- 05 Sep, 2009 28 commits
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Heiko Carstens authored
Remove expensive ktime_get()/ktime_us_delta() functions from the hot path and use get_clock_monotonic() instead. This elimates seven function calls and avoids a lot of unnecessary calculations. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by:
James Bottomley <James.Bottomley@suse.de>
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Christof Schmitt authored
The timestamp calculation used for s390dbf output is the same in a private zfcp function and in debug.c. Replace both with a common inline function. Reviewed-by:
Swen Schillig <swen@vnet.ibm.com> Signed-off-by:
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Christof Schmitt authored
dev_set_name tries to allocate memory, so check the return value for allocation failures. After dev_set_name succeeds, call device_register as next step to be able to use put_device during error handling. Reviewed-by:
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Sebastian Ott authored
Don't use kfree directly after device registration started. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Christof Schmitt authored
The config semaphore is only used as a mutex, so replace it with a simple mutex. Reviewed-by:
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Christof Schmitt authored
So far, zfcp allocated all resources required for FCP adapters/subchannels when the device was discovered in the ccw_probe callback. If there are lots of unused FCP subchannels attached to a system, this is a waste of resources. To alleviate this, defer the resource allocation to the first call to ccw_set_online. To avoid disruptions during possible following calls to ccw_set_offline and then ccw_set_online, keep the adapter resources until the device is finally being removed via ccw_remove. While doing this, also manage the zfcp erp thread together with all other adapter resources in zfcp_adapter_enqueue/dequeue. Reviewed-by:
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Christof Schmitt authored
The recommendation for a timeout of 2 * R_A_TOV is the same for ct/gs and els requests, so set it in the common function used for initializing both request types. Besides, the timer inside zfcp should only run longer than the timeout set for the channel, so 10 seconds more should be enough (instead of 60 seconds). Reviewed-by:
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Christof Schmitt authored
Switch the creation of the zfcp erp thread from the deprecated kernel_thread API to the kthread API. This allows also the removal of some flags in zfcp since the kthread API handles thread creation and shutdown internally. To allow the usage of the kthread_stop function, replace the erp ready semaphore with a waitqueue for waiting until erp actions arrive on the ready queue. Reviewed-by:
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Swen Schillig authored
The fc_rport structure reserves a reference where a LLD can put information required in a situation where the fc transport class is triggering LLD callbacks. The zfcp driver was using this variable directly which is discouraged. This patch solves this issue by making this reference unnecessary. In addition the dev_loss_tmo callback is removed, it is not required: zfcp does not access the fc_rport after calling fc_remote_port_delete. Signed-off-by:
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Swen Schillig authored
Update the Fibre Channel related code to use the zfcp_fc prefix. Signed-off-by:
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Swen Schillig authored
Extract independent data structures and introduce common _setup and _destroy routines for QDIO and Fibre Channel related data structures Signed-off-by:
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Swen Schillig authored
Change the dbf data and functions to use the zfcp_dbf prefix throughout the code. Also change the calls to dbf to use zfcp_dbf instead of zfcp_adapter. Signed-off-by:
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Christof Schmitt authored
Don't let the erp wait for gid_pn requests to complete. Instead, queue the gid_pn work, exit erp and let the finished gid_pn work trigger a new port reopen. Reviewed-by:
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Swen Schillig authored
The zfcp_adapter structure was growing over time to a size of almost one memory page. To reduce the size of the data structure and to seperate different layers, put all qdio related data in the new zfcp_qdio data structure. Signed-off-by:
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Swen Schillig authored
Split all qdio related attributes out of zfcp_fsf_req and put it in new structure. Signed-off-by:
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Swen Schillig authored
Remove the global driver work queue and replace it with a workqueue local to the adapter. The usage of this workqueue makes this the correct place for the structure. In addition multiple adapters won't block each other due to the serialization of the queued work. Signed-off-by:
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Swen Schillig authored
The flag ZFCP_REQ_AUTO_CLEANUP was useless as the ZFCP_STATUS_FSFREQ_CLEANUP flag is there for exactly the same purpose. Signed-off-by:
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Swen Schillig authored
Remove the special case for NO_QTCB requests and optimize the mempool and cache processing for fsfreqs. Especially use seperate mempools for the zfcp_fsf_req and zfcp_qtcb structs. Signed-off-by:
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Swen Schillig authored
The combination wait_queue/wakeup in conjunction with the flag ZFCP_STATUS_FSFREQ_COMPLETED to signal the completion of an fsfreq was not race-safe and can be better solved by a completion. Signed-off-by:
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Swen Schillig authored
There is no need for the QDIO layer to have knowledge or do things wich are done better by the FSF layer and vice versa. Straighten a few things to improve vividness. Signed-off-by:
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Christof Schmitt authored
An adapter shutdown implicitly closes all open ports. Make sure to mark all WKA ports as offline, not only the directory server. Also make sure that no pending wka port work is running when the adapter is being removed. Reviewed-by:
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Christof Schmitt authored
When the FCP channel returns a series of commands with the error status "test link", zfcp will send a series of ELS ADISC commands. This is technically no problem, but it is enough to only issue one test command per remote port. So, track whether a ELS ADISC command is already pending, and do not send a new one if there is already a pending command. Reviewed-by:
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Christof Schmitt authored
Using a bitwise OR to not set anything at all is pointless so remove the useless statement. Reviewed-by:
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Christof Schmitt authored
The default trace level is to only trace failed FSF commands. Thus it is not necessary to collect trace data for most FSF commands, since it will be thrown away later. Restructure the FSF/HBA trace infrastructure to first check the trace level in a inline function and only do the expensive data collection for matching trace levels. Reviewed-by:
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Christof Schmitt authored
The default trace level is to only trace failed SCSI commands. Thus it is not necessary to collect trace data for most SCSI commands since it will be thrown away later. Restructure the SCSI trace infrastructure to first check the trace level in a inline function and only do the expensive data collection for matching trace levels. Reviewed-by:
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Christof Schmitt authored
The struct zfcp_adapter includes everything related to the debug traces. This introduces dependences between the definitions in zfcp_def.h and zfcp_dbf.h. Move all debug related data structures to a new data structure to break those dependencies and manage the debug data in zfcp_dbf.[hc]. Reviewed-by:
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Swen Schillig authored
In certain error scenarios ports, rports are getting attached, validated and removed from the systems environment. Depending on the layer this occurs asynchronously. This patch fixes the few races which existed and ensures all references and cross references are cleared at the time they're invalid. In addition fc transports actions are only scheduled when required. Signed-off-by:
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Yanqing_Liu@Dell.com authored
This patch is to add DM support for next generation of Dell PowerVault storage array. Signed-off-by:
Yanqing Liu <Yanqing_Liu@Dell.com> Acked-by:
Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by:
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- 22 Aug, 2009 12 commits
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James Bottomley authored
Novell is now funding SCSI work, so the MAINTAINERS file should reflect this. Signed-off-by: -
Kashyap, Desai authored
Bump version to 3.04.11 Signed-off-by: -
Kashyap, Desai authored
Code cleanup of host page alloc and diag reset. Signed-off-by: -
Kashyap, Desai authored
Do not set max_id value received from FW. Once SAS transport layer is introduced max_id value is missleading to SCSI mid layer. Use max_id to infinite value. logic of can queue of scsi host is changed. Signed-off-by: -
Kashyap, Desai authored
Change config request timeout value to 30 seconds. Signed-off-by: -
Kashyap, Desai authored
Handle insufficient resources status as similar to busy status. Signed-off-by: -
Kashyap, Desai authored
Removed mptscsih_timer_expired. This timer is no more use. Signed-off-by: -
Kashyap, Desai authored
Change DEFINED value of can queue for FC and SAS devices. Signed-off-by: -
Chandra Seetharaman authored
Reported-by:
Rice Brown <rick.brown@oit.gatech.edu> Signed-Off-by:
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James Bottomley authored
Universally, SCSI functions assume the lengths fed in are those of the buffer to DMA data to, not the lengths of the data minus the header. scsi_vpd_inquiry() assumed the latter and got it wrong, so fix up all the functions to use the correct assumption (and fix a bug where INQUIRY in SCSI-2 dcannot go over 255). [jejb: Matthew posted an identical version of this at the same time I did] Signed-off-by:
Matthew Wilcox <matthew@wil.cx> Signed-off-by:
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Michael Reed authored
An IBM tape drive failed to complete a PERSISTENT RESERVE IN within the scsi cmd timeout. Error recovery was initiated and it sequenced from abort through taking the tape drive offline. The device was taken offline because it repeatedly responded to the TUR command issued by error recovery with a RESERVATION CONFLICT status. The tape drive was reserved to another system. This is perfectly legitimate response to TUR, and is one that an escalation of recovery is unlikely to clear. Further, escalation of recovery can have undesirable side effects on the operation of tape drives shared with other initiators. Instead of escalating recovery, error recovery should treat the RESERVATION CONFLICT response to the TUR as a good status, giving the issuer of the command the opportunity to handle the timeout and reservation conflict. Signed-off-by:
Michael reed <mdr@sgi.com> Signed-off-by:
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Jiri Slaby authored
In nsp_cs_config there is a wrong struct nsp_cs_configdata allocation. It allocates only sizeof(pointer to nsp_cs_configdata) for a whole structure. Add a dereference to the sizeof to allocate sizeof(nsp_cs_configdata). Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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