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git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux
Pull mod_devicetable.h header split from Uwe Kleine-König:
"Split <linux/mod_devicetable.h> in per subsystem headers
<linux/mod_devicetable.h> is included transitively in nearly every
driver in an x86_64 allmodconfig build of v7.1:
$ find drivers -name \*.o -not -name \*.mod.o | wc -l
21330
$ find drivers -name \*.o.cmd -not -name \*.mod.o.cmd | xargs grep -l mod_devicetable.h | wc -l
17038
The result of this mixture of different and unrelated subsystem
details is that even when touching an obscure device id struct most of
the kernel needs to be recompiled. Given that each driver typically
only needs one or two of these structures, splitting into per
subsystem headers and only including what is really needed reduces the
amount of needed recompilation.
This split is implemented in the first commit and then after some
preparatory work in the following commits, the last two replace
includes of <linux/mod_devicetable.h> by the actually needed more
specific headers.
There are still a few instances left, but the ones with high impact
(that is in headers that are used a lot) and the easy ones (.c files)
are handled. These remaining includes will be addressed during the
next merge window"
* tag 'device-id-rework' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux:
Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)
Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (headers)
parisc: #include <linux/compiler.h> for unlikely() in <asm/ptrace.h>
media: em28xx: Add include for struct usb_device_id
LoongArch: KVM: Add include defining struct cpu_feature
ALSA: hda/core: Add include defining struct hda_device_id
usb: dwc2: Add include defining struct pci_device_id
platform/x86: int3472: Add include defining struct dmi_system_id
platform/x86: x86-android-tablets: Add include defining struct dmi_system_id
i2c: Let i2c-core.h include <linux/i2c.h>
of: Explicitly include <linux/types.h> and <linux/err.h>
platform/x86: msi-ec: Ensure dmi_system_id is defined
usb: serial: Include <linux/usb.h> in <linux/usb/serial.h>
driver core: platform: Include header for struct platform_device_id
driver: core: Include headers for acpi_device_id and of_device_id for struct device_driver
media: ti: vpe: #include <linux/platform_device.h> explicitly
mod_devicetable.h: Split into per subsystem headers
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files)
Replace the #include of <linux/mod_devicetable.h> by the more specific
<linux/device-id/*.h> where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.
Acked-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
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The function ata_scsi_rbuf_fill() is used to copy the response of
emulated SCSI commands from ata_scsi_rbuf to the SCSI command's
scatterlist.
Currently, sg_copy_from_buffer() is called with the size argument
set to ATA_SCSI_RBUF_SIZE (2048 bytes). Since ata_scsi_rbuf is
zeroed out before the simulation actor is invoked, copying the
full buffer size causes the remainder of the SCSI command's
transfer buffer (beyond the actual response length 'len') to be
overwritten with zeroes. This clobbers any pre-existing sentinel
values or data in the caller's buffer tail, even though the
correct residual count is reported via scsi_set_resid().
Fix this by passing the actual response length 'len' as the copy
size to sg_copy_from_buffer(), ensuring that the tail of the
caller's buffer remains untouched. Also, add a defensive check
to ensure that the actor does not return a length exceeding the
static buffer capacity. If this occurs, trigger a WARN_ON(),
fail the command with an aborted command error, and return
immediately without copying any data.
The fix was tested by invoking an SCSI SG_IO INQUIRY on
an ATA disk on vanilla build, and build with the fix. Confirmed
that the input buffer's tail end remains unmodified with the fix.
Fixes: 5251ae224d8d ("ata: libata-scsi: Return residual for emulated SCSI commands")
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Karuna Ramkumar <rkaruna@google.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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When dmaengine_slave_config() fails, the DMA channel acquired by
dma_request_chan() is not released before returning the error,
leaking the channel reference.
Fix by adding dma_release_channel() in the error path.
The ata_host_activate() error path already correctly releases the
DMA channel.
