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The spec states:
"The settings are not retained across a Controller Level Reset"
Therefore the driver must enable the shadow doorbell, after each reset.
This was caught while testing the nvme driver over upcoming nvme-mdev
device.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Minwoo Im <minwoo.im@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Most command aren't PCIe specific, so move the size checking for them
to core.c
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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All the NVMe command has 64bytes fixed size so that it has been assured
with BUILD_BUG_ON(). The remaining command structures in linux/nvme.h
also need to be checked here.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Variable "n" will be assigned once kstrtoint() succeeds, otherwise it
will not be referred because kstrtoint() will return an error which
means go out from this function.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Just like IO queues, the admin queue also will not be restarted after a
controller shutdown. Unquiesce this queue so that we do not block
request dispatch on a permanently disabled controller.
Reported-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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We do not restart a controller in a deleting state for timeout errors.
When in this state, unblock potential request dispatchers with failed
completions by shutting down the controller on timeout detection.
Reported-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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The shortcut for single segment SGL requests did not set the PSDT field
to mark the request as using SGLs.
Fixes: 297910571f08 ("nvme-pci: optimize mapping single segment requests using SGLs")
Signed-off-by: Klaus Birkelund Jensen <klaus.jensen@cnexlabs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Remove two pointless local variables, remove ret assignment that is
never used, move the use_sgl initialization closer to where it is used.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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If the controller supports SGLs we can take another short cut for single
segment request, given that we can always map those without another
indirection structure, and thus don't need to create a scatterlist
structure.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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If a request is single segment and fits into one or two PRP entries we
do not have to create a scatterlist for it, but can just map the bio_vec
directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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We'll have a better way to optimize for small I/O that doesn't
require it soon, so remove the existing inline_sg case to make that
optimization easier to implement.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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This prepares for some bigger changes to the data mapping helpers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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We always have exactly one segment, so we can simply call dma_map_bvec.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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This mirrors how nvme_map_pci is called and will allow simplifying some
checks in nvme_unmap_pci later on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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This means we now have a function that undoes everything nvme_map_data
does and we can simplify the error handling a bit.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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Cleaning up the command setup isn't related to unmapping data, and
disentangling them will simplify error handling a bit down the road.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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nvme_init_iod should really be split into two parts: initialize a few
general iod fields, which can easily be done at the beginning of
nvme_queue_rq, and allocating the scatterlist if needed, which logically
belongs into nvme_map_data with the code making use of it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
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Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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We don't need to save the dma device as it's not used in the hot path
and hasn't in a long time. Shrink the struct nvme_queue removing this
unnecessary member.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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A negative value for the cq_vector used to mean the queue is either
disabled or a polled queue. However, we have a queue enabled flag,
so the cq_vector had been serving double duty.
Don't overload the meaning of cq_vector. Use a flag specific to the
polled queues instead.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Pull more block layer changes from Jens Axboe:
"This is a collection of both stragglers, and fixes that came in after
I finalized the initial pull. This contains:
- An MD pull request from Song, with a few minor fixes
- Set of NVMe patches via Christoph
- Pull request from Konrad, with a few fixes for xen/blkback
- pblk fix IO calculation fix (Javier)
- Segment calculation fix for pass-through (Ming)
- Fallthrough annotation for blkcg (Mathieu)"
* tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block: (25 commits)
blkcg: annotate implicit fall through
nvme-tcp: support C2HData with SUCCESS flag
nvmet: ignore EOPNOTSUPP for discard
nvme: add proper write zeroes setup for the multipath device
nvme: add proper discard setup for the multipath device
nvme: remove nvme_ns_config_oncs
nvme: disable Write Zeroes for qemu controllers
nvmet-fc: bring Disconnect into compliance with FC-NVME spec
nvmet-fc: fix issues with targetport assoc_list list walking
nvme-fc: reject reconnect if io queue count is reduced to zero
nvme-fc: fix numa_node when dev is null
nvme-fc: use nr_phys_segments to determine existence of sgl
nvme-loop: init nvmet_ctrl fatal_err_work when allocate
nvme: update comment to make the code easier to read
nvme: put ns_head ref if namespace fails allocation
nvme-trace: fix cdw10 buffer overrun
nvme: don't warn on block content change effects
nvme: add get-feature to admin cmds tracer
md: Fix failed allocation of md_register_thread
It's wrong to add len to sector_nr in raid10 reshape twice
...
