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path: root/drivers/scsi/mpt3sas/mpt3sas_transport.c
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2020-11-04scsi: mpt3sas: Add module parameter multipath_on_hbaSreekanth Reddy
Add module parameter multipath_on_hba to enable/disable multi-port path topology support. By default this feature is enabled on SAS3.5 HBA device and disabled on SAS3 &SAS2.5 HBA devices. When this feature is disabled then driver uses a default PhysicalPort(PortID) number i.e. 255 instead of the PhysicalPort number provided by HBA firmware. Link: https://lore.kernel.org/r/20201027130847.9962-14-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Add bypass_dirty_port_flag parameterSreekanth Reddy
Added a new parameter bypass_dirty_port_flag in function mpt3sas_get_port_by_id(). When this parameter is set to one then search for matching hba port entry from port_table_list even when this hba_port entry is marked as dirty. Link: https://lore.kernel.org/r/20201027130847.9962-12-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Handling HBA vSES deviceSreekanth Reddy
Each direct attached device will have a unique Port ID, but with an exception. HBA vSES may use the same Port ID of another direct attached device Port's ID. As a result, special handling is needed for vSES. Create a virtual_phy object when a new HBA vSES device is detected and add this virtual_phy object to vphys_list of port ID's hba_port object. When the HBA vSES device is removed then remove the corresponding virtual_phy object from its parent's hba_port's vphy_list and free this virtual_vphy object. In hba_port object add vphy_mask field to hold the list of HBA phy bits which are assigned to vSES devices. Also add vphy_list list to hold list of virtual_phy objects which holds the same portID of current hba_port's portID. Also, add a hba_vphy field in _sas_phy object to determine whether this _sas_phy object belongs to vSES device or not. - Allocate a virtual_phy object whenever a virtual phy is detected while processing the SASIOUnitPage0's phy data. And this allocated virtual_phy object to corresponding PortID's hba_port's vphy_list. - When a vSES device is added to the SML then initialize the corresponding virtual_phy objects's sas_address field with vSES device's SAS Address. - Free this virtual_phy object during driver unload time and when this vSES device is removed. Link: https://lore.kernel.org/r/20201027130847.9962-11-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Set valid PhysicalPort in SMPPassThroughSreekanth Reddy
The driver currently sets PhysicalPort field to 0xFF for SMPPassthrough Request message. In zoning topologies this SMPPassthrough command always operates on devices in one zone (default zone) even when user issues SMP command for other zone drives. Define _transport_get_port_id_by_rphy() and _transport_get_port_id_by_sas_phy() helper functions to get Physical Port number from sas_rphy & sas_phy respectively for SMPPassthrough request message so that SMP Passthrough request message is sent to intended zone device. Link: https://lore.kernel.org/r/20201027130847.9962-10-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Get sas_device objects using device's rphySreekanth Reddy
In the following scsi_host_template and sas_function_template callback functions the driver does not have PhysicalPort number information to retrieve the sas_device object using SAS Address & PhysicalPort number. In these callback functions the device's rphy object is used to retrieve sas_device object for the device. .target_alloc, .get_enclosure_identifier .get_bay_identifier When a rphy (of type sas_rphy) object is allocated then its address is saved in corresponding sas_device object's rphy field. In __mpt3sas_get_sdev_by_rphy(), the driver loops over all the sas_device objects from sas_device_list list to retrieve the sas_device objects whose rphy matches the provided rphy. Link: https://lore.kernel.org/r/20201027130847.9962-8-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Rename transport_del_phy_from_an_existing_port()Sreekanth Reddy
Renamed _transport_add_phy_to_an_existing_port() to mpt3sas_transport_add_phy_to_an_existing_port() and _transport_del_phy_from_an_existing_port() to mpt3sas_transport_del_phy_from_an_existing_port() as the driver needs to call these functions from outside mpt3sas_transport.c file. Added extra function argument 'port' of type struct hba_port to above functions and check for portID before adding/removing the phy from the _sas_port object. I.e. add/remove the phy from _sas_port object only if _sas_port's port object and phy's port object are the same. Link: https://lore.kernel.org/r/20201027130847.9962-7-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Get device objects using sas_address & portIDSreekanth Reddy
