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Unlike the legacy I/O path, scsi-mq preallocates a large array to hold
the scatterlist for each request. This static allocation can consume
substantial amounts of memory on modern controllers which support a
large number of concurrently outstanding requests.
To facilitate a switch to a smaller static allocation combined with a
dynamic allocation for requests that need it, we need to make sure all
SCSI drivers handle chained scatterlists correctly.
Convert remaining drivers that directly dereference the scatterlist
array to using the iterator functions.
[mkp: clarified commit message]
Cc: devel@driverdev.osuosl.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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There are a few remaining drivers/staging/*/Makefile files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There are a few remaining drivers/staging/*/Kconfig files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Replace '--help--' in Kconfig and indent the subsequent text to silence
checkpatch.pl
warning:
WARNING: prefer 'help' over '---help---' for new help texts
Signed-off-by: Wentao Cai <etsai042@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently, the Kbuild core manipulates header search paths in a crazy
way [1].
To fix this mess, I want all Makefiles to add explicit $(srctree)/ to
the search paths in the srctree. Some Makefiles are already written in
that way, but not all. The goal of this work is to make the notation
consistent, and finally get rid of the gross hacks.
Having whitespaces after -I does not matter since commit 48f6e3cf5bc6
("kbuild: do not drop -I without parameter").
[1]: https://patchwork.kernel.org/patch/9632347/
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull staging/IIO driver updates from Greg KH:
"Here is the big staging and iio driver pull request for 4.21-rc1.
Lots and lots of tiny patches here, nothing major at all. Which is
good, tiny cleanups is nice to see. No new huge driver removal or
addition, this release cycle, although there are lots of good IIO
driver changes, addtions, and movement from staging into the "real"
part of the kernel, which is always great.
Full details are in the shortlog, and all of these have been in
linux-next for a while with no reported issues"
* tag 'staging-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (553 commits)
staging: mt7621-mmc: Correct spelling mistakes in comments
staging: wilc1000: fix missing read_write setting when reading data
mt7621-mmc: char * array declaration might be better as static const
mt7621-mmc: return statement in void function unnecessary
mt7621-mmc: Alignment should match open parenthesis
mt7621-mmc: Removed unnecessary blank lines
mt7621-mmc: Fix some coding style issues
staging: android: ashmem: doc: Fix spelling
staging: rtl8188eu: cleanup brace coding style issues
staging: rtl8188eu: add spaces around '&' in rtw_mlme_ext.c
staging: rtl8188eu: change return type of is_basicrate() to bool
staging: rtl8188eu: simplify null array initializations
staging: rtl8188eu: change order of declarations to improve readability
staging: rtl8188eu: make some arrays static in rtw_mlme_ext.c
staging: rtl8188eu: constify some arrays
staging: rtl8188eu: convert unsigned char arrays to u8
staging: rtl8188eu: remove redundant declaration in rtw_mlme_ext.c
staging: rtl8188eu: remove unused arrays WFD_OUI and WMM_INFO_OUI
staging: rtl8188eu: remove unnecessary parentheses in rtw_mlme_ext.c
staging: rtl8188eu: remove unnecessary comments in rtw_mlme_ext.c
...
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Most SCSI drivers want to enable "clustering", that is merging of
segments so that they might span more than a single page. Remove the
ENABLE_CLUSTERING define, and require drivers to explicitly set
DISABLE_CLUSTERING to disable this feature.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
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Move the visorbus driver out of staging (drivers/staging/unisys/visorbus)
and to drivers/visorbus. Modify the configuration and makefiles so they
now reference the new location. The s-Par header file visorbus.h that is
referenced by all s-Par drivers, is being moved into include/linux.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Now that the SPDX tag is in all unisys driver files, that identifies the
license in a specific and legally-defined manner. So the extra GPL text
wording can be removed as it is no longer needed at all.
This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text. And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.
No copyright headers or other non-license-description text was removed.
Cc: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.
Update the drivers/staging/unisys files files with the correct SPDX
license identifier based on the license text in the file itself. The
SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.
This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.
Cc: David Kershner <david.kershner@unisys.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Clean up unneeded parenthesis reported by checkpatch.pl.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Validate that the channel contents match the channel type that we are
matching.
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The header file visorbus.h included several linux headers that were
used by the source files that include it. Move the includes to the
files that actually use them.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull SCSI updates from James Bottomley:
"This is mostly updates of the usual suspects: lpfc, qla2xxx, hisi_sas,
megaraid_sas, zfcp and a host of minor updates.
