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kernel-fxtec-pro1x/drivers/s390/scsi/zfcp_fsf.c
6f71d9bc02 zfcp: add point-2-point support 
From: Andreas Herrmann <aherrman@de.ibm.com>

This patch mainly introduces support for point-2-point
topology.

From: Heiko Carstens <heiko.carstens@de.ibm.com>
From: Maxim Shchetynin <maxim@de.ibm.com>
From: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-18 12:34:41 -05:00

5109 lines
162 KiB
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/*
*
* linux/drivers/s390/scsi/zfcp_fsf.c
*
* FCP adapter driver for IBM eServer zSeries
*
* (C) Copyright IBM Corp. 2002, 2004
*
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Raimund Schroeder <raimund.schroeder@de.ibm.com>
* Aron Zeh
* Wolfgang Taphorn
* Stefan Bader <stefan.bader@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
* Andreas Herrmann <aherrman@de.ibm.com>
* Volker Sameske <sameske@de.ibm.com>
*
* 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.
*/
#define ZFCP_FSF_C_REVISION "$Revision: 1.92 $"
#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 *, struct timer_list *);
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 int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
static void zfcp_fsf_req_free(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_pool_element);
if (likely(pool != NULL))
ptr = mempool_alloc(pool, GFP_ATOMIC);
else
ptr = kmalloc(size, GFP_ATOMIC);
if (unlikely(NULL == 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_pool_element *) ptr)->fsf_req;
fsf_req->qtcb =
&((struct zfcp_fsf_req_pool_element *) 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
*/
static void
zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
{
if (likely(fsf_req->pool != NULL))
mempool_free(fsf_req, fsf_req->pool);
else
kfree(fsf_req);
}
/*
* function:
*
* purpose:
*
* returns:
*
* note: qdio queues shall be down (no ongoing inbound processing)
*/
int
zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
{
int retval = 0;
struct zfcp_fsf_req *fsf_req, *tmp;
list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head,
list)
zfcp_fsf_req_dismiss(fsf_req);
/* wait_event_timeout? */
while (!list_empty(&adapter->fsf_req_list_head)) {
ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n",
zfcp_get_busid_by_adapter(adapter));
/* wait for woken intiators to clean up their requests */
msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT));
}
/* consistency check */
if (atomic_read(&adapter->fsf_reqs_active)) {
ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending "
"on adapter %s after cleanup.\n",
atomic_read(&adapter->fsf_reqs_active),
zfcp_get_busid_by_adapter(adapter));
atomic_set(&adapter->fsf_reqs_active, 0);
}
return retval;
}
/*
* function:
*
* purpose:
*
* returns:
*/
static void
zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
{
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;
struct zfcp_adapter *adapter = fsf_req->adapter;
/* do some statistics */
atomic_dec(&adapter->fsf_reqs_active);
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
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_cleanup(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;
ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb);
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. */
zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0);
goto skip_protstatus;
}
/* log additional information provided by FSF (if any) */
if (unlikely(fsf_req->qtcb->header.log_length)) {
/* do not trust them ;-) */
if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
ZFCP_LOG_NORMAL
("bug: ULP (FSF logging) log data starts "
"beyond end of packet header. Ignored. "
"(start=%i, size=%li)\n",
fsf_req->qtcb->header.log_start,
sizeof(struct fsf_qtcb));
goto forget_log;
}
if ((size_t) (fsf_req->qtcb->header.log_start +
fsf_req->qtcb->header.log_length)
> sizeof(struct fsf_qtcb)) {
ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
"beyond end of packet header. Ignored. "
"(start=%i, length=%i, size=%li)\n",
fsf_req->qtcb->header.log_start,
fsf_req->qtcb->header.log_length,
sizeof(struct fsf_qtcb));
goto forget_log;
}
ZFCP_LOG_TRACE("ULP log data: \n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
(char *) fsf_req->qtcb +
fsf_req->qtcb->header.log_start,
fsf_req->qtcb->header.log_length);
}
forget_log:
/* evaluate FSF Protocol Status */
switch (fsf_req->qtcb->prefix.prot_status) {
case FSF_PROT_GOOD:
ZFCP_LOG_TRACE("FSF_PROT_GOOD\n");
break;
case FSF_PROT_FSF_STATUS_PRESENTED:
ZFCP_LOG_TRACE("FSF_PROT_FSF_STATUS_PRESENTED\n");
break;
case FSF_PROT_QTCB_VERSION_ERROR:
ZFCP_LOG_FLAGS(0, "FSF_PROT_QTCB_VERSION_ERROR\n");
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),
fsf_req->qtcb->prefix.prot_status_qual.
version_error.fsf_version, ZFCP_QTCB_VERSION);
/* stop operation for this adapter */
debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err");
zfcp_erp_adapter_shutdown(adapter, 0);
zfcp_cmd_dbf_event_fsf("qverserr", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_SEQ_NUMB_ERROR:
ZFCP_LOG_FLAGS(0, "FSF_PROT_SEQ_NUMB_ERROR\n");
ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
"driver (0x%x) and adapter %s (0x%x). "
"Restarting all operations on this adapter.\n",
fsf_req->qtcb->prefix.req_seq_no,
zfcp_get_busid_by_adapter(adapter),
fsf_req->qtcb->prefix.prot_status_qual.
sequence_error.exp_req_seq_no);
debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err");
/* restart operation on this adapter */
zfcp_erp_adapter_reopen(adapter, 0);
zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_UNSUPP_QTCB_TYPE:
ZFCP_LOG_FLAGS(0, "FSF_PROT_UNSUP_QTCB_TYPE\n");
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));
debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb");
zfcp_erp_adapter_shutdown(adapter, 0);
zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_HOST_CONNECTION_INITIALIZING:
ZFCP_LOG_FLAGS(1, "FSF_PROT_HOST_CONNECTION_INITIALIZING\n");
zfcp_cmd_dbf_event_fsf("hconinit", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
&(adapter->status));
debug_text_event(adapter->erp_dbf, 3, "prot_con_init");
break;
case FSF_PROT_DUPLICATE_REQUEST_ID:
ZFCP_LOG_FLAGS(0, "FSF_PROT_DUPLICATE_REQUEST_IDS\n");
if (fsf_req->qtcb) {
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 *)
(&fsf_req->qtcb->bottom.support.
req_handle),
zfcp_get_busid_by_adapter(adapter));
} else {
ZFCP_LOG_NORMAL("bug: The request identifier %p "
"to the adapter %s is ambiguous. "
"Stopping all operations on this "
"adapter. "
"(bug: got this for an unsolicited "
"status read request)\n",
fsf_req,
zfcp_get_busid_by_adapter(adapter));
}
debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id");
zfcp_erp_adapter_shutdown(adapter, 0);
zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_LINK_DOWN:
ZFCP_LOG_FLAGS(1, "FSF_PROT_LINK_DOWN\n");
/*
* 'test and set' is not atomic here -
* it's ok as long as calls to our response queue handler
* (and thus execution of this code here) are serialized
* by the qdio module
*/
if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
&adapter->status)) {
switch (fsf_req->qtcb->prefix.prot_status_qual.
