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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/gi…
…t/jejb/scsi Pull SCSI updates from James Bottomley: "Updates to the usual drivers (ufs, lpfc, qla2xxx, mpi3mr, libsas) and the usual minor updates and bug fixes but no significant core changes" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (116 commits) scsi: storvsc: Handle additional SRB status values scsi: libsas: Delete sas_ata_task.retry_count scsi: libsas: Delete sas_ata_task.stp_affil_pol scsi: libsas: Delete sas_ata_task.set_affil_pol scsi: libsas: Delete sas_ssp_task.task_prio scsi: libsas: Delete sas_ssp_task.enable_first_burst scsi: libsas: Delete sas_ssp_task.retry_count scsi: libsas: Delete struct scsi_core scsi: libsas: Delete enum sas_phy_type scsi: libsas: Delete enum sas_class scsi: libsas: Delete sas_ha_struct.lldd_module scsi: target: Fix write perf due to unneeded throttling scsi: lpfc: Do not abuse UUID APIs and LPFC_COMPRESS_VMID_SIZE scsi: pm8001: Remove unused declarations scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock scsi: elx: sli4: Remove code duplication scsi: bfa: Replace one-element array with flexible-array member in struct fc_rscn_pl_s scsi: qla2xxx: Remove unused declarations scsi: pmcraid: Use pci_dev_id() to simplify the code scsi: pm80xx: Set RETFIS when requested by libsas ...
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@@ -1437,180 +1437,6 @@ Description: | |
| If avail_wb_buff < wb_flush_threshold, it indicates that WriteBooster buffer needs to | ||
| be flushed, otherwise it is not necessary. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/hpb_version | ||
| What: /sys/bus/platform/devices/*.ufs/device_descriptor/hpb_version | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the HPB specification version. | ||
| The full information about the descriptor can be found in the UFS | ||
| HPB (Host Performance Booster) Extension specifications. | ||
| Example: version 1.2.3 = 0123h | ||
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| The file is read only. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/device_descriptor/hpb_control | ||
| What: /sys/bus/platform/devices/*.ufs/device_descriptor/hpb_control | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows an indication of the HPB control mode. | ||
| 00h: Host control mode | ||
| 01h: Device control mode | ||
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| The file is read only. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_region_size | ||
| What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_region_size | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the bHPBRegionSize which can be calculated | ||
| as in the following (in bytes): | ||
| HPB Region size = 512B * 2^bHPBRegionSize | ||
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| The file is read only. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_number_lu | ||
| What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_number_lu | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the maximum number of HPB LU supported by | ||
| the device. | ||
| 00h: HPB is not supported by the device. | ||
| 01h ~ 20h: Maximum number of HPB LU supported by the device | ||
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| The file is read only. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_subregion_size | ||
| What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_subregion_size | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the bHPBSubRegionSize, which can be | ||
| calculated as in the following (in bytes) and shall be a multiple of | ||
| logical block size: | ||
| HPB Sub-Region size = 512B x 2^bHPBSubRegionSize | ||
| bHPBSubRegionSize shall not exceed bHPBRegionSize. | ||
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| The file is read only. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/hpb_max_active_regions | ||
| What: /sys/bus/platform/devices/*.ufs/geometry_descriptor/hpb_max_active_regions | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the maximum number of active HPB regions that | ||
| is supported by the device. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/unit_descriptor/hpb_lu_max_active_regions | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the maximum number of HPB regions assigned to | ||
| the HPB logical unit. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/unit_descriptor/hpb_pinned_region_start_offset | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the start offset of HPB pinned region. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/unit_descriptor/hpb_number_pinned_regions | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the number of HPB pinned regions assigned to | ||
| the HPB logical unit. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_stats/hit_cnt | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the number of reads that changed to HPB read. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_stats/miss_cnt | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the number of reads that cannot be changed to | ||
| HPB read. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_stats/rcmd_noti_cnt | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the number of response UPIUs that has | ||
| recommendations for activating sub-regions and/or inactivating region. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_stats/rcmd_active_cnt | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: For the HPB device control mode, this entry shows the number of | ||
| active sub-regions recommended by response UPIUs. For the HPB host control | ||
| mode, this entry shows the number of active sub-regions recommended by the | ||
| HPB host control mode heuristic algorithm. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_stats/rcmd_inactive_cnt | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: For the HPB device control mode, this entry shows the number of | ||
| inactive regions recommended by response UPIUs. For the HPB host control | ||
| mode, this entry shows the number of inactive regions recommended by the | ||
| HPB host control mode heuristic algorithm. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_stats/map_req_cnt | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the number of read buffer commands for | ||
