07 Jan, 2016
9 commits
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Because of the rudimentary design of the chip, it is necessary to poll the
SCSI bus signals during PIO and this tends to hog the CPU. The driver will
accept new commands while others execute, and this causes a soft lockup
because the workqueue item will not terminate until the issue queue is
emptied.When exercising dmx3191d using sequential IO from dd, the driver is sent
512 KiB WRITE commands and 128 KiB READs. For a PIO transfer, the rate is
is only about 300 KiB/s, so these are long-running commands. And although
PDMA may run at several MiB/s, interrupts are disabled for the duration
of the transfer.Fix the unresponsiveness and soft lockup issues by calling cond_resched()
after each command is completed and by limiting max_sectors for drivers
that don't implement real DMA.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Tested-by: Michael Schmitz
Signed-off-by: Martin K. Petersen -
The NCR5380 drivers have a home-spun linked list implementation for
scsi_cmnd structs that uses cmd->host_scribble as a 'next' pointer. Adopt
the standard list_head data structure and list operations instead. Remove
the eh_abort_handler rather than convert it. Doing the conversion would
only be churn because the existing EH handlers don't work and get replaced
in a subsequent patch.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Tested-by: Michael Schmitz
Signed-off-by: Martin K. Petersen -
Some NCR5380 hosts offer a .show_info method to access the contents of
the various command list data structures from a procfs file. When NDEBUG
is set, the same information is sent to the console during EH.The two core drivers, atari_NCR5380.c and NCR5380.c differ here. Because
it is just for debugging, the easiest way to fix the discrepancy is
simply remove this code.The only remaining users of NCR5380_show_info() and NCR5380_write_info()
are drivers that define PSEUDO_DMA. The others have no use for the
.show_info method, so don't initialize it.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Tested-by: Michael Schmitz
Signed-off-by: Martin K. Petersen -
Remove unused includes (stat.h, signal.h, proc_fs.h) and move includes
needed by the core drivers into the common header (delay.h etc).Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Tested-by: Michael Schmitz
Signed-off-by: Martin K. Petersen -
Follow the example of the atari_NCR5380.c core driver and adopt the
NCR5380_dma_xfer_len() hook. Implement NCR5380_dma_xfer_len() for dtc.c
and g_NCR5380.c to take care of the limitations of these cards. Keep the
default for drivers using PSEUDO_DMA.Eliminate the unused macro LIMIT_TRANSFERSIZE.
Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Tested-by: Michael Schmitz
Signed-off-by: Martin K. Petersen -
Allocate a work queue that will permit busy waiting and sleeping. This
means NCR5380_init() can potentially fail, so add this error path.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Tested-by: Michael Schmitz
Signed-off-by: Martin K. Petersen -
Commit 8b801ead3d7a ("[ARM] rpc: update Acorn SCSI drivers to modern ecard
interfaces") neglected to remove a request_region() call in cumana_1.c.Commit eda32612f7b2 ("[PATCH] give all LLDD driver a ->release method") in
history/history.git added some pointless release_region() calls in dtc.c,
pas16.c and t128.c.Fix these issues.
Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Signed-off-by: Martin K. Petersen -
This patch splits the NCR5380_init() function into two parts, similar
to the scheme used with atari_NCR5380.c. This avoids two problems.Firstly, NCR5380_init() may perform a bus reset, which would cause the
chip to assert IRQ. The chip is unable to mask its bus reset interrupt.
Drivers can't call request_irq() before calling NCR5380_init(), because
initialization must happen before the interrupt handler executes. If
driver initialization causes an interrupt it may be problematic on some
platforms. To avoid that, first move the bus reset code into
NCR5380_maybe_reset_bus().Secondly, NCR5380_init() contains some board-specific interrupt setup code
for the NCR53C400 that does not belong in the core driver. In moving this
code, better not re-order interrupt initialization and bus reset. Again,
the solution is to move the bus reset code into NCR5380_maybe_reset_bus().Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Signed-off-by: Martin K. Petersen -
The NCR5380_local_declare and NCR5380_setup macros exist to define and
initialize a particular local variable, to provide the address of the
chip registers needed for the driver's implementation of its
NCR5380_read/write register access macros.In cumana_1 and macscsi, these macros generate pointless code like this,
struct Scsi_Host *_instance;
_instance = instance;In pas16, the use of NCR5380_read/write in pas16_hw_detect() requires that
the io_port local variable has been defined and initialized, but the
NCR5380_local_declare and NCR5380_setup macros can't be used for that
purpose because the Scsi_Host struct has not yet been instantiated.Moreover, these macros were removed from atari_NCR5380.c long ago and
now they constitute yet another discrepancy between the two core driver
forks.Remove these "optimizations".
Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Ondrej Zary
Signed-off-by: Martin K. Petersen
01 Jun, 2015
1 commit
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'0' is now used as the default cmd_per_lun value,
so there's no need to explicitly set it to '1' in the
host template.Signed-off-by: Hannes Reinecke
Reviewed-by: Christoph Hellwig
Signed-off-by: James Bottomley
03 Feb, 2015
1 commit
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Using seq_printf to print a simple string is a lot more expensive than
it needs to be, since seq_puts exists. Replace seq_printf with
seq_puts when possible.Signed-off-by: Rasmus Villemoes
Reviewed-by: Finn Thain
Signed-off-by: Christoph Hellwig
20 Nov, 2014
7 commits
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Convert Scsi_Cmnd to struct scsi_cmnd and drop the #include "scsi.h".
The sun3_NCR5380.c core driver already uses struct scsi_cmnd so converting
the other core drivers reduces the diff which makes them easier to unify.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig -
The *_RELEASE macros don't tell me anything. In some cases the version in
the macro contradicts the version in the comments. Anyway, the Linux kernel
version is sufficient information. Remove these macros to improve readability.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig -
Static variables from dtc.c and pas16.c should not appear in the core
NCR5380.c driver. Aside from being a layering issue this worsens the
divergence between the three core driver variants (atari_NCR5380.c and
sun3_NCR5380.c don't support PSEUDO_DMA) and it can mean multiple hosts
share the same counters.Fix this by making the pseudo DMA spin counters in the core more generic.
This also avoids the abuse of the {DTC,PAS16}_PUBLIC_RELEASE macros, so
they can be removed.oak.c doesn't use PDMA and hence it doesn't use the counters and hence it
needs no write_info() method. Remove it.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig -
If the host->info() method is not set, then host->name is used by default.
For atari_scsi, that is exactly the same text. So remove the redundant
info() method. Keep sun3_scsi.c in line with atari_scsi.Some NCR5380 drivers return an empty string from the info() method
(arm/cumana_1.c arm/oak.c mac_scsi.c) while other drivers use the default
(dmx3191d dtc.c g_NCR5380.c pas16.c t128.c).Implement a common info() method to replace a lot of duplicated code which
the various drivers use to announce the same information.This replaces most of the (deprecated) show_info() output and all of the
NCR5380_print_info() output. This also eliminates a bunch of code in
g_NCR5380 which just duplicates functionality in the core driver.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig -
Oak scsi doesn't use any IRQ, but it sets irq = IRQ_NONE rather than
SCSI_IRQ_NONE. Problem is, the core NCR5380 driver expects SCSI_IRQ_NONE
if it is to issue IDENTIFY commands that prevent target disconnection.
And, as Geert points out, IRQ_NONE is part of enum irqreturn.Other drivers, when they can't get an IRQ or can't use one, will set
host->irq = SCSI_IRQ_NONE (that is, 255). But when they exit they will
attempt to free IRQ 255 which was never requested.Fix these bugs by using NO_IRQ in place of SCSI_IRQ_NONE and IRQ_NONE.
That means IRQ 0 is no longer probed by ISA drivers but I don't think
this matters.Setting IRQ = 255 for these ISA drivers is understood to mean no IRQ.
This remains supported so as to avoid breaking existing ISA setups (which
can be difficult to get working) and because existing documentation
(SANE, TLDP etc) describes this usage for the ISA NCR5380 driver options.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig -
Every NCR5380 driver sets AUTOSENSE so it need not be optional (and the
mid-layer expects it). Remove this redundant macro to improve readability.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig -
Some macros are never evaluated (i.e. FOO, USLEEP, SCSI2 and USE_WRAPPER;
and in some drivers, NCR5380_intr and NCR5380_proc_info). DRIVER_SETUP
serves no purpose anymore. Remove these macro definitions.Signed-off-by: Finn Thain
Reviewed-by: Hannes Reinecke
Tested-by: Michael Schmitz
Signed-off-by: Christoph Hellwig
12 Nov, 2014
5 commits
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Calling scsi_print_command should not be necessary during abort;
if the information is required one should enable scsi logging.Signed-off-by: Hannes Reinecke
Reviewed-by: Robert Elliott
Signed-off-by: Christoph Hellwig -
print_opcode_name() was only ever called with a '0' argument
from LLDDs and ULDs which were _not_ supporting variable length
CDBs, so the 'if' clause was never triggered.