Currently driver retrieves the sas_device/sas_expander objects from corresponding object's lists using just device's SAS Address. Make driver retrieve the objects from the corresponding objects list using device's SAS Address and PhysicalPort (or PortID) number. PhysicalPort number is the port number of the HBA through which this device is accessed. Link: https://lore.kernel.org/r/20201027130847.9962-6-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-04scsi: mpt3sas: Update hba_port's sas_address & phy_maskSreekanth Reddy
Update hba_port's sas_address & phy_mask fields whenever a direct expander or sas/sata target devices are added or removed. When any direct attached device is discovered then driver: - Gets the hba_port object corresponding to device's PhysicalPort number; - Updates the hba_port's sas_address field with device's SAS Address; - Updates the hba_port's phy_mask filed with device's narrow/wide port Phy number bits; - If a sas/sata end device (not only direct-attached devices) is added then corresponding sas_device object's port variable is assigned with hba_port object's address whose port_id matches the device's PhysicalPort number. - If an expander device is added then corresponding sas_expander object's port variable is assigned with hba_port object's address whose port_id matches the expander device's PhysicalPort number. When any direct attached device is detached then driver will delete the hba_port object corresponding to device's PhysicalPort number. Whenever any HBA phy's link (of direct attached device's port) comes up then update the phy_mask field of corresponding hba_port object. Link: https://lore.kernel.org/r/20201027130847.9962-5-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-02scsi: mpt3sas: Optimize mpt3sas driver loggingSreekanth Reddy
This improves mpt3sas driver default debug information collection and allows for a higher percentage of issues being able to be resolved with a first-time data capture. However, this improvement to balance the amount of debug data captured with the performance of driver. Enabled below print messages with out affecting the IO performance, 1. When task abort TM is received then print IO commands's timeout value and how much time this command has been outstanding. 2. Whenever hard reset occurs then print from where this hard reset has been issued. 3. Failure message should be displayed for failure scenarios without any logging level. 4. Added a print after driver successfully register or unregistered a target drive with the SML. This print will be useful for debugging the issue where the drive addition or deletion is hanging at SML. 5. During driver load time print request, reply, sense and config page pool's information such as its address, length and size. Also printed sg_tablesize information. Link: https://lore.kernel.org/r/20191226111333.26131-8-sreekanth.reddy@broadcom.com Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-06-18scsi: mpt3sas: function pointers of request descriptorSuganath Prabu S
This code refactoring introduces function pointers. Host uses Request Descriptors of different types for posting an entry onto a request queue. Based on controller type and capabilities, host can also use atomic descriptors other than normal descriptors. Using function pointer will avoid if-else statements Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-11-06scsi: mpt3sas: Call sas_remove_host before removing the target devicesSuganath Prabu
Call sas_remove_host() before removing the target devices in the driver's .remove() callback function(i.e. during driver unload time). So that driver can provide a way to allow SYNC CACHE, START STOP unit commands etc. (which are issued from SML) to the target drives during driver unload time. Once sas_remove_host() is called before removing the target drives then driver can just clean up the resources allocated for target devices and no need to call sas_port_delete_phy(), sas_port_delete() API's as these API's internally called from sas_remove_host(). Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Reviewed-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-11-06scsi: mpt3sas: Separate out mpt3sas_wait_for_iocSuganath Prabu
No functional changes. This section of code "wait for IOC to be operational" is used in many places across the driver. Factor this code out into a new mpt3sas_wait_for_ioc(). Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Reviewed-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-11-06scsi: mpt3sas: Added new #define variable IOC_OPERATIONAL_WAIT_COUNTSuganath Prabu
Added new #define variable IOC_OPERATIONAL_WAIT_COUNT and it replaces hard coded value '10' in all the places where driver is waiting for the IOC to become operational. Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Reviewed-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-10-17scsi: mpt3sas: switch to generic DMA APIChristoph Hellwig
