From: Swen Schillig <swen@xxxxxxxxxxxx>
Code cleanup for the zfcp_fsf.c file.
Signed-off-by: Swen Schillig <swen@xxxxxxxxxxxx>
Signed-off-by: Christof Schmitt <christof.schmitt@xxxxxxxxxx>
---
drivers/s390/scsi/zfcp_aux.c | 4
drivers/s390/scsi/zfcp_dbf.c | 2
drivers/s390/scsi/zfcp_def.h | 31
drivers/s390/scsi/zfcp_ext.h | 12
drivers/s390/scsi/zfcp_fc.c | 11
drivers/s390/scsi/zfcp_fsf.c | 4137 +++++++++++++++---------------------------
drivers/s390/scsi/zfcp_fsf.h | 31
drivers/s390/scsi/zfcp_qdio.c | 6
drivers/s390/scsi/zfcp_scsi.c | 5
9 files changed, 1586 insertions(+), 2653 deletions(-)
--- a/drivers/s390/scsi/zfcp_fsf.c 2008-06-30 11:27:23.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c 2008-06-30 11:28:20.000000000 +0200
@@ -8,35 +8,6 @@
#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 void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
-static inline int zfcp_fsf_req_sbal_check(
- unsigned long *, struct zfcp_qdio_queue *, int);
-static inline int zfcp_use_one_sbal(
- struct scatterlist *, int, struct scatterlist *, int);
-static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
-static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
-static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
-static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
-static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
-static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8,
- struct fsf_link_down_info *);
-static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
-
/* association between FSF command and FSF QTCB type */
static u32 fsf_qtcb_type[] = {
[FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
@@ -54,21 +25,19 @@ static u32 fsf_qtcb_type[] = {
[FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
};
-static const char zfcp_act_subtable_type[5][8] = {
+static const char *zfcp_act_subtable_type[] = {
"unknown", "OS", "WWPN", "DID", "LUN"
};
static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
{
- u16 subtable = (table & 0xffff0000) >> 16;
+ u16 subtable = table >> 16;
u16 rule = table & 0xffff;
- if (subtable > 0 &&
- subtable < ARRAY_SIZE(zfcp_act_subtable_type)) {
+ if (subtable && subtable < ARRAY_SIZE(zfcp_act_subtable_type))
dev_warn(&adapter->ccw_device->dev,
"Access denied in subtable %s, rule %d.\n",
zfcp_act_subtable_type[subtable], rule);
- }
}
static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
@@ -106,90 +75,27 @@ static void zfcp_fsf_class_not_supp(stru
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
-/****************************************************************/
-/*************** FSF related Functions *************************/
-/****************************************************************/
-
-/*
- * function: zfcp_fsf_req_alloc
- *
- * purpose: Obtains an fsf_req and potentially a qtcb (for all but
- * unsolicited requests) via helper functions
- * Does some initial fsf request set-up.
- *
- * returns: pointer to allocated fsf_req if successfull
- * NULL otherwise
- *
- * locks: none
- *
- */
-static struct zfcp_fsf_req *
-zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
-{
- size_t size;
- void *ptr;
- struct zfcp_fsf_req *fsf_req = NULL;
-
- if (req_flags & ZFCP_REQ_NO_QTCB)
- size = sizeof(struct zfcp_fsf_req);
- else
- size = sizeof(struct zfcp_fsf_req_qtcb);
-
- if (likely(pool))
- ptr = mempool_alloc(pool, GFP_ATOMIC);
- else {
- if (req_flags & ZFCP_REQ_NO_QTCB)
- ptr = kmalloc(size, GFP_ATOMIC);
- else
- ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
- GFP_ATOMIC);
- }
-
- if (unlikely(!ptr))
- goto out;
-
- memset(ptr, 0, size);
-
- if (req_flags & ZFCP_REQ_NO_QTCB) {
- fsf_req = (struct zfcp_fsf_req *) ptr;
- } else {
- fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
- fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
- }
-
- fsf_req->pool = pool;
-
- out:
- return fsf_req;
-}
-
-/*
- * function: zfcp_fsf_req_free
- *
- * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
- * returns it into the pool via helper functions.
- *
- * returns: sod all
- *
- * locks: none
+/**
+ * zfcp_fsf_req_free - free memory used by fsf request
+ * @fsf_req: pointer to struct zfcp_fsf_req
*/
-void
-zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
+void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
{
- if (likely(fsf_req->pool)) {
- mempool_free(fsf_req, fsf_req->pool);
+ if (likely(req->pool)) {
+ mempool_free(req, req->pool);
return;
}
- if (fsf_req->qtcb) {
- kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
+ if (req->qtcb) {
+ kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
return;
}
-
- kfree(fsf_req);
}
-/*
+/**
+ * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
+ * @adapter: pointer to struct zfcp_adapter
+ *
* Never ever call this without shutting down the adapter first.
* Otherwise the adapter would continue using and corrupting s390 storage.
* Included BUG_ON() call to ensure this is done.
@@ -197,1815 +103,1359 @@ zfcp_fsf_req_free(struct zfcp_fsf_req *f
*/
void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
{
- struct zfcp_fsf_req *fsf_req, *tmp;
+ struct zfcp_fsf_req *req, *tmp;
unsigned long flags;
LIST_HEAD(remove_queue);
unsigned int i;
- BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
+ BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
spin_lock_irqsave(&adapter->req_list_lock, flags);
for (i = 0; i < REQUEST_LIST_SIZE; i++)
list_splice_init(&adapter->req_list[i], &remove_queue);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
- list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
- list_del(&fsf_req->list);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
- zfcp_fsf_req_complete(fsf_req);
- }
-}
-
-/*
- * function: zfcp_fsf_req_complete
- *
- * purpose: Updates active counts and timers for openfcp-reqs
- * May cleanup request after req_eval returns
- *
- * returns: 0 - success
- * !0 - failure
- *
- * context:
- */
-int
-zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
-{
- int retval = 0;
- int cleanup;
-
- if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
- /*
- * Note: all cleanup handling is done in the callchain of
- * the function call-chain below.
- */
- zfcp_fsf_status_read_handler(fsf_req);
- goto out;
- } else {
- del_timer(&fsf_req->timer);
- zfcp_fsf_protstatus_eval(fsf_req);
- }
-
- /*
- * fsf_req may be deleted due to waking up functions, so
- * cleanup is saved here and used later
- */
- if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
- cleanup = 1;
- else
- cleanup = 0;
-
- fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
-
- /* cleanup request if requested by initiator */
- if (likely(cleanup)) {
- /*
- * lock must not be held here since it will be
- * grabed by the called routine, too
- */
- zfcp_fsf_req_free(fsf_req);
- } else {
- /* notify initiator waiting for the requests completion */
- /*
- * FIXME: Race! We must not access fsf_req here as it might have been
- * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
- * flag. It's an improbable case. But, we have the same paranoia for
- * the cleanup flag already.
- * Might better be handled using complete()?
- * (setting the flag and doing wakeup ought to be atomic
- * with regard to checking the flag as long as waitqueue is
- * part of the to be released structure)
- */
- wake_up(&fsf_req->completion_wq);
- }
-
- out:
- return retval;
-}
-
-/*
- * function: zfcp_fsf_protstatus_eval
- *
- * purpose: evaluates the QTCB of the finished FSF request
- * and initiates appropriate actions
- * (usually calling FSF command specific handlers)
- *
- * returns:
- *
- * context:
- *
- * locks:
- */
-static int
-zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
-{
- int retval = 0;
- struct zfcp_adapter *adapter = fsf_req->adapter;
- struct fsf_qtcb *qtcb = fsf_req->qtcb;
- union fsf_prot_status_qual *prot_status_qual =
- &qtcb->prefix.prot_status_qual;
-
- zfcp_hba_dbf_event_fsf_response(fsf_req);
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
- ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
- goto skip_protstatus;
- }
-
- /* evaluate FSF Protocol Status */
- switch (qtcb->prefix.prot_status) {
-
- case FSF_PROT_GOOD:
- case FSF_PROT_FSF_STATUS_PRESENTED:
- break;
-
- case FSF_PROT_QTCB_VERSION_ERROR:
- dev_err(&adapter->ccw_device->dev,
- "The QTCB version requested by zfcp (0x%x) is not "
- "supported by the FCP adapter (lowest supported 0x%x, "
- "highest supported 0x%x).\n",
- ZFCP_QTCB_VERSION, prot_status_qual->word[0],
- prot_status_qual->word[1]);
- zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PROT_SEQ_NUMB_ERROR:
- zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PROT_UNSUPP_QTCB_TYPE:
- dev_err(&adapter->ccw_device->dev,
- "Packet header type used by the device driver is "
- "incompatible with that used on the adapter.\n");
- zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PROT_HOST_CONNECTION_INITIALIZING:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
- &(adapter->status));
- break;
-
- case FSF_PROT_DUPLICATE_REQUEST_ID:
- dev_err(&adapter->ccw_device->dev,
- "The request identifier 0x%Lx is ambiguous.\n",
- (unsigned long long)qtcb->bottom.support.req_handle);
- zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PROT_LINK_DOWN:
- zfcp_fsf_link_down_info_eval(fsf_req, 37,
- &prot_status_qual->link_down_info);
- /* FIXME: reopening adapter now? better wait for link up */
- zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PROT_REEST_QUEUE:
- /* All ports should be marked as ready to run again */
- zfcp_erp_modify_adapter_status(adapter, 28, NULL,
- ZFCP_STATUS_COMMON_RUNNING,
- ZFCP_SET);
- zfcp_erp_adapter_reopen(adapter,
- ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
- | ZFCP_STATUS_COMMON_ERP_FAILED,
- 99, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PROT_ERROR_STATE:
- zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- default:
- dev_err(&adapter->ccw_device->dev,
- "Transfer protocol status information"
- "provided by the adapter (0x%x) "
- "is not compatible with the device driver.\n",
- qtcb->prefix.prot_status);
- zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ list_for_each_entry_safe(req, tmp, &remove_queue, list) {
+ list_del(&req->list);
+ req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+ zfcp_fsf_req_complete(req);
}
-
- 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)
+static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *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:
- dev_err(&fsf_req->adapter->ccw_device->dev,
- "Command issued by the device driver (0x%x) is "
- "not known by the adapter.\n",
- fsf_req->qtcb->header.fsf_command);
- zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_ADAPTER_STATUS_AVAILABLE:
- zfcp_fsf_fsfstatus_qual_eval(fsf_req);
- break;
- }
-
- skip_fsfstatus:
- /*
- * always call specific handlers to give them a chance to do
- * something meaningful even in error cases
- */
- zfcp_fsf_req_dispatch(fsf_req);
+ struct fsf_status_read_buffer *sr_buf = req->data;
+ struct zfcp_adapter *adapter = req->adapter;
+ struct zfcp_port *port;
+ int d_id = sr_buf->d_id & ZFCP_DID_MASK;
+ unsigned long flags;
- return retval;
+ read_lock_irqsave(&zfcp_data.config_lock, flags);
+ list_for_each_entry(port, &adapter->port_list_head, list)
+ if (port->d_id == d_id) {
+ read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+ switch (sr_buf->status_subtype) {
+ case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
+ zfcp_erp_port_reopen(port, 0, 101, req);
+ break;
+ case FSF_STATUS_READ_SUB_ERROR_PORT:
+ zfcp_erp_port_shutdown(port, 0, 122, req);
+ break;
+ }
+ return;
+ }
+ read_unlock_irqrestore(&zfcp_data.config_lock, flags);
}
-/*
- * 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)
+static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req)
{
- int retval = 0;
-
- switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
- case FSF_SQ_FCP_RSP_AVAILABLE:
- break;
- case FSF_SQ_RETRY_IF_POSSIBLE:
- /* The SCSI-stack may now issue retries or escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_SQ_COMMAND_ABORTED:
- /* Carry the aborted state on to upper layer */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_SQ_NO_RECOM:
- dev_err(&fsf_req->adapter->ccw_device->dev,
- "No recommendation could be given for a "
- "problem on the adapter.\n");
- zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- case FSF_SQ_ULP_PROGRAMMING_ERROR:
- 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:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- }
+ struct zfcp_adapter *adapter = req->adapter;
+ struct fsf_status_read_buffer *sr_buf = req->data;
+ struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
- return retval;
+ dev_warn(&adapter->ccw_device->dev,
+ "Warning: bit error threshold data "
+ "received for the adapter: "
+ "link failures = %i, loss of sync errors = %i, "
+ "loss of signal errors = %i, "
+ "primitive sequence errors = %i, "
+ "invalid transmission word errors = %i, "
+ "CRC errors = %i).\n",
+ err->link_failure_error_count,
+ err->loss_of_sync_error_count,
+ err->loss_of_signal_error_count,
+ err->primitive_sequence_error_count,
+ err->invalid_transmission_word_error_count,
+ err->crc_error_count);
+ dev_warn(&adapter->ccw_device->dev,
+ "Additional bit error threshold data of the adapter: "
+ "primitive sequence event time-outs = %i, "
+ "elastic buffer overrun errors = %i, "
+ "advertised receive buffer-to-buffer credit = %i, "
+ "current receice buffer-to-buffer credit = %i, "
+ "advertised transmit buffer-to-buffer credit = %i, "
+ "current transmit buffer-to-buffer credit = %i).\n",
+ err->primitive_sequence_event_timeout_count,
+ err->elastic_buffer_overrun_error_count,
+ err->advertised_receive_b2b_credit,
+ err->current_receive_b2b_credit,
+ err->advertised_transmit_b2b_credit,
+ err->current_transmit_b2b_credit);
}
-/**
- * zfcp_fsf_link_down_info_eval - evaluate link down information block
- */
-static void
-zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id,
- struct fsf_link_down_info *link_down)
+static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
+ struct fsf_link_down_info *link_down)
{
- struct zfcp_adapter *adapter = fsf_req->adapter;
+ struct zfcp_adapter *adapter = req->adapter;
- if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
- &adapter->status))
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
return;
atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
- if (link_down == NULL)
+ if (!link_down)
goto out;
switch (link_down->error_code) {
case FSF_PSQ_LINK_NO_LIGHT:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
- "The local link is down: "
- "no light detected.\n");
+ dev_warn(&req->adapter->ccw_device->dev,
+ "The local link is down: no light detected.\n");
break;
case FSF_PSQ_LINK_WRAP_PLUG:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
- "The local link is down: "
- "wrap plug detected.\n");
+ dev_warn(&req->adapter->ccw_device->dev,
+ "The local link is down: wrap plug detected.\n");
break;
case FSF_PSQ_LINK_NO_FCP:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"adjacent node on link does not support FCP.\n");
break;
case FSF_PSQ_LINK_FIRMWARE_UPDATE:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"firmware update in progress.\n");
break;
case FSF_PSQ_LINK_INVALID_WWPN:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"duplicate or invalid WWPN detected.\n");
break;
case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"no support for NPIV by Fabric.\n");
break;
case FSF_PSQ_LINK_NO_FCP_RESOURCES:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"out of resource in FCP daughtercard.\n");
break;
case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"out of resource in Fabric.\n");
break;
case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link is down: "
"unable to login to Fabric.\n");
break;
case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"WWPN assignment file corrupted on adapter.\n");
break;
case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"Mode table corrupted on adapter.\n");
break;
case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"No WWPN for assignment table on adapter.\n");
break;
default:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The local link to adapter is down.\n");
}
-
- out:
- zfcp_erp_adapter_failed(adapter, id, fsf_req);
+out:
+ zfcp_erp_adapter_failed(adapter, id, req);
}
-/*
- * function: zfcp_fsf_req_dispatch
- *
- * purpose: calls the appropriate command specific handler
- *
- * returns:
- */
-static int
-zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
{
- struct zfcp_erp_action *erp_action = fsf_req->erp_action;
- int retval = 0;
-
-
- switch (fsf_req->fsf_command) {
+ struct zfcp_adapter *adapter = req->adapter;
+ struct fsf_status_read_buffer *sr_buf = req->data;
+ struct fsf_link_down_info *ldi =
+ (struct fsf_link_down_info *) &sr_buf->payload;
- case FSF_QTCB_FCP_CMND:
- zfcp_fsf_send_fcp_command_handler(fsf_req);
+ switch (sr_buf->status_subtype) {
+ case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
+ dev_warn(&adapter->ccw_device->dev,
+ "Physical link is down.\n");
+ zfcp_fsf_link_down_info_eval(req, 38, ldi);
break;
-
- case FSF_QTCB_ABORT_FCP_CMND:
- zfcp_fsf_abort_fcp_command_handler(fsf_req);
+ case FSF_STATUS_READ_SUB_FDISC_FAILED:
+ dev_warn(&adapter->ccw_device->dev,
+ "Local link is down "
+ "due to failed FDISC login.\n");
+ zfcp_fsf_link_down_info_eval(req, 39, ldi);
break;
+ case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
+ dev_warn(&adapter->ccw_device->dev,
+ "Local link is down "
+ "due to firmware update on adapter.\n");
+ zfcp_fsf_link_down_info_eval(req, 40, NULL);
+ };
+}
- case FSF_QTCB_SEND_GENERIC:
- zfcp_fsf_send_ct_handler(fsf_req);
- break;
+static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
+{
+ struct zfcp_adapter *adapter = req->adapter;
+ struct fsf_status_read_buffer *sr_buf = req->data;
- case FSF_QTCB_OPEN_PORT_WITH_DID:
- zfcp_fsf_open_port_handler(fsf_req);
- break;
+ if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
+ zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
+ mempool_free(sr_buf, adapter->pool.data_status_read);
+ zfcp_fsf_req_free(req);
+ return;
+ }
- case FSF_QTCB_OPEN_LUN:
- zfcp_fsf_open_unit_handler(fsf_req);
- break;
+ zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
- case FSF_QTCB_CLOSE_LUN:
- zfcp_fsf_close_unit_handler(fsf_req);
+ switch (sr_buf->status_type) {
+ case FSF_STATUS_READ_PORT_CLOSED:
+ zfcp_fsf_status_read_port_closed(req);
break;
-
- case FSF_QTCB_CLOSE_PORT:
- zfcp_fsf_close_port_handler(fsf_req);
+ case FSF_STATUS_READ_INCOMING_ELS:
+ zfcp_fc_incoming_els(req);
break;
-
- case FSF_QTCB_CLOSE_PHYSICAL_PORT:
- zfcp_fsf_close_physical_port_handler(fsf_req);
+ case FSF_STATUS_READ_SENSE_DATA_AVAIL:
break;
-
- case FSF_QTCB_EXCHANGE_CONFIG_DATA:
- zfcp_fsf_exchange_config_data_handler(fsf_req);
+ case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
+ zfcp_fsf_bit_error_threshold(req);
break;
-
- case FSF_QTCB_EXCHANGE_PORT_DATA:
- zfcp_fsf_exchange_port_data_handler(fsf_req);
+ case FSF_STATUS_READ_LINK_DOWN:
+ zfcp_fsf_status_read_link_down(req);
break;
-
- case FSF_QTCB_SEND_ELS:
- zfcp_fsf_send_els_handler(fsf_req);
+ case FSF_STATUS_READ_LINK_UP:
+ dev_info(&adapter->ccw_device->dev,
+ "Local link was replugged.\n");
+ /* All ports should be marked as ready to run again */
+ zfcp_erp_modify_adapter_status(adapter, 30, NULL,
+ ZFCP_STATUS_COMMON_RUNNING,
+ ZFCP_SET);
+ zfcp_erp_adapter_reopen(adapter,
+ ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
+ ZFCP_STATUS_COMMON_ERP_FAILED,
+ 102, req);
break;
-
- case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
- zfcp_fsf_control_file_handler(fsf_req);
+ case FSF_STATUS_READ_NOTIFICATION_LOST:
+ if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
+ zfcp_erp_adapter_access_changed(adapter, 135, req);
+ if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
+ schedule_work(&adapter->scan_work);
break;
-
- case FSF_QTCB_UPLOAD_CONTROL_FILE:
- zfcp_fsf_control_file_handler(fsf_req);
+ case FSF_STATUS_READ_CFDC_UPDATED:
+ zfcp_erp_adapter_access_changed(adapter, 136, req);
+ break;
+ case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
+ adapter->adapter_features = sr_buf->payload.word[0];
break;
}
- if (!erp_action)
- return retval;
+ mempool_free(sr_buf, adapter->pool.data_status_read);
+ zfcp_fsf_req_free(req);
- zfcp_erp_async_handler(erp_action, 0);
+ atomic_inc(&adapter->stat_miss);
+ schedule_work(&adapter->stat_work);
+}
- return retval;
+static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
+{
+ switch (req->qtcb->header.fsf_status_qual.word[0]) {
+ case FSF_SQ_FCP_RSP_AVAILABLE:
+ case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
+ case FSF_SQ_NO_RETRY_POSSIBLE:
+ case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
+ return;
+ case FSF_SQ_COMMAND_ABORTED:
+ req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
+ break;
+ case FSF_SQ_NO_RECOM:
+ dev_err(&req->adapter->ccw_device->dev,
+ "No recommendation could be given for a "
+ "problem on the adapter.\n");
+ zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
+ break;
+ }
+ /* all non-return stats set FSFREQ_ERROR*/
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
-/*
- * 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)
+static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
{
- 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;
+ if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
+ return;
- /* 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)
- goto failed_req_create;
-
- sbale = zfcp_qdio_sbale_req(fsf_req);
- sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
- sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
- fsf_req->sbale_curr = 2;
-
- retval = -ENOMEM;
- status_buffer =
- mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
- if (!status_buffer)
- goto failed_buf;
- memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
- fsf_req->data = (unsigned long) status_buffer;
+ switch (req->qtcb->header.fsf_status) {
+ case FSF_UNKNOWN_COMMAND:
+ dev_err(&req->adapter->ccw_device->dev,
+ "Command issued by the device driver (0x%x) is "
+ "not known by the adapter.\n",
+ req->qtcb->header.fsf_command);
+ zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ break;
+ case FSF_ADAPTER_STATUS_AVAILABLE:
+ zfcp_fsf_fsfstatus_qual_eval(req);
+ break;
+ }
+}
- /* 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);
+static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
+{
+ struct zfcp_adapter *adapter = req->adapter;
+ struct fsf_qtcb *qtcb = req->qtcb;
+ union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
- retval = zfcp_fsf_req_send(fsf_req);
- if (retval)
- goto failed_req_send;
+ zfcp_hba_dbf_event_fsf_response(req);
- goto out;
+ if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
+ return;
+ }
+
+ switch (qtcb->prefix.prot_status) {
+ case FSF_PROT_GOOD:
+ case FSF_PROT_FSF_STATUS_PRESENTED:
+ return;
+ case FSF_PROT_QTCB_VERSION_ERROR:
+ dev_err(&adapter->ccw_device->dev,
+ "The QTCB version requested by zfcp (0x%x) is not "
+ "supported by the FCP adapter (lowest supported "
+ "0x%x, highest supported 0x%x).\n",
+ FSF_QTCB_CURRENT_VERSION, psq->word[0],
+ psq->word[1]);
+ zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
+ break;
+ case FSF_PROT_ERROR_STATE:
+ case FSF_PROT_SEQ_NUMB_ERROR:
+ zfcp_erp_adapter_reopen(adapter, 0, 98, req);
+ req->status |= ZFCP_STATUS_FSFREQ_RETRY;
+ break;
+ case FSF_PROT_UNSUPP_QTCB_TYPE:
+ dev_err(&adapter->ccw_device->dev,
+ "Packet header type used by the device driver is "
+ "incompatible with that used on the adapter.\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
+ break;
+ case FSF_PROT_HOST_CONNECTION_INITIALIZING:
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+ &adapter->status);
+ break;
+ case FSF_PROT_DUPLICATE_REQUEST_ID:
+ dev_err(&adapter->ccw_device->dev,
+ "The request identifier 0x%Lx is ambiguous.\n",
+ (unsigned long long)qtcb->bottom.support.req_handle);
+ zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
+ break;
+ case FSF_PROT_LINK_DOWN:
+ zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
+ /* FIXME: reopening adapter now? better wait for link up */
+ zfcp_erp_adapter_reopen(adapter, 0, 79, req);
+ break;
+ case FSF_PROT_REEST_QUEUE:
+ /* All ports should be marked as ready to run again */
+ zfcp_erp_modify_adapter_status(adapter, 28, NULL,
+ ZFCP_STATUS_COMMON_RUNNING,
+ ZFCP_SET);
+ zfcp_erp_adapter_reopen(adapter,
+ ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
+ ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
+ break;
+ default:
+ dev_err(&adapter->ccw_device->dev,
+ "Transfer protocol status information"
+ "provided by the adapter (0x%x) "
+ "is not compatible with the device driver.\n",
+ qtcb->prefix.prot_status);
+ zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
+ }
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+}
- failed_req_send:
- mempool_free(status_buffer, adapter->pool.data_status_read);
+/**
+ * zfcp_fsf_req_complete - process completion of a FSF request
+ * @fsf_req: The FSF request that has been completed.
+ *
+ * When a request has been completed either from the FCP adapter,
+ * or it has been dismissed due to a queue shutdown, this function
+ * is called to process the completion status and trigger further
+ * events related to the FSF request.
+ */
+void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
+{
+ if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
+ zfcp_fsf_status_read_handler(req);
+ return;
+ }
- failed_buf:
- zfcp_fsf_req_free(fsf_req);
- failed_req_create:
- zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
- out:
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return retval;
+ del_timer(&req->timer);
+ zfcp_fsf_protstatus_eval(req);
+ zfcp_fsf_fsfstatus_eval(req);
+ req->handler(req);
+
+ if (req->erp_action)
+ zfcp_erp_async_handler(req->erp_action, 0);
+ req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
+
+ if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
+ zfcp_fsf_req_free(req);
+ else
+ /* notify initiator waiting for the requests completion */
+ /*
+ * FIXME: Race! We must not access fsf_req here as it might have been
+ * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
+ * flag. It's an improbable case. But, we have the same paranoia for
+ * the cleanup flag already.
+ * Might better be handled using complete()?
+ * (setting the flag and doing wakeup ought to be atomic
+ * with regard to checking the flag as long as waitqueue is
+ * part of the to be released structure)
+ */
+ wake_up(&req->completion_wq);
}
-static int
-zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
+static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
{
- struct fsf_status_read_buffer *status_buffer;
- struct zfcp_adapter *adapter;
- struct zfcp_port *port;
- unsigned long flags;
+ struct fsf_qtcb_bottom_config *bottom;
+ struct zfcp_adapter *adapter = req->adapter;
+ struct Scsi_Host *shost = adapter->scsi_host;
- status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
- adapter = fsf_req->adapter;
+ bottom = &req->qtcb->bottom.config;
- 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 (req->data)
+ memcpy(req->data, bottom, sizeof(*bottom));
- if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK)))
- goto out;
+ fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
+ fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
+ fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
+ fc_host_speed(shost) = bottom->fc_link_speed;
+ fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
- switch (status_buffer->status_subtype) {
+ adapter->hydra_version = bottom->adapter_type;
+ adapter->timer_ticks = bottom->timer_interval;
- case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
- zfcp_erp_port_reopen(port, 0, 101, fsf_req);
- break;
+ if (fc_host_permanent_port_name(shost) == -1)
+ fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
- case FSF_STATUS_READ_SUB_ERROR_PORT:
- zfcp_erp_port_shutdown(port, 0, 122, fsf_req);
+ switch (bottom->fc_topology) {
+ case FSF_TOPO_P2P:
+ adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
+ adapter->peer_wwpn = bottom->plogi_payload.wwpn;
+ adapter->peer_wwnn = bottom->plogi_payload.wwnn;
+ fc_host_port_type(shost) = FC_PORTTYPE_PTP;
+ if (req->erp_action)
+ dev_info(&adapter->ccw_device->dev,
+ "Point-to-Point fibrechannel "
+ "configuration detected.\n");
+ break;
+ case FSF_TOPO_FABRIC:
+ fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
+ if (req->erp_action)
+ dev_info(&adapter->ccw_device->dev,
+ "Switched fabric fibrechannel "
+ "network detected.\n");
break;
+ case FSF_TOPO_AL:
+ fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
+ dev_err(&adapter->ccw_device->dev,
+ "Unsupported arbitrated loop fibrechannel "
+ "topology detected, shutting down "
+ "adapter.\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
+ return -EIO;
+ default:
+ fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
+ dev_err(&adapter->ccw_device->dev,
+ "The fibrechannel topology reported by the"
+ " adapter is not known by the zfcp driver,"
+ " shutting down adapter.\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 128, req);
+ return -EIO;
}
- out:
+
return 0;
}
-static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req)
+static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
- struct fsf_status_read_buffer *buf =
- (struct fsf_status_read_buffer *) req->data;
- struct fsf_bit_error_payload *err =
- (struct fsf_bit_error_payload *) buf->payload;
- dev_warn(&adapter->ccw_device->dev,
- "Warning: bit error threshold data "
- "received for the adapter: "
- "link failures = %i, loss of sync errors = %i, "
- "loss of signal errors = %i, "
- "primitive sequence errors = %i, "
- "invalid transmission word errors = %i, "
- "CRC errors = %i).\n",
- err->link_failure_error_count,
- err->loss_of_sync_error_count,
- err->loss_of_signal_error_count,
- err->primitive_sequence_error_count,
- err->invalid_transmission_word_error_count,
- err->crc_error_count);
- dev_warn(&adapter->ccw_device->dev,
- "Additional bit error threshold data of the adapter: "
- "primitive sequence event time-outs = %i, "
- "elastic buffer overrun errors = %i, "
- "advertised receive buffer-to-buffer credit = %i, "
- "current receice buffer-to-buffer credit = %i, "
- "advertised transmit buffer-to-buffer credit = %i, "
- "current transmit buffer-to-buffer credit = %i).\n",
- err->primitive_sequence_event_timeout_count,
- err->elastic_buffer_overrun_error_count,
- err->advertised_receive_b2b_credit,
- err->current_receive_b2b_credit,
- err->advertised_transmit_b2b_credit,
- err->current_transmit_b2b_credit);
-}
-
-/*
- * function: zfcp_fsf_status_read_handler
- *
- * purpose: is called for finished Open Port command
- *
- * returns:
- */
-static int
-zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
-{
- int retval = 0;
- struct zfcp_adapter *adapter = fsf_req->adapter;
- struct fsf_status_read_buffer *status_buffer =
- (struct fsf_status_read_buffer *) fsf_req->data;
+ struct fsf_qtcb *qtcb = req->qtcb;
+ struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
+ struct Scsi_Host *shost = adapter->scsi_host;
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
- zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
- mempool_free(status_buffer, adapter->pool.data_status_read);
- zfcp_fsf_req_free(fsf_req);
- goto out;
- }
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
+ return;
- zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
+ adapter->fsf_lic_version = bottom->lic_version;
+ adapter->adapter_features = bottom->adapter_features;
+ adapter->connection_features = bottom->connection_features;
+ adapter->peer_wwpn = 0;
+ adapter->peer_wwnn = 0;
+ adapter->peer_d_id = 0;
- switch (status_buffer->status_type) {
+ switch (qtcb->header.fsf_status) {
+ case FSF_GOOD:
+ if (zfcp_fsf_exchange_config_evaluate(req))
+ return;
- case FSF_STATUS_READ_PORT_CLOSED:
- zfcp_fsf_status_read_port_closed(fsf_req);
+ if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
+ dev_err(&adapter->ccw_device->dev,
+ "Maximum QTCB size (%d bytes) allowed by "
+ "the adapter is lower than the minimum "
+ "required by the driver (%ld bytes).\n",
+ bottom->max_qtcb_size,
+ sizeof(struct fsf_qtcb));
+ zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
+ return;
+ }
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
+ &adapter->status);
break;
+ case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
+ fc_host_node_name(shost) = 0;
+ fc_host_port_name(shost) = 0;
+ fc_host_port_id(shost) = 0;
+ fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
+ fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
+ adapter->hydra_version = 0;
- case FSF_STATUS_READ_INCOMING_ELS:
- zfcp_fc_incoming_els(fsf_req);
- break;
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
+ &adapter->status);
- case FSF_STATUS_READ_SENSE_DATA_AVAIL:
+ zfcp_fsf_link_down_info_eval(req, 42,
+ &qtcb->header.fsf_status_qual.link_down_info);
break;
+ default:
+ zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
+ return;
+ }
- case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
- zfcp_fsf_bit_error_threshold(fsf_req);
- break;
+ if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
+ adapter->hardware_version = bottom->hardware_version;
+ memcpy(fc_host_serial_number(shost), bottom->serial_number,
+ min(FC_SERIAL_NUMBER_SIZE, 17));
+ EBCASC(fc_host_serial_number(shost),
+ min(FC_SERIAL_NUMBER_SIZE, 17));
+ }
- case FSF_STATUS_READ_LINK_DOWN:
- switch (status_buffer->status_subtype) {
- case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
- dev_warn(&adapter->ccw_device->dev,
- "Physical link is down.\n");
- zfcp_fsf_link_down_info_eval(fsf_req, 38,
- (struct fsf_link_down_info *)
- &status_buffer->payload);
- break;
- case FSF_STATUS_READ_SUB_FDISC_FAILED:
- dev_warn(&adapter->ccw_device->dev,
- "Local link is down "
- "due to failed FDISC login.\n");
- zfcp_fsf_link_down_info_eval(fsf_req, 39,
- (struct fsf_link_down_info *)
- &status_buffer->payload);
- break;
- case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
- dev_warn(&adapter->ccw_device->dev,
- "Local link is down "
- "due to firmware update on adapter.\n");
- zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL);
- break;
- default:
- dev_warn(&adapter->ccw_device->dev,
- "Local link is down.\n");
- zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL);
- };
- break;
+ if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
+ dev_err(&adapter->ccw_device->dev,
+ "The adapter only supports newer control block "
+ "versions, try updated device driver.\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
+ return;
+ }
+ if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
+ dev_err(&adapter->ccw_device->dev,
+ "The adapter only supports older control block "
+ "versions, consider a microcode upgrade.\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
+ }
+}
- case FSF_STATUS_READ_LINK_UP:
- dev_info(&adapter->ccw_device->dev,
- "Local link was replugged.\n");
- /* All ports should be marked as ready to run again */
- zfcp_erp_modify_adapter_status(adapter, 30, NULL,
- ZFCP_STATUS_COMMON_RUNNING,
- ZFCP_SET);
- zfcp_erp_adapter_reopen(adapter,
- ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
- | ZFCP_STATUS_COMMON_ERP_FAILED,
- 102, fsf_req);
- break;
+static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
+{
+ struct zfcp_adapter *adapter = req->adapter;
+ struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
+ struct Scsi_Host *shost = adapter->scsi_host;
- case FSF_STATUS_READ_NOTIFICATION_LOST:
- if (status_buffer->status_subtype &
- FSF_STATUS_READ_SUB_ACT_UPDATED)
- zfcp_erp_adapter_access_changed(adapter, 135, fsf_req);
- if (status_buffer->status_subtype &
- FSF_STATUS_READ_SUB_INCOMING_ELS)
- schedule_work(&adapter->scan_work);
- break;
+ if (req->data)
+ memcpy(req->data, bottom, sizeof(*bottom));
- case FSF_STATUS_READ_CFDC_UPDATED:
- zfcp_erp_adapter_access_changed(adapter, 136, fsf_req);
- break;
+ if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
+ fc_host_permanent_port_name(shost) = bottom->wwpn;
+ else
+ fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
+ fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
+ fc_host_supported_speeds(shost) = bottom->supported_speed;
+}
- case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
- adapter->adapter_features = *(u32*) status_buffer->payload;
+static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
+{
+ struct zfcp_adapter *adapter = req->adapter;
+ struct fsf_qtcb *qtcb = req->qtcb;
+
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
+ return;
+
+ switch (qtcb->header.fsf_status) {
+ case FSF_GOOD:
+ zfcp_fsf_exchange_port_evaluate(req);
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
+ break;
+ case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
+ zfcp_fsf_exchange_port_evaluate(req);
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
+ zfcp_fsf_link_down_info_eval(req, 43,
+ &qtcb->header.fsf_status_qual.link_down_info);
break;
}
- mempool_free(status_buffer, adapter->pool.data_status_read);
- zfcp_fsf_req_free(fsf_req);
- /*
- * recycle buffer and start new request repeat until outbound
- * queue is empty or adapter shutdown is requested
- */
- /*
- * FIXME(qdio):
- * we may wait in the req_create for 5s during shutdown, so
- * qdio_cleanup will have to wait at least that long before returning
- * with failure to allow us a proper cleanup under all circumstances
- */
- /*
- * FIXME:
- * allocation failure possible? (Is this code needed?)