locallink_error.code) {
case FSF_PSQ_LINK_NOLIGHT:
ZFCP_LOG_INFO("The local link to adapter %s "
"is down (no light detected).\n",
zfcp_get_busid_by_adapter(
adapter));
break;
case FSF_PSQ_LINK_WRAPPLUG:
ZFCP_LOG_INFO("The local link to adapter %s "
"is down (wrap plug detected).\n",
zfcp_get_busid_by_adapter(
adapter));
break;
case FSF_PSQ_LINK_NOFCP:
ZFCP_LOG_INFO("The local link to adapter %s "
"is down (adjacent node on "
"link does not support FCP).\n",
zfcp_get_busid_by_adapter(
adapter));
break;
default:
ZFCP_LOG_INFO("The local link to adapter %s "
"is down "
"(warning: unknown reason "
"code).\n",
zfcp_get_busid_by_adapter(
adapter));
break;
}
/*
* Due to the 'erp failed' flag the adapter won't
* be recovered but will be just set to 'blocked'
* state. All subordinary devices will have state
* 'blocked' and 'erp failed', too.
* Thus the adapter is still able to provide
* 'link up' status without being flooded with
* requests.
* (note: even 'close port' is not permitted)
*/
ZFCP_LOG_INFO("Stopping all operations for adapter "
"%s.\n",
zfcp_get_busid_by_adapter(adapter));
atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
ZFCP_STATUS_COMMON_ERP_FAILED,
&adapter->status);
zfcp_erp_adapter_reopen(adapter, 0);
debug_text_event(adapter->erp_dbf, 1, "prot_link_down");
}
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_REEST_QUEUE:
ZFCP_LOG_FLAGS(1, "FSF_PROT_REEST_QUEUE\n");
debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue");
ZFCP_LOG_INFO("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,
ZFCP_STATUS_COMMON_RUNNING,
ZFCP_SET);
zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
| ZFCP_STATUS_COMMON_ERP_FAILED);
zfcp_cmd_dbf_event_fsf("reestque", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PROT_ERROR_STATE:
ZFCP_LOG_FLAGS(0, "FSF_PROT_ERROR_STATE\n");
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));
debug_text_event(adapter->erp_dbf, 0, "prot_err_sta");
/* restart operation on this adapter */
zfcp_erp_adapter_reopen(adapter, 0);
zfcp_cmd_dbf_event_fsf("proterrs", fsf_req,
&fsf_req->qtcb->prefix.prot_status_qual,
sizeof (union fsf_prot_status_qual));
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),
fsf_req->qtcb->prefix.prot_status);
debug_text_event(adapter->erp_dbf, 0, "prot_inval:");
debug_exception(adapter->erp_dbf, 0,
&fsf_req->qtcb->prefix.prot_status,
sizeof (u32));
zfcp_erp_adapter_shutdown(adapter, 0);
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_FLAGS(0, "FSF_UNKNOWN_COMMAND\n");
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);
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"fsf_s_unknown");
zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
zfcp_cmd_dbf_event_fsf("unknownc", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_FCP_RSP_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
"SCSI stack.\n");
debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp");
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus");
zfcp_fsf_fsfstatus_qual_eval(fsf_req);
break;
default:
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:
ZFCP_LOG_FLAGS(2, "FSF_SQ_FCP_RSP_AVAILABLE\n");
debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp");
break;
case FSF_SQ_RETRY_IF_POSSIBLE:
ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
/* The SCSI-stack may now issue retries or escalate */
debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry");
zfcp_cmd_dbf_event_fsf("sqretry", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_COMMAND_ABORTED:
ZFCP_LOG_FLAGS(2, "FSF_SQ_COMMAND_ABORTED\n");
/* Carry the aborted state on to upper layer */
debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort");
zfcp_cmd_dbf_event_fsf("sqabort", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_NO_RECOM:
ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RECOM\n");
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_no_rec");
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);
zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_PROGRAMMING_ERROR:
ZFCP_LOG_FLAGS(0, "FSF_SQ_ULP_PROGRAMMING_ERROR\n");
ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
"(adapter %s)\n",
zfcp_get_busid_by_adapter(fsf_req->adapter));
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_ulp_err");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&fsf_req->qtcb->header.fsf_status_qual.word[0],
sizeof (u32));
zfcp_cmd_dbf_event_fsf("squndef", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
return retval;
}
/*
* 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;
if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb);
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
(char *) fsf_req->qtcb, sizeof(struct fsf_qtcb));
}
switch (fsf_req->fsf_command) {
case FSF_QTCB_FCP_CMND:
ZFCP_LOG_FLAGS(3, "FSF_QTCB_FCP_CMND\n");
zfcp_fsf_send_fcp_command_handler(fsf_req);
break;
case FSF_QTCB_ABORT_FCP_CMND:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_ABORT_FCP_CMND\n");
zfcp_fsf_abort_fcp_command_handler(fsf_req);
break;
case FSF_QTCB_SEND_GENERIC:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_GENERIC\n");
zfcp_fsf_send_ct_handler(fsf_req);
break;
case FSF_QTCB_OPEN_PORT_WITH_DID:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_PORT_WITH_DID\n");
zfcp_fsf_open_port_handler(fsf_req);
break;
case FSF_QTCB_OPEN_LUN:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_LUN\n");
zfcp_fsf_open_unit_handler(fsf_req);
break;
case FSF_QTCB_CLOSE_LUN:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_LUN\n");
zfcp_fsf_close_unit_handler(fsf_req);
break;
case FSF_QTCB_CLOSE_PORT:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PORT\n");
zfcp_fsf_close_port_handler(fsf_req);
break;
case FSF_QTCB_CLOSE_PHYSICAL_PORT:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PHYSICAL_PORT\n");
zfcp_fsf_close_physical_port_handler(fsf_req);
break;
case FSF_QTCB_EXCHANGE_CONFIG_DATA:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_CONFIG_DATA\n");
zfcp_fsf_exchange_config_data_handler(fsf_req);
break;
case FSF_QTCB_EXCHANGE_PORT_DATA:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_PORT_DATA\n");
zfcp_fsf_exchange_port_data_handler(fsf_req);
break;
case FSF_QTCB_SEND_ELS:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_ELS\n");
zfcp_fsf_send_els_handler(fsf_req);
break;
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_DOWNLOAD_CONTROL_FILE\n");
zfcp_fsf_control_file_handler(fsf_req);
break;
case FSF_QTCB_UPLOAD_CONTROL_FILE:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_UPLOAD_CONTROL_FILE\n");
zfcp_fsf_control_file_handler(fsf_req);
break;
default:
ZFCP_LOG_FLAGS(2, "FSF_QTCB_UNKNOWN\n");
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(fsf_req->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(fsf_req->adapter),
fsf_req->fsf_command,
fsf_req->qtcb->header.fsf_command);
}
if (!erp_action)
return retval;
debug_text_event(adapter->erp_dbf, 3, "a_frh");
debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
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 = 0;
/* 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_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->sbale_curr = 2;
