| Commit message (Collapse) | Author | Age | Files | Lines |
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The ncq_sense_buf buffer field of struct ata_port is allocated and used
only for devices that support the Command Duration Limits (CDL) feature.
However, the cdl buffer of struct ata_device, which is used to cache the
command duration limits log page for devices supporting CDL is always
allocated as part of struct ata_device, which is wasteful of memory for
devices that do not support this feature.
Clean this up by defining both buffers as part of the new ata_cdl
structure and allocating this structure only for devices that support
the CDL feature. This new structure is attached to struct ata_device
using the cdl pointer.
The functions ata_dev_init_cdl_resources() and
ata_dev_cleanup_cdl_resources() are defined to manage this new structure
allocation, initialization and freeing when a port is removed or a
device disabled. ata_dev_init_cdl_resources() is called from
ata_dev_config_cdl() only for devices that support CDL.
ata_dev_cleanup_cdl_resources() is called from ata_dev_free_resources()
to free the ata_cdl structure when a device is being disabled by EH.
Note that the name of the former cdl log buffer of struct ata_device is
changed to desc_log_buf to make it clearer that it is a buffer for the
limit descriptors log page.
This change reduces the size of struct ata_device, thus reducing memory
usage for ATA devices that do not support the CDL feature.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
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The 512B buffer sector_buf field of struct ata_port is used for scanning
devices as well as during error recovery with ata EH. This buffer is
thus useless if a port does not have a device connected to it.
And also given that commands using this buffer are issued to devices,
and not to ports, move this buffer definition from struct ata_port to
struct ata_device.
This change slightly increases system memory usage for systems using a
port-multiplier as in that case we do not need a per-device buffer for
scanning devices (PMP does not allow parallel scanning) nor for EH (as
when entering EH we are guaranteed that all commands to all devices
connected to the PMP have completed or have been aborted). However,
this change reduces memory usage on systems that have many ports with
only few devices rives connected, which is a much more common use case
than the PMP use case.
Suggested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
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The function ata_eh_read_sense_success_ncq_log() does more that just
reading the sense data for successful NCQ commands log page as it also
sets the sense data for all commands listed in the log page.
Rename this function to ata_eh_get_ncq_success_sense() to better
describe what the function does. Furthermore, since this function is
only called from ata_eh_get_success_sense() in libata-eh.c, there is no
need to export it and its declaration can be moved to
drivers/ata/libata.h.
To be consistent with this change, the function
ata_eh_read_sense_success_non_ncq() is also renamed to
ata_eh_get_non_ncq_success_sense().
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
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Unlike ata_std_prereset() and ata_std_postreset(), the function
sata_std_hardreset() applies only to SATA devices, as its name implies.
So move its definition to libata-sata.c.
Together with this, also move the definition of sata_port_ops to
libata-sata.c, where it belongs.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
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The function ata_schedule_scsi_eh() was removed with commit
f8bbfc247efb ("[PATCH] SCSI: make scsi_implement_eh() generic API for
SCSI transports"), and the function ata_sff_irq_clear() was removed
with commit 37f65b8bc262("libata-sff: ata_sff_irq_clear() is BMDMA
specific").
Remove the now useless declarations of these functions in
drivers/ata/libata.h and include/linux/libata.h.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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In ata_dev_print_quirks(), return early if ata_dev_print_info() returns
false or if we already printed quirk information. This is to avoid
printing a device quirks multiple times (that is, each time
ata_dev_revalidate() is called).
To remember if ata_dev_print_quirks() was already executed, define the
EH context flag ATA_EHI_DID_PRINT_QUIRKS and set this flag in
ata_dev_print_quirks().
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: 58157d607aec ("ata: libata: Print quirks applied to devices")
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
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The function ata_noop_qc_prep(), as its name implies, does nothing and
simply returns AC_ERR_OK. For drivers that do not need any special
preparations of queued commands, we can avoid having to define struct
ata_port qc_prep operation by simply testing if that operation is
defined or not in ata_qc_issue(). Make this change and remove
ata_noop_qc_prep().
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
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Introduce the function ata_dev_print_quirks() to print the quirk flags
that will be applied to a scanned device. This new function is called
from ata_dev_quirks() when a match on a device model or device model
and revision is found for a device in the __ata_dev_quirks array.
