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* sata_mv fix ifctl handlingMark Lord2008-04-171-23/+19
| | | | | | | Fix handling of the SATA_INTERFACE_CFG register to match datasheet requirements. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* sata_mv clean up mv_stop_edma usageMark Lord2008-04-171-45/+42
| | | | | | | Clean up uses of mv_stop_edma{_engine}() to match datasheet requirements. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* sata_mv cosmetic fixesMark Lord2008-04-171-57/+59
| | | | | | | Various cosmetic fixes in preparation for real code changes later on. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* use ATA_TAG_INTERNAL in ata_tag_internal()Yoichi Yuasa2008-04-171-1/+1
| | | | | | | It should be ATA_TAG_INTERNAL. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Add 'short help text' to ATA_ACPI so it's [de]selectable.Chris Wedgwood2008-04-171-1/+1
| | | | | | | | | | | | ATA_ACPI isn't selectable right now because it lacks 'short help text'. This means it's always enabled and always enables ACPI_DOCK. Add text so it's now [de]selectable. cc: Jeff Garzik <jeff@garzik.org> cc: Tejun Heo <htejun@gmail.com> cc: Len Brown <len.brown@intel.com> Signed-off-by: Chris Wedgwood <cw@f00f.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pdc_adma: kill adma_host_stop()Tejun Heo2008-04-171-10/+0
| | | | | | | | | adma_host_stop() does the same thing that adma_port_stop() does. Kill it. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Mark Lord <liml@rtr.ca> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pdc_adma: inherit ata_sff_port_opsTejun Heo2008-04-171-12/+2
| | | | | | | | | With the previous ops standardization, pdc_adma now can inherit ata_sff_port_ops instead of ata_base_port_ops. Make the change. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Mark Lord <liml@rtr.ca> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata/pdc_adma: make SFF EH handle non-bmdma SFF drivers and standardize ↵Tejun Heo2008-04-172-15/+4
| | | | | | | | | | | | | | | | | pdc_adma ops pdc_adma has interface similar to SFF but has its own DMA interface. It currently implements noop bmdma ops to avoid crashing ata_bmdma_error_handler() which BTW actually is EH for SFF drivers. This patch makes ata_bmdma_error_handler() dereference bmdma ops iff bmdma_addr is initialized as done in ata_bmdma_post_internal_cmd. This change allows pdc_adma to standardize ops and use SFF error_handler and post_internal_cmd. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Mark Lord <liml@rtr.ca> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: kill unused ata_flush_cache()Tejun Heo2008-04-172-27/+0
| | | | | | | | ata_flush_code() hasn't been in use for quite some time now. Kill it. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: implement ATA_QCFLAG_RETRYTejun Heo2008-04-172-10/+9
| | | | | | | | | | Currently whether a command should be retried after failure is determined inside ata_eh_finish(). Add ATA_QCFLAG_RETRY and move the logic into ata_eh_autopsy(). This makes things clearer and helps extending retry determination logic. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: make ata_tf_to_lba[48]() genericTejun Heo2008-04-172-6/+8
| | | | | | | | | | ata_tf_to_lba[48]() currently return LBA in tf + 1 for ata_read_native_max_address(). Make them return LBA and make it global so that it can be used to read LBA off TF for other purposes. ata_read_native_max_address() now adds 1 itself. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] sata_nv: disable ADMA by defaultJeff Garzik2008-04-171-1/+1
| | | | | | | Continues to have open issues, and engineering support is extremely difficult to come by, according to fellow NVIDIA engineers. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata annotationsAl Viro2008-04-173-8/+8
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata_piix: kill ich6_sata_ahci and clean upTejun Heo2008-04-171-36/+25
| | | | | | | | | ich6_sata_ahci and ich6_sata are identical. Kill ich6_sata_ahci and drop _ahci postfixes from controller ids, which doesn't really mean anything at this point. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata_piix: don't attach to ICH6M in ahci modeTejun Heo2008-04-171-23/+20
| | | | | | | | | | | | | | | | | | | ata_piix when attached to ICH6M in AHCI mode doesn't provide any benefit over using ahci and has detection problems. Don't let ata_piix claim ICH6M if it's in AHCI mode. This change makes ICH6R the only one which ata_piix can attach to even when it's in ahci mode which is necessary as some devices don't work properly under ahci mode. Drop PIIX_FLAG_AHCI and match the controller directly so that piix_disable_ahci() is called only for it. This change makes PIIX_SCC no longer used and it gets dropped too. This fixes bz 9491. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Robert M. Albrecht <romal@gmx.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_scc: fix compile warningTejun Heo2008-04-171-1/+1