The major driver change here is the elimination of the block based
cciss driver in favour of the SCSI based hpsa driver (which now drives
all the legacy cases cciss used to be required for). Plus a reset
handler clean up and the redo of the SAS SMP handler to use bsg lib"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (279 commits)
scsi: scsi-mq: Always unprepare before requeuing a request
scsi: Show .retries and .jiffies_at_alloc in debugfs
scsi: Improve requeuing behavior
scsi: Call scsi_initialize_rq() for filesystem requests
scsi: qla2xxx: Reset the logo flag, after target re-login.
scsi: qla2xxx: Fix slow mem alloc behind lock
scsi: qla2xxx: Clear fc4f_nvme flag
scsi: qla2xxx: add missing includes for qla_isr
scsi: qla2xxx: Fix an integer overflow in sysfs code
scsi: aacraid: report -ENOMEM to upper layer from aac_convert_sgraw2()
scsi: aacraid: get rid of one level of indentation
scsi: aacraid: fix indentation errors
scsi: storvsc: fix memory leak on ring buffer busy
scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough
scsi: smartpqi: remove the smp_handler stub
scsi: hpsa: remove the smp_handler stub
scsi: bsg-lib: pass the release callback through bsg_setup_queue
scsi: Rework handling of scsi_device.vpd_pg8[03]
scsi: Rework the code for caching Vital Product Data (VPD)
scsi: rcu: Introduce rcu_swap_protected()
...
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There's no need to keep the private data for a device in a separate
list; better to store it in ->hostdata and do away with the additional
list.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The first line of the top file comment should begin on the line following
the block comment opening, thereby following the convention used elsewhere
in the driver set.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The iochannel.h header file references ETH_HLEN which is defined in
skbuff. Removed it from visorhba since it was no longer needed.
Reviewed-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Replace use of standard Linux dma_data_direction with a Unisys-
specific uis_dma_data_direction and provide a function to convert
from the latter to the former. This is necessary because Unisys
s-Par depends on the exact format of this field in multiple OSs
and languages, and so using the standard version creates an
unnecessary dependency between the kernel and s-Par.
Signed-off-by: Steven Matthews <steven.matthews@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There are new types and helpers that are supposed to be used in new code.
As a preparation to get rid of legacy types and API functions do
the conversion here.
While here, re-indent couple of lines to increase readability.
Cc: David Kershner <david.kershner@unisys.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: sparmaintainer@unisys.com
Cc: devel@driverdev.osuosl.org
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fixed incorrect function definition style in visorhba/visorhba_main.c
by placing the function names on the same line as the return.
Signed-off-by: Charles Daniels <cdaniels@fastmail.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: David Binder <david.binder@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Removes unnecessary checks for a NULL pointer in a non-API function.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: David Binder <david.binder@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Removes unnecessary blank lines to create a more uniform coding style.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: David Binder <david.binder@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Refactors existing static function comments to increase code readability.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Removed comments from the right side of the lines.
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fixed style of permissions to octal.
Found using checkpatch
Signed-off-by: Derek Robson <robsonde@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Renamed structure spar_io_channel_protocol to visor_io_channel and
changed "visor bus" to "visorbus" in a comment in visornic_main.c
and visorhba_main.c.
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Renamed #defines
* ULTRA_CHANNEL_PROTOCOL_SIGNATURE to
VISOR_CHANNEL_SIGNATURE
* SPAR_CHANNEL_SERVER_READY to
VISOR_CHANNEL_SERVER_READY
* ULTRA_VALID_CHANNELCLI_TRANSITION
VISOR_VALID_CHANNELCLI_TRANSITION
* ULTRA_CLIERRORBOOT_THROTTLEMSG_DISABLED to
VISOR_CLIERRORBOOT_THROTTLEMSG_DISABLED
* ULTRA_CLIERRORBOOT_THROTTLEMSG_NOTATTACHED to
VISOR_CLIERRORBOOT_THROTTLEMSG_NOTATTACHED
* ULTRA_CLIERRORBOOT_THROTTLEMSG_BUSY to
VISOR_CLIERRORBOOT_THROTTLEMSG_BUSY
* ULTRA_IO_DRIVER_ENABLES_INTS to
VISOR_DRIVER_ENABLES_INTS
* ULTRA_IO_CHANNEL_IS_POLLING to
VISOR_CHANNEL_IS_POLLING
* ULTRA_IO_IOVM_IS_OK_WITH_DRIVER_DISABLING_INTS to
VISOR_IOVM_OK_DRIVER_DISABLING_INTS
* ULTRA_IO_DRIVER_DISABLES_INTS to
VISOR_DRIVER_DISABLES_INTS
* ULTRA_IO_DRIVER_SUPPORTS_ENHANCED_RCVBUF_CHECKING to
VISOR_DRIVER_ENHANCED_RCVBUF_CHECKING
* ULTRA_CHANNEL_ENABLE_INTS to
VISOR_CHANNEL_ENABLE_INTS
* SPAR_VHBA_CHANNEL_PROTOCOL_UUID to VISOR_VHBA_CHANNEL_UUID
* SPAR_VHBA_CHANNEL_PROTOCOL_UUID_STR to
VISOR_VHBA_CHANNEL_UUID_STR
* SPAR_VNIC_CHANNEL_PROTOCOL_UUID to VISOR_VNIC_CHANNEL_UUID
* SPAR_VNIC_CHANNEL_PROTOCOL_UUID_STR to
VISOR_VNIC_CHANNEL_UUID_STR
* SPAR_SIOVM_UUID to VISOR_SIOVM_UUID
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The following commit fixes the following sparse report:
drivers/staging//unisys/visorhba/visorhba_main.c:660:29: warning: cast to restricted __le64
by casting readq (which is unsigned long on x86) to u64, as expected by the seq_printf call.
Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Acked-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The root issue is that we are not allowed to have items on the
stack being passed to "DMA" like operations. In this case we have
a vmcall and an inline completion of scsi command.
This patch fixes the issue by moving the variables on stack in
do_scsi_nolinuxstat() to heap memory.
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In an effort to create a more uniform coding style within the Unisys
s-Par driver set, this patch adjusts the formatting of all #define
directives within this source file to match the following template,
and thereby eliminate irregular usage of whitespace:
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
The amount of whitespace used between the <token> and the <value> is
dependent on what is needed to make the surrounding #define directives
as uniform as possible.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Removed inline keyword from the function complete_taskmgmt_command
in visorhba_main.c
Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Removes kernel-doc formatting for comments that precede static functions.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fixes miscellaneous comment issues in visorhba_main.c.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Remove the MAX_BUF define and associated comments.
Signed-off-by: Bryan Thompson <bryan.thompson@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: David Binder <david.binder@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Per Documentation/CodingStyle, function names that convey an action or an
imperative command should return an integer. This commit converts the
visorbus API function, visorchannel_signalinsert(), to returning integer
values. All uses of this function are updated accordingly.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Per Documentation/CodingStyle, function names that convey an action or an
imperative command should return an integer. This commit converts the
visorbus API function, visorchannel_signalremove(), to returning integer
values. All uses of this function are updated accordingly.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch ensures that consistent verbiage is used in the
MODULE_DESCRIPTION text (reported by 'modinfo') for all of
the Unisys s-Par drivers.
Signed-off-by: Jon Frisch <jon.frisch@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Remove not needed prototypes in visorhba.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch changes the vague -1 return value to -EBUSY
Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch fixes a few checkpatch warnings in visorhba:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Returns 0 instead of variable rc in visorhba_init().
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The prior patch which simplified the visorhba debugfs interface made it so
visorhbas_open[] and VISORHBA_OPEN_MAX were no longer needed, so they have
now been deleted.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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debugfs info for each visorhba device is now presented by a file named of
the following form within the debugfs tree:
visorhba/vbus<x>:dev<y>/info
where <x> is the vbus number, and <y> is the relative device number.
Also, the debugfs presentation function was converted to use the seq_file
interface, so that it could access the device context without resorting to
a global array. This also simplified the function.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The handling of CMD_NOTIFYGUEST_TYPE messages from the IO partition appears
to be only partially implemented, but fortunately it is never used in our
current environment. This patch deletes the unused code.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch is necessary to enable ANY task mgmt command to complete
successfully via visorhba.
When issuing a task mgmt command (CMD_SCSITASKMGMT_TYPE) to the IO
partition (back-end), forward_taskmgmt_command() includes pointers
within the command area that will be used to wake up the issuing
process and provide the result when the command completes:
cmdrsp->scsitaskmgmt.notify_handle = (u64)¬ifyevent;
cmdrsp->scsitaskmgmt.notifyresult_handle = (u64)¬ifyresult;
'notify_handle' is a pointer to a 'wait_queue_head_t' variable, and
'notifyresult' is a pointer to an int. Both of these are just local
stack variables in the issuing process.
The way it's supposed to happen is that when the IO partition completes
the command, in our completion handling we get copies of those pointers
back from the IO partition, where we stash the result of the command at
'*notifyresult' (which should not be 0xffff, because that is the initial
value that the caller is looking to see a change in), and wake up the
wait queue at '*notify_handle'. There are several places we do that dance,
but prior to this patch, we always do it WRONG, like:
cmdrsp->scsitaskmgmt.notifyresult_handle = TASK_MGMT_FAILED;
wake_up_all((wait_queue_head_t *)cmdrsp->scsitaskmgmt.notify_handle);
The wake_up_all() part is correct (albeit with the help of the sloppy
pointer casting, but that's irrelevant to the bug), but the assignment of
'notifyresult_handle' is WRONG, and SHOULD read:
*(int *)(cmdrsp->scsitaskmgmt.notifyresult_handle) = TASK_MGMT_FAILED;
Without this change, the caller is NEVER going to notice a change in his
local value of 'notifyresult' when he does the:
if (!wait_event_timeout(notifyevent, notifyresult != 0xffff,
msecs_to_jiffies(45000)))
and hence will be timing out EVERY taskmgmt command.