Cc: stable@vger.kernel.org
Fixes: 88622d80af82 ("ata: pata_pxa: dmaengine conversion")
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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gemini_sata_bridge_init() prepares and enables both SATA PCLKs, then
disables them again while keeping the clocks prepared for later bridge
start and stop operations. If gemini_setup_ide_pins() fails after that,
gemini_sata_probe() returns directly and skips the existing
out_unprep_clk unwind path.
Route the IDE pinctrl failure through out_unprep_clk so the clocks
prepared by gemini_sata_bridge_init() are unprepared before probe
fails.
Fixes: d872ced29d5f ("ata: sata_gemini: Introduce explicit IDE pin control")
Co-developed-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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ata_dev_config_cpr() takes the number of range descriptors from buf[0]
of the concurrent positioning ranges log (up to 255), which the device
reports independently of the log size in the GPL directory. The count is
then walked at a fixed 32-byte stride in two places with no bound: the
log read here, and the INQUIRY VPD page B9h emitter, which writes one
descriptor per range into the fixed 2048-byte ata_scsi_rbuf. A device
reporting a count larger than its own log overflows the read buffer (up
to 7704 bytes past a 512-byte slab), and a count above 62 overflows the
response buffer on the emit side.
Bound the count once, on probe, against both the log the device returned
and the number of descriptors the VPD B9h response buffer can hold
(ATA_DEV_MAX_CPR, derived from the rbuf size). Reject an out-of-range
count with a warning; this keeps the emitter in bounds with no separate
change there.
Suggested-by: Damien Le Moal <dlemoal@kernel.org>
Fixes: fe22e1c2f705 ("libata: support concurrent positioning ranges log")
Fixes: c745dfc541e7 ("libata: fix reading concurrent positioning ranges log")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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The PNY CS900 1TB SSD (Phison PS3111-S11, DRAM-less) drops off the bus
after entering Device-Initiated Slumber during idle. With the default
med_power_with_dipm policy the link goes down (SStatus 1 SControl 300)
and does not recover, forcing the filesystem read-only. Forcing
max_performance keeps the link stable across prolonged idle.
Add a NOLPM quirk so link power management is disabled for this drive
specifically, leaving it intact for other devices on the host.
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux
Pull ata updates from Niklas Cassel:
- Bump required Clang version to 23 (Marco), and add Clang context
analysis annotations (Bart)
- Use the ahci_nr_ports() helper in libahci (me)
- Fail to probe the ahci driver if the BAR size is smaller than the
required size to support CAP.NP (Number of Ports) (liyouhong)
- Move EXPORT_SYMBOL_GPL(ahci_do_softreset) to be just below the
function definition (Bart)
- Make ata_scsi_scan_host() schedule hotplug work on the
system_dfl_long_wq workqueue so that it can benefit from scheduler
task placement (Marco)
- Make ata_scsi_port_error_handler() schedule hotplug work on the
system_dfl_long_wq workqueue, such that the work always uses the same
workqueue (me)
- Use devm_platform_get_and_ioremap_resource() in pata_arasan_cf driver
(Rosen)
- Fix ata_exec_internal() to only release and acquire the EH mutex if
the calling function is the one holding the EH mutex (Bart)
- Use hweight_long() to count the port_map bits (TanZheng)
- Add COMPILE_TEST support for pata_ep93xx driver (Rosen)
- Drop unused assignments from pata_isapnp driver (Uwe)
- Extend existing JMicron PMP quirk to include JMicron JMS562 (Xu)
- Drop unused assignments of pci_device_id driver data (Uwe)
- Use named initializers for pci_device_id arrays (Uwe)
* tag 'ata-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
ata: Use named initializers for pci_device_id arrays
ata: Drop unused assignments of pci_device_id driver data
ata: libata-pmp: add JMicron JMS562 quirk
ata: pata_isapnp: Drop unused assignments from pnp_device_id array
ata: pata_ep93xx: add COMPILE_TEST support
ata: pata_ep93xx: use unsigned long for data
ata: pata_ep93xx: avoid asm on non ARM
ata: Annotate functions in the issuing path with __must_hold()
ata: libata: Pass ap parameter directly to functions in the issuing path
ata: libata: Document when host->eh_mutex should be held
ata: libata: Add an argument to ata_eh_reset()
ata: ahci: use hweight_long() to count port_map bits
ata: libata: Fix ata_exec_internal()
ata: pata_arasan_cf: simplify ioremap
ata: libata-eh: queue hotplug work on the system_dfl_long_wq workqueue
ata: libata-scsi: Move long delayed work on system_dfl_long_wq
ata: ahci: Move EXPORT_SYMBOL_GPL(ahci_do_softreset)
ata: ahci: fail probe if BAR too small for claimed ports
ata: libahci: use ahci_nr_ports() helper
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann:
"There are a few added drivers, but mostly the normal maintenance to
drivers for firmware, memory controller and other soc specific
hardware:
- The NXP QuickEngine gets modern MSI support, which allows some
cleanups to the GICv3 irqchip chip driver
- A new SoC specific driver for the Renesas R-Car MFIS unit is added,
encapsulating support for the on-chip mailbox and hwspinlock
implementations that are not easily separated into individual
drivers
- The Qualcomm SoC drivers add support for additional SoC
implementations, and flexibility around power management for the
serial-engine driver as well as probing the LLCC driver using
custom hardware descriptions inside of the device itself.