status_buffer =
mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
if (!status_buffer) {
ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
goto failed_buf;
}
memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
fsf_req->data.status_read.buffer = 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);
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(fsf_req, NULL);
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:
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 = fsf_req->data.status_read.buffer;
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%08x 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_LOG_FLAGS(2, "FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT\n");
debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
zfcp_erp_port_reopen(port, 0);
break;
case FSF_STATUS_READ_SUB_ERROR_PORT:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SUB_ERROR_PORT\n");
debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
zfcp_erp_port_shutdown(port, 0);
break;
default:
debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
debug_exception(adapter->erp_dbf, 0,
&status_buffer->status_subtype, sizeof (u32));
ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
"for a reopen indication on port with "
"d_id 0x%08x 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 =
fsf_req->data.status_read.buffer;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
mempool_free(status_buffer, adapter->pool.data_status_read);
zfcp_fsf_req_cleanup(fsf_req);
goto out;
}
switch (status_buffer->status_type) {
case FSF_STATUS_READ_PORT_CLOSED:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_PORT_CLOSED\n");
debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:");
debug_event(adapter->erp_dbf, 3,
&status_buffer->d_id, sizeof (u32));
zfcp_fsf_status_read_port_closed(fsf_req);
break;
case FSF_STATUS_READ_INCOMING_ELS:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_INCOMING_ELS\n");
debug_text_event(adapter->erp_dbf, 3, "unsol_els:");
zfcp_fsf_incoming_els(fsf_req);
break;
case FSF_STATUS_READ_SENSE_DATA_AVAIL:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SENSE_DATA_AVAIL\n");
debug_text_event(adapter->erp_dbf, 3, "unsol_sense:");
ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer,
sizeof(struct fsf_status_read_buffer));
break;
case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_BIT_ERROR_THRESHOLD\n");
debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:");
ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
(char *) status_buffer,
sizeof (struct fsf_status_read_buffer));
break;
case FSF_STATUS_READ_LINK_DOWN:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_DOWN\n");
debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:");
ZFCP_LOG_INFO("Local link to adapter %s is down\n",
zfcp_get_busid_by_adapter(adapter));
atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
&adapter->status);
zfcp_erp_adapter_failed(adapter);
break;
case FSF_STATUS_READ_LINK_UP:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_UP\n");
debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:");
ZFCP_LOG_INFO("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,
ZFCP_STATUS_COMMON_RUNNING,
ZFCP_SET);
zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
| ZFCP_STATUS_COMMON_ERP_FAILED);
break;
case FSF_STATUS_READ_CFDC_UPDATED:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_UPDATED\n");
debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:");
ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_access_changed(adapter);
break;
case FSF_STATUS_READ_CFDC_HARDENED:
ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_HARDENED\n");
debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:");
switch (status_buffer->status_subtype) {
case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
ZFCP_LOG_INFO("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_INFO("CFDC of adapter %s has been copied "
"to the secondary SE\n",
zfcp_get_busid_by_adapter(adapter));
break;
default:
ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n",
zfcp_get_busid_by_adapter(adapter));
}
break;
default:
debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:");
debug_exception(adapter->erp_dbf, 0,
&status_buffer->status_type, sizeof (u32));
ZFCP_LOG_NORMAL("bug: 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_cleanup(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?)
*/
retval = zfcp_fsf_status_read(adapter, 0);
if (retval < 0) {
ZFCP_LOG_INFO("Failed to create unsolicited status read "
"request for the adapter %s.\n",
zfcp_get_busid_by_adapter(adapter));
/* temporary fix to avoid status read buffer shortage */
adapter->status_read_failed++;
if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
< ZFCP_STATUS_READ_FAILED_THRESHOLD) {
ZFCP_LOG_INFO("restart adapter %s due to status read "
"buffer shortage\n",
zfcp_get_busid_by_adapter(adapter));
zfcp_erp_adapter_reopen(adapter, 0);
}
}
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;
unsigned long lock_flags;
struct zfcp_fsf_req *fsf_req = NULL;
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;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->data.abort_fcp_command.unit = 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;
/* start QDIO request for this FSF request */
zfcp_fsf_start_scsi_er_timer(adapter);
retval = zfcp_fsf_req_send(fsf_req, NULL);
if (retval) {
del_timer(&adapter->scsi_er_timer);
ZFCP_LOG_INFO("error: Failed to send abort command request "
"on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->wwpn, unit->fcp_lun);
zfcp_fsf_req_free(fsf_req);
fsf_req = NULL;
goto out;
}
ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
"(adapter%s, port d_id=0x%08x, "
"unit x%016Lx, old_req_id=0x%lx)\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->d_id,
unit->fcp_lun, old_req_id);
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 = new_fsf_req->data.abort_fcp_command.unit;
unsigned char status_qual =
new_fsf_req->qtcb->header.fsf_status_qual.word[0];
del_timer(&new_fsf_req->adapter->scsi_er_timer);
if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
/* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
goto skip_fsfstatus;
}
/* evaluate FSF status in QTCB */
switch (new_fsf_req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
if (status_qual >> 4 != status_qual % 0xf) {
ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
"fsf_s_phand_nv0");
/*
* In this case a command that was sent prior to a port
* reopen was aborted (handles are different). This is
* fine.
*/
} else {
ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
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 */
debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
"fsf_s_phand_nv1");
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
case FSF_LUN_HANDLE_NOT_VALID:
if (status_qual >> 4 != status_qual % 0xf) {
/* 2 */
ZFCP_LOG_FLAGS(0, "FSF_LUN_HANDLE_NOT_VALID\n");
debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
"fsf_s_lhand_nv0");
/*
* In this case a command that was sent prior to a unit
* reopen was aborted (handles are different).
* This is fine.
