Commit Graph

29 Commits

Author SHA1 Message Date
Auke Kok
44c10138fd PCI: Change all drivers to use pci_device->revision
Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:02:10 -07:00
Jeff Garzik
bf6263a853 [libata] Use ATA_UDMAx standard masks when filling driver's udma_mask info
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>
2007-07-09 12:17:35 -04:00
Tejun Heo
464cf177df libata: always use polling SETXFER
Several people have reported LITE-ON LTR-48246S detection failed
because SETXFER fails.  It seems the device raises IRQ too early after
SETXFER.  This is controller independent.  The same problem has been
reported for different controllers.

So, now we have pata_via where the controller raises IRQ before it's
ready after SETXFER and a device which does similar thing.  This patch
makes libata always execute SETXFER via polling.  As this only happens
during EH, performance impact is nil.  Setting ATA_TFLAG_POLLING is
also moved from issue hot path to ata_dev_set_xfermode() - the only
place where SETXFER can be issued.

Note that ATA_TFLAG_POLLING applies only to drivers which implement
SFF TF interface and use libata HSM.  More advanced controllers ignore
the flag.  This doesn't matter for this fix as SFF TF controllers are
the problematic ones.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-06-04 16:48:34 -04:00
Jeff Garzik
52df0ee07c [libata] sata_via, pata_via: Add PCI IDs.
Supplied by VIA.

Also, convert named constants to hex values in the pata_via
PCI ID table.  (standard libata policy for PCI device IDs, which are
considered simply arbitrary hex numbers, without a need to create a
single-use constant in linux/pci_ids.h)

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-25 05:02:06 -04:00
Alan Cox
cf5792d20c pata_via: Handle laptops via DMI
Oh the joy of saving a fraction of a cent using short 40 wire cables and
not faking 80wire

Teach the VIA driver that there are some systems we need to know are
magically wired for high speeds.

Signed-off-by: Alan Cox <alan@redhat.com>
Tested-by: Francis Russell <FrancisRussell@btinternet.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-24 20:34:48 -04:00
Tejun Heo
1626aeb881 libata: clean up SFF init mess
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>
2007-05-11 18:09:18 -04:00
Tejun Heo
9666f4009c libata: reimplement suspend/resume support using sdev->manage_start_stop
Reimplement suspend/resume support using sdev->manage_start_stop.

* Device suspend/resume is now SCSI layer's responsibility and the
  code is simplified a lot.

* DPM is dropped.  This also simplifies code a lot.  Suspend/resume
  status is port-wide now.

* ata_scsi_device_suspend/resume() and ata_dev_ready() removed.

* Resume now has to wait for disk to spin up before proceeding.  I
  couldn't find easy way out as libata is in EH waiting for the
  disk to be ready and sd is waiting for EH to complete to issue
  START_STOP.

* sdev->manage_start_stop is set to 1 in ata_scsi_slave_config().
  This fixes spindown on shutdown and suspend-to-disk.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-11 18:01:03 -04:00
Tejun Heo
d4b2bab4f2 libata: add deadline support to prereset and reset methods
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>
2007-05-01 07:49:53 -04:00
Alan Cox
97cb81c335 pata_via: Use cable_detect method
We end up shifting a few bits of logic around in this driver but the
basic change is the same.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-28 14:15:56 -04:00
Tejun Heo
438ac6d5e3 libata: add missing CONFIG_PM in LLDs
Add missing #ifdef CONFIG_PM conditionals around all PM related parts
in libata LLDs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-03-02 18:30:35 -05:00
Jeff Garzik
a84471fe26 [libata] Trim trailing whitespace.
No code changes.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-26 05:51:33 -05:00
Akira Iguchi
246ce3b675 libata: add another IRQ calls (libata drivers)
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>
2007-02-09 17:39:38 -05:00
Tejun Heo
0d5ff56677 libata: convert to iomap
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>
2007-02-09 17:39:38 -05:00
Tejun Heo
24dc5f33ea libata: update libata LLDs to use devres
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>
2007-02-09 17:39:37 -05:00
Jeff Garzik
f20b16ff7c [libata] trim trailing whitespace
Most of these contributed by that mysterious figger known as A.C.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-09 17:39:29 -05:00
Alan
05c39e502e pata_via: Correct missing comments
The 8237S was added to the chipsets but not to the comments. Fix this

