Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
new file mode 100644
index 0000000..578b9fb
--- /dev/null
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -0,0 +1,5087 @@
+/*
+ *
+ * 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;
+
+ 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->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_INFO("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("error: Point-to-point fibrechannel "
+ "configuration 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-p-to-p");
+ zfcp_erp_adapter_shutdown(adapter, 0);
+ return -EIO;
+ 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));
+ 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);
+ }
+ }
+
+ /* 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)
+ scpnt->result |= DID_ERROR << 16;
+ }
+
+ 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_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