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* | | | [PATCH] libata-ncq: implement NCQ device configurationTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all NCQ related stuff are in place, implement NCQ device configuration and bump ATA_MAX_QUEUE to 32 thus activating NCQ support. Original implementation is from Jens Axboe. Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | [PATCH] libata-ncq: implement ap->qc_active, ap->sactive and complete helperTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add ap->qc_active and ap->sactive, mask of all active qcs and libata's view of the SActive register, respectively. Also, implement ata_qc_complete_multiple() which takes new qc_active mask and complete multiple qcs according to the mask. These will be used to track NCQ commands and complete them. The distinction between ap->qc_active and ap->sactive is also useful for later PM implementation. Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | [PATCH] libata-ncq: rename ap->qactive to ap->qc_allocatedTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename ap->qactive to ap->qc_allocated. This is to accomodate addition of ap->qc_active, mask of active qcs. Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | [PATCH] libata-ncq: add NCQ related ATA/libata constants and macrosTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | Add NCQ related ATA/libata constants and macros. Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | Merge branch 'irq-pio'Tejun Heo2006-05-15
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/scsi/libata-core.c include/linux/libata.h
| * \ \ \ Merge branch 'upstream'Jeff Garzik2006-04-12
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| * | | | Merge branch 'upstream'Jeff Garzik2006-04-04
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| * \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-04-02
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/scsi/libata-core.c drivers/scsi/pdc_adma.c drivers/scsi/sata_mv.c drivers/scsi/sata_nv.c drivers/scsi/sata_promise.c drivers/scsi/sata_qstor.c drivers/scsi/sata_sx4.c drivers/scsi/sata_vsc.c include/linux/libata.h
| * \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-04-01
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| * \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-03-29
| |\ \ \ \ \ \ \ | | | |_|_|_|_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/scsi/sata_mv.c
| * | | | | | | [PATCH] libata-dev: Cleanup unused enums/functionsAlbert Lee2006-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cleanup the following unused functions: - ata_pio_poll() - ata_pio_complete() - ata_pio_first_block() - ata_pio_block() - ata_pio_error() ap->pio_task_timeout and other enums. Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | | | | | | Merge branch 'upstream'Jeff Garzik2006-03-24
| |\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/scsi/libata-core.c
| * \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-03-24
| |\ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/scsi/sata_vsc.c
| * \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-03-11
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| * \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-02-20
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| * \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-02-20
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| * \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-02-13
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| * \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-02-11
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-02-10
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-02-09
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream-2.6.17'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'tmp'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'tmp'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'tmp'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'tmp'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'tmp'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'master'Jeff Garzik2006-01-27
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2006-01-17
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-12-13
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-12-13
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-12-06
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-11-18
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'master'Jeff Garzik2005-11-11
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| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata irq-pio: merge the ata_dataout_task workqueue with ↵Albert Lee2005-11-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ata_pio_task workqueue - remove ap->dataout_task from struct ata_port - let ata_pio_task() handle the HSM_ST_FIRST state. - rename ata_dataout_task() to ata_pio_first_block() - replace the ata_dataout_task workqueue with ata_pio_task workqueue Signed-off-by: Albert Lee <albertcc@tw.ibm.com> ======== Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge branch 'upstream'Jeff Garzik2005-11-09
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'master'Jeff Garzik2005-11-05
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'master'Jeff Garzik2005-10-30
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-10-30
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'master'Jeff Garzik2005-10-28
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-10-18
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge branch 'upstream'Jeff Garzik2005-10-09
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| * \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Merge libata upstream (which includes C/H/S support) include irq-pio branch.Jeff Garzik2005-10-03
| |\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge branch 'upstream'
| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata irq-pio: rename atapi_packet_task() and commentsAlbert Lee2005-09-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata irq-pio: add comments and cleanupAlbert Lee2005-09-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata: interrupt driven pio for LLDAlbert Lee2005-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | libata.h: libata-core: Add ATA_FLAG_PIO_POLLING flag for LLDs that expect interrupt for command completion only. sata_nv.c: sata_vsc.c: irq handler is wrapper around ata_host_intr(), can handle PIO interrupts. sata_promise.c: sata_sx4.c: sata_qstor.c: sata_mv.c: Private irq handler. Polling mode ATA_FLAG_PIO_POLLING used for compatibility. Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata: interrupt driven pio for libata-coreAlbert Lee2005-09-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - add PIO_ST_FIRST for the state before sending ATAPI CDB or sending "ATA PIO data out" first data block. - add ATA_TFLAG_POLLING and ATA_DFLAG_CDB_INTR flags - remove the ATA_FLAG_NOINTR flag since the interrupt handler is now aware of the states - modify ata_pio_sector() and atapi_pio_bytes() to work in the interrupt context - modify the ata_host_intr() to handle PIO interrupts - modify ata_qc_issue_prot() to initialize states - atapi_packet_task() changed to handle "ATA PIO data out" first data block - support the pre-ATA4 ATAPI device which raise interrupt when ready to receive CDB Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata-eh: implement BMDMA EHTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement stock BMDMA error handling methods. Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata-eh: implement new EHTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement new EH. The exported interface is ata_do_eh() which is to be called from ->error_handler and performs the following steps to recover the failed port. ata_eh_autopsy() : analyze SError/TF, determine the cause of failure and required recovery actions and record it in ap->eh_context ata_eh_report() : report the failure to user ata_eh_recover() : perform recovery actions described in ap->eh_context ata_eh_finish() : finish failed qcs LLDDs can customize error handling by modifying eh_context before calling ata_do_eh() or, if necessary, doing so inbetween each major steps by calling each step explicitly. Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata-eh: implement ata_eh_info and ata_eh_contextTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct ata_eh_info serves as the communication channel between execution path and EH. Execution path describes detected error condition in ap->eh_info and EH recovers the port using it. To avoid missing error conditions detected during EH, EH makes its own copy of eh_info and clears it on entry allowing error info to accumulate during EH. Most EH states including EH's copy of eh_info are stored in ap->eh_context (struct ata_eh_context) which is owned by EH and thus doesn't require any synchronization to access and alter. This standardized context makes it easy to integrate various parts of EH and extend EH to handle multiple links (for PM). Signed-off-by: Tejun Heo <htejun@gmail.com>
* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [PATCH] libata-eh: implement dev->eringTejun Heo2006-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements ata_ering and uses it to define dev->ering. ata_ering is a ring buffer which records libata errors - whether a command was for normar IO request, err_mask and timestamp. Errors are recorded per-device in dev->ering. This will be used by EH to determine recovery actions. Signed-off-by: Tejun Heo <htejun@gmail.com>