This patch also eliminates the need for sloppy casting of pointers
back-and-forth between u64 values, with the help of idr_alloc() to provide
handles for us. It is the generated int handles we pass to the IO
partition to denote our completion context, and these are validated and
converted back to the required pointers when the task mgmt commands are
returned back to us by the IO partition.
== Testing ==
You must enable dynamic debugging in visorhba (build kernel with
'CONFIG_DYNAMIC_DEBUG=y', provide kernel parameter 'visorhba.dyndbg=+p')
to see kernel messages involved with visorhba scsi task mgmt commands,
which were added in this patch in the form of a few dev_dbg() / pr_debug()
messages.
In order to inject faults necessary to get visorhba to actully issue scsi
task mgmt commands, you will need to compile a kernel with
CONFIG_FAIL_IO_TIMEOUT and friends, in the "Kernel hacking" section:
* Enable "Fault-injection framework"
* Enable "Fault-injection capability for disk IO"
* Enable "Fault-injection capability for faking disk interrupts"
* Enable "Debugfs entries for fault-injection capabilities"
When running a kernel with those options, you can manually inject a fault
that will force a scsi task mgmt command to be issued like this:
# mount -t debugfs nodev /sys/kernel/debug
# cd /sys/kernel/debug/fail_io_timeout
# cat interval
1
# cat probability
0
# cat times
1
# echo 100 >probability
# cd /sys/block/sda
# l | grep fail
-rw-r--r-- 1 root root 4096 May 5 10:53 io-timeout-fail
-rw-r--r-- 1 root root 4096 May 5 10:54 make-it-fail
# echo 1 >io-timeout-fail
# echo 1 >make-it-fail
To test this patch, after performing the above steps, I did something to
force a block device i/o, then shortly afterwards examined the kernel log.
There I found evidence that visorhba had successfully issued a task mgmt
command, and that it completed successfully:
[ 333.352612] FAULT_INJECTION: forcing a failure.
name fail_io_timeout, interval 1, probability 100, space 0, times 1
[ 333.352617] CPU: 0 PID: 295 Comm: vhba_incoming Tainted: G C
4.6.0-rc3-ARCH+ #2
[ 333.352619] Hardware name: Dell Inc. PowerEdge T110/ ,
BIOS 1.23 12/15/2009
[ 333.352620] 0000000000000000 ffff88001d1a7dd0 ffffffff8125beeb
ffffffff818507c0
[ 333.352623] 0000000000000064 ffff88001d1a7df0 ffffffff8128047a
ffff8800113462b0
[ 333.352625] ffff88000e523000 ffff88001d1a7e00 ffffffff81241c79
ffff88001d1a7e18
[ 333.352627] Call Trace:
[ 333.352634] [<ffffffff8125beeb>] dump_stack+0x4d/0x72
[ 333.352637] [<ffffffff8128047a>] should_fail+0x11a/0x120
[ 333.352641] [<ffffffff81241c79>] blk_should_fake_timeout+0x29/0x30
[ 333.352643] [<ffffffff81241c36>] blk_complete_request+0x16/0x30
[ 333.352654] [<ffffffffa0118b36>] scsi_done+0x26/0x80 [scsi_mod]
[ 333.352657] [<ffffffffa014a56c>] process_incoming_rsps+0x2bc/0x770
[visorhba]
[ 333.352661] [<ffffffff81095630>] ? wait_woken+0x80/0x80
[ 333.352663] [<ffffffffa014a2b0>] ? add_scsipending_entry+0x100/0x100
[visorhba]
[ 333.352666] [<ffffffff81077759>] kthread+0xc9/0xe0
[ 333.352669] [<ffffffff814609d2>] ret_from_fork+0x22/0x40
[ 333.352671] [<ffffffff81077690>] ? kthread_create_on_node+0x180/0x180
[ 364.025672] sd 0:0:1:1: visorhba: initiating type=1 taskmgmt command
[ 364.029721] visorhba: notifying initiator with result=0x1
[ 364.029726] sd 0:0:1:1: visorhba: taskmgmt type=1 success; result=0x1
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We never issue SCSI commands of type CMD_VDISKMGMT_TYPE, so there is no
need to have code that processes their completions.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Addresses code audit feeback to switch from success handling to error
handling in visorhba_main.c/process_disk_notify().
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In del_scsipending_ent(), the error-path and main-path were switched, so
the error-path is handled like 'if (err) return;', and the main-path flows
down the left margin. This also allowed us to remove the initialization of
"sent".
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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