diff options
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 45 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_dbf.c | 3 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 26 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 114 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 18 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 178 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 815 |
7 files changed, 412 insertions, 787 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 735f7af43d6a..7084a6ae1096 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -606,7 +606,6 @@ static void _zfcp_status_read_scheduler(struct work_struct *work) struct zfcp_adapter * zfcp_adapter_enqueue(struct ccw_device *ccw_device) { - int retval = 0; struct zfcp_adapter *adapter; /* @@ -627,19 +626,11 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) /* save ccw_device pointer */ adapter->ccw_device = ccw_device; - retval = zfcp_qdio_allocate_queues(adapter); - if (retval) - goto queues_alloc_failed; - - retval = zfcp_qdio_allocate(adapter); - if (retval) + if (zfcp_qdio_allocate(adapter)) goto qdio_allocate_failed; - retval = zfcp_allocate_low_mem_buffers(adapter); - if (retval) { - ZFCP_LOG_INFO("error: pool allocation failed\n"); + if (zfcp_allocate_low_mem_buffers(adapter)) goto failed_low_mem_buffers; - } /* initialise reference count stuff */ atomic_set(&adapter->refcount, 0); @@ -653,11 +644,8 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) /* initialize list of fsf requests */ spin_lock_init(&adapter->req_list_lock); - retval = zfcp_reqlist_alloc(adapter); - if (retval) { - ZFCP_LOG_INFO("request list initialization failed\n"); + if (zfcp_reqlist_alloc(adapter)) goto failed_low_mem_buffers; - } /* initialize debug locks */ @@ -666,8 +654,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) spin_lock_init(&adapter->scsi_dbf_lock); spin_lock_init(&adapter->rec_dbf_lock); - retval = zfcp_adapter_debug_register(adapter); - if (retval) + if (zfcp_adapter_debug_register(adapter)) goto debug_register_failed; /* initialize error recovery stuff */ @@ -685,7 +672,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) init_waitqueue_head(&adapter->erp_done_wqh); /* initialize lock of associated request queue */ - rwlock_init(&adapter->request_queue.queue_lock); + rwlock_init(&adapter->req_q.lock); INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); /* mark adapter unusable as long as sysfs registration is not complete */ @@ -723,12 +710,8 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) zfcp_reqlist_free(adapter); failed_low_mem_buffers: zfcp_free_low_mem_buffers(adapter); - if (qdio_free(ccw_device) != 0) - ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); qdio_allocate_failed: - zfcp_qdio_free_queues(adapter); - queues_alloc_failed: + zfcp_qdio_free(adapter); kfree(adapter); adapter = NULL; out: @@ -757,10 +740,6 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) retval = zfcp_reqlist_isempty(adapter); spin_unlock_irqrestore(&adapter->req_list_lock, flags); if (!retval) { - ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " - "%i requests outstanding\n", - zfcp_get_busid_by_adapter(adapter), adapter, - atomic_read(&adapter->reqs_active)); retval = -EBUSY; goto out; } @@ -775,19 +754,9 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) /* decrease number of adapters in list */ zfcp_data.adapters--; - ZFCP_LOG_TRACE("adapter %s (%p) removed from list, " - "%i adapters still in list\n", - zfcp_get_busid_by_adapter(adapter), - adapter, zfcp_data.adapters); - - retval = qdio_free(adapter->ccw_device); - if (retval) - ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n", - zfcp_get_busid_by_adapter(adapter)); + zfcp_qdio_free(adapter); zfcp_free_low_mem_buffers(adapter); - /* free memory of adapter data structure and queues */ - zfcp_qdio_free_queues(adapter); zfcp_reqlist_free(adapter); kfree(adapter->fc_stats); kfree(adapter->stats_reset_data); diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c index 01e817abe0a5..c47c23a01c7f 100644 --- a/drivers/s390/scsi/zfcp_dbf.c +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -603,13 +603,14 @@ static const char *zfcp_rec_dbf_ids[] = { [137] = "hbaapi port open", [138] = "hbaapi unit open", [139] = "hbaapi unit shutdown", - [140] = "qdio error", + [140] = "qdio error outbound", [141] = "scsi host reset", [142] = "dismissing fsf request for recovery action", [143] = "recovery action timed out", [144] = "recovery action gone", [145] = "recovery action being processed", [146] = "recovery action ready for next step", + [147] = "qdio error inbound", }; static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view, diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 72f225817ebd..5fcb555e1484 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -112,21 +112,10 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) /* max. number of (data buffer) SBALEs in largest SBAL chain multiplied with number of sectors per 4k block */ -/* 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)) - #define ZFCP_SBAL_TIMEOUT (5*HZ) #define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */ -/* queue polling (values in microseconds) */ -#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ -#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ -#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ -#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ - -#define QDIO_SCSI_QFMT 1 /* 1 for FSF */ #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer)) /********************* FSF SPECIFIC DEFINES *********************************/ @@ -649,13 +638,13 @@ struct zfcp_send_els { }; struct zfcp_qdio_queue { - struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ - u8 free_index; /* index of next free bfr + struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ + u8 first; /* index of next free bfr in queue (free_count>0) */ - atomic_t free_count; /* number of free buffers + atomic_t count; /* number of free buffers in queue */ - rwlock_t queue_lock; /* lock for operations on queue */ - int distance_from_int; /* SBALs used since PCI indication + rwlock_t lock; /* lock for operations on queue */ + int pci_batch; /* SBALs since PCI indication was last set */ }; @@ -711,15 +700,14 @@ struct zfcp_adapter { struct list_head port_remove_lh; /* head of ports to be removed */ u32 ports; /* number of remote ports */ - atomic_t reqs_active; /* # active FSF reqs */ unsigned long req_no; /* unique FSF req number */ struct list_head *req_list; /* list of pending reqs */ spinlock_t req_list_lock; /* request list lock */ - struct zfcp_qdio_queue request_queue; /* request queue */ + struct zfcp_qdio_queue req_q; /* request queue */ u32 fsf_req_seq_no; /* FSF cmnd seq number */ wait_queue_head_t request_wq; /* can be used to wait for more avaliable SBALs */ - struct zfcp_qdio_queue response_queue; /* response queue */ + struct zfcp_qdio_queue resp_q; /* response queue */ rwlock_t abort_lock; /* Protects against SCSI stack abort/command completion races */ diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index ee19be13e708..4a6d08363d4b 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -114,41 +114,6 @@ static void zfcp_erp_action_to_running(struct zfcp_erp_action *); static void zfcp_erp_memwait_handler(unsigned long); /** - * zfcp_close_qdio - close qdio queues for an adapter - */ -static void zfcp_close_qdio(struct zfcp_adapter *adapter) -{ - struct zfcp_qdio_queue *req_queue; - int first, count; - - if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) - return; - - /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ - req_queue = &adapter->request_queue; - write_lock_irq(&req_queue->queue_lock); - atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); - write_unlock_irq(&req_queue->queue_lock); - - while (qdio_shutdown(adapter->ccw_device, - QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - ssleep(1); - - /* cleanup used outbound sbals */ - count = atomic_read(&req_queue->free_count); - if (count < QDIO_MAX_BUFFERS_PER_Q) { - first = (req_queue->free_index+count) % QDIO_MAX_BUFFERS_PER_Q; - count = QDIO_MAX_BUFFERS_PER_Q - count; - zfcp_qdio_zero_sbals(req_queue->buffer, first, count); - } - req_queue->free_index = 0; - atomic_set(&req_queue->free_count, 0); - req_queue->distance_from_int = 0; - adapter->response_queue.free_index = 0; - atomic_set(&adapter->response_queue.free_count, 0); -} - -/** * zfcp_close_fsf - stop FSF operations for an adapter * * Dismiss and cleanup all pending fsf_reqs (this wakes up all initiators of @@ -158,7 +123,7 @@ static void zfcp_close_qdio(struct zfcp_adapter *adapter) static void zfcp_close_fsf(struct zfcp_adapter *adapter) { /* close queues to ensure that buffers are not accessed by adapter */ - zfcp_close_qdio(adapter); + zfcp_qdio_close(adapter); zfcp_fsf_req_dismiss_all(adapter); /* reset FSF request sequence number */ adapter->fsf_req_seq_no = 0; @@ -1735,88 +1700,17 @@ zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) { - int retval; - int i; - volatile struct qdio_buffer_element *sbale; struct zfcp_adapter *adapter = erp_action->adapter; - if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { - ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on " - "adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_sanity; - } - - if (qdio_establish(&adapter->qdio_init_data) != 0) { - ZFCP_LOG_INFO("error: establishment of QDIO queues failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_qdio_establish; - } - - if (qdio_activate(adapter->ccw_device, 0) != 0) { - ZFCP_LOG_INFO("error: activation of QDIO queues failed " - "on adapter %s\n", - zfcp_get_busid_by_adapter(adapter)); - goto failed_qdio_activate; - } - - /* - * put buffers into response queue, - */ - for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { - sbale = &(adapter->response_queue.buffer[i]->element[0]); - sbale->length = 0; - sbale->flags = SBAL_FLAGS_LAST_ENTRY; - sbale->addr = NULL; - } - - ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " - "queue_no=%i, index_in_queue=%i, count=%i)\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q); - - retval = do_QDIO(adapter->ccw_device, - QDIO_FLAG_SYNC_INPUT, - 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL); - - if (retval) { - ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n", - retval); - goto failed_do_qdio; - } else { - adapter->response_queue.free_index = 0; - atomic_set(&adapter->response_queue.free_count, 0); - ZFCP_LOG_DEBUG("%i buffers successfully enqueued to " - "response queue\n", QDIO_MAX_BUFFERS_PER_Q); - } - /* set index of first avalable SBALS / number of available SBALS */ - adapter->request_queue.free_index = 0; - atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q); - adapter->request_queue.distance_from_int = 0; + if (zfcp_qdio_open(adapter)) + return ZFCP_ERP_FAILED; /* initialize waitqueue used to wait for free SBALs in requests queue */ init_waitqueue_head(&adapter->request_wq); /* ok, we did it - skip all cleanups for different failures */ atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); - retval = ZFCP_ERP_SUCCEEDED; - goto out; - - failed_do_qdio: - /* NOP */ - - failed_qdio_activate: - while (qdio_shutdown(adapter->ccw_device, - QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) - ssleep(1); - - failed_qdio_establish: - failed_sanity: - retval = ZFCP_ERP_FAILED; - - out: - return retval; + return ZFCP_ERP_SUCCEEDED; } diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 867972898cb1..6ffe2068ba8a 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -57,21 +57,17 @@ extern int zfcp_ccw_register(void); extern void zfcp_qdio_zero_sbals(struct qdio_buffer **, int, int); extern int zfcp_qdio_allocate(struct zfcp_adapter *); -extern int zfcp_qdio_allocate_queues(struct zfcp_adapter *); -extern void zfcp_qdio_free_queues(struct zfcp_adapter *); -extern int zfcp_qdio_determine_pci(struct zfcp_qdio_queue *, - struct zfcp_fsf_req *); +extern void zfcp_qdio_free(struct zfcp_adapter *); +extern int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req); extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req - (struct zfcp_fsf_req *, int, int); + (struct zfcp_fsf_req *); extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr (struct zfcp_fsf_req *); extern int zfcp_qdio_sbals_from_sg - (struct zfcp_fsf_req *, unsigned long, struct scatterlist *, int, int); -extern int zfcp_qdio_sbals_from_scsicmnd - (struct zfcp_fsf_req *, unsigned long, struct scsi_cmnd *); - - + (struct zfcp_fsf_req *, unsigned long, struct scatterlist *, int); +extern int zfcp_qdio_open(struct zfcp_adapter *adapter); +extern void zfcp_qdio_close(struct zfcp_adapter *adapter); /******************************** FSF ****************************************/ extern int zfcp_fsf_open_port(struct zfcp_erp_action *); extern int zfcp_fsf_close_port(struct zfcp_erp_action *); @@ -95,7 +91,7 @@ extern int zfcp_fsf_status_read(struct zfcp_adapter *, int); 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->request_queue.queue_lock); + __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 *); diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index de42a01fc4b1..cc48a6462e6c 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -171,7 +171,6 @@ void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)); spin_lock_irqsave(&adapter->req_list_lock, flags); - atomic_set(&adapter->reqs_active, 0); for (i = 0; i < REQUEST_LIST_SIZE; i++) list_splice_init(&adapter->req_list[i], &remove_queue); spin_unlock_irqrestore(&adapter->req_list_lock, flags); @@ -726,7 +725,7 @@ zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) goto failed_req_create; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + 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; @@ -763,7 +762,7 @@ zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) failed_req_create: zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return retval; } @@ -1075,7 +1074,7 @@ zfcp_fsf_abort_fcp_command(unsigned long old_req_id, &unit->status))) goto unit_blocked; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -1098,7 +1097,7 @@ zfcp_fsf_abort_fcp_command(unsigned long old_req_id, fsf_req = NULL; out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return fsf_req; } @@ -1295,7 +1294,7 @@ zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, goto failed_req; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + 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 @@ -1311,7 +1310,7 @@ zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, /* try to use chained SBALs */ bytes = zfcp_qdio_sbals_from_sg(fsf_req, SBAL_FLAGS0_TYPE_WRITE_READ, - ct->req, ct->req_count, + ct->req, ZFCP_MAX_SBALS_PER_CT_REQ); if (bytes <= 0) { ZFCP_LOG_INFO("error: creation of CT request failed " @@ -1328,7 +1327,7 @@ zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; bytes = zfcp_qdio_sbals_from_sg(fsf_req, SBAL_FLAGS0_TYPE_WRITE_READ, - ct->resp, ct->resp_count, + ct->resp, ZFCP_MAX_SBALS_PER_CT_REQ); if (bytes <= 0) { ZFCP_LOG_INFO("error: creation of CT request failed " @@ -1387,8 +1386,7 @@ zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, } failed_req: out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return ret; } @@ -1593,7 +1591,7 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) goto port_blocked; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + 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 @@ -1609,7 +1607,7 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) /* try to use chained SBALs */ bytes = zfcp_qdio_sbals_from_sg(fsf_req, SBAL_FLAGS0_TYPE_WRITE_READ, - els->req, els->req_count, + els->req, ZFCP_MAX_SBALS_PER_ELS_REQ); if (bytes <= 0) { ZFCP_LOG_INFO("error: creation of ELS request failed " @@ -1626,7 +1624,7 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; bytes = zfcp_qdio_sbals_from_sg(fsf_req, SBAL_FLAGS0_TYPE_WRITE_READ, - els->resp, els->resp_count, + els->resp, ZFCP_MAX_SBALS_PER_ELS_REQ); if (bytes <= 0) { ZFCP_LOG_INFO("error: creation of ELS request failed " @@ -1657,7 +1655,7 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; fsf_req->data = (unsigned long) els; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); zfcp_san_dbf_event_els_request(fsf_req); @@ -1680,8 +1678,7 @@ zfcp_fsf_send_els(struct zfcp_send_els *els) failed_req: out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return ret; } @@ -1863,12 +1860,11 @@ zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) ZFCP_LOG_INFO("error: Could not create exchange configuration " "data request for adapter %s.\n", zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return retval; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -1882,8 +1878,7 @@ zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) zfcp_erp_start_timer(fsf_req); retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); if (retval) { ZFCP_LOG_INFO("error: Could not send exchange configuration " "data command on the adapter %s\n", @@ -1916,12 +1911,11 @@ zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, ZFCP_LOG_INFO("error: Could not create exchange configuration " "data request for adapter %s.\n", zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return retval; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -1936,8 +1930,7 @@ zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); if (retval) ZFCP_LOG_INFO("error: Could not send exchange configuration " "data command on the adapter %s\n", @@ -2178,12 +2171,11 @@ zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) "exchange port data request for " "the adapter %s.\n", zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return retval; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -2192,7 +2184,7 @@ zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) zfcp_erp_start_timer(fsf_req); retval = zfcp_fsf_req_send(fsf_req); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); if (retval) { ZFCP_LOG_INFO("error: Could not send an exchange port data " @@ -2237,21 +2229,20 @@ zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, "exchange port data request for " "the adapter %s.\n", zfcp_get_busid_by_adapter(adapter)); - write_unlock_irqrestore(&adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return retval; } if (data) fsf_req->data = (unsigned long) data; - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_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->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); if (retval) ZFCP_LOG_INFO("error: Could not send an exchange port data " @@ -2355,7 +2346,7 @@ zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -2382,8 +2373,7 @@ zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) zfcp_get_busid_by_adapter(erp_action->adapter), erp_action->port->wwpn); out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); return retval; } @@ -2587,7 +2577,7 @@ zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -2615,8 +2605,7 @@ zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) zfcp_get_busid_by_adapter(erp_action->adapter), erp_action->port->wwpn); out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); return retval; } @@ -2716,7 +2705,7 @@ zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -2746,8 +2735,7 @@ zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) zfcp_get_busid_by_adapter(erp_action->adapter), erp_action->port->wwpn); out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); return retval; } @@ -2911,7 +2899,7 @@ zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -2944,8 +2932,7 @@ zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) zfcp_get_busid_by_adapter(erp_action->adapter), erp_action->port->wwpn, erp_action->unit->fcp_lun); out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); return retval; } @@ -3226,7 +3213,7 @@ zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) goto out; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -3255,8 +3242,7 @@ zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) zfcp_get_busid_by_adapter(erp_action->adapter), erp_action->port->wwpn, erp_action->unit->fcp_lun); out: - write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, - lock_flags); + write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); return retval; } @@ -3498,7 +3484,9 @@ zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); /* generate SBALEs from data buffer */ - real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); + 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) { ZFCP_LOG_DEBUG( @@ -3556,7 +3544,7 @@ zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, scsi_cmnd->host_scribble = NULL; success: failed_req_create: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return retval; } @@ -3609,7 +3597,7 @@ zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, fsf_req->qtcb->bottom.io.fcp_cmnd_length = sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -3629,7 +3617,7 @@ zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, fsf_req = NULL; out: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return fsf_req; } @@ -4216,7 +4204,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, goto unlock_queue_lock; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale[0].flags |= direction; bottom = &fsf_req->qtcb->bottom.support; @@ -4224,7 +4212,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, bottom->option = fsf_cfdc->option; bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, - fsf_cfdc->sg, ZFCP_CFDC_PAGES, + fsf_cfdc->sg, ZFCP_MAX_SBALS_PER_REQ); if (bytes != ZFCP_CFDC_MAX_SIZE) { retval = -ENOMEM; @@ -4237,7 +4225,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, retval = -EPERM; goto free_fsf_req; } - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); wait_event(fsf_req->completion_wq, fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); @@ -4247,7 +4235,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, free_fsf_req: zfcp_fsf_req_free(fsf_req); unlock_queue_lock: - write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); + write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); return ERR_PTR(retval); } @@ -4261,10 +4249,10 @@ static inline int zfcp_fsf_req_sbal_check(unsigned long *flags, struct zfcp_qdio_queue *queue, int needed) { - write_lock_irqsave(&queue->queue_lock, *flags); - if (likely(atomic_read(&queue->free_count) >= needed)) + write_lock_irqsave(&queue->lock, *flags); + if (likely(atomic_read(&queue->count) >= needed)) return 1; - write_unlock_irqrestore(&queue->queue_lock, *flags); + write_unlock_irqrestore(&queue->lock, *flags); return 0; } @@ -4293,24 +4281,24 @@ zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) * @req_flags: flags indicating whether to wait for needed SBAL or not * @lock_flags: lock_flags if queue_lock is taken * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS - * Locks: lock adapter->request_queue->queue_lock on success + * 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_queue = &adapter->request_queue; + 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_queue, 1), + 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_queue, 1)) + } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_q, 1)) return -EIO; return 0; @@ -4340,7 +4328,7 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, volatile struct qdio_buffer_element *sbale; struct zfcp_fsf_req *fsf_req = NULL; int ret = 0; - struct zfcp_qdio_queue *req_queue = &adapter->request_queue; + struct zfcp_qdio_queue *req_q = &adapter->req_q; /* allocate new FSF request */ fsf_req = zfcp_fsf_req_alloc(pool, req_flags); @@ -4377,7 +4365,7 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, */ if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { - write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); + write_unlock_irqrestore(&req_q->lock, *lock_flags); ret = -EIO; goto failed_sbals; } @@ -4387,15 +4375,15 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; } fsf_req->sbal_number = 1; - fsf_req->sbal_first = req_queue->free_index; - fsf_req->sbal_last = req_queue->free_index; + fsf_req->sbal_first = req_q->first; + fsf_req->sbal_last = req_q->first; fsf_req->sbale_curr = 1; if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; } - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); /* setup common SBALE fields */ sbale[0].addr = (void *) fsf_req->req_id; @@ -4416,7 +4404,7 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, fsf_req = NULL; failed_fsf_req: - write_lock_irqsave(&req_queue->queue_lock, *lock_flags); + write_lock_irqsave(&req_q->lock, *lock_flags); success: *fsf_req_p = fsf_req; return ret; @@ -4433,18 +4421,17 @@ zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) { struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *req_queue; + struct zfcp_qdio_queue *req_q; volatile struct qdio_buffer_element *sbale; int inc_seq_no; - int new_distance_from_int; int retval = 0; adapter = fsf_req->adapter; - req_queue = &adapter->request_queue, + req_q = &adapter->req_q; /* FIXME(debug): remove it later */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, @@ -4457,52 +4444,24 @@ static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) inc_seq_no = (fsf_req->qtcb != NULL); - ZFCP_LOG_TRACE("request queue of adapter %s: " - "next free SBAL is %i, %i free SBALs\n", - zfcp_get_busid_by_adapter(adapter), - req_queue->free_index, - atomic_read(&req_queue->free_count)); - - ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " - "index_in_queue=%i, count=%i, buffers=%p\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_OUTPUT, - 0, fsf_req->sbal_first, fsf_req->sbal_number, - &req_queue->buffer[fsf_req->sbal_first]); - - /* - * adjust the number of free SBALs in request queue as well as - * position of first one - */ - atomic_sub(fsf_req->sbal_number, &req_queue->free_count); - ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); - req_queue->free_index += fsf_req->sbal_number; /* increase */ - req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ - new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); - fsf_req->issued = get_clock(); - retval = do_QDIO(adapter->ccw_device, - QDIO_FLAG_SYNC_OUTPUT, - 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); + retval = zfcp_qdio_send(fsf_req); if (unlikely(retval)) { /* Queues are down..... */ - retval = -EIO; del_timer(&fsf_req->timer); spin_lock(&adapter->req_list_lock); zfcp_reqlist_remove(adapter, fsf_req); spin_unlock(&adapter->req_list_lock); /* undo changes in request queue made for this request */ - zfcp_qdio_zero_sbals(req_queue->buffer, - fsf_req->sbal_first, fsf_req->sbal_number); - atomic_add(fsf_req->sbal_number, &req_queue->free_count); - req_queue->free_index -= fsf_req->sbal_number; - req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; - req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ + 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 { - req_queue->distance_from_int = new_distance_from_int; /* * increase FSF sequence counter - * this must only be done for request successfully enqueued to @@ -4514,9 +4473,6 @@ static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) /* Don't increase for unsolicited status */ if (inc_seq_no) adapter->fsf_req_seq_no++; - - /* count FSF requests pending */ - atomic_inc(&adapter->reqs_active); } return retval; } diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index e71547357f62..bd6561d53589 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -1,241 +1,92 @@ /* - * This file is part of the zfcp device driver for - * FCP adapters for IBM System z9 and zSeries. + * zfcp device driver * - * (C) Copyright IBM Corp. 2002, 2006 + * Setup and helper functions to access QDIO. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright IBM Corporation 2002, 2008 */ #include "zfcp_ext.h" -static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *, int); -static inline volatile struct qdio_buffer_element *zfcp_qdio_sbale_get - (struct zfcp_qdio_queue *, int, int); -static inline volatile struct qdio_buffer_element *zfcp_qdio_sbale_resp - (struct zfcp_fsf_req *, int, int); -static volatile struct qdio_buffer_element *zfcp_qdio_sbal_chain - (struct zfcp_fsf_req *, unsigned long); -static volatile struct qdio_buffer_element *zfcp_qdio_sbale_next - (struct zfcp_fsf_req *, unsigned long); -static int zfcp_qdio_sbals_zero(struct zfcp_qdio_queue *, int, int); -static inline int zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *); -static void zfcp_qdio_sbale_fill - (struct zfcp_fsf_req *, unsigned long, void *, int); -static int zfcp_qdio_sbals_from_segment - (struct zfcp_fsf_req *, unsigned long, void *, unsigned long); - -static qdio_handler_t zfcp_qdio_request_handler; -static qdio_handler_t zfcp_qdio_response_handler; -static int zfcp_qdio_handler_error_check(struct zfcp_adapter *, - unsigned int, unsigned int, unsigned