- Nov 24, 2014
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Sumit.Saxena@avagotech.com authored
In OCR (Online Controller Reset) path, driver sets adapter state to MEGASAS_HBA_OPERATIONAL before getting new RAID map. There will be a small window where IO will come from OS with old RAID map. This patch will update adapter state to MEGASAS_HBA_OPERATIONAL, only after driver has new RAID map to avoid any IOs getting build using old RAID map. Signed-off-by:
Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by:
Kashyap Desai <kashyap.desai@avagotech.com> Reviewed-by:
Tomas Henzl <thenzl@redhat.com> Signed-off-by:
Christoph Hellwig <hch@lst.de>
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Sumit.Saxena@avagotech.com authored
Update MAINTAINERS list and copyright information for megaraid_sas driver. Signed-off-by:
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Sumit.Saxena@avagotech.com authored
Update driver version and remove some meta data (release date and extended version) about megaraid_sas driver. Signed-off-by:
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- Nov 20, 2014
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Martin Peschke authored
This patch improves the Fibre Channel port scan behaviour of the zfcp lldd. Without it the zfcp device driver may churn up the storage area network by excessive scanning and scan bursts, particularly in big virtual server environments, potentially resulting in interference of virtual servers and reduced availability of storage connectivity. The two main issues as to the zfcp device drivers automatic port scan in virtual server environments are frequency and simultaneity. On the one hand, there is no point in allowing lots of ports scans in a row. It makes sense, though, to make sure that a scan is conducted eventually if there has been any indication for potential SAN changes. On the other hand, lots of virtual servers receiving the same indication for a SAN change had better not attempt to conduct a scan instantly, that is, at the same time. Hence this patch has a two-fold approach for better port scanning: the introduction of a rate limit to amend frequency issues, and the introduction of a short random backoff to amend simultaneity issues. Both approaches boil down to deferred port scans, with delays comprising parts for both approaches. The new port scan behaviour is summarised best by: NEW: NEW: no_auto_port_rescan random rate flush backoff limit =wait adapter resume/thaw yes yes no yes* adapter online (user) no yes no yes* port rescan (user) no no no yes adapter recovery (user) yes yes yes no adapter recovery (other) yes yes yes no incoming ELS yes yes yes no incoming ELS lost yes yes yes no Implementation is straight-forward by converting an existing worker to a delayed worker. But care is needed whenever that worker is going to be flushed (in order to make sure work has been completed), since a flush operation cancels the timer set up for deferred execution (see * above). There is a small race window whenever a port scan work starts running up to the point in time of storing the time stamp for that port scan. The impact is negligible. Closing that gap isn't trivial, though, and would the destroy the beauty of a simple work-to-delayed-work conversion. Signed-off-by:Martin Peschke <mpeschke@linux.vnet.ibm.com> Signed-off-by:
Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
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Steffen Maier authored
Through sysfs attributes, zfcp unit objects provide a trigger for manual LUN recovery and export information for problem determination. With commit f8210e34 "[SCSI] zfcp: Allow midlayer to scan for LUNs when running in NPIV mode" and when attaching SCSI devices through this new optional method, no more zfcp unit objects are allocated for such SCSI devices. Hence, the above-mentioned trigger and information were missing. The information and context is located in SCSI transport device data since b62a8d9b "[SCSI] zfcp: Use SCSI device data zfcp_scsi_dev instead of zfcp_unit" 57c23773 "[SCSI] zfcp: Add zfcp private struct as SCSI device driver data" Hence, introduce the trigger and the information unconditionally for all SCSI devices attached through zfcp. We prefix the attribute names with 'zfcp_' to prevent collisions and to avoid mix-ups such as with the common 'state' attribute. Since some of the new attribute views do not need zfcp_port in the ZFCP_DEFINE_SCSI_ATTR helper macro, remove zfcp_port to avoid compiler warnings on unused variable. It's easy to open code the conversion from zfcp_scsi_dev to zfcp_port for the two already existing attributes hba_id and wwpn. Signed-off-by:
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Fabian Frederick authored
This patch also removes unnecessary printk(KERN_INFO Signed-off-by:
Fabian Frederick <fabf@skynet.be> Acked-by:
Anil Gurumurthy <anil.gurumurthy@qlogic.com> Signed-off-by:
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Martin Peschke authored
This patch removes some leftovers for commit 663e0890 "[SCSI] zfcp: remove access control tables interface". The "access denied" case for ports is gone, as well. The corresponding flag was cleared, but never set. So clean it up. Sysfs flag is kept, though, for backward-compatibility. Now it returns always 0. Signed-off-by:
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Ming Lei authored
Since virtio_scsi has supported multi virtqueue already, it is natural to map the virtque to hw-queue of blk-mq. Signed-off-by:
Ming Lei <ming.lei@canonical.com> Reviewed-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Stephen M. Cameron authored
It is already using atomic test_and_set_bit to do the allocation. There is some microscopic chance of starvation, but it is so microscopic that it should never happen in reality. Signed-off-by:
Don Brace <don.brace@pmcs.com> Reviewed-by:
Webb Scales <webbnh@hp.com> Signed-off-by:
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Robert Elliott authored
If the kernel is booted with the reset_device parameter, which is done for kdump, then the driver needs to call pci_set_master after pci_enable_device to reenable bus mastering (since the preceding pci_disable_device call disables bus mastering). Also, place that after pci_request_regions both in the kdump code and the normal pci_init code. Remove the comment summarizing what pci_set_master does, with the incomplete commentary on the impact of pci_disable_device. Signed-off-by:
Robert Elliott <elliott@hp.com> Signed-off-by:
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Nicholas Bellinger authored
There isn't anything in hpsa that requires the host lock to be held during queuecommand. Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org> Reviewed-by:
Stephen M. Cameron <stephenmcameron@gmail.com> Signed-off-by:
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Stephen M. Cameron authored
We were printing a lot of useless information before ultimately just passing things up to the SCSI mid layer. Just let the midlayer handle it without LLD chatter. Signed-off-by:
Joe Handzik <joseph.t.handzik@hp.com> Reviewed-by:
Scott Teel <scott.teel@hp.com> Signed-off-by:
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Stephen M. Cameron authored
Use atomics for commands_outstanding instead of protecting with spin locks. Signed-off-by:
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Stephen M. Cameron authored
Using bit fields for hardware command fields isn't portable and relies on assumptions about how the compiler lays out the bits. We can fix this in the driver's internal command structure, but the ioctl interface we can't change because it is part of the userland ABI. Signed-off-by:
Webb Scales <webb.scales@hp.com> Signed-off-by:
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Stephen M. Cameron authored
The hardware needs little endian scatter gather addresses and lengths but we were not bothering to convert from cpu byte order as we should have been. On Intel, this is all just a bunch of no-ops macros, but it makes the code endian-clean(er). Signed-off-by:
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Stephen M. Cameron authored
We were allocating roughly double the amount of memory we should be due to ReportLUNdata and ExtendedReportLUNdata containing a non-zero sized array but adding extra memory to allocate as if the array were zero sized. Track the logical and physical sizes separately. Allocate the memory based on the specific data structure sizes. Signed-off-by:
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Stephen M. Cameron authored
In the case of LUN data changing, the driver will auto rescan and so it's not even true that "action" is "required". Remove "action required" phrases from warning messages and replace with description phrases. Signed-off-by:
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Webb Scales authored
Correct the size calculation of the chained SG block Signed-off-by:
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Stephen M. Cameron authored
Fix a couple of pci id table mistakes: Subdevice ID 0x3323 missing from product[] table (another name for HP Smart Storage 1210m) Bogus 0x1925 subdevice id removed from hpsa_pci_device_id[] (no such thing.) Signed-off-by:
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Robert Elliott authored
RAID-1ADM is unusable with dev_warn called on every command. Signed-off-by:
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Don Brace authored
Clean up issues reported when running sparse. Signed-off-by:
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Finn Thain authored
Signed-off-by:
Finn Thain <fthain@telegraphics.com.au> Signed-off-by:
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Finn Thain authored
There's no need to run the cmd->done callback for aborted commands. Remove the old EH code and the RESET_RUN_DONE macro. Signed-off-by:
Michael Schmitz <schmitzmic@gmail.com> Signed-off-by:
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Finn Thain authored
Unlike NCR5380.c, the atari_NCR5380.c core driver is limited to a single instance because co-routine state is stored globally. Fix this by removing the static scsi host pointer. For the co-routine, obtain this pointer from the work_struct pointer instead. For the interrupt handler, obtain it from the dev_id argument. Signed-off-by:
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Finn Thain authored
The atari_NCR5380.c core driver keeps some per-host data in a static variable which limits the driver to a single instance. Fix this by moving TagAlloc to the hostdata struct. Signed-off-by:
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Finn Thain authored
The static variable setup_use_tagged_queuing is declared in mac_scsi.c, sun3_scsi.c and atari_scsi.c and doesn't belong in the core driver. None of the other NCR5380 drivers suffer from this layering issue which makes merging the core drivers more difficult and will likely hinder plans for future use of platform data to configure the driver. Replace the static variable with a host flag. This way it can be reported along with the other flags. Signed-off-by:
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Finn Thain authored
The NCR5380.c core driver has moved on since the atari_NCR5380.c fork. Some of those changes are also relevant to atari_NCR5380.c so apply them there as well. Signed-off-by:
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Finn Thain authored
Given the preceding changes to atari_NCR5380.c, this patch should not change behaviour of the sun3_scsi and sun3_scsi_vme modules. Signed-off-by:
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Finn Thain authored
There is very little difference between the sun3_NCR5380.c core driver and atari_NCR5380.c. The former is a fork of the latter. Merge the sun3_NCR5380.c core driver into atari_NCR5380.c so that sun3_scsi.c can adopt the latter and the former can be deleted. Signed-off-by:
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Finn Thain authored
Simplify falcon_release_lock_if_possible() by making callers responsible for disabling local IRQ's, which they must do anyway to correctly synchronize the ST DMA "lock" with core driver data structures. Move this synchronization logic to the core driver with which it is tightly coupled. Other LLD's like sun3_scsi and mac_scsi that can make use of this core driver can just stub out the NCR5380_acquire_dma_irq() and NCR5380_release_dma_irq() calls so the compiler will eliminate the ST DMA code. Remove a redundant local_irq_save/restore pair (irq's are disabled for interrupt handlers these days). Revise the locking for atari_scsi_bus_reset(): use local_irq_save/restore() instead of atari_turnoff/turnon_irq(). There is no guarantee that atari_scsi still holds the ST DMA lock during EH, so atari_turnoff/turnon_irq() could end up dropping an IDE or floppy interrupt. Signed-off-by:
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Finn Thain authored
Make the atari_NCR5380.c core driver usable by sun3_scsi, mac_scsi and others by moving some of the Falcon-specific code out of the core driver: !IS_A_TT, atari_read_overruns and falcon_dont_release. Replace these with hostdata variables and flags. FLAG_CHECK_LAST_BYTE_SENT is unused in atari_NCR5380.c so don't set it. Signed-off-by:
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Finn Thain authored
atari_NCR5380.c enables its IRQ when it is already enabled. Sun3 doesn't use the ENABLE_IRQ/DISABLE_IRQ cruft. Remove it. Signed-off-by:
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Finn Thain authored
The #defines in sun3_scsi.h are intended to influence subsequent #includes in sun3_scsi.c. IMHO, that's too convoluted. Move sun3_scsi.h macro definitions to sun3_scsi.c, consistent with other NCR5380 drivers. Omit the unused NCR5380_local_declare() and NCR5380_setup() macros. Signed-off-by:
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Finn Thain authored
Convert sun3_scsi to platform device and eliminate scsi_register(). Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Finn Thain authored
The #defines in atari_scsi.h are intended to influence subsequent #includes in atari_scsi.c. IMHO, that's too convoluted. Remove atari_scsi.h by moving those macro definitions to atari_scsi.c, consistent with other NCR5380 drivers. Signed-off-by:
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Finn Thain authored
Convert atari_scsi to platform device and eliminate scsi_register(). Validate __setup options later on so that module options are checked as well. Remove the comment about the scsi mid-layer disabling the host irq as it is no longer true (AFAICT). Also remove the obsolete slow interrupt stuff (IRQ_TYPE_SLOW == 0 anyway). Signed-off-by:
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Finn Thain authored
Don't disable irqs when waiting for the ST DMA "lock"; its release may require an interrupt. Introduce stdma_try_lock() for use in soft irq context. atari_scsi now tells the SCSI mid-layer to defer queueing a command if the ST DMA lock is not available, as per Michael's patch: http://marc.info/?l=linux-m68k&m=139095335824863&w=2 The falcon_got_lock variable is race prone: we can't disable IRQs while waiting to acquire the lock, so after acquiring it there must be some interval during which falcon_got_lock remains false. Introduce stdma_is_locked_by() to replace falcon_got_lock. The falcon_got_lock tests in the EH handlers are incorrect these days. It can happen that an EH handler is called after a command completes normally. Remove these checks along with falcon_got_lock. Also remove the complicated and racy fairness wait queues. If fairness is an issue (when SCSI competes with IDE for the ST DMA interrupt), the solution is likely to be a lower value for host->can_queue. Signed-off-by:
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Finn Thain authored
Convert mac_scsi to platform device and eliminate scsi_register(). Platform resources for chip registers now follow the documentation. This should fix issues with the Mac IIci (and possibly other models too). Signed-off-by:
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Finn Thain authored
Fix whitespace, remove pointless volatile qualifiers and improve code style by use of INPUT_DATA_REG and OUTPUT_DATA_REG macros. Signed-off-by:
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Finn Thain authored
Allow mac_scsi to be built as a module. Replace the old validation of __setup options with code that validates both module and __setup options. Signed-off-by:
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