- Added support for the Samsung thermal management unit
- A cleanup to the Tegra 'PMC' driver interfaces to remove legacy
APIs and allow multiple PMC instances everywhere.
- Updates to the TI SCI and KNAS drivers to improve suspend/resume
support.
- Minor driver changes for mediatek, xilinx, allwinner, aspeed,
tegra, broadcom, amd, microchip and starfive specific drivers
- Memory controller updates for Tegra and Renesas for additional SoC
types and other improvements.
- Firmware driver updates for Arm FF-A, SMCCC and SCMI interfaces, to
update driver probing, object lifetimes and address minor bugs"
* tag 'soc-drivers-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (189 commits)
Revert "firmware: zynqmp: Add dynamic CSU register discovery and sysfs interface"
Revert "Documentation: ABI: add sysfs interface for ZynqMP CSU registers"
memory: tegra234: drop dead NULL check in tegra234_mc_icc_aggregate()
memory: tegra264: drop redundant tegra264_mc_icc_aggregate()
memory: tegra186-emc: stop borrowing MC aggregate hook for EMC
soc: aspeed: cleanup dead default for ASPEED_SOCINFO
firmware: tegra: bpmp: Add support for multi-socket platforms
firmware: tegra: bpmp: Propagate debugfs errors
soc/tegra: pmc: Add Tegra238 support
soc/tegra: pmc: Restrict power-off handler to Nexus 7
soc/tegra: pmc: Populate powergate debugfs only when needed
soc/tegra: pmc: Move legacy code behind CONFIG_ARM guard
soc/tegra: pmc: Remove unused legacy functions
soc/tegra: pmc: Create PMC context dynamically
firmware: samsung: acpm: remove compile-testing stubs
firmware: samsung: acpm: Add devm_acpm_get_by_phandle helper
firmware: samsung: acpm: Add TMU protocol support
firmware: samsung: acpm: Make acpm_ops const and access via pointer
firmware: samsung: acpm: Drop redundant _ops suffix in acpm_ops members
firmware: samsung: acpm: Annotate rx_data->cmd with __counted_by_ptr
...
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While being less compact, using named initializers allows to more easily
see which members of the structs are assigned which value without having
to lookup the declaration of the struct. And it's also more robust
against changes to the struct definition.
The mentioned robustness is relevant for a planned change to struct
pci_device_id that replaces .driver_data by an anonymous union.
Also drop the comma after a few list terminators.
This patch doesn't modify the compiled array, only their representation
in source form benefits. The former was confirmed with x86 and arm64
builds.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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The drivers explicitly set the .driver_data member of struct
pci_device_id to zero without relying on that value. Drop these unused
assignments.
While touching these arrays, convert the one driver not using PCI_DEVICE
to use that macro and align the array's coding style to what is used
most for these. (i.e. break very long lines, a single space in the list
terminator and no trailing comma.)
