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2025-11-12vfio/ccw: Convert to get_region_info_capsJason Gunthorpe
Remove the duplicate code and flatten the call chain. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Eric Farman <farman@linux.ibm.com> Link: https://lore.kernel.org/r/18-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/gvt: Convert to get_region_info_capsJason Gunthorpe
Remove the duplicate code and change info to a pointer. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/17-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio: Add get_region_info_caps opJason Gunthorpe
This op does the copy to/from user for the info and can return back a cap chain through a vfio_info_cap * result. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/15-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio: Require drivers to implement get_region_infoJason Gunthorpe
Remove the fallback through the ioctl callback, no drivers use this now. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Reviewed-by: Mostafa Saleh <smostafa@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/14-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/gvt: Provide a get_region_info opJason Gunthorpe
Move it out of intel_vgpu_ioctl() and re-indent it. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/13-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/ccw: Provide a get_region_info opJason Gunthorpe
Move it out of vfio_ccw_mdev_ioctl() and re-indent it. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Eric Farman <farman@linux.ibm.com> Link: https://lore.kernel.org/r/12-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/cdx: Provide a get_region_info opJason Gunthorpe
Change the signature of vfio_cdx_ioctl_get_region_info() and hook it to the op. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/11-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/fsl: Provide a get_region_info opJason Gunthorpe
Move it out of vfio_fsl_mc_ioctl() and re-indent it. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Acked-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/10-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/platform: Provide a get_region_info opJason Gunthorpe
Move it out of vfio_platform_ioctl() and re-indent it. Add it to all platform drivers. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Reviewed-by: Mostafa Saleh <smostafa@google.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/9-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/pci: Fill in the missing get_region_info opsJason Gunthorpe
Now that every variant driver provides a get_region_info op remove the ioctl based dispatch from vfio_pci_core_ioctl(). Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/5-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/nvgrace: Convert to the get_region_info opJason Gunthorpe
Change the signature of nvgrace_gpu_ioctl_get_region_info() Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Ankit Agrawal <ankita@nvidia.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/4-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/virtio: Convert to the get_region_info opJason Gunthorpe
Remove virtiovf_vfio_pci_core_ioctl() and change the signature of virtiovf_pci_ioctl_get_region_info(). Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/3-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12vfio/hisi: Convert to the get_region_info opJason Gunthorpe
Change the function signature of hisi_acc_vfio_pci_ioctl() and re-indent it. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Acked-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/2-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12cxl: Clarify comment in spa_maps_hpa()Dave Jiang
Update the comment in spa_maps_hpa() to clearly convey the construction of extended linear cache. Suggested-by: Dan Williams <dan.j.williams@intel.com> Link: https://lore.kernel.org/linux-cxl/68eea19c7e67e_2f899100a8@dwillia2-mobl4.notmuch/ Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Reviewed-by: Gregory Price <gourry@gourry.net> Link: https://patch.msgid.link/20251106170108.1468304-3-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-12cxl: Rename region_res_match_cxl_range() to spa_maps_hpa()Dave Jiang
The function name region_res_match_cxl_range() does not accurately convey the operation of address comparison with cache size. Rename to spa_maps_hpa() to provide a better function name. Suggested-by: Dan Williams <dan.j.williams@intel.com> Link: https://lore.kernel.org/linux-cxl/68eea19c7e67e_2f899100a8@dwillia2-mobl4.notmuch/ Reviewed-by: Jonathan Cameron <jonathan.cameron@huwei.com> Reviewed-by: Gregory Price <gourry@gourry.net> Link: https://patch.msgid.link/20251106170108.1468304-2-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-12scsi: ufs: core: Switch to scsi_get_internal_cmd()Bart Van Assche
Instead of storing the tag of the reserved command in hba->reserved_slot, use scsi_get_internal_cmd() and scsi_put_internal_cmd() to allocate the tag for the reserved command dynamically. Add ufshcd_queue_reserved_command() for submitting reserved commands. Add support in ufshcd_abort() for device management commands. Use blk_execute_rq() for submitting reserved commands. Remove the code and data structures that became superfluous. This includes ufshcd_wait_for_dev_cmd(), hba->reserved_slot and ufs_dev_cmd.complete. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-29-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Move code out of ufshcd_wait_for_dev_cmd()Bart Van Assche