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Qemu started out with a broken implementation of Write Zeroes written
by yours truly. Disable Write Zeroes on qemu for now, eventually
we need to go back and make all the qemu quirks version specific,
but that is left for another time.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Tested-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull block layer updates from Jens Axboe:
"Not a huge amount of changes in this round, the biggest one is that we
finally have Mings multi-page bvec support merged. Apart from that,
this pull request contains:
- Small series that avoids quiescing the queue for sysfs changes that
match what we currently have (Aleksei)
- Series of bcache fixes (via Coly)
- Series of lightnvm fixes (via Mathias)
- NVMe pull request from Christoph. Nothing major, just SPDX/license
cleanups, RR mp policy (Hannes), and little fixes (Bart,
Chaitanya).
- BFQ series (Paolo)
- Save blk-mq cpu -> hw queue mapping, removing a pointer indirection
for the fast path (Jianchao)
- fops->iopoll() added for async IO polling, this is a feature that
the upcoming io_uring interface will use (Christoph, me)
- Partition scan loop fixes (Dongli)
- mtip32xx conversion from managed resource API (Christoph)
- cdrom registration race fix (Guenter)
- MD pull from Song, two minor fixes.
- Various documentation fixes (Marcos)
- Multi-page bvec feature. This brings a lot of nice improvements
with it, like more efficient splitting, larger IOs can be supported
without growing the bvec table size, and so on. (Ming)
- Various little fixes to core and drivers"
* tag 'for-5.1/block-20190302' of git://git.kernel.dk/linux-block: (117 commits)
block: fix updating bio's front segment size
block: Replace function name in string with __func__
nbd: propagate genlmsg_reply return code
floppy: remove set but not used variable 'q'
null_blk: fix checking for REQ_FUA
block: fix NULL pointer dereference in register_disk
fs: fix guard_bio_eod to check for real EOD errors
blk-mq: use HCTX_TYPE_DEFAULT but not 0 to index blk_mq_tag_set->map
block: optimize bvec iteration in bvec_iter_advance
block: introduce mp_bvec_for_each_page() for iterating over page
block: optimize blk_bio_segment_split for single-page bvec
block: optimize __blk_segment_map_sg() for single-page bvec
block: introduce bvec_nth_page()
iomap: wire up the iopoll method
block: add bio_set_polled() helper
block: wire up block device iopoll method
fs: add an iopoll method to struct file_operations
loop: set GENHD_FL_NO_PART_SCAN after blkdev_reread_part()
loop: do not print warn message if partition scan is successful
block: bounce: make sure that bvec table is updated
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"The interrupt departement delivers this time:
- New infrastructure to manage NMIs on platforms which have a sane
NMI delivery, i.e. identifiable NMI vectors instead of a single
lump.
- Simplification of the interrupt affinity management so drivers
don't have to implement ugly loops around the PCI/MSI enablement.
- Speedup for interrupt statistics in /proc/stat
- Provide a function to retrieve the default irq domain
- A new interrupt controller for the Loongson LS1X platform
- Affinity support for the SiFive PLIC
- Better support for the iMX irqsteer driver
- NUMA aware memory allocations for GICv3
- The usual small fixes, improvements and cleanups all over the
place"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
irqchip/imx-irqsteer: Add multi output interrupts support
irqchip/imx-irqsteer: Change to use reg_num instead of irq_group
dt-bindings: irq: imx-irqsteer: Add multi output interrupts support
dt-binding: irq: imx-irqsteer: Use irq number instead of group number
irqchip/brcmstb-l2: Use _irqsave locking variants in non-interrupt code
irqchip/gicv3-its: Use NUMA aware memory allocation for ITS tables
irqdomain: Allow the default irq domain to be retrieved
irqchip/sifive-plic: Implement irq_set_affinity() for SMP host
irqchip/sifive-plic: Differentiate between PLIC handler and context
irqchip/sifive-plic: Add warning in plic_init() if handler already present
irqchip/sifive-plic: Pre-compute context hart base and enable base
PCI/MSI: Remove obsolete sanity checks for multiple interrupt sets
genirq/affinity: Remove the leftovers of the original set support
nvme-pci: Simplify interrupt allocation
genirq/affinity: Add new callback for (re)calculating interrupt sets
genirq/affinity: Store interrupt sets size in struct irq_affinity
genirq/affinity: Code consolidation
irqchip/irq-sifive-plic: Check and continue in case of an invalid cpuid.