int, int, int); - -#define ZFCP_LOG_AREA ZFCP_LOG_AREA_QDIO +/* 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)) -/* - * Frees BUFFER memory for each of the pointers of the struct qdio_buffer array - * in the adapter struct sbuf is the pointer array. - * - * locks: must only be called with zfcp_data.config_sema taken - */ -static void -zfcp_qdio_buffers_dequeue(struct qdio_buffer **sbuf) -{ - int pos; - - for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) - free_page((unsigned long) sbuf[pos]); -} - -/* - * Allocates BUFFER memory to each of the pointers of the qdio_buffer_t - * array in the adapter struct. - * Cur_buf is the pointer array - * - * returns: zero on success else -ENOMEM - * locks: must only be called with zfcp_data.config_sema taken - */ -static int -zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbuf) +static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal) { int pos; for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos += QBUFF_PER_PAGE) { - sbuf[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); - if (!sbuf[pos]) { - zfcp_qdio_buffers_dequeue(sbuf); + sbal[pos] = (struct qdio_buffer *) get_zeroed_page(GFP_KERNEL); + if (!sbal[pos]) return -ENOMEM; - } } for (pos = 0; pos < QDIO_MAX_BUFFERS_PER_Q; pos++) if (pos % QBUFF_PER_PAGE) - sbuf[pos] = sbuf[pos - 1] + 1; + sbal[pos] = sbal[pos - 1] + 1; return 0; } -/* locks: must only be called with zfcp_data.config_sema taken */ -int -zfcp_qdio_allocate_queues(struct zfcp_adapter *adapter) +static volatile struct qdio_buffer_element * +zfcp_qdio_sbale(struct zfcp_qdio_queue *q, int sbal_idx, int sbale_idx) { - int ret; - - ret = zfcp_qdio_buffers_enqueue(adapter->request_queue.buffer); - if (ret) - return ret; - return zfcp_qdio_buffers_enqueue(adapter->response_queue.buffer); + return &q->sbal[sbal_idx]->element[sbale_idx]; } -/* locks: must only be called with zfcp_data.config_sema taken */ -void -zfcp_qdio_free_queues(struct zfcp_adapter *adapter) +/** + * zfcp_qdio_free - free memory used by request- and resposne queue + * @adapter: pointer to the zfcp_adapter structure + */ +void zfcp_qdio_free(struct zfcp_adapter *adapter) { - ZFCP_LOG_TRACE("freeing request_queue buffers\n"); - zfcp_qdio_buffers_dequeue(adapter->request_queue.buffer); - - ZFCP_LOG_TRACE("freeing response_queue buffers\n"); - zfcp_qdio_buffers_dequeue(adapter->response_queue.buffer); -} + struct qdio_buffer **sbal_req, **sbal_resp; + int p; -int -zfcp_qdio_allocate(struct zfcp_adapter *adapter) -{ - struct qdio_initialize *init_data; + if (adapter->ccw_device) + qdio_free(adapter->ccw_device); - init_data = &adapter->qdio_init_data; + sbal_req = adapter->req_q.sbal; + sbal_resp = adapter->resp_q.sbal; - init_data->cdev = adapter->ccw_device; - init_data->q_format = QDIO_SCSI_QFMT; - memcpy(init_data->adapter_name, zfcp_get_busid_by_adapter(adapter), 8); - ASCEBC(init_data->adapter_name, 8); - init_data->qib_param_field_format = 0; - init_data->qib_param_field = NULL; - init_data->input_slib_elements = NULL; - init_data->output_slib_elements = NULL; - init_data->min_input_threshold = ZFCP_MIN_INPUT_THRESHOLD; - init_data->max_input_threshold = ZFCP_MAX_INPUT_THRESHOLD; - init_data->min_output_threshold = ZFCP_MIN_OUTPUT_THRESHOLD; - init_data->max_output_threshold = ZFCP_MAX_OUTPUT_THRESHOLD; - init_data->no_input_qs = 1; - init_data->no_output_qs = 1; - init_data->input_handler = zfcp_qdio_response_handler; - init_data->output_handler = zfcp_qdio_request_handler; - init_data->int_parm = (unsigned long) adapter; - init_data->flags = QDIO_INBOUND_0COPY_SBALS | - QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; - init_data->input_sbal_addr_array = - (void **) (adapter->response_queue.buffer); - init_data->output_sbal_addr_array = - (void **) (adapter->request_queue.buffer); - - return qdio_allocate(init_data); + for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) { + free_page((unsigned long) sbal_req[p]); + free_page((unsigned long) sbal_resp[p]); + } } -/* - * function: zfcp_qdio_handler_error_check - * - * purpose: called by the response handler to determine error condition - * - * returns: error flag - * - */ -static int -zfcp_qdio_handler_error_check(struct zfcp_adapter *adapter, unsigned int status, - unsigned int qdio_error, unsigned int siga_error, - int first_element, int elements_processed) +static void zfcp_qdio_handler_error(struct zfcp_adapter *adapter, u8 id) { - int retval = 0; + dev_warn(&adapter->ccw_device->dev, "QDIO problem occurred.\n"); - if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { - retval = -EIO; - - ZFCP_LOG_INFO("QDIO problem occurred (status=0x%x, " - "qdio_error=0x%x, siga_error=0x%x)\n", - status, qdio_error, siga_error); - - zfcp_hba_dbf_event_qdio(adapter, status, qdio_error, siga_error, - first_element, elements_processed); - /* - * Restarting IO on the failed adapter from scratch. - * Since we have been using this adapter, it is save to assume - * that it is not failed but recoverable. The card seems to - * report link-up events by self-initiated queue shutdown. - * That is why we need to clear the link-down flag - * which is set again in case we have missed by a mile. - */ - zfcp_erp_adapter_reopen(adapter, - ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | - ZFCP_STATUS_COMMON_ERP_FAILED, 140, - NULL); - } - return retval; + zfcp_erp_adapter_reopen(adapter, + ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | + ZFCP_STATUS_COMMON_ERP_FAILED, id, NULL); } -/* - * function: zfcp_qdio_request_handler - * - * purpose: is called by QDIO layer for completed SBALs in request queue - * - * returns: (void) - */ -static void -zfcp_qdio_request_handler(struct ccw_device *ccw_device, - unsigned int status, - unsigned int qdio_error, - unsigned int siga_error, - unsigned int queue_number, - int first_element, - int elements_processed, - unsigned long int_parm) +static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int status, + unsigned int qdio_err, unsigned int siga_err, + unsigned int queue_no, int first, int count, + unsigned long parm) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *queue; - - adapter = (struct zfcp_adapter *) int_parm; - queue = &adapter->request_queue; + struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm; + struct zfcp_qdio_queue *queue = &adapter->req_q; - ZFCP_LOG_DEBUG("adapter %s, first=%d, elements_processed=%d\n", - zfcp_get_busid_by_adapter(adapter), - first_element, elements_processed); - - if (unlikely(zfcp_qdio_handler_error_check(adapter, status, qdio_error, - siga_error, first_element, - elements_processed))) - goto out; - /* - * we stored address of struct zfcp_adapter data structure - * associated with irq in int_parm - */ + if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { + zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err, + first, count); + zfcp_qdio_handler_error(adapter, 140); + return; + } /* cleanup all SBALs being program-owned now */ - zfcp_qdio_zero_sbals(queue->buffer, first_element, elements_processed); + zfcp_qdio_zero_sbals(queue->sbal, first, count); - /* increase free space in outbound queue */ - atomic_add(elements_processed, &queue->free_count); - ZFCP_LOG_DEBUG("free_count=%d\n", atomic_read(&queue->free_count)); + atomic_add(count, &queue->count); wake_up(&adapter->request_wq); - ZFCP_LOG_DEBUG("elements_processed=%d, free count=%d\n", - elements_processed, atomic_read(&queue->free_count)); - out: - return; } -/** - * zfcp_qdio_reqid_check - checks for valid reqids. - */ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, - unsigned long req_id, int sbal) + unsigned long req_id, int sbal_idx) { struct zfcp_fsf_req *fsf_req; unsigned long flags; @@ -248,204 +99,117 @@ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter, * Unknown request means that we have potentially memory * corruption and must stop the machine immediatly. */ - panic("error: unknown request id (%ld) on adapter %s.