This patch doesn't modify the compiled array, only its representation in
source form benefits. The former was confirmed with builds on x86 and
arm64.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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JMicron JMS562, as used in QNAP QDA-A2AR RAID1 adapters, may
keep the exported ATA device not ready while the array is rebuilding.
In this state, libata may repeatedly try to softreset and classify
the fan-out link. On the affected adapter, this can time out, make
PMP/SCR access fail, and eventually disable the fan-out link before
the RAID volume is exported.
A failing boot shows the fan-out link failing SRST, PMP access
timing out, SCR read failing, and the link being disabled:
ata4.00: softreset failed (device not ready)
ata4.15: qc timeout after 3000 msecs (cmd 0xe4)
ata4.00: failed to read SCR 0 (Emask=0x4)
ata4.00: failed to recover link after 3 tries, disabling
After that, the root filesystem on the exported RAID volume cannot
be found.
Add JMS562 to the existing JMicron PMP quirk that disables LPM,
avoids softreset on fan-out links, and assumes an ATA device. This
prevents libata from dropping the exported RAID volume during rebuild
recovery.
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Explicitly assigning .driver_data in drivers that don't use this member
is silly and a bit irritating. Drop it. Also simplify the list
terminator entry to be just empty to match what most other device_id
tables do.
There is no changed semantic, not even a change in the compiled result.
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into soc/drivers
soc/tegra: pmc: Changes for v7.2-rc1
The bulk of these changes converts existing users to the modern variants
of the API that take a PMC instance as argument. This completes the
transition to multi-instance support, which then makes room for cleanups
and restricting the remaining legacy APIs to 32-bit platforms.
Some changes in this set also clean up powergate debugfs and restrict
the power-off handler to be installed only where appropriate. Lastly,
support for Tegra238 is added.
* tag 'tegra-for-7.2-pmc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
soc/tegra: pmc: Add Tegra238 support
soc/tegra: pmc: Restrict power-off handler to Nexus 7
soc/tegra: pmc: Populate powergate debugfs only when needed
soc/tegra: pmc: Move legacy code behind CONFIG_ARM guard
soc/tegra: pmc: Remove unused legacy functions
soc/tegra: pmc: Create PMC context dynamically
usb: xhci: tegra: Explicitly specify PMC instance to use
PCI: tegra: Explicitly specify PMC instance to use
media: vde: Explicitly specify PMC instance to use
drm/tegra: Explicitly specify PMC instance to use
drm/nouveau: tegra: Explicitly specify PMC instance to use
ata: ahci_tegra: Explicitly specify PMC instance to use
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Now that the build failures have been fixed, we can add COMPILE_TEST so
the buildbots can find potentially more problems.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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An int is being encoded as a void pointer but that breaks on 64-bit
systems as the type needs to match pointer size.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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The raw ARM asm delay loop prevents COMPILE_TEST builds on
non-ARM architectures. Guard it with CONFIG_ARM and provide a
cpu_relax() fallback for compilation on other architectures.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Annotate the following functions used in the issuing path:
ata_qc_issue(), ata_sas_queuecmd(), ata_scsi_qc_issue(),
ata_scsi_translate(), __ata_scsi_queuecmd()
These functions are all used in the issuing path, so context analysis will
be able to verify that the ap lock is held, from it is taken in
sas_queuecommand() or ata_scsi_queuecmd() all the way down to
ata_qc_issue().
Commenting out the spin_lock_irqsave() successfully results in a compiler
error on Clang 23.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Co-developed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Context analysis cannot recognize that qc->ap == ap.
Therefore, grow a struct ata_port parameter to the following functions:
ata_qc_issue(), __ata_scsi_queuecmd(), and ata_scsi_translate()
such that we will be able to enable context analysis in a follow-up commit.
No functionality has been changed.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Annotate the following functions with __must_hold(&host->eh_mutex):
* All ata_port_operations.error_handler() implementations.
* ata_eh_reset() and ata_eh_recover() because these functions call
ata_eh_release() and ata_eh_acquire().
* All callers of ata_eh_reset() and ata_eh_recover().
