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* libata-sff: separate out BMDMA initTejun Heo2010-05-261-1/+1
| | | | | | | | | Separate out ata_pci_bmdma_prepare_host() and ata_pci_bmdma_init_one() from their SFF counterparts. SFF ones no longer try to initialize BMDMA or set PCI master. 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/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Pass host flags into the pci helperAlan Cox2010-03-011-1/+1
| | | | | | | | | | This allows parallel scan and the like to be set without having to stop using the existing full helper functions. This patch merely adds the argument and fixes up the callers. It doesn't undo the special cases already in the tree or add any new parallel callers. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt{37x|3x2n}: improve timing register documentationSergei Shtylyov2010-03-011-16/+15
| | | | | | | | | Describe UDMA timing bits 18-20 and 21 separately; add a note to bit 31 about it being meaningful for PIO only. Reformat the whole comment, while at it... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt{37x|3x2n}: unify mode programmingSergei Shtylyov2010-03-011-78/+59
| | | | | | | | | | | | | As these drivers' set_piomode() and set_dmamode() methods are almost identical, factor out the common hpt{37x|3x2n}_set_mode() function to be called by both of them, the same as in 'pata_hpt366' driver. This results in ~5% decrease in the 'pata_hpt37x' driver binary size and in ~4% decrease in the 'pata_hpt3x2n' driver binary size (as measured on x86-32). Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt37x: use ATA_DMA_* constantsSergei Shtylyov2010-03-011-9/+10
| | | | | | | Use ATA_DMA_* constants instead of the bare numbers for the BMIDE registers. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: use pci_dev->revisionSergei Shtylyov2009-12-031-12/+9
| | | | | | | | | Some places were using PCI_CLASS_REVISION instead of PCI_REVISION_ID, so they weren't converted by commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 (PCI: Change all drivers to use pci_device->revision). Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt{37x|3x2n}: fix timing register masks (take 2)Sergei Shtylyov2009-12-031-17/+15
| | | | | | | | | | | | | | | | | | | | | | | | These drivers inherited from the older 'hpt366' IDE driver the buggy timing register masks in their set_piomode() metods. As a result, too low command cycle active time is programmed for slow PIO modes. Quite fortunately, it's later "fixed up" by the set_dmamode() methods which also "helpfully" reprogram the command timings, usually to PIO mode 4; unfortunately, setting an UltraDMA mode #N also reprograms already set PIO data timings, usually to MWDMA mode # max(N, 2) timings... However, the drivers added some breakage of their own too: the bit that they set/clear to control the FIFO is sometimes wrong -- it's actually the MSB of the command cycle setup time; also, setting it in DMA mode is wrong as this bit is only for PIO actually and clearing it for PIO modes is not needed as no mode in any timing table has it set... Fix all this, inverting the masks while at it, like in the 'hpt366' and 'pata_hpt366' drivers; bump the drivers' versions, accounting for recent patches that forgot to do it... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: stable@kernel.org Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt{37x,3x2n}: add debounce delay to cable detection methodsBartlomiej Zolnierkiewicz2009-12-031-0/+3
| | | | | | | | | | | | Alan Cox reported that cable detection sometimes works unreliably for HPT3xxN and that the issue is fixed by adding debounce delay as used by the vendor driver. Sergei Shtylyov also noticed that debounce delay is needed for all HPT37x and HPT3xxN chipsets according to vendor drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt37x: unify ->pre_reset methodsBartlomiej Zolnierkiewicz2009-12-031-21/+2
| | | | | | | We can use the same ->pre_reset method for all HPT37x chipsets now. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* pata_hpt37x: add proper cable detection methodsBartlomiej Zolnierkiewicz2009-12-031-30/+56
| | | | | Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* trivial: fix comment typo in drivers/ata/pata_hpt37x.cKrzysztof Halasa2009-09-211-1/+1
| | | | | | | A comment fix in drivers/ata/pata_hpt37x.c. Signed-off-by: Krzysztof Ha³asa <khc@pm.waw.pl> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* pata_hpt37x: fix HPT370 DMA timeoutsSergei Shtylyov2009-04-161-20/+2