To implement this function, the ATA_QUIRK_ flags are redefined using
the new enum ata_quirk which defines the bit shift for each quirk
flag. The array of strings ata_quirk_names is used to define the name
of each flag, which are printed by ata_dev_print_quirks().
Example output for a device listed in the __ata_dev_quirks array and
which has the ATA_QUIRK_DISABLE flag applied:
[10193.461270] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[10193.469190] ata1.00: Model 'ASMT109x- Config', rev '2143 5', applying quirks: disable
[10193.469195] ata1.00: unsupported device, disabling
[10193.481564] ata1.00: disable device
enum ata_quirk also defines the __ATA_QUIRK_MAX value as one plus the
last quirk flag defined. This value is used in ata_dev_quirks() to add a
build time check that all quirk flags fit within the unsigned int
(32-bits) quirks field of struct ata_device.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
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According to Wiktionary, the verb "hork" is computing slang defined as
"To foul up; to be occupied with difficulty, tangle, or unpleasantness;
to be broken" (https://en.wiktionary.org/wiki/hork#Verb). libata uses
this with the term "horkage" to refer to broken device features. Given
that this term is not widely used and its meaning unknown to many,
rename it to the more commonly used term "quirk", similar to many other
places in the kernel.
The renaming done is:
1) Rename all ATA_HORKAGE_XXX flags to ATA_QUIRK_XXX
2) Rename struct ata_device horkage field to quirks
3) Rename struct ata_blacklist_entry to struct ata_dev_quirks_entry. The
array of these structures defining quirks for known devices is
renamed __ata_dev_quirks.
4) The functions ata_dev_blacklisted() and ata_force_horkage() are
renamed to ata_dev_quirks() and ata_force_quirks() respectively.
5) All the force_horkage_xxx() macros are renamed to force_quirk_xxx()
And while at it, make sure that the type "unsigned int" is used
consistantly for quirk flags variables and data structure fields.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
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The ata_sas_port_alloc() wrapper mainly exists in order to export the
internal libata function which it wraps. The secondary reason is that
it initializes some ata_port struct members.
However, ata_sas_port_alloc() is only used in a single location,
sas_ata_init(), which already performs some ata_port struct member
initialization, so it does not make sense to spread this initialization
out over two separate locations.
Thus, remove the wrapper and instead export the libata function directly,
and move the libsas specific ata_port initialization to sas_ata_init(),
which already does some ata_port initialization.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-19-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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ap->local_port_no is simply ap->port_no + 1.
Since ap->local_port_no can be derived from ap->port_no, there is no need
for the ap->local_port_no struct member, so remove ap->local_port_no.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-16-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Commit f31871951b38 ("libata: separate out ata_host_alloc() and
ata_host_register()") added ata_host_alloc(), where the API allowed
a LLD to overallocate the number of ports supplied to ata_host_alloc(),
as long as the LLD decreased host->n_ports before calling
ata_host_register().
However, this functionally has never ever been used by a single LLD.
Because of the current API design, the assignment of ap->print_id is
deferred until registration time, which is bad, because that means that
the ata_port_*() print functions cannot be used by a LLD until after
registration time, which means that a LLD is forced to use a print
function that is non-port specific, even for a port specific error.
Remove the support for decreasing the number of ports, such that it will
be possible to assign ap->print_id earlier.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-14-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Remove unused function declaration for ata_scsi_detect().
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-13-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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The ata_sas_tport_add() and ata_sas_tport_delete() wrappers only exist in
order to export the internal libata functions which they wrap.
Remove the wrappers and instead export the libata functions directly.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-12-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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libsas is currently not freeing all the struct ata_port struct members,
e.g. ncq_sense_buf for a driver supporting Command Duration Limits (CDL).
Add a function, ata_port_free(), that is used to free a ata_port,
including its struct members. It makes sense to keep the code related to
freeing a ata_port in its own function, which will also free all the
struct members of struct ata_port.
Fixes: 18bd7718b5c4 ("scsi: ata: libata: Handle completion of CDL commands using policy 0xD")
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240629124210.181537-8-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Pull SCSI updates from James Bottomley:
"Updates to the usual drivers (ufs, lpfc, qla2xxx, mpi3mr, libsas).
The major update (which causes a conflict with block, see below) is
Christoph removing the queue limits and their associated block
helpers.