irqchip/i8259: Fix shutdown order by moving syscore_ops registration
dt-bindings: interrupt-controller: loongson ls1x intc
...
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Update license to use SPDX-License-Identifier instead of verbose license
text.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
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This patch avoids that the compiler complains about 'ret' being set
but not being used when building with W=1.
Fixes: 3b6592f70ad7 ("nvme: utilize two queue maps, one for reads and one for writes") # v5.0-rc1
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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The NVME PCI driver contains a tedious mechanism for interrupt
allocation, which is necessary to adjust the number and size of interrupt
sets to the maximum available number of interrupts which depends on the
underlying PCI capabilities and the available CPU resources.
It works around the former short comings of the PCI and core interrupt
allocation mechanims in combination with interrupt sets.
The PCI interrupt allocation function allows to provide a maximum and a
minimum number of interrupts to be allocated and tries to allocate as
many as possible. This worked without driver interaction as long as there
was only a single set of interrupts to handle.
With the addition of support for multiple interrupt sets in the generic
affinity spreading logic, which is invoked from the PCI interrupt
allocation, the adaptive loop in the PCI interrupt allocation did not
work for multiple interrupt sets. The reason is that depending on the
total number of interrupts which the PCI allocation adaptive loop tries
to allocate in each step, the number and the size of the interrupt sets
need to be adapted as well. Due to the way the interrupt sets support was
implemented there was no way for the PCI interrupt allocation code or the
core affinity spreading mechanism to invoke a driver specific function
for adapting the interrupt sets configuration.
As a consequence the driver had to implement another adaptive loop around
the PCI interrupt allocation function and calling that with maximum and
minimum interrupts set to the same value. This ensured that the
allocation either succeeded or immediately failed without any attempt to
adjust the number of interrupts in the PCI code.
The core code now allows drivers to provide a callback to recalculate the
number and the size of interrupt sets during PCI interrupt allocation,
which in turn allows the PCI interrupt allocation function to be called
in the same way as with a single set of interrupts. The PCI code handles
the adaptive loop and the interrupt affinity spreading mechanism invokes
the driver callback to adapt the interrupt set configuration to the
current loop value. This replaces the adaptive loop in the driver
completely.
Implement the NVME specific callback which adjusts the interrupt sets
configuration and remove the adaptive allocation loop.
[ tglx: Simplify the callback further and restore the dropped adjustment of
number of sets ]
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-nvme@lists.infradead.org
Cc: linux-pci@vger.kernel.org
Cc: Keith Busch <keith.busch@intel.com>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Shivasharan Srikanteshwara <shivasharan.srikanteshwara@broadcom.com>
Link: https://lkml.kernel.org/r/20190216172228.602546658@linutronix.de
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The interrupt affinity spreading mechanism supports to spread out
affinities for one or more interrupt sets. A interrupt set contains one
or more interrupts. Each set is mapped to a specific functionality of a
device, e.g. general I/O queues and read I/O queus of multiqueue block
devices.
The number of interrupts per set is defined by the driver. It depends on
the total number of available interrupts for the device, which is
determined by the PCI capabilites and the availability of underlying CPU
resources, and the number of queues which the device provides and the
driver wants to instantiate.
The driver passes initial configuration for the interrupt allocation via
a pointer to struct irq_affinity.