Switch from the legacy PCI DMA API to the generic DMA API. Also simplify setting the DMA mask a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-10-10scsi: mpt3sas: Convert logging uses with MPT3SAS_FMT without logging levelsJoe Perches
Convert these uses to ioc_<level> where appropriate. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-10-10scsi: mpt3sas: Convert mlsleading uses of pr_<level> with MPT3SAS_FMTJoe Perches
These have misordered uses of __func__ and ioc->name that could mismatch MPT3SAS_FMT and "%s: ". Convert them to ioc_<level>. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-10-10scsi: mpt3sas: Convert uses of pr_<level> with MPT3SAS_FMT to ioc_<level>Joe Perches
Use a more common logging style. Done using the perl script below and some typing $ git grep --name-only -w MPT3SAS_FMT -- "*.c" | \ xargs perl -i -e 'local $/; while (<>) { s/\bpr_(info|err|notice|warn)\s*\(\s*MPT3SAS_FMT\s*("[^"]+"(?:\s*\\?\s*"[^"]+"\s*){0,5}\s*),\s*ioc->name\s*/ioc_\1(ioc, \2/g; print;}' Miscellanea for these conversions: o Coalesce formats o Realign arguments o Remove unnecessary parentheses o Use casts to u64 instead of unsigned long long where appropriate o Convert broken pr_info uses to pr_cont o Fix broken format string concatenation with line continuations and excess whitespace Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-06-19scsi: mpt3sas: Improve kernel-doc headersBart Van Assche
Avoids that warnings about the kernel headers appear when building with W=1. Remove useless "@Returns - Nothing" clauses. Change "@Return - " into "Return: ". Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Sathya Prakash <sathya.prakash@broadcom.com> Cc: Chaitra P B <chaitra.basappa@broadcom.com> Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-06-19scsi: mpt3sas: Fix _transport_smp_handler() error pathBart Van Assche
This patch avoids that smatch complains about a double unlock on ioc->transport_cmds.mutex. Fixes: 651a01364994 ("scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough") Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Sathya Prakash <sathya.prakash@broadcom.com> Cc: Chaitra P B <chaitra.basappa@broadcom.com> Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com> Cc: stable@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-06-19scsi: mpt3sas: Fix indentationBart Van Assche
Modify the indentation such that smatch no longer complains about inconsistent indenting. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Sathya Prakash <sathya.prakash@broadcom.com> Cc: Chaitra P B <chaitra.basappa@broadcom.com> Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-02-27scsi: mpt3sas: Do not use 32-bit atomic request descriptor for Ventura ↵Suganath Prabu S
controllers. Sending I/O through 32 bit descriptors to Ventura series of controller results in IO timeout on certain conditions. This error only occurs on systems with high I/O activity. Changes in this patch will prevent driver from using 32 bit descriptor and use 64 bit Descriptors Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-08-29scsi: scsi_transport_sas: switch to bsg-lib for SMP passthroughChristoph Hellwig
Simplify the SMP passthrough code by switching it to the generic bsg-lib helpers that abstract away the details of the request code, and gets drivers out of seeing struct scsi_request. For the libsas host SMP code there is a small behavior difference in that we now always clear the residual len for successful commands, similar to the three other SMP handler implementations. Given that there is no partial command handling in the host SMP handler this should not matter in practice. [mkp: typos and checkpatch fixes] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-27block: split scsi_request out of struct requestChristoph Hellwig
And require all drivers that want to support BLOCK_PC to allocate it as the first thing of their private data. To support this the legacy IDE and BSG code is switched to set cmd_size on their queues to let the block layer allocate the additional space. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-11-08scsi: mpt3sas: Use the new MPI 2.6 32-bit Atomic Request Descriptors for ↵Suganath Prabu Subramani
SAS35 devices. Support Atomic Request Descriptors for Ventura/SAS35 devices. Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com> Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com> Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-08mpt3sas: Fix warnings exposed by W=1Calvin Owens
