Not much to say here except that some drives have fixed and bad firmware
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
The current code follows the spec but uses an overlong delay. This would
be great if the hardware did. Several vendors however forget the D7
pulldown. Fortunately 0xFF isnt a sane reset state so we can use it to
skip detection as is done in drivers/ide. (ie this is a tested solution
over a long time)
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Alan noted: "bmdma may be zero but the bmdma_irq_clear function gets
called even in this case during pure PIO operation. Check we have a
bmdma before we use it."
I fixed this by adding a check for zero. While was I there, I fixed the
non-standard indentation of the small function's code.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Add some dummy noop functions for use by libata clients
that do not need to do anything. Future SAS patches will
utilize these functions.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
SCSI midlayer has moved hostt->eh_timed_out to transport template. As
libata doesn't need full-blown transport support yet, implement
minimal transport for libata. No transport class or whatsoever, just
empty transport template with ->eh_timed_out hook.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Move IDENTIFY info printing from ata_dev_read_id() to
ata_dev_configure() and print only if @print_info is non-zero. This
kills duplicate IDENTIFY info printing during probing.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
dev->id is used many times in ata_dev_configure(). Use local variable
id instead for shorter notation.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Check bit 2 of Word 53 for Word 88 validity before using Word 88 to
determine UDMA mask. Note that the original xfer mask implementation
using ata_get_mode_mask() didn't consider bit 2 of Word 53. This
patch introduces different (correct) behavior.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
ata_bus_probe() didn't set classes[] properly for port disabled case
of ->phy_reset() compatibility path. This patch moves classes[]
initialization and normalization out of ->probe_reset block such that
it applies to both ->probe_reset and ->phy_reset paths.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
ata_bus_probe() didn't initialize classes[] properly with
ATA_DEV_UNKNOWN. As ->probe_reset() is allowed to leave @classes
alone when no device is present, this results in garbage class values.
ATM, the only affected driver is ata_piix.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Preceding xfer_mask changes make the following functions unused.
ata_pio_modes(), base_from_shift(), ata_pr_blacklisted(), fgb()
Kill them. Also, as xfer_mode_str[] is now only used by
ata_mode_string(), move it into the function.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Use xfer_mask helpers to determine transfer mode. This rewrite also
makes transfer mode determination done before any actual
configuration. This patch doesn't result in any functional changes.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Replace quick & dirty max transfer mode determination in
ata_dev_configure() with ata_id_xfermask(). While at it, rename
xfer_modes variable to xfer_mask and make it unsigned int for
consistency.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Add ata_pack_xfermask(), ata_xfer_mask2mode(), ata_xfer_mode2mask(),
ata_xfer_mode2shift() and ata_id_xfermask(). These functions will be
used by following patches to simplify xfer_mask handling.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Add ATA_BITS_*, ATA_MASK_* macros and reorder xfer_mask fields such
that higher transfer mode is placed at higher order bit. As thie
reordering breaks ata_mode_string(), this patch also rewrites
ata_mode_string().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Make pio_task and atapi_packet_task use port_task.
atapi_packet_task() is moved upward such that it's right after
ata_pio_task(). This position is more natural and makes adding
prototype for ata_qc_issue_prot() unnecessary.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Implement port_task. LLDD's can schedule a function to be executed
with context after specified delay. libata core takes care of
synchronization against EH. This is generalized form of pio_task and
packet_task which are tied to PIO hsm implementation.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Revalidate device after transfer mode configuration. This also makes
dev->id up-to-date.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
ata_dev_revalidate() re-reads IDENTIFY PAGE of the given device and
makes sure it's the same device as the configured one. Once it's
verified that it's the same device, @dev is configured according to
newly read IDENTIFY PAGE. Note that revalidation currently doesn't
invoke transfer mode reconfiguration.
Criteria for 'same device'
* same class (of course)
* same model string
* same serial string
* if ATA, same n_sectors (to catch geometry parameter changes)
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Add @print_info argument to ata_dev_configure(). Details of
configured device is printed only when @pinfo_info is non-zero. This
patch also reorganizes device info printing for LBA case to simplify
code (necessary as @print_info adds extra nesting around it).
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
In ata_dev_configure(), reinitialize parameters before configuring.