| | | | | | | | | The libata driver has copied the code from the IDE driver which caused a post 2.4.18 regression on many HPT370[A] chips -- DMA stopped to work completely, only causing timeouts. Now remove hpt370_bmdma_start() for good... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] convert drivers to use ata.h mode mask definesErik Inge Bolsø2009-03-251-14/+14
| | | | | | | 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: rename SFF functionsTejun Heo2008-04-171-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: make reset related methods proper port operationsTejun Heo2008-04-171-41/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: stop overloading port_info->private_dataTejun Heo2008-04-171-19/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Heo2008-04-171-7/+1
| | | | | | | | | | | | | | | | | | | 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 Heo2008-04-171-111/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Heo2008-04-171-15/+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: PCI device should be powered up before being accessedTejun Heo2008-04-171-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* pata_hpt*, pata_serverworks: fix UDMA maskingAlan Cox2008-03-051-3/+3
| | | | | | | | | When masking, mask out the modes that are unsupported not the ones that are supported. This makes life happier. 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>
* pata_hpt37x: checkpatch fixesAndrew Morton2008-01-231-3/+4
| | | | | | | | | | | | | | | | | | | | | | WARNING: line over 80 characters #70: FILE: drivers/ata/pata_hpt37x.c:850: + struct pci_dev *pdev_0 = pci_get_slot(pdev->bus, pdev->devfn - 1); ERROR: else should follow close brace '}' #78: FILE: drivers/ata/pata_hpt37x.c:858: + } + else total: 1 errors, 1 warnings, 100 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: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt37x: Fix HPT374 detectionAlan Cox2007-12-191-1/+1
| | | | | | | Bug #9261 Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pata_hpt37x: Fix cable detect bug spotted by SergeiAlan Cox2007-11-241-1/+1
| | | | | Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt37x: Fix outstanding bug reports on the HPT374 and 37x cable detectAlan Cox2007-11-061-13/+36
| | | | | | | | | - Read frequency correctly - Correct cable detect handling - Fix wrong filter test Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Switch most of the remaining SFF drivers to ata_sff_port_startAlan Cox2007-10-121-4/+4
| | | | | | | | This avoids allocating DMA buffers if not needed but at the moment is mostly just a neatness item. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Remove ->port_disable() hookJeff Garzik2007-10-121-4/+0
| | | | | | | | It was always set to ata_port_disable(). Removed the hook, and replaced the very few ap->ops->port_disable() callsites with direct calls to ata_port_disable(). Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Remove ->irq_ack() hook, and ata_dummy_irq_on()Jeff Garzik2007-10-121-4/+0
| | | | | | | | | | | | | * ->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 resetTejun Heo2007-10-121-5/+7
| | | | | | | | | | | | | | Make reset methods and related functions deal with ata_link instead of ata_port. * ata_do_reset() * ata_eh_reset() * all prereset/reset/postreset methods and related functions This patch introduces no behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt{37x|3x2n}: fix clock reporting (take 2)Sergei Shtylyov2007-08-151-4/+6
| | | | | | | | | | | | | | | | Fix several inconsistencies in these drivers WRT reporting the clocks: - when using DPLL mode, 'pata_hpt37x' driver reported the DPLL frequency as the PCI clock -- make it properly report both clocks and add the same ability to the 'pata_hpt3x2n' driver; - both drivers sometimes use "pata_hpt3*:" and sometimes "hpt3*:" in the messages -- make them use only the former one; - the message about failed DPLL stablizatios deserves KERN_ERR and a bang. :-) Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt37x: actually clock HPT374 with 50 MHz DPLL (take 2)Sergei Shtylyov2007-08-151-8/+4
| | | | | | | | | | | The DPLL tuning code always set up it for 66 MHz due to wrong UltraDMA mask including mode 5 used to check for the necessity of 66 MHz clocking -- this caused 66 MHz clock to be used for HPT374 chip that does not tolerate it. While fixing this, also remove PLL mode from the TODO list -- I don't think it's still a relevant item. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt37x: Fix 2.6.22 clock PLL regressionAlan Cox2007-07-241-7/+7