\n", + panic("error: unknown request id (%lx) on adapter %s.\n", req_id, zfcp_get_busid_by_adapter(adapter)); zfcp_reqlist_remove(adapter, fsf_req); - atomic_dec(&adapter->reqs_active); spin_unlock_irqrestore(&adapter->req_list_lock, flags); - fsf_req->sbal_response = sbal; - /* finish the FSF request */ + fsf_req->sbal_response = sbal_idx; zfcp_fsf_req_complete(fsf_req); } -/* - * function: zfcp_qdio_response_handler - * - * purpose: is called by QDIO layer for completed SBALs in response queue - * - * returns: (void) - */ -static void -zfcp_qdio_response_handler(struct ccw_device *ccw_device, - unsigned int status, - unsigned int qdio_error, - unsigned int siga_error, - unsigned int queue_number, - int first_element, - int elements_processed, - unsigned long int_parm) +static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed) { - struct zfcp_adapter *adapter; - struct zfcp_qdio_queue *queue; - int buffer_index; - int i; - struct qdio_buffer *buffer; - int retval = 0; - u8 count; - u8 start; - volatile struct qdio_buffer_element *buffere = NULL; - int buffere_index; - - adapter = (struct zfcp_adapter *) int_parm; - queue = &adapter->response_queue; - - if (unlikely(zfcp_qdio_handler_error_check(adapter, status, qdio_error, - siga_error, first_element, - elements_processed))) - goto out; + struct zfcp_qdio_queue *queue = &adapter->resp_q; + struct ccw_device *cdev = adapter->ccw_device; + u8 count, start = queue->first; + unsigned int retval; - /* - * we stored address of struct zfcp_adapter data structure - * associated with irq in int_parm - */ + count = atomic_read(&queue->count) + processed; + + retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, + 0, start, count, NULL); + + if (unlikely(retval)) { + atomic_set(&queue->count, count); + /* FIXME: Recover this with an adapter reopen? */ + } else { + queue->first += count; + queue->first %= QDIO_MAX_BUFFERS_PER_Q; + atomic_set(&queue->count, 0); + } +} + +static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int status, + unsigned int qdio_err, unsigned int siga_err, + unsigned int queue_no, int first, int count, + unsigned long parm) +{ + struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm; + struct zfcp_qdio_queue *queue = &adapter->resp_q; + volatile struct qdio_buffer_element *sbale; + int sbal_idx, sbale_idx, sbal_no; + + if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) { + zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err, + first, count); + zfcp_qdio_handler_error(adapter, 147); + return; + } - buffere = &(queue->buffer[first_element]->element[0]); - ZFCP_LOG_DEBUG("first BUFFERE flags=0x%x\n", buffere->flags); /* * go through all SBALs from input queue currently * returned by QDIO layer */ - - for (i = 0; i < elements_processed; i++) { - - buffer_index = first_element + i; - buffer_index %= QDIO_MAX_BUFFERS_PER_Q; - buffer = queue->buffer[buffer_index]; + for (sbal_no = 0; sbal_no < count; sbal_no++) { + sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q; /* go through all SBALEs of SBAL */ - for (buffere_index = 0; - buffere_index < QDIO_MAX_ELEMENTS_PER_BUFFER; - buffere_index++) { - - /* look for QDIO request identifiers in SB */ - buffere = &buffer->element[buffere_index]; + for (sbale_idx = 0; sbale_idx < QDIO_MAX_ELEMENTS_PER_BUFFER; + sbale_idx++) { + sbale = zfcp_qdio_sbale(queue, sbal_idx, sbale_idx); zfcp_qdio_reqid_check(adapter, - (unsigned long) buffere->addr, i); - - /* - * A single used SBALE per inbound SBALE has been - * implemented by QDIO so far. Hope they will - * do some optimisation. Will need to change to - * unlikely() then. - */ - if (likely(buffere->flags & SBAL_FLAGS_LAST_ENTRY)) + (unsigned long) sbale->addr, + sbal_idx); + if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY)) break; }; - if (unlikely(!(buffere->flags & SBAL_FLAGS_LAST_ENTRY))) { - ZFCP_LOG_NORMAL("bug: End of inbound data " - "not marked!\n"); - } + if (unlikely(!(sbale->flags & SBAL_FLAGS_LAST_ENTRY))) + dev_warn(&adapter->ccw_device->dev, + "Protocol violation by adapter. " + "Continuing operations.\n"); } /* * put range of SBALs back to response queue * (including SBALs which have already been free before) */ - count = atomic_read(&queue->free_count) + elements_processed; - start = queue->free_index; - - ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " - "queue_no=%i, index_in_queue=%i, count=%i, " - "buffers=0x%lx\n", - zfcp_get_busid_by_adapter(adapter), - QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, - 0, start, count, (unsigned long) &queue->buffer[start]); - - retval = do_QDIO(ccw_device, - QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT, - 0, start, count, NULL); - - if (unlikely(retval)) { - atomic_set(&queue->free_count, count); - ZFCP_LOG_DEBUG("clearing of inbound data regions failed, " - "queues may be down " - "(count=%d, start=%d, retval=%d)\n", - count, start, retval); - } else { - queue->free_index += count; - queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; - atomic_set(&queue->free_count, 0); - ZFCP_LOG_TRACE("%i buffers enqueued to response " - "queue at position %i\n", count, start); - } - out: - return; + zfcp_qdio_resp_put_back(adapter, count); } /** - * zfcp_qdio_sbale_get - return pointer to SBALE of qdio_queue - * @queue: queue from which SBALE should be returned - * @sbal: specifies number of SBAL in queue - * @sbale: specifes number of SBALE in SBAL - */ -static inline volatile struct qdio_buffer_element * -zfcp_qdio_sbale_get(struct zfcp_qdio_queue *queue, int sbal, int sbale) -{ - return &queue->buffer[sbal]->element[sbale]; -} - -/** - * zfcp_qdio_sbale_req - return pointer to SBALE of request_queue for - * a struct zfcp_fsf_req + * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req + * @fsf_req: pointer to struct fsf_req + * Returns: pointer to qdio_buffer_element (SBALE) structure */ volatile struct qdio_buffer_element * -zfcp_qdio_sbale_req(struct zfcp_fsf_req *fsf_req, int sbal, int sbale) -{ - return zfcp_qdio_sbale_get(&fsf_req->adapter->request_queue, - sbal, sbale); -} - -/** - * zfcp_qdio_sbale_resp - return pointer to SBALE of response_queue for - * a struct zfcp_fsf_req - */ -static inline volatile struct qdio_buffer_element * -zfcp_qdio_sbale_resp(struct zfcp_fsf_req *fsf_req, int sbal, int sbale) +zfcp_qdio_sbale_req(struct zfcp_fsf_req *req) { - return zfcp_qdio_sbale_get(&fsf_req->adapter->response_queue, - sbal, sbale); + return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, 