1. 12 Oct, 2007 3 commits
  2. 09 Jul, 2007 1 commit
  3. 11 May, 2007 2 commits
    • Tejun Heo's avatar
      libata: clean up SFF init mess · 1626aeb8
      Tejun Heo authored
      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: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      1626aeb8
    • Tejun Heo's avatar
      libata: reimplement suspend/resume support using sdev->manage_start_stop · 9666f400
      Tejun Heo authored
      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: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      9666f400
  4. 01 May, 2007 1 commit
    • Tejun Heo's avatar
      libata: add deadline support to prereset and reset methods · d4b2bab4
      Tejun Heo authored
      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: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      d4b2bab4
  5. 28 Apr, 2007 1 commit
  6. 02 Mar, 2007 1 commit
  7. 09 Feb, 2007 3 commits
    • Akira Iguchi's avatar
      libata: add another IRQ calls (libata drivers) · 246ce3b6
      Akira Iguchi authored
      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: default avatarKou Ishizaki <kou.ishizaki@toshiba.co.jp>
      Signed-off-by: default avatarAkira Iguchi <akira2.iguchi@toshiba.co.jp>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      246ce3b6
    • Tejun Heo's avatar
      libata: convert to iomap · 0d5ff566
      Tejun Heo authored
      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: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      0d5ff566
    • Tejun Heo's avatar
      libata: update libata LLDs to use devres · 24dc5f33
      Tejun Heo authored
      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: default avatarTejun Heo <htejun@gmail.com>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      24dc5f33
  8. 03 Dec, 2006 1 commit
  9. 02 Dec, 2006 1 commit
  10. 29 Nov, 2006 1 commit
  11. 29 Sep, 2006 1 commit
  12. 27 Sep, 2006 1 commit
  13. 26 Sep, 2006 1 commit
  14. 29 Aug, 2006 1 commit