| | | | | | | | | | | | | | Just one version of Linux ago The PLL code broke - oh no! But set the right mode And fix up the code Makes the PLL timing sync go [whatever happened to the sailor from Nantucket, hero of many limericks? -jg] Closes-bug: #8791 Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Use ATA_UDMAx standard masks when filling driver's udma_mask infoJeff Garzik2007-07-091-4/+4
| | | | | | | | | The ATA_UDMAx masks are self-documenting, and far better than manually writing in the hex mask. Note that pata_it8213 mask differed from the comment. Added a FIXME there. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] PATA drivers: remove ATA_FLAG_SRSTJeff Garzik2007-07-091-6/+6
| | | | | | | This flag only has meaning in old-EH drivers, and these drivers have already been converted to the new EH. Remove. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* HPT374 is UDMA100 not UDMA133Alan Cox2007-06-271-2/+2
| | | | | | | Propogate change from drivers/ide Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt37x: Further improvements based on the IDE updates and vendor driversAlan Cox2007-05-251-16/+11
| | | | | | | Better DPLL use and calibration Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Trim trailing whitespaceJeff Garzik2007-05-221-5/+5
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: clean up SFF init messTejun Heo2007-05-121-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: add deadline support to prereset and reset methodsTejun Heo2007-05-011-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_hpt37x: Further small fixesAlan Cox2007-04-281-14/+9
| | | | | | | | | | | | | Further HPT37x changes - No 66MHz 370/370A - Remove dead special case check now we use the DPLL (as per the IDE driver) Pointed out by Sergei 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>
* libata: Change prototype of mode_filter to remove ata_port*Alan Cox2007-04-281-6/+4
| | | | | | | | | | | 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>
* pata_hpt37x: Updates from drivers/ide workAlan Cox2007-04-281-212/+146
| | | | | | | | | | Drag pata_hpt37x kicking and screaming in the direction of drivers/ide/pci/hpt366.c and all the work that Sergei has been doing there. Plenty left to be done but this is a good snapshot for folks to work on and to review Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] bump versionsJeff Garzik2007-02-261-1/+1
| | | | | | Bump versions based on changes submitted during 2.6.21 merge window. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: add another IRQ calls (libata drivers)Akira Iguchi2007-02-091-0/+8
| | | | | | | | | | | | | | | | | | This patch is against each libata driver. 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 Heo2007-02-091-11/+11
| | | | | | | | | | | | | | | | 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 LLDs to use devresTejun Heo2007-02-091-8/+0
| | | | | | | | | | | | | | | | | Update libata LLDs to use devres. Core layer is already converted to support managed LLDs. This patch simplifies initialization and fixes many resource related bugs in init failure and detach path. For example, all converted drivers now handle ata_device_add() failure gracefully without excessive resource rollback code. As most resources are released automatically on driver detach, many drivers don't need or can do with much simpler ->{port|host}_stop(). In general, stop callbacks are need iff port or host needs to be given commands to shut it down. Note that freezing is enough in many cases and ports are automatically frozen before being detached. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: use ata_id_c_string()Tejun Heo2007-02-091-14/+4
| | | | | | | | | | There were several places where ATA ID strings are manually terminated and in some places possibly unterminated strings were passed to string functions which don't limit length like strstr(). This patch converts all of them over to ata_id_c_string(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: straighten out ATA_ID_* constantsTejun Heo2007-02-091-3/+2
| | | | | | | | | | | | | | * Kill _OFS suffixes in ATA_ID_{SERNO|FW_REV|PROD}_OFS for consistency with other ATA_ID_* constants. * Kill ATA_SERNO_LEN * Add and use ATA_ID_SERNO_LEN, ATA_ID_FW_REV_LEN and ATA_ID_PROD_LEN. This change also makes ata_device_blacklisted() use proper length for fwrev. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] trim trailing whitespaceJeff Garzik2007-02-091-2/+2
| | | | | | Most of these contributed by that mysterious figger known as A.C. Signed-off-by: Jeff Garzik <jeff@garzik.org>
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