The ufshcd_dev_cmd_completion() call is useful for some but not for all ufshcd_wait_for_dev_cmd() callers. Hence, remove the ufshcd_dev_cmd_completion() call from ufshcd_wait_for_dev_cmd() and move it past the ufshcd_issue_dev_cmd() calls where appropriate. This makes it easier to detect timeout errors for UPIU frames submitted through the BSG interface. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-28-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Make blk_mq_tagset_busy_iter() skip reserved requestsBart Van Assche
A later patch will convert hba->reserved_slot into a reserved tag. Make blk_mq_tagset_busy_iter() skip reserved requests such that device management commands are skipped. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-27-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Remove the ufshcd_lrb task_tag memberBart Van Assche
Remove the ufshcd_lrb task_tag member and use scsi_cmd_to_rq(cmd)->tag instead. Use rq->tag instead of lrbp->task_tag. This patch reduces the size of struct ufshcd_lrb. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-26-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Pass a SCSI pointer instead of an LRB pointerBart Van Assche
Pass a pointer to a SCSI command between functions instead of an LRB pointer. This change prepares for removing the ufshcd_lrb task_tag member. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-25-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Optimize the hot pathBart Van Assche
Set .cmd_size in the SCSI host template such that the SCSI core makes struct scsi_cmnd and struct ufshcd_lrb adjacent. Convert the cmd->lrbp and lrbp->cmd memory loads into pointer offset calculations. Remove the data structure members that became superfluous, namely ufshcd_lrb.cmd and ufs_hba.lrb. Since ufshcd_lrb.cmd is removed, this pointer cannot be used anymore to test whether or not a command is a SCSI command. Introduce a new function for this purpose, namely ufshcd_is_scsi_cmd(). Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-24-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Do not clear driver-private command dataBart Van Assche
Tell the SCSI core to skip the memset() call that clears driver-private data because __ufshcd_setup_cmd() performs all necessary initialization. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-23-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Make the reserved slot a reserved requestBart Van Assche
Instead of letting the SCSI core allocate hba->nutrs - 1 commands, let the SCSI core allocate hba->nutrs commands, set the number of reserved tags to 1 and use the reserved tag for device management commands. This patch changes the 'reserved slot' from hba->nutrs - 1 into 0 because the block layer reserves the smallest tags for reserved commands. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-22-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Use hba->reserved_slotBart Van Assche
Use hba->reserved_slot instead of open-coding it. This patch prepares for changing the value of hba->reserved_slot. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-21-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Call ufshcd_init_lrb() laterBart Van Assche
Call ufshcd_init_lrb() from inside ufshcd_setup_dev_cmd() instead of ufshcd_host_memory_configure(). This patch prepares for calling ufshcd_host_memory_configure() before the information is available that is required to call ufshcd_setup_dev_cmd(). Reviewed-by: Avri Altman <avri.altman@sandisk.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-20-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Allocate the SCSI host earlierBart Van Assche
Call ufshcd_add_scsi_host() before any UPIU commands are sent to the UFS device. This patch prepares for letting ufshcd_add_scsi_host() allocate memory for both SCSI and UPIU commands. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-19-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Rework the SCSI host queue depth calculation codeBart Van Assche
Prepare for allocating the SCSI host earlier by making the SCSI host queue depth independent of the queue depth supported by the UFS device. This patch may increase the queue depth of the UFS SCSI host. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-18-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Rework ufshcd_eh_device_reset_handler()Bart Van Assche
Merge the MCQ mode and legacy mode loops into a single loop. This patch prepares for optimizing the hot path by removing the direct hba->lrb[] accesses from ufshcd_eh_device_reset_handler(). Reviewed-by: Avri Altman <avri.altman@sandisk.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-17-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Rework ufshcd_mcq_compl_pending_transfer()Bart Van Assche
Replace a tag loop with blk_mq_tagset_busy_iter(). This patch prepares for removing the hba->lrb[] array. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-16-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Change the monitor function argument typesBart Van Assche
Pass a SCSI command pointer instead of a struct ufshcd_lrb pointer. This patch prepares for combining the SCSI command and ufshcd_lrb data structures into a single data structure. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-15-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Only call ufshcd_should_inform_monitor() for SCSI commandsBart Van Assche
ufshcd_should_inform_monitor() only returns 'true' for SCSI commands. Instead of checking inside ufshcd_should_inform_monitor() whether its second argument represents a SCSI command, only call this function for SCSI commands. This patch prepares for removing the lrbp->cmd member. Reviewed-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-14-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Change the type of one ufshcd_send_command() argumentBart Van Assche
