X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fs390%2Fscsi%2Fzfcp_scsi.c;h=4d2bc7981324b4fc5abe939fbcca0f26895e0c91;hb=6e9a4738c9fadb7cbdcabc1e3b415159f3741ed9;hp=46e14f22ec18fd004b2af2aece837cdba54e73e8;hpb=2a2ed2db353d949c06b6ef8b6913f65b39111eab;p=powerpc.git diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index 46e14f22ec..4d2bc79813 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -30,7 +30,6 @@ static int zfcp_scsi_queuecommand(struct scsi_cmnd *, void (*done) (struct scsi_cmnd *)); static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *); static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *); -static int zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *); static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *); static int zfcp_task_management_function(struct zfcp_unit *, u8, struct scsi_cmnd *); @@ -40,37 +39,27 @@ static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, static struct device_attribute *zfcp_sysfs_sdev_attrs[]; -struct scsi_transport_template *zfcp_transport_template; - struct zfcp_data zfcp_data = { .scsi_host_template = { - name: ZFCP_NAME, - proc_name: "zfcp", - proc_info: NULL, - detect: NULL, - slave_alloc: zfcp_scsi_slave_alloc, - slave_configure: zfcp_scsi_slave_configure, - slave_destroy: zfcp_scsi_slave_destroy, - queuecommand: zfcp_scsi_queuecommand, - eh_abort_handler: zfcp_scsi_eh_abort_handler, - eh_device_reset_handler: zfcp_scsi_eh_device_reset_handler, - eh_bus_reset_handler: zfcp_scsi_eh_bus_reset_handler, - eh_host_reset_handler: zfcp_scsi_eh_host_reset_handler, - /* FIXME(openfcp): Tune */ - can_queue: 4096, - this_id: -1, - /* - * FIXME: - * one less? can zfcp_create_sbale cope with it? - */ - sg_tablesize: ZFCP_MAX_SBALES_PER_REQ, - cmd_per_lun: 1, - unchecked_isa_dma: 0, - use_clustering: 1, - sdev_attrs: zfcp_sysfs_sdev_attrs, + .name = ZFCP_NAME, + .module = THIS_MODULE, + .proc_name = "zfcp", + .slave_alloc = zfcp_scsi_slave_alloc, + .slave_configure = zfcp_scsi_slave_configure, + .slave_destroy = zfcp_scsi_slave_destroy, + .queuecommand = zfcp_scsi_queuecommand, + .eh_abort_handler = zfcp_scsi_eh_abort_handler, + .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, + .eh_bus_reset_handler = zfcp_scsi_eh_host_reset_handler, + .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, + .can_queue = 4096, + .this_id = -1, + .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, + .cmd_per_lun = 1, + .use_clustering = 1, + .sdev_attrs = zfcp_sysfs_sdev_attrs, }, .driver_version = ZFCP_VERSION, - /* rest initialised with zeros */ }; /* Find start of Response Information in FCP response unit*/ @@ -177,8 +166,14 @@ zfcp_scsi_slave_alloc(struct scsi_device *sdp) return retval; } -static void -zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) +/** + * zfcp_scsi_slave_destroy - called when scsi device is removed + * + * Remove reference to associated scsi device for an zfcp_unit. + * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs + * or a scan for this device might have failed. + */ +static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) { struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; @@ -186,6 +181,7 @@ zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); sdpnt->hostdata = NULL; unit->device = NULL; + zfcp_erp_unit_failed(unit); zfcp_unit_put(unit); } else { ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at " @@ -235,7 +231,7 @@ zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) */ int zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, - struct scsi_cmnd *scpnt, struct timer_list *timer) + struct scsi_cmnd *scpnt, int use_timer) { int tmp; int retval; @@ -271,7 +267,7 @@ zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit, goto out; } - tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, timer, + tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer, ZFCP_REQ_AUTO_CLEANUP); if (unlikely(tmp < 0)) { @@ -295,21 +291,22 @@ zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt) * zfcp_scsi_command_sync - send a SCSI command and wait for completion * @unit: unit where command is sent to * @scpnt: scsi command to be sent - * @timer: timer to be started if request is successfully initiated + * @use_timer: indicates whether timer should be setup or not * Return: 0 * * Errors are indicated in scpnt->result */ int zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt, - struct timer_list *timer) + int use_timer) { int ret; - DECLARE_COMPLETION(wait); + DECLARE_COMPLETION_ONSTACK(wait); scpnt->SCp.ptr = (void *) &wait; /* silent re-use */ scpnt->scsi_done = zfcp_scsi_command_sync_handler; - ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, timer); + ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt, + use_timer); if (ret == 0) wait_for_completion(&wait); @@ -345,7 +342,7 @@ zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; unit = (struct zfcp_unit *) scpnt->device->hostdata; - return zfcp_scsi_command_async(adapter, unit, scpnt, NULL); + return zfcp_scsi_command_async(adapter, unit, scpnt, 0); } static struct zfcp_unit * @@ -382,16 +379,15 @@ zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id, * will handle late commands. (Usually, the normal completion of late * commands is ignored with respect to the running abort operation.) */ -int -zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) +int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) { struct Scsi_Host *scsi_host; struct