linux-toradex.git/include/linux/libata.h, branch v2.6.25.17

libata: ATA_12/16 doesn't fall into ATAPI_MISC

2008-04-04T06:43:36+00:00

SAT passthrus don't really fit into ATAPI_MISC class.  SAT passthru
commands always transfer multiple of 512 bytes and variable length
response is not allowed.  This patch creates a separate category -
ATAPI_PASS_THRU - for these.

This fixes HSM violation on "hdparm -I".

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: uninline atapi_cmd_type()

2008-04-04T06:43:35+00:00

Uninline atapi_cmd_type().  It doesn't really have to be inline and
more case will be added which need to access unexported libata
variable.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: ATA_EHI_LPM should be ATA_EH_LPM

2008-03-29T16:21:31+00:00

EH actions are ATA_EH_* not ATA_EHI_*.  Rename ATA_EHI_LPM to
ATA_EH_LPM.

Signed-off-by: Tejun Heo 
Cc: Kristen Carlson Accardi 
Signed-off-by: Jeff Garzik

libata: implement ata_qc_raw_nbytes()

2008-03-25T02:09:12+00:00

Implement ata_qc_raw_nbytes() which determines the raw user-requested
size of a PC command.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: automatically use DMADIR if drive/bridge requires it

2008-02-24T05:27:33+00:00

Back in 2.6.17-rc2, a libata module parameter was added for atapi_dmadir.

That's nice, but most SATA devices which need it will tell us about it
in their IDENTIFY PACKET response, as bit-15 of word-62 of the
returned data (as per ATA7, ATA8 specifications).

So for those which specify it, we should automatically use the DMADIR bit.
Otherwise, disc writing will fail by default on many SATA-ATAPI drives.

This patch adds ATA_DFLAG_DMADIR and make ata_dev_configure() set it
if atapi_dmadir is set or identify data indicates DMADIR is necessary.
atapi_xlat() is converted to check ATA_DFLAG_DMADIR before setting
DMADIR.

Original patch is from Mark Lord.

Signed-off-by: Tejun Heo 
Cc: Mark Lord 
Signed-off-by: Jeff Garzik

ata: fix sparse warning in libata.h

2008-02-20T17:12:47+00:00

Avoids lots of these, also is more readable.
include/linux/libata.h:1210:13: warning: potentially expensive pointer subtraction

Change the subtraction to addition on the other side of the comparison.

Thanks to Christer Weinigel for the suggestion.

Signed-off-by: Harvey Harrison 
Acked-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: eliminate the home grown dma padding in favour of

2008-02-19T10:36:56+00:00

that provided by the block layer

ATA requires that all DMA transfers begin and end on word boundaries.
Because of this, a large amount of machinery grew up in ide to adjust
scatterlists on this basis.  However, as of 2.5, the block layer has a
dma_alignment variable which ensures both the beginning and length of a
DMA transfer are aligned on the dma_alignment boundary.  Although the
block layer does adjust the beginning of the transfer to ensure this
happens, it doesn't actually adjust the length, it merely makes sure
that space is allocated for transfers beyond the declared length.  The
upshot of this is that scatterlists may be padded to any size between
the actual length and the length adjusted to the dma_alignment safely
knowing that memory is allocated in this region.

Right at the moment, SCSI takes the default dma_aligment which is on a
512 byte boundary.  Note that this aligment only applies to transfers
coming in from user space.  However, since all kernel allocations are
automatically aligned on a minimum of 32 byte boundaries, it is safe to
adjust them in this manner as well.

tj: * Adjusting sg after padding is done in block layer.  Make libata
      set queue alignment correctly for ATAPI devices and drop broken
      sg mangling from ata_sg_setup().
    * Use request->raw_data_len for ATAPI transfer chunk size.
    * Killed qc->raw_nbytes.
    * Separated out killing qc->n_iter.

Signed-off-by: James Bottomley 
Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe

libata: kill now unused n_iter and fix sata_fsl

2008-02-06T11:59:32+00:00

qc->n_iter was used for libata's own sg walking before sg chaining
replaced it.  During conversion, the field and its usage in sata_fsl
were left behind.  Kill the filed and update sata_fsl.

tj: This was part of James's libata-use-block-layer-padding patch.
    Separated out by me.

Signed-off-by: James Bottomley 
Signed-off-by: Tejun Heo 
Cc: Li Yang 
Signed-off-by: Jeff Garzik

libata: factor out ata_pci_activate_sff_host() from ata_pci_one()

2008-01-23T10:24:16+00:00

Factor out ata_pci_activate_sff_host() from ata_pci_one().  This does
about the same thing as ata_host_activate() but needs to be separate
because SFF controllers use different and multiple IRQs in legacy
mode.

This will be used to make SFF LLD initialization more flexible.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: make ata_port_queue_task() an internal function

2008-01-23T10:24:15+00:00

ata_port_queue_task() served a single user:  ata_pio_task()

Rename to ata_pio_queue_task() and un-export it, as nobody outside of
libata-core.c uses it.

Signed-off-by: Jeff Garzik