allow retries.
*/
ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
set_host_byte(&scpnt->result, DID_SOFT_ERROR);
set_driver_byte(&scpnt->result, SUGGEST_RETRY);
goto skip_fsfstatus;
}
if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
set_host_byte(&scpnt->result, DID_ERROR);
goto skip_fsfstatus;
}
/* set message byte of result in SCSI command */
scpnt->result |= COMMAND_COMPLETE << 8;
/*
* copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
* of result in SCSI command
*/
scpnt->result |= fcp_rsp_iu->scsi_status;
if (unlikely(fcp_rsp_iu->scsi_status)) {
/* DEBUG */
ZFCP_LOG_DEBUG("status for SCSI Command:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
scpnt->cmnd, scpnt->cmd_len);
ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
fcp_rsp_iu->scsi_status);
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
fcp_rsp_iu->fcp_sns_len);
}
if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
zfcp_fsf_req_latency(fsf_req);
/* check FCP_RSP_INFO */
if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
ZFCP_LOG_DEBUG("rsp_len is valid\n");
switch (fcp_rsp_info[3]) {
case RSP_CODE_GOOD:
/* ok, continue */
ZFCP_LOG_TRACE("no failure or Task Management "
"Function complete\n");
set_host_byte(&scpnt->result, DID_OK);
break;
case RSP_CODE_LENGTH_MISMATCH:
/* hardware bug */
ZFCP_LOG_NORMAL("bug: FCP response code indictates "
"that the fibrechannel protocol data "
"length differs from the burst length. "
"The problem occured on unit 0x%016Lx "
"on port 0x%016Lx on adapter %s",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
/* dump SCSI CDB as prepared by zfcp */
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->
bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
set_host_byte(&scpnt->result, DID_ERROR);
goto skip_fsfstatus;
case RSP_CODE_FIELD_INVALID:
/* driver or hardware bug */
ZFCP_LOG_NORMAL("bug: FCP response code indictates "
"that the fibrechannel protocol data "
"fields were incorrectly set up. "
"The problem occured on the unit "
"0x%016Lx on port 0x%016Lx on "
"adapter %s",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
/* dump SCSI CDB as prepared by zfcp */
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->
bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
set_host_byte(&scpnt->result, DID_ERROR);
goto skip_fsfstatus;
case RSP_CODE_RO_MISMATCH:
/* hardware bug */
ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
"that conflicting values for the "
"fibrechannel payload offset from the "
"header were found. "
"The problem occured on unit 0x%016Lx "
"on port 0x%016Lx on adapter %s.\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
/* dump SCSI CDB as prepared by zfcp */
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->
bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
set_host_byte(&scpnt->result, DID_ERROR);
goto skip_fsfstatus;
default:
ZFCP_LOG_NORMAL("bug: An invalid FCP response "
"code was detected for a command. "
"The problem occured on the unit "
"0x%016Lx on port 0x%016Lx on "
"adapter %s (debug info 0x%x)\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
fcp_rsp_info[3]);
/* dump SCSI CDB as prepared by zfcp */
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
(char *) &fsf_req->qtcb->
bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
set_host_byte(&scpnt->result, DID_ERROR);
goto skip_fsfstatus;
}
}
/* check for sense data */
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;
ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
sns_len);
sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
SCSI_SENSE_BUFFERSIZE);
sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
scpnt->result);
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
scpnt->cmnd, scpnt->cmd_len);
ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
fcp_rsp_iu->fcp_sns_len);
memcpy(scpnt->sense_buffer,
zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
(void *)scpnt->sense_buffer, sns_len);
}
/* check for overrun */
if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
ZFCP_LOG_INFO("A data overrun was detected for a command. "
"unit 0x%016Lx, port 0x%016Lx, adapter %s. "
"The response data length is "
"%d, the original length was %d.\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
fcp_rsp_iu->fcp_resid,
(int) zfcp_get_fcp_dl(fcp_cmnd_iu));
}
/* check for underrun */
if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
ZFCP_LOG_INFO("A data underrun was detected for a command. "
"unit 0x%016Lx, port 0x%016Lx, adapter %s. "
"The response data length is "
"%d, the original length was %d.\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
fcp_rsp_iu->fcp_resid,
(int) zfcp_get_fcp_dl(fcp_cmnd_iu));
scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
scpnt->underflow)
set_host_byte(&scpnt->result, DID_ERROR);
}
skip_fsfstatus:
ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
if (scpnt->result != 0)
zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
else if (scpnt->retries > 0)
zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
else
zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
/* cleanup pointer (need this especially for abort) */
scpnt->host_scribble = NULL;
/* always call back */
(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!
