linux.git/Documentation/scsi, branch v5.1

scsi: ufs-bsg: Allow reading descriptors

2019-02-27T14:00:02+00:00

Add this functionality, placing the descriptor being read in the actual
data buffer in the bio.

That is, for both read and write descriptors query upiu, we are using the
job's request_payload.  This in turn, is mapped back in user land to the
applicable sg_io_v4 xferp: dout_xferp for write descriptor, and din_xferp
for read descriptor.

Signed-off-by: Avri Altman 
Reviewed-by: Evan Green 
Reviewed-by: Bean Huo 
Signed-off-by: Martin K. Petersen

scsi: ufs-bsg: Change the calling convention for write descriptor

2019-02-27T13:56:32+00:00

When we had a write descriptor query upiu, we appended the descriptor right
after the bsg request.  This was fine as the bsg driver allows to allocate
whatever buffer we needed in its job request.

Still, the proper way to deliver payload, however small (we only write
config descriptors of 144 bytes), is by using the job request payload data
buffer.

So change this ABI now, while ufs-bsg is still new, and nobody is actually
using it.

Signed-off-by: Avri Altman 
Reviewed-by: Evan Green 
Reviewed-by: Bean Huo 
Signed-off-by: Martin K. Petersen

scsi: remove the SCSI OSD library

2019-02-06T02:28:52+00:00

Now that all the users are gone the SCSI OSD library can be removed as
well.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jens Axboe 
Signed-off-by: Martin K. Petersen

scsi: fs: remove exofs

2019-02-06T02:28:13+00:00

This was an example for using the SCSI OSD protocol, which we're trying
to remove.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jens Axboe 
Signed-off-by: Martin K. Petersen

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

2018-12-28T22:48:06+00:00

Pull SCSI updates from James Bottomley:
 "This is mostly update of the usual drivers: smarpqi, lpfc, qedi,
  megaraid_sas, libsas, zfcp, mpt3sas, hisi_sas.

  Additionally, we have a pile of annotation, unused variable and minor
  updates.

  The big API change is the updates for Christoph's DMA rework which
  include removing the DISABLE_CLUSTERING flag.

  And finally there are a couple of target tree updates"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (259 commits)
  scsi: isci: request: mark expected switch fall-through
  scsi: isci: remote_node_context: mark expected switch fall-throughs
  scsi: isci: remote_device: Mark expected switch fall-throughs
  scsi: isci: phy: Mark expected switch fall-through
  scsi: iscsi: Capture iscsi debug messages using tracepoints
  scsi: myrb: Mark expected switch fall-throughs
  scsi: megaraid: fix out-of-bound array accesses
  scsi: mpt3sas: mpt3sas_scsih: Mark expected switch fall-through
  scsi: fcoe: remove set but not used variable 'port'
  scsi: smartpqi: call pqi_free_interrupts() in pqi_shutdown()
  scsi: smartpqi: fix build warnings
  scsi: smartpqi: update driver version
  scsi: smartpqi: add ofa support
  scsi: smartpqi: increase fw status register read timeout
  scsi: smartpqi: bump driver version
  scsi: smartpqi: add smp_utils support
  scsi: smartpqi: correct lun reset issues
  scsi: smartpqi: correct volume status
  scsi: smartpqi: do not offline disks for transient did no connect conditions
  scsi: smartpqi: allow for larger raid maps
  ...

scsi: remove the use_clustering flag

2018-12-19T04:19:21+00:00

The same effects can be achieved by setting the dma_boundary to
PAGE_SIZE - 1 and the max_segment_size to PAGE_SIZE, so shift those
settings into the drivers.  Note that in many cases the setting might
be bogus, but this keeps the status quo.

[mkp: fix myrs and myrb]

Signed-off-by: Christoph Hellwig 
Signed-off-by: Martin K. Petersen

scsi: kill off the legacy IO path

2018-11-07T20:42:32+00:00

This removes the legacy (non-mq) IO path for SCSI.

Cc: linux-scsi@vger.kernel.org
Acked-by: Himanshu Madhani 
Reviewed-by: Hannes Reinecke 
Tested-by: Ming Lei 
Reviewed-by: Omar Sandoval 
Acked-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

2018-10-25T14:40:30+00:00

Pull SCSI updates from James Bottomley:
 "This is mostly updates of the usual drivers: UFS, esp_scsi, NCR5380,
  qla2xxx, lpfc, libsas, hisi_sas.