Change the 'task_tag' argument into an LRB pointer. This patch prepares for the removal of the hba->lrb[] array. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-13-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Change the type of one ufshcd_add_command_trace() argumentBart Van Assche
Change the 'tag' argument into a SCSI command pointer. This patch prepares for the removal of the hba->lrb[] array. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-12-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Only call ufshcd_add_command_trace() for SCSI commandsBart Van Assche
Instead of checking inside ufshcd_add_command_trace() whether 'cmd' points at a SCSI command, let the caller perform that check. This patch prepares for removing the lrbp->cmd pointer. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-11-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Change the type of one ufshcd_add_cmd_upiu_trace() argumentBart Van Assche
Change the 'tag' argument into an LRB pointer. This patch prepares for the removal of the hba->lrb[] array. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-10-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: ufs: core: Move an assignment in ufshcd_mcq_process_cqe()Bart Van Assche
Since 'tag' is only used inside the if-statement, move the 'tag' assignment into the if-statement. This patch prepares for introducing a WARN_ON_ONCE() call in ufshcd_mcq_get_tag() if the tag lookup fails. Reviewed-by: Avri Altman <avri.altman@sandisk.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-9-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: scsi_debug: Abort SCSI commands via an internal commandBart Van Assche
Add a .queue_reserved_command() implementation and call it from the code path that aborts SCSI commands. This ensures that the code for allocating a pseudo SCSI device and also the code for allocating and processing reserved commands gets triggered while running blktests. Most of the code in this patch is a modified version of code from John Garry. See also https://lore.kernel.org/linux-scsi/75018e17-4dea-4e1b-8c92-7a224a1e13b9@oracle.com/ Reviewed-by: John Garry <john.g.garry@oracle.com> Suggested-by: John Garry <john.g.garry@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-8-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: core: Add scsi_{get,put}_internal_cmd() helpersHannes Reinecke
Add helper functions to allow LLDDs to allocate and free internal commands. [ bvanassche: changed the 'nowait' argument into a 'flags' argument. See also https://lore.kernel.org/linux-scsi/20211125151048.103910-3-hare@suse.de/ ] Reviewed-by: John Garry <john.g.garry@oracle.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-7-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: core: Introduce .queue_reserved_command()John Garry
Reserved commands will be used by SCSI LLDs for submitting internal commands. Since the SCSI host, target and device limits do not apply to the reserved command use cases, bypass the SCSI host limit checks for reserved commands. Introduce the .queue_reserved_command() callback for reserved commands. Additionally, do not activate the SCSI error handler if a reserved command fails such that reserved commands can be submitted from inside the SCSI error handler. [ bvanassche: modified patch title and patch description. Renamed .reserved_queuecommand() into .queue_reserved_command(). Changed the second argument of __blk_mq_end_request() from 0 into error code in the completion path if cmd->result != 0. Rewrote the scsi_queue_rq() changes. See also https://lore.kernel.org/linux-scsi/1666693096-180008-5-git-send-email-john.garry@huawei.com/ ] Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://patch.msgid.link/20251031204029.2883185-6-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: core: Support allocating a pseudo SCSI deviceHannes Reinecke
Allocate a pseudo SCSI device if 'nr_reserved_cmds' has been set. Pseudo SCSI devices have the SCSI ID <max_id>:U64_MAX so they won't clash with any devices the LLD might create. Pseudo SCSI devices are excluded from scanning and will not show up in sysfs. Additionally, pseudo SCSI devices are skipped by shost_for_each_device(). This prevents that the SCSI error handler tries to submit a reset to a non-existent logical unit. Do not allocate a budget map for pseudo SCSI devices since the cmd_per_lun limit does not apply to pseudo SCSI devices. Do not perform queue depth ramp up / ramp down for pseudo SCSI devices. Pseudo SCSI devices will be used to send internal commands to a storage device. [ bvanassche: edited patch description / renamed host_sdev into pseudo_sdev / unexported scsi_get_host_dev() / modified error path in scsi_get_pseudo_dev() / skip pseudo devices in __scsi_iterate_devices() and also when calling sdev_init(), sdev_configure() and sdev_destroy(). See also https://lore.kernel.org/linux-scsi/20211125151048.103910-2-hare@suse.de/ ] Reviewed-by: John Garry <john.g.garry@oracle.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-5-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: core: Make the budget map optionalBart Van Assche
Prepare for not allocating a budget map for pseudo SCSI devices by checking whether a budget map has been allocated before using it. Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: John Garry <john.g.garry@oracle.com> Cc: Ming Lei <ming.lei@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-4-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: core: Move two statementsBart Van Assche
Move two statements that will be needed for pseudo SCSI devices in front of code that won't be needed for pseudo SCSI devices. No functionality has been changed. Reviewed-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-3-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12scsi: core: Support allocating reserved commandsHannes Reinecke