Enable Clang's context analysis. This will cause the build to fail if
e.g. a locking bug would be introduced in an error path. This patch
should not affect the generated assembler code.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
[cassel: drop note about clang 23 from commit log]
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Pass the ATA port pointer as first argument to ata_eh_reset(). No
functionality has been changed. This patch prepares for enabling lock
context analysis. Without this patch, lockdep_assert_held() statements
would have to be added before each ata_eh_reset() call because the
compiler doesn't know that ap->link.p == ap. See also ata_link_init().
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Replace the open loop used to calculate the number of set bits
in the port mapping with the `hweight_long()` function, which
simplifies the code without altering its functionality.
Signed-off-by: TanZheng <tanzheng@kylinos.cn>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Some but not all ata_exec_internal() calls happen from the context of
the ATA error handler. Commit c0c362b60e25 ("libata: implement cross-port
EH exclusion") added ata_eh_release() and ata_eh_acquire() calls in
ata_exec_internal(). Calling these functions is necessary if the caller
holds the eh_mutex but is not allowed if the caller doesn't hold that
mutex. Fix this by only calling ata_eh_release() and ata_eh_acquire() if
the caller holds the eh_mutex. An example of an indirect caller of
ata_exec_internal() that does not hold the eh_mutex is
ata_host_register().
Fixes: c0c362b60e25 ("libata: implement cross-port EH exclusion")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Use devm_platform_get_and_ioremap_resource() to combine
platform_get_resource, request_mem_region, and ioremap.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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ata_scsi_port_error_handler() uses schedule_delayed_work() to queue
the ap->hotplug_task work.
schedule_delayed_work() always uses the system_percpu_wq per-cpu
workqueue.
ata_scsi_scan_host() queues the ap->hotplug_task work on the unbound
system_dfl_long_wq workqueue.
It seems counter-intuitive to queue the same work on two different
workqueues. Thus, change ata_scsi_port_error_handler() to also queue
the ap->hotplug_task work on the system_dfl_long_wq workqueue, such
that the work is always queued on the same workqueue.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Currently the code enqueue work items using {queue|mod}_delayed_work(),
using system_long_wq. This workqueue should be used when long works are
expected, but it is a per-cpu workqueue.
This is important because queue_delayed_work() queue the work using:
queue_delayed_work_on(WORK_CPU_UNBOUND, ...);
Note that WORK_CPU_UNBOUND = NR_CPUS.
This would end up calling __queue_delayed_work() that does:
if (housekeeping_enabled(HK_TYPE_TIMER)) {
// [....]
} else {
if (likely(cpu == WORK_CPU_UNBOUND))
add_timer_global(timer);
else
add_timer_on(timer, cpu);
}
So when cpu == WORK_CPU_UNBOUND the timer is global and is
not using a specific CPU. Later, when __queue_work() is called:
if (req_cpu == WORK_CPU_UNBOUND) {
if (wq->flags & WQ_UNBOUND)
cpu = wq_select_unbound_cpu(raw_smp_processor_id());
else
cpu = raw_smp_processor_id();
}
Because the wq is not unbound, it takes the CPU where the timer
fired and enqueue the work on that CPU.
The consequence of all of this is that the work can run anywhere,
depending on where the timer fired.
Recently, a new unbound workqueue specific for long running work has
been added:
c116737e972e ("workqueue: Add system_dfl_long_wq for long unbound works")
So change system_long_wq with system_dfl_long_wq so that the work may
benefit from scheduler task placement.
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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From Documentation/process/coding-style.rst:
In source files, separate functions with one blank line. If the function
is exported, the **EXPORT** macro for it should follow immediately after
the closing function brace line.
Hence, move EXPORT_SYMBOL_GPL(ahci_do_softreset) to just below the
definition of the ahci_do_softreset() function.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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When an AHCI controller is disabled in BIOS, its HOST_CAP register may
contain a bogus value, e.g. 0xFFFFFFFF.
Since CAP.NP (Number of Ports) is a zeroes based 5-bit register field,
a value of 0x1f means 32 ports. If CAP.NP claims more ports than can
physically fit within the mapped BAR region, accessing port registers
beyond the BAR boundary causes a kernel panic.