| | | | | | | | | Missed one during mass conversion (dc14c0c5). Fix it. Spotted by Stephen Rothwell. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: isolate and rework cable logicAlan Cox2008-04-171-4/+44
| | | | | | Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata: SWNCQ should be enabled by defaultZoltan Boszormenyi2008-04-171-2/+2
| | | | | | | Signed-off-by: Zoltan Boszormenyi <zboszor@dunaweb.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_amd: fix sparse warningHarvey Harrison2008-04-171-1/+3
| | | | | | | | | | | | | | Current code is essentially choosing between dividing by 1 or dividing by two, make the conditions a little more obvious. As a bonus, removes a sparse error: drivers/ata/pata_amd.c:59:11: warning: symbol '__x' shadows an earlier one drivers/ata/pata_amd.c:59:11: originally declared here Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: kill ata_chk_status()Tejun Heo2008-04-178-29/+24
| | | | | | | | ata_chk_status() just calls ops->check_status and it only adds confusion with other status functions. Kill it. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: kill ata_chk_status() call from ata_dev_configure()Tejun Heo2008-04-171-3/+0
| | | | | | | | | | | ata_dev_configure() isn't tied to any controller interface except for the probe debug message printing at the end of the function. Kill the message. This is to help separating out SFF support from core layer. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: move ata_pci_default_filter() out of CONFIG_PCITejun Heo2008-04-172-13/+13
| | | | | | | | | ata_pci_default_filter() doesn't really have anything to do with PCI. It's generally applicable to BMDMA controllers. Move it out of CONFIG_PCI. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: reorganize SFF related stuffTejun Heo2008-04-174-2070/+2060
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Move SFF related functions from libata-core.c to libata-sff.c. ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(), ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(), ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(), ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(), sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(), ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(), ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(), atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(), ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(), ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(), ata_interrupt(), ata_std_ports() * Make ata_pio_queue_task() global as it's now called from libata-sff.c. * Move SFF related stuff in include/linux/libata.h and drivers/ata/libata.h into one place. While at it, move timing constants into the global enum definition and fortify comments a bit. This patch strictly moves stuff around and as such doesn't cause any functional difference. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: reorder functions in libata-sff.cTejun Heo2008-04-171-223/+220
| | | | | | | | | | | | Reorder functions in drivers/ata/libata-sff.c such that functions generally follow ops table order and init functions come last. This is in preparation of SFF cleanup. This patch strictly moves stuff around and as such doesn't cause any functional difference. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: drop ata_dev_select() from ata_dev_read_idTejun Heo2008-04-171-1/+0
| | | | | | | | | There is no reason to issue device select in read_id, it will be done by ops->qc_issue() when IDENTIFY[_PACKET] is issued via ata_exec_internal(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: make reset related methods proper port operationsTejun Heo2008-04-1737-502/+186
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently reset methods are not specified directly in the ata_port_operations table. If a LLD wants to use custom reset methods, it should construct and use a error_handler which uses those reset methods. It's done this way for two reasons. First, the ops table already contained too many methods and adding four more of them would noticeably increase the amount of necessary boilerplate code all over low level drivers. Second, as ->error_handler uses those reset methods, it can get confusing. ie. By overriding ->error_handler, those reset ops can be made useless making layering a bit hazy. Now that ops table uses inheritance, the first problem doesn't exist anymore. The second isn't completely solved but is relieved by providing default values - most drivers can just override what it has implemented and don't have to concern itself about higher level callbacks. In fact, there currently is no driver which actually