*/
out:
read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
return retval;
}
/*
* function: zfcp_fsf_send_fcp_command_task_management_handler
*
* purpose: evaluates FCP_RSP IU
*
* returns:
*/
static int
zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
{
int retval = 0;
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
&(fsf_req->qtcb->bottom.io.fcp_rsp);
char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
struct zfcp_unit *unit = (struct zfcp_unit *) fsf_req->data;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
goto skip_fsfstatus;
}
/* check FCP_RSP_INFO */
switch (fcp_rsp_info[3]) {
case RSP_CODE_GOOD:
/* ok, continue */
ZFCP_LOG_DEBUG("no failure or Task Management "
"Function complete\n");
break;
case RSP_CODE_TASKMAN_UNSUPP:
ZFCP_LOG_NORMAL("bug: A reuested task management function "
"is not supported on the target device "
"unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
break;
case RSP_CODE_TASKMAN_FAILED:
ZFCP_LOG_NORMAL("bug: A reuested task management function "
"failed to complete successfully. "
"unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
break;
default:
ZFCP_LOG_NORMAL("bug: An invalid FCP response "
"code was detected for a command. "
"unit 0x%016Lx, port 0x%016Lx, adapter %s "
"(debug info 0x%x)\n",
unit->fcp_lun,
unit->port->wwpn,
zfcp_get_busid_by_unit(unit),
fcp_rsp_info[3]);
fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
}
skip_fsfstatus:
return retval;
}
/*
* function: zfcp_fsf_control_file
*
* purpose: Initiator of the control file upload/download FSF requests
*
* returns: 0 - FSF request is successfuly created and queued
* -EOPNOTSUPP - The FCP adapter does not have Control File support
* -EINVAL - Invalid direction specified
* -ENOMEM - Insufficient memory
* -EPERM - Cannot create FSF request or place it in QDIO queue
*/
int
zfcp_fsf_control_file(struct zfcp_adapter *adapter,
struct zfcp_fsf_req **fsf_req_ptr,
u32 fsf_command,
u32 option,
struct zfcp_sg_list *sg_list)
{
struct zfcp_fsf_req *fsf_req;
struct fsf_qtcb_bottom_support *bottom;
volatile struct qdio_buffer_element *sbale;
unsigned long lock_flags;
int req_flags = 0;
int direction;
int retval = 0;
if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
retval = -EOPNOTSUPP;
goto out;
}
switch (fsf_command) {
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
direction = SBAL_FLAGS0_TYPE_WRITE;
if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
(option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
req_flags = ZFCP_WAIT_FOR_SBAL;
break;
case FSF_QTCB_UPLOAD_CONTROL_FILE:
direction = SBAL_FLAGS0_TYPE_READ;
break;
default:
ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
retval = -EINVAL;
goto out;
}
retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
NULL, &lock_flags, &fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create FSF request for the "
"adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
retval = -EPERM;
goto unlock_queue_lock;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
sbale[0].flags |= direction;
bottom = &fsf_req->qtcb->bottom.support;
bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
bottom->option = option;
if (sg_list->count > 0) {
int bytes;
bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
sg_list->sg, sg_list->count,
ZFCP_MAX_SBALS_PER_REQ);
if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
ZFCP_LOG_INFO(
"error: Could not create sufficient number of "
"SBALS for an FSF request to the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
retval = -ENOMEM;
goto free_fsf_req;
}
} else
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
if (retval < 0) {
ZFCP_LOG_INFO("initiation of cfdc up/download failed"
"(adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
retval = -EPERM;
goto free_fsf_req;
}
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
"adapter %s\n",
fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
"download" : "upload",
zfcp_get_busid_by_adapter(adapter));
wait_event(fsf_req->completion_wq,
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
*fsf_req_ptr = fsf_req;
goto out;
free_fsf_req:
zfcp_fsf_req_free(fsf_req);
unlock_queue_lock:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
out:
return retval;
}
/*
* function: zfcp_fsf_control_file_handler
*
* purpose: Handler of the control file upload/download FSF requests
*
* returns: 0 - FSF request successfuly processed
* -EAGAIN - Operation has to be repeated because of a temporary problem
* -EACCES - There is no permission to execute an operation
* -EPERM - The control file is not in a right format
* -EIO - There is a problem with the FCP adapter
* -EINVAL - Invalid operation
* -EFAULT - User space memory I/O operation fault
*/
static int
zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
int retval = 0;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
retval = -EINVAL;
goto skip_fsfstatus;
}
switch (header->fsf_status) {
case FSF_GOOD:
ZFCP_LOG_NORMAL(
"The FSF request has been successfully completed "
"on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_CFDC_HARDENED_ON_SE:
ZFCP_LOG_NORMAL(
"CFDC on the adapter %s has being "
"hardened on primary and secondary SE\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
ZFCP_LOG_NORMAL(
"CFDC of the adapter %s could not "
"be saved on the SE\n",
zfcp_get_busid_by_adapter(adapter));
break;
case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
ZFCP_LOG_NORMAL(
"CFDC of the adapter %s could not "
"be copied to the secondary SE\n",
zfcp_get_busid_by_adapter(adapter));
break;
default:
ZFCP_LOG_NORMAL(
"CFDC could not be hardened "
"on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
}
}
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EAGAIN;
break;
case FSF_AUTHORIZATION_FAILURE:
ZFCP_LOG_NORMAL(
"Adapter %s does not accept privileged commands\n",
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EACCES;
break;
case FSF_CFDC_ERROR_DETECTED:
ZFCP_LOG_NORMAL(
"Error at position %d in the CFDC, "
"CFDC is discarded by the adapter %s\n",
header->fsf_status_qual.word[0],
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EPERM;
break;
case FSF_CONTROL_FILE_UPDATE_ERROR:
ZFCP_LOG_NORMAL(
"Adapter %s cannot harden the control file, "
"file is discarded\n",
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EIO;
break;
case FSF_CONTROL_FILE_TOO_LARGE:
ZFCP_LOG_NORMAL(
"Control file is too large, file is discarded "
"by the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EIO;
break;
case FSF_ACCESS_CONFLICT_DETECTED:
if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
ZFCP_LOG_NORMAL(
"CFDC has been discarded by the adapter %s, "
"because activation would impact "
"%d active connection(s)\n",
zfcp_get_busid_by_adapter(adapter),
header->fsf_status_qual.word[0]);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EIO;
break;
case FSF_CONFLICTS_OVERRULED:
if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
ZFCP_LOG_NORMAL(
"CFDC has been activated on the adapter %s, "
"but activation has impacted "
"%d active connection(s)\n",
zfcp_get_busid_by_adapter(adapter),
header->fsf_status_qual.word[0]);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EIO;
break;
case FSF_UNKNOWN_OP_SUBTYPE:
ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
"op_subtype=0x%x)\n",
zfcp_get_busid_by_adapter(adapter),
bottom->operation_subtype);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EINVAL;
break;
case FSF_INVALID_COMMAND_OPTION:
ZFCP_LOG_NORMAL(
"Invalid option 0x%x has been specified "
"in QTCB bottom sent to the adapter %s\n",
bottom->option,
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EINVAL;
break;
default:
ZFCP_LOG_NORMAL(
"bug: An unknown/unexpected FSF status 0x%08x "
"was presented on the adapter %s\n",
header->fsf_status,
zfcp_get_busid_by_adapter(adapter));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EINVAL;
break;
}
skip_fsfstatus:
return retval;
}
static inline int
zfcp_fsf_req_sbal_check(unsigned long *flags,
struct zfcp_qdio_queue *queue, int needed)
{
write_lock_irqsave(&queue->queue_lock, *flags);
if (likely(atomic_read(&queue->free_count) >= needed))
return 1;
write_unlock_irqrestore(&queue->queue_lock, *flags);
return 0;
}
/*
* set qtcb pointer in fsf_req and initialize QTCB
*/
static void
zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
{
if (likely(fsf_req->qtcb != NULL)) {
fsf_req->qtcb->prefix.req_seq_no =
fsf_req->adapter->fsf_req_seq_no;
fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
fsf_req->qtcb->prefix.qtcb_type =
fsf_qtcb_type[fsf_req->fsf_command];
fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
fsf_req->qtcb->header.req_handle = fsf_req->req_id;
fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
}
}
/**
* zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
* @adapter: adapter for which request queue is examined
* @req_flags: flags indicating whether to wait for needed SBAL or not
* @lock_flags: lock_flags if queue_lock is taken
* Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
* Locks: lock adapter->request_queue->queue_lock on success
*/
static int
zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
unsigned long *lock_flags)
{
long ret;
struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
ret = wait_event_interruptible_timeout(adapter->request_wq,
zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
ZFCP_SBAL_TIMEOUT);
if (ret < 0)
return ret;
if (!ret)
return -EIO;
} else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
return -EIO;
return 0;
}
/*
* function: zfcp_fsf_req_create
*
* purpose: create an FSF request at the specified adapter and
* setup common fields
*
* returns: -ENOMEM if there was insufficient memory for a request
* -EIO if no qdio buffers could be allocate to the request
* -EINVAL/-EPERM on bug conditions in req_dequeue
* 0 in success
*
* note: The created request is returned by reference.