*/
} else {
ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
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 */
debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
"fsf_s_lhand_nv1");
zfcp_erp_port_reopen(unit->port, 0);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
case FSF_FCP_COMMAND_DOES_NOT_EXIST:
ZFCP_LOG_FLAGS(2, "FSF_FCP_COMMAND_DOES_NOT_EXIST\n");
retval = 0;
debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
"fsf_s_no_exist");
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
break;
case FSF_PORT_BOXED:
/* 2 */
ZFCP_LOG_FLAGS(0, "FSF_PORT_BOXED\n");
ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
"be reopened\n", unit->port->wwpn,
zfcp_get_busid_by_unit(unit));
debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
"fsf_s_pboxed");
zfcp_erp_port_reopen(unit->port, 0);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_BOXED:
ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
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));
debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
zfcp_erp_unit_reopen(unit, 0);
zfcp_cmd_dbf_event_fsf("unitbox", new_fsf_req,
&new_fsf_req->qtcb->header.fsf_status_qual,
sizeof(union fsf_status_qual));
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
/* 2 */
ZFCP_LOG_FLAGS(0, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ltest");
/* reopening link to port */
zfcp_erp_port_reopen(unit->port, 0);
new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
/* SCSI stack will escalate */
debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ulp");
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]);
debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
"fsf_sq_inval:");
debug_exception(new_fsf_req->adapter->erp_dbf, 0,
&new_fsf_req->qtcb->header.
fsf_status_qual.word[0], sizeof (u32));
break;
}
break;
case FSF_GOOD:
/* 3 */
ZFCP_LOG_FLAGS(0, "FSF_GOOD\n");
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);
debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
"fsf_s_inval:");
debug_exception(new_fsf_req->adapter->erp_dbf, 0,
&new_fsf_req->qtcb->header.fsf_status,
sizeof (u32));
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;
}
if (erp_action != NULL) {
erp_action->fsf_req = fsf_req;
fsf_req->erp_action = erp_action;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 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->supported_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 = adapter->fc_service_class;
fsf_req->qtcb->bottom.support.timeout = ct->timeout;
fsf_req->data.send_ct = ct;
/* start QDIO request for this FSF request */
ret = zfcp_fsf_req_send(fsf_req, ct->timer);
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 by
* fsf_req->data.send_ct
* Usually a specific handler for the request is called via
* fsf_req->data.send_ct->handler at end of this function.
*/
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 = fsf_req->data.send_ct;
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_LOG_FLAGS(2,"FSF_GOOD\n");
retval = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
if (adapter->fc_service_class <= 3) {
ZFCP_LOG_INFO("error: adapter %s does not support fc "
"class %d.\n",
zfcp_get_busid_by_port(port),
adapter->fc_service_class);
} else {
ZFCP_LOG_INFO("bug: The fibre channel class at the "
"adapter %s is invalid. "
"(debug info %d)\n",
zfcp_get_busid_by_port(port),
adapter->fc_service_class);
}
/* stop operation for this adapter */
debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
zfcp_erp_adapter_shutdown(adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
/* reopening link to port */
debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
zfcp_test_link(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
/* ERP strategy will escalate */
debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
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_FLAGS(2, "FSF_ACCESS_DENIED\n");
ZFCP_LOG_NORMAL("access denied, cannot send generic service "
"command (adapter %s, port d_id=0x%08x)\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;
}
}
debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
zfcp_erp_port_access_denied(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_GENERIC_COMMAND_REJECTED:
ZFCP_LOG_FLAGS(2, "FSF_GENERIC_COMMAND_REJECTED\n");
ZFCP_LOG_INFO("generic service command rejected "
"(adapter %s, port d_id=0x%08x)\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));
debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_HANDLE_NOT_VALID:
ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
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));
debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
zfcp_erp_adapter_reopen(adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
ZFCP_LOG_INFO("port needs to be reopened "
"(adapter %s, port d_id=0x%08x)\n",
zfcp_get_busid_by_port(port), port->d_id);
debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
zfcp_erp_port_reopen(port, 0);
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_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
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_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
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_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
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_FLAGS(2, "FSF_SBAL_MISMATCH\n");
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);
debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
debug_exception(adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0], sizeof (u32));
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;
fc_id_t 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%08x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
goto failed_req;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 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->supported_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%08x)\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%08x)\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%08x)\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 = adapter->fc_service_class;
fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
fsf_req->data.send_els = els;
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
/* start QDIO request for this FSF request */
ret = zfcp_fsf_req_send(fsf_req, els->timer);
if (ret) {
ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
"(adapter %s, port d_id: 0x%08x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
goto failed_send;
}
ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
"0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
goto out;
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 by
* fsf_req->data.send_els
* Usually a specific handler for the command is called via
* fsf_req->data.send_els->handler at end of this function.
*/
static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter;
fc_id_t d_id;
struct zfcp_port *port;
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 = fsf_req->data.send_els;
adapter = send_els->adapter;
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_LOG_FLAGS(2, "FSF_GOOD\n");
retval = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
if (adapter->fc_service_class <= 3) {
ZFCP_LOG_INFO("error: adapter %s does "
"not support fibrechannel class %d.\n",
zfcp_get_busid_by_adapter(adapter),
adapter->fc_service_class);
} else {
ZFCP_LOG_INFO("bug: The fibrechannel class at "
"adapter %s is invalid. "
"(debug info %d)\n",
zfcp_get_busid_by_adapter(adapter),
adapter->fc_service_class);
}
/* stop operation for this adapter */
debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
zfcp_erp_adapter_shutdown(adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
if (send_els->ls_code != ZFCP_LS_ADISC) {
read_lock(&zfcp_data.config_lock);
port = zfcp_get_port_by_did(adapter, d_id);
if (port)
zfcp_test_link(port);
read_unlock(&zfcp_data.config_lock);
}
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval =
zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
(struct zfcp_ls_rjt_par *)
&header->fsf_status_qual.word[2]);
break;
case FSF_SQ_RETRY_IF_POSSIBLE:
ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
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_FLAGS(2, "FSF_ELS_COMMAND_REJECTED\n");
ZFCP_LOG_INFO("ELS has been rejected because command filter "
"prohibited sending "
"(adapter: %s, port d_id: 0x%08x)\n",
zfcp_get_busid_by_adapter(adapter), d_id);
break;
case FSF_PAYLOAD_SIZE_MISMATCH:
ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
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_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
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_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
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_FLAGS(2, "FSF_SBAL_MISMATCH\n");
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_FLAGS(2, "FSF_ACCESS_DENIED\n");
ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
