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* libata: Clarify ata_set_lba_range_entries functionMartin K. Petersen2009-12-031-10/+10
| | | | | | | | | ata_set_lba_range_entries used the variable max for two different things which was confusing. Make the function take a buffer size in bytes as argument and return the used buffer size upon completion. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: Report zeroed read after TRIM and max discard sizeMartin K. Petersen2009-12-031-0/+11
| | | | | | | | | | | | Our current TRIM payload is a single sector that can accommodate 64 * 65535 blocks being unmapped. Report this value in the Block Limits Maximum Unmap LBA count field. If a storage device supports TRIM and the DRAT and RZAT bits are set, report TPRZ=1 in Read Capacity(16). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: add translation for SCSI WRITE SAME (aka TRIM support)Christoph Hellwig2009-12-031-0/+13
| | | | | | | | | | | | | | Add support for the ATA TRIM command in libata. We translate a WRITE SAME 16 command with the unmap bit set into an ATA TRIM command and export enough information in READ CAPACITY 16 and the block limits EVPD page so that the new SCSI layer discard support will driver this for us. Note that I hardcode the WRITE_SAME_16 opcode for now as the patch to introduce the symbolic is not in 2.6.32 yet but only in the SCSI tree - as soon as it is merged we can fix it up to properly use the symbolic name. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: implement more acpi filtering optionsTejun Heo2009-10-061-0/+3
| | | | | | | | | Currently libata-acpi can only filter DIPM among SATA feature enables via _GTF. This patch adds the capability to filter out FPDMA non-zero offset, in-order guarantee and auto-activation. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: cosmetic updatesTejun Heo2009-10-061-3/+3
| | | | | | | | We're about to add more SATA_* and ATA_ACPI_FILTER_* constants. Reformat them in preparation. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: add command name parsing for error outputRobert Hancock2009-09-011-1/+31
| | | | | | | | | | | | | | | | | | | | | | | | | This patch improve libata's output for error/notification messages to allow easier comprehension and debugging: When ATAPI commands issued through the SCSI layer fail, use SCSI functions to print the CDB in human-readable form instead of just dumping out the CDB in hex. Print out the name of the failed command (as defined by the ATA specification) in error handling output along with the raw register contents. When reporting status of ACPI taskfile commands executed on resume, also output the names of the commands being executed (or not) in readable form. Since the extra data for printing command names increases kernel size slightly, a config option has been added to allow disabling command name output (as well as some of the error register parsing) for those highly sensitive to kernel text size. Signed-off-by: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] add DMA setup FIS auto-activate featureShaohua Li2009-09-011-0/+4
| | | | | | | Hopefully results in fewer on-the-wire FIS's and no breakage. We'll see! Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: add ata_id_pio_need_iordy() helper (v2)Bartlomiej Zolnierkiewicz2009-06-151-0/+14
| | | | | | | | | v2: Minor fixes per Sergei's review. Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* libata: Media rotation rate and form factor heuristicsMartin K. Petersen2009-05-151-0/+28
| | | | | | | | | | | | | | | | This patch provides new heuristics for parsing both the form factor and media rotation rate ATA IDENFITY words. The reported ATA version must be 7 or greater and the device must return values defined as valid in the standard. Only then are the characteristics reported to SCSI via the VPD B1 page. This seems like a reasonable compromise to me considering that we have been shipping several kernel releases that key off the rotation rate bit without any version checking whatsoever. With no complaints so far. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: Add TRIM infrastructureMatthew Wilcox2009-04-061-0/+41
| | | | | | | | This is common code shared between the IDE and libata implementations Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Merge branch 'upstream-linus' of ↵Linus Torvalds2009-03-261-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: (35 commits) [libata] Improve timeout handling [libata] Drain data on errors pata_sc1200: Activate secondary channel pata_artop: Serializing support [libata] ahci: correct enclosure LED state save [libata] More robust parsing for IDENTIFY DEVICE multi_count field sata_mv: fix LED blinking for SoC+NCQ sata_mv: optimize IRQ coalescing for 8-port chips sata_mv: implement IRQ coalescing (v2) sata_mv: cosmetic preparations for IRQ coalescing pata-rb532-cf: platform_get_irq() fix ignored failure pata_efar: fix *dma_mask pata_radisys: fix mwdma_mask to exclude mwdma0 [libata] convert drivers to use ata.h mode mask defines include/linux/ata.h: add some more transfer masks ahci: Blacklist HP Compaq 6720s that spins off disks during ACPI power off [libata] sata_mv: Implement direct FIS transmission via mv_qc_issue_fis(). [libata] Export ata_pio_queue_task() so that it can be used from sata_mv. [libata] sata_mv: Add a new mv_sff_check_status() function to sata_mv. [libata] sata_mv: Tighten up interrupt masking in mv_qc_issue() ...
