linux-toradex.git/drivers/ata/pata_serverworks.c, branch v4.9.64

pata_serverworks: disable 64-KB DMA transfers on Broadcom OSB4 IDE Controller

2014-10-07T21:10:14+00:00

The Broadcom OSB4 IDE Controller (vendor and device IDs: 1166:0211)
does not support 64-KB DMA transfers.
Whenever a 64-KB DMA transfer is attempted,
the transfer fails and messages similar to the following
are written to the console log:

   [ 2431.851125] sr 0:0:0:0: [sr0] Unhandled sense code
   [ 2431.851139] sr 0:0:0:0: [sr0]  Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
   [ 2431.851152] sr 0:0:0:0: [sr0]  Sense Key : Hardware Error [current]
   [ 2431.851166] sr 0:0:0:0: [sr0]  Add. Sense: Logical unit communication time-out
   [ 2431.851182] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 76 f4 00 00 40 00
   [ 2431.851210] end_request: I/O error, dev sr0, sector 121808

When the libata and pata_serverworks modules
are recompiled with ATA_DEBUG and ATA_VERBOSE_DEBUG defined in libata.h,
the 64-KB transfer size in the scatter-gather list can be seen
in the console log:

   [ 2664.897267] sr 9:0:0:0: [sr0] Send:
   [ 2664.897274] 0xf63d85e0
   [ 2664.897283] sr 9:0:0:0: [sr0] CDB:
   [ 2664.897288] Read(10): 28 00 00 00 7f b4 00 00 40 00
   [ 2664.897319] buffer = 0xf6d6fbc0, bufflen = 131072, queuecommand 0xf81b7700
   [ 2664.897331] ata_scsi_dump_cdb: CDB (1:0,0,0) 28 00 00 00 7f b4 00 00 40
   [ 2664.897338] ata_scsi_translate: ENTER
   [ 2664.897345] ata_sg_setup: ENTER, ata1
   [ 2664.897356] ata_sg_setup: 3 sg elements mapped
   [ 2664.897364] ata_bmdma_fill_sg: PRD[0] = (0x66FD2000, 0xE000)
   [ 2664.897371] ata_bmdma_fill_sg: PRD[1] = (0x65000000, 0x10000)
   ------------------------------------------------------> =======
   [ 2664.897378] ata_bmdma_fill_sg: PRD[2] = (0x66A10000, 0x2000)
   [ 2664.897386] ata1: ata_dev_select: ENTER, device 0, wait 1
   [ 2664.897422] ata_sff_tf_load: feat 0x1 nsect 0x0 lba 0x0 0x0 0xFC
   [ 2664.897428] ata_sff_tf_load: device 0xA0
   [ 2664.897448] ata_sff_exec_command: ata1: cmd 0xA0
   [ 2664.897457] ata_scsi_translate: EXIT
   [ 2664.897462] leaving scsi_dispatch_cmnd()
   [ 2664.897497] Doing sr request, dev = sr0, block = 0
   [ 2664.897507] sr0 : reading 64/256 512 byte blocks.
   [ 2664.897553] ata_sff_hsm_move: ata1: protocol 7 task_state 1 (dev_stat 0x58)
   [ 2664.897560] atapi_send_cdb: send cdb
   [ 2666.910058] ata_bmdma_port_intr: ata1: host_stat 0x64
   [ 2666.910079] __ata_sff_port_intr: ata1: protocol 7 task_state 3
   [ 2666.910093] ata_sff_hsm_move: ata1: protocol 7 task_state 3 (dev_stat 0x51)
   [ 2666.910101] ata_sff_hsm_move: ata1: protocol 7 task_state 4 (dev_stat 0x51)
   [ 2666.910129] sr 9:0:0:0: [sr0] Done:
   [ 2666.910136] 0xf63d85e0 TIMEOUT

lspci shows that the driver used for the Broadcom OSB4 IDE Controller is
pata_serverworks:

   00:0f.1 IDE interface: Broadcom OSB4 IDE Controller (prog-if 8e [Master SecP SecO PriP])
           Flags: bus master, medium devsel, latency 64
           [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
           [virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1]
           I/O ports at 0170 [size=8]
           I/O ports at 0374 [size=4]
           I/O ports at 1440 [size=16]
           Kernel driver in use: pata_serverworks

The pata_serverworks driver supports five distinct device IDs,
one being the OSB4 and the other four belonging to the CSB series.
The CSB series appears to support 64-KB DMA transfers,
as tests on a machine with an SAI2 motherboard
containing a Broadcom CSB5 IDE Controller (vendor and device IDs: 1166:0212)
showed no problems with 64-KB DMA transfers.