"(adapter %s, port d_id=0x%08x)\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;
}
}
debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
read_lock(&zfcp_data.config_lock);
port = zfcp_get_port_by_did(adapter, d_id);
if (port != NULL)
zfcp_erp_port_access_denied(port);
read_unlock(&zfcp_data.config_lock);
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);
debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
debug_exception(adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0], sizeof(u32));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
skip_fsfstatus:
send_els->status = retval;
if (send_els->handler != 0)
send_els->handler(send_els->handler_data);
return retval;
}
/*
* function:
*
* purpose:
*
* returns: address of initiated FSF request
* NULL - request could not be initiated
*/
int
zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
unsigned long lock_flags;
int retval = 0;
/* setup new FSF request */
retval = zfcp_fsf_req_create(erp_action->adapter,
FSF_QTCB_EXCHANGE_CONFIG_DATA,
ZFCP_REQ_AUTO_CLEANUP,
erp_action->adapter->pool.fsf_req_erp,
&lock_flags, &(erp_action->fsf_req));
if (retval < 0) {
ZFCP_LOG_INFO("error: Could not create exchange configuration "
"data request for adapter %s.\n",
zfcp_get_busid_by_adapter(erp_action->adapter));
goto out;
}
sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
erp_action->fsf_req->sbal_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
erp_action->fsf_req->erp_action = erp_action;
erp_action->fsf_req->qtcb->bottom.config.feature_selection =
(FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING);
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
if (retval) {
ZFCP_LOG_INFO
("error: Could not send exchange configuration data "
"command on the adapter %s\n",
zfcp_get_busid_by_adapter(erp_action->adapter));
zfcp_fsf_req_free(erp_action->fsf_req);
erp_action->fsf_req = NULL;
goto out;
}
ZFCP_LOG_DEBUG("exchange configuration data request initiated "
"(adapter %s)\n",
zfcp_get_busid_by_adapter(erp_action->adapter));
out:
write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
lock_flags);
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;
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->supported_features = bottom->supported_features;
adapter->peer_wwpn = 0;
adapter->peer_wwnn = 0;
adapter->peer_d_id = 0;
if (xchg_ok) {
adapter->wwnn = bottom->nport_serv_param.wwnn;
adapter->wwpn = bottom->nport_serv_param.wwpn;
adapter->s_id = bottom->s_id & ZFCP_DID_MASK;
adapter->fc_topology = bottom->fc_topology;
adapter->fc_link_speed = bottom->fc_link_speed;
adapter->hydra_version = bottom->adapter_type;
} else {
adapter->wwnn = 0;
adapter->wwpn = 0;
adapter->s_id = 0;
adapter->fc_topology = 0;
adapter->fc_link_speed = 0;
adapter->hydra_version = 0;
}
if (adapter->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;
}
if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){
adapter->hardware_version = bottom->hardware_version;
memcpy(adapter->serial_number, bottom->serial_number, 17);
EBCASC(adapter->serial_number, sizeof(adapter->serial_number));
}
ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n"
"WWNN 0x%016Lx, "
"WWPN 0x%016Lx, "
"S_ID 0x%08x,\n"
"adapter version 0x%x, "
"LIC version 0x%x, "
"FC link speed %d Gb/s\n",
zfcp_get_busid_by_adapter(adapter),
adapter->wwnn,
adapter->wwpn,
(unsigned int) adapter->s_id,
adapter->hydra_version,
adapter->fsf_lic_version,
adapter->fc_link_speed);
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));
debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
zfcp_erp_adapter_shutdown(adapter, 0);
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));
debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
zfcp_erp_adapter_shutdown(adapter, 0);
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;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
return -EIO;
switch (fsf_req->qtcb->header.fsf_status) {
case FSF_GOOD:
ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
return -EIO;
switch (adapter->fc_topology) {
case FSF_TOPO_P2P:
ZFCP_LOG_FLAGS(1, "FSF_TOPO_P2P\n");
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);
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"top-p-to-p");
break;
case FSF_TOPO_AL:
ZFCP_LOG_FLAGS(1, "FSF_TOPO_AL\n");
ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
"topology detected at adapter %s "
"unsupported, shutting down adapter\n",
zfcp_get_busid_by_adapter(adapter));
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"top-al");
zfcp_erp_adapter_shutdown(adapter, 0);
return -EIO;
case FSF_TOPO_FABRIC:
ZFCP_LOG_FLAGS(1, "FSF_TOPO_FABRIC\n");
ZFCP_LOG_INFO("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));
adapter->fc_topology = FSF_TOPO_ERROR;
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"unknown-topo");
zfcp_erp_adapter_shutdown(adapter, 0);
return -EIO;
}
bottom = &fsf_req->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));
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"qtcb-size");
debug_event(fsf_req->adapter->erp_dbf, 0,
&bottom->max_qtcb_size, sizeof (u32));
zfcp_erp_adapter_shutdown(adapter, 0);
return -EIO;
}
atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
&adapter->status);
break;
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
return -EIO;
ZFCP_LOG_INFO("Local link to adapter %s is down\n",
zfcp_get_busid_by_adapter(adapter));
atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
&adapter->status);
zfcp_erp_adapter_failed(adapter);
break;
default:
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
debug_event(fsf_req->adapter->erp_dbf, 0,
&fsf_req->qtcb->header.fsf_status, sizeof (u32));
zfcp_erp_adapter_shutdown(adapter, 0);
return -EIO;
}
return 0;
}
/**
* zfcp_fsf_exchange_port_data - request information about local port
* @adapter: for which port data is requested
* @data: response to exchange port data request
*/
int
zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
struct fsf_qtcb_bottom_port *data)
{
volatile struct qdio_buffer_element *sbale;
int retval = 0;
unsigned long lock_flags;
struct zfcp_fsf_req *fsf_req;
struct timer_list *timer;
if(!(adapter->supported_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;
}
timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
if (!timer)
return -ENOMEM;
/* setup new FSF request */
retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
0, 0, &lock_flags, &fsf_req);
if (retval < 0) {
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);
goto out;
}
sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
fsf_req->data.port_data = data;
init_timer(timer);
timer->function = zfcp_fsf_request_timeout_handler;
timer->data = (unsigned long) adapter;
timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
retval = zfcp_fsf_req_send(fsf_req, timer);
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);
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
goto out;
}
ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
zfcp_get_busid_by_adapter(adapter));
write_unlock_irqrestore(&adapter->request_queue.queue_lock,
lock_flags);
wait_event(fsf_req->completion_wq,
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
del_timer_sync(timer);
zfcp_fsf_req_cleanup(fsf_req);
out:
kfree(timer);
return retval;
}
/**
* 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 fsf_qtcb_bottom_port *bottom;
struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data;
if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
return;
switch (fsf_req->qtcb->header.fsf_status) {
case FSF_GOOD:
ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
bottom = &fsf_req->qtcb->bottom.port;
memcpy(data, bottom, sizeof(*data));
break;
default:
debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
debug_event(fsf_req->adapter->erp_dbf, 0,
&fsf_req->qtcb->header.fsf_status, sizeof(u32));
}
}
/*
* 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;
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, &(erp_action->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(erp_action->fsf_req,
erp_action->fsf_req->sbal_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
erp_action->fsf_req->data.open_port.port = erp_action->port;
erp_action->fsf_req->erp_action = erp_action;
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
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(erp_action->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 = fsf_req->data.open_port.port;
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_FLAGS(0, "FSF_PORT_ALREADY_OPEN\n");
ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
"is already open.\n",
port->wwpn, zfcp_get_busid_by_port(port));
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"fsf_s_popen");
/*
* This is a bug, however operation should continue normally
* if it is simply ignored
*/
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
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;
}
}
debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