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 11:52:05 -05:00
Josepch Chan
e0b874df14 via82cxxx/pata_via: correct PCI_DEVICE_ID_VIA_SATA_EIDE ID and add support for CX700 and 8237S
This patch:
* Corrects the wrong device ID of PCI_DEVICE_ID_VIA_SATA_EIDE
  from 0x0581 to 0x5324.
* Adds VIA CX700 and VT8237S support in drivers/ide/pci/via82cxxx.c
* Adds VIA VT8237S support in drivers/ata/pata_via.c

Signed-off-by: Josepch Chan <josephchan@via.com.tw>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-01-27 13:47:08 +01:00
Andrew Morton
73720861d2 [libata] pata_via: suspend/resume support fix
Make this array static so it doesn't have to be built at runtime.

Cc: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-20 13:09:10 -05:00
Alan
5c9a76118d [PATCH] pata_via: Cable detect error
The UDMA66 VIA hardware has no controller side cable detect bits we can
use. This patch minimally fixes the problem by reporting unknown in this
case and using drive side detection.

The old drivers/ide code does some additional tricks but those aren't
appropriate now we are in -rc.

Without this update UDMA66 via controllers run slowly. They don't fail so
it's a borderline call whether this is -rc material or not.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-16 10:46:21 -05:00
Alan
75f609d2a9 [PATCH] pata_via: VIA 8251 bridged systems are now out and about
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-04 15:45:51 -05:00
Tejun Heo
3d3cca3755 [PATCH] libata: implement ATA_FLAG_SETXFER_POLLING and use it in pata_via, take #2
This patch implements ATA_FLAG_SETXFER_POLLING and use in pata_via.
If this flag is set, transfer mode setting performed by polling not by
interrupt.  This should help those controllers which raise interrupt
before the command is actually complete on SETXFER.

Rationale for this approach.

* uses existing facility and relatively simple
* no busy sleep in the interrupt handler
* updating drivers is easy

While at it, kill now unused flag ATA_FLAG_SRST in pata_via.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-12-03 17:56:23 +09:00
Tejun Heo
2eab80ac0c [PATCH] libata: kill unnecessary sht->max_sectors initializations
sht->max_sectors is overrided unconditionally in ->slave_configure.
There's no reason to set it to any value.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-12-03 17:56:22 +09:00
Alan
627d2d3261 [PATCH] pata_via suspend/resume support
The major VIA issues were handled by the quirks update for resume quirks.
The ATA driver also has to do some work however when resuming from RAM.
Certain chips need the FIFO reconfiguring, and the 66MHz clock setup
updating.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-01 22:46:58 -05:00
Tejun Heo
afdfe899e6 [PATCH] libata: add missing sht->slave_destroy
Many LLDs are missing sht->slave_destroy.  The method is mandatory to
support device warm unplugging (echo 1 > /sys/.../delete).  Without
it, libata might access released scsi device.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-11-29 14:57:58 +09:00
Jeff Garzik
2d2744fc8b [libata] PCI ID table cleanup in various drivers
* Use PCI_VDEVICE() macro
* const-ify pci_device_id table
* standardize list terminator as "{ }"
* convert spaces to tab in pci_driver struct (Alan-ism)
* various minor whitespace cleanups

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-28 20:21:59 -04:00
Jeff Garzik
bda3028813 [libata] Don't use old-EH ->eng_timeout() hook when not needed
The PATA driver set got converted to the new error handling setup, but
the old hooks were accidentally left in place.  Now, removed.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-09-27 05:41:13 -04:00
Alan Cox
c961922b73 [PATCH] libata-eh: Remove layering violation and duplication when handling absent ports
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>
2006-09-26 13:34:27 -04:00
Jeff Garzik
85cd7251b9 [libata #pata-drivers] Trim trailing whitespace. 2006-08-31 00:03:49 -04:00
Jeff Garzik
669a5db411 [libata] Add a bunch of PATA drivers.
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>
2006-08-29 18:12:40 -04:00