The remaining patches are assorted minor fixes and deprecated function
updates plus a bit of constification"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (141 commits)
scsi: mpi3mr: Sanitise num_phys
scsi: lpfc: Copyright updates for 14.4.0.2 patches
scsi: lpfc: Update lpfc version to 14.4.0.2
scsi: lpfc: Add support for 32 byte CDBs
scsi: lpfc: Change lpfc_hba hba_flag member into a bitmask
scsi: lpfc: Introduce rrq_list_lock to protect active_rrq_list
scsi: lpfc: Clear deferred RSCN processing flag when driver is unloading
scsi: lpfc: Update logging of protection type for T10 DIF I/O
scsi: lpfc: Change default logging level for unsolicited CT MIB commands
scsi: target: Remove unused list 'device_list'
scsi: iscsi: Remove unused list 'connlist_err'
scsi: ufs: exynos: Add support for Tensor gs101 SoC
scsi: ufs: exynos: Add some pa_dbg_ register offsets into drvdata
scsi: ufs: exynos: Allow max frequencies up to 267Mhz
scsi: ufs: exynos: Add EXYNOS_UFS_OPT_TIMER_TICK_SELECT option
scsi: ufs: exynos: Add EXYNOS_UFS_OPT_UFSPR_SECURE option
scsi: ufs: dt-bindings: exynos: Add gs101 compatible
scsi: qla2xxx: Fix debugfs output for fw_resource_count
scsi: qedf: Ensure the copied buf is NUL terminated
scsi: bfa: Ensure the copied buf is NUL terminated
...
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Switch to the ->device_configure method instead of ->slave_configure and
update the block limits on the passed in queue_limits instead of using the
per-limit accessors.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240409143748.980206-21-hch@lst.de
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Export libata NCQ Priority configuration helpers to be reused for libsas
managed SATA devices.
Switched locking from spin_lock_irq() to spin_lock_irqsave(). In the
future someone might call these helper functions when interrupts are
disabled. spin_unlock_irq() could lead to a premature re-enabling of
interrupts, whereas spin_unlock_irqrestore() restores the interrupt state
to its condition prior to the spin_lock_irqsave() call.
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240307214418.3812290-2-ipylypiv@google.com
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Commit 3cc2ffe5c16d ("scsi: sd: Differentiate system and runtime start/stop
management") introduced the manage_system_start_stop scsi_device flag to
allow libata to indicate to the SCSI disk driver that nothing should be
done when resuming a disk on system resume. This change turned the
execution of sd_resume() into a no-op for ATA devices on system
resume. While this solved deadlock issues during device resume, this change
also wrongly removed the execution of opal_unlock_from_suspend(). As a
result, devices with TCG OPAL locking enabled remain locked and
inaccessible after a system resume from sleep.
To fix this issue, introduce the SCSI driver resume method and implement it
with the sd_resume() function calling opal_unlock_from_suspend(). The
former sd_resume() function is renamed to sd_resume_common() and modified
to call the new sd_resume() function. For non-ATA devices, this result in
no functional changes.
In order for libata to explicitly execute sd_resume() when a device is
resumed during system restart, the function scsi_resume_device() is
introduced. libata calls this function from the revalidation work executed
on devie resume, a state that is indicated with the new device flag
ATA_DFLAG_RESUMING. Doing so, locked TCG OPAL enabled devices are unlocked
on resume, allowing normal operation.
Fixes: 3cc2ffe5c16d ("scsi: sd: Differentiate system and runtime start/stop management")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218538
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240319071209.1179257-1-dlemoal@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Currently, both ATA_LPM_UNKNOWN (0) and ATA_LPM_MAX_POWER (1) displays
as "max_performance" in sysfs.
This is quite misleading as they are not the same.
For ATA_LPM_UNKNOWN, ata_eh_set_lpm() will not be called at all,
leaving the configuration in unknown state.
For ATA_LPM_MAX_POWER, ata_eh_set_lpm() is called, and setting the
policy to ATA_LPM_MAX_POWER.
This also matches the description of the SATA_MOBILE_LPM_POLICY Kconfig:
0 => Keep firmware settings
1 => Maximum performance
Thus, update the sysfs description for ATA_LPM_UNKNOWN to match reality.
While at it, update libata.h to mention that the ascii descriptions
are in libata-sata.c and not in libata-scsi.c.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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Simplify the inline DMA helper functions ata_using_mwdma(),
ata_using_udma() and ata_dma_enabled() to directly return as a boolean
the result of their test condition.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
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Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct ata_cpr_log.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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The target LPM policy can be set using either a Kconfig or a kernel module
parameter.
However, if the board type is set to anything but board_ahci_low_power,
then the LPM policy will overridden and set to ATA_LPM_UNKNOWN.
Additionally, if the default suspend is suspend to idle, depending on the
hardware capabilities of the HBA, ahci_update_initial_lpm_policy() might
override the LPM policy to either ATA_LPM_MIN_POWER_WITH_PARTIAL or
ATA_LPM_MIN_POWER.
All this means that it is very hard to know which LPM policy a user will
actually be using on a given system.
In order to make it easier to debug LPM related issues, print the LPM
policy on boot.
One common LPM related issue is that the device fails to link up.
Because of that, we cannot add this print to ata_dev_configure(), as that
function is only called after a successful link up. Instead, add the info
using ata_port_desc(), with the help of a new ata_port_desc_misc() helper.
The port description is printed once per port during boot.
Before changes:
ata1: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780100 irq 170
ata2: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780180 irq 170
After changes:
ata1: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780100 irq 170 lpm-pol 4
ata2: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780180 irq 170 lpm-pol 4
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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The introduction of a device link to create a consumer/supplier
relationship between the scsi device of an ATA device and the ATA port
of that ATA device fixes the ordering of system suspend and resume
operations. For suspend, the scsi device is suspended first and the ata
port after it. This is fine as this allows the synchronize cache and
START STOP UNIT commands issued by the scsi disk driver to be executed
before the ata port is disabled.
For resume operations, the ata port is resumed first, followed
by the scsi device. This allows having the request queue of the scsi
device to be unfrozen after the ata port resume is scheduled in EH,
thus avoiding to see new requests prematurely issued to the ATA device.
Since libata sets manage_system_start_stop to 1, the scsi disk resume
operation also results in issuing a START STOP UNIT command to the
device being resumed so that the device exits standby power mode.
However, restoring the ATA device to the active power mode must be
synchronized with libata EH processing of the port resume operation to
avoid either 1) seeing the start stop unit command being received too
early when the port is not yet resumed and ready to accept commands, or
after the port resume process issues commands such as IDENTIFY to
revalidate the device. In this last case, the risk is that the device
revalidation fails with timeout errors as the drive is still spun down.
Commit 0a8589055936 ("ata,scsi: do not issue START STOP UNIT on resume")
disabled issuing the START STOP UNIT command to avoid issues with it.
But this is incorrect as transitioning a device to the active power
mode from the standby power mode set on suspend requires a media access
command. The IDENTIFY, READ LOG and SET FEATURES commands executed in
libata EH context triggered by the ata port resume operation may thus
fail.
Fix these synchronization issues is by handling a device power mode
transitions for system suspend and resume directly in libata EH context,
without relying on the scsi disk driver management triggered with the
manage_system_start_stop flag.
To do this, the following libata helper functions are introduced:
1) ata_dev_power_set_standby():
This function issues a STANDBY IMMEDIATE command to transitiom a device
to the standby power mode. For HDDs, this spins down the disks. This
function applies only to ATA and ZAC devices and does nothing otherwise.
This function also does nothing for devices that have the
ATA_FLAG_NO_POWEROFF_SPINDOWN or ATA_FLAG_NO_HIBERNATE_SPINDOWN flag
set.
For suspend, call ata_dev_power_set_standby() in
ata_eh_handle_port_suspend() before the port is disabled and frozen.
ata_eh_unload() is also modified to transition all enabled devices to
the standby power mode when the system is shutdown or devices removed.
2) ata_dev_power_set_active() and
This function applies to ATA or ZAC devices and issues a VERIFY command
for 1 sector at LBA 0 to transition the device to the active power mode.
For HDDs, since this function will complete only once the disk spin up.
Its execution uses the same timeouts as for reset, to give the drive
enough time to complete spinup without triggering a command timeout.
For resume, call ata_dev_power_set_active() in
ata_eh_revalidate_and_attach() after the port has been enabled and
before any other command is issued to the device.
With these changes, the manage_system_start_stop and no_start_on_resume
scsi device flags do not need to be set in ata_scsi_dev_config(). The
flag manage_runtime_start_stop is still set to allow the sd driver to
spinup/spindown a disk through the sd runtime operations.
Fixes: 0a8589055936 ("ata,scsi: do not issue START STOP UNIT on resume")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
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There is no direct device ancestry defined between an ata_device and
its scsi device which prevents the power management code from correctly
ordering suspend and resume operations. Create such ancestry with the
ata device as the parent to ensure that the scsi device (child) is
suspended before the ata device and that resume handles the ata device
before the scsi device.
The parent-child (supplier-consumer) relationship is established between
the ata_port (parent) and the scsi device (child) with the function
device_add_link(). The parent used is not the ata_device as the PM
operations are defined per port and the status of all devices connected
through that port is controlled from the port operations.
The device link is established with the new function
ata_scsi_slave_alloc(), and this function is used to define the
->slave_alloc callback of the scsi host template of all ata drivers.
Fixes: a19a93e4c6a9 ("scsi: core: pm: Rely on the device driver core for async power management")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
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On certain SATA controllers, softreset fails after wakeup from S2RAM with
the message "softreset failed (1st FIS failed)", sometimes resulting in
drives not being detected again. With the increased timeout, this issue
is avoided. Instead, "softreset failed (device not ready)" is now
logged 1-2 times; this later failure seems to cause fewer problems
however, and the drives are detected reliably once they've spun up and
the probe is retried.
The issue was observed with the primary SATA controller of the QNAP
TS-453B, which is an "Intel Corporation Celeron/Pentium Silver Processor
SATA Controller [8086:31e3] (rev 06)" integrated in the Celeron J4125 CPU,
and the following drives:
- Seagate IronWolf ST12000VN0008
- Seagate IronWolf ST8000NE0004
The SATA controller seems to be more relevant to this issue than the
drives, as the same drives are always detected reliably on the secondary
SATA controller on the same board (an ASMedia 106x) without any "softreset
failed" errors even without the increased timeout.
Fixes: e7d3ef13d52a ("libata: change drive ready wait after hard reset to 5s")
Cc: stable@vger.kernel.org
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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In AHCI 1.3.1, the register description for CAP.SSC:
"When cleared to ‘0’, software must not allow the HBA to initiate
transitions to the Slumber state via agressive link power management nor
the PxCMD.ICC field in each port, and the PxSCTL.IPM field in each port
must be programmed to disallow device initiated Slumber requests."
In AHCI 1.3.1, the register description for CAP.PSC:
"When cleared to ‘0’, software must not allow the HBA to initiate
transitions to the Partial state via agressive link power management nor
the PxCMD.ICC field in each port, and the PxSCTL.IPM field in each port
must be programmed to disallow device initiated Partial requests."
Ensure that we always set the corresponding bits in PxSCTL.IPM, such that
a device is not allowed to initiate transitions to power states which are
unsupported by the HBA.
DevSleep is always initiated by the HBA, however, for completeness, set the
corresponding bit in PxSCTL.IPM such that agressive link power management
cannot transition to DevSleep if DevSleep is not supported.
sata_link_scr_lpm() is used by libahci, ata_piix and libata-pmp.
However, only libahci has the ability to read the CAP/CAP2 register to see
if these features are supported. Therefore, in order to not introduce any
regressions on ata_piix or libata-pmp, create flags that indicate that the
respective feature is NOT supported. This way, the behavior for ata_piix
and libata-pmp should remain unchanged.
This change is based on a patch originally submitted by Runa Guo-oc.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Fixes: 1152b2617a6e ("libata: implement sata_link_scr_lpm() and make ata_dev_set_feature() global")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Now that all libata drivers have migrated to use the error_handler
callback, remove the deprecated phy_reset and eng_timeout callbacks.
Also remove references to non-existent functions sata_phy_reset and
ata_qc_timeout from Documentation/driver-api/libata.rst.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Remove ata_bus_probe() as it is unused.
Also, remove references to ata_bus_probe and port_disable in
Documentation/driver-api/libata.rst, as neither exist anymore.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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ata_sas_port_init() now only contains a single initialization.
Move this single initialization to ata_sas_port_alloc(), since:
1) ata_sas_port_alloc() already initializes some of the struct members.
2) ata_sas_port_alloc() is only used by libsas.
Suggested-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Rename __ata_port_probe() to ata_port_probe() and drop the wrapper
ata_sas_async_probe().
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Unused.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Is now a wrapper around kfree(), so call it directly.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Callbacks are empty now, so remove them.
Also, remove the call to ap->ops->port_start() in ata_sas_port_init(),
as this would otherwise cause a NULL pointer dereference, now when the
callback is gone.
Signed-off-by: Hannes Reinecke <hare@suse.de>
[niklas: remove the call to ap->ops->port_start() in ata_sas_port_init()]
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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With commit 65a15d6560df ("scsi: ipr: Remove SATA support") all
libata drivers now have the error_handler() callback provided,
so we can stop checking for non-existing error_handler callback.
Signed-off-by: Hannes Reinecke <hare@suse.de>
[niklas: fixed review comments, rebased, solved conflicts during rebase,
fixed bug that unconditionally dumped all QCs, removed the now unused
function ata_dump_status(), removed the now unreachable failure paths in
atapi_qc_complete(), removed the non-EH function to request ATAPI sense]
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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sata_deb_timing_{hotplug|long|normal}[] store 'unsigned long' debounce
timeouts in ms, while sata_link_debounce() eventually uses those timeouts
by calling ata_{deadline|msleep}( which take just 'unsigned int'. Change
the debounce timeout table element's type to 'unsigned int' -- all these
timeouts happily fit into 'unsigned int'...
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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ata_wait_register() passes its 'unsigned long {interval|timeout}' params
verbatim to ata_{msleep|deadline}() that just take 'unsigned int' param
for the time intervals in ms -- eliminate unneeded implicit casts...
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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ata_deadline() passes its 'unsigned long timeout_msecs' parameter verbatim
to msecs_to_jiffies() which takes just 'unsigned int' -- eliminate unneeded
implicit cast...
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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Pull SCSI updates from James Bottomley:
"Updates to the usual drivers (ufs, pm80xx, libata-scsi, smartpqi,
lpfc, qla2xxx).
We have a couple of major core changes impacting other systems:
- Command Duration Limits, which spills into block and ATA
- block level Persistent Reservation Operations, which touches block,
nvme, target and dm
Both of these are added with merge commits containing a cover letter
explaining what's going on"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (187 commits)
scsi: core: Improve warning message in scsi_device_block()
scsi: core: Replace scsi_target_block() with scsi_block_targets()
scsi: core: Don't wait for quiesce in scsi_device_block()
scsi: core: Don't wait for quiesce in scsi_stop_queue()
scsi: core: Merge scsi_internal_device_block() and device_block()
scsi: sg: Increase number of devices
scsi: bsg: Increase number of devices
scsi: qla2xxx: Remove unused nvme_ls_waitq wait queue
scsi: ufs: ufs-pci: Add support for Intel Arrow Lake
scsi: sd: sd_zbc: Use PAGE_SECTORS_SHIFT
scsi: ufs: wb: Add explicit flush_threshold sysfs attribute
scsi: ufs: ufs-qcom: Switch to the new ICE API
scsi: ufs: dt-bindings: qcom: Add ICE phandle
scsi: ufs: ufs-mediatek: Set UFSHCD_QUIRK_MCQ_BROKEN_RTC quirk
scsi: ufs: ufs-mediatek: Set UFSHCD_QUIRK_MCQ_BROKEN_INTR quirk
scsi: ufs: core: Add host quirk UFSHCD_QUIRK_MCQ_BROKEN_RTC
scsi: ufs: core: Add host quirk UFSHCD_QUIRK_MCQ_BROKEN_INTR
scsi: ufs: core: Remove dedicated hwq for dev command
scsi: ufs: core: mcq: Fix the incorrect OCS value for the device command
scsi: ufs: dt-bindings: samsung,exynos: Drop unneeded quotes
...
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A CDL timeout for policy 0xF is defined as a NCQ error, just with a CDL
specific sk/asc/ascq in the sense data. Therefore, the existing code in
libata does not need to be modified to handle a policy 0xF CDL timeout.
For Command Duration Limits policy 0xD:
The device shall complete the command without error with the additional
sense code set to DATA CURRENTLY UNAVAILABLE.
Since a CDL timeout for policy 0xD is not an error, we cannot use the NCQ
Command Error log (10h).
Instead, we need to read the Sense Data for Successful NCQ Commands log
(0Fh).
In the success case, just like in the error case, we cannot simply read a
log page from the interrupt handler itself, since reading a log page
involves sending a READ LOG DMA EXT or READ LOG EXT command.
Therefore, we add a new EH action ATA_EH_GET_SUCCESS_SENSE. When a command
completes without error, and when the ATA_SENSE bit is set, this new action
is set as pending, and EH is scheduled.
This way, similar to the NCQ error case, the log page will be read from EH
context.
An alternative would have been to add a new kthread or workqueue to handle
this. However, extending EH can be done with minimal changes and avoids the
need to synchronize a new kthread/workqueue with EH.
Co-developed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Link: https://lore.kernel.org/r/20230511011356.227789-20-nks@flawful.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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For devices supporting the command duration limits feature, translate the
dld field of read and write operation to set the command duration limit
index field of the command task file when the duration limit feature is
enabled.
The function ata_set_tf_cdl() is introduced to do this. For unqueued (non
NCQ) read and write operations, this function sets the command duration
limit index set as the lower 3 bits of the feature field. For queued NCQ
read/write commands, the index is set as the lower 3 bits of the auxiliary
field.
The flag ATA_QCFLAG_HAS_CDL is introduced to indicate that a command
taskfile has a non zero cdl field.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Link: https://lore.kernel.org/r/20230511011356.227789-19-nks@flawful.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Add support for the ATA feature control sub-page of the control mode page
to enable/disable the command duration limits feature using the cdl_ctrl
field of the ATA feature control sub-page.
Both mode sense and mode select translation are supported. For mode sense,
the ata device flag ATA_DFLAG_CDL_ENABLED is used to cache the status of
the command duration limits feature. Enabling this feature is done using a
SET FEATURES command with a cdl action set to 1 when the page cdl_ctrl
field value is 0x2 (T2A and T2B pages supported). If this field is 0, CDL
is disabled using the SET FEATURES command with a cdl action set to 0.
Since a device CDL and NCQ priority features should not be used
simultaneously, ata_mselect_control_ata_feature() returns an error when
attempting to enable CDL with the device priority feature enabled.
Conversely, the function ata_ncq_prio_enable_store() used to enable the use
of the device NCQ priority feature through sysfs is modified to return an
error if the device CDL feature is enabled.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Link: https://lore.kernel.org/r/20230511011356.227789-18-nks@flawful.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Use the supported capabilities identify device data log page to detect if a
device supports the command duration limits feature. For devices supporting
this feature, set the device flag ATA_DFLAG_CDL. To support SCSI-ATA
translation, retrieve the command duration limits log page 18h and cache
this page content using the cdl array added to the ata_device data
structure.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Link: https://lore.kernel.org/r/20230511011356.227789-15-nks@flawful.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata
Pull ata updates from Damien Le Moal:
- Add support for the .remove_new callback to the ata_platform code to
simplify device removal interface (Uwe)
- Code simplification in ata_dev_revalidate() (Yahu)
- Fix code indentation and coding style in the pata_parport protocol
modules to avoid warnings from static code analyzers (me)
- Clarify ata_eh_qc_retry() behavior with better comments (Niklas)
- Simplify and improve ata_change_queue_depth() behavior to have a
consistent behavior between libsas managed devices and libata managed
devices (e.g. AHCI connected devices) (me)
- Cleanup libata-scsi and libata-eh code to use the ata_ncq_enabled()
and ata_ncq_supported() helpers instead of open coding flags tests
(me)
- Cleanup ahci_reset_controller() code (me)
- Change the pata_octeon_cf and sata_svw drivers to use
of_property_read_reg() to simplify the code (Rob, me)
- Remove unnecessary include files from ahci_octeon driver (me)
- Modify the DesignWare ahci dt bindings to add support for the
Rockchip RK3588 AHCI (Sebastian)
* tag 'ata-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata: (29 commits)
dt-bindings: phy: rockchip: rk3588 has two reset lines
dt-bindings: ata: dwc-ahci: add Rockchip RK3588
dt-bindings: ata: dwc-ahci: add PHY clocks
ata: ahci_octeon: Remove unnecessary include
ata: pata_octeon_cf: Add missing header include
ata: ahci: Cleanup ahci_reset_controller()
ata: Use of_property_read_reg() to parse "reg"
ata: libata-scsi: Use ata_ncq_supported in ata_scsi_dev_config()
ata: libata-eh: Use ata_ncq_enabled() in ata_eh_speed_down()
ata: libata-sata: Improve ata_change_queue_depth()
ata: libata-sata: Simplify ata_change_queue_depth()
ata: libata-eh: Clarify ata_eh_qc_retry() behavior at call site
ata: pata_parport: Fix on26 module code indentation and style
ata: pata_parport: Fix on20 module code indentation and style
ata: pata_parport: Fix ktti module code indentation and style
ata: pata_parport: Fix kbic module code indentation and style
ata: pata_parport: Fix friq module code indentation and style
ata: pata_parport: Fix fit3 module code indentation and style
ata: pata_parport: Fix fit2 module code indentation and style
ata: pata_parport: Fix epia module code indentation and style
...