zfcp_erp_port_access_denied(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_max_ports");
zfcp_erp_port_failed(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ltest");
/* ERP strategy will escalate */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
/* ERP strategy will escalate */
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ulp");
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_NO_RETRY_POSSIBLE:
ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RETRY_POSSIBLE\n");
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));
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_no_retry");
zfcp_erp_port_failed(port);
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]);
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_inval:");
debug_exception(
fsf_req->adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0],
sizeof (u32));
break;
}
break;
case FSF_GOOD:
ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
/* 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);
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 <
((((unsigned long) &plogi->serv_param.wwpn) -
((unsigned long) plogi)) + sizeof (u64))) {
ZFCP_LOG_INFO(
"warning: insufficient length of "
"PLOGI payload (%i)\n",
fsf_req->qtcb->bottom.support.els1_length);
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_s_short_plogi:");
/* 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);
debug_text_event(
fsf_req->adapter->erp_dbf, 0,
"fsf_s_did_change:");
atomic_clear_mask(
ZFCP_STATUS_PORT_DID_DID,
&port->status);
} else
port->wwnn = plogi->serv_param.wwnn;
}
}
break;
case FSF_UNKNOWN_OP_SUBTYPE:
/* should never occure, subtype not set in zfcp_fsf_open_port */
ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
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);
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&header->fsf_status, sizeof (u32));
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;
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, &(erp_action->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(erp_action->fsf_req,
erp_action->fsf_req->sbal_curr, 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);
erp_action->fsf_req->data.close_port.port = erp_action->port;
erp_action->fsf_req->erp_action = erp_action;
erp_action->fsf_req->qtcb->header.port_handle =
erp_action->port->handle;
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
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(erp_action->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 = fsf_req->data.close_port.port;
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_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_phand_nv");
zfcp_erp_adapter_reopen(port->adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
/* 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_FLAGS(3, "FSF_GOOD\n");
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,
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);
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&fsf_req->qtcb->header.fsf_status,
sizeof (u32));
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)
{
int retval = 0;
unsigned long lock_flags;
volatile struct qdio_buffer_element *sbale;
/* 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, &erp_action->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(erp_action->fsf_req,
erp_action->fsf_req->sbal_curr, 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 */
erp_action->fsf_req->data.close_physical_port.port = erp_action->port;
/* port to be closeed */
erp_action->fsf_req->qtcb->header.port_handle =
erp_action->port->handle;
erp_action->fsf_req->erp_action = erp_action;
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
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(erp_action->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 = fsf_req->data.close_physical_port.port;
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_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_phand_nv");
zfcp_erp_adapter_reopen(port->adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
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;
}
}
debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
zfcp_erp_port_access_denied(port);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
zfcp_erp_port_reopen(port, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ltest");
/* This will now be escalated by ERP */
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
/* ERP strategy will escalate */
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ulp");
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]);
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_inval:");
debug_exception(
fsf_req->adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0], sizeof (u32));
break;
}
break;
case FSF_GOOD:
ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
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);
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&header->fsf_status, sizeof (u32));
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;
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, &(erp_action->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(erp_action->fsf_req,
erp_action->fsf_req->sbal_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
erp_action->fsf_req->qtcb->header.port_handle =
erp_action->port->handle;
erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
erp_action->unit->fcp_lun;
erp_action->fsf_req->qtcb->bottom.support.option =
FSF_OPEN_LUN_SUPPRESS_BOXING;
atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
erp_action->fsf_req->data.open_unit.unit = erp_action->unit;
erp_action->fsf_req->erp_action = erp_action;
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
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(erp_action->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;
u32 allowed, exclusive, readwrite;
unit = fsf_req->data.open_unit.unit;
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;
allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
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_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
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));
debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_ALREADY_OPEN:
ZFCP_LOG_FLAGS(0, "FSF_LUN_ALREADY_OPEN\n");
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));
debug_text_exception(adapter->erp_dbf, 0,
"fsf_s_uopen");
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
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;
}
}
debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
zfcp_erp_unit_access_denied(unit);
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_FLAGS(2, "FSF_PORT_BOXED\n");
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));
debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
zfcp_erp_port_reopen(unit->port, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_SHARING_VIOLATION:
ZFCP_LOG_FLAGS(2, "FSF_LUN_SHARING_VIOLATION\n");
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));
debug_text_event(adapter->erp_dbf, 2,
"fsf_s_l_sh_vio");
zfcp_erp_unit_access_denied(unit);
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_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED\n");
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));
debug_text_event(adapter->erp_dbf, 1,
"fsf_s_max_units");
zfcp_erp_unit_failed(unit);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
/* Re-establish link to port */
debug_text_event(adapter->erp_dbf, 1,
"fsf_sq_ltest");
zfcp_erp_port_reopen(unit->port, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
/* ERP strategy will escalate */
debug_text_event(adapter->erp_dbf, 1,
"fsf_sq_ulp");
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]);
debug_text_event(adapter->erp_dbf, 0,
"fsf_sq_inval:");
debug_exception(adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0],
sizeof (u32));
}
break;
case FSF_INVALID_COMMAND_OPTION:
ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
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:
ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
/* 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->supported_features & FSF_FEATURE_LUN_SHARING){
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);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_unit_shutdown(unit, 0);
} else if (!exclusive && readwrite) {
ZFCP_LOG_NORMAL("shared access of read-write "
"unit not supported\n");
zfcp_erp_unit_failed(unit);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
zfcp_erp_unit_shutdown(unit, 0);
}
}
retval = 0;
break;
default:
ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
"(debug info 0x%x)\n",
header->fsf_status);
debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
debug_exception(adapter->erp_dbf, 0,
&header->fsf_status, sizeof (u32));
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;
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, &(erp_action->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(erp_action->fsf_req,
