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linux/drivers/ata
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Tejun Heo 837f5f8fb9 ahci: fix CAP.NP and PI handling 
AHCI uses CAP.NP to indicate the number of ports and PI to tell which
ports are enabled.  The only requirement is that the number of ports
indicated by CAP.NP should equal or be higher than the number of
enabled ports in PI.

CAP.NP and PI carry duplicate information and there have been some
interesting cases.  Some early AHCI controllers didn't set PI at all
and just implement from port 0 to CAP.NP.  An ICH8 board which wired
four out of six available ports had 3 (4 ports) for CAP.NP and 0x33
for PI.  While ESB2 has less bits set in PI than the value in CAP.NP.

Till now, ahci driver assumed that PI is invalid if it doesn't match
CAP.NP exactly.  This violates AHCI standard and the driver ends up
accessing unmimplemented ports on ESB2.

This patch updates CAP.NP and PI handling such that PI can have less
number of bits set than indicated in CAP.NP and the highest port is
determined as the maximum port of what CAP.NP and PI indicate.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-02-06 06:59:27 -05:00
..
ahci.c ahci: fix CAP.NP and PI handling 2008-02-06 06:59:27 -05:00
ata_generic.c ata_generic: Cenatek support 2008-01-23 05:24:17 -05:00
ata_piix.c drivers/ata/: Spelling fixes 2008-02-03 17:08:11 +02:00
Kconfig sata_mv: Remove PCI dependency 2008-02-01 12:26:37 -05:00
libata-acpi.c libata: reimplement ata_acpi_cbl_80wire() using ata_acpi_gtm_xfermask() 2008-01-23 05:24:12 -05:00
libata-core.c drivers/ata/: Spelling fixes 2008-02-03 17:08:11 +02:00
libata-eh.c libata: fix off-by-one in error categorization 2008-01-23 05:24:17 -05:00
libata-pmp.c libata-pmp: 4726 hates SRST 2008-01-10 16:53:12 -05:00
libata-scsi.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-01-25 17:19:08 -08:00
libata-sff.c libata: factor out ata_pci_activate_sff_host() from ata_pci_one() 2008-01-23 05:24:16 -05:00
libata.h libata: move ata_set_mode() to libata-eh.c 2008-01-23 05:24:10 -05:00
Makefile Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
pata_acpi.c libata: implement ata_timing_cycle2mode() and use it in libata-acpi and pata_acpi 2008-01-23 05:24:12 -05:00
pata_ali.c libata: checkpatch fixes 2008-01-23 05:24:10 -05:00
pata_amd.c pata_amd: update mode selection for NV PATAs 2008-01-23 05:24:12 -05:00
pata_artop.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_at32.c drivers/ata/: Spelling fixes 2008-02-03 17:08:11 +02:00
pata_atiixp.c pata_atiixp: Audit notes on locking 2007-10-12 14:55:42 -04:00
pata_bf54x.c Blackfin pata-bf54x driver: fix compiling bug - no ata_port struct in struct ata_device any more 2008-02-01 12:26:43 -05:00
pata_cmd64x.c pata_cmd64x.c typo fix 2007-10-20 01:02:48 +02:00
pata_cmd640.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_cs5520.c PCI: Remove users of pci_enable_device_bars() 2008-02-01 15:04:27 -08:00
pata_cs5530.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_cs5535.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_cs5536.c pata_cs5536: MWDMA fix 2007-10-19 22:55:03 -04:00
pata_cypress.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_efar.c drivers/ata/: Spelling fixes 2008-02-03 17:08:11 +02:00
pata_hpt3x2n.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_hpt3x3.c libata: implement and use ata_port_desc() to report port configuration 2007-10-12 14:55:37 -04:00
pata_hpt37x.c pata_hpt37x: checkpatch fixes 2008-01-23 05:24:13 -05:00
pata_hpt366.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_icside.c libata: convert to chained sg 2008-01-23 05:24:14 -05:00
pata_isapnp.c pata_isapnp: Polled devices 2007-11-23 19:33:27 -05:00
pata_it821x.c libata/pata_it821x: Improve handling of poorly compatible emulations 2008-01-23 05:24:15 -05:00