| * include/linux/ata.h: add some more transfer masksErik Inge Bolsø2009-03-241-0/+6
| | | | | | | | | | Signed-off-by: Erik Inge Bolsø <knan-lkml@anduin.net> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | ide: remove broken EXABYTENEST supportBartlomiej Zolnierkiewicz2009-03-241-2/+0
|/ | | | | | | | | | do_identify() marks EXABYTENEST device as non-present and frees drive->id so enable_nest() has absolutely no chance of working. The code was like this since at least 2.6.12-rc2 and nobody has noticed so just remove broken EXABYTENEST support. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ata: add CFA specific identify data wordsSergei Shtylyov2009-03-051-0/+2
| | | | | | | | | Declare CFA specific identify data words 162 and 163 for future use. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com> [bart: update patch summary/description] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide/libata: fix ata_id_is_cfa() (take 4)Sergei Shtylyov2009-02-021-5/+10
| | | | | | | | | | | When checking for the CFA feature set support, ata_id_is_cfa() tests bit 2 in word 82 of the identify data instead the word 83; it also checks the ATA/PI version support in the word 80 (which the CompactFlash specifications have as reserved), this having no slightest chance to work on the modern CF cards that don't have 0x848A in the word 0... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ide: lba_capacity_is_ok() -> ata_id_is_lba_capacity_ok()Bartlomiej Zolnierkiewicz2008-10-101-0/+50
| | | | | | | | Rename lba_capacity_is_ok() to ata_id_is_lba_capacity_ok() and move it to <linux/ata.h> (remove needless parens while at it). Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide: ide_id_to_hd_driveid() -> ata_id_to_hd_driveid()Bartlomiej Zolnierkiewicz2008-10-101-0/+21
| | | | | | | | Rename ide_id_to_hd_driveid() to ata_id_to_hd_driveid() and move it to <linux/ata.h>. Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide: ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled()Bartlomiej Zolnierkiewicz2008-10-101-0/+13
| | | | | | | | | | | | * Add ata_id_flush_ext_enabled() inline helper to <linux/ata.h>. * ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled() The latter one also checks if the command is marked as supported in word 83 and validity of words 83 & 86. Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide: ide_id_has_flush_cache() -> ata_id_flush_enabled()Bartlomiej Zolnierkiewicz2008-10-101-0/+9
| | | | | | | | | | | | * Add ata_id_flush_enabled() inline helper to <linux/ata.h>. * ide_id_has_flush_cache() -> ata_id_flush_enabled() The latter one also checks if the command is marked as supported in word 83 and validity of words 83 & 86. Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide: idedisk_supports_lba48() -> ata_id_lba48_enabled()Bartlomiej Zolnierkiewicz2008-10-101-0/+9
| | | | | | | | | | | * Add ata_id_lba48_enabled() inline helper to <linux/ata.h>. * idedisk_supports_lba48() -> ata_id_lba48_enabled() The latter one also checks validity of words 83 & 86. Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ide: ide_dev_is_sata() -> ata_id_is_sata()Bartlomiej Zolnierkiewicz2008-10-101-1/+9
| | | | | | | | | | * Use optimized ATA version check from Sergei in ata_id_is_sata(). * ide_dev_is_sata() -> ata_id_is_sata() Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* Merge branch 'for-2.6.28' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-10-101-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.28' of git://git.kernel.dk/linux-2.6-block: (132 commits) doc/cdrom: Trvial documentation error, file not present block_dev: fix kernel-doc in new functions block: add some comments around the bio read-write flags block: mark bio_split_pool static block: Find bio sector offset given idx and offset block: gendisk integrity wrapper block: Switch blk_integrity_compare from bdev to gendisk block: Fix double put in blk_integrity_unregister block: Introduce integrity data ownership flag block: revert part of d7533ad0e132f92e75c1b2eb7c26387b25a583c1 bio.h: Remove unused conditional code block: remove end_{queued|dequeued}_request() block: change elevator to use __blk_end_request() gdrom: change to use __blk_end_request() memstick: change to use __blk_end_request() virtio_blk: change to use __blk_end_request() blktrace: use BLKTRACE_BDEV_SIZE as the name size for setup structure block: add lld busy state exporting interface block: Fix blk_start_queueing() to not kick a stopped queue include blktrace_api.h in headers_install ...