Add validation in ahci_init_one() to check that the BAR size is
sufficient for the number of ports claimed in CAP.NP. The check
calculates the required MMIO size as:
required_size = 0x100 (global registers) + max_ports * 0x80
If required_size exceeds the actual BAR size, the probe fails with
-ENODEV, preventing the panic and providing a clear error message.
Reported-by: liyouhong <liyouhong@kylinos.cn>
Closes: https://lore.kernel.org/all/20260422080322.1006592-1-dayou5941@163.com/
Suggested-by: Damien Le Moal <dlemoal@kernel.org>
Suggested-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: liyouhong <liyouhong@kylinos.cn>
[cassel: commit log]
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Use ahci_nr_ports() helper instead of open coding the same.
No functional change.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Currently the kernel relies on a global variable to reference the PMC
context. Use an explicit lookup for the PMC and pass that to the public
PMC APIs.
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The ACS specification does not allow a non-NCQ command to be issued while
an NCQ command is outstanding.
Commit 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
introduced a feature where a deferred non-NCQ command gets issued from a
workqueue. The design stores a single non-NCQ command per port.
However, when using Port Multipliers (PMPs), specifically PMPs that
support FIS-Based Switching (FBS), non-NCQ and NCQ commands can be mixed
on the same port, just not for the same link, see e.g. ata_std_qc_defer()
which is, and always has operated on a per-link basis.
Therefore, move the deferred_qc from struct ata_port to struct ata_link.
This way, when using a PMP with FBS, we will not needlessly defer commands
to all other links, just because one link issued a non-NCQ command while
having an NCQ command outstanding. Only commands for that specific link
will be deferred. This is in line with how PMPs with FBS worked before
commit 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation").
Fixes: 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
Tested-by: Tommy Kelly <linux@tkel.ly>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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When using Port Multipliers (PMPs) with Command-Based Switching (CBS), you
can only issue commands to one link at a time. For PMPs with CBS, there is
already code to handle commands being sent to different links in
sata_pmp_qc_defer_cmd_switch() using ap->excl_link. sata_sil24 also makes
use of ap->excl_link.
A user on the list reported that commit 0ea84089dbf6 ("ata: libata-scsi:
avoid Non-NCQ command starvation") broke PMPs with CBS. The commit
introduced code that stores a deferred qc in ap->deferred_qc, to later be
issued via a workqueue. It turns out that this change is incompatible with
the existing ap->excl_link handling used by PMPs with CBS.
Thus, modify sata_pmp_qc_defer_cmd_switch() and sil24_qc_defer() to return
ATA_DEFER_LINK_EXCL, and make sure that the deferred QC handling via
workqueue is not used for this return value.
This way, PMPs with CBS will work once again. Note that the starvation
referenced in commit 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ
command starvation") can only happen on libsas ports, and libsas does not
support Port Multipliers, thus there is no harm of reverting back to the
previous way of deferring commands for PMPs with CBS.
Non-libsas ports connected to anything but a PMP with CBS (e.g. a normal
drive or a PMP with FBS) will continue using the deferred workqueue, since
it does result in lower completion latencies for non-NCQ commands, even
though the workqueue is not strictly needed to avoid starvation for
non-libsas ports.
If we want to modify the scope of the workqueue issuing to also handle
PMPs with CBS, then we should ensure that we can save both NCQ and non-NCQ
commands in ap->deferred_qc, while also removing the existing PMP CBS
handling using ap->excl_link, such that we don't duplicate features.
While at it, also add a comment explaining how the ap->excl_link mechanism
works.
Fixes: 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
Tested-by: Tommy Kelly <linux@tkel.ly>
Reported-by: Tommy Kelly <linux@tkel.ly>
Closes: https://lore.kernel.org/linux-ide/ce09cc21-a8e9-4845-b205-35411e22fba9@tkel.ly/
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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The deferred QC feature was meant to handle mixed NCQ and non-NCQ commands,
i.e. for return value ATA_DEFER_LINK.