Trivial non-functional changes for a couple annoying things: 1) Functions local to files are not declared static, which is frustrating when reading the code because it's non-obvious at first glance what's actually called from other files. 2) Set-but-unused variables abound, presumably to mask -Wunused-result errors in the past. None of these are flagged today though (with one exception noted below), so remove them. Fixing (2) exposed the fact that we improperly ignore the return value of scsi_device_reprobe() in _scsih_reprobe_lun(). Fixing the calling code to deal with the potential error is non-trivial, so for now just WARN(). Signed-off-by: Calvin Owens <calvinowens@fb.com> Acked-by: Chaitra P B <chaitra.basappa@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-08mpt3sas: Eliminate dead sleep_flag codeCalvin Owens
With the exception of a single call to wait_for_doorbell_int(), all this conditional sleeping code is dead. So delete it. Signed-off-by: Calvin Owens <calvinowens@fb.com> Acked-by: Chaitra P B <chaitra.basappa@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-12mpt3sas: avoid mpt3sas_transport_port_add NULL parent_devJoe Lawrence
If _scsih_sas_host_add's call to mpt3sas_config_get_sas_iounit_pg0 fails, ioc->sas_hba.parent_dev may be left uninitialized. A later device probe could invoke mpt3sas_transport_port_add which will call sas_port_alloc_num [scsi_transport_sas] with a NULL parent_dev pointer. Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com> Acked-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23mpt3sas: Fix static analyzer(coverity) tool identified defectsSuganath prabu Subramani
1.Wrong size of argument is being passed The size of struct being passed as an argument to memset func and area of memory being pointed by an instance of struct in memset func should be of same structure type. 2.Dereference null return value 3.Array compared against '0' Check whether value pointed by particular index of an array is null or not in "if" statement. Signed-off-by: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com> Signed-off-by: Chaitra P B <chaitra.basappa@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23mpt3sas: Used IEEE SGL instead of MPI SGL while framing a SMP Passthrough ↵Suganath prabu Subramani
request message. As driver was using MPI SGL while framing the SMP Passthrough request message due to which firmware unable to post the Reply Data in the host memory and timeout is observed for this SMP Passthrough request message and so unable to perform phy disable operation. Signed-off-by: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com> Signed-off-by: Chaitra P B <chaitra.basappa@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2015-11-11mpt3sas: Refcount sas_device objects and fix unsafe list usageSreekanth Reddy
sas_device objects can be referenced concurrently throughout the driver. We need a way to make sure threads can't delete them out from under each other. This patch adds the refcount and refactors the code to use it. Additionally, we cannot iterate over the sas_device_list without holding the lock or we risk corrupting random memory if items are added or deleted as we iterate. This patch refactors _scsih_probe_sas() to use the sas_device_list in a safe way. This patch is ported from the following mpt2sas driver commit d224fe0d6097 ("mpt2sas: Refcount sas_device objects and fix unsafe list usage"). Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Acked-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2015-08-27mpt3sas: Call dma_mapping_error() API after mapping an address with ↵Sreekanth Reddy
dma_map_single() API Added dma_mapping_error() API after mapping an address with dma_map_single() API. Otherwise when CONFIG_DMA_API_DEBUG is enabled in the kernel, then it complains about mpt3sas driver not calling dma_mapping_error after mapping an address with dma_map_single Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-08-27mpt3sas: Don't block the drive when drive addition under the control of SMLSreekanth Reddy
During hot-plugging of a disk(having a flaky link), the disk addition stops and any further disk addition or removal doesn't happen on that controller. This is because, when driver receives DELAY_NOT_RESPONDING event for a disk while it is undergoing addition at the SCSI Transport layer, the driver would block the I/O to that disk resulting in a deadlock. i.e the disk addition work couldn't be completed at the SCSI Transport Layer as it can't send any I/Os (such as Inquiry, Report LUNs etc) to the disk as I/Os are blocked to this drive. Also any subsequent device removal (TARGET_NOT_RESPONDING) or link update(RC_PHY_CHANGED) event couldn't be processed as they are in the queue to get processed after disk addition event. Description of Change: Don't block the drive when drive addition is under the control of SML. So that SML won't be blocked of issuing the device dicovery commands (such as Inquiry, Report LUNs etc). Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-01-13mpt2sas, mpt3sas: Update attribution language to AvagoSreekanth Reddy