0); } /** - * zfcp_qdio_sbale_curr - return current SBALE on request_queue for - * a struct zfcp_fsf_req + * zfcp_qdio_sbale_curr - return curr SBALE on req_q for a struct zfcp_fsf_req + * @fsf_req: pointer to struct fsf_req + * Returns: pointer to qdio_buffer_element (SBALE) structure */ volatile struct qdio_buffer_element * -zfcp_qdio_sbale_curr(struct zfcp_fsf_req *fsf_req) +zfcp_qdio_sbale_curr(struct zfcp_fsf_req *req) { - return zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, - fsf_req->sbale_curr); + return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, + req->sbale_curr); } -/** - * zfcp_qdio_sbal_limit - determine maximum number of SBALs that can be used - * on the request_queue for a struct zfcp_fsf_req - * @fsf_req: the number of the last SBAL that can be used is stored herein - * @max_sbals: used to pass an upper limit for the number of SBALs - * - * Note: We can assume at least one free SBAL in the request_queue when called. - */ -static void -zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals) +static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals) { - int count = atomic_read(&fsf_req->adapter->request_queue.free_count); + int count = atomic_read(&fsf_req->adapter->req_q.count); count = min(count, max_sbals); - fsf_req->sbal_limit = fsf_req->sbal_first; - fsf_req->sbal_limit += (count - 1); - fsf_req->sbal_limit %= QDIO_MAX_BUFFERS_PER_Q; + fsf_req->sbal_limit = (fsf_req->sbal_first + count - 1) + % QDIO_MAX_BUFFERS_PER_Q; } -/** - * zfcp_qdio_sbal_chain - chain SBALs if more than one SBAL is needed for a - * request - * @fsf_req: zfcp_fsf_req to be processed - * @sbtype: SBAL flags which have to be set in first SBALE of new SBAL - * - * This function changes sbal_last, sbale_curr, sbal_number of fsf_req. - */ static volatile struct qdio_buffer_element * zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) { @@ -460,7 +224,7 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) return NULL; /* set chaining flag in first SBALE of current SBAL */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + sbale = zfcp_qdio_sbale_req(fsf_req); sbale->flags |= SBAL_FLAGS0_MORE_SBALS; /* calculate index of next SBAL */ @@ -480,214 +244,271 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) return sbale; } -/** - * zfcp_qdio_sbale_next - switch to next SBALE, chain SBALs if needed - */ static volatile struct qdio_buffer_element * zfcp_qdio_sbale_next(struct zfcp_fsf_req *fsf_req, unsigned long sbtype) { if (fsf_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL) return zfcp_qdio_sbal_chain(fsf_req, sbtype); - fsf_req->sbale_curr++; - return zfcp_qdio_sbale_curr(fsf_req); } -/** - * zfcp_qdio_sbals_zero - initialize SBALs between first and last in queue - * with zero from - */ -static int -zfcp_qdio_sbals_zero(struct zfcp_qdio_queue *queue, int first, int last) +static void zfcp_qdio_undo_sbals(struct zfcp_fsf_req *fsf_req) { - struct qdio_buffer **buf = queue->buffer; - int curr = first; - int count = 0; - - for(;;) { - curr %= QDIO_MAX_BUFFERS_PER_Q; - count++; - memset(buf[curr], 0, sizeof(struct qdio_buffer)); - if (curr == last) - break; - curr++; - } - return count; + struct qdio_buffer **sbal = fsf_req->adapter->req_q.sbal; + int first = fsf_req->sbal_first; + int last = fsf_req->sbal_last; + int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) % + QDIO_MAX_BUFFERS_PER_Q + 1; + zfcp_qdio_zero_sbals(sbal, first, count); } - -/** - * zfcp_qdio_sbals_wipe - reset all changes in SBALs for an fsf_req - */ -static inline int -zfcp_qdio_sbals_wipe(struct zfcp_fsf_req *fsf_req) -{ - return zfcp_qdio_sbals_zero(&fsf_req->adapter->request_queue, - fsf_req->sbal_first, fsf_req->sbal_last); -} - - -/** - * zfcp_qdio_sbale_fill - set address and length in current SBALE - * on request_queue - */ -static void -zfcp_qdio_sbale_fill(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - void *addr, int length) +static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req, + unsigned int sbtype, void *start_addr, + unsigned int total_length) { volatile struct qdio_buffer_element *sbale; - - sbale = zfcp_qdio_sbale_curr(fsf_req); - sbale->addr = addr; - sbale->length = length; -} - -/** - * zfcp_qdio_sbals_from_segment - map memory segment to SBALE(s) - * @fsf_req: request to be processed - * @sbtype: SBALE flags - * @start_addr: address of memory segment - * @total_length: length of memory segment - * - * Alignment and length of the segment determine how many SBALEs are needed - * for the memory segment. - */ -static int -zfcp_qdio_sbals_from_segment(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - void *start_addr, unsigned long total_length) -{ unsigned long remaining, length; void *addr; - /* split segment up heeding page boundaries */ + /* split segment up */ for (addr = start_addr, remaining = total_length; remaining > 0; addr += length, remaining -= length) { - /* get next free SBALE for new piece */ - if (NULL == zfcp_qdio_sbale_next(fsf_req, sbtype)) { - /* no SBALE left, clean up and leave */ - zfcp_qdio_sbals_wipe(fsf_req); + sbale = zfcp_qdio_sbale_next(fsf_req, sbtype); + if (!sbale) { + zfcp_qdio_undo_sbals(fsf_req); return -EINVAL; } - /* calculate length of new piece */ + + /* new piece must not exceed next page boundary */ length = min(remaining, - (PAGE_SIZE - ((unsigned long) addr & + (PAGE_SIZE - ((unsigned long)addr & (PAGE_SIZE - 1)))); - /* fill current SBALE with calculated piece */ - zfcp_qdio_sbale_fill(fsf_req, sbtype, addr, length); + sbale->addr = addr; + sbale->length = length; } - return total_length; + return 0; } - /** * zfcp_qdio_sbals_from_sg - fill SBALs from scatter-gather list * @fsf_req: request to be processed * @sbtype: SBALE flags * @sg: scatter-gather list - * @sg_count: number of elements in scatter-gather list * @max_sbals: upper bound for number of SBALs to be used + * Returns: number of bytes, or error (negativ) */ -int -zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - struct scatterlist *sgl, int sg_count, int max_sbals) +int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, + struct scatterlist *sg, int max_sbals) { - int sg_index; - struct scatterlist *sg_segment; - int retval; volatile struct qdio_buffer_element *sbale; - int bytes = 0; + int retval, bytes = 0; /* figure out last allowed SBAL */ zfcp_qdio_sbal_limit(fsf_req, max_sbals); - /* set storage-block type for current SBAL */ - sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_last, 0); + /* set storage-block type for this request */ + sbale = zfcp_qdio_sbale_req(fsf_req); sbale->flags |= sbtype; - /* process all segements of scatter-gather list */ - for_each_sg(sgl, sg_segment, sg_count, sg_index) { - retval = zfcp_qdio_sbals_from_segment( - fsf_req, - sbtype, - zfcp_sg_to_address(sg_segment), - sg_segment->length); - if (retval < 0) { - bytes = retval; - goto out; - } else - bytes += retval; + for (; sg; sg = sg_next(sg)) { + retval = zfcp_qdio_fill_sbals(fsf_req, sbtype, sg_virt(sg), + sg->length); + if (retval < 0) + return retval; + bytes += sg->length; } + /* assume that no other SBALEs are to follow in the same SBAL */ sbale = zfcp_qdio_sbale_curr(fsf_req); sbale->flags |= SBAL_FLAGS_LAST_ENTRY; -out: + return