Instead we should be using the last argument to specify
the cdb length to avoid accidental overflow when reading
the cdb buffer.Signed-off-by: Hannes Reinecke
Reviewed-by: Robert Elliott
Signed-off-by: Christoph Hellwig -
Update logging messages to use dev_printk() variants for correct
device annotations.Signed-off-by: Hannes Reinecke
Reviewed-by: Robert Elliott
Signed-off-by: Christoph Hellwig -
fas216 returns DID_BAD_TARGET for an incomplete data
transfer. The midlayer uses DID_BAD_TARGET to signal
a non-existing or not reachable target. So we should
rather be using DID_ERROR here.Signed-off-by: Hannes Reinecke
Reviewed-by: Robert Elliott
Signed-off-by: Christoph Hellwig -
Update acornscsi to use scsi_print_command() instead of the
underscore version and use scmd_printk() in acornscsi_done().
This will add correct device annotations in the resulting message.
And we should be using set_host_byte() for setting the
final result.Signed-off-by: Hannes Reinecke
Reviewed-by: Robert Elliott
Signed-off-by: Christoph Hellwig
18 Jul, 2014
1 commit
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The SCSI standard defines 64-bit values for LUNs, and large arrays
employing large or hierarchical LUN numbers become more and more
common.So update the linux SCSI stack to use 64-bit LUN numbers.
Signed-off-by: Hannes Reinecke
Reviewed-by: Christoph Hellwig
Reviewed-by: Ewan Milne
Signed-off-by: Christoph Hellwig
29 May, 2014
1 commit
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The acornscsi driver was added in v2.1.88. It has always #undef-ed
CONFIG_SCSI_ACORNSCSI_LINK near the top of acornscsi.c. And, just to be
sure, it has also always triggered a preprocessor error if
CONFIG_SCSI_ACORNSCSI_LINK was still defined. But, as far as I can see,
it has never even been possible to set SCSI_ACORNSCSI_LINK through
kconfig, or its predecessors, in the first place.Let's remove the code involved.
Signed-off-by: Paul Bolle
Acked-by: Russell King
Acked-by: Hannes Reinecke
Signed-off-by: Christoph Hellwig
28 May, 2014
1 commit
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BOARD_NORMAL is completely unused and BOARD_NCR53C400 is used only by
g_NCR5380 internally. Remove the unused definitions.Signed-off-by: Finn Thain
Acked-by: Sam Creasey
Signed-off-by: Christoph Hellwig
20 Mar, 2014
1 commit
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It's a NOOP since 2.6.35 and it will be removed one day.
[jejb: remove from missed arm scsi drivers]
Signed-off-by: Michael Opdenacker
Signed-off-by: James Bottomley
10 Apr, 2013
3 commits
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Signed-off-by: Al Viro
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Signed-off-by: Al Viro
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Signed-off-by: Al Viro
22 Jan, 2013
1 commit
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The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.CC: Russell King
CC: "James E.J. Bottomley"
Signed-off-by: Kees Cook
Signed-off-by: Greg Kroah-Hartman
04 Jan, 2013
1 commit
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CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.Cc: Bill Pemberton
Cc: Adam Radford
Cc: "James E.J. Bottomley"
Signed-off-by: Greg Kroah-Hartman
20 Oct, 2012
1 commit
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…nel/git/arm/arm-soc into fixes
A collection of warning fixes on non-ARM code from Arnd Bergmann:
* 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: s3c: mark s3c2440_clk_add as __init_refok
spi/s3c64xx: use correct dma_transfer_direction type
pcmcia: sharpsl: don't discard sharpsl_pcmcia_ops
USB: EHCI: mark ehci_orion_conf_mbus_windows __devinit
mm/slob: use min_t() to compare ARCH_SLAB_MINALIGN
SCSI: ARM: make fas216_dumpinfo function conditional
SCSI: ARM: ncr5380/oak uses no interrupts
10 Oct, 2012
2 commits
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The fas216_dumpinfo function is only used by __fas216_checkmagic,
which is conditionally compiled, so we should put both functions
inside of the same #ifdef.Without this patch, building rpc_defconfig results in:
drivers/scsi/arm/fas216.c:182:13: warning: 'fas216_dumpinfo' defined but not used [-Wunused-function]
Signed-off-by: Arnd Bergmann
Cc: Russell King
Cc: "James E.J. Bottomley"
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-scsi@vger.kernel.org -
The ncr5380 driver is included by multiple board specific
drivers, which may or may not use the interrupt handler.