- */
+}
- atomic_inc(&adapter->stat_miss);
- schedule_work(&adapter->stat_work);
- out:
- return retval;
+static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
+{
+ spin_lock(&queue->lock);
+ if (atomic_read(&queue->count))
+ return 1;
+ spin_unlock(&queue->lock);
+ return 0;
}
-/*
- * 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)
+static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
+{
+ long ret;
+ struct zfcp_qdio_queue *req_q = &adapter->req_q;
+
+ spin_unlock(&req_q->lock);
+ ret = wait_event_interruptible_timeout(adapter->request_wq,
+ zfcp_fsf_sbal_check(req_q), 5 * HZ);
+ if (ret > 0)
+ return 0;
+
+ spin_lock(&req_q->lock);
+ return -EIO;
+}
+
+static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
+{
+ struct zfcp_fsf_req *req;
+ req = mempool_alloc(pool, GFP_ATOMIC);
+ if (!req)
+ return NULL;
+ memset(req, 0, sizeof(*req));
+ return req;
+}
+
+static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
+{
+ struct zfcp_fsf_req_qtcb *qtcb;
+
+ if (likely(pool))
+ qtcb = mempool_alloc(pool, GFP_ATOMIC);
+ else
+ qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
+ GFP_ATOMIC);
+ if (unlikely(!qtcb))
+ return NULL;
+
+ memset(qtcb, 0, sizeof(*qtcb));
+ qtcb->fsf_req.qtcb = &qtcb->qtcb;
+ qtcb->fsf_req.pool = pool;
+
+ return &qtcb->fsf_req;
+}
+
+static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
+ u32 fsf_cmd, int req_flags,
+ mempool_t *pool)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req = NULL;
- unsigned long lock_flags;
- int retval = 0;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
- req_flags, adapter->pool.fsf_req_abort,
- &lock_flags, &fsf_req);
- if (retval < 0)
- goto out;
-
- if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
- &unit->status)))
- goto unit_blocked;
- sbale = zfcp_qdio_sbale_req(fsf_req);
- sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
- sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+ struct zfcp_fsf_req *req;
+ struct zfcp_qdio_queue *req_q = &adapter->req_q;
+
+ if (req_flags & ZFCP_REQ_NO_QTCB)
+ req = zfcp_fsf_alloc_noqtcb(pool);
+ else
+ req = zfcp_fsf_alloc_qtcb(pool);
- fsf_req->data = (unsigned long) unit;
+ if (unlikely(!req))
+ return ERR_PTR(-EIO);
- /* 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;
+ if (adapter->req_no == 0)
+ adapter->req_no++;
- /* set handle of request which should be aborted */
- fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
+ INIT_LIST_HEAD(&req->list);
+ init_timer(&req->timer);
+ init_waitqueue_head(&req->completion_wq);
+
+ req->adapter = adapter;
+ req->fsf_command = fsf_cmd;
+ req->req_id = adapter->req_no++;
+ req->sbal_number = 1;
+ req->sbal_first = req_q->first;
+ req->sbal_last = req_q->first;
+ req->sbale_curr = 1;
- zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
- retval = zfcp_fsf_req_send(fsf_req);
- if (!retval)
- goto out;
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].addr = (void *) req->req_id;
+ sbale[0].flags |= SBAL_FLAGS0_COMMAND;
- unit_blocked:
- zfcp_fsf_req_free(fsf_req);
- fsf_req = NULL;
+ if (likely(req->qtcb)) {
+ req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
+ req->qtcb->prefix.req_id = req->req_id;
+ req->qtcb->prefix.ulp_info = 26;
+ req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
+ req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
+ req->qtcb->header.req_handle = req->req_id;
+ req->qtcb->header.fsf_command = req->fsf_command;
+ req->seq_no = adapter->fsf_req_seq_no;
+ req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
+ sbale[1].addr = (void *) req->qtcb;
+ sbale[1].length = sizeof(struct fsf_qtcb);
+ }
+
+ if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
+ zfcp_fsf_req_free(req);
+ return ERR_PTR(-EIO);
+ }
+
+ if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
+ req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
- out:
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return fsf_req;
+ return req;
}
-/*
- * function: zfcp_fsf_abort_fcp_command_handler
- *
- * purpose: is called for finished Abort FCP Command request
- *
- * returns:
+static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
+{
+ struct zfcp_adapter *adapter = req->adapter;
+ struct zfcp_qdio_queue *req_q = &adapter->req_q;
+ int idx;
+
+ /* put allocated FSF request into hash table */
+ spin_lock(&adapter->req_list_lock);
+ idx = zfcp_reqlist_hash(req->req_id);
+ list_add_tail(&req->list, &adapter->req_list[idx]);
+ spin_unlock(&adapter->req_list_lock);
+
+ req->issued = get_clock();
+ if (zfcp_qdio_send(req)) {
+ /* Queues are down..... */
+ del_timer(&req->timer);
+ spin_lock(&adapter->req_list_lock);
+ zfcp_reqlist_remove(adapter, req);
+ spin_unlock(&adapter->req_list_lock);
+ /* undo changes in request queue made for this request */
+ atomic_add(req->sbal_number, &req_q->count);
+ req_q->first -= req->sbal_number;
+ req_q->first += QDIO_MAX_BUFFERS_PER_Q;
+ req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
+ zfcp_erp_adapter_reopen(adapter, 0, 116, req);
+ return -EIO;
+ }
+
+ /* Don't increase for unsolicited status */
+ if (req->qtcb)
+ adapter->fsf_req_seq_no++;
+
+ return 0;
+}
+
+/**
+ * zfcp_fsf_status_read - send status read request
+ * @adapter: pointer to struct zfcp_adapter
+ * @req_flags: request flags
+ * Returns: 0 on success, ERROR otherwise
*/
-static int
-zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
+int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
{
- int retval = -EINVAL;
- struct zfcp_unit *unit;
- union fsf_status_qual *fsf_stat_qual =
- &new_fsf_req->qtcb->header.fsf_status_qual;
+ struct zfcp_fsf_req *req;
+ struct fsf_status_read_buffer *sr_buf;
+ volatile struct qdio_buffer_element *sbale;
+ int retval = -EIO;
- if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
- goto skip_fsfstatus;
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
+
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
+ ZFCP_REQ_NO_QTCB,
+ adapter->pool.fsf_req_status_read);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
}
- unit = (struct zfcp_unit *) new_fsf_req->data;
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
+ sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
+ req->sbale_curr = 2;
- /* evaluate FSF status in QTCB */
- switch (new_fsf_req->qtcb->header.fsf_status) {
+ sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
+ if (!sr_buf) {
+ retval = -ENOMEM;
+ goto failed_buf;
+ }
+ memset(sr_buf, 0, sizeof(*sr_buf));
+ req->data = sr_buf;
+ sbale = zfcp_qdio_sbale_curr(req);
+ sbale->addr = (void *) sr_buf;
+ sbale->length = sizeof(*sr_buf);
+ retval = zfcp_fsf_req_send(req);
+ if (retval)
+ goto failed_req_send;
+
+ goto out;
+
+failed_req_send:
+ mempool_free(sr_buf, adapter->pool.data_status_read);
+failed_buf:
+ zfcp_fsf_req_free(req);
+ zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return retval;
+}
+
+static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
+{
+ struct zfcp_unit *unit = req->data;
+ union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
+
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
+ return;
+
+ switch (req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
- if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
- /*
- * In this case a command that was sent prior to a port
- * reopen was aborted (handles are different). This is
- * fine.
- */
- } else {
- /* Let's hope this sorts out the mess */
+ if (fsq->word[0] == fsq->word[1]) {
zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
- new_fsf_req);
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
-
case FSF_LUN_HANDLE_NOT_VALID:
- if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
- /*
- * In this case a command that was sent prior to a unit
- * reopen was aborted (handles are different).
- * This is fine.
- */
- } else {
- /* Let's hope this sorts out the mess */
- zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req);
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ if (fsq->word[0] == fsq->word[1]) {
+ zfcp_erp_port_reopen(unit->port, 0, 105, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
break;
-
case FSF_FCP_COMMAND_DOES_NOT_EXIST:
- retval = 0;
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
+ req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
break;
-
case FSF_PORT_BOXED:
- zfcp_erp_port_boxed(unit->port, 47, new_fsf_req);
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
- | ZFCP_STATUS_FSFREQ_RETRY;
+ zfcp_erp_port_boxed(unit->port, 47, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
break;
-
case FSF_LUN_BOXED:
- zfcp_erp_unit_boxed(unit, 48, new_fsf_req);
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
- | ZFCP_STATUS_FSFREQ_RETRY;
+ zfcp_erp_unit_boxed(unit, 48, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
- switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
+ switch (fsq->word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
zfcp_test_link(unit->port);
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* SCSI stack will escalate */
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
-
case FSF_GOOD:
- retval = 0;
- new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
+ req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
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.
+ * zfcp_fsf_abort_fcp_command - abort running SCSI command
+ * @old_req_id: unsigned long
+ * @adapter: pointer to struct zfcp_adapter
+ * @unit: pointer to struct zfcp_unit
+ * @req_flags: integer specifying the request flags
+ * Returns: pointer to struct zfcp_fsf_req
+ *
+ * FIXME(design): should be watched by a timeout !!!
*/
-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)
+struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
+ struct zfcp_adapter *adapter,
+ struct zfcp_unit *unit,
+ int req_flags)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_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)
- goto failed_req;
-
- sbale = zfcp_qdio_sbale_req(fsf_req);
- if (zfcp_use_one_sbal(ct->req, ct->req_count,
- ct->resp, ct->resp_count)){
- /* both request buffer and response buffer
- fit into one sbale each */
- sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
- sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
- sbale[2].length = ct->req[0].length;
- sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
- sbale[3].length = ct->resp[0].length;
- sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
- } else if (adapter->adapter_features &
- FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
- /* try to use chained SBALs */
- bytes = zfcp_qdio_sbals_from_sg(fsf_req,
- SBAL_FLAGS0_TYPE_WRITE_READ,
- ct->req,
- ZFCP_MAX_SBALS_PER_CT_REQ);
- if (bytes <= 0) {
- 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,
- ZFCP_MAX_SBALS_PER_CT_REQ);
- if (bytes <= 0) {
- if (bytes == 0)
- ret = -ENOMEM;
- else
- ret = bytes;
+ struct zfcp_fsf_req *req = NULL;
- goto failed_send;
- }
- fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
- } else {
- /* reject send generic request */
- ret = -EOPNOTSUPP;
- goto failed_send;
- }
-
- /* settings in QTCB */
- fsf_req->qtcb->header.port_handle = port->handle;
- fsf_req->qtcb->bottom.support.service_class =
- ZFCP_FC_SERVICE_CLASS_DEFAULT;
- fsf_req->qtcb->bottom.support.timeout = ct->timeout;
- fsf_req->data = (unsigned long) ct;
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
+ req_flags, adapter->pool.fsf_req_abort);
+ if (unlikely(IS_ERR(req)))
+ goto out;
- zfcp_san_dbf_event_ct_request(fsf_req);
+ if (unlikely(!(atomic_read(&unit->status) &
+ ZFCP_STATUS_COMMON_UNBLOCKED)))
+ goto out_error_free;
- if (erp_action) {
- erp_action->fsf_req = fsf_req;
- fsf_req->erp_action = erp_action;
- zfcp_erp_start_timer(fsf_req);
- } else
- zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
+ sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- ret = zfcp_fsf_req_send(fsf_req);
- if (ret)
- goto failed_send;
+ req->data = unit;
+ req->handler = zfcp_fsf_abort_fcp_command_handler;
+ req->qtcb->header.lun_handle = unit->handle;
+ req->qtcb->header.port_handle = unit->port->handle;
+ req->qtcb->bottom.support.req_handle = (u64) old_req_id;
- goto out;
+ zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
+ if (!zfcp_fsf_req_send(req))
+ 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->req_q.lock, lock_flags);
- return ret;
+out_error_free:
+ zfcp_fsf_req_free(req);
+ req = NULL;
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return req;
}
-/**
- * zfcp_fsf_send_ct_handler - handler for Generic Service requests
- * @fsf_req: pointer to struct zfcp_fsf_req
- *
- * Data specific for the Generic Service request is passed using
- * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
- * Usually a specific handler for the CT request is called which is
- * found in this structure.
