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* libata-sff: handle controllers w/o ctl registerTejun Heo2008-03-10
| | | | | | | | | | | SFF incorrectly assumed that ctl register is available for all controllers while some old SFF controllers don't have ctl register. Make SFF handle controllers w/o ctl register by conditionalizing ctl register access and softreset method. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: factor out ata_pci_activate_sff_host() from ata_pci_one()Tejun Heo2008-01-23
| | | | | | | | | | | | Factor out ata_pci_activate_sff_host() from ata_pci_one(). This does about the same thing as ata_host_activate() but needs to be separate because SFF controllers use different and multiple IRQs in legacy mode. This will be used to make SFF LLD initialization more flexible. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: use dev_driver_string() instead of "libata" in libata-sff.cTejun Heo2008-01-23
| | | | | | | | | libata-sff code used DRV_NAME which is hardcoded to "libata" when requesting resources. Use dev_driver_string() such that low level driver names are used in resource listing. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: rename ATA_PROT_ATAPI_* to ATAPI_PROT_*Tejun Heo2008-01-23
| | | | | | | | | ATA_PROT_ATAPI_* are ugly and naming schemes between ATA_PROT_* and ATA_PROT_ATAPI_* are inconsistent causing confusion. Rename them to ATAPI_PROT_* and make them consistent with ATA counterpart. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata-sff: tf_loadAlan Cox2008-01-23
| | | | | | | | | Jeff said he preferred that the SFF tf_load followed the spec and we documented that anyone who needed different overrode it, rather than it using the ->check_status methods. No driver relies on the current behaviour. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-sff: PCI IRQ handling fixAlan Cox2008-01-10
| | | | | | | | | It is legitimate (although annoying and silly) for a PCI IDE controller not to be assigned an interrupt and to be polled. The libata-sff code should therefore not try and request IRQ 0 in this case. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] checkpatch-inspired cleanupsJeff Garzik2007-10-23
| | | | | | | | | | | | Tackle the relatively sane complaints of checkpatch --file. The vast majority is indentation and whitespace changes, the rest are * #include fixes * printk KERN_xxx prefix addition * BSS/initializer cleanups Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Fix misspellings of "system", "controller", "interrupt" and "necessary".Robert P. J. Day2007-10-19
| | | | | | | | Fix the various misspellings of "system", controller", "interrupt" and "[un]necessary". Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* Merge branch 'upstream-linus' of ↵Linus Torvalds2007-10-18
|\ | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev: [libata] kill ata_sg_is_last() Update libata driver for bf548 atapi controller against the 2.6.24 tree. libata-sff: Correct use of check_status() drivers/ata: add support to Freescale 3.0Gbps SATA Controller pata_acpi: fix build breakage if !CONFIG_PM
| * libata-sff: Correct use of check_status()Alan Cox2007-10-17
| | | | | | | | | | | | | | | | | | | | | | | | ata_check_status() does an SFF compliant check ata_chk_status() does a generic call to ap->ops->check_status (usually ata_check_status) libata-sff uses the wrong one. Hardly suprising given the naming here, which ought to get fixed to ata_sff_check_status() perhaps ? Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | sparse pointer use of zero as nullStephen Hemminger2007-10-18
|/ | | | | | | | | | | | | | | | | Get rid of sparse related warnings from places that use integer as NULL pointer. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Andi Kleen <ak@suse.de> Cc: Jeff Garzik <jeff@garzik.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Ian Kent <raven@themaw.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* libata: implement and use ata_port_desc() to report port configurationTejun Heo2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, port configuration reporting has the following problems. * iomapped address is reported instead of raw address * report contains irrelevant fields or lacks necessary fields for non-SFF controllers. * host->irq/irq2 are there just for reporting and hacky. This patch implements and uses ata_port_desc() and ata_port_pbar_desc(). ata_port_desc() is almost identical to ata_ehi_push_desc() except that it takes @ap instead of @ehi, has no locking requirement, can only be used during host initialization and " " is used as separator instead of ", ". ata_port_pbar_desc() is a helper to ease reporting of a PCI BAR or an offsetted address into it. LLD pushes whatever description it wants using the above two functions. The accumulated description is printed on host registration after "[S/P]ATA max MAX_XFERMODE ". SFF init helpers and ata_host_activate() automatically add descriptions for addresses and irq respectively, so only LLDs which isn't standard SFF need to add custom descriptions. In many cases, such controllers need to report different things anyway. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Remove ->irq_ack() hook, and ata_dummy_irq_on()Jeff Garzik2007-10-12
| | | | | | | | | | | | | * ->irq_ack() is redundant to what the irq handler already performs... chk-status + irq-clear. Furthermore, it is only called in one place, when screaming-irq-debugging is enabled, so we don't want to bother with a hook just for that. * ata_dummy_irq_on() is only ever used in drivers that have no callpath reaching ->irq_on(). Remove .irq_on hook from those drivers, and the now-unused ata_dummy_irq_on() Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-link: linkify PHY-related functionsTejun Heo2007-10-12
| | | | | | | | | | | | | | | | | Make the following PHY-related functions to deal with ata_link instead of ata_port. * sata_print_link_status() * sata_down_spd_limit() * ata_set_sata_spd_limit() and friends * sata_link_debounce/resume() * sata_scr_valid/read/write/write_flush() * ata_link_on/offline() This patch introduces no behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-link: introduce ata_linkTejun Heo2007-10-12
| | | | | | | | | | | | | | | | | | | Introduce ata_link. It abstracts PHY and sits between ata_port and ata_device. This new level of abstraction is necessary to support SATA Port Multiplier, which basically adds a bunch of links (PHYs) to a ATA host port. Fields related to command execution, spd_limit and EH are per-link and thus moved to ata_link. This patch only defines the host link. Multiple link handling will be added later. Also, a lot of ap->link derefences are added but many of them will be removed as each part is converted to deal directly with ata_link instead of ata_port. This patch introduces no behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-sff: Fix documentationAlan Cox2007-09-20
| | | | | | | | Code moved to ioread/iowrite but the comment didn't Also note a posting issue Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-sff; Unbreak non DMA capable controllers againAlan Cox2007-08-01
| | | | | | | | | | | Seems nobody else is checking/testing this case as it keeps getting horked. If we have no BAR4 mapping on an SFF controller this is *NOT* an error, it just means it isn't doing BMDMA. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Fix reported task file values in sense dataPetr Vandrovec2007-07-20
| | | | | | | | | | | | | | ata_tf_read was setting HOB bit when lba48 command was submitted, but was not clearing it before reading "normal" data. As it is only place which sets HOB bit in control register, and register reads should not be affected by other bits, let's just clear it when we are done with reading upper bytes so non-48bit commands do not have to touch ctl at all. pata_scc suffered from same problem... Signed-off-by: Petr Vandrovec <petr@vandrovec.name> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Correct comment in libata-sff.cDave Jones2007-07-20
| | | | | | | The filename in the file header is incorrect. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: simplify PCI legacy SFF host handlingTejun Heo2007-07-10
| | | | | | | | | | | | | | With PCI resource fix up for legacy hosts. We can use the same code path to allocate IO resources and initialize host for both legacy and native SFF hosts. Only IRQ requesting needs to be different. Rename ata_pci_*_native_host() to ata_pci_*_sff_host(), kill all legacy specific functions and use the renamed functions instead. This simplifies code a lot. 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: fix assigned IRQ reportingTejun Heo2007-07-03
| | | | | | | | | | | | | | host->irq and host->irq2 should be set before ata_host_register() for IRQ reporting to work. Move up host->irq assignment in ata_host_activate() and add it to ata_pci_init_one() native path and pata_cs5520. The port info printing in ata_host_register() doesn't fit all the different controllers. It should probably be moved out to LLDs with some helpers in the future. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-core/sff: Fix multiple assumptions about DMAAlan Cox2007-06-09
| | | | | | | | | | | | | | | The ata IRQ ack functions are only used when debugging. Unfortunately almost every controller that calls them can cause crashes in some configurations as there are missing checks for bmdma presence. In addition ata_port_start insists of installing DMA buffers and pad buffers for controllers regardless. The SFF controllers actually need to make that decision dynamically at controller setup time and all need the same helper - so we add ata_sff_port_start. Future patches will switch the SFF drivers to use this. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: clean up SFF init messTejun Heo2007-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: honour host controllers that want just one hostLinus Torvalds2007-04-30
| | | | | | | | | | | | | | | | | | | | The Marvell IDE interface on my machine would hit a BUG_ON() in lib/iomem.c because it was calling ata_pci_init_one() specifying just a single port on the host, but that would actually end up trying to initialize two ports, the second one with bogus information. This fixes "ata_pci_init_one()" so that it actually passes down the n_ports variable that it got from the low-level driver to the host allocation routine ("ata_host_alloc_pinfo()"), which results in the ATA layer actually having the correct port number information. And in order to make it all work, I also needed to fix a few places that had incorrectly hard-coded the fact that a host always had exactly two ports (both ata_pci_init_bmdma() and ata_request_legacy_irqs() would just always iterate over both ports). Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* libata: kill probe_ent and related helpersTejun Heo2007-04-28
| | | | | | | | All drivers are converted to new init model. Kill probe_ent, ata_device_add() and ata_pci_init_native_mode(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: add init helpers including ata_pci_prepare_native_host()Tejun Heo2007-04-28
| | | | | | | | | | | | | | | | | | | These will be used to convert LLDs to new init model. * Add irq_handler field to port_info. In new init model, requesting IRQ is LLD's responsibility and libata doesn't need to know about irq_handler. Most LLDs can simply register their irq_handler but some need different irq_handler depending on specific chip. The added port_info->irq_handler field can be used by LLDs to select the matching IRQ handler in such cases. * Add ata_dummy_port_info. * Implement ata_pci_prepare_native_host(), a helper to alloc ATA host, acquire all resources and init the host in one go. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: convert native PCI host handling to new init modelTejun Heo2007-04-28
| | | | | | | | | | | | | Convert native PCI host handling to alloc-init-register model. New function ata_pci_init_native_host() follows the new init model and replaces ata_pci_init_native_mode(). As there are remaining LLD users, the old function isn't removed yet. ata_pci_init_one() is reimplemented using the new function and now fully converted to new init model. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: convert legacy PCI host handling to new init modelTejun Heo2007-04-28
| | | | | | | | | | | | | | | | | | Convert legacy PCI host handling to alloc-init-register model. ata_init_legacy_host(), ata_request_legacy_irqs() and ata_pci_init_bmdma() are separated out and follow the new init model. The two legacy handling functions use separate ata_legacy_devres instead of generic devm_* resources. This reduces devres overhead for legacy hosts which was a bit high because it didn't use PCI/iomap merged resoruces. ata_pci_init_one() is rewritten in terms of the aboved functions but native mode handling is still using the old method. Conversion will be completed when native mode handling is updated. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: fix native mode disabled port handlingTejun Heo2007-04-28
| | | | | | | | | | | | Disabled port handling in ata_pci_init_native_mode() is slightly broken in that it may end up using the wrong port_info. This patch updates it such that disables ports are made dummy as done in the legacy and other cases. While at it, fix indentation in ata_resources_present(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata/IDE: remove combined mode quirkJeff Garzik2007-04-28
| | | | | | | | | | | | | | | | | | | | | Both old-IDE and libata should be able handle all controllers and devices found using normal resource reservation methods. This eliminates the awful, low-performing split-driver configuration where old-IDE drove the PATA portion of a PCI device, in PIO-only mode, and libata drove the SATA portion of the /same/ PCI device, in DMA mode. Typically vendors would ship SATA hard drive / PATA optical configuration, which would lend itself to slow (PIO-only) CD-ROM performance. For Intel users running in combined mode, it is now wholly dependent on your driver choice (potentially link order, if you compile both drivers in) whether old-IDE or libata will drive your hardware. In either case, you will get full performance from both SATA and PATA ports now, without having to pass a kernel command line parameter. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Change prototype of mode_filter to remove ata_port*Alan Cox2007-04-28
| | | | | | | | | | | With Tejun having added adev->ap some time ago we can get rid of the almost unused port being passed to mode filters. And while we are doing filters, lets turn on the !IORDY filter as well. Signed-off-by: Alan Cox <alan@redhat.com> With some hand massaging from Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Trim trailing whitespace.Jeff Garzik2007-02-26
| | | | | | No code changes. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: s/ap->id/ap->print_id/gTejun Heo2007-02-21
| | | | | | | | | | | | | | | | | | | | ata_port has two different id fields - id and port_no. id is system-wide 1-based unique id for the port while port_no is 0-based host-wide port number. The former is primarily used to identify the ATA port to the user in printk messages while the latter is used in various places in libata core and LLDs to index the port inside the host. The two fields feel quite similar and sometimes ap->id is used in place of ap->port_no, which is very difficult to spot. This patch renames ap->id to ap->print_id to reduce the possibility of such bugs. Some printk messages are adjusted such that id string (ata%u[.%u]) isn't printed twice and/or to use ata_*_printk() instead of hardcoded id format. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: add another IRQ calls (core and headers)Akira Iguchi2007-02-09
| | | | | | | | | | | | | | | | | | This patch is against the libata core and headers. Two IRQ calls are added in ata_port_operations. - irq_on() is used to enable interrupts. - irq_ack() is used to acknowledge a device interrupt. In most drivers, ata_irq_on() and ata_irq_ack() are used for irq_on and irq_ack respectively. In some drivers (ex: ahci, sata_sil24) which cannot use them as is, ata_dummy_irq_on() and ata_dummy_irq_ack() are used. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Akira Iguchi <akira2.iguchi@toshiba.co.jp> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: convert to iomapTejun Heo2007-02-09
| | | | | | | | | | | | | | | | Convert libata core layer and LLDs to use iomap. * managed iomap is used. Pointer to pcim_iomap_table() is cached at host->iomap and used through out LLDs. This basically replaces host->mmio_base. * if possible, pcim_iomap_regions() is used Most iomap operation conversions are taken from Jeff Garzik <jgarzik@pobox.com>'s iomap branch. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: update libata core layer to use devresTejun Heo2007-02-09
| | | | | | | | | | | | | | | | | | | | | | Update libata core layer to use devres. * ata_device_add() acquires all resources in managed mode. * ata_host is allocated as devres associated with ata_host_release. * Port attached status is handled as devres associated with ata_host_attach_release(). * Initialization failure and host removal is handedl by releasing devres group. * Except for ata_scsi_release() removal, LLD interface remains the same. Some functions use hacky is_managed test to support both managed and unmanaged devices. These will go away once all LLDs are updated to use devres. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: trivial stuffAlan2007-02-09
| | | | | | | Readability/typos etc Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-sff: Don't try and activate channels which are not in useAlan2007-02-09
| | | | | | | | | | | An ATA controller in native mode may have one or more channels disabled and not assigned resources. In that case the existing code crashes trying to access I/O ports 0-7. Add the neccessary check. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Fix Maple PATA IRQ assignment.David Woodhouse2007-01-26
| | | | | | | | | | | | | | | | | | | | | | On the Maple board, the AMD8111 IDE is in legacy mode... except that it appears on IRQ 20 instead of IRQ 15. For drivers/ide this was handled by the architecture's "pci_get_legacy_ide_irq()" function, but in libata we just hard-code the numbers 14 and 15. This patch provides asm-powerpc/libata-portmap.h which maps the IRQ as appropriate, having added a pci_dev argument to the ATA_{PRIM,SECOND}ARY_IRQ macros. There's probably a better way to do this -- especially if we observe that the _only_ case in which this seemingly-generic "pci_get_legacy_ide_irq()" function returns anything other than 14 and 15 for primary and secondary respectively is the case of the AMD8111 on the Maple board -- couldn't we handle that with a special case in the pata_amd driver, or perhaps with a PCI quirk for Maple to switch it into native mode during early boot and assign resources properly? Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-sff: Don't call bmdma_stop on non DMA capable controllersAlan2007-01-25
| | | | | | | | Fixes bogus accesses to ports 0-15 with a non DMA capable controller. This I think should go in for 2.6.20 Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: implement ATA_FLAG_IGN_SIMPLEX and use it in sata_uliTejun Heo2007-01-25
| | | | | | | | | | Some uli controllers have stuck SIMPLEX bit which can't be cleared with ata_pci_clear_simplex(), but the controller is capable of doing DMAs on both channels simultaneously. Implement ATA_FLAG_IGN_SIMPLEX which makes libata ignore the simplex bit and use it in sata_uli. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] libata: fix combined modeAlan2007-01-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a slight variant on the patch I posted December 16th to fix libata combined mode handling. The only real change is that we now correctly also reserve BAR1,2,4. That is basically a neatness issue. Jeff was unhappy about two things 1. That it didn't work in the case of one channel native one channel legacy. This is a silly complaint because the SFF layer in libata doesn't handle this case yet anyway. 2. The case where combined mode is in use and IDE=n. In this case the libata quirk code reserves the resources in question correctly already. Once the combined mode stuff is redone properly (2.6.21) then the entire mess turns into a single pci_request_regions() for all cases and all the ugly resource hackery goes away. I'm sending this now rather than after running full test suites so that it can get the maximal testing in a short time. I'll be running tests on this after lunch. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jeff Garzik <jgarzik@pobox.com> Acked-by: Alessandro Suardi <alessandro.suardi@gmail.com> Acked-by: Theodore Tso <tytso@mit.edu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] libata: make sure IRQ is cleared after ata_bmdma_freeze()Tejun Heo2006-12-03
| | | | | | | | | | | | | | | | | | | | Now that BMDMA status is recorded in irq handler. ata_bmdma_freeze() is free to manipulate host status. Under certain circumstances, some controllers (ICH7 in enhanced mode w/ IRQ shared) raise IRQ when CTL register is written to and ATA_NIEN doesn't mask it. This patch makes ata_bmdma_freeze() clear all pending IRQs after freezing a port. This change makes explicit clearing in ata_device_add() unnecessary and thus kills it. The removed code was SFF-specific and was in the wrong place. Note that ->freeze() handler is always called under ap->lock held and irq disabled. Even if CTL manipulation causes stuck IRQ, it's cleared immediately. This should be safe (enough) even in SMP environment. More correct solution is to mask the IRQ from IRQ controller but that would be an overkill. Signed-off-by: Tejun Heo <htejun@gmail.com>
* [PATCH] libata: move BMDMA host status recording from EH to interrupt handlerTejun Heo2006-12-03
| | | | | | | | | For certain errors, interrupt handler alter BMDMA host status before entering EH (clears active and intr). Thus altered BMDMA host status value is recorded by BMDMA EH and reported to user. Move BMDMA host status recording from EH to interrupt handler. Signed-off-by: Tejun Heo <htejun@gmail.com>
* [PATCH] libata: set IRQF_SHARED for legacy PCI IDE IRQsTejun Heo2006-12-03
| | | | | | | | | | | | | | | There are machines out there which share legacy PCI IDE IRQs w/ other devices. libata SFF interrupt/HSM code is ready for shared IRQ and has been setting IRQF_SHARED for devices in native PCI mode. Device in legacy mode is still a PCI device and thus supposedly uses active-low level triggered IRQ. Machines with such setup should be quite rare and w/o this flag libata is likely to fail loading and render the system unuseable. Also, IDE driver has been setting IRQF_SHARED for devices in legacy mode for a looooong time. Signed-off-by: Tejun Heo <htejun@gmail.com>
* [PATCH] libata: move ata_irq_on() into libata-sff.cTejun Heo2006-12-01
| | | | | | | | | | ata_irq_on() isn't used outside of libata core layer. The function is TF/SFF interface specific but currently used by core path with some hack too. Move it from include/linux/libata.h to drivers/ata/libata-sff.c. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] sata_nv ADMA/NCQ support for nForce4Robert Hancock2006-12-01
| | | | | | | | | | | | | | | | | | | | | This patch adds support for ADMA mode on NVIDIA nForce4 (CK804/MCP04) SATA controllers to the sata_nv driver. Benefits of ADMA mode include: - NCQ support - Reduced CPU overhead (controller DMAs command information from memory instead of them being pushed in by the CPU) - Full 64-bit DMA support ADMA mode is enabled by default in this version. To disable it, set the module parameter adma_enabled=0. Signed-off-by: Robert Hancock <hancockr@shaw.ca> Cc: Jeff Garzik <jeff@garzik.org> Cc: Tejun Heo <htejun@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] libata-sff: Allow for wacky systemsAlan Cox2006-10-21
| | | | | | | | | | | | | There are some Linux supported platforms that simply cannot hit the low I/O addresses used by ATA legacy mode PCI mappings. These platforms have a window for PCI space that is fixed by the board logic and doesn't include the neccessary locations. Provide a config option so that such platforms faced with a controller that they cannot support simply error it and punt Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] init probe_ent->private_data in a common locationJeff Garzik2006-09-28
| | | | | | | | | | Don't write the same code twice, in two different functions, when they both call the same initialization function, with the same private_data pointer info. Also, note a bug found with a FIXME. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] minor PCI IDE probe fixes and cleanupsJeff Garzik2006-09-28
| | | | | | | | | | | | | | * Replace needless 'n_ports > 2' check with a simple BUG_ON(). No existing driver ever wants more than 2 ports. * Delete ATA_FLAG_NO_LEGACY check. No current driver uses ata_pci_init_one(), that sets this flag. * Move PCI_CLASS_PROG register read below pci_enable_device() * Handle ata_device_add() failure Signed-off-by: Jeff Garzik <jeff@garzik.org>
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