The oak variant doesn't, and should set the DONT_USE_INTR
macro.Without this patch, building rpc_defconfig results in:
drivers/scsi/arm/../NCR5380.c:1160:20: warning: 'oakscsi_intr' defined but not used [-Wunused-function]
Signed-off-by: Arnd Bergmann
Cc: Russell King
Cc: "James E.J. Bottomley"
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-scsi@vger.kernel.org
19 Sep, 2012
1 commit
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ARM is moving to stricter checks on readl/write functions,
so we need to use the correct types everywhere.Cc: "James E.J. Bottomley"
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Arnd Bergmann
29 Mar, 2012
2 commits
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…m/linux/kernel/git/dhowells/linux-asm_system
Pull "Disintegrate and delete asm/system.h" from David Howells:
"Here are a bunch of patches to disintegrate asm/system.h into a set of
separate bits to relieve the problem of circular inclusion
dependencies.I've built all the working defconfigs from all the arches that I can
and made sure that they don't break.The reason for these patches is that I recently encountered a circular
dependency problem that came about when I produced some patches to
optimise get_order() by rewriting it to use ilog2().This uses bitops - and on the SH arch asm/bitops.h drags in
asm-generic/get_order.h by a circuituous route involving asm/system.h.The main difficulty seems to be asm/system.h. It holds a number of
low level bits with no/few dependencies that are commonly used (eg.
memory barriers) and a number of bits with more dependencies that
aren't used in many places (eg. switch_to()).These patches break asm/system.h up into the following core pieces:
(1) asm/barrier.h
Move memory barriers here. This already done for MIPS and Alpha.
(2) asm/switch_to.h
Move switch_to() and related stuff here.
(3) asm/exec.h
Move arch_align_stack() here. Other process execution related bits
could perhaps go here from asm/processor.h.(4) asm/cmpxchg.h
Move xchg() and cmpxchg() here as they're full word atomic ops and
frequently used by atomic_xchg() and atomic_cmpxchg().(5) asm/bug.h
Move die() and related bits.
(6) asm/auxvec.h
Move AT_VECTOR_SIZE_ARCH here.
Other arch headers are created as needed on a per-arch basis."
Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that. We'll find out anything that got broken and fix it..* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
Delete all instances of asm/system.h
Remove all #inclusions of asm/system.h
Add #includes needed to permit the removal of asm/system.h
Move all declarations of free_initmem() to linux/mm.h
Disintegrate asm/system.h for OpenRISC
Split arch_align_stack() out from asm-generic/system.h
Split the switch_to() wrapper out of asm-generic/system.h
Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
Create asm-generic/barrier.h
Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
Disintegrate asm/system.h for Xtensa
Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
Disintegrate asm/system.h for Tile
Disintegrate asm/system.h for Sparc
Disintegrate asm/system.h for SH
Disintegrate asm/system.h for Score
Disintegrate asm/system.h for S390
Disintegrate asm/system.h for PowerPC
Disintegrate asm/system.h for PA-RISC
Disintegrate asm/system.h for MN10300
... -
Remove all #inclusions of asm/system.h preparatory to splitting and killing
it. Performed with the following command:perl -p -i -e 's!^#\s*include\s*.*\n!!' `grep -Irl '^#\s*include\s*' *`
Signed-off-by: David Howells
24 Mar, 2012
1 commit
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Get rid of the NO_IRQ madness from Acorn expansion card handling code.
Thankfully, are relatively few users of this here, and so it's easy to
audit.Signed-off-by: Russell King
31 Mar, 2011
1 commit
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Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi