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Commit 141f3d6256e5 ("ata: libata-sata: Fix device queue depth control")
added a struct ata_device argument to ata_change_queue_depth() to
address problems with changing the queue depth of ATA devices managed
through libsas. This was due to problems with ata_scsi_find_dev() which
are now fixed with commit 7f875850f20a ("ata: libata-scsi: Use correct
device no in ata_find_dev()").
Undo some of the changes of commit 141f3d6256e5: remove the added struct
ata_device aregument and use again ata_scsi_find_dev() to find the
target ATA device structure. While doing this, also make sure that
ata_scsi_find_dev() is called with ap->lock held, as it should.
libsas and libata call sites of ata_change_queue_depth() are updated to
match the modified function arguments.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
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The function returned zero unconditionally, so the function returning an
int is something between useless and irritating. With the goal to make
platform drivers' remove function return void, it's helpful to convert
the function accordingly. This converts several drivers to the new
.remove_new callback that was introduced to smoothen the platform driver
conversion.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
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When an ATA port is resumed from sleep, the port is reset and a power
management request issued to libata EH to reset the port and rescanning
the device(s) attached to the port. Device rescanning is done by
scheduling an ata_scsi_dev_rescan() work, which will execute
scsi_rescan_device().
However, scsi_rescan_device() takes the generic device lock, which is
also taken by dpm_resume() when the SCSI device is resumed as well. If
a device rescan execution starts before the completion of the SCSI
device resume, the rcu locking used to refresh the cached VPD pages of
the device, combined with the generic device locking from
scsi_rescan_device() and from dpm_resume() can cause a deadlock.
Avoid this situation by changing struct ata_port scsi_rescan_task to be
a delayed work instead of a simple work_struct. ata_scsi_dev_rescan() is
modified to check if the SCSI device associated with the ATA device that
must be rescanned is not suspended. If the SCSI device is still
suspended, ata_scsi_dev_rescan() returns early and reschedule itself for
execution after an arbitrary delay of 5ms.
Reported-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reported-by: Joe Breuer <linux-kernel@jmbreuer.net>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217530
Fixes: a19a93e4c6a9 ("scsi: core: pm: Rely on the device driver core for async power management")
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Joe Breuer <linux-kernel@jmbreuer.net>
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Make it explicit that ATA host templates are not modified.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com> (for DWC AHCI SATA)
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com> (for Tegra)
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230322195515.1267197-5-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Move the detection of a device FUA support from
ata_scsiop_mode_sense()/ata_dev_supports_fua() to device scan time in
ata_dev_configure().
The function ata_dev_config_fua() is introduced to detect if a device
supports FUA and this support is indicated using the new device flag
ATA_DFLAG_FUA.
In order to blacklist known buggy devices, the horkage flag
ATA_HORKAGE_NO_FUA is introduced. Similarly to other horkage flags, the
libata.force= arguments "fua" and "nofua" are also introduced to allow
a user to control this horkage flag through the "force" libata
module parameter.
The ATA_DFLAG_FUA device flag is set only and only if all the following
conditions are met:
* libata.fua module parameter is set to 1
* The device supports the WRITE DMA FUA EXT command,
* The device is not marked with the ATA_HORKAGE_NO_FUA flag, either from
the blacklist or set by the user with libata.force=nofua
* The device supports NCQ (while this is not mandated by the standards,
this restriction is introduced to avoid problems with older non-NCQ
devices).
Enabling or diabling libata FUA support for all devices can now also be
done using the "force=[no]fua" module parameter when libata.fua is set
to 1.
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
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Introduce the inline helper function ata_ncq_supported() to test if a
device supports NCQ commands. The function ata_ncq_enabled() is also
rewritten using this new helper function.
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
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