- */
-static int
-zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *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;
+ struct zfcp_adapter *adapter = req->adapter;
+ struct zfcp_send_ct *send_ct = req->data;
+ struct zfcp_port *port = send_ct->port;
+ struct fsf_qtcb_header *header = &req->qtcb->header;
- adapter = fsf_req->adapter;
- send_ct = (struct zfcp_send_ct *) fsf_req->data;
- port = send_ct->port;
- header = &fsf_req->qtcb->header;
- bottom = &fsf_req->qtcb->bottom.support;
+ send_ct->status = -EINVAL;
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
- /* evaluate FSF status in QTCB */
switch (header->fsf_status) {
-
case FSF_GOOD:
- zfcp_san_dbf_event_ct_response(fsf_req);
- retval = 0;
+ zfcp_san_dbf_event_ct_response(req);
+ send_ct->status = 0;
break;
-
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
- zfcp_fsf_class_not_supp(fsf_req);
+ zfcp_fsf_class_not_supp(req);
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
- /* reopening link to port */
zfcp_test_link(port);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* ERP strategy will escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
-
case FSF_ACCESS_DENIED:
- zfcp_fsf_access_denied_port(fsf_req, port);
- break;
-
- case FSF_GENERIC_COMMAND_REJECTED:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_fsf_access_denied_port(req, port);
break;
-
- case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
case FSF_PORT_BOXED:
- zfcp_erp_port_boxed(port, 49, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
- | ZFCP_STATUS_FSFREQ_RETRY;
+ zfcp_erp_port_boxed(port, 49, req);
+ 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_PORT_HANDLE_NOT_VALID:
+ zfcp_erp_adapter_reopen(adapter, 0, 106, req);
+ case FSF_GENERIC_COMMAND_REJECTED:
case FSF_PAYLOAD_SIZE_MISMATCH:
case FSF_REQUEST_SIZE_TOO_LARGE:
case FSF_RESPONSE_SIZE_TOO_LARGE:
case FSF_SBAL_MISMATCH:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- default:
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
skip_fsfstatus:
- send_ct->status = retval;
-
- if (send_ct->handler != NULL)
+ if (send_ct->handler)
send_ct->handler(send_ct->handler_data);
+}
- return retval;
+static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
+ struct scatterlist *sg_req,
+ struct scatterlist *sg_resp, int max_sbals)
+{
+ int bytes;
+
+ bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
+ sg_req, max_sbals);
+ if (bytes <= 0)
+ return -ENOMEM;
+ req->qtcb->bottom.support.req_buf_length = bytes;
+ req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
+
+ bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
+ sg_resp, max_sbals);
+ if (bytes <= 0)
+ return -ENOMEM;
+ req->qtcb->bottom.support.resp_buf_length = bytes;
+
+ return 0;
}
/**
- * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
- * @els: pointer to struct zfcp_send_els which contains all needed data for
- * the command.
- */
-int
-zfcp_fsf_send_els(struct zfcp_send_els *els)
-{
- volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- u32 d_id;
- struct zfcp_adapter *adapter;
- unsigned long lock_flags;
- int bytes;
- int ret = 0;
+ * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
+ * @ct: pointer to struct zfcp_send_ct with data for request
+ * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
+ * @erp_action: if non-null the Generic Service request sent within ERP
+ */
+int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
+ struct zfcp_erp_action *erp_action)
+{
+ struct zfcp_port *port = ct->port;
+ struct zfcp_adapter *adapter = port->adapter;
+ struct zfcp_fsf_req *req;
+ int ret = -EIO;
- d_id = els->d_id;
- adapter = els->adapter;
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
- ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
- ZFCP_REQ_AUTO_CLEANUP,
- NULL, &lock_flags, &fsf_req);
- if (ret < 0)
- goto failed_req;
-
- if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
- &els->port->status))) {
- ret = -EBUSY;
- goto port_blocked;
- }
-
- sbale = zfcp_qdio_sbale_req(fsf_req);
- if (zfcp_use_one_sbal(els->req, els->req_count,
- els->resp, els->resp_count)){
- /* both request buffer and response buffer
- fit into one sbale each */
- sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
- sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
- sbale[2].length = els->req[0].length;
- sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
- sbale[3].length = els->resp[0].length;
- sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
- } else if (adapter->adapter_features &
- FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
- /* try to use chained SBALs */
- bytes = zfcp_qdio_sbals_from_sg(fsf_req,
- SBAL_FLAGS0_TYPE_WRITE_READ,
- els->req,
- ZFCP_MAX_SBALS_PER_ELS_REQ);
- if (bytes <= 0) {
- 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,
- ZFCP_MAX_SBALS_PER_ELS_REQ);
- if (bytes <= 0) {
- if (bytes == 0) {
- ret = -ENOMEM;
- } else {
- ret = bytes;
- }
- goto failed_send;
- }
- fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
- } else {
- /* reject request */
- ret = -EOPNOTSUPP;
- goto failed_send;
- }
-
- /* settings in QTCB */
- fsf_req->qtcb->bottom.support.d_id = d_id;
- fsf_req->qtcb->bottom.support.service_class =
- ZFCP_FC_SERVICE_CLASS_DEFAULT;
- fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
- fsf_req->data = (unsigned long) els;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
+ ZFCP_REQ_AUTO_CLEANUP, pool);
+ if (unlikely(IS_ERR(req))) {
+ ret = PTR_ERR(req);
+ goto out;
+ }
+
+ ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
+ FSF_MAX_SBALS_PER_REQ);
+ if (ret)
+ goto failed_send;
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ req->handler = zfcp_fsf_send_ct_handler;
+ req->qtcb->header.port_handle = port->handle;
+ req->qtcb->bottom.support.service_class = FSF_CLASS_3;
+ req->qtcb->bottom.support.timeout = ct->timeout;
+ req->data = ct;
- zfcp_san_dbf_event_els_request(fsf_req);
+ zfcp_san_dbf_event_ct_request(req);
+
+ if (erp_action) {
+ erp_action->fsf_req = req;
+ req->erp_action = erp_action;
+ zfcp_erp_start_timer(req);
+ } else
+ zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
- zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
- ret = zfcp_fsf_req_send(fsf_req);
+ ret = zfcp_fsf_req_send(req);
if (ret)
goto failed_send;
goto out;
- port_blocked:
- failed_send:
- zfcp_fsf_req_free(fsf_req);
-
- failed_req:
- out:
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-
- return ret;
+failed_send:
+ zfcp_fsf_req_free(req);
+ if (erp_action)
+ erp_action->fsf_req = NULL;
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return ret;
}
-/**
- * zfcp_fsf_send_els_handler - handler for ELS commands
- * @fsf_req: pointer to struct zfcp_fsf_req
- *
- * Data specific for the ELS command is passed using
- * fsf_req->data. There we find the pointer to struct zfcp_send_els.
- * Usually a specific handler for the ELS command is called which is
- * found in this structure.
- */
-static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
{
- struct zfcp_adapter *adapter;
- struct zfcp_port *port;
- u32 d_id;
- struct fsf_qtcb_header *header;
- struct fsf_qtcb_bottom_support *bottom;
- struct zfcp_send_els *send_els;
- int retval = -EINVAL;
+ struct zfcp_send_els *send_els = req->data;
+ struct zfcp_port *port = send_els->port;
+ struct fsf_qtcb_header *header = &req->qtcb->header;
- send_els = (struct zfcp_send_els *) fsf_req->data;
- adapter = send_els->adapter;
- port = send_els->port;
- d_id = send_els->d_id;
- header = &fsf_req->qtcb->header;
- bottom = &fsf_req->qtcb->bottom.support;
+ send_els->status = -EINVAL;
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
switch (header->fsf_status) {
-
case FSF_GOOD:
- zfcp_san_dbf_event_els_response(fsf_req);
- retval = 0;
+ zfcp_san_dbf_event_els_response(req);
+ send_els->status = 0;
break;
-
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
- zfcp_fsf_class_not_supp(fsf_req);
+ zfcp_fsf_class_not_supp(req);
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
if (port && (send_els->ls_code != ZFCP_LS_ADISC))
zfcp_test_link(port);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
+ /*fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
case FSF_SQ_RETRY_IF_POSSIBLE:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
-
case FSF_ELS_COMMAND_REJECTED:
case FSF_PAYLOAD_SIZE_MISMATCH:
case FSF_REQUEST_SIZE_TOO_LARGE:
case FSF_RESPONSE_SIZE_TOO_LARGE:
break;
-
+ case FSF_ACCESS_DENIED:
+ zfcp_fsf_access_denied_port(req, port);
+ break;
case FSF_SBAL_MISMATCH:
/* should never occure, avoided in zfcp_fsf_send_els */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ /* fall through */
+ default:
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
+ }
+skip_fsfstatus:
+ if (send_els->handler)
+ send_els->handler(send_els->handler_data);
+}
- case FSF_ACCESS_DENIED:
- zfcp_fsf_access_denied_port(fsf_req, port);
- break;
+/**
+ * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
+ * @els: pointer to struct zfcp_send_els with data for the command
+ */
+int zfcp_fsf_send_els(struct zfcp_send_els *els)
+{
+ struct zfcp_fsf_req *req;
+ struct zfcp_adapter *adapter = els->adapter;
+ struct fsf_qtcb_bottom_support *bottom;
+ int ret = -EIO;
- default:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
+ if (unlikely(!(atomic_read(&els->port->status) &
+ ZFCP_STATUS_COMMON_UNBLOCKED)))
+ return -EBUSY;
+
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
+ ZFCP_REQ_AUTO_CLEANUP, NULL);
+ if (unlikely(IS_ERR(req))) {
+ ret = PTR_ERR(req);
+ goto out;
}
-skip_fsfstatus:
- send_els->status = retval;
+ ret = zfcp_fsf_setup_sbals(req, els->req, els->resp,
+ FSF_MAX_SBALS_PER_ELS_REQ);
+ if (ret)
+ goto failed_send;
+
+ bottom = &req->qtcb->bottom.support;
+ req->handler = zfcp_fsf_send_els_handler;
+ bottom->d_id = els->d_id;
+ bottom->service_class = FSF_CLASS_3;
+ bottom->timeout = 2 * R_A_TOV;
+ req->data = els;
+
+ zfcp_san_dbf_event_els_request(req);
+
+ zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+ ret = zfcp_fsf_req_send(req);
+ if (ret)
+ goto failed_send;
- if (send_els->handler)
- send_els->handler(send_els->handler_data);
+ goto out;
- return retval;
+failed_send:
+ zfcp_fsf_req_free(req);
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return ret;
}
-int
-zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
+ struct zfcp_fsf_req *req;
struct zfcp_adapter *adapter = erp_action->adapter;
- unsigned long lock_flags;
- int retval;
+ int retval = -EIO;
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(adapter,
- FSF_QTCB_EXCHANGE_CONFIG_DATA,
- ZFCP_REQ_AUTO_CLEANUP,
- adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval) {
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return retval;
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+ req = zfcp_fsf_req_create(adapter,
+ FSF_QTCB_EXCHANGE_CONFIG_DATA,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
}
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- fsf_req->qtcb->bottom.config.feature_selection =
+ req->qtcb->bottom.config.feature_selection =
FSF_FEATURE_CFDC |
FSF_FEATURE_LUN_SHARING |
FSF_FEATURE_NOTIFICATION_LOST |
FSF_FEATURE_UPDATE_ALERT;
- fsf_req->erp_action = erp_action;
- erp_action->fsf_req = fsf_req;
+ req->erp_action = erp_action;
+ req->handler = zfcp_fsf_exchange_config_data_handler;
+ erp_action->fsf_req = req;
- zfcp_erp_start_timer(fsf_req);
- retval = zfcp_fsf_req_send(fsf_req);
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
if (retval) {
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
-
+out:
+ spin_unlock(&adapter->req_q.lock);
return retval;
}
-int
-zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
- struct fsf_qtcb_bottom_config *data)
+int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
+ struct fsf_qtcb_bottom_config *data)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
- ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags,
- &fsf_req);
- if (retval) {
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return retval;
+ struct zfcp_fsf_req *req = NULL;
+ int retval = -EIO;
+
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
+
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
+ 0, NULL);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
}
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+ req->handler = zfcp_fsf_exchange_config_data_handler;
- fsf_req->qtcb->bottom.config.feature_selection =
+ req->qtcb->bottom.config.feature_selection =
FSF_FEATURE_CFDC |
FSF_FEATURE_LUN_SHARING |
FSF_FEATURE_NOTIFICATION_LOST |
FSF_FEATURE_UPDATE_ALERT;
if (data)
- fsf_req->data = (unsigned long) data;
+ req->data = data;
- zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
- retval = zfcp_fsf_req_send(fsf_req);
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
+ zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+ retval = zfcp_fsf_req_send(req);
+out:
+ spin_unlock(&adapter->req_q.lock);
if (!retval)
- wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+ wait_event(req->completion_wq,
+ req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
return retval;
}
/**
- * zfcp_fsf_exchange_config_evaluate
- * @fsf_req: fsf_req which belongs to xchg config data request
- * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
- *
- * returns: -EIO on error, 0 otherwise
- */
-static int
-zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
-{
- struct fsf_qtcb_bottom_config *bottom;
- struct zfcp_adapter *adapter = fsf_req->adapter;
- struct Scsi_Host *shost = adapter->scsi_host;
-
- bottom = &fsf_req->qtcb->bottom.config;
- adapter->fsf_lic_version = bottom->lic_version;
- adapter->adapter_features = bottom->adapter_features;
- adapter->connection_features = bottom->connection_features;
- adapter->peer_wwpn = 0;
- adapter->peer_wwnn = 0;
- adapter->peer_d_id = 0;
-
- if (xchg_ok) {
-
- if (fsf_req->data)
- memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
- bottom, sizeof (struct fsf_qtcb_bottom_config));
-
- fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
- fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
- fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
- fc_host_speed(shost) = bottom->fc_link_speed;
- fc_host_supported_classes(shost) =
- FC_COS_CLASS2 | FC_COS_CLASS3;
- adapter->hydra_version = bottom->adapter_type;
- adapter->timer_ticks = bottom->timer_interval;
- if (fc_host_permanent_port_name(shost) == -1)
- fc_host_permanent_port_name(shost) =
- fc_host_port_name(shost);
- if (bottom->fc_topology == FSF_TOPO_P2P) {
- adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
- adapter->peer_wwpn = bottom->plogi_payload.wwpn;
- adapter->peer_wwnn = bottom->plogi_payload.wwnn;
- fc_host_port_type(shost) = FC_PORTTYPE_PTP;
- } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
- fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
- else if (bottom->fc_topology == FSF_TOPO_AL)
- fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
- else
- fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
- } else {
- fc_host_node_name(shost) = 0;
- fc_host_port_name(shost) = 0;
- fc_host_port_id(shost) = 0;
- fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
- fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
- adapter->hydra_version = 0;
- }
-
- if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
- adapter->hardware_version = bottom->hardware_version;
- memcpy(fc_host_serial_number(shost), bottom->serial_number,
- min(FC_SERIAL_NUMBER_SIZE, 17));
- EBCASC(fc_host_serial_number(shost),
- min(FC_SERIAL_NUMBER_SIZE, 17));
- }
-
- if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
- dev_err(&adapter->ccw_device->dev,
- "The adapter only supports newer control block "
- "versions, try updated device driver.\n");
- zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req);
- return -EIO;
- }
- if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
- dev_err(&adapter->ccw_device->dev,
- "The adapter only supports older control block "
- "versions, consider a microcode upgrade.\n");
- zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req);
- return -EIO;
- }
- return 0;
-}
-
-/**
- * function: zfcp_fsf_exchange_config_data_handler
- *
- * purpose: is called for finished Exchange Configuration Data command
- *
- * returns:
- */
-static int
-zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
-{
- struct fsf_qtcb_bottom_config *bottom;
- struct zfcp_adapter *adapter = fsf_req->adapter;
- struct fsf_qtcb *qtcb = fsf_req->qtcb;
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
- return -EIO;
-
- switch (qtcb->header.fsf_status) {
-
- case FSF_GOOD:
- if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
- return -EIO;
-
- switch (fc_host_port_type(adapter->scsi_host)) {
- case FC_PORTTYPE_PTP:
- if (fsf_req->erp_action)
- dev_info(&adapter->ccw_device->dev,
- "Point-to-Point fibrechannel "
- "configuration detected.\n");
- break;
- case FC_PORTTYPE_NLPORT:
- dev_err(&adapter->ccw_device->dev,
- "Unsupported arbitrated loop fibrechannel "
- "topology detected, shutting down adapter\n");
- zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req);
- return -EIO;
- case FC_PORTTYPE_NPORT:
- if (fsf_req->erp_action)
- dev_info(&adapter->ccw_device->dev,
- "Switched fabric fibrechannel "
- "network detected.\n");
- break;
- default:
- dev_err(&adapter->ccw_device->dev,
- "The fibrechannel topology reported by the "
- "adapter is not known by the zfcp driver, "
- "shutting down adapter.\n");
- zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req);
- return -EIO;
- }
- bottom = &qtcb->bottom.config;
- if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
- dev_err(&adapter->ccw_device->dev,
- "Maximum QTCB size (%d bytes) allowed by "
- "the adapter is lower than the minimum "
- "required by the driver (%ld bytes).\n",
- bottom->max_qtcb_size, sizeof(struct fsf_qtcb));
- zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req);
- return -EIO;
- }
- atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
- &adapter->status);
- break;
- case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
- if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
- return -EIO;
-
- atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
- &adapter->status);
-
- zfcp_fsf_link_down_info_eval(fsf_req, 42,
- &qtcb->header.fsf_status_qual.link_down_info);
- break;
- default:
- zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req);
- return -EIO;
- }
- return 0;
-}
-
-/**
* zfcp_fsf_exchange_port_data - request information about local port