ATA_DEFER_PORT is returned by PATA drivers, but also certain SATA drivers
like sata_mv and sata_sil24 that uses ap->excl_link to workaround hardware
bugs in these HBAs. Regardless of the reason, using the deferred QC feature
for ATA_DEFER_PORT is always wrong, and will break the ap->excl_link usage
of the SATA drivers that rely on that feature.
Modify ata_scsi_qc_issue() to only use the deferred QC feature when mixing
NCQ and non-NCQ commands, i.e. ATA_DEFER_LINK.
Fixes: 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
Tested-by: Tommy Kelly <linux@tkel.ly>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Improve readability of ata_scsi_qc_issue().
No functional changes.
Tested-by: Tommy Kelly <linux@tkel.ly>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Driver core expects devices to be dynamically allocated and will, for
example, complain loudly when no release function has been provided.
Use root_device_register() to allocate and register the root device
instead of open coding using a static device.
Note that this also fixes a reference leak in the unlikely event that
device_register() ever fails.
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux
Pull ata updates from Niklas Cassel:
- Misc code cleanups related to tag checking and tag command completion
(Damien)
- Remove Baikal bt1-ahci DT binding since the upstreaming for this SoC
is not going to be finalized (Andy)
- Only call the libata port error handler from the SCSI error handler
if there were command timeouts or if EH was scheduled for the port
(Damien)
- Refactor ata_scsiop_maint_in() to more clearly show that there is
only one service action implemented for the MAINTENANCE IN command
(me)
- Clean up the handling of sysfs attributes exposed by libata (Heiner)
- Let libahci_platform use a flexible array member for platform PHYs to
avoid multiple allocations (Rosen)
- Do not retry reset if the device has been removed/hot-unplugged
(Igor)
- Add missing newlines to error prints in pata_arasan_cf driver (Haoyu)
- Use the correct SCSI host byte when completing deferred ATA
PASS-THROUGH commands, to avoid the SCSI mid-layer from failing the
commands instead of requeuing (Igor)
* tag 'ata-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
ata: libata-scsi: fix requeue of deferred ATA PASS-THROUGH commands
ata: pata_arasan_cf: fix missing newline in dev_err() messages
ata: libata-transport: remove static variable ata_scsi_transport_template
ata: libata-transport: split struct ata_internal
ata: libata-transport: use static struct ata_transport_internal to simplify match functions
ata: libata-transport: inline ata_attach|release_transport
ata: libata-transport: instantiate struct ata_internal statically
ata: libata-eh: Do not retry reset if the device is gone
ata: libahci_platform: use flex array for platform PHYs
ata: libata-transport: remove redundant dynamic sysfs attributes
ata: libata-scsi: refactor ata_scsiop_maint_in()
ata: libata-eh: avoid unnecessary calls to ata_scsi_port_error_handler()
ata: ahci-dwc: Remove not-going-to-be-supported code for Baikal SoC
ata: libata-scsi: rename and improve ata_qc_done()
ata: libata-scsi: make ata_scsi_simulate() static
ata: libata-scsi: simplify ata_scsi_requeue_deferred_qc()
ata: libata-sata: simplify ata_sas_queuecmd()
ata: libata-core: improve tag checks in ata_qc_issue()
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Commit 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
introduced ata_scsi_requeue_deferred_qc() to handle commands deferred
during resets or NCQ failures. This deferral logic completed commands
with DID_SOFT_ERROR to trigger a retry in the SCSI mid-layer.
However, DID_SOFT_ERROR is subject to scsi_cmd_retry_allowed() checks.
ATA PASS-THROUGH commands sent via SG_IO ioctl have scmd->allowed set
to zero. This causes the mid-layer to fail the command immediately
instead of retrying, even though the command was never actually issued
to the hardware.
Switch to DID_REQUEUE to ensure these commands are inserted back into
the request queue regardless of retry limits.
Fixes: 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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The JMicron JMB585 (and JMB582) SATA controllers advertise 64-bit DMA
support via the S64A bit in the AHCI CAP register, but their 64-bit DMA
implementation is defective. Under sustained I/O, DMA transfers targeting
addresses above 4GB silently corrupt data -- writes land at incorrect
memory addresses with no errors logged.
The failure pattern is similar to the ASMedia ASM1061
(commit 20730e9b2778 ("ahci: add 43-bit DMA address quirk for ASMedia
ASM1061 controllers")), which also falsely advertised full 64-bit DMA
support. However, the JMB585 requires a stricter 32-bit DMA mask rather
than 43-bit, as corruption occurs with any address above 4GB.
On the Minisforum N5 Pro specifically, the combination of the JMB585's
broken 64-bit DMA with the AMD Family 1Ah (Strix Point) IOMMU causes
silent data corruption that is only detectable via checksumming
filesystems (BTRFS/ZFS scrub). The corruption occurs when 32-bit IOVA
space is exhausted and the kernel transparently switches to 64-bit DMA
addresses.
Add device-specific PCI ID entries for the JMB582 (0x0582) and JMB585
(0x0585) before the generic JMicron class match, using a new board type
that combines AHCI_HFLAG_IGN_IRQ_IF_ERR (preserving existing behavior)
with AHCI_HFLAG_32BIT_ONLY to force 32-bit DMA masks.
Signed-off-by: Arthur Husband <artmoty@gmail.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Add missing trailing newlines to dev_err() messages in pata_arasan_cf.c.
This keeps the error output as properly terminated log lines.
Acked-by: Viresh Kumar <vireshk@kernel.org>
Signed-off-by: Haoyu Lu <hechushiguitu666@gmail.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Simplify the code by making struct ata_scsi_transportt public, instead
of using separate variable ata_scsi_transport_template.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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There's no need for an umbrella struct, so remove it. It's also a
prerequisite for making the embedded struct scsi_transport_template
public.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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match functions
Both matching functions can make use of static struct
ata_transport_internal. This eliminates the dependency on static
variable ata_scsi_transport_template, and it allows to remove helper
to_ata_internal(). Small drawback is that a forward declaration of
both functions is needed.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Both functions are helpers which are used only once. So remove them and
merge their code into libata_transport_init() and libata_transport_exit()
respectively.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Struct ata_internal is only instantiated once, in module init code.
So we can also instantiate it statically, which allows simplifying
the code.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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If a device is hot-unplugged or otherwise disappears during error handling,
ata_eh_reset() may fail with -ENODEV. Currently, the error handler will
continue to retry the reset operation up to max_tries times.
Prevent unnecessary reset retries by exiting the loop early when
ata_do_reset() returns -ENODEV.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Modify struct ahci_host_priv to use a flexible array member for an adapter
port PHYs and use struct_size to combine the allocation of this array
together with the adapter private data structure. __counted_by() annotation
is added for the phys field to support runtime analysis.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Use the static sysfs attributes directly, this allows to significantly
simplify the code. See attribute_container_add_attrs() for why member
grp can be used instead of attrs.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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ata_scsiop_maint_in() is currently quite confusing to read, because it
currently only implements support for the service action REPORT SUPPORTED
OPERATION CODES.
Thus, when this function is checking for "invalid command format", it is
not very clear if it is an invalid command format for the MAINTENANCE IN
command itself, or an invalid command format for the (currently one and
only) service action/subcommand implemented for this command.
Move the service action to a separate function, so it is more clear that
the "invalid command format" check is actually specific for the REPORT
SUPPORTED OPERATION CODES service action.
This also makes it easier and less confusing to add support for additional
service actions in the future.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Commit 4ab7bb976343 ("ata: libata-scsi: Refactor ata_scsiop_maint_in()")
modified ata_scsiop_maint_in() to directly call
ata_scsi_set_invalid_field() to set the field pointer of the sense data
of a failed MAINTENANCE IN command. However, in the case of an invalid
command format, the sense data field incorrectly indicates byte 1 of
the CDB. Fix this to indicate byte 2 of the command.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: 4ab7bb976343 ("ata: libata-scsi: Refactor ata_scsiop_maint_in()")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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