Quite some drivers are using management commands internally. These commands typically use the same tag pool as regular SCSI commands. Tags for these management commands are set aside before allocating the block-mq tag bitmap for regular SCSI commands. The block layer already supports this via the reserved tag mechanism. Add a new field 'nr_reserved_cmds' to the SCSI host template to instruct the block layer to set aside a tag space for these management commands by using reserved tags. Exclude reserved commands from .can_queue because .can_queue is visible in sysfs. [ bvanassche: modified patch title and patch description. Left out the following statements: "if (sht->nr_reserved_cmds)" and also "if (sdev->host->nr_reserved_cmds) flags |= BLK_MQ_REQ_RESERVED;". Moved nr_reserved_cmds declarations and statements close to the corresponding can_queue declarations and statements. See also https://lore.kernel.org/linux-scsi/20210503150333.130310-11-hare@suse.de/ ] Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: John Garry <john.g.garry@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20251031204029.2883185-2-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-12vfio: Provide a get_region_info opJason Gunthorpe
Instead of hooking the general ioctl op, have the core code directly decode VFIO_DEVICE_GET_REGION_INFO and call an op just for it. This is intended to allow mechanical changes to the drivers to pull their VFIO_DEVICE_GET_REGION_INFO int oa function. Later patches will improve the function signature to consolidate more code. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Pranjal Shrivastava <praan@google.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/1-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-11-12acpi/hmat: Fix lockdep warning for hmem_register_resource()Dave Jiang
The following lockdep splat was observed while kernel auto-online a CXL memory region: ====================================================== WARNING: possible circular locking dependency detected 6.17.0djtest+ #53 Tainted: G W ------------------------------------------------------ systemd-udevd/3334 is trying to acquire lock: ffffffff90346188 (hmem_resource_lock){+.+.}-{4:4}, at: hmem_register_resource+0x31/0x50 but task is already holding lock: ffffffff90338890 ((node_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x2e/0x70 which lock already depends on the new lock. [..] Chain exists of: hmem_resource_lock --> mem_hotplug_lock --> (node_chain).rwsem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock((node_chain).rwsem); lock(mem_hotplug_lock); lock((node_chain).rwsem); lock(hmem_resource_lock); The lock ordering can cause potential deadlock. There are instances where hmem_resource_lock is taken after (node_chain).rwsem, and vice versa. Split out the target update section of hmat_register_target() so that hmat_callback() only envokes that section instead of attempt to register hmem devices that it does not need to. [ dj: Fix up comment to be closer to 80cols. (Jonathan) ] Fixes: cf8741ac57ed ("ACPI: NUMA: HMAT: Register "soft reserved" memory as an "hmem" device") Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Tested-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> Reviewed-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Link: https://patch.msgid.link/20251105235115.85062-3-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-12acpi/hmat: Return when generic target is updatedDave Jiang
With the current code flow, once the generic target is updated target->registered is set and the remaining code is skipped. So return immediately instead of going through the checks and then skip. Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/20251105235115.85062-2-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-12drm/i915/cursor: Initialize 845 vs 865 cursor size separatelyVille Syrjälä
The if+ternary combo used for the max cursor width initialization on 845/865 is rather cumbersome. Just split this into a straight up if ladder. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patch.msgid.link/20251107181126.5743-10-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2025-11-12drm/i915/cursor: Extract intel_cursor_mode_config_init()Ville Syrjälä
Move the max cursor size initialization into intel_cursor.c so that all the platform specific details about cursors are concentrated in one file. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patch.msgid.link/20251107181126.5743-9-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2025-11-12drm/i915: Use mode_config->cursor_width for cursor DDB allocationVille Syrjälä
Replace the hardcoded 256 with mode_config->cursor_width when doing the cursor DDB allocation. Currently 256 is correct for all SKL+, but this might change in the future. One less place to change should that happen. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patch.msgid.link/20251107181126.5743-8-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2025-11-12drm/i915/wm: Use drm_get_format_info() in SKL+ cursor DDB allocationVille Syrjälä
Replace the technically inaccurate drm_format_info() with the accurate drm_get_format_info() in the SKL+ cursor DDB allocation code. Since we're only interested in the linear modifier here, the two functions do actually return the same information. But let's not use drm_format_info() to avoid setting a bad example. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patch.msgid.link/20251107181126.5743-7-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
generated by cgit v1.2.3 (git 2.25.1) at 2026-09-13 02:30:47 +0000