bytes; } - /** - * zfcp_qdio_sbals_from_scsicmnd - fill SBALs from scsi command - * @fsf_req: request to be processed - * @sbtype: SBALE flags - * @scsi_cmnd: either scatter-gather list or buffer contained herein is used - * to fill SBALs + * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO + * @fsf_req: pointer to struct zfcp_fsf_req + * Returns: 0 on success, error otherwise */ -int -zfcp_qdio_sbals_from_scsicmnd(struct zfcp_fsf_req *fsf_req, - unsigned long sbtype, struct scsi_cmnd *scsi_cmnd) +int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req) { - return zfcp_qdio_sbals_from_sg(fsf_req, sbtype, scsi_sglist(scsi_cmnd), - scsi_sg_count(scsi_cmnd), - ZFCP_MAX_SBALS_PER_REQ); + struct zfcp_adapter *adapter = fsf_req->adapter; + struct zfcp_qdio_queue *req_q = &adapter->req_q; + int first = fsf_req->sbal_first; + int count = fsf_req->sbal_number; + int retval, pci, pci_batch; + volatile struct qdio_buffer_element *sbale; + + /* acknowledgements for transferred buffers */ + pci_batch = req_q->pci_batch + count; + if (unlikely(pci_batch >= ZFCP_QDIO_PCI_INTERVAL)) { + pci_batch %= ZFCP_QDIO_PCI_INTERVAL; + pci = first + count - (pci_batch + 1); + pci %= QDIO_MAX_BUFFERS_PER_Q; + sbale = zfcp_qdio_sbale(req_q, pci, 0); + sbale->flags |= SBAL_FLAGS0_PCI; + } + + retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, first, + count, NULL); + if (unlikely(retval)) { + zfcp_qdio_zero_sbals(req_q->sbal, first, count); + return retval; + } + + /* account for transferred buffers */ + atomic_sub(count, &req_q->count); + req_q->first += count; + req_q->first %= QDIO_MAX_BUFFERS_PER_Q; + req_q->pci_batch = pci_batch; + return 0; } /** - * zfcp_qdio_determine_pci - set PCI flag in first SBALE on qdio queue if needed + * zfcp_qdio_zero_sbals - zero all sbals of the specified area and queue + * @buf: pointer to array of SBALS + * @first: integer specifying the SBAL number to start + * @count: integer specifying the number of SBALS to process */ -int -zfcp_qdio_determine_pci(struct zfcp_qdio_queue *req_queue, - struct zfcp_fsf_req *fsf_req) +void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int count) { - int new_distance_from_int; - int pci_pos; - volatile struct qdio_buffer_element *sbale; + int i, sbal_idx; - new_distance_from_int = req_queue->distance_from_int + - fsf_req->sbal_number; - - if (unlikely(new_distance_from_int >= ZFCP_QDIO_PCI_INTERVAL)) { - new_distance_from_int %= ZFCP_QDIO_PCI_INTERVAL; - pci_pos = fsf_req->sbal_first; - pci_pos += fsf_req->sbal_number; - pci_pos -= new_distance_from_int; - pci_pos -= 1; - pci_pos %= QDIO_MAX_BUFFERS_PER_Q; - sbale = zfcp_qdio_sbale_req(fsf_req, pci_pos, 0); - sbale->flags |= SBAL_FLAGS0_PCI; + for (i = first; i < first + count; i++) { + sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q; + memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer)); } - return new_distance_from_int; } -/* - * function: zfcp_zero_sbals - * - * purpose: zeros specified range of SBALs - * - * returns: +/** + * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data + * @adapter: pointer to struct zfcp_adapter + * Returns: -ENOMEM on memory allocation error or return value from + * qdio_allocate + */ +int zfcp_qdio_allocate(struct zfcp_adapter *adapter) +{ + struct qdio_initialize *init_data; + + if (zfcp_qdio_buffers_enqueue(adapter->req_q.sbal) || + zfcp_qdio_buffers_enqueue(adapter->resp_q.sbal)) + return -ENOMEM; + + init_data = &adapter->qdio_init_data; + + init_data->cdev = adapter->ccw_device; + init_data->q_format = QDIO_ZFCP_QFMT; + memcpy(init_data->adapter_name, zfcp_get_busid_by_adapter(adapter), 8); + ASCEBC(init_data->adapter_name, 8); + init_data->qib_param_field_format = 0; + init_data->qib_param_field = NULL; + init_data->input_slib_elements = NULL; + init_data->output_slib_elements = NULL; + init_data->min_input_threshold = 1; + init_data->max_input_threshold = 5000; + init_data->min_output_threshold = 1; + init_data->max_output_threshold = 1000; + init_data->no_input_qs = 1; + init_data->no_output_qs = 1; + init_data->input_handler = zfcp_qdio_int_resp; + init_data->output_handler = zfcp_qdio_int_req; + init_data->int_parm = (unsigned long) adapter; + init_data->flags = QDIO_INBOUND_0COPY_SBALS | + QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS; + init_data->input_sbal_addr_array = + (void **) (adapter->resp_q.sbal); + init_data->output_sbal_addr_array = + (void **) (adapter->req_q.sbal); + + return qdio_allocate(init_data); +} + +/** + * zfcp_close_qdio - close qdio queues for an adapter */ -void -zfcp_qdio_zero_sbals(struct qdio_buffer *buf[], int first, int clean_count) +void zfcp_qdio_close(struct zfcp_adapter *adapter) { - int cur_pos; - int index; - - for (cur_pos = first; cur_pos < (first + clean_count); cur_pos++) { - index = cur_pos % QDIO_MAX_BUFFERS_PER_Q; - memset(buf[index], 0, sizeof (struct qdio_buffer)); - ZFCP_LOG_TRACE("zeroing BUFFER %d at address %p\n", - index, buf[index]); + struct zfcp_qdio_queue *req_q; + int first, count; + + if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) + return; + + /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */ + req_q = &adapter->req_q; + write_lock_irq(&req_q->lock); + atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); + write_unlock_irq(&req_q->lock); + + while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) + == -EINPROGRESS) + ssleep(1); + + /* cleanup used outbound sbals */ + count = atomic_read(&req_q->count); + if (count < QDIO_MAX_BUFFERS_PER_Q) { + first = (req_q->first + count) % QDIO_MAX_BUFFERS_PER_Q; + count = QDIO_MAX_BUFFERS_PER_Q - count; + zfcp_qdio_zero_sbals(req_q->sbal, first, count); } + req_q->first = 0; + atomic_set(&req_q->count, 0); + req_q->pci_batch = 0; + adapter->resp_q.first = 0; + atomic_set(&adapter->resp_q.count, 0); } -#undef ZFCP_LOG_AREA +/** + * zfcp_qdio_open - prepare and initialize response queue + * @adapter: pointer to struct zfcp_adapter + * Returns: 0 on success, otherwise -EIO + */ +int zfcp_qdio_open(struct zfcp_adapter *adapter) +{ + volatile struct qdio_buffer_element *sbale; + int cc; + + if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) + return -EIO; + + if (qdio_establish(&adapter->qdio_init_data)) { + dev_err(&adapter->ccw_device->dev, + "Establish of QDIO queues failed.\n"); + return -EIO; + } + + if (qdio_activate(adapter->ccw_device, 0)) { + dev_err(&adapter->ccw_device->dev, + "Activate of QDIO queues failed.\n"); + goto failed_qdio; + } + + for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) { + sbale = &(adapter->resp_q.sbal[cc]->element[0]); + sbale->length = 0; + sbale->flags = SBAL_FLAGS_LAST_ENTRY; + sbale->addr = NULL; + } + + if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0, + QDIO_MAX_BUFFERS_PER_Q, NULL)) { + dev_err(&adapter->ccw_device->dev, + "Init of QDIO response queue failed.\n"); + goto failed_qdio; + } + + /* set index of first avalable SBALS / number of available SBALS */ + adapter->req_q.first = 0; + atomic_set(&adapter->req_q.count, QDIO_MAX_BUFFERS_PER_Q); + adapter->req_q.pci_batch = 0; + + return 0; + +failed_qdio: + while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR) + == -EINPROGRESS) + ssleep(1); + + return -EIO; +} |