| * libata: set queue SSD flag for SSD devicesJens Axboe2008-10-091-0/+6
| | | | | | | | | | | | | | SSD devices should give an RPM setting of 1 in word 217 of the ID page. If we see such a device, tell the block layer about it. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | [libata] Introduce ata_id_has_unload()Elias Oltmanns2008-09-291-0/+9
|/ | | | | | | | Add a function to check an ATA device's id for head unload support as specified in ATA-7. Signed-off-by: Elias Oltmanns <eo@nebensachen.de> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] LBA28/LBA48 off-by-one bug in ata.hTaisuke Yamada2008-09-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I recently bought 3 HGST P7K500-series 500GB SATA drives and had trouble accessing the block right on the LBA28-LBA48 border. Here's how it fails (same for all 3 drives): # dd if=/dev/sdc bs=512 count=1 skip=268435455 > /dev/null dd: reading `/dev/sdc': Input/output error 0+0 records in 0+0 records out 0 bytes (0 B) copied, 0.288033 seconds, 0.0 kB/s # dmesg ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0 ata1.00: BMDMA stat 0x25 ata1.00: cmd c8/00:08:f8:ff:ff/00:00:00:00:00/ef tag 0 dma 4096 in res 51/04:08:f8:ff:ff/00:00:00:00:00/ef Emask 0x1 (device error) ata1.00: status: { DRDY ERR } ata1.00: error: { ABRT } ata1.00: configured for UDMA/33 ata1: EH complete ... After some investigations, it turned out this seems to be caused by misinterpretation of the ATA specification on LBA28 access. Following part is the code in question: === include/linux/ata.h === static inline int lba_28_ok(u64 block, u32 n_block) { /* check the ending block number */ return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256); } HGST drive (sometimes) fails with LBA28 access of {block = 0xfffffff, n_block = 1}, and this behavior seems to be comformant. Other drives, including other HGST drives are not that strict, through. >From the ATA specification: (http://www.t13.org/Documents/UploadedDocuments/project/d1410r3b-ATA-ATAPI-6.pdf) 8.15.29 Word (61:60): Total number of user addressable sectors This field contains a value that is one greater than the total number of user addressable sectors (see 6.2). The maximum value that shall be placed in this field is 0FFFFFFFh. So the driver shouldn't use the value of 0xfffffff for LBA28 request as this exceeds maximum user addressable sector. The logical maximum value for LBA28 is 0xffffffe. The obvious fix is to cut "- 1" part, and the patch attached just do that. I've been using the patched kernel for about a month now, and the same fix is also floating on the net for some time. So I believe this fix works reliably. Just FYI, many Windows/Intel platform users also seems to be struck by this, and HGST has issued a note pointing to Intel ICH8/9 driver. "28-bit LBA command is being used to access LBAs 29-bits in length" http://www.hitachigst.com/hddt/knowtree.nsf/cffe836ed7c12018862565b000530c74/b531b8bce8745fb78825740f00580e23 Also, *BSDs seems to have similar fix included sometime around ~2004, through I have not checked out exact portion of the code. Signed-off-by: Taisuke Yamada <tai@rakugaki.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* ata: add missing ATA_* definesBartlomiej Zolnierkiewicz2008-08-181-0/+13
| | | | | | | | Add missing ATA_* defines to <linux/ata.h>. Also add ATAPI_{LFS,EOM,ILI,IO,CODE} defines while at it. Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ata: add missing ATA_CMD_* definesBartlomiej Zolnierkiewicz2008-08-181-0/+20