* @erp_action: ERP action for the adapter for which port data is requested
+ * Returns: 0 on success, error otherwise
*/
-int
-zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
+ struct zfcp_fsf_req *req;
struct zfcp_adapter *adapter = erp_action->adapter;
- unsigned long lock_flags;
- int retval;
+ int retval = -EIO;
if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
return -EOPNOTSUPP;
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
- ZFCP_REQ_AUTO_CLEANUP,
- adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval) {
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return retval;
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
}
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- erp_action->fsf_req = fsf_req;
- fsf_req->erp_action = erp_action;
- zfcp_erp_start_timer(fsf_req);
-
- retval = zfcp_fsf_req_send(fsf_req);
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
+ req->handler = zfcp_fsf_exchange_port_data_handler;
+ req->erp_action = erp_action;
+ erp_action->fsf_req = req;
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
if (retval) {
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
}
+out:
+ spin_unlock(&adapter->req_q.lock);
return retval;
}
-
/**
* zfcp_fsf_exchange_port_data_sync - request information about local port
- * and wait until information is ready
+ * @adapter: pointer to struct zfcp_adapter
+ * @data: pointer to struct fsf_qtcb_bottom_port
+ * Returns: 0 on success, error otherwise
*/
-int
-zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
- struct fsf_qtcb_bottom_port *data)
+int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
+ struct fsf_qtcb_bottom_port *data)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval;
+ struct zfcp_fsf_req *req = NULL;
+ int retval = -EIO;
if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
return -EOPNOTSUPP;
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
- 0, NULL, &lock_flags, &fsf_req);
- if (retval) {
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return retval;
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
+ NULL);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
}
if (data)
- fsf_req->data = (unsigned long) data;
+ req->data = data;
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
- retval = zfcp_fsf_req_send(fsf_req);
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-
+ req->handler = zfcp_fsf_exchange_port_data_handler;
+ zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+ retval = zfcp_fsf_req_send(req);
+out:
+ spin_unlock(&adapter->req_q.lock);
if (!retval)
- wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
-
- zfcp_fsf_req_free(fsf_req);
-
- return retval;
-}
-
-/**
- * zfcp_fsf_exchange_port_evaluate
- * @fsf_req: fsf_req which belongs to xchg port data request
- * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
- */
-static void
-zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
-{
- struct zfcp_adapter *adapter;
- struct fsf_qtcb_bottom_port *bottom;
- struct Scsi_Host *shost;
-
- adapter = fsf_req->adapter;
- bottom = &fsf_req->qtcb->bottom.port;
- shost = adapter->scsi_host;
-
- if (fsf_req->data)
- memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
- sizeof(struct fsf_qtcb_bottom_port));
-
- if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
- fc_host_permanent_port_name(shost) = bottom->wwpn;
- else
- fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
- fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
- fc_host_supported_speeds(shost) = bottom->supported_speed;
-}
-
-/**
- * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
- * @fsf_req: pointer to struct zfcp_fsf_req
- */
-static void
-zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
-{
- struct zfcp_adapter *adapter;
- struct fsf_qtcb *qtcb;
-
- adapter = fsf_req->adapter;
- qtcb = fsf_req->qtcb;
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
- return;
-
- switch (qtcb->header.fsf_status) {
- case FSF_GOOD:
- zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
- atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
- break;
- case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
- zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
- atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
- zfcp_fsf_link_down_info_eval(fsf_req, 43,
- &qtcb->header.fsf_status_qual.link_down_info);
- break;
- }
-}
-
-
-/*
- * function: zfcp_fsf_open_port
- *
- * purpose:
- *
- * returns: address of initiated FSF request
- * NULL - request could not be initiated
- */
-int
-zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
-{
- volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval = 0;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(erp_action->adapter,
- FSF_QTCB_OPEN_PORT_WITH_DID,
- ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
- erp_action->adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval < 0)
- goto out;
-
- sbale = zfcp_qdio_sbale_req(fsf_req);
- sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
- sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
-
- fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
- atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
- fsf_req->data = (unsigned long) erp_action->port;
- fsf_req->erp_action = erp_action;
- erp_action->fsf_req = fsf_req;
-
- zfcp_erp_start_timer(fsf_req);
- retval = zfcp_fsf_req_send(fsf_req);
- if (retval) {
- zfcp_fsf_req_free(fsf_req);
- erp_action->fsf_req = NULL;
- goto out;
- }
+ wait_event(req->completion_wq,
+ req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+ zfcp_fsf_req_free(req);
- out:
- write_unlock_irqrestore(&erp_action->adapter->req_q.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)
+static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
{
- int retval = -EINVAL;
- struct zfcp_port *port;
+ struct zfcp_port *port = req->data;
+ struct fsf_qtcb_header *header = &req->qtcb->header;
struct fsf_plogi *plogi;
- struct fsf_qtcb_header *header;
-
- port = (struct zfcp_port *) fsf_req->data;
- header = &fsf_req->qtcb->header;
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- /* don't change port status in our bookkeeping */
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
- }
- /* evaluate FSF status in QTCB */
switch (header->fsf_status) {
-
case FSF_PORT_ALREADY_OPEN:
- /*
- * This is a bug, however operation should continue normally
- * if it is simply ignored
- */
break;
-
case FSF_ACCESS_DENIED:
- zfcp_fsf_access_denied_port(fsf_req, port);
+ zfcp_fsf_access_denied_port(req, port);
break;
-
case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The adapter is out of resources. The remote port "
"0x%016Lx could not be opened, disabling it.\n",
port->wwpn);
- zfcp_erp_port_failed(port, 31, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_port_failed(port, 31, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
- /* ERP strategy will escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* ERP strategy will escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
case FSF_SQ_NO_RETRY_POSSIBLE:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&req->adapter->ccw_device->dev,
"The remote port 0x%016Lx could not be "
"opened. Disabling it.\n", port->wwpn);
- zfcp_erp_port_failed(port, 32, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- default:
+ zfcp_erp_port_failed(port, 32, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
-
case FSF_GOOD:
- /* save port handle assigned by FSF */
port->handle = header->port_handle;
- /* mark port as open */
atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_COMMON_ACCESS_BOXED,
&port->status);
- retval = 0;
/* check whether D_ID has changed during open */
/*
* FIXME: This check is not airtight, as the FCP channel does
@@ -2021,227 +1471,168 @@ zfcp_fsf_open_port_handler(struct zfcp_f
* another GID_PN straight after a port has been opened.
* Alternately, an ADISC/PDISC ELS should suffice, as well.
*/
- plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
- if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
- {
- if (fsf_req->qtcb->bottom.support.els1_length <
- sizeof (struct fsf_plogi)) {
- /* skip sanity check and assume wwpn is ok */
- } else {
- if (plogi->serv_param.wwpn != port->wwpn) {
- atomic_clear_mask(
- ZFCP_STATUS_PORT_DID_DID,
- &port->status);
- } else {
- port->wwnn = plogi->serv_param.wwnn;
- zfcp_fc_plogi_evaluate(port, plogi);
- }
+ if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN)
+ break;
+
+ plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
+ if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
+ if (plogi->serv_param.wwpn != port->wwpn)
+ atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
+ &port->status);
+ else {
+ port->wwnn = plogi->serv_param.wwnn;
+ zfcp_fc_plogi_evaluate(port, plogi);
}
}
break;
-
case FSF_UNKNOWN_OP_SUBTYPE:
- /* should never occure, subtype not set in zfcp_fsf_open_port */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- default:
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
- skip_fsfstatus:
+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
+/**
+ * zfcp_fsf_open_port - create and send open port request
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success, error otherwise
*/
-int
-zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval = 0;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(erp_action->adapter,
- FSF_QTCB_CLOSE_PORT,
- ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
- erp_action->adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval < 0)
+ struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_fsf_req *req;
+ int retval = -EIO;
+
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
+
+ req = zfcp_fsf_req_create(adapter,
+ FSF_QTCB_OPEN_PORT_WITH_DID,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
goto out;
+ }
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
- fsf_req->data = (unsigned long) erp_action->port;
- fsf_req->erp_action = erp_action;
- fsf_req->qtcb->header.port_handle = erp_action->port->handle;
- fsf_req->erp_action = erp_action;
- erp_action->fsf_req = fsf_req;
+ req->handler = zfcp_fsf_open_port_handler;
+ req->qtcb->bottom.support.d_id = erp_action->port->d_id;
+ req->data = erp_action->port;
+ req->erp_action = erp_action;
+ erp_action->fsf_req = req;
+ atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
- zfcp_erp_start_timer(fsf_req);
- retval = zfcp_fsf_req_send(fsf_req);
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
if (retval) {
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
- goto out;
}
-
- out:
- write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+ spin_unlock(&adapter->req_q.lock);
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)
+static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
{
- int retval = -EINVAL;
- struct zfcp_port *port;
-
- port = (struct zfcp_port *) fsf_req->data;
+ struct zfcp_port *port = req->data;
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- /* don't change port status in our bookkeeping */
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
- }
-
- /* evaluate FSF status in QTCB */
- switch (fsf_req->qtcb->header.fsf_status) {
+ switch (req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
- /* Note: FSF has actually closed the port in this case.
- * The status code is just daft. Fingers crossed for a change
- */
- retval = 0;
break;
-
case FSF_GOOD:
- zfcp_erp_modify_port_status(port, 33, fsf_req,
+ zfcp_erp_modify_port_status(port, 33, req,
ZFCP_STATUS_COMMON_OPEN,
ZFCP_CLEAR);
- retval = 0;
break;
}
- skip_fsfstatus:
+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
+/**
+ * zfcp_fsf_close_port - create and send close port request
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success, error otherwise
*/
-int
-zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval = 0;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(erp_action->adapter,
- FSF_QTCB_CLOSE_PHYSICAL_PORT,
- ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
- erp_action->adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval < 0)
+ struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_fsf_req *req;
+ int retval = -EIO;
+
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
+
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
goto out;
+ }
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- /* mark port as being closed */
- atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
- &erp_action->port->status);
- /* save a pointer to this port */
- fsf_req->data = (unsigned long) erp_action->port;
- fsf_req->qtcb->header.port_handle = erp_action->port->handle;
- fsf_req->erp_action = erp_action;
- erp_action->fsf_req = fsf_req;
+ req->handler = zfcp_fsf_close_port_handler;
+ req->data = erp_action->port;
+ req->erp_action = erp_action;
+ req->qtcb->header.port_handle = erp_action->port->handle;
+ erp_action->fsf_req = req;
+ atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
- zfcp_erp_start_timer(fsf_req);
- retval = zfcp_fsf_req_send(fsf_req);
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
if (retval) {
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
- goto out;
}
-
- out:
- write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+ spin_unlock(&adapter->req_q.lock);
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)
+static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
{
- int retval = -EINVAL;
- struct zfcp_port *port;
+ struct zfcp_port *port = req->data;
+ struct fsf_qtcb_header *header = &req->qtcb->header;
struct zfcp_unit *unit;
- struct fsf_qtcb_header *header;
- port = (struct zfcp_port *) fsf_req->data;
- header = &fsf_req->qtcb->header;
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- /* don't change port status in our bookkeeping */
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
- }
- /* evaluate FSF status in QTCB */
switch (header->fsf_status) {
-
case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_ACCESS_DENIED:
- zfcp_fsf_access_denied_port(fsf_req, port);
+ zfcp_fsf_access_denied_port(req, port);
break;
-
case FSF_PORT_BOXED:
- zfcp_erp_port_boxed(port, 50, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
- ZFCP_STATUS_FSFREQ_RETRY;
-
+ zfcp_erp_port_boxed(port, 50, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
/* can't use generic zfcp_erp_modify_port_status because
* ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
@@ -2249,120 +1640,88 @@ zfcp_fsf_close_physical_port_handler(str
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
&unit->status);
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
- /* This will now be escalated by ERP */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
+ /* fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* ERP strategy will escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
-
case FSF_GOOD:
/* can't use generic zfcp_erp_modify_port_status because
* ZFCP_STATUS_COMMON_OPEN must not be reset for the port
*/
atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
list_for_each_entry(unit, &port->unit_list_head, list)
- atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
- retval = 0;
+ atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
+ &unit->status);
break;
}
-
- skip_fsfstatus:
+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
+/**
+ * zfcp_fsf_close_physical_port - close physical port
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success
*/
-int
-zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval = 0;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(erp_action->adapter,
- FSF_QTCB_OPEN_LUN,
- ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
- erp_action->adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval < 0)
+ struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_fsf_req *req;
+ int retval = -EIO;
+
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
goto out;
- sbale = zfcp_qdio_sbale_req(fsf_req);
- sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
- sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
+ }
- fsf_req->qtcb->header.port_handle = erp_action->port->handle;
- fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
- if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
- fsf_req->qtcb->bottom.support.option =
- FSF_OPEN_LUN_SUPPRESS_BOXING;
- atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
- fsf_req->data = (unsigned long) erp_action->unit;
- fsf_req->erp_action = erp_action;
- erp_action->fsf_req = fsf_req;
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
+ sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- zfcp_erp_start_timer(fsf_req);
- retval = zfcp_fsf_req_send(erp_action->fsf_req);
+ req->data = erp_action->port;
+ req->qtcb->header.port_handle = erp_action->port->handle;
+ req->erp_action = erp_action;
+ req->handler = zfcp_fsf_close_physical_port_handler;
+ erp_action->fsf_req = req;
+ atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
+ &erp_action->port->status);
+
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
if (retval) {
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
- goto out;
}
- out:
- write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+ spin_unlock(&adapter->req_q.lock);
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)
+static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *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;
+ struct zfcp_adapter *adapter = req->adapter;
+ struct zfcp_unit *unit = req->data;
+ struct fsf_qtcb_header *header = &req->qtcb->header;
+ struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
+ struct fsf_queue_designator *queue_designator =
+ &header->fsf_status_qual.fsf_queue_designator;
int exclusive, readwrite;
- unit = (struct zfcp_unit *) fsf_req->data;
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- /* don't change unit status in our bookkeeping */
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
- }
-
- adapter = fsf_req->adapter;
- header = &fsf_req->qtcb->header;
- bottom = &fsf_req->qtcb->bottom.support;
- queue_designator = &header->fsf_status_qual.fsf_queue_designator;
atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_COMMON_ACCESS_BOXED |
@@ -2370,32 +1729,25 @@ zfcp_fsf_open_unit_handler(struct zfcp_f
ZFCP_STATUS_UNIT_READONLY,
&unit->status);
- /* evaluate FSF status in QTCB */
switch (header->fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
+ zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
+ /* fall through */
case FSF_LUN_ALREADY_OPEN:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_ACCESS_DENIED:
- zfcp_fsf_access_denied_unit(fsf_req, unit);
+ zfcp_fsf_access_denied_unit(req, unit);
atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
break;
-
case FSF_PORT_BOXED:
- zfcp_erp_port_boxed(unit->port, 51, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
- ZFCP_STATUS_FSFREQ_RETRY;
+ zfcp_erp_port_boxed(unit->port, 51, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
break;
-
case FSF_LUN_SHARING_VIOLATION:
- if (header->fsf_status_qual.word[0] != 0) {
+ if (header->fsf_status_qual.word[0])
dev_warn(&adapter->ccw_device->dev,
"FCP-LUN 0x%Lx at the remote port "
"with WWPN 0x%Lx "
@@ -2405,47 +1757,37 @@ zfcp_fsf_open_unit_handler(struct zfcp_f
unit->port->wwpn,
queue_designator->hla,
queue_designator->cssid);
- } else
+ else
zfcp_act_eval_err(adapter,
header->fsf_status_qual.word[2]);
- zfcp_erp_unit_access_denied(unit, 60, fsf_req);
+ zfcp_erp_unit_access_denied(unit, 60, req);
atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
- dev_warn(&fsf_req->adapter->ccw_device->dev,
+ dev_warn(&adapter->ccw_device->dev,
"The adapter ran out of resources. There is no "
"handle available for unit 0x%016Lx on port 0x%016Lx.",
unit->fcp_lun, unit->port->wwpn);
- zfcp_erp_unit_failed(unit, 34, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_unit_failed(unit, 34, req);
+ /* fall through */
+ case FSF_INVALID_COMMAND_OPTION:
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
- /* Re-establish link to port */
zfcp_test_link(unit->port);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
+ /* fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* ERP strategy will escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
- case FSF_INVALID_COMMAND_OPTION:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EINVAL;
- break;
-
case FSF_GOOD:
- /* save LUN handle assigned by FSF */
unit->handle = header->lun_handle;
- /* mark unit as open */
atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
@@ -2463,635 +1805,256 @@ zfcp_fsf_open_unit_handler(struct zfcp_f
if (!readwrite) {
atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
&unit->status);
- dev_info(&fsf_req->adapter->ccw_device->dev,
+ dev_info(&adapter->ccw_device->dev,
"Read-only access for unit 0x%016Lx "
"on port 0x%016Lx.\n",
unit->fcp_lun, unit->port->wwpn);
}
if (exclusive && !readwrite) {
- dev_err(&fsf_req->adapter->ccw_device->dev,
+ dev_err(&adapter->ccw_device->dev,
"Exclusive access of read-only unit "
"0x%016Lx on port 0x%016Lx not "
"supported, disabling unit.\n",
unit->fcp_lun, unit->port->wwpn);
- zfcp_erp_unit_failed(unit, 35, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req);
+ zfcp_erp_unit_failed(unit, 35, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_unit_shutdown(unit, 0, 80, req);
} else if (!exclusive && readwrite) {
- dev_err(&fsf_req->adapter->ccw_device->dev,
+ dev_err(&adapter->ccw_device->dev,
"Shared access of read-write unit "
"0x%016Lx on port 0x%016Lx not "
"supported, disabling unit.\n",
unit->fcp_lun, unit->port->wwpn);
- zfcp_erp_unit_failed(unit, 36, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req);
+ zfcp_erp_unit_failed(unit, 36, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_unit_shutdown(unit, 0, 81, req);
}
}
-
- retval = 0;
break;
}
- skip_fsfstatus:
+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
+/**
+ * zfcp_fsf_open_unit - open unit
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success, error otherwise
*/
-int
-zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req;
- unsigned long lock_flags;
- int retval = 0;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(erp_action->adapter,
- FSF_QTCB_CLOSE_LUN,
- ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
- erp_action->adapter->pool.fsf_req_erp,
- &lock_flags, &fsf_req);
- if (retval < 0)
+ struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_fsf_req *req;
+ int retval = -EIO;
+
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
+
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
goto out;
+ }
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ sbale = zfcp_qdio_sbale_req(req);
sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- fsf_req->qtcb->header.port_handle = erp_action->port->handle;
- fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
- atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
- fsf_req->data = (unsigned long) erp_action->unit;
- fsf_req->erp_action = erp_action;
- erp_action->fsf_req = fsf_req;
+ req->qtcb->header.port_handle = erp_action->port->handle;
+ req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
+ req->handler = zfcp_fsf_open_unit_handler;
+ req->data = erp_action->unit;
+ req->erp_action = erp_action;
+ erp_action->fsf_req = req;
+
+ if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
+ req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
- zfcp_erp_start_timer(fsf_req);
- retval = zfcp_fsf_req_send(erp_action->fsf_req);
+ atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
+
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
if (retval) {
- zfcp_fsf_req_free(fsf_req);
+ zfcp_fsf_req_free(req);
erp_action->fsf_req = NULL;
- goto out;
}
-
- out:
- write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+ spin_unlock(&adapter->req_q.lock);
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)
+static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
{
- int retval = -EINVAL;
- struct zfcp_unit *unit;
+ struct zfcp_unit *unit = req->data;
- unit = (struct zfcp_unit *) fsf_req->data;
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- /* don't change unit status in our bookkeeping */
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
- }
-
- /* evaluate FSF status in QTCB */
- switch (fsf_req->qtcb->header.fsf_status) {
+ switch (req->qtcb->header.fsf_status) {
case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_LUN_HANDLE_NOT_VALID:
- zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ zfcp_erp_port_reopen(unit->port, 0, 111, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
-
case FSF_PORT_BOXED:
- zfcp_erp_port_boxed(unit->port, 52, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
- ZFCP_STATUS_FSFREQ_RETRY;
+ zfcp_erp_port_boxed(unit->port, 52, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
break;
-
case FSF_ADAPTER_STATUS_AVAILABLE:
- switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
+ switch (req->qtcb->header.fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
- /* re-establish link to port */
zfcp_test_link(unit->port);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
+ /* fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* ERP strategy will escalate */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
- default:
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
break;
-
case FSF_GOOD:
- /* mark unit as closed */
atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
- retval = 0;
break;
}
-
- skip_fsfstatus:
+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
+ * zfcp_fsf_close_unit - close zfcp unit
+ * @erp_action: pointer to struct zfcp_unit
+ * Returns: 0 on success, error otherwise
*/
-int
-zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
- struct zfcp_unit *unit,
- struct scsi_cmnd * scsi_cmnd,
- int use_timer, int req_flags)
-{
- struct zfcp_fsf_req *fsf_req = NULL;
- struct fcp_cmnd_iu *fcp_cmnd_iu;
- unsigned int sbtype;
- unsigned long lock_flags;
- int real_bytes = 0;
- int retval = 0;
- int mask;
-
- /* setup new FSF request */
- retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
- adapter->pool.fsf_req_scsi,
- &lock_flags, &fsf_req);
- if (unlikely(retval < 0))
- goto failed_req_create;
-
- if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
- &unit->status))) {
- retval = -EBUSY;
- goto unit_blocked;
- }
-
- zfcp_unit_get(unit);
- fsf_req->unit = unit;
-
- /* associate FSF request with SCSI request (for look up on abort) */
- scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
-
- /* associate SCSI command with FSF request */
- fsf_req->data = (unsigned long) scsi_cmnd;
-
- /* set handles of unit and its parent port in QTCB */
- fsf_req->qtcb->header.lun_handle = unit->handle;
- fsf_req->qtcb->header.port_handle = unit->port->handle;
-
- /* FSF does not define the structure of the FCP_CMND IU */
- fcp_cmnd_iu = (struct fcp_cmnd_iu *)
- &(fsf_req->qtcb->bottom.io.fcp_cmnd);
-
- /*
- * set depending on data direction:
- * data direction bits in SBALE (SB Type)
- * data direction bits in QTCB
- * data direction bits in FCP_CMND IU
- */
- switch (scsi_cmnd->sc_data_direction) {
- case DMA_NONE:
- fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
- /*
- * FIXME(qdio):
- * what is the correct type for commands
- * without 'real' data buffers?
- */
- sbtype = SBAL_FLAGS0_TYPE_READ;
- break;
- case DMA_FROM_DEVICE:
- fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
- sbtype = SBAL_FLAGS0_TYPE_READ;
- fcp_cmnd_iu->rddata = 1;
- break;
- case DMA_TO_DEVICE:
- fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
- sbtype = SBAL_FLAGS0_TYPE_WRITE;
- fcp_cmnd_iu->wddata = 1;
- break;
- case DMA_BIDIRECTIONAL:
- default:
- /*
- * dummy, catch this condition earlier
- * in zfcp_scsi_queuecommand
- */
- goto failed_scsi_cmnd;
- }
-
- /* set FC service class in QTCB (3 per default) */
- fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
-
- /* set FCP_LUN in FCP_CMND IU in QTCB */
- fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
-
- mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
-
- /* set task attributes in FCP_CMND IU in QTCB */
- if (likely((scsi_cmnd->device->simple_tags) ||
- (atomic_test_mask(mask, &unit->status))))
- fcp_cmnd_iu->task_attribute = SIMPLE_Q;
- else
- fcp_cmnd_iu->task_attribute = UNTAGGED;
-
- /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
- if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
- fcp_cmnd_iu->add_fcp_cdb_length
- = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
- /*
- * 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_sg(fsf_req, sbtype,
- scsi_sglist(scsi_cmnd),
- ZFCP_MAX_SBALS_PER_REQ);
- if (unlikely(real_bytes < 0)) {
- if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ)
- retval = -EIO;
- else {
- dev_err(&adapter->ccw_device->dev,
- "SCSI request too large. "
- "Shutting down unit 0x%016Lx on port "
- "0x%016Lx.\n", unit->fcp_lun,
- unit->port->wwpn);
- zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req);
- retval = -EINVAL;
- }
- goto no_fit;
- }
-
- /* set length of FCP data length in FCP_CMND IU in QTCB */
- zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
-
- if (use_timer)
- zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
-
- retval = zfcp_fsf_req_send(fsf_req);
- if (unlikely(retval < 0))
- goto send_failed;
-
- goto success;
-
- send_failed:
- no_fit:
- failed_scsi_cmnd:
- zfcp_unit_put(unit);
- unit_blocked:
- zfcp_fsf_req_free(fsf_req);
- fsf_req = NULL;
- scsi_cmnd->host_scribble = NULL;
- success:
- failed_req_create:
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return retval;
-}
-
-struct zfcp_fsf_req *
-zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
- struct zfcp_unit *unit,
- u8 tm_flags, int req_flags)
+int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
{
- 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;
+ struct zfcp_adapter *adapter = erp_action->adapter;
+ struct zfcp_fsf_req *req;
+ int retval = -EIO;
- /* 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)
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
goto out;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
+ ZFCP_REQ_AUTO_CLEANUP,
+ adapter->pool.fsf_req_erp);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
+ }
- if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
- &unit->status)))
- goto unit_blocked;
-
- /*
- * Used to decide on proper handler in the return path,
- * could be either zfcp_fsf_send_fcp_command_task_handler or
- * zfcp_fsf_send_fcp_command_task_management_handler */
-
- fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
-
- /*
- * hold a pointer to the unit being target of this
- * task management request
- */
- fsf_req->data = (unsigned long) unit;
-
- /* set FSF related fields in QTCB */
- fsf_req->qtcb->header.lun_handle = unit->handle;
- fsf_req->qtcb->header.port_handle = unit->port->handle;
- fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
- fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
- fsf_req->qtcb->bottom.io.fcp_cmnd_length =
- sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
-
- sbale = zfcp_qdio_sbale_req(fsf_req);
- sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- /* set FCP related fields in FCP_CMND IU in QTCB */
- fcp_cmnd_iu = (struct fcp_cmnd_iu *)
- &(fsf_req->qtcb->bottom.io.fcp_cmnd);
- fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
- fcp_cmnd_iu->task_management_flags = tm_flags;
-
- zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
- retval = zfcp_fsf_req_send(fsf_req);
- if (!retval)
- goto out;
+ req->qtcb->header.port_handle = erp_action->port->handle;
+ req->qtcb->header.lun_handle = erp_action->unit->handle;
+ req->handler = zfcp_fsf_close_unit_handler;
+ req->data = erp_action->unit;
+ req->erp_action = erp_action;
+ erp_action->fsf_req = req;
+ atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
- unit_blocked:
- zfcp_fsf_req_free(fsf_req);
- fsf_req = NULL;
-
- out:
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return fsf_req;
+ zfcp_erp_start_timer(req);
+ retval = zfcp_fsf_req_send(req);
+ if (retval) {
+ zfcp_fsf_req_free(req);
+ erp_action->fsf_req = NULL;
+ }
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return retval;
}
static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
{
lat_rec->sum += lat;
- if (lat_rec->min > lat)
- lat_rec->min = lat;
- if (lat_rec->max < lat)
- lat_rec->max = lat;
+ lat_rec->min = min(lat_rec->min, lat);
+ lat_rec->max = max(lat_rec->max, lat);
}
-static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
{
struct fsf_qual_latency_info *lat_inf;
struct latency_cont *lat;
- struct zfcp_unit *unit;
+ struct zfcp_unit *unit = req->unit;
unsigned long flags;
- lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
- unit = fsf_req->unit;
+ lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
- switch (fsf_req->qtcb->bottom.io.data_direction) {
+ switch (req->qtcb->bottom.io.data_direction) {
case FSF_DATADIR_READ:
lat = &unit->latencies.read;
break;
case FSF_DATADIR_WRITE:
lat = &unit->latencies.write;
break;
- case FSF_DATADIR_CMND:
- lat = &unit->latencies.cmd;
- break;
- default:
- return;
- }
-
- spin_lock_irqsave(&unit->latencies.lock, flags);
- zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
- zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
- lat->counter++;
- spin_unlock_irqrestore(&unit->latencies.lock, flags);
-}
-
-/*
- * 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;
-
- header = &fsf_req->qtcb->header;
-
- if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
- unit = (struct zfcp_unit *) fsf_req->data;
- else
- unit = fsf_req->unit;
-
- if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
- /* go directly to calls of special handlers */
- goto skip_fsfstatus;
- }
-
- /* evaluate FSF status in QTCB */
- switch (header->fsf_status) {
-
- case FSF_PORT_HANDLE_NOT_VALID:
- zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_LUN_HANDLE_NOT_VALID:
- zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_HANDLE_MISMATCH:
- zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_SERVICE_CLASS_NOT_SUPPORTED:
- zfcp_fsf_class_not_supp(fsf_req);
- break;
-
- case FSF_FCPLUN_NOT_VALID:
- zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_ACCESS_DENIED:
- zfcp_fsf_access_denied_unit(fsf_req, unit);
- break;
-
- case FSF_DIRECTION_INDICATOR_NOT_VALID:
- dev_err(&fsf_req->adapter->ccw_device->dev,
- "Invalid data direction (%d) given for unit 0x%016Lx "
- "on port 0x%016Lx, shutting down adapter.\n",
- fsf_req->qtcb->bottom.io.data_direction,
- unit->fcp_lun, unit->port->wwpn);
- zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_CMND_LENGTH_NOT_VALID:
- dev_err(&fsf_req->adapter->ccw_device->dev,
- "An invalid control-data-block length field (%d) "
- "was found in a command for unit 0x%016Lx on port "
- "0x%016Lx. Shutting down adapter.\n",
- fsf_req->qtcb->bottom.io.fcp_cmnd_length,
- unit->fcp_lun, unit->port->wwpn);
- zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_PORT_BOXED:
- zfcp_erp_port_boxed(unit->port, 53, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
- ZFCP_STATUS_FSFREQ_RETRY;
- break;
-
- case FSF_LUN_BOXED:
- zfcp_erp_unit_boxed(unit, 54, fsf_req);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
- | ZFCP_STATUS_FSFREQ_RETRY;
- break;
-
- case FSF_ADAPTER_STATUS_AVAILABLE:
- switch (header->fsf_status_qual.word[0]) {
- case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
- /* re-establish link to port */
- zfcp_test_link(unit->port);
- break;
- case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- /* FIXME(hw) need proper specs for proper action */
- /* let scsi stack deal with retries and escalation */
- break;
- }
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
-
- case FSF_GOOD:
- break;
-
- case FSF_FCP_RSP_AVAILABLE:
+ case FSF_DATADIR_CMND:
+ lat = &unit->latencies.cmd;
break;
+ default:
+ return;
}
- skip_fsfstatus:
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
- retval =
- zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
- } else {
- retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
- fsf_req->unit = NULL;
- zfcp_unit_put(unit);
- }
- return retval;
+ spin_lock_irqsave(&unit->latencies.lock, flags);
+ zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
+ zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
+ lat->counter++;
+ spin_unlock_irqrestore(&unit->latencies.lock, flags);
}
-/*
- * function: zfcp_fsf_send_fcp_command_task_handler
- *
- * purpose: evaluates FCP_RSP IU
- *
- * returns:
- */
-static int
-zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
{
- int retval = 0;
- struct scsi_cmnd *scpnt;
+ struct scsi_cmnd *scpnt = req->data;
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
- &(fsf_req->qtcb->bottom.io.fcp_rsp);
+ &(req->qtcb->bottom.io.fcp_rsp);
u32 sns_len;
char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
unsigned long flags;
- read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
- scpnt = (struct scsi_cmnd *) fsf_req->data;
if (unlikely(!scpnt))
- goto out;
+ return;
- 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.