modifies error handling behavior. Drivers which override ->error_handler just wraps the standard error handler only to prepare the controller for EH. I don't think making ops layering strict has any noticeable benefit. This patch makes ->prereset, ->softreset, ->hardreset, ->postreset and their PMP counterparts propoer ops. Default ops are provided in the base ops tables and drivers are converted to override individual reset methods instead of creating custom error_handler. * ata_std_error_handler() doesn't use sata_std_hardreset() if SCRs aren't accessible. sata_promise doesn't need to use separate error_handlers for PATA and SATA anymore. * softreset is broken for sata_inic162x and sata_sx4. As libata now always prefers hardreset, this doesn't really matter but the ops are forced to NULL using ATA_OP_NULL for documentation purpose. * pata_hpt374 needs to use different prereset for the first and second PCI functions. This used to be done by branching from hpt374_error_handler(). The proper way to do this is to use separate ops and port_info tables for each function. Converted. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: kill port_info->sht and ->irq_handlerTejun Heo2008-04-172-14/+17
| | | | | | | | | | | | | | | libata core layer doesn't care about sht or ->irq_handler. Those are only of interest to the LLD during initialization. This is confusing and has caused several drivers to have duplicate unused initializers for these fields. Currently only sata_nv uses these fields. Make sata_nv use ->private_data, which is supposed to carry LLD-specific information, instead and kill ->sht and ->irq_handler. nv_pi_priv structure is defined and struct literals are used to initialize private_data. Notational overhead is negligible. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: stop overloading port_info->private_dataTejun Heo2008-04-1739-145/+79
| | | | | | | | | | | | | | | | | | | | | | | | | | | port_info->private_data is currently used for two purposes - to record private data about the port_info or to specify host->private_data to use when allocating ata_host. This overloading is confusing and counter-intuitive in that port_info->private_data becomes host->private_data instead of port->private_data. In addition, port_info and host don't correspond to each other 1-to-1. Currently, the first non-NULL port_info->private_data is used. This patch makes port_info->private_data just be what it is - private_data for the port_info where LLD can jot down extra info. libata no longer sets host->private_data to the first non-NULL port_info->private_data, @host_priv argument is added to ata_pci_init_one() instead. LLDs which use ata_pci_init_one() can use this argument to pass in pointer to host private data. LLDs which don't should use init-register model anyway and can initialize host->private_data directly. Adding @host_priv instead of using init-register model for LLDs which use ata_pci_init_one() is suggested by Alan Cox. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
* libata: make ata_pci_init_one() not use ops->irq_handler and pi->shtTejun Heo2008-04-1739-130/+42
| | | | | | | | | | | | | | | | | | | ata_pci_init_one() is the only function which uses ops->irq_handler and pi->sht. Other initialization functions take the same information as arguments. This causes confusion and duplicate unused entries in structures. Make ata_pci_init_one() take sht as an argument and use ata_interrupt implicitly. All current users use ata_interrupt and if different irq handler is necessary open coding ata_pci_init_one() using ata_prepare_sff_host() and ata_activate_sff_host can be done under ten lines including error handling and driver which requires custom interrupt handler is likely to require custom initialization anyway. As ata_pci_init_one() was the last user of ops->irq_handler, this patch also kills the field. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: implement and use ops inheritanceTejun Heo2008-04-1773-2996/+523
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | libata lets low level drivers build ata_port_operations table and register it with libata core layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This becomes worse for drivers which support related similar controllers which differ slightly. They share most of the operations except for a few. However, the driver still needs to list all operations for each variant. This results in large number of duplicate entries, which is not only inefficient but also error-prone as it becomes very difficult to tell what the actual differences are. This duplicate boilerplates all over the low level drivers also make updating the core layer exteremely difficult and error-prone. When compounded with multi-branched development model, it ends up accumulating inconsistencies over time. Some of those