  In addition there's a set of mostly small updates to the target
  subsystem a set of conversions to the generic DMA API, which do have
  some potential for issues in the older drivers but we'll handle those
  as case by case fixes.

  A new myrs driver for the DAC960/mylex raid controllers to replace the
  block based DAC960 which is also being removed by Jens in this merge
  window.

  Plus the usual slew of trivial changes"

[ "myrs" stands for "MYlex Raid Scsi". Obviously. Silly of me to even
  wonder. There's also a "myrb" driver, where the 'b' stands for
  'block'. Truly, somebody has got mad naming skillz. - Linus ]

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (237 commits)
  scsi: myrs: Fix the processor absent message in processor_show()
  scsi: myrs: Fix a logical vs bitwise bug
  scsi: hisi_sas: Fix NULL pointer dereference
  scsi: myrs: fix build failure on 32 bit
  scsi: fnic: replace gross legacy tag hack with blk-mq hack
  scsi: mesh: switch to generic DMA API
  scsi: ips: switch to generic DMA API
  scsi: smartpqi: fully convert to the generic DMA API
  scsi: vmw_pscsi: switch to generic DMA API
  scsi: snic: switch to generic DMA API
  scsi: qla4xxx: fully convert to the generic DMA API
  scsi: qla2xxx: fully convert to the generic DMA API
  scsi: qla1280: switch to generic DMA API
  scsi: qedi: fully convert to the generic DMA API
  scsi: qedf: fully convert to the generic DMA API
  scsi: pm8001: switch to generic DMA API
  scsi: nsp32: switch to generic DMA API
  scsi: mvsas: fully convert to the generic DMA API
  scsi: mvumi: switch to generic DMA API
  scsi: mpt3sas: switch to generic DMA API
  ...

Merge tag 'docs-4.20' of git://git.lwn.net/linux

2018-10-24T17:01:11+00:00

Pull documentation updates from Jonathan Corbet:
 "This is a fairly typical cycle for documentation. There's some welcome
  readability improvements for the formatted output, some LICENSES
  updates including the addition of the ISC license, the removal of the
  unloved and unmaintained 00-INDEX files, the deprecated APIs document
  from Kees, more MM docs from Mike Rapoport, and the usual pile of typo
  fixes and corrections"

* tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits)
  docs: Fix typos in histogram.rst
  docs: Introduce deprecated APIs list
  kernel-doc: fix declaration type determination
  doc: fix a typo in adding-syscalls.rst
  docs/admin-guide: memory-hotplug: remove table of contents
  doc: printk-formats: Remove bogus kobject references for device nodes
  Documentation: preempt-locking: Use better example
  dm flakey: Document "error_writes" feature
  docs/completion.txt: Fix a couple of punctuation nits
  LICENSES: Add ISC license text
  LICENSES: Add note to CDDL-1.0 license that it should not be used
  docs/core-api: memory-hotplug: add some details about locking internals
  docs/core-api: rename memory-hotplug-notifier to memory-hotplug
  docs: improve readability for people with poorer eyesight
  yama: clarify ptrace_scope=2 in Yama documentation
  docs/vm: split memory hotplug notifier description to Documentation/core-api
  docs: move memory hotplug description into admin-guide/mm
  doc: Fix acronym "FEKEK" in ecryptfs
  docs: fix some broken documentation references
  iommu: Fix passthrough option documentation
  ...

scsi: ufs: Add a bsg endpoint that supports UPIUs

2018-10-11T03:09:46+00:00

For now, just provide an API to allocate and remove ufs-bsg node. We
will use this framework to manage ufs devices by sending UPIU
transactions.

For the time being, implements an empty bsg_request() - will add some
more functionality in coming patches.

Nonetheless, we reveal here the protocol we are planning to use: UFS
Transport Protocol Transactions. UFS transactions consist of packets
called UFS Protocol Information Units (UPIU).

There are UPIU’s defined for UFS SCSI commands, responses, data in and
data out, task management, utility functions, vendor functions,
transaction synchronization and control, and more.

By using UPIUs, we get access to the most fine-grained internals of this
protocol, and able to communicate with the device in ways, that are
sometimes beyond the capacity of the ufs driver.

Moreover and as a result, our core structure - ufs_bsg_node has a pretty
lean structure: using upiu transactions that contains the outmost
detailed info, so we don't really need complex constructs to support it.

Signed-off-by: Avri Altman 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Bart Van Assche 
Signed-off-by: Martin K. Petersen