zfcp_adapter *adapter; struct zfcp_unit *unit; - int retval = SUCCESS; - struct zfcp_fsf_req *new_fsf_req = NULL; - struct zfcp_fsf_req *old_fsf_req; + struct zfcp_fsf_req *fsf_req; unsigned long flags; + unsigned long old_req_id; + int retval = SUCCESS; scsi_host = scpnt->device->host; adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; @@ -403,55 +399,47 @@ zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) /* avoid race condition between late normal completion and abort */ write_lock_irqsave(&adapter->abort_lock, flags); - /* - * Check whether command has just completed and can not be aborted. - * Even if the command has just been completed late, we can access - * scpnt since the SCSI stack does not release it at least until - * this routine returns. (scpnt is parameter passed to this routine - * and must not disappear during abort even on late completion.) - */ - old_fsf_req = (struct zfcp_fsf_req *) scpnt->host_scribble; - if (!old_fsf_req) { + /* Check whether corresponding fsf_req is still pending */ + spin_lock(&adapter->req_list_lock); + fsf_req = zfcp_reqlist_ismember(adapter, (unsigned long) + scpnt->host_scribble); + spin_unlock(&adapter->req_list_lock); + if (!fsf_req) { write_unlock_irqrestore(&adapter->abort_lock, flags); - zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, NULL); + zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0); retval = SUCCESS; goto out; } - old_fsf_req->data = 0; - old_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; + fsf_req->data = 0; + fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; + old_req_id = fsf_req->req_id; - /* don't access old_fsf_req after releasing the abort_lock */ + /* don't access old fsf_req after releasing the abort_lock */ write_unlock_irqrestore(&adapter->abort_lock, flags); - /* call FSF routine which does the abort */ - new_fsf_req = zfcp_fsf_abort_fcp_command((unsigned long) old_fsf_req, - adapter, unit, 0); - if (!new_fsf_req) { + + fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0); + if (!fsf_req) { ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n"); zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, - old_fsf_req); + old_req_id); retval = FAILED; goto out; } - /* wait for completion of abort */ - __wait_event(new_fsf_req->completion_wq, - new_fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); + __wait_event(fsf_req->completion_wq, + fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); - /* status should be valid since signals were not permitted */ - if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { - zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, new_fsf_req, - NULL); + if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { + zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0); retval = SUCCESS; - } else if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { - zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, new_fsf_req, - NULL); + } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { + zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0); retval = SUCCESS; } else { - zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, new_fsf_req, - NULL); + zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0); retval = FAILED; } - zfcp_fsf_req_free(new_fsf_req); + zfcp_fsf_req_free(fsf_req); out: return retval; } @@ -550,33 +538,19 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, } /** - * zfcp_scsi_eh_bus_reset_handler - reset bus (reopen adapter) + * zfcp_scsi_eh_host_reset_handler - handler for host and bus reset */ -int -zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *scpnt) +int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { - struct zfcp_unit *unit = (struct zfcp_unit*) scpnt->device->hostdata; - struct zfcp_adapter *adapter = unit->port->adapter; - - ZFCP_LOG_NORMAL("bus reset because of problems with " - "unit 0x%016Lx\n", unit->fcp_lun); - zfcp_erp_adapter_reopen(adapter, 0); - zfcp_erp_wait(adapter); - - return SUCCESS; -} + struct zfcp_unit *unit; + struct zfcp_adapter *adapter; -/** - * zfcp_scsi_eh_host_reset_handler - reset host (reopen adapter) - */ -int -zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) -{ - struct zfcp_unit *unit = (struct zfcp_unit*) scpnt->device->hostdata; - struct zfcp_adapter *adapter = unit->port->adapter; + unit = (struct zfcp_unit*) scpnt->device->hostdata; + adapter = unit->port->adapter; - ZFCP_LOG_NORMAL("host reset because of problems with " + ZFCP_LOG_NORMAL("host/bus reset because of problems with " "unit 0x%016Lx\n", unit->fcp_lun); + zfcp_erp_adapter_reopen(adapter, 0); zfcp_erp_wait(adapter); @@ -607,7 +581,7 @@ zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) adapter->scsi_host->max_channel = 0; adapter->scsi_host->unique_id = unique_id++; /* FIXME */ adapter->scsi_host->max_cmd_len = ZFCP_MAX_SCSI_CMND_LENGTH; - adapter->scsi_host->transportt = zfcp_transport_template; + adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; /* * save a pointer to our own adapter data structure within @@ -648,16 +622,6 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) return; } - -void -zfcp_fsf_start_scsi_er_timer(struct zfcp_adapter *adapter) -{ - adapter->scsi_er_timer.function = zfcp_fsf_scsi_er_timeout_handler; - adapter->scsi_er_timer.data = (unsigned long) adapter; - adapter->scsi_er_timer.expires = jiffies + ZFCP_SCSI_ER_TIMEOUT; - add_timer(&adapter->scsi_er_timer); -} - /* * Support functions for FC transport class */