Right now the allocation mechanism is complex as it requires to have a
loop in the driver to determine the maximum number of interrupts which
are provided by the PCI capabilities and the underlying CPU resources.
This loop would have to be replicated in every driver which wants to
utilize this mechanism. That's unwanted code duplication and error
prone.
In order to move this into generic facilities it is required to have a
mechanism, which allows the recalculation of the interrupt sets and
their size, in the core code. As the core code does not have any
knowledge about the underlying device, a driver specific callback will
be added to struct affinity_desc, which will be invoked by the core
code. The callback will get the number of available interupts as an
argument, so the driver can calculate the corresponding number and size
of interrupt sets.
To support this, two modifications for the handling of struct irq_affinity
are required:
1) The (optional) interrupt sets size information is contained in a
separate array of integers and struct irq_affinity contains a
pointer to it.
This is cumbersome and as the maximum number of interrupt sets is small,
there is no reason to have separate storage. Moving the size array into
struct affinity_desc avoids indirections and makes the code simpler.
2) At the moment the struct irq_affinity pointer which is handed in from
the driver and passed through to several core functions is marked
'const'.
With the upcoming callback to recalculate the number and size of
interrupt sets, it's necessary to remove the 'const'
qualifier. Otherwise the callback would not be able to update the data.
Implement #1 and store the interrupt sets size in 'struct irq_affinity'.
No functional change.
[ tglx: Fixed the memcpy() size so it won't copy beyond the size of the
source. Fixed the kernel doc comments for struct irq_affinity and
de-'This patch'-ed the changelog ]
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-nvme@lists.infradead.org
Cc: linux-pci@vger.kernel.org
Cc: Keith Busch <keith.busch@intel.com>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Shivasharan Srikanteshwara <shivasharan.srikanteshwara@broadcom.com>
Link: https://lkml.kernel.org/r/20190216172228.423723127@linutronix.de
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The reset work holds a mutex to prevent races with removal modifying the
same resources, but was unlocking only on success. Unlock on failure
too.
Fixes: 5c959d73dba64 ("nvme-pci: fix rapid add remove sequence")
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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A surprise removal may fail to tear down request queues if it is racing
with the initial asynchronous probe. If that happens, the remove path
won't see the queue resources to tear down, and the controller reset
path may create a new request queue on a removed device, but will not
be able to make forward progress, deadlocking the pci removal.
Protect setting up non-blocking resources from a shutdown by holding the
same mutex, and transition to the CONNECTING state after these resources
are initialized so the probe path may see the dead controller state
before dispatching new IO.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=202081
Reported-by: Alex Gagniuc <Alex_Gagniuc@Dellteam.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Tested-by: Alex Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Pull block fixes from Jens Axboe:
- block size setting fixes for loop/nbd (Jan Kara)
- md bio_alloc_mddev() cleanup (Marcos)
- Ensure we don't lose the REQ_INTEGRITY flag (Ming)
- Two NVMe fixes by way of Christoph:
- Fix NVMe IRQ calculation (Ming)
- Uninitialized variable in nvmet-tcp (Sagi)
- BFQ comment fix (Paolo)
- License cleanup for recently added blk-mq-debugfs-zoned (Thomas)
* tag 'for-linus-20190118' of git://git.kernel.dk/linux-block:
block: Cleanup license notice
nvme-pci: fix nvme_setup_irqs()
nvmet-tcp: fix uninitialized variable access
block: don't lose track of REQ_INTEGRITY flag
blockdev: Fix livelocks on loop device
nbd: Use set_blocksize() to set device blocksize
md: Make bio_alloc_mddev use bio_alloc_bioset
block, bfq: fix comments on __bfq_deactivate_entity
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When -ENOSPC is returned from pci_alloc_irq_vectors_affinity(),
we still try to allocate multiple irq vectors again, so irq queues
covers the admin queue actually. But we don't consider that, then
number of the allocated irq vector may be same with sum of
io_queues[HCTX_TYPE_DEFAULT] and io_queues[HCTX_TYPE_READ], this way
is obviously wrong, and finally breaks nvme_pci_map_queues(), and
warning from pci_irq_get_affinity() is triggered.
IRQ queues should cover admin queues, this patch makes this
point explicitely in nvme_calc_io_queues().
We got severl boot failure internal report on aarch64, so please
consider to fix it in v4.20.
Fixes: 6451fe73fa0f ("nvme: fix irq vs io_queue calculations")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Tested-by: fin4478 <fin4478@hotmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull block fixes from Jens Axboe:
- NVMe pull request from Christoph, with little fixes all over the map
- Loop caching fix for offset/bs change (Jaegeuk Kim)
- Block documentation tweaks (Jeff, Jon, Weiping, John)
- null_blk zoned tweak (John)
- ahch mvebu suspend/resume support. Should have gone into the merge
window, but there was some confusion on which tree had it. (Miquel)
* tag 'for-linus-20190112' of git://git.kernel.dk/linux-block: (22 commits)
ata: ahci: mvebu: request PHY suspend/resume for Armada 3700
ata: ahci: mvebu: add Armada 3700 initialization needed for S2RAM
ata: ahci: mvebu: do Armada 38x configuration only on relevant SoCs
ata: ahci: mvebu: remove stale comment
ata: libahci_platform: comply to PHY framework
loop: drop caches if offset or block_size are changed
block: fix kerneldoc comment for blk_attempt_plug_merge()
nvme: don't initlialize ctrl->cntlid twice
nvme: introduce NVME_QUIRK_IGNORE_DEV_SUBNQN
nvme: pad fake subsys NQN vid and ssvid with zeros
nvme-multipath: zero out ANA log buffer
nvme-fabrics: unset write/poll queues for discovery controllers
nvme-tcp: don't ask if controller is fabrics
nvme-tcp: remove dead code
nvme-pci: fix out of bounds access in nvme_cqe_pending
nvme-pci: rerun irq setup on IO queue init errors
nvme-pci: use the same attributes when freeing host_mem_desc_bufs.
nvme-pci: fix the wrong setting of nr_maps
block: doc: add slice_idle_us to bfq documentation
block: clarify documentation for blk_{start|finish}_plug
...
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If a device provides an NQN it is expected to be globally unique.
Unfortunately some firmware revisions for Intel 760p/Pro 7600p devices did
not satisfy this requirement. In these circumstances if a system has >1
affected device then only one device is enabled. If this quirk is enabled
then the device supplied subnqn is ignored and we fallback to generating
one as if the field was empty. In this case we also suppress the version
check so we don't print a warning when the quirk is enabled.
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: James Dingwall <james@dingwall.me.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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There is an out of bounds array access in nvme_cqe_peding().
When enable irq_thread for nvme interrupt, there is racing between the
nvmeq->cq_head updating and reading.
nvmeq->cq_head is updated in nvme_update_cq_head(), if nvmeq->cq_head
equals nvmeq->q_depth and before its value set to zero, nvme_cqe_pending()
uses its value as an array index, the index will be out of bounds.