inconsistencies cause immediate problems and fixed. Others just remain there dormant making maintenance increasingly difficult. To rectify the problem, this patch implements ata_port_operations inheritance. To allow LLDs to easily re-use their own ops tables overriding only specific methods, this patch implements poor man's class inheritance. An ops table has ->inherits field which can be set to any ops table as long as it doesn't create a loop. When the host is started, the inheritance chain is followed and any operation which isn't specified is taken from the nearest ancestor which has it specified. This operation is called finalization and done only once per an ops table and the LLD doesn't have to do anything special about it other than making the ops table non-const such that libata can update it. libata provides four base ops tables lower drivers can inherit from - base, sata, pmp, sff and bmdma. To avoid overriding these ops accidentaly, these ops are declared const and LLDs should always inherit these instead of using them directly. After finalization, all the ops table are identical before and after the patch except for setting .irq_handler to ata_interrupt in drivers which didn't use to. The .irq_handler doesn't have any actual effect and the field will soon be removed by later patch. * sata_sx4 is still using old style EH and currently doesn't take advantage of ops inheritance. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: implement and use SHT initializersTejun Heo2008-04-1772-1086/+133
| | | | | | | | | | | | | | | | libata lets low level drivers build scsi_host_template and register it to the SCSI layer. This allows low level drivers high level of flexibility but also burdens them with lots of boilerplate entries. This patch implements SHT initializers which can be used to initialize all the boilerplate entries in a sht. Three variants of them are implemented - BASE, BMDMA and NCQ - for different types of drivers. Note that entries can be overriden by putting individual initializers after the helper macro. All sht tables are identical before and after this patch. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: normalize port_info, port_operations and sht tablesTejun Heo2008-04-1729-60/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Over the time, port info, ops and sht structures developed quite a bit of inconsistencies. This patch updates drivers. * Enable/disable_pm callbacks added to all ahci ops tables. * Every driver for SFF controllers now uses ata_sff_port_start() instead of ata_port_start() unless the driver has custom implementation. * Every driver for SFF controllers now uses ata_pci_default_filter() unless the driver has custom implementation. * Removed an odd port_info->sht initialization from ata_piix.c. Likely a merge byproduct. * A port which has ATA_FLAG_SATA set doesn't need to set cable_detect to ata_cable_sata(). Remove it from via and mv port ops. * Some drivers had unnecessary .max_sectors initialization which is ignored and was missing .slave_destroy callback. Fixed. * Removed unnecessary sht initializations port_info's. * Removed onsolete scsi device suspend/resume callbacks from pata_bf54x. * No reason to set ata_pci_default_filter() and bmdma functions for PIO-only drivers. Remove those callbacks and replace ata_bmdma_irq_clear with ata_noop_irq_clear. * pata_platform sets port_start to ata_dummy_ret0. port_start can just be set to NULL. * sata_fsl supports NCQ but was missing qc_defer. Fixed. * pata_rb600_cf implements dummy port_start. Removed. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: implement and use ata_noop_irq_clear()Tejun Heo2008-04-1724-90/+47
| | | | | | | | | | | | | | ->irq_clear() is used to clear IRQ bit of a SFF controller and isn't useful for drivers which don't use libata SFF HSM implementation. However, it's a required callback and many drivers implement their own noop version as placeholder. This patch implements ata_noop_irq_clear and use it to replace those custom placeholders. Also, SFF drivers which don't support BMDMA don't need to use ata_bmdma_irq_clear(). It becomes noop if BMDMA address isn't initialized. Convert them to use ata_noop_irq_clear(). Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: reorganize ata_port_operationsTejun Heo2008-04-171-56/+61
| | | | | | | | Over the time, ops in ata_port_operations has become a bit confusing. Reorganize. SFF/BMDMA ops are separated into separate a group as they will be taken out of ata_port_operations later. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: PCI device should be powered up before being accessedTejun Heo2008-04-1719-20/+195
| | | | | | | | | | | | | | | | | | | | | | | | | | | PCI device should be powered up or powered up before its PCI regsiters are accessed. Although PCI configuration register access is allowed in D3hot, PCI device is free to reset its status when transiting from D3hot to D0 causing configuration data to change. Many libata SFF drivers which use ata_pci_init_one() read and update configuration registers before calling ata_pci_init_one() which enables the PCI device. Also, in resume paths, some drivers access registers without resuming the PCI device. This patch adds a call to pcim_enable_device() in init path if register is accessed before calling ata_pci_init_one() and make resume paths first resume PCI devices, access PCI configuration regiters then resume ATA host. While at it... * cmd640 was strange in that it set ->resume even when CONFIG_PM is not. This is by-product of minimal build fix. Updated. * In cs5530, Don't BUG() on reinit failure. Just whine and fail resume. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: kill ata_ehi_schedule_probe()Tejun Heo2008-04-175-16/+15
| | | | | | | | | | | | | | | | ata_ehi_schedule_probe() was created to hide details of link-resuming reset magic. Now that all the softreset workarounds are gone, scheduling probe is very simple - set probe_mask and request RESET. Kill ata_ehi_schedule_probe() and open code it. This also increases consistency as ata_ehi_schedule_probe() couldn't cover individual device probings so they were open-coded even when the helper existed. While at it, define ATA_ALL_DEVICES as mask of all possible devices on a link and always use it when requesting probe on link level for simplicity and consistency. Setting extra bits in the probe_mask doesn't hurt anybody. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: kill ATA_LFLAG_SKIP_D2H_BSYTejun Heo2008-04-175-19/+2
| | | | | | | | | | | | | | | | | | | | | | Some controllers can't reliably record the initial D2H FIS after SATA link is brought online for whatever reason. Advanced controllers which don't have traditional TF register based interface often have this problem as they don't really have the TF registers to update while the controller and link are being initialized. SKIP_D2H_BSY works around the problem by skipping the wait for device readiness before issuing SRST, so for such controllers libata issues SRST blindly and hopes for the best. Now that libata defaults to hardreset, this workaround is no longer necessary. For controllers which have support for hardreset, SRST is never issued by itself. It is only issued as follow-up SRST for device classification and PMP initialization, so there's no need to wait for it from prereset. Kill ATA_LFLAG_SKIP_D2H_BSY. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: kill ATA_EHI_RESUME_LINKTejun Heo2008-04-174-18/+8
| | | | | | | | | | | | | | ATA_EHI_RESUME_LINK has two functions - promote reset to hardreset if ATA_LFLAG_HRST_TO_RESUME is set and preventing EH from shortcutting reset action when probing is requested. The former is gone now and the latter can easily be achieved by making EH to perform at least one reset if reset is requested, which also makes more sense than depending on RESUME_LINK flag. As ATA_EHI_RESUME_LINK was the only EHI reset modifier, this also kills reset modifier handling. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: kill ATA_LFLAG_HRST_TO_RESUMETejun Heo2008-04-175-28/+1
| | | | | | | Now that hardreset is the preferred method of resetting, there's no need for ATA_LFLAG_HRST_TO_RESUME flag. Kill it. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: prefer hardresetTejun Heo2008-04-1711-168/+101
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When both soft and hard resets are available, libata preferred softreset till now. The logic behind it was to be softer to devices; however, this doesn't really help much. Rationales for the change: * BIOS may freeze lock certain things during boot and softreset can't unlock those. This by itself is okay but during operation PHY event or other error conditions can trigger hardreset and the device may end up with different configuration. For example, after a hardreset, previously unlockable HPA can be unlocked resulting in different device size and thus revalidation failure. Similar condition can occur during or after resume. * Certain ATAPI devices require hardreset to recover after certain error conditions. On PATA, this is done by issuing the DEVICE RESET command. On SATA, COMRESET has equivalent effect. The problem is that DEVICE RESET needs its own execution protocol. For SFF controllers with bare TF access, it can be easily implemented but more advanced controllers (e.g. ahci and sata_sil24) require specialized implementations. Simply using hardreset solves the problem nicely. * COMRESET initialization sequence is the norm in SATA land and many SATA devices don't work properly if only SRST is used. For example, some PMPs behave this way and libata works around by always issuing hardreset if the host supports PMP. Like the above example, libata has developed a number of mechanisms aiming to promote softreset to hardreset if softreset is not going to work. This approach is time consuming and error prone. Also, note that, dependingon how you read the specs, it could be argued that PMP fan-out ports require COMRESET to start operation. In fact, all the PMPs on the market except one don't work properly if COMRESET is not issued to fan-out ports after PMP reset. * COMRESET is an integral part of SATA connection and any working device should be able to handle COMRESET properly. After all, it's the way to signal hardreset during reboot. This is the most used and recommended (at least by the ahci spec) method of resetting devices. So, this patch makes libata prefer hardreset over softreset by making the following changes. * Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is now only used to tell prereset whether soft or hard reset will be issued. * Strip out now unneeded promote-to-hardreset logics from ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and other places. Signed-off-by: Tejun Heo <htejun@gmail.com>
* Linux 2.6.25v2.6.25Linus Torvalds2008-04-161-1/+1
|
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds2008-04-167-36/+13
|\ | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: it821x: do not describe noraid parameter with its value Pb1200/DBAu1200: fix bad IDE resource size Au1200: IDE driver build fix Au1200: kill IDE driver function prototypes avr32 mustn't select HAVE_IDE
| * it821x: do not describe noraid parameter with its valuePaul Bolle2008-04-171-1/+1
| | | | | | | | | | | | | | Describe noraid parameter with its name (and not its value). Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * Pb1200/DBAu1200: fix bad IDE resource sizeSergei Shtylyov2008-04-174-8/+9
| | | | | | | | | | | | | | | | | | | | | | | | The header files for the Pb1200/DBAu1200 boards have wrong definition for the IDE interface's decoded range length -- it should be 512 bytes according to what the IDE driver does. In addition, the IDE platform device claims 1 byte too many for its memory resource -- fix the platform code and the IDE driver in accordance. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * Au1200: IDE driver build fixSergei Shtylyov2008-04-171-8/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver fails to compile with CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA enabled: drivers/ide/mips/au1xxx-ide.c: In function `auide_build_dmatable': drivers/ide/mips/au1xxx-ide.c:256: error: implicit declaration of function `sg_virt' drivers/ide/mips/au1xxx-ide.c:275: error: implicit declaration of function `sg_next' drivers/ide/mips/au1xxx-ide.c:275: warning: assignment makes pointer from integer without a cast Fix this by including <linux/scatterlist.h>. While at it, remove the #include's without which the driver happily builds. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * Au1200: kill IDE driver function prototypesSergei Shtylyov2008-04-172-18/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix these warnings emitted when compiling drivers/ide/mips/au1xxx-ide.c: include/asm/mach-au1x00/au1xxx_ide.h:137: warning: 'auide_tune_drive' declared `static' but never defined include/asm/mach-au1x00/au1xxx_ide.h:138: warning: 'auide_tune_chipset' declared `static' but never defined by wiping out the whole "function prototyping" section from the header file <asm-mips/mach-au1x00/au1xxx_ide.h> as it mostly declared functions that are already dead in the IDE driver; move the only useful prototype into the driver. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * avr32 mustn't select HAVE_IDEAdrian Bunk2008-04-171-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a libata based PATA driver for avr32, but no support for drivers/ide/ on avr32. This patch fixes the following compile error: <-- snip --> ... CC [M] drivers/ide/ide-cd.o In file included from /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/ide/ide-cd.c:37: /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/ide.h:209:21: error: asm/ide.h: No such file or directory make[3]: *** [drivers/ide/ide-cd.o] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-04-162-2/+4
|\ \ | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: update git url for blktrace io context: increment task attachment count in ioc_task_link()
| * | block: update git url for blktraceJens Axboe2008-04-151-1/+1
| | | | | | | | | | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | io context: increment task attachment count in ioc_task_link()Jens Axboe2008-04-151-1/+3
| | | | | | | | | | | | | | | | | | Thanks to Nikanth Karthikesan <knikanth@suse.de> for reporting this. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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