Copyright, Trademark & Confidentiality legal statements throughout the source code changed from LSI to Avago. Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-12-04Revert "[SCSI] mpt3sas: Remove phys on topology change"Sreekanth Reddy
This reverts commit 963ba22b90a955363644cd397b20226928eab976 ("mpt3sas: Remove phys on topology change") Reverting the previous mpt3sas drives patch changes, since we will observe below issue Issue: Drives connected Enclosure/Expander will unregister with SCSI Transport Layer, if any one remove and add expander cable with in DMD (Device Missing Delay) time period or even any one power-off and power-on the Enclosure with in the DMD period. Cc: <stable@vger.kernel.org> Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-09-16mpt3sas: Copyright in driver sources is updated for year the 2014.Sreekanth Reddy
Copyright in driver sources is updated for year the 2014. Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2013-11-23block: Kill bio_segments()/bi_vcnt usageKent Overstreet
When we start sharing biovecs, keeping bi_vcnt accurate for splits is going to be error prone - and unnecessary, if we refactor some code. So bio_segments() has to go - but most of the existing users just needed to know if the bio had multiple segments, which is easier - add a bio_multiple_segments() for them. (Two of the current uses of bio_segments() are going to go away in a couple patches, but the current implementation of bio_segments() is unsafe as soon as we start doing driver conversions for immutable biovecs - so implement a dumb version for bisectability, it'll go away in a couple patches) Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Neil Brown <neilb@suse.de> Cc: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com> Cc: Sreekanth Reddy <Sreekanth.Reddy@lsi.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
2013-11-23block: Convert bio_for_each_segment() to bvec_iterKent Overstreet
More prep work for immutable biovecs - with immutable bvecs drivers won't be able to use the biovec directly, they'll need to use helpers that take into account bio->bi_iter.bi_bvec_done. This updates callers for the new usage without changing the implementation yet. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Ed L. Cashin" <ecashin@coraid.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Paul Clements <Paul.Clements@steeleye.com> Cc: Jim Paris <jim@jtan.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Yehuda Sadeh <yehuda@inktank.com> Cc: Sage Weil <sage@inktank.com> Cc: Alex Elder <elder@inktank.com> Cc: ceph-devel@vger.kernel.org Cc: Joshua Morris <josh.h.morris@us.ibm.com> Cc: Philip Kelleher <pjk1939@linux.vnet.ibm.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Neil Brown <neilb@suse.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com> Cc: Sreekanth Reddy <Sreekanth.Reddy@lsi.com> Cc: support@lsi.com Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Cc: Tejun Heo <tj@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Guo Chao <yan@linux.vnet.ibm.com> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Keith Busch <keith.busch@intel.com> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: Quoc-Son Anh <quoc-sonx.anh@intel.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Seth Jennings <sjenning@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: "Darrick J. Wong" <darrick.wong@oracle.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jan Kara <jack@suse.cz> Cc: linux-m68k@lists.linux-m68k.org Cc: linuxppc-dev@lists.ozlabs.org Cc: drbd-user@lists.linbit.com Cc: nbd-general@lists.sourceforge.net Cc: cbe-oss-dev@lists.ozlabs.org Cc: xen-devel@lists.xensource.com Cc: virtualization@lists.linux-foundation.org Cc: linux-raid@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: DL-MPTFusionLinux@lsi.com Cc: linux-scsi@vger.kernel.org Cc: devel@driverdev.osuosl.org Cc: linux-fsdevel@vger.kernel.org Cc: cluster-devel@redhat.com Cc: linux-mm@kvack.org Acked-by: Geoff Levand <geoff@infradead.org>
2013-09-03[SCSI] mpt3sas: Remove phys on topology changeJan Vesely
Signed-off-by: Jan Vesely <jvesely@redhat.com> Acked-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-07-09[SCSI] mpt3sas: 2013 source code copyrightSreekanth Reddy
The Copyright String in all mpt3sas files are changed to 2012-2013. Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-12-01[SCSI] mpt3sas: add new driver supporting 12GB SASSreekanth Reddy
These driver files are initially, substantially similar to mpt2sas but, because mpt2sas is going into maintenance mode and mp3sas will become heavily developed, we elected to keep the code bases separate. Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com> Reviewed-by: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>