| | | | | | | | | | | | Add missing ATA_CMD_* defines to <linux/ata.h>. Also add ATA_EXABYTE_ENABLE_NEST, SETFEATURES_AAM_* and ATA_SMART_* defines while at it. Partially based on earlier work by Chris Wedgwood. Acked-by: Chris Wedgwood <cw@f00f.org> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* ata: add missing ATA_ID_* defines (take 2)Bartlomiej Zolnierkiewicz2008-08-181-46/+76
| | | | | | | | | | | | Add missing ATA_ID_* defines and update {ata,atapi}_*() inlines accordingly. The currently unused defines are needed for the forthcoming drivers/ide/ changes. v2: Add ATA_ID_SPG. Acked-by: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* libata: automatically use DMADIR if drive/bridge requires itTejun Heo2008-02-241-0/+5
| | | | | | | | | | | | | | | | | | | | | | Back in 2.6.17-rc2, a libata module parameter was added for atapi_dmadir. That's nice, but most SATA devices which need it will tell us about it in their IDENTIFY PACKET response, as bit-15 of word-62 of the returned data (as per ATA7, ATA8 specifications). So for those which specify it, we should automatically use the DMADIR bit. Otherwise, disc writing will fail by default on many SATA-ATAPI drives. This patch adds ATA_DFLAG_DMADIR and make ata_dev_configure() set it if atapi_dmadir is set or identify data indicates DMADIR is necessary. atapi_xlat() is converted to check ATA_DFLAG_DMADIR before setting DMADIR. Original patch is from Mark Lord. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata annotations and fixesAl Viro2008-01-231-2/+2
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: rename ATA_PROT_ATAPI_* to ATAPI_PROT_*Tejun Heo2008-01-231-6/+6
| | | | | | | | | 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: add ATA_CBL_PATA_IGNTejun Heo2008-01-231-3/+4
| | | | | | | | | | | | | | | | | | ATA_CBL_PATA_UNK indicates that the cable type can't be determined from the host side and might be either 80c or 40c. libata applies drive or other generic limit in this case. However, there are controllers where both host and drive side detections are misimplemented and the driver has to rely solely on private method - peeking BIOS or ACPI configuration or using some other private mechanism. This patch adds ATA_CBL_PATA_IGN which tells libata to ignore the cable type completely and just let the LLD determine the transfer mode via host transfer mode masks and ->mode_filter(). Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: implement protocol testsTejun Heo2008-01-231-7/+64
| | | | | | | | | Implement protocol tests - ata_is_atapi(), ata_is_nodata(), ata_is_pio(), ata_is_dma(), ata_is_ncq() and ata_is_data() and use them to replace is_atapi_taskfile() and hard coded protocol tests. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Disable ATA8-ACS proposed Trusted Computing features by defaultAlan Cox2008-01-231-1/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | Historically word 48 in the identify data was used to mean 32bit I/O was supported for VLB IDE etc. ATA8 reassigns this word to the Trusted Computing Group, where it is used for TCG features. This means that an ATA8 TCG drive is going to trigger 32bit I/O on some systems which will be funny. Anyway we need to sort this out ready for ATA8 so: - Reorder the ata.h header a bit so the ata_version function occurs early in it - Make dword_io check the ATA version - Add an ATA8 version checking TCG presence test While we are at it the current drafts have a flaw where it may not be possible to disable TCG features at boot (and opt out of the trusted model) as TCG intends because it relies on presence of a different optional feature (DCS). Handle this in software by refusing the TCG commands if libata.allow_tpm is not set. (We must make it possible as some environments such as proprietary VDR devices will doubtless want to use it to lock up content) Finally as with CPRM print a warning so that the user knows they may not be able to full access and use the device. Signed-off-by: Alan Cox <alan@redhat.com>
