The second argument to ata_qc_complete() was being used for two
purposes: communicate the ATA Status register to the completion
function, and indicate an error.  On legacy PCI IDE hardware, the latter
is often implicit in the former.  On more modern hardware, the driver
often completely emulated a Status register value, passing ATA_ERR as an
indication that something went wrong.

Now that previous code changes have eliminated the need to use drv_stat
arg to communicate the ATA Status register value, we can convert it to a
mask of possible error classes.

This will lead to more flexible error handling in the future.

We now depend on ->tf_read() to provide us with the contents
of the Error shadow register.

Enforce access rules where appropriate.

If the compiler is smart enough, this may buy us an optimization or two
as a side effect.

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Simple cleanup to eliminate X copies of the pci_enable_intx() function
in libata.  Moved ahci.c's pci_intx() to pci.c and use it throughout
libata and msi.c.
Signed-off-by: NBrett Russ <russb@emc.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

ata_get_mode_mask() uses bits 3 and 4 in the pio_mask to represent PIO
modes 3 and 4.  The value read from the drive, which reports support
for PIO3 and PIO4 in bits 0 and 1, is shifted left by 3 bits and OR'd
with 0x7 (which then corresponds to PIO 2-0 in libata).  Thus, the
drivers below need adjustments to comply with the way pio_mask is
used.  I changed the masks from the commented values to all support
PIO4-0, since the spec mandates that PIO0-2 are supported and there's
no reason not to support PIO3 IMO.
Signed-off-by: NBrett Russ <russb@emc.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Don't bother calling a hook, to call our own module, to call a helper
than simply calls ionumap().

If you unroll all that convolution, you get a simple kfree()+iounmap()
pair of calls.

- changes license of all code from OSL+GPL to plain ole GPL
  - except for NVIDIA, who hasn't yet responded about sata_nv
  - copyright holders were already contacted privately

- adds info in each driver about where hardware/protocol docs may be
  obtained

- where I have made major contributions, updated copyright dates

Wrap ata_qc_complete() calls in EH context in spinlocks, to prevent
races (mainly in ATAPI code paths).

- bump versions where necessary
- remove two duplicated+outdated doc comments
- add MODULE_VERSION() to AHCI driver

Patch: fix wrong HD activity control by ahci driver

The ahci driver 1.0 sets the SActive bit on every transaction,
causing the LED to light up. The SActive bit is used only for
native command queuing (NCQ) which the current driver version
doesn't implement. Resetting the SActive bit is the device's
responsibility (by sending a "Set Device Bits FIS" to the
host adapter) but this is not required in response to
non-NCQ commands, and (most) devices don't. Thus the LED
stays always on. This patch fixes the LED behavior.

Spec references:
http://www.intel.com/technology/serialata/pdf/rev1_1.pdf, sec. 3.3.13, 5.5.1
http://www.serialata.org/docs/serialata10a.pdf
http://www.intel.com/design/storage/papers/25266401.pdf

Signed-off-by: Martin.Wilck@fujitsu-siemens.com
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Hello,

This patch adds the Intel ICH7-M DH DID to the ahci.c file for AHCI mode SATA support. This patch was built against the 2.6.13-rc6 kernel. 
If acceptable, please apply.

Thanks,

Jason Gaston
Signed-off-by: NJason Gaston <Jason.d.gaston@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

This patch removes unnecessary ata_port_start/stop() calls from
ahci_port_start/stop().
Signed-off-by: NTejun Heo <htejun@gmail.com>

Replace 'have_msi' variable with a bit in the existing 'flags' variable,.
AHCI_FLAG_MSI.

The previous patch did not compile cleanly on all architectures so
here's a fixed one which #includes <linux/dma-mapping.h>.

Use the DMA_{64,32}BIT_MASK constants from dma-mapping.h when calling
pci_set_dma_mask() or pci_set_consistent_dma_mask()
This patch includes dma-mapping.h explicitly because it caused errors
on some architectures otherwise.
See http://marc.theaimsgroup.com/?t=108001993000001&r=1&w=2 for details
Signed-off-by: NTobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: NDomen Puncer <domen@coderock.org>

diff -puN drivers/scsi/ahci.c~dma_mask-drivers_scsi_ahci drivers/scsi/ahci.c

Jens Axboe pointed out that the iounmap() call in libata was occurring
too early, and some drivers (ahci, probably others) were using ioremap'd
memory after it had been unmapped.

The patch should address that problem by way of improving the libata
driver API:

* move ->host_stop() call after all ->port_stop() calls have occurred.

* create default helper function ata_host_stop(), and move iounmap()
call there.

* add ->host_stop_prewalk() hook, use it in sata_qstor.c (hi Mark).
sata_qstor appears to require the host-stop-before-port-stop ordering
that existed prior to applying the attached patch.

This patch adds the Intel ESB2 DID's to the ahci.c file for AHCI mode SATA
support.
Signed-off-by: NJason Gaston <Jason.d.gaston@intel.com>
Cc: <linux-scsi@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!