*
* locks: lock of concerned request queue must not be held,
* but is held on completion (write, irqsave)
*/
int
zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
mempool_t *pool, unsigned long *lock_flags,
struct zfcp_fsf_req **fsf_req_p)
{
volatile struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *fsf_req = NULL;
int ret = 0;
struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
/* allocate new FSF request */
fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
if (unlikely(NULL == fsf_req)) {
ZFCP_LOG_DEBUG("error: Could not put an FSF request into "
"the outbound (send) queue.\n");
ret = -ENOMEM;
goto failed_fsf_req;
}
fsf_req->adapter = adapter;
fsf_req->fsf_command = fsf_cmd;
INIT_LIST_HEAD(&fsf_req->list);
init_timer(&fsf_req->timer);
/* initialize waitqueue which may be used to wait on
this request completion */
init_waitqueue_head(&fsf_req->completion_wq);
ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
if (ret < 0)
goto failed_sbals;
/* this is serialized (we are holding req_queue-lock of adapter) */
if (adapter->req_no == 0)
adapter->req_no++;
fsf_req->req_id = adapter->req_no++;
zfcp_fsf_req_qtcb_init(fsf_req);
/*
* We hold queue_lock here. Check if QDIOUP is set and let request fail
* if it is not set (see also *_open_qdio and *_close_qdio).
*/
if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
ret = -EIO;
goto failed_sbals;
}
if (fsf_req->qtcb) {
fsf_req->seq_no = adapter->fsf_req_seq_no;
fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
}
fsf_req->sbal_number = 1;
fsf_req->sbal_first = req_queue->free_index;
fsf_req->sbal_last = req_queue->free_index;
fsf_req->sbale_curr = 1;
if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0);
/* setup common SBALE fields */
sbale[0].addr = (void *) fsf_req->req_id;
sbale[0].flags |= SBAL_FLAGS0_COMMAND;
if (likely(fsf_req->qtcb != NULL)) {
sbale[1].addr = (void *) fsf_req->qtcb;
sbale[1].length = sizeof(struct fsf_qtcb);
}
ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
fsf_req->sbal_number, fsf_req->sbal_first);
goto success;
failed_sbals:
/* dequeue new FSF request previously enqueued */
zfcp_fsf_req_free(fsf_req);
fsf_req = NULL;
failed_fsf_req:
write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
success:
*fsf_req_p = fsf_req;
return ret;
}
/*
* function: zfcp_fsf_req_send
*
* purpose: start transfer of FSF request via QDIO
*
* returns: 0 - request transfer succesfully started
* !0 - start of request transfer failed
*/
static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter;
struct zfcp_qdio_queue *req_queue;
volatile struct qdio_buffer_element *sbale;
int inc_seq_no;
int new_distance_from_int;
int retval = 0;
adapter = fsf_req->adapter;
req_queue = &adapter->request_queue,
/* FIXME(debug): remove it later */
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
sbale[1].length);
/* put allocated FSF request into hash table */
spin_lock(&adapter->req_list_lock);
zfcp_reqlist_add(adapter, fsf_req);
spin_unlock(&adapter->req_list_lock);
inc_seq_no = (fsf_req->qtcb != NULL);
ZFCP_LOG_TRACE("request queue of adapter %s: "
"next free SBAL is %i, %i free SBALs\n",
zfcp_get_busid_by_adapter(adapter),
req_queue->free_index,
atomic_read(&req_queue->free_count));
ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
"index_in_queue=%i, count=%i, buffers=%p\n",
zfcp_get_busid_by_adapter(adapter),
QDIO_FLAG_SYNC_OUTPUT,
0, fsf_req->sbal_first, fsf_req->sbal_number,
&req_queue->buffer[fsf_req->sbal_first]);
/*
* adjust the number of free SBALs in request queue as well as
* position of first one
*/
atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
req_queue->free_index += fsf_req->sbal_number; /* increase */
req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */
new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
fsf_req->issued = get_clock();
retval = do_QDIO(adapter->ccw_device,
QDIO_FLAG_SYNC_OUTPUT,
0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
if (unlikely(retval)) {
/* Queues are down..... */
retval = -EIO;
del_timer(&fsf_req->timer);
spin_lock(&adapter->req_list_lock);
zfcp_reqlist_remove(adapter, fsf_req);
spin_unlock(&adapter->req_list_lock);
/* undo changes in request queue made for this request */
zfcp_qdio_zero_sbals(req_queue->buffer,
fsf_req->sbal_first, fsf_req->sbal_number);
atomic_add(fsf_req->sbal_number, &req_queue->free_count);
req_queue->free_index -= fsf_req->sbal_number;
req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req);
} else {
req_queue->distance_from_int = new_distance_from_int;
/*
* increase FSF sequence counter -
* this must only be done for request successfully enqueued to
* QDIO this rejected requests may be cleaned up by calling
* routines resulting in missing sequence counter values
* otherwise,
*/
/* Don't increase for unsolicited status */
if (inc_seq_no)
adapter->fsf_req_seq_no++;
/* count FSF requests pending */
atomic_inc(&adapter->reqs_active);
}
return retval;
}
#undef ZFCP_LOG_AREA
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