pata_it8213.c drivers/ata/: Spelling fixes 2008-02-03 17:08:11 +02:00
pata_ixp4xx_cf.c libata: update ->data_xfer hook for ATAPI 2008-01-23 05:24:14 -05:00
pata_jmicron.c pata_jmicron: fix disabled port handling in jmicron_pre_reset() 2007-11-23 19:23:55 -05:00
pata_legacy.c pata_legacy: Merge winbond support 2008-01-23 05:24:17 -05:00
pata_marvell.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_mpc52xx.c Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
pata_mpiix.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_netcell.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_ninja32.c libata: checkpatch fixes 2008-01-23 05:24:10 -05:00
pata_ns87410.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_ns87415.c pata_ns87415: define SUPERIO_IDE_MAX_RETRIES 2007-10-29 06:21:33 -04:00
pata_of_platform.c Rename: linux/pata_platform.h to linux/ata_platform.h 2008-02-06 06:54:17 -05:00
pata_oldpiix.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_opti.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_optidma.c [libata] fix 'if(' and similar areas that lack whitespace 2007-10-29 06:15:27 -04:00
pata_pcmcia.c pata_pcmcia: convert to new data_xfer prototype 2008-01-23 05:24:15 -05:00
pata_pdc202xx_old.c libata: rename ATA_PROT_ATAPI_* to ATAPI_PROT_* 2008-01-23 05:24:14 -05:00
pata_pdc2027x.c libata annotations and fixes 2008-01-23 05:24:15 -05:00
pata_platform.c Rename: linux/pata_platform.h to linux/ata_platform.h 2008-02-06 06:54:17 -05:00
pata_qdi.c libata: update ->data_xfer hook for ATAPI 2008-01-23 05:24:14 -05:00
pata_radisys.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_rz1000.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_sc1200.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
pata_scc.c libata: update ->data_xfer hook for ATAPI 2008-01-23 05:24:14 -05:00
pata_serverworks.c pata_serverworks: Fix cable types and cosmetics 2008-01-23 05:24:17 -05:00
pata_sil680.c pata_sil680: kill bogus reset code (take 2) 2007-11-23 19:23:55 -05:00
pata_sis.c drivers/ata/: Spelling fixes 2008-02-03 17:08:11 +02:00
pata_sl82c105.c pata_sl82c105: dual channel support 2008-02-01 12:26:40 -05:00
pata_triflex.c libata: Switch most of the remaining SFF drivers to ata_sff_port_start 2007-10-12 14:55:36 -04:00
pata_via.c libata: reimplement ata_acpi_cbl_80wire() using ata_acpi_gtm_xfermask() 2008-01-23 05:24:12 -05:00
pata_winbond.c pata_winbond: error return 2008-01-23 05:24:17 -05:00
pdc_adma.c libata: convert to chained sg 2008-01-23 05:24:14 -05:00
sata_fsl.c fix drivers/ata/sata_fsl.c double-decl 2008-01-23 05:24:17 -05:00
sata_inic162x.c iommu sg merging: sata_inic162x: use pci_set_dma_max_seg_size 2008-02-05 09:44:11 -08:00
sata_mv.c sata_mv: Support SoC controllers 2008-02-06 06:54:17 -05:00
sata_nv.c sata_nv: fix for completion handling 2008-02-01 12:26:38 -05:00
sata_promise.c libata: convert to chained sg 2008-01-23 05:24:14 -05:00
sata_promise.h libata annotations and fixes 2008-01-23 05:24:15 -05:00
sata_qstor.c libata: convert to chained sg 2008-01-23 05:24:14 -05:00
sata_sil.c libata: implement protocol tests 2008-01-23 05:24:10 -05:00
sata_sil24.c libata: convert to chained sg 2008-01-23 05:24:14 -05:00
sata_sis.c [libata] Address some checkpatch-spotted issues 2007-10-29 06:15:27 -04:00
sata_svw.c [libata] Address some checkpatch-spotted issues 2007-10-29 06:15:27 -04:00
sata_sx4.c libata annotations and fixes 2008-01-23 05:24:15 -05:00
sata_uli.c [libata] Address some checkpatch-spotted issues 2007-10-29 06:15:27 -04:00
sata_via.c [libata] Address some checkpatch-spotted issues 2007-10-29 06:15:27 -04:00
sata_vsc.c [libata] Address some checkpatch-spotted issues 2007-10-29 06:15:27 -04:00
sis.h libata: PATA-mode fixes for sis_sata 2007-07-02 10:17:42 -04:00