erp_action->fsf_req->sbal_curr, 0);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
erp_action->fsf_req->qtcb->header.port_handle =
erp_action->port->handle;
erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
erp_action->fsf_req->data.close_unit.unit = erp_action->unit;
erp_action->fsf_req->erp_action = erp_action;
/* start QDIO request for this FSF request */
retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
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(erp_action->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 = fsf_req->data.close_unit.unit; /* restore unit */
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_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_phand_nv");
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_HANDLE_NOT_VALID:
ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_lhand_nv");
zfcp_erp_port_reopen(unit->port, 0);
zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
&fsf_req->qtcb->header.fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
zfcp_erp_port_reopen(unit->port, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
/* re-establish link to port */
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ltest");
zfcp_erp_port_reopen(unit->port, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
/* ERP strategy will escalate */
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ulp");
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]);
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_inval:");
debug_exception(
fsf_req->adapter->erp_dbf, 0,
&fsf_req->qtcb->header.fsf_status_qual.word[0],
sizeof (u32));
break;
}
break;
case FSF_GOOD:
ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
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);
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&fsf_req->qtcb->header.fsf_status,
sizeof (u32));
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,
struct timer_list *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;
}
/*
* associate FSF request with SCSI request
* (need this for look up on abort)
*/
fsf_req->data.send_fcp_command_task.fsf_req = fsf_req;
scsi_cmnd->host_scribble = (char *) &(fsf_req->data);
/*
* associate SCSI command with FSF request
* (need this for look up on normal command completion)
*/
fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd;
fsf_req->data.send_fcp_command_task.start_jiffies = jiffies;
fsf_req->data.send_fcp_command_task.unit = unit;
ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun);
/* 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:
ZFCP_LOG_FLAGS(3, "DMA_NONE\n");
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:
ZFCP_LOG_FLAGS(3, "DMA_FROM_DEVICE\n");
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:
ZFCP_LOG_FLAGS(3, "DMA_TO_DEVICE\n");
fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
sbtype = SBAL_FLAGS0_TYPE_WRITE;
fcp_cmnd_iu->wddata = 1;
break;
case DMA_BIDIRECTIONAL:
ZFCP_LOG_FLAGS(0, "DMA_BIDIRECTIONAL not supported\n");
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 = adapter->fc_service_class;
/* 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);
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);
/*
* start QDIO request for this FSF request
* covered by an SBALE)
*/
retval = zfcp_fsf_req_send(fsf_req, timer);
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_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;
}
/*
* function: zfcp_fsf_send_fcp_command_task_management
*
* purpose:
*
* returns:
*
* 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_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;
}
/*
* 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.send_fcp_command_task_management.unit = 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 = adapter->fc_service_class;
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_curr, 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;
/* start QDIO request for this FSF request */
zfcp_fsf_start_scsi_er_timer(adapter);
retval = zfcp_fsf_req_send(fsf_req, NULL);
if (retval) {
del_timer(&adapter->scsi_er_timer);
ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
"management) on adapter %s, port 0x%016Lx for "
"unit LUN 0x%016Lx\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->wwpn,
unit->fcp_lun);
zfcp_fsf_req_free(fsf_req);
fsf_req = NULL;
goto out;
}
ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
"(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
"tm_flags=0x%x)\n",
zfcp_get_busid_by_adapter(adapter),
unit->port->wwpn,
unit->fcp_lun,
tm_flags);
out:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
return fsf_req;
}
/*
* 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 = fsf_req->data.send_fcp_command_task_management.unit;
else
unit = fsf_req->data.send_fcp_command_task.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_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_phand_nv");
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_LUN_HANDLE_NOT_VALID:
ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_uhand_nv");
zfcp_erp_port_reopen(unit->port, 0);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_HANDLE_MISMATCH:
ZFCP_LOG_FLAGS(0, "FSF_HANDLE_MISMATCH\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_hand_mis");
zfcp_erp_adapter_reopen(unit->port->adapter, 0);
zfcp_cmd_dbf_event_fsf("handmism",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
ZFCP_LOG_FLAGS(0, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
if (fsf_req->adapter->fc_service_class <= 3) {
ZFCP_LOG_NORMAL("error: The adapter %s does "
"not support fibrechannel class %d.\n",
zfcp_get_busid_by_unit(unit),
fsf_req->adapter->fc_service_class);
} else {
ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
"adapter %s is invalid. "
"(debug info %d)\n",
zfcp_get_busid_by_unit(unit),
fsf_req->adapter->fc_service_class);
}
/* stop operation for this adapter */
debug_text_exception(fsf_req->adapter->erp_dbf, 0,
"fsf_s_class_nsup");
zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
zfcp_cmd_dbf_event_fsf("unsclass",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_FCPLUN_NOT_VALID:
ZFCP_LOG_FLAGS(0, "FSF_FCPLUN_NOT_VALID\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_s_fcp_lun_nv");
zfcp_erp_port_reopen(unit->port, 0);
zfcp_cmd_dbf_event_fsf("fluninv",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_ACCESS_DENIED:
ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
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;
}
}
debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
zfcp_erp_unit_access_denied(unit);
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_DIRECTION_INDICATOR_NOT_VALID:
ZFCP_LOG_FLAGS(0, "FSF_DIRECTION_INDICATOR_NOT_VALID\n");
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 */
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_s_dir_ind_nv");
zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
zfcp_cmd_dbf_event_fsf("dirinv",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_CMND_LENGTH_NOT_VALID:
ZFCP_LOG_FLAGS(0, "FSF_CMND_LENGTH_NOT_VALID\n");
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 */
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_s_cmd_len_nv");
zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
zfcp_cmd_dbf_event_fsf("cleninv",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_PORT_BOXED:
ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
zfcp_erp_port_reopen(unit->port, 0);
zfcp_cmd_dbf_event_fsf("portbox", fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_LUN_BOXED:
ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
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);
debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
zfcp_erp_unit_reopen(unit, 0);
zfcp_cmd_dbf_event_fsf("unitbox", fsf_req,
&header->fsf_status_qual,
sizeof(union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
| ZFCP_STATUS_FSFREQ_RETRY;
break;
case FSF_ADAPTER_STATUS_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
ZFCP_LOG_FLAGS(2,
"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
/* re-establish link to port */
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ltest");
zfcp_erp_port_reopen(unit->port, 0);
zfcp_cmd_dbf_event_fsf(
"sqltest",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
ZFCP_LOG_FLAGS(3,
"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
/* FIXME(hw) need proper specs for proper action */
/* let scsi stack deal with retries and escalation */
debug_text_event(fsf_req->adapter->erp_dbf, 1,
"fsf_sq_ulp");
zfcp_cmd_dbf_event_fsf(
"sqdeperp",
fsf_req,
&header->fsf_status_qual,
sizeof (union fsf_status_qual));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
default:
/* FIXME: shall we consider this a successful transfer? */
ZFCP_LOG_NORMAL
("bug: Wrong status qualifier 0x%x arrived.\n",
header->fsf_status_qual.word[0]);
debug_text_event(fsf_req->adapter->erp_dbf, 0,
"fsf_sq_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0],
sizeof(u32));
break;
}
break;
case FSF_GOOD:
ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
break;
case FSF_FCP_RSP_AVAILABLE:
ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
break;
default:
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&header->fsf_status, sizeof(u32));
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);
}
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->data.send_fcp_command_task.unit;
read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd;
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);
}
/* 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:
ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
/* 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:
ZFCP_LOG_FLAGS(0, "RSP_CODE_LENGTH_MISMATCH\n");
/* 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);
zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
set_host_byte(&scpnt->result, DID_ERROR);
goto skip_fsfstatus;
case RSP_CODE_FIELD_INVALID:
ZFCP_LOG_FLAGS(0, "RSP_CODE_FIELD_INVALID\n");
/* 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);
zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
goto skip_fsfstatus;
case RSP_CODE_RO_MISMATCH:
ZFCP_LOG_FLAGS(0, "RSP_CODE_RO_MISMATCH\n");
/* 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);
zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
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);
zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
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,
(void *) &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));
scpnt->resid = fcp_rsp_iu->fcp_resid;
if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow)
set_host_byte(&scpnt->result, DID_ERROR);
}
skip_fsfstatus:
ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
zfcp_cmd_dbf_event_scsi("response", scpnt);
/* cleanup pointer (need this especially for abort) */
scpnt->host_scribble = NULL;
/*
* NOTE:
* according to the outcome of a discussion on linux-scsi we
* don't need to grab the io_request_lock here since we use
* the new eh
*/
/* 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 =
fsf_req->data.send_fcp_command_task_management.unit;
del_timer(&fsf_req->adapter->scsi_er_timer);
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:
ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
/* ok, continue */
ZFCP_LOG_DEBUG("no failure or Task Management "
"Function complete\n");
break;
case RSP_CODE_TASKMAN_UNSUPP:
ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_UNSUPP\n");
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_FLAGS(0, "RSP_CODE_TASKMAN_FAILED\n");
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;
struct timer_list *timer;
unsigned long lock_flags;
int req_flags = 0;
int direction;
int retval = 0;
if (!(adapter->supported_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;
}
timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
if (!timer) {
retval = -ENOMEM;
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_curr, 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;
init_timer(timer);
timer->function = zfcp_fsf_request_timeout_handler;
timer->data = (unsigned long) adapter;
timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
retval = zfcp_fsf_req_send(fsf_req, timer);
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;
del_timer_sync(timer);
goto free_timer;
free_fsf_req:
zfcp_fsf_req_free(fsf_req);
unlock_queue_lock:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
free_timer:
kfree(timer);
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_FLAGS(2, "FSF_GOOD\n");
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:
ZFCP_LOG_FLAGS(2, "FSF_OPERATION_PARTIALLY_SUCCESSFUL\n");
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_FLAGS(2, "FSF_AUTHORIZATION_FAILURE\n");
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_FLAGS(2, "FSF_CFDC_ERROR_DETECTED\n");
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_FLAGS(2, "FSF_CONTROL_FILE_UPDATE_ERROR\n");
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_FLAGS(2, "FSF_CONTROL_FILE_TOO_LARGE\n");
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:
ZFCP_LOG_FLAGS(2, "FSF_ACCESS_CONFLICT_DETECTED\n");
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:
ZFCP_LOG_FLAGS(2, "FSF_CONFLICTS_OVERRULED\n");
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_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
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_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
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));
debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
debug_exception(fsf_req->adapter->erp_dbf, 0,
&header->fsf_status_qual.word[0], sizeof(u32));
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
retval = -EINVAL;
break;
}
skip_fsfstatus:
return retval;
}
/*
* function: zfcp_fsf_req_wait_and_cleanup
*
* purpose:
*
* FIXME(design): signal seems to be <0 !!!
* returns: 0 - request completed (*status is valid), cleanup succ.
* <0 - request completed (*status is valid), cleanup failed
* >0 - signal which interrupted waiting (*status invalid),
* request not completed, no cleanup
*
* *status is a copy of status of completed fsf_req
*/
int
zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req,
int interruptible, u32 * status)
{
int retval = 0;
int signal = 0;
if (interruptible) {
__wait_event_interruptible(fsf_req->completion_wq,
fsf_req->status &
ZFCP_STATUS_FSFREQ_COMPLETED,
signal);
if (signal) {
ZFCP_LOG_DEBUG("Caught signal %i while waiting for the "
"completion of the request at %p\n",
signal, fsf_req);
retval = signal;
goto out;
}
} else {
__wait_event(fsf_req->completion_wq,
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
}
*status = fsf_req->status;
/* cleanup request */
zfcp_fsf_req_cleanup(fsf_req);
out:
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 inline void
zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
{
if (likely(fsf_req->qtcb != NULL)) {
fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
fsf_req->qtcb->header.fsf_command = fsf_cmd;
}
}
/**
* 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;
}
zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
/* 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;
}
/*
* 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;
}
fsf_req->adapter = adapter; /* pointer to "parent" adapter */
fsf_req->fsf_command = fsf_cmd;
fsf_req->sbal_number = 1;
fsf_req->sbal_first = req_queue->free_index;
fsf_req->sbal_curr = 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_curr, 0);
/* setup common SBALE fields */
sbale[0].addr = fsf_req;
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 timer_list *timer)
{
struct zfcp_adapter *adapter;
struct zfcp_qdio_queue *req_queue;
volatile struct qdio_buffer_element *sbale;
int new_distance_from_int;
unsigned long flags;
int inc_seq_no = 1;
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);
/* set sequence counter in QTCB */
if (likely(fsf_req->qtcb)) {
fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
fsf_req->seq_no = adapter->fsf_req_seq_no;
ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
"FSF sequence counter value of %i\n",
fsf_req,
zfcp_get_busid_by_adapter(adapter),
fsf_req->qtcb->prefix.req_seq_no);
} else
inc_seq_no = 0;
/* put allocated FSF request at list tail */
write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
/* figure out expiration time of timeout and start timeout */
if (unlikely(timer)) {
timer->expires += jiffies;
add_timer(timer);
}
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);
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;
/*
* FIXME(potential race):
* timer might be expired (absolutely unlikely)
*/
if (timer)
del_timer(timer);
write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
list_del(&fsf_req->list);
write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
/*
* adjust the number of free SBALs in request queue as well as
* position of first one
*/
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; /* increase */
req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
ZFCP_LOG_DEBUG
("error: do_QDIO failed. Buffers could not be enqueued "
"to request queue.\n");
} 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 (likely(inc_seq_no)) {
adapter->fsf_req_seq_no++;
ZFCP_LOG_TRACE
("FSF sequence counter value of adapter %s "
"increased to %i\n",
zfcp_get_busid_by_adapter(adapter),
adapter->fsf_req_seq_no);
}
/* count FSF requests pending */
atomic_inc(&adapter->fsf_reqs_active);
}
return retval;
}
/*
* function: zfcp_fsf_req_cleanup
*
* purpose: cleans up an FSF request and removes it from the specified list
*
* returns:
*
* assumption: no pending SB in SBALEs other than QTCB
*/
void
zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
unsigned long flags;
write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
list_del(&fsf_req->list);
write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
zfcp_fsf_req_free(fsf_req);
}
#undef ZFCP_LOG_AREA
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