| activating sub-regions recommended by response UPIUs. | ||
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| The file is read only. | ||
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| What: /sys/class/scsi_device/*/device/hpb_params/requeue_timeout_ms | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the requeue timeout threshold for write buffer | ||
| command in ms. The value can be changed by writing an integer to | ||
| this entry. | ||
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| What: /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_size_hpb_single_cmd | ||
| What: /sys/bus/platform/devices/*.ufs/attributes/max_data_size_hpb_single_cmd | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the maximum HPB data size for using a single HPB | ||
| command. | ||
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||
| === ======== | ||
| 00h 4KB | ||
| 01h 8KB | ||
| 02h 12KB | ||
| ... | ||
| FFh 1024KB | ||
| === ======== | ||
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| The file is read only. | ||
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||
| What: /sys/bus/platform/drivers/ufshcd/*/flags/hpb_enable | ||
| What: /sys/bus/platform/devices/*.ufs/flags/hpb_enable | ||
| Date: June 2021 | ||
| Contact: Daejun Park <[email protected]> | ||
| Description: This entry shows the status of HPB. | ||
|
|
||
| == ============================ | ||
| 0 HPB is not enabled. | ||
| 1 HPB is enabled | ||
| == ============================ | ||
|
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| The file is read only. | ||
|
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||
| Contact: Daniil Lunev <[email protected]> | ||
| What: /sys/bus/platform/drivers/ufshcd/*/capabilities/ | ||
| What: /sys/bus/platform/devices/*.ufs/capabilities/ | ||
|
|
@@ -1648,76 +1474,3 @@ Description: Indicates status of Write Booster. | |
|
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| The file is read only. | ||
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||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/activation_thld | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: In host control mode, reads are the major source of activation | ||
| trials. Once this threshold hs met, the region is added to the | ||
| "to-be-activated" list. Since we reset the read counter upon | ||
| write, this include sending a rb command updating the region | ||
| ppn as well. | ||
|
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||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/normalization_factor | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: In host control mode, we think of the regions as "buckets". | ||
| Those buckets are being filled with reads, and emptied on write. | ||
| We use entries_per_srgn - the amount of blocks in a subregion as | ||
| our bucket size. This applies because HPB1.0 only handles | ||
| single-block reads. Once the bucket size is crossed, we trigger | ||
| a normalization work - not only to avoid overflow, but mainly | ||
| because we want to keep those counters normalized, as we are | ||
| using those reads as a comparative score, to make various decisions. | ||
| The normalization is dividing (shift right) the read counter by | ||
| the normalization_factor. If during consecutive normalizations | ||
| an active region has exhausted its reads - inactivate it. | ||
|
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||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/eviction_thld_enter | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: Region deactivation is often due to the fact that eviction took | ||
| place: A region becomes active at the expense of another. This is | ||
| happening when the max-active-regions limit has been crossed. | ||
| In host mode, eviction is considered an extreme measure. We | ||
| want to verify that the entering region has enough reads, and | ||
| the exiting region has much fewer reads. eviction_thld_enter is | ||
| the min reads that a region must have in order to be considered | ||
| a candidate for evicting another region. | ||
|
|
||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/eviction_thld_exit | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: Same as above for the exiting region. A region is considered to | ||
| be a candidate for eviction only if it has fewer reads than | ||
| eviction_thld_exit. | ||
|
|
||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/read_timeout_ms | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: In order not to hang on to "cold" regions, we inactivate | ||
| a region that has no READ access for a predefined amount of | ||
| time - read_timeout_ms. If read_timeout_ms has expired, and the | ||
| region is dirty, it is less likely that we can make any use of | ||
| HPB reading it so we inactivate it. Still, deactivation has | ||
| its overhead, and we may still benefit from HPB reading this | ||
| region if it is clean - see read_timeout_expiries. | ||
|
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||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/read_timeout_expiries | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: If the region read timeout has expired, but the region is clean, | ||
| just re-wind its timer for another spin. Do that as long as it | ||
| is clean and did not exhaust its read_timeout_expiries threshold. | ||
|
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||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/timeout_polling_interval_ms | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: The frequency with which the delayed worker that checks the | ||
| read_timeouts is awakened. | ||
|
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||
| What: /sys/class/scsi_device/*/device/hpb_param_sysfs/inflight_map_req | ||
| Date: February 2021 | ||
| Contact: Avri Altman <[email protected]> | ||
| Description: In host control mode the host is the originator of map requests. | ||
| To avoid flooding the device with map requests, use a simple throttling | ||
| mechanism that limits the number of inflight map requests. | ||
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