This change is for revalidation and hotplug. As ata_dev_configure()
can be entered multiple times, parameters need to be reinitialized.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Now that reset and configure are converted such that they don't modify
or disable libata core data structures, reorganize ata_bus_probe() to
reflect this change.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
ata_dev_config() needs to be done everytime a device is configured.
Fold it into ata_dev_configure().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Separate out ata_dev_configure() from ata_dev_identify() such that
ata_dev_configure() only configures @dev according to passed in @id.
The function now does not disable device on failure, it just returns
appropirate error code.
As this change leaves ata_dev_identify() with only reading ID, calling
configure and disabling devices according to the results, this patch
also kills ata_dev_identify() and inlines the logic into
ata_bus_probe().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Convert dev->id from array to pointer. This is to accomodate
revalidation. During revalidation, both old and new IDENTIFY pages
should be accessible and single ->id array doesn't cut it.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Kill kfree(id) in failure path of ata_dev_read_id(). id is not
dynamically allocated yet.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Separate out ata_dev_read_id() from ata_dev_identify(). This is the
first half of splitting ata_dev_identify(). ata_dev_read_id() will
also be used for revalidation. This patch does not make any behavior
change.
ata_dev_read_id() doesn't modify any of libata-internal data
structures. It simply reads IDENTIFY page and returns error code on
failure. INIT_DEV_PARAMS and EDD wrong class code are also handled by
this function.
Re-reading IDENTIFY after INIT_DEV_PARAMS is performed by jumping to
retry: instead of calling ata_dev_reread_id(). This is done because
1. there's retry label anyway 2. ata_dev_reread_id() cannot be used
anywhere else so there's no reason to keep it.
This function is probably the place to set transfer mode to PIO0
before IDENTIFY. However, reset -> identify -> init_dev_params order
should be kept for pre-ATA4 devices so we cannot set transfer mode
before IDENTIFY for them. How do we know if a device is post-ATA4
before IDENTIFY?
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This patch makes ata_sg_setup_one() trim sg entry (thus making
qc->n_elem zero) if padding results in zero length sg entry.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
For ATAPI commands, padding can reduce qc->n_elem by one and thus to
zero making assert(qc->n_elem > 0)'s in ata_fill_sg() and qs_fill_sg()
fail for legal commands. This patch fixes the assert()'s to take
qc->pad_len into account.
Although the condition check seems a bit excessive, as this part of
code isn't still stable yet, I think it's worth to keep those.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
The comment above ata_std_postreset() specified that setting cable
type is the responsibility of postreset(), which isn't possible /
optimal depending on controller / driver. This patch kills the
comment. Setting cable type is responsibility of ->probe_reset.
libata doesn't care whether it's done in probeinit, reset or
postreset.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Update ata_dev_init_params() such that it doesn't disable port
directly but return with appropriate error mask on failure. This is
preparation for splitting ata_dev_identify(). Note that this patch
changes behavior of dev_init_params failure such that only failing
devices are taken offline not the whole port. This change is
intended.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This patch renames ata_dev_id_[c_]string() to ata_id_[c_]string().
All other functions which read data from ATA ID data start with ata_id
and those two function names were getting too long.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
- Fix the array index value in ata_rwcmd_protocol() for the added FUA commands.
- Filter out ATAPI packet command error messages in ata_pio_error()
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
If a low level driver wants to control max_sectors, it had to adjust
ap->host->max_sectors and set ATA_DFLAG_LOCK_SECTORS to tell
ata_scsi_slave_config not to override the limit. This is not only
cumbersome but also incorrect for hosts which support more than one
devices per port.
This patch adds per-device ->max_sectors. If the field is unset
(zero), libata core layer will adjust ->max_sectors according to
default rules. If the field is set, libata honors the setting.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
cdb_len is per-device property. Sharing cdb_len on ap results in
inaccurate configuration on revalidation and hotplugging. This patch
makes cdb_len per-device.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
ata_dev_knobble() unconditionally used the first device of the port to
determine whether a device is bridged or not. This causes bridge
limit to be incorrectly applied or unapplied for hosts with slave
devices (e.g. ata_piix).
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
EDD is never used with ->probe_reset. Don't handle EDD special case
in ata_dev_identify if ->probe_reset is in use.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Make ata_dump_id() take @id instead of @dev. This is preparation for
splitting ata_dev_identify().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Tejun Heo