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* ata: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0
| | | | | | | A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host driversBartlomiej Zolnierkiewicz2014-05-091-1/+1
| | | | | | | | | | | | | | | | | | | | This patch fixes host drivers to use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable. Benefits of this change: * unused code is not being compiled in for CONFIG_PM=y, CONFIG_PM_SLEEP=n and CONFIG_PM_RUNTIME=y configurations * easier transition to use struct dev_pm_ops and SIMPLE_DEV_PM_OPS() in the future * more consistent code (there are host drivers which are using the correct CONFIG_PM_SLEEP checks already) The patch leaves the core libata code and ->port_[suspend,resume] support in sata_[inic162x,nv,sil24].c alone for now. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* ata: use platform_{get,set}_drvdata()Jingoo Han2013-05-241-6/+4
| | | | | | | | | | | | Use the wrapper functions for getting and setting the driver data using platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev, so we can directly pass a struct platform_device. Also, unnecessary dev_set_drvdata() is removed, because the driver core clears the driver data to NULL after device_release or on probe failure. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* Drivers: ata: remove __dev* attributes.Greg Kroah-Hartman2013-01-031-3/+3
| | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Viresh Kumar <viresh.linux@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* [libata] pata_bf54x: Support sg list in bmdma transfer.Sonic Zhang2012-01-171-79/+88
| | | | | | | | BF54x on-chip ATAPI controller allows maximum 0x1fffe bytes to be transfered in one ATAPI transfer. So, set the max sg_tablesize to 4. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_bf54x: fix BMIDE status register emulationSergei Shtylyov2012-01-081-18/+2
| | | | | | | | | | | | | | | | | The author of this driver clearly wasn't familiar with the BMIDE specification (also known as SFF-8038i) when he implemented the bmdma_status() method: first, the interrupt bit of the BMIDE status register corresponds to nothing else but INTRQ signal (ATAPI_DEV_INT here); second, the error bit is only set if the controller encounters issue doing the bus master transfers, not on the IDE DMA burst termination interrupts like here (moreover, setting the error bit doesn't cause an interrupt). We now need to disable all those unused interrupts... (The only thing I couldn't figure out is how to flush the FIFO to memory once the interrupt happens as required by the mentioned spec.) Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level>Joe Perches2011-07-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Saves text by removing nearly duplicated text format strings by creating ata_<foo>_printk functions and printf extension %pV. ata defconfig size shrinks ~5% (~8KB), allyesconfig ~2.5% (~13KB) Format string duplication comes from: #define ata_link_printk(link, lv, fmt, args...) do { \ if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ (link)->pmp , ##args); \ else \ printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ } while(0) Coalesce long formats. $ size drivers/ata/built-in.* text data bss dec hex filename 544969 73893 116584 735446 b38d6 drivers/ata/built-in.allyesconfig.ata.o 558429 73893 117864 750186 b726a drivers/ata/built-in.allyesconfig.dev_level.o 141328 14689 4220 160237 271ed drivers/ata/built-in.defconfig.ata.o 149567 14689 4220 168476 2921c drivers/ata/built-in.defconfig.dev_level.o Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* libata: remove ATA_FLAG_NO_LEGACYSergei Shtylyov2011-03-021-2/+1
| | | | | | | | | | | All checks of ATA_FLAG_NO_LEGACY have been removed by the commits c791c30670ea61f19eec390124128bf278e854fe ([libata] minor PCI IDE probe fixes and cleanups) and f0d36efdc624beb3d9e29b9ab9e9537bf0f25d5b (libata: update libata core layer to use devres), so I think it's time to finally get rid of this flag... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: remove ATA_FLAG_MMIOSergei Shtylyov2011-03-021-1/+0
| | | | | | | | | Commit 0d5ff566779f894ca9937231a181eb31e4adff0e (libata: convert to iomap) removed all checks of ATA_FLAG_MMIO but neglected to remove the flag itself. Do it now, at last... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Merge branch 'for-next' of ↵Linus Torvalds2010-10-241-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Update broken web addresses in arch directory. Update broken web addresses in the kernel. Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget Revert "Fix typo: configuation => configuration" partially ida: document IDA_BITMAP_LONGS calculation ext2: fix a typo on comment in ext2/inode.c drivers/scsi: Remove unnecessary casts of private_data drivers/s390: Remove unnecessary casts of private_data net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data drivers/infiniband: Remove unnecessary casts of private_data drivers/gpu/drm: Remove unnecessary casts of private_data kernel/pm_qos_params.c: Remove unnecessary casts of private_data fs/ecryptfs: Remove unnecessary casts of private_data fs/seq_file.c: Remove unnecessary casts of private_data arm: uengine.c: remove C99 comments arm: scoop.c: remove C99 comments Fix typo configue => configure in comments Fix typo: configuation => configuration Fix typo interrest[ing|ed] => interest[ing|ed] Fix various typos of valid in comments ... Fix up trivial conflicts in: drivers/char/ipmi/ipmi_si_intf.c drivers/usb/gadget/rndis.c net/irda/irnet/irnet_ppp.c
| * fix printk typo 'faild'Paul Bolle2010-08-091-1/+1
| | | | | | | | | | Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | pata_bf54x: fix return type of bfin_set_devctlMike Frysinger2010-10-211-1/+1
| | | | | | | | | | | | | | | | | | The new devctl func added for us to the driver has the wrong return type. Which is to say there shouldn't be any. This fixes compile time warnings as there shouldn't be any runtime difference. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | libata: add @ap to ata_wait_register() and introduce ata_msleep()Tejun Heo2010-10-211-2/+2
|/ | | | | | | | | | | Add optional @ap argument to ata_wait_register() and replace msleep() calls with ata_msleep() which take optional @ap in addition to the duration. These will be used to implement EH exclusion. This patch doesn't cause any behavior difference. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata-sff: ata_sff_irq_clear() is BMDMA specificTejun Heo2010-05-251-1/+1
| | | | | | | | | | | | | ata_sff_irq_clear() is BMDMA specific. Rename it to ata_bmdma_irq_clear(), move it to ata_bmdma_port_ops and make ->sff_irq_clear() optional. Note: ata_bmdma_irq_clear() is actually only needed by ata_piix and possibly by sata_sil. This should be moved to respective low level drivers later. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata-sff: clean up BMDMA initializationTejun Heo2010-05-191-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When BMDMA initialization failed or BMDMA was not available for whatever reason, bmdma_addr was left at zero and used as an indication that BMDMA shouldn't be used. This leads to the following problems. p1. For BMDMA drivers which don't use traditional BMDMA register, ata_bmdma_mode_filter() incorrectly inhibits DMA modes. Those drivers either have to inherit from ata_sff_port_ops or clear ->mode_filter explicitly. p2. non-BMDMA drivers call into BMDMA PRD table allocation. It doesn't actually allocate PRD table if bmdma_addr is not initialized but is still confusing. p3. For BMDMA drivers which don't use traditional BMDMA register, some methods might not be invoked as expected (e.g. bmdma_stop from ata_sff_post_internal_cmd()). p4. SFF drivers w/ custom DMA interface implement noop BMDMA ops worrying libata core might call into one of them. These problems are caused by the muddy line between SFF and BMDMA and the assumption that all BMDMA controllers initialize bmdma_addr. This patch fixes p1 and p2 by removing the bmdma_addr assumption and moving prd allocation to BMDMA port start. Later patches will fix the remaining issues. This patch improves BMDMA initialization such that * When BMDMA register initialization fails, falls back to PIO instead of failing. ata_pci_bmdma_init() never fails now. * When ata_pci_bmdma_init() falls back to PIO, it clears ap->mwdma_mask and udma_mask instead of depending on ata_bmdma_mode_filter(). This makes ata_bmdma_mode_filter() unnecessary thus resolving p1. * ata_port_start() which actually is BMDMA specific is moved to ata_bmdma_port_start(). ata_port_start() and ata_sff_port_start() are killed. * ata_sff_port_start32() is moved and renamed to ata_bmdma_port_start32(). Drivers which no longer call into PRD table allocation are... pdc_adma, sata_inic162x, sata_qstor, sata_sx4, pata_cmd640 and all drivers which inherit from ata_sff_port_ops. pata_icside sets ->port_start to ATA_OP_NULL as it doesn't need PRD but is a BMDMA controller and doesn't have custom port_start like other such controllers. Note that with the previous patch which makes all and only BMDMA drivers inherit from ata_bmdma_port_ops, this change doesn't break drivers which need PRD table. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata-sff: clean up inheritance in several driversTejun Heo2010-05-191-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | 1. pata_cmd640 is PIO only. Inherit from sff. 2. pata_macio is BMDMA. Inherit from bmdma and drop explicit bmdma_mode_filter() setting. 3. In sata_mv, unlike mv5, mv6 is BMDMA. Inherit from bmdma and don't clear ->post_internal_cmd(). 4. bf54x and icside are quasi-BMDMA controllers which don't use the standard BMDMA registers so they don't initialize bmdma_addr and inherit from sff to avoid the default mode_filter which disables DMA modes if bmdma_addr is not initialized. For 2 and 3, this patch makes the drivers explicitly specify ->mode_filter to ATA_OP_NULL while inheriting from ata_bmdma_port_ops. These will be removed by the next patch. This patch makes all and only BMDMA drivers inherit from ata_bmdma_port_ops to ease further SFF/BMDMA separation. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: kill ATA_FLAG_DISABLEDTejun Heo2010-05-171-11/+5
| | | | | | | | | | | | | | | | | | | | ATA_FLAG_DISABLED is only used by drivers which don't use ->error_handler framework and is largely broken. Its only meaningful function is to make irq handlers skip processing if the flag is set, which is largely useless and even harmful as it makes those ports more likely to cause IRQ storms. Kill ATA_FLAG_DISABLED and makes the callers disable attached devices instead. ata_port_probe() and ata_port_disable() which manipulate the flag are also killed. This simplifies condition check in IRQ handlers. While updating IRQ handlers, remove ap NULL check as libata guarantees consecutive port allocation (unoccupied ports are initialized with dummies) and long-obsolete ATA_QCFLAG_ACTIVE check (checked by ata_qc_from_tag()). Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: make sff_irq_on() method optionalSergei Shtylyov2010-05-141-27/+2
| | | | | | | | | | | | | | | | | | | Now, with the introduction of the sff_set_devctl() method, we can use it in sff_irq_on() method too -- that way its implementations in 'pata_bf54x' and 'pata_scc' become virtually identical to ata_sff_irq_on(). The sff_irq_on() method now becomes quite superfluous, and the only reason not to remove it completely is the existence of the 'pata_octeon_cf' driver which implements it as an empty function. Just make the method optional then, with ata_sff_irq_on() becoming generic taskfile-bound function, still global for the 'pata_bf54x' driver to be able to call it from its thaw() and postreset() methods. While at it, make the sff_irq_on() method and ata_sff_irq_on() return 'void' as the result is always ignored anyway. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: introduce sff_set_devctl() methodSergei Shtylyov2010-05-141-27/+13
| | | | | | | | | | | | | | | | | | | | The set of libata's taskfile access methods is clearly incomplete as it lacks a method to write to the device control register -- which forces drivers like 'pata_bf54x' and 'pata_scc' to implement more "high level" (and more weighty) methods like freeze() and postreset(). So, introduce the optional sff_set_devctl() method which the drivers only have to implement if the standard iowrite8() can't be used (just like the existing sff_check_altstatus() method) and make use of it in the freeze() and postreset() method implementations (I could also have used it in softreset() method but it also reads other taskfile registers without using tf_read() making that quite pointless); this makes freeze() method implementations in the 'pata_bf54x' and 'pata_scc' methods virtually identical to ata_sff_freeze(), so we can get rid of them completely. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_bf54x: handle portmuxing of pins through GPIO PORTsSonic Zhang2009-12-211-0/+19
| | | | | | | | | | | | By default, the PATA pins are routed to the async address lines in which case, no peripheral muxing needs to be done. However, if the pins get routed through the GPIO PORTs pins, we need to make sure to request them so that the muxing is properly set up. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] convert drivers to use ata.h mode mask definesErik Inge Bolsø2009-03-241-1/+1
| | | | | | | No functional changes in this patch. Signed-off-by: Erik Inge Bolsø <knan-lkml@anduin.net> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] Update kernel-doc comments to match source codeQinghuang Feng2008-12-281-1/+0
| | | | Signed-off-by: Qinghuang Feng <qhfeng.kernel@gmail.com>
* [libata] pata_bf54x: Add proper PM operationSonic Zhang2008-09-291-7/+27
| | | | | | | | | [akpm@linux-foundation.org: remove ifdefs, make things static] Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: consistently use msecs for time durationsTejun Heo2008-07-141-3/+3
| | | | | | | | | | | | | | | | libata has been using mix of jiffies and msecs for time druations. This is getting confusing. As writing sub HZ values in jiffies is PITA and msecs_to_jiffies() can't be used as initializer, unify unit for all time durations to msecs. So, durations are in msecs and deadlines are in jiffies. ata_deadline() is added to compute deadline from a start time and duration in msecs. While at it, drop now superflous _msec suffix from arguments and rename @timeout to @deadline if it represents a fixed point in time rather than duration. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata-bf54x: Set ATAPI HSM to control IDE device terminate sequence.Sonic Zhang2008-05-191-1/+4
| | | | | | | | | | | | Set ATAPI host state machine to control IDE device terminate sequence. Some IDE harddisk may assert terminate sequence in the middle of a formal DMA transaction and resume later. Bit DETECT_TERM in ATAPI_CTRL register determines whether the ATAPI host state machine or the kernel driver should take care of this case. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Fix bug - Implement bfin ata interrupt handler to avoid "irq 68 nobody ↵Sonic Zhang2008-04-291-4/+120
| | | | | | | | | | | | | | | cared" (v2) Return IRQ_HANDLED when bfin ata device is busy. http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3513 v1-v2: - fold api breakage fixing patch together. - mark 'static', not 'inline'. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_bf54x: decrease count first.Roel Kluin2008-04-251-1/+1
| | | | | | | | | | | When count reaches 0 the postfix decrement still subtracts (to -1), so bfin_reset_controller() returns as if the busy flag was cleared while it was not. Signed-off-by: Roel Kluin <12o3l@tiscali.nl> Acked-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ATA/IDE: fix platform driver hotplug/coldplugKay Sievers2008-04-251-0/+1
| | | | | | | | | | | | | | | | | | | Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable ATA and IDE platform drivers, to re-enable auto loading. NOTE: both ata/pata_platform.c and ide/legacy/ide_platform.c claim to provide "the" platform_pata driver, and there's no build-time mutual exclusion mechanism. This means that configs which enable both drivers will make some trouble when hotplugging... [dbrownell@users.sourceforge.net: more drivers, registration fixes] Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Tejun Heo <htejun@gmail.com> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: move link onlineness check out of softreset methodsTejun Heo2008-04-171-6/+0
| | | | | | | | | | | | | | | | | | | Currently, SATA softresets should do link onlineness check before actually performing SRST protocol but it doesn't really belong to softreset. This patch moves onlineness check in softreset to ata_eh_reset() and ata_eh_followup_srst_needed() to clean up code and help future sata_mv changes which need clear separation between SCR and TF accesses. sata_fsl is peculiar in that its softreset really isn't softreset but combination of hardreset and softreset. This patch adds dummy private ->prereset to keep the current behavior but the driver really should implement separate hard and soft resets and return -EAGAIN from hardreset if it should be follwed by softreset. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: rename SFF port opsTejun Heo2008-04-171-10/+10
| | | | | | | | | | Add sff_ prefix to SFF specific port ops. This rename is in preparation of separating SFF support out of libata core layer. This patch strictly renames ops and doesn't introduce any behavior difference. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: rename SFF functionsTejun Heo2008-04-171-42/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SFF functions have confusing names. Some have sff prefix, some have bmdma, some std, some pci and some none. Unify the naming by... * SFF functions which are common to both BMDMA and non-BMDMA are prefixed with ata_sff_. * SFF functions which are specific to BMDMA are prefixed with ata_bmdma_. * SFF functions which are specific to PCI but apply to both BMDMA and non-BMDMA are prefixed with ata_pci_sff_. * SFF functions which are specific to PCI and BMDMA are prefixed with ata_pci_bmdma_. * Drop generic prefixes from LLD specific routines. For example, bfin_std_dev_select -> bfin_dev_select. The following renames are noteworthy. ata_qc_issue_prot() -> ata_sff_qc_issue() ata_pci_default_filter() -> ata_bmdma_mode_filter() ata_dev_try_classify() -> ata_sff_dev_classify() This rename is in preparation of separating SFF support out of libata core layer. This patch strictly renames functions and doesn't introduce any behavior difference. Signed-off-by: Tejun Heo <htejun@gmail.com>
* libata: kill ata_chk_status()Tejun Heo2008-04-171-1/+1
| | | | | | | | 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: make reset related methods proper port operationsTejun Heo2008-04-171-12/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: implement and use ops inheritanceTejun Heo2008-04-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Heo2008-04-171-13/+1
| | | | | | | | | | | | | | | | 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 Heo2008-04-171-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* Blackfin pata-bf54x driver: fix compiling bug - no ata_port struct in struct ↵Bryan Wu2008-02-011-3/+3
| | | | | | | | ata_device any more Cc: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Blackfin pata-bf54x driver: should cover all possible interrupt sourcesSonic Zhang2008-02-011-7/+5
| | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Blackfin pata-bf54x driver: Add debug informationSonic Zhang2008-02-011-18/+19
| | | | | | | | Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Blackfin pata-bf54x driver: Remove obsolete PM functionSonic Zhang2008-02-011-4/+0
| | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: convert to chained sgTejun Heo2008-01-231-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | libata used private sg iterator to handle padding sg. Now that sg can be chained, padding can be handled using standard sg ops. Convert to chained sg. * s/qc->__sg/qc->sg/ * s/qc->pad_sgent/qc->extra_sg[]/. Because chaining consumes one sg entry. There need to be two extra sg entries. The renaming is also for future addition of other extra sg entries. * Padding setup is moved into ata_sg_setup_extra() which is organized in a way that future addition of other extra sg entries is easy. * qc->orig_n_elem is unused and removed. * qc->n_elem now contains the number of sg entries that LLDs should map. qc->mapped_n_elem is added to carry the original number of mapped sgs for unmapping. * The last sg of the original sg list is used to chain to extra sg list. The original last sg is pointed to by qc->last_sg and the content is stored in qc->saved_last_sg. It's restored during ata_sg_clean(). * All sg walking code has been updated. Unnecessary assertions and checks for conditions the core layer already guarantees are removed. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: update ->data_xfer hook for ATAPITejun Heo2008-01-231-13/+15
| | | | | | | | | | | | | | | | | Depending on how many bytes are transferred as a unit, PIO data transfer may consume more bytes than requested. Knowing how much data is consumed is necessary to determine how much is left for draining. This patch update ->data_xfer such that it returns the number of consumed bytes. While at it, it also makes the following changes. * s/adev/dev/ * use READ/WRITE constants for rw indication * misc clean ups Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] pata_bf54x: checkpatch fixesAndrew Morton2008-01-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: line over 80 characters #36: FILE: drivers/ata/pata_bf54x.c:1512: + while (bfin_port_info[board_idx].udma_mask>0 && udma_fsclk[udma_mode] > fsclk) { ERROR: need spaces around that '>' (ctx:VxV) #36: FILE: drivers/ata/pata_bf54x.c:1512: + while (bfin_port_info[board_idx].udma_mask>0 && udma_fsclk[udma_mode] > fsclk) { ^ total: 1 errors, 1 warnings, 19 lines checked Your patch has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Jeff Garzik <jeff@garzik.org> Cc: Sonic Zhang <sonic.zhang@analog.com> Cc: Tejun Heo <htejun@gmail.com> Cc: sonic zhang <sonic.adi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Set proper ATA UDMA mode for bf548 according to system clock.sonic zhang2007-12-011-0/+7
| | | | | | | | | | | | UDMA Mode - Frequency compatibility UDMA5 - 100 MB/s - SCLK = 133 MHz UDMA4 - 66 MB/s - SCLK >= 80 MHz UDMA3 - 44.4 MB/s - SCLK >= 50 MHz UDMA2 - 33 MB/s - SCLK >= 40 MHz Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Return proper ATA INT status in pata_bf54x driversonic zhang2007-11-261-3/+3
| | | | | | | INT status can be OR. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Update libata driver for bf548 atapi controller against the 2.6.24 tree.Sonic Zhang2007-10-171-40/+37
| | | | | | | | | | | Changes: 1. Remove irq_ack() and port_disable() methods 2. Acocomodate for the libata-link patches 3. Change Kconfig ATAPI mode option into a module param. 4. Add supported WMDMA mode. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata driver for bf548 on chip ATAPI controller.Sonic Zhang2007-10-121-0/+1627
Fix all issues pointed out in Jeff's email. Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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