Changes in sysfs-block-device

cdd5b5a9761fd66d17586e4f4ba6588c70e640ea - Merge branch 'next' into for-linus

Tue, 07 Nov 2023 00:42:08 +0100

Merge branch 'next' into for-linusPrepare input updates for 6.7 merge window. List of files: /linux/Documentation/ABI/testing/sysfs-block-device

34069d12e239ae8f36dd96c378e4622fb1c42a76 - Merge tag 'v6.5' into next

Tue, 05 Sep 2023 23:08:14 +0200

Merge tag 'v6.5' into nextSync up with mainline to bring in updates to the shared infrastructure. List of files: /linux/Documentation/ABI/testing/sysfs-block-device

2612e3bbc0386368a850140a6c9b990cd496a5ec - Merge drm/drm-next into drm-intel-next

Mon, 07 Aug 2023 23:14:42 +0200

Merge drm/drm-next into drm-intel-nextCatching-up with drm-next and drm-intel-gt-next.It will unblock a code refactor around the platformdefinitions (names vs acronyms).Signed-off-by: Rodrigo Vivi List of files: /linux/Documentation/ABI/testing/sysfs-block-device

9f771739a04919226081a107167596de75108fbb - Merge drm/drm-next into drm-intel-gt-next

Mon, 07 Aug 2023 12:29:40 +0200

Merge drm/drm-next into drm-intel-gt-nextNeed to pull in b3e4aae612ec ("drm/i915/hdcp: Modify hdcp_gsc_message msg sending mechanism") asa dependency for https://patchwork.freedesktop.org/series/121735/Signed-off-by: Joonas Lahtinen List of files: /linux/Documentation/ABI/testing/sysfs-block-device

61b7369483efb5e0a9f3b48e75fac00d46d661e0 - Merge drm/drm-next into drm-misc-next

Mon, 24 Jul 2023 15:44:47 +0200

Merge drm/drm-next into drm-misc-nextBackmerging to get v6.5-rc2.Signed-off-by: Thomas Zimmermann List of files: /linux/Documentation/ABI/testing/sysfs-block-device

0791faebfe750292a8a842b64795a390ca4a3b51 - ASoC: Merge v6.5-rc2

Mon, 17 Jul 2023 07:12:31 +0200

ASoC: Merge v6.5-rc2Get a similar baseline to my other branches, and fixes for people usingthe branch. List of files: /linux/Documentation/ABI/testing/sysfs-block-device

2f98e686ef59b5d19af5847d755798e2031bee3a - Merge v6.5-rc1 into drm-misc-fixes

Tue, 11 Jul 2023 09:23:20 +0200

Merge v6.5-rc1 into drm-misc-fixesBoris needs 6.5-rc1 in drm-misc-fixes to prevent a conflict.Signed-off-by: Maxime Ripard List of files: /linux/Documentation/ABI/testing/sysfs-block-device

3fbff91afbf0148e937b8718ed865b073c587d9f - Merge branch 'master' into mm-hotfixes-stable

Mon, 03 Jul 2023 03:53:03 +0200

Merge branch 'master' into mm-hotfixes-stable List of files: /linux/Documentation/ABI/testing/sysfs-block-device

ca7ce08d6a063e0ccb91dc57f9bc213120d0d1a7 - Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Fri, 30 Jun 2023 20:57:07 +0200

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiPull 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 ... List of files: /linux/Documentation/ABI/testing/sysfs-block-device

8b60e2189fcd8b10b592608256eb97aebfcff147 - Merge patch series "Add Command Duration Limits support"

Mon, 22 May 2023 23:09:51 +0200

Merge patch series "Add Command Duration Limits support"Niklas Cassel says:This series adds support for Command Duration Limits.The series is based on linux tag: v6.4-rc1The series can also be found in git: https://github.com/floatious/linux/commits/cdl-v7=================CDL in ATA / SCSI=================Command Duration Limits is defined in:T13 ATA Command Set - 5 (ACS-5) andT10 SCSI Primary Commands - 6 (SPC-6) respectively(a simpler version of CDL is defined in T10 SPC-5).CDL defines Duration Limits Descriptors (DLD).7 DLDs for read commands and 7 DLDs for write commands.Simply put, a DLD contains a limit and a policy.A command can specify that a certain limit should be applied by settingthe DLD index field (3 bits, so 0-7) in the command itself.The DLD index points to one of the 7 DLDs.DLD index 0 means no descriptor, so no limit.DLD index 1-7 means DLD 1-7.A DLD can have a few different policies, but the two major ones are:-Policy 0xF (abort), command will be completed with command aborted error(ATA) or status CHECK CONDITION (SCSI), with sense data indicating thatthe command timed out.-Policy 0xD (complete-unavailable), command will be completed withouterror (ATA) or status GOOD (SCSI), with sense data indicating that thecommand timed out. Note that the command will not have transferred anydata to/from the device when the command timed out, even though thecommand returned success.Regardless of the CDL policy, in case of a CDL timeout, the I/O willresult in a -ETIME error to user-space.The DLDs are defined in the CDL log page(s) and are readable and writable.Reading and writing the CDL DLDs are outside the scope of the kernel.If a user wants to read or write the descriptors, they can do so using auser-space application that sends passthrough commands, such as cdl-tools:https://github.com/westerndigitalcorporation/cdl-tools================================The introduction of ioprio hints================================What the kernel does provide, is a method to let I/O use one of the CDL DLDsdefined in the device. Note that the kernel will simply forward the DLD indexto the device, so the kernel currently does not know, nor does it need to know,how the DLDs are defined inside the device.The way that the CDL DLD index is supplied to the kernel is by introducing anew 10 bit "ioprio hint" field within the existing 16 bit ioprio definition.Currently, only 6 out of the 16 ioprio bits are in use, the remaining 10 bitsare unused, and are currently explicitly disallowed to be set by the kernel.For now, we only add ioprio hints representing CDL DLD index 1-7. Additionalioprio hints for other QoS features could be defined in the future.A theoretical future work could be to make an I/O scheduler aware of thesehints. E.g. for CDL, an I/O scheduler could make use of the duration limitin each descriptor, and take that information into account while schedulingcommands. Right now, the ioprio hints will be ignored by the I/O schedulers.==============================How to use CDL from user-space==============================Since CDL is mutually exclusive with NCQ priority(see ncq_prio_enable and sas_ncq_prio_enable inDocumentation/ABI/testing/sysfs-block-device),CDL has to be explicitly enabled using:echo 1 > /sys/block/$bdev/device/cdl_enableSince the ioprio hints are supplied through the existing I/O priority API,it should be simple for an application to make use of the ioprio hints.It simply has to reuse one of the new macros defined ininclude/uapi/linux/ioprio.h: IOPRIO_PRIO_HINT() or IOPRIO_PRIO_VALUE_HINT(),and supply one of the new hints defined in include/uapi/linux/ioprio.h:IOPRIO_HINT_DEV_DURATION_LIMIT_[1-7], which indicates that the I/O shoulduse the corresponding CDL DLD index 1-7.By reusing the I/O priority API, the user can both define a DLD to use perAIO (io_uring sqe->ioprio or libaio iocb->aio_reqprio) or per-thread(ioprio_set()).=======Testing=======With the following fio patches:https://github.com/floatious/fio/commits/cdlfio adds support for ioprio hints, such that CDL can be tested using e.g.:fio --ioengine=io_uring --cmdprio_percentage=10 --cmdprio_hint=DLD_indexA simple way to test is to use a DLD with a very short duration limit,and send large reads. Regardless of the CDL policy, in case of a CDLtimeout, the I/O will result in a -ETIME error to user-space.We also provide a CDL test suite located in the cdl-tools repo, see:https://github.com/westerndigitalcorporation/cdl-tools#testing-a-system-command-duration-limits-supportWe have tested this patch series using:-real hardware-the following QEMU implementation:https://github.com/floatious/qemu/tree/cdl(NOTE: the QEMU implementation requires you to define the CDL policy at compiletime, so you currently need to recompile QEMU when switching between policies.)===================Further information===================For further information about CDL, see Damien's slides:Presented at SDC 2021:https://www.snia.org/sites/default/files/SDC/2021/pdfs/SNIA-SDC21-LeMoal-Be-On-Time-command-duration-limits-Feature-Support-in%20Linux.pdfPresented at Lund Linux Con 2022:https://drive.google.com/file/d/1I6ChFc0h4JY9qZdO1bY5oCAdYCSZVqWw/view?usp=sharing================Changes since V6================-Rebased series on v6.4-rc1.-Picked up Reviewed-by tags from Hannes (Thank you Hannes!)-Picked up Reviewed-by tag from Christoph (Thank you Christoph!)-Changed KernelVersion from 6.4 to 6.5 for new sysfs attributes.For older change logs, see previous patch series versions:https://lore.kernel.org/linux-scsi/20230406113252.41211-1-nks@flawful.org/https://lore.kernel.org/linux-scsi/20230404182428.715140-1-nks@flawful.org/https://lore.kernel.org/linux-scsi/20230309215516.3800571-1-niklas.cassel@wdc.com/https://lore.kernel.org/linux-scsi/20230124190308.127318-1-niklas.cassel@wdc.com/https://lore.kernel.org/linux-scsi/20230112140412.667308-1-niklas.cassel@wdc.com/https://lore.kernel.org/linux-scsi/20221208105947.2399894-1-niklas.cassel@wdc.com/Link: https://lore.kernel.org/r/20230511011356.227789-1-nks@flawful.orgSigned-off-by: Martin K. Petersen List of files: /linux/Documentation/ABI/testing/sysfs-block-device

1b22cfb14142aba7742d307c4f8d7006f919308c - scsi: core: Allow enabling and disabling command duration limits

Thu, 11 May 2023 03:13:42 +0200

scsi: core: Allow enabling and disabling command duration limitsAdd the sysfs scsi_device attribute cdl_enable to allow a user to enable ordisable a device command duration limits feature. CDL is disabled bydefault. This feature must be explicitly enabled by a user by setting thecdl_enable attribute to 1.The new function scsi_cdl_enable() does not do anything beside setting thecdl_enable field of struct scsi_device in the case of a (real) SCSI device(e.g. a SAS HDD). For ATA devices, the command duration limits featureneeds to be enabled/disabled using the ATA feature sub-page of the controlmode page. To do so, the scsi_cdl_enable() function checks if this modepage is supported using scsi_mode_sense(). If it is, scsi_mode_select() isused to enable and disable CDL.Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Co-developed-by: Niklas Cassel Signed-off-by: Niklas Cassel Link: https://lore.kernel.org/r/20230511011356.227789-10-nks@flawful.orgSigned-off-by: Martin K. Petersen List of files: /linux/Documentation/ABI/testing/sysfs-block-device

624885209f31eb9985bf51abe204ecbffe2fdeea - scsi: core: Detect support for command duration limits

Thu, 11 May 2023 03:13:41 +0200

scsi: core: Detect support for command duration limitsIntroduce the function scsi_cdl_check() to detect if a device supportscommand duration limits (CDL). Support for the READ 16, WRITE 16, READ 32and WRITE 32 commands are checked using the function scsi_report_opcode()to probe the rwcdlp and cdlp bits as they indicate the mode page definingthe command duration limits descriptors that apply to the command beingtested.If any of these commands support CDL, the field cdl_supported of structscsi_device is set to 1 to indicate that the device supports CDL.Support for CDL for a device is advertizes through sysfs using the newcdl_supported device attribute. This attribute value is 1 for a devicesupporting CDL and 0 otherwise.Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Co-developed-by: Niklas Cassel Signed-off-by: Niklas Cassel Link: https://lore.kernel.org/r/20230511011356.227789-9-nks@flawful.orgSigned-off-by: Martin K. Petersen List of files: /linux/Documentation/ABI/testing/sysfs-block-device

762f99f4f3cb41a775b5157dd761217beba65873 - Merge branch 'next' into for-linus

Sat, 15 Jan 2022 21:09:44 +0100

Merge branch 'next' into for-linusPrepare input updates for 5.17 merge window. List of files: /linux/Documentation/ABI/testing/sysfs-block-device

8632987380765dee716d460640aa58d58d52998e - Merge branch 'reset/of-get-optional-exclusive' of git://git.pengutronix.de/pza/linux into timers/drivers/next

Thu, 09 Dec 2021 13:57:57 +0100

Merge branch 'reset/of-get-optional-exclusive' of git://git.pengutronix.de/pza/linux into timers/drivers/next"Add optional variant of of_reset_control_get_exclusive(). If therequested reset is not specified in the device tree, this functionreturns NULL instead of an error."This dependency is needed for the Generic Timer Module (a.k.a OSTM)support for RZ/G2L.Signed-off-by: Daniel Lezcano List of files: /linux/Documentation/ABI/testing/sysfs-block-device

5d8dfaa71d87f742c53309b95cb6a8b274119027 - Merge tag 'v5.15' into next

Thu, 09 Dec 2021 08:43:50 +0100

Merge tag 'v5.15' into nextSync up with the mainline to get the latest APIs and DT bindings. List of files: /linux/Documentation/ABI/testing/sysfs-block-device

e700ac213a0f793fb4f83098413303e3dd080892 - Merge branch 'pruss-fix' into fixes

Wed, 06 Oct 2021 06:55:44 +0200

Merge branch 'pruss-fix' into fixesMerge in a fix for pruss reset issue caused by enabling pruss for am335x. List of files: /linux/Documentation/ABI/testing/sysfs-block-device

ffb1e76f4f32d2b8ea4189df0484980370476395 - Merge tag 'v5.15-rc2' into spi-5.15

Mon, 20 Sep 2021 16:56:58 +0200

Merge tag 'v5.15-rc2' into spi-5.15Linux 5.15-rc2 List of files: /linux/Documentation/ABI/testing/sysfs-block-device

d1b803f4ca4f25d6f171219d039f9410a10b29ee - Merge drm/drm-next into drm-intel-next

Wed, 15 Sep 2021 16:12:51 +0200

Merge drm/drm-next into drm-intel-nextCatch-up on 5.15-rc1 and sync with drm-intel-gt-nextto prepare the PXP topic branch.Signed-off-by: Rodrigo Vivi List of files: /linux/Documentation/ABI/testing/sysfs-block-device

d5dd580deb54483cce0cb5bbe3f1a132a28c767d - Merge drm/drm-next into drm-intel-gt-next

Wed, 15 Sep 2021 12:23:27 +0200

Merge drm/drm-next into drm-intel-gt-nextClose the divergence which has caused patches not to apply andhave a solid baseline for the PXP patches that Rodrigo will senda topic branch PR for.Signed-off-by: Joonas Lahtinen List of files: /linux/Documentation/ABI/testing/sysfs-block-device

2f76520561d01a5f37e6d6ed2c2e441b6a355a96 - Merge drm/drm-next into drm-misc-next

Tue, 14 Sep 2021 09:25:30 +0200

Merge drm/drm-next into drm-misc-nextKickstart new drm-misc-next cycle.Signed-off-by: Maxime Ripard List of files: /linux/Documentation/ABI/testing/sysfs-block-device