libata switched to IRQ-driven IDENTIFY when IRQ-driven PIO was
introduced. This has caused a lot of problems including device
misdetection and phantom device.
ATA_FLAG_DETECT_POLLING was added recently to selectively use polling
IDENTIFY on problemetic drivers but many controllers and devices are
affected by this problem and trying to adding ATA_FLAG_DETECT_POLLING
for each such case is diffcult and not very rewarding.
This patch makes libata always use polling IDENTIFY. This is
consistent with libata's original behavior and drivers/ide's behavior.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Now that PCS isn't used for device detection anymore...
* esb_sata is identical to ich5_sata
* no reason to know present_shift
* no reason to store map_db in host private area
The MAP table itself is left because it can be used for SCR access.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
PATA PIIX uses reset signature + TF r/w test for device presence
detection, which doesn't always work. It sometimes reports phantom
device which results in IDENTIFY timeouts.
SATA PIIX uses some combination of PCS + reset signature + TF r/w test
for device presence detection. No combination satifies all and for
some controllers, there doesn't seem to be any combination which
works reliably.
This patch makes both PATA and SATA piix's use reset signature + TF
r/w + polling IDENTIFY for device detection. This is what the old
libata (before irq-pio and new EH) did and what IDE does.
This patch also removes now obsolete PIIX_FLAG_IGNORE_PCS, force_pcs
and related code.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This reverts commit f833229c96:
According to reviewers and the lspci data provided in commit message
itself, PCI ID 0x7110 should not have been added to ata_piix.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
ICH7M was separated from ICH6M to allow undocumented MAP value 01b
which was spotted on an ASUS notebook. However, there is also
notebooks with MAP value 01b on ICH6M. This patch re-merges ICH6M and
ICH7M entries and allows MAP value 01b for both.
This problem has been reported and initial patch provided by Jonathan
Dieter.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Jonathan Dieter <jdieter@gmail.com>
Cc: Tom Deblauwe <tom.deblauwe@telenet.be>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Hi Jeff,
I tested the PATA support on my old VAIO notebook, and it failed to find
my piix device:
00:07.1 Class 0101: 8086:7111 (rev 01) (prog-if 80 [Master])
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64
Region 4: I/O ports at fc90 [size=16]
This patch adds the pci id to ata_piix.c and things then work as
expected.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Use valid values for ICH8 map_db. With the old values, when the
controller was in Native mode, and SCC was 1 (drives configured for
IDE), any drive plugged into a slave port was not recognized. For
Combined Mode (and SCC is still 1), 2 is a value value for MAP.map_value,
and needs to be recognized.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This removes the layering violation where drivers have to fiddle
directly with EH flags. Instead we now recognize -ENOENT means "no port"
and do the handling in the core code.
This also removes an instance of a call to disable the port, and an
identical printk from each driver doing this. Even better - future rule
changes will be in one place only.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
The vast majority of drivers and changes are from Alan Cox. Albert Lee
contributed and maintains pata_pdc2027x. Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
The biggest change is that ata_host_set is renamed to ata_host.
* ata_host_set => ata_host
* ata_probe_ent->host_flags => ata_probe_ent->port_flags
* ata_probe_ent->host_set_flags => ata_probe_ent->_host_flags
* ata_host_stats => ata_port_stats
* ata_port->host => ata_port->scsi_host
* ata_port->host_set => ata_port->host
* ata_port_info->host_flags => ata_port_info->flags
* ata_(.*)host_set(.*)\(\) => ata_\1host\2()
The leading underscore in ata_probe_ent->_host_flags is to avoid
reusing ->host_flags for different purpose. Currently, the only user
of the field is libata-bmdma.c and probe_ent itself is scheduled to be
removed.
ata_port->host is reused for different purpose but this field is used
inside libata core proper and of different type.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