Signed-off-by: Hongbo Yao <yaohongbo@huawei.com>
[hch: slight coding style update]
Signed-off-by: Christoph Hellwig <hch@lst.de>
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If the driver is unable to create a subset of IO queues for any reason,
the read/write and polled queue sets will not match the actual allocated
hardware contexts. This leaves gaps in the CPU affinity mappings and
causes the following kernel panic after blk_mq_map_queue_type() returns
a NULL hctx.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000198
#PF error: [normal kernel read fault]
PGD 0 P4D 0
Oops: 0000 [#1] SMP
CPU: 64 PID: 1171 Comm: kworker/u259:1 Not tainted 4.20.0+ #241
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-2.fc27 04/01/2014
Workqueue: nvme-wq nvme_scan_work [nvme_core]
RIP: 0010:blk_mq_init_allocated_queue+0x2d9/0x440
RSP: 0018:ffffb1bf0abc3cd0 EFLAGS: 00010286
RAX: 000000000000001f RBX: ffff8ea744cf0718 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 000000000000007c RDI: ffffffff9109a820
RBP: ffff8ea7565f7008 R08: 000000000000001f R09: 000000000000003f
R10: ffffb1bf0abc3c00 R11: 0000000000000000 R12: 000000000001d008
R13: ffff8ea7565f7008 R14: 000000000000003f R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8ea757200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000198 CR3: 0000000013058000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
blk_mq_init_queue+0x35/0x60
nvme_validate_ns+0xc6/0x7c0 [nvme_core]
? nvme_identify_ctrl.isra.56+0x7e/0xc0 [nvme_core]
nvme_scan_work+0xc8/0x340 [nvme_core]
? __wake_up_common+0x6d/0x120
? try_to_wake_up+0x55/0x410
process_one_work+0x1e9/0x3d0
worker_thread+0x2d/0x3d0
? process_one_work+0x3d0/0x3d0
kthread+0x111/0x130
? kthread_park+0x90/0x90
ret_from_fork+0x1f/0x30
Modules linked in: nvme nvme_core serio_raw
CR2: 0000000000000198
Fix by re-running the interrupt vector setup from scratch using a reduced
count that may be successful until the created queues matches the irq
affinity plus polling queue sets.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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When using HMB the PCIe host driver allocates host_mem_desc_bufs using
dma_alloc_attrs() but frees them using dma_free_coherent(). Use the
correct dma_free_attrs() function to free the buffers.
Signed-off-by: Liviu Dudau <liviu@dudau.co.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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We only set the nr_maps to 3 if poll queues are supported.
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.
This change was generated with the following Coccinelle SmPL patch:
@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@
-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Export the disk name, queue id, sq_head, sq_tail to a trace event in
completion handling.
Usage example:
cd /sys/kernel/debug/tracing/events/nvme/nvme_sq
echo 'disk=="nvme1n1"' > filter
echo 1 > enable
cat /sys/kernel/debug/tracing/trace_pipe
Signed-off-by: yupeng <yupeng0921@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <keith.busch@intel.com>
[hch: slight formatting tweaks, use standard nvme tracepoint
conventions]
Signed-off-by: Christoph Hellwig <hch@lst.de>
wip
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By duplicating the nvme_process_cq in both branches we keep the
sparse lock context checking happy, so do it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
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The block layer now enables polling support on a queue if nr_maps
includes the poll map, so we should only set that if we actually
support poll queues.
Fixes: 6544d229bf ("block: enable polling by default if a poll map is initalized")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
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Now that the block layer checks if a queue map has any queues inside
it there is no more reason to duplicate the maps for the non-default
types.
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Guenter reported an boot hang issue on HPPA after we default to 0 poll
queues. We have two issues in the queue count calculations:
1) We don't separate the poll queues from the read/write queues. This is
important, since the former doesn't need interrupts.
2) The adjust logic is broken.
Adjust the poll queue count before doing nvme_calc_io_queues(). The poll
queue count is only limited by the IO queue count we were able to get
from the controller, not failures in the IRQ allocation loop. This
leaves nvme_calc_io_queues() just adjusting the read/write queue map.
Reported-by: Reported-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This avoids having to have differnet mq_ops for different setups
with or without poll queues.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Now that we can't poll regular, interrupt driven I/O queues there
is almost nothing that can race with an interrupt. The only
possible other contexts polling a CQ are the error handler and
queue shutdown, and both are so far off in the slow path that
we can simply use the big hammer of disabling interrupts.
With that we can stop taking the cq_lock for normal queues.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This is the last place outside of nvme_irq that handles CQEs from
interrupt context, and thus is in the way of removing the cq_lock for
normal queues, and avoiding lockdep warnings on the poll queues, for
which we already take it without IRQ disabling.
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pass the opcode for the delete SQ/CQ command as an argument instead of
the somewhat confusing pass loop.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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We have three places that can poll for I/O completions on a normal
interrupt-enabled queue. All of them are in slow path code, so
consolidate them to a single helper that uses spin_lock_irqsave and
removes the fast path cqe_pending check.
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This will allow us to simplify both the regular NVMe interrupt handler
and the upcoming aio poll code. In addition to that the separate
queues are generally a good idea for performance reasons.
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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