* libata: correct handling of TSS DVDAlan Cox2008-01-151-2/+0
| | | | | | | | | | | | Devices that misreport the validity bit for word 93 look like SATA. If they are on the blacklist then we must not test for SATA but assume 40 wire in the 40 wire case (The TSSCorp reports 80 wire on SATA it seems!) Signed-off-by: Alan Cox <alan@redhat.com> Cc: Tejun Heo <htejun@gmail.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: add more opcodes to ata.hTejun Heo2007-12-171-0/+15
| | | | | | | | Add constants for DEVICE CONFIGURATION OVERLAY and SET_MAX to include/linux/ata.h. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: handle broken cable reportingAlan Cox2007-11-051-0/+9
| | | | | | | | | | | | | One or two ancient drives predated the cable spec and didn't sent the valid bits for the field. I had hoped to leave this out of libata as a piece of historical annoyance but a recent CD drive shows the same bug so we have to import support for it. Same concept as Bartlomiej's changes old IDE except that as we have centralised blacklists we can avoid keeping another private table of stuff Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata and bogus LBA48 drivesGeert Uytterhoeven2007-11-041-0/+2
| | | | | | | | | | | | A colleague noticed recent versions of Ubuntu no longer detect his 80 GB ST380020ACE drive. This drive is special in that it advertises LBA48 support, but has the lba_capacity_2 field set to zero (cfr. http://lkml.org/lkml/2004/3/30/163). Upon closer look, libata indeed doesn't seem to handle this case yet. Below is an (untested) fix. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: increase 128 KB / cmd limit for ATAPI tape drivesTony Battersby2007-11-031-0/+6
| | | | | | | | | | | | | | | | | | | | | | | Commands sent to ATAPI tape drives via the SCSI generic (sg) driver are limited in the amount of data that they can transfer by the max_sectors value. The max_sectors value is currently calculated according to the command set for disk drives, which doesn't apply to tape drives. The default max_sectors value of 256 limits ATAPI tape drive commands to 128 KB. This patch against 2.6.24-rc1 increases the max_sectors value for tape drives to 65535, which permits tape drive commands to transfer just under 32 MB. Tested with a SuperMicro PDSME motherboard, AHCI, and a Sony SDX-570V SATA tape drive. Note that some of the chipset drivers also set their own max_sectors value, which may override the value set in libata-core. I don't have any of these chipsets to test, so I didn't go messing with them. Also, ATAPI devices other than tape drives may benefit from similar changes, but I have only tape drives and disk drives to test. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Link power management infrastructureKristen Carlson Accardi2007-10-291-0/+21
| | | | | | | | | | | | | | | | | | | | | | Device Initiated Power Management, which is defined in SATA 2.5 can be enabled for disks which support it. This patch enables DIPM when the user sets the link power management policy to "min_power". Additionally, libata drivers can define a function (enable_pm) that will perform hardware specific actions to enable whatever power management policy the user set up for Host Initiated Power management (HIPM). This power management policy will be activated after all disks have been enumerated and intialized. Drivers should also define disable_pm, which will turn off link power management, but not change link power management policy. Documentation/scsi/link_power_management_policy.txt has additional information. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* libata: track SLEEP state and issue SRST to wake it upTejun Heo2007-10-291-0/+1
| | | | | | | | | | | | | | | ATA devices in SLEEP mode don't respond to any commands. SRST is necessary to wake it up. Till now, when a command is issued to a device in SLEEP mode, the command times out, which makes EH reset the device and retry the command after that, causing a long delay. This patch makes libata track SLEEP state and issue SRST automatically if a command is about to be issued to a device in SLEEP. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Bruce Allen <ballen@gravity.phys.uwm.edu> Cc: Andrew Paprocki <andrew@ishiboo.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] checkpatch-inspired cleanupsJeff Garzik2007-10-231-3/+3
| | | | | | | | | | | | 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>
* libata: add human-readable error value decodingRobert Hancock2007-10-121-0/+9
| | | | | | | | | | | | | | | | This adds human-readable decoding of the ATA status and error registers (similar to what drivers/ide does) as well as the SATA Serror register to libata error handling output. This prevents the need to pore through standards documents to figure out the meaning of the bits in these registers when looking at error reports. Some bits that drivers/ide decoded are not decoded here, since the bits are either command-dependent or obsolete, and properly parsing them would add too much complexity. Signed-off-by: Robert Hancock <hancockr@shaw.ca> [edited slightly to make output a bit more symmetric] Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: misc updates for ANTejun Heo2007-10-121-1/+1
| | | | | | | | | | | | | | | Update AN support in preparation of PMP support. * s/ata_id_has_AN/ata_id_has_atapi_AN/ * add AN enabled reporting during configuration * add err_mask to AN configuration failure reporting * update LOCKING comment for ata_scsi_media_change_notify() * check whether ATA dev is attached to SCSI dev ata_scsi_media_change_notify() * set ATA_FLAG_AN in ahci and sata_sil24 Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Kriten Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Strict checking for identify reportingAlan Cox2007-10-121-11/+85
| | | | | | | | | | | | | | The ATA specifications require checks on certain flags before assuming the validity of other data. Go through the methods and correct those needing extra checks. Also note limits on ata_id_major_version with respect to ATA-1 and ATA-2. Correct the 32bit PIO check. Wants to sit in -mm for a bit in case of a screwup on my part that I didn't hit on the test drives and also in case someone, somewhere has a drive that gets it wrong. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] check for SATA async notify supportKristen Carlson Accardi2007-10-121-0/+9
| | | | | | | | Check to see if an ATAPI device supports Asynchronous Notification. If so, enable it, if the host controller supports AN. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Correct IORDY handlingAlan Cox2007-10-121-1/+1
| | | | | | | | | | | | | | | | Debugging a report of a problem with an ancient solid state disk showed up some problems in the IORDY handling 1. We check the wrong bit to see if the device has IORDY 2. Even then some ancient creaking piles of crap don't support SETXFER at all. The cases it fixes are obscure and the risk of side effects is slight but possible. This also moves us slightly closer to supporting original MFM/RLL disks with libata. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata: add ATA_MWDMA* and ATA_SWDMA* definesBartlomiej Zolnierkiewicz2007-08-311-0/+13
| | | | | | Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ide: add PIO masksBartlomiej Zolnierkiewicz2007-07-201-0/+9
| | | | | | | | | | | | | * Add ATA_PIO[0-6] defines to <linux/ata.h>. * Add ->pio_mask field to ide_pci_device_t and ide_hwif_t. * Add PIO masks to host drivers. <linux/ata.h> change ACK-ed by Jeff Garzik <jeff@garzik.org>. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* libata-link: add PMP related ATA constantsTejun Heo2007-07-101-0/+29
| | | | | | | | Add Port Multiplier related ATA constants and macros. Some of these will be used by ata_link implementation. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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