- */
+ read_lock_irqsave(&req->adapter->abort_lock, flags);
+
+ if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
set_host_byte(scpnt, DID_SOFT_ERROR);
set_driver_byte(scpnt, SUGGEST_RETRY);
goto skip_fsfstatus;
}
- if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
+ if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
set_host_byte(scpnt, DID_ERROR);
goto skip_fsfstatus;
}
- /* set message byte of result in SCSI command */
set_msg_byte(scpnt, COMMAND_COMPLETE);
- /*
- * 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 (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
- zfcp_fsf_req_latency(fsf_req);
+ if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
+ zfcp_fsf_req_latency(req);
- /* check FCP_RSP_INFO */
if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
- switch (fcp_rsp_info[3]) {
- case RSP_CODE_GOOD:
- /* ok, continue */
+ if (fcp_rsp_info[3] == RSP_CODE_GOOD)
set_host_byte(scpnt, DID_OK);
- break;
- case RSP_CODE_LENGTH_MISMATCH:
- /* hardware bug */
- set_host_byte(scpnt, DID_ERROR);
- goto skip_fsfstatus;
- case RSP_CODE_FIELD_INVALID:
- /* driver or hardware bug */
- set_host_byte(scpnt, DID_ERROR);
- goto skip_fsfstatus;
- case RSP_CODE_RO_MISMATCH:
- /* hardware bug */
- set_host_byte(scpnt, DID_ERROR);
- goto skip_fsfstatus;
- default:
- /* invalid FCP response code */
+ else {
set_host_byte(scpnt, DID_ERROR);
goto skip_fsfstatus;
}
}
- /* check for sense data */
if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
- sns_len = FSF_FCP_RSP_SIZE -
- sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
+ sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
+ fcp_rsp_iu->fcp_rsp_len;
sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
@@ -3099,382 +2062,372 @@ zfcp_fsf_send_fcp_command_task_handler(s
zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
}
- /* check for underrun */
if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
scpnt->underflow)
set_host_byte(scpnt, DID_ERROR);
}
-
- skip_fsfstatus:
+skip_fsfstatus:
if (scpnt->result != 0)
- zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
+ zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
else if (scpnt->retries > 0)
- zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
+ zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
else
- zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
+ zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
- /* cleanup pointer (need this especially for abort) */
scpnt->host_scribble = NULL;
-
- /* always call back */
(scpnt->scsi_done) (scpnt);
-
/*
* We must hold this lock until scsi_done has been called.
* Otherwise we may call scsi_done after abort regarding this
* command has completed.
* Note: scsi_done must not block!
*/
- out:
- read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
- return retval;
+ read_unlock_irqrestore(&req->adapter->abort_lock, flags);
}
-/*
- * 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)
+static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
{
- int retval = 0;
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
- &(fsf_req->qtcb->bottom.io.fcp_rsp);
+ &(req->qtcb->bottom.io.fcp_rsp);
char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+ if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
+ (req->status & ZFCP_STATUS_FSFREQ_ERROR))
+ req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+}
+
+
+static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
+{
+ struct zfcp_unit *unit;
+ struct fsf_qtcb_header *header = &req->qtcb->header;
+
+ if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
+ unit = req->data;
+ else
+ unit = req->unit;
+
+ if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
goto skip_fsfstatus;
- }
- /* check FCP_RSP_INFO */
- switch (fcp_rsp_info[3]) {
- case RSP_CODE_GOOD:
- /* ok, continue */
+ switch (header->fsf_status) {
+ case FSF_HANDLE_MISMATCH:
+ case FSF_PORT_HANDLE_NOT_VALID:
+ zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ break;
+ case FSF_FCPLUN_NOT_VALID:
+ case FSF_LUN_HANDLE_NOT_VALID:
+ zfcp_erp_port_reopen(unit->port, 0, 113, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
- case RSP_CODE_TASKMAN_UNSUPP:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
+ case FSF_SERVICE_CLASS_NOT_SUPPORTED:
+ zfcp_fsf_class_not_supp(req);
break;
- case RSP_CODE_TASKMAN_FAILED:
- fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+ case FSF_ACCESS_DENIED:
+ zfcp_fsf_access_denied_unit(req, unit);
+ break;
+ case FSF_DIRECTION_INDICATOR_NOT_VALID:
+ dev_err(&req->adapter->ccw_device->dev,
+ "Invalid data direction (%d) given for unit "
+ "0x%016Lx on port 0x%016Lx, shutting down "
+ "adapter.\n",
+ req->qtcb->bottom.io.data_direction,
+ unit->fcp_lun, unit->port->wwpn);
+ zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ break;
+ case FSF_CMND_LENGTH_NOT_VALID:
+ dev_err(&req->adapter->ccw_device->dev,
+ "An invalid control-data-block length field (%d) "
+ "was found in a command for unit 0x%016Lx on port "
+ "0x%016Lx. Shutting down adapter.\n",
+ req->qtcb->bottom.io.fcp_cmnd_length,
+ unit->fcp_lun, unit->port->wwpn);
+ zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+ break;
+ case FSF_PORT_BOXED:
+ zfcp_erp_port_boxed(unit->port, 53, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
+ break;
+ case FSF_LUN_BOXED:
+ zfcp_erp_unit_boxed(unit, 54, req);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+ ZFCP_STATUS_FSFREQ_RETRY;
+ break;
+ case FSF_ADAPTER_STATUS_AVAILABLE:
+ if (header->fsf_status_qual.word[0] ==
+ FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
+ zfcp_test_link(unit->port);
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
- default:
- /* invalid FCP response code */
- fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
}
-
- skip_fsfstatus:
- return retval;
+skip_fsfstatus:
+ if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
+ zfcp_fsf_send_fcp_ctm_handler(req);
+ else {
+ zfcp_fsf_send_fcp_command_task_handler(req);
+ req->unit = NULL;
+ zfcp_unit_put(unit);
+ }
}
-
-/*
- * 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
+/**
+ * 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
*/
-struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
- struct zfcp_fsf_cfdc *fsf_cfdc)
+int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
+ struct zfcp_unit *unit,
+ struct scsi_cmnd *scsi_cmnd,
+ int use_timer, int req_flags)
{
- struct zfcp_fsf_req *fsf_req;
- struct fsf_qtcb_bottom_support *bottom;
- volatile struct qdio_buffer_element *sbale;
- unsigned long lock_flags;
- int direction;
- int retval;
- int bytes;
+ struct zfcp_fsf_req *req;
+ struct fcp_cmnd_iu *fcp_cmnd_iu;
+ unsigned int sbtype;
+ int real_bytes, retval = -EIO;
- if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
- return ERR_PTR(-EOPNOTSUPP);
+ if (unlikely(!(atomic_read(&unit->status) &
+ ZFCP_STATUS_COMMON_UNBLOCKED)))
+ return -EBUSY;
- switch (fsf_cfdc->command) {
- case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
- direction = SBAL_FLAGS0_TYPE_WRITE;
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
+ adapter->pool.fsf_req_scsi);
+ if (unlikely(IS_ERR(req))) {
+ retval = PTR_ERR(req);
+ goto out;
+ }
+
+ zfcp_unit_get(unit);
+ req->unit = unit;
+ req->data = scsi_cmnd;
+ req->handler = zfcp_fsf_send_fcp_command_handler;
+ req->qtcb->header.lun_handle = unit->handle;
+ req->qtcb->header.port_handle = unit->port->handle;
+ req->qtcb->bottom.io.service_class = FSF_CLASS_3;
+
+ scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
+
+ fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
+ fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
+ /*
+ * set depending on data direction:
+ * data direction bits in SBALE (SB Type)
+ * data direction bits in QTCB
+ * data direction bits in FCP_CMND IU
+ */
+ switch (scsi_cmnd->sc_data_direction) {
+ case DMA_NONE:
+ req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
+ sbtype = SBAL_FLAGS0_TYPE_READ;
break;
- case FSF_QTCB_UPLOAD_CONTROL_FILE:
- direction = SBAL_FLAGS0_TYPE_READ;
+ case DMA_FROM_DEVICE:
+ req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
+ sbtype = SBAL_FLAGS0_TYPE_READ;
+ fcp_cmnd_iu->rddata = 1;
+ break;
+ case DMA_TO_DEVICE:
+ req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
+ sbtype = SBAL_FLAGS0_TYPE_WRITE;
+ fcp_cmnd_iu->wddata = 1;
break;
+ case DMA_BIDIRECTIONAL:
default:
- return ERR_PTR(-EINVAL);
+ retval = -EIO;
+ goto failed_scsi_cmnd;
}
- retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command,
- ZFCP_WAIT_FOR_SBAL,
- NULL, &lock_flags, &fsf_req);
- if (retval < 0) {
- retval = -EPERM;
- goto unlock_queue_lock;
- }
+ if (likely((scsi_cmnd->device->simple_tags) ||
+ ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
+ (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
+ fcp_cmnd_iu->task_attribute = SIMPLE_Q;
+ else
+ fcp_cmnd_iu->task_attribute = UNTAGGED;
- sbale = zfcp_qdio_sbale_req(fsf_req);
- sbale[0].flags |= direction;
+ if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
+ fcp_cmnd_iu->add_fcp_cdb_length =
+ (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
- bottom = &fsf_req->qtcb->bottom.support;
- bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
- bottom->option = fsf_cfdc->option;
+ memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
- bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
- fsf_cfdc->sg,
- ZFCP_MAX_SBALS_PER_REQ);
- if (bytes != ZFCP_CFDC_MAX_SIZE) {
- retval = -ENOMEM;
- goto free_fsf_req;
- }
+ req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
+ fcp_cmnd_iu->add_fcp_cdb_length + sizeof(fcp_dl_t);
- zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
- retval = zfcp_fsf_req_send(fsf_req);
- if (retval < 0) {
- retval = -EPERM;
- goto free_fsf_req;
+ real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
+ scsi_sglist(scsi_cmnd),
+ FSF_MAX_SBALS_PER_REQ);
+ if (unlikely(real_bytes < 0)) {
+ if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
+ retval = -EIO;
+ else {
+ dev_err(&adapter->ccw_device->dev,
+ "SCSI request too large. "
+ "Shutting down unit 0x%016Lx on port "
+ "0x%016Lx.\n", unit->fcp_lun,
+ unit->port->wwpn);
+ zfcp_erp_unit_shutdown(unit, 0, 131, req);
+ retval = -EINVAL;
+ }
+ goto failed_scsi_cmnd;
}
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-
- wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
- return fsf_req;
+ zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
- free_fsf_req:
- zfcp_fsf_req_free(fsf_req);
- unlock_queue_lock:
- write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
- return ERR_PTR(retval);
-}
+ if (use_timer)
+ zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
-static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
-{
- if (fsf_req->qtcb->header.fsf_status != FSF_GOOD)
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-}
+ retval = zfcp_fsf_req_send(req);
+ if (unlikely(retval))
+ goto failed_scsi_cmnd;
-static inline int
-zfcp_fsf_req_sbal_check(unsigned long *flags,
- struct zfcp_qdio_queue *queue, int needed)
-{
- write_lock_irqsave(&queue->lock, *flags);
- if (likely(atomic_read(&queue->count) >= needed))
- return 1;
- write_unlock_irqrestore(&queue->lock, *flags);
- return 0;
-}
+ goto out;
-/*
- * set qtcb pointer in fsf_req and initialize QTCB
- */
-static void
-zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
-{
- if (likely(fsf_req->qtcb != NULL)) {
- fsf_req->qtcb->prefix.req_seq_no =
- fsf_req->adapter->fsf_req_seq_no;
- fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
- fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
- fsf_req->qtcb->prefix.qtcb_type =
- fsf_qtcb_type[fsf_req->fsf_command];
- fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
- fsf_req->qtcb->header.req_handle = fsf_req->req_id;
- fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
- }
+failed_scsi_cmnd:
+ zfcp_unit_put(unit);
+ zfcp_fsf_req_free(req);
+ scsi_cmnd->host_scribble = NULL;
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return retval;
}
/**
- * zfcp_fsf_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->req_q->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_q = &adapter->req_q;
-
- if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
- ret = wait_event_interruptible_timeout(adapter->request_wq,
- zfcp_fsf_req_sbal_check(lock_flags, req_q, 1),
- ZFCP_SBAL_TIMEOUT);
- if (ret < 0)
- return ret;
- if (!ret)
- return -EIO;
- } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_q, 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)
+ * zfcp_fsf_send_fcp_ctm - send SCSI task management command
+ * @adapter: pointer to struct zfcp-adapter
+ * @unit: pointer to struct zfcp_unit
+ * @tm_flags: unsigned byte for task management flags
+ * @req_flags: int request flags
+ * Returns: on success pointer to struct fsf_req, NULL otherwise
+ */
+struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
+ struct zfcp_unit *unit,
+ u8 tm_flags, int req_flags)
{
volatile struct qdio_buffer_element *sbale;
- struct zfcp_fsf_req *fsf_req = NULL;
- int ret = 0;
- struct zfcp_qdio_queue *req_q = &adapter->req_q;
-
- /* allocate new FSF request */
- fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
- if (unlikely(!fsf_req)) {
- ret = -ENOMEM;
- goto failed_fsf_req;
- }
-
- fsf_req->adapter = adapter;
- fsf_req->fsf_command = fsf_cmd;
- INIT_LIST_HEAD(&fsf_req->list);
- init_timer(&fsf_req->timer);
-
- /* initialize waitqueue which may be used to wait on
- this request completion */
- init_waitqueue_head(&fsf_req->completion_wq);
-
- ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
- if (ret < 0)
- goto failed_sbals;
-
- /* this is serialized (we are holding req_queue-lock of adapter) */
- if (adapter->req_no == 0)
- adapter->req_no++;
- fsf_req->req_id = adapter->req_no++;
-
- zfcp_fsf_req_qtcb_init(fsf_req);
+ struct zfcp_fsf_req *req = NULL;
+ struct fcp_cmnd_iu *fcp_cmnd_iu;
- /*
- * 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 (unlikely(!(atomic_read(&unit->status) &
+ ZFCP_STATUS_COMMON_UNBLOCKED)))
+ return NULL;
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
- write_unlock_irqrestore(&req_q->lock, *lock_flags);
- ret = -EIO;
- goto failed_sbals;
- }
+ spin_lock(&adapter->req_q.lock);
+ if (!atomic_read(&adapter->req_q.count))
+ goto out;
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
+ adapter->pool.fsf_req_scsi);
+ if (unlikely(IS_ERR(req)))
+ goto out;
- if (fsf_req->qtcb) {
- fsf_req->seq_no = adapter->fsf_req_seq_no;
- fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
- }
- fsf_req->sbal_number = 1;
- fsf_req->sbal_first = req_q->first;
- fsf_req->sbal_last = req_q->first;
- fsf_req->sbale_curr = 1;
+ req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
+ req->data = unit;
+ req->handler = zfcp_fsf_send_fcp_command_handler;
+ req->qtcb->header.lun_handle = unit->handle;
+ req->qtcb->header.port_handle = unit->port->handle;
+ req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
+ req->qtcb->bottom.io.service_class = FSF_CLASS_3;
+ req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
+ sizeof(fcp_dl_t);
- if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
- fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
- }
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
+ sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
+ fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
+ fcp_cmnd_iu->task_management_flags = tm_flags;
- /* setup common SBALE fields */
- sbale[0].addr = (void *) fsf_req->req_id;
- sbale[0].flags |= SBAL_FLAGS0_COMMAND;
- if (likely(fsf_req->qtcb != NULL)) {
- sbale[1].addr = (void *) fsf_req->qtcb;
- sbale[1].length = sizeof(struct fsf_qtcb);
- }
+ zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
+ if (!zfcp_fsf_req_send(req))
+ goto out;
- goto success;
+ zfcp_fsf_req_free(req);
+ req = NULL;
+out:
+ spin_unlock(&adapter->req_q.lock);
+ return req;
+}
- failed_sbals:
-/* dequeue new FSF request previously enqueued */
- zfcp_fsf_req_free(fsf_req);
- fsf_req = NULL;
-
- failed_fsf_req:
- write_lock_irqsave(&req_q->lock, *lock_flags);
- success:
- *fsf_req_p = fsf_req;
- return ret;
+static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
+{
+ if (req->qtcb->header.fsf_status != FSF_GOOD)
+ req->status |= ZFCP_STATUS_FSFREQ_ERROR;
}
-/*
- * 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
+/**
+ * zfcp_fsf_control_file - control file upload/download
+ * @adapter: pointer to struct zfcp_adapter
+ * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
+ * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
*/
-static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
+struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
+ struct zfcp_fsf_cfdc *fsf_cfdc)
{
- struct zfcp_adapter *adapter;
- struct zfcp_qdio_queue *req_q;
volatile struct qdio_buffer_element *sbale;
- int inc_seq_no;
- int retval = 0;
+ struct zfcp_fsf_req *req = NULL;
+ struct fsf_qtcb_bottom_support *bottom;
+ int direction, retval = -EIO, bytes;
+
+ if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
+ return ERR_PTR(-EOPNOTSUPP);
- adapter = fsf_req->adapter;
- req_q = &adapter->req_q;
+ switch (fsf_cfdc->command) {
+ case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
+ direction = SBAL_FLAGS0_TYPE_WRITE;
+ break;
+ case FSF_QTCB_UPLOAD_CONTROL_FILE:
+ direction = SBAL_FLAGS0_TYPE_READ;
+ break;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
- sbale = zfcp_qdio_sbale_req(fsf_req);
+ spin_lock(&adapter->req_q.lock);
+ if (zfcp_fsf_req_sbal_get(adapter))
+ goto out;
- /* put allocated FSF request into hash table */
- spin_lock(&adapter->req_list_lock);
- zfcp_reqlist_add(adapter, fsf_req);
- spin_unlock(&adapter->req_list_lock);
+ req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
+ if (unlikely(IS_ERR(req))) {
+ retval = -EPERM;
+ goto out;
+ }
- inc_seq_no = (fsf_req->qtcb != NULL);
+ req->handler = zfcp_fsf_control_file_handler;
- fsf_req->issued = get_clock();
+ sbale = zfcp_qdio_sbale_req(req);
+ sbale[0].flags |= direction;
- retval = zfcp_qdio_send(fsf_req);
+ bottom = &req->qtcb->bottom.support;
+ bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
+ bottom->option = fsf_cfdc->option;
- if (unlikely(retval)) {
- /* Queues are down..... */
- del_timer(&fsf_req->timer);
- spin_lock(&adapter->req_list_lock);
- zfcp_reqlist_remove(adapter, fsf_req);
- spin_unlock(&adapter->req_list_lock);
- /* undo changes in request queue made for this request */
- atomic_add(fsf_req->sbal_number, &req_q->count);
- req_q->first -= fsf_req->sbal_number;
- req_q->first += QDIO_MAX_BUFFERS_PER_Q;
- req_q->first %= QDIO_MAX_BUFFERS_PER_Q;
- zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req);
- retval = -EIO;
- } else {
- /*
- * 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,
- */
+ bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
+ FSF_MAX_SBALS_PER_REQ);
+ if (bytes != ZFCP_CFDC_MAX_SIZE) {
+ retval = -ENOMEM;
+ zfcp_fsf_req_free(req);
+ goto out;
+ }
- /* Don't increase for unsolicited status */
- if (inc_seq_no)
- adapter->fsf_req_seq_no++;
+ zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+ retval = zfcp_fsf_req_send(req);
+out:
+ spin_unlock(&adapter->req_q.lock);
+
+ if (!retval) {
+ wait_event(req->completion_wq,
+ req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+ return req;
}
- return retval;
+ return ERR_PTR(retval);
}
--- a/drivers/s390/scsi/zfcp_def.h 2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h 2008-06-30 11:28:20.000000000 +0200
@@ -76,11 +76,6 @@ zfcp_address_to_sg(void *address, struct
#define ZFCP_DEVICE_MODEL 0x03
#define ZFCP_DEVICE_MODEL_PRIV 0x04
-/* allow as many chained SBALs as are supported by hardware */
-#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ
-#define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ
-#define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ
-
/* DMQ bug workaround: don't use last SBALE */
#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
@@ -89,21 +84,17 @@ zfcp_address_to_sg(void *address, struct
/* max. number of (data buffer) SBALEs in largest SBAL chain */
#define ZFCP_MAX_SBALES_PER_REQ \
- (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
+ (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
/* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
/* max. number of (data buffer) SBALEs in largest SBAL chain
multiplied with number of sectors per 4k block */
-#define ZFCP_SBAL_TIMEOUT (5*HZ)
-
#define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */
/********************* FSF SPECIFIC DEFINES *********************************/
-#define ZFCP_ULP_INFO_VERSION 26
-#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION
/* ATTENTION: value must not be used by hardware */
#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
@@ -121,8 +112,6 @@ typedef unsigned long long fcp_lun_t;
/* data length field may be at variable position in FCP-2 FCP_CMND IU */
typedef unsigned int fcp_dl_t;
-#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3
-
/* timeout for name-server lookup (in seconds) */
#define ZFCP_NS_GID_PN_TIMEOUT 10
@@ -228,7 +217,6 @@ struct fcp_logo {
* FC-FS stuff
*/
#define R_A_TOV 10 /* seconds */
-#define ZFCP_ELS_TIMEOUT (2 * R_A_TOV)
#define ZFCP_LS_RLS 0x0f
#define ZFCP_LS_ADISC 0x52
@@ -521,7 +509,7 @@ struct zfcp_qdio_queue {
in queue (free_count>0) */
atomic_t count; /* number of free buffers
in queue */
- rwlock_t lock; /* lock for operations on queue */
+ spinlock_t lock; /* lock for operations on queue */
int pci_batch; /* SBALs since PCI indication
was last set */
};
@@ -686,7 +674,7 @@ struct zfcp_fsf_req {
u32 fsf_command; /* FSF Command copy */
struct fsf_qtcb *qtcb; /* address of associated QTCB */
u32 seq_no; /* Sequence number of request */
- unsigned long data; /* private data of request */
+ void *data; /* private data of request */
struct timer_list timer; /* used for erp or scsi er */
struct zfcp_erp_action *erp_action; /* used if this request is
issued on behalf of erp */
@@ -694,10 +682,9 @@ struct zfcp_fsf_req {
from emergency pool */
unsigned long long issued; /* request sent time (STCK) */
struct zfcp_unit *unit;
+ void (*handler)(struct zfcp_fsf_req *);
};
-typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
-
/* driver data */
struct zfcp_data {
struct scsi_host_template scsi_host_template;
@@ -730,7 +717,6 @@ struct zfcp_fsf_req_qtcb {
/********************** ZFCP SPECIFIC DEFINES ********************************/
#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
-#define ZFCP_WAIT_FOR_SBAL 0x00000004
#define ZFCP_REQ_NO_QTCB 0x00000008
#define ZFCP_SET 0x00000100
@@ -753,15 +739,6 @@ static inline int zfcp_reqlist_hash(unsi
return req_id % REQUEST_LIST_SIZE;
}
-static inline void zfcp_reqlist_add(struct zfcp_adapter *adapter,
- struct zfcp_fsf_req *fsf_req)
-{
- unsigned int idx;
-
- idx = zfcp_reqlist_hash(fsf_req->req_id);
- list_add_tail(&fsf_req->list, &adapter->req_list[idx]);
-}
-
static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter,
struct zfcp_fsf_req *fsf_req)
{
--- a/drivers/s390/scsi/zfcp_ext.h 2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h 2008-06-30 11:28:20.000000000 +0200
@@ -70,21 +70,19 @@ extern struct zfcp_fsf_req *zfcp_fsf_con
extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long);
extern void zfcp_erp_start_timer(struct zfcp_fsf_req *);
extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
-extern int zfcp_fsf_status_read(struct zfcp_adapter *, int);
+extern int zfcp_fsf_status_read(struct zfcp_adapter *);
extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
-extern int zfcp_fsf_req_create(struct zfcp_adapter *, u32, int, mempool_t *,
- unsigned long *, struct zfcp_fsf_req **)
- __acquires(adapter->req_q.lock);
extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
struct zfcp_erp_action *);
extern int zfcp_fsf_send_els(struct zfcp_send_els *);
extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *,
struct zfcp_unit *,
struct scsi_cmnd *, int, int);
-extern int zfcp_fsf_req_complete(struct zfcp_fsf_req *);
+extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *);
extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
-extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_command_task_management(
- struct zfcp_adapter *, struct zfcp_unit *, u8, int);
+extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *,
+ struct zfcp_unit *, u8,
+ int);
extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(
unsigned long, struct zfcp_adapter *, struct zfcp_unit *, int);
--- a/drivers/s390/scsi/zfcp_dbf.c 2008-06-30 11:27:23.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c 2008-06-30 11:28:20.000000000 +0200
@@ -961,7 +961,7 @@ void zfcp_san_dbf_event_incoming_els(str
zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
fc_host_port_id(adapter->scsi_host),
- *(u8 *)buf->payload, (void *)buf->payload,
+ buf->payload.data[0], (void *)buf->payload.data,
length);
}
--- a/drivers/s390/scsi/zfcp_fc.c 2008-06-30 11:27:42.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c 2008-06-30 11:28:20.000000000 +0200
@@ -83,8 +83,8 @@ static void zfcp_fc_incoming_rscn(struct
u16 no_entries;
u32 range_mask;
- fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
- fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
+ fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data;
+ fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head;
/* see FC-FS */
no_entries = fcp_rscn_head->payload_len /
@@ -135,7 +135,7 @@ static void zfcp_fc_incoming_plogi(struc
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *)req->data;
struct fsf_plogi *els_plogi =
- (struct fsf_plogi *) status_buffer->payload;
+ (struct fsf_plogi *) status_buffer->payload.data;
zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn);
}
@@ -144,7 +144,8 @@ static void zfcp_fc_incoming_logo(struct
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *)req->data;
- struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
+ struct fcp_logo *els_logo =
+ (struct fcp_logo *) status_buffer->payload.data;
zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn);
}
@@ -157,7 +158,7 @@ void zfcp_fc_incoming_els(struct zfcp_fs
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *) fsf_req->data;
- unsigned int els_type = status_buffer->payload[0];
+ unsigned int els_type = status_buffer->payload.data[0];
zfcp_san_dbf_event_incoming_els(fsf_req);
if (els_type == LS_PLOGI)
--- a/drivers/s390/scsi/zfcp_fsf.h 2008-06-30 11:24:30.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.h 2008-06-30 11:28:20.000000000 +0200
@@ -287,6 +287,18 @@ struct fsf_bit_error_payload {
u32 current_transmit_b2b_credit;
} __attribute__ ((packed));
+struct fsf_link_down_info {
+ u32 error_code;
+ u32 res1;
+ u8 res2[2];
+ u8 primary_status;
+ u8 ioerr_code;
+ u8 action_code;
+ u8 reason_code;
+ u8 explanation_code;
+ u8 vendor_specific_code;
+} __attribute__ ((packed));
+
struct fsf_status_read_buffer {
u32 status_type;
u32 status_subtype;
@@ -297,7 +309,12 @@ struct fsf_status_read_buffer {
u32 class;
u64 fcp_lun;
u8 res3[24];
- u8 payload[FSF_STATUS_READ_PAYLOAD_SIZE];
+ union {
+ u8 data[FSF_STATUS_READ_PAYLOAD_SIZE];
+ u32 word[FSF_STATUS_READ_PAYLOAD_SIZE/sizeof(u32)];
+ struct fsf_link_down_info link_down_info;
+ struct fsf_bit_error_payload bit_error;
+ } payload;
} __attribute__ ((packed));
struct fsf_qual_version_error {
@@ -310,18 +327,6 @@ struct fsf_qual_sequence_error {
u32 res1[3];
} __attribute__ ((packed));
-struct fsf_link_down_info {
- u32 error_code;
- u32 res1;
- u8 res2[2];
- u8 primary_status;
- u8 ioerr_code;
- u8 action_code;
- u8 reason_code;
- u8 explanation_code;
- u8 vendor_specific_code;
-} __attribute__ ((packed));
-
struct fsf_qual_latency_info {
u32 channel_lat;
u32 fabric_lat;
--- a/drivers/s390/scsi/zfcp_scsi.c 2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c 2008-06-30 11:28:20.000000000 +0200
@@ -182,7 +182,7 @@ static int zfcp_scsi_eh_abort_handler(st
zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
return retval;
}
- fsf_req->data = 0;
+ fsf_req->data = NULL;
fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
/* don't access old fsf_req after releasing the abort_lock */
@@ -220,8 +220,7 @@ static int zfcp_task_mgmt_function(struc
int retval = SUCCESS;
/* issue task management function */
- fsf_req = zfcp_fsf_send_fcp_command_task_management
- (adapter, unit, tm_flags, 0);
+ fsf_req = zfcp_fsf_send_fcp_ctm(adapter, unit, tm_flags, 0);
if (!fsf_req) {
zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
return FAILED;
--- a/drivers/s390/scsi/zfcp_qdio.c 2008-06-30 11:25:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c 2008-06-30 11:28:20.000000000 +0200
@@ -10,7 +10,7 @@
/* FIXME(tune): free space should be one max. SBAL chain plus what? */
#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \
- - (ZFCP_MAX_SBALS_PER_REQ + 4))
+ - (FSF_MAX_SBALS_PER_REQ + 4))
#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
@@ -432,9 +432,9 @@ void zfcp_qdio_close(struct zfcp_adapter
/* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
req_q = &adapter->req_q;
- write_lock_irq(&req_q->lock);
+ spin_lock(&req_q->lock);
atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
- write_unlock_irq(&req_q->lock);
+ spin_unlock(&req_q->lock);
while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)
== -EINPROGRESS)
--- a/drivers/s390/scsi/zfcp_aux.c 2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c 2008-06-30 11:28:20.000000000 +0200
@@ -424,7 +424,7 @@ static void zfcp_dummy_release(struct de
int zfcp_status_read_refill(struct zfcp_adapter *adapter)
{
while (atomic_read(&adapter->stat_miss) > 0)
- if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL)) {
+ if (zfcp_fsf_status_read(adapter)) {
if (atomic_read(&adapter->stat_miss) >= 16) {
zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
return 1;
@@ -509,10 +509,10 @@ int zfcp_adapter_enqueue(struct ccw_devi
spin_lock_init(&adapter->san_dbf_lock);
spin_lock_init(&adapter->scsi_dbf_lock);
spin_lock_init(&adapter->rec_dbf_lock);
+ spin_lock_init(&adapter->req_q.lock);
rwlock_init(&adapter->erp_lock);
rwlock_init(&adapter->abort_lock);
- rwlock_init(&adapter->req_q.lock);
sema_init(&adapter->erp_ready_sem, 0);
--
--
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