This problem was first discovered when attempting to install openSUSE
from a DVD on a machine with an STL2 motherboard.
Using the pata_serverworks module,
older releases of openSUSE will not install at all due to the timeouts.
Releases of openSUSE prior to 11.3 can be installed by disabling
the pata_serverworks module using the brokenmodules boot parameter,
which causes the serverworks module to be used instead.
Recent releases of openSUSE (12.2 and later) include better error recovery and
will install, though very slowly.
On all openSUSE releases, the problem can be recreated
on a machine containing a Broadcom OSB4 IDE Controller
by mounting an install DVD and running a command similar to the following:

   find /mnt -type f -print | xargs cat > /dev/null

The patch below corrects the problem.
Similar to the other ATA drivers that do not support 64-KB DMA transfers,
the patch changes the ata_port_operations qc_prep vector to point to a routine
that breaks any 64-KB segment into two 32-KB segments and
changes the scsi_host_template sg_tablesize element to reduce by half
the number of scatter/gather elements allowed.
These two changes affect only the OSB4.

Signed-off-by: Scott Carter 
Signed-off-by: Tejun Heo 
Cc: stable@vger.kernel.org

ata: use CONFIG_PM_SLEEP instead of CONFIG_PM where applicable in host drivers

2014-05-10T02:37:49+00:00

This patch fixes host drivers to use CONFIG_PM_SLEEP instead of CONFIG_PM
where applicable.  Benefits of this change:

* unused code is not being compiled in for CONFIG_PM=y, CONFIG_PM_SLEEP=n
  and CONFIG_PM_RUNTIME=y configurations

* easier transition to use struct dev_pm_ops and SIMPLE_DEV_PM_OPS() in
  the future

* more consistent code (there are host drivers which are using the correct
  CONFIG_PM_SLEEP checks already)

The patch leaves the core libata code and ->port_[suspend,resume] support
in sata_[inic162x,nv,sil24].c alone for now.

Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Tejun Heo

ata: delete non-required instances of include

2014-02-13T21:40:56+00:00

None of these files are actually using any __init type directives
and hence don't need to include .  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.

Cc: linux-ide@vger.kernel.org
Signed-off-by: Paul Gortmaker 
Signed-off-by: Tejun Heo

ata: use pci_get_drvdata()

2013-06-03T05:22:03+00:00

Use the wrapper function for getting the driver data using pci_dev
instead of using dev_get_drvdata() with &pdev->dev, so we can directly
pass a struct pci_dev.  This is a purely cosmetic change.

Signed-off-by: Jingoo Han 
Signed-off-by: Tejun Heo

ata: use module_pci_driver

2012-07-25T19:12:11+00:00

This patch converts the drivers in drivers/ata/* to use module_pci_driver()
macro which makes the code smaller and a bit simpler.

Signed-off-by: Axel Lin 
Cc: Alan Cox 
Cc: Jeff Garzik 
Cc: Mikael Pettersson 
Cc: Mark Lord 
Cc: Jeremy Higdon 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Jeff Garzik

pata_serverworks: add serverworks_fixup()

2011-10-14T17:16:35+00:00

Factor out common code from serverworks_[re]init_one() to
serverworks_fixup().

Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Jeff Garzik

pata_serverworks: cleanup cable detection

2011-10-14T17:16:29+00:00

Merge identical cable routines for Dell and Sun systems into
common oem_cable() one.

Acked-by: Alan Cox 
Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Jeff Garzik

pata_serverworks: use standard cable detection methods

2011-10-14T17:15:54+00:00

Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Jeff Garzik

libata-sff: separate out BMDMA init

2010-05-25T23:40:30+00:00

Separate out ata_pci_bmdma_prepare_host() and ata_pci_bmdma_init_one()
from their SFF counterparts.  SFF ones no longer try to initialize
BMDMA or set PCI master.

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

libata-sff: clean up BMDMA initialization

2010-05-19T17:32:19+00:00

When BMDMA initialization failed or BMDMA was not available for
whatever reason, bmdma_addr was left at zero and used as an indication
that BMDMA shouldn't be used.  This leads to the following problems.

p1. For BMDMA drivers which don't use traditional BMDMA register,
    ata_bmdma_mode_filter() incorrectly inhibits DMA modes.  Those
    drivers either have to inherit from ata_sff_port_ops or clear
    ->mode_filter explicitly.

p2. non-BMDMA drivers call into BMDMA PRD table allocation.  It
    doesn't actually allocate PRD table if bmdma_addr is not
    initialized but is still confusing.

p3. For BMDMA drivers which don't use traditional BMDMA register, some
    methods might not be invoked as expected (e.g. bmdma_stop from
    ata_sff_post_internal_cmd()).

p4. SFF drivers w/ custom DMA interface implement noop BMDMA ops
    worrying libata core might call into one of them.

These problems are caused by the muddy line between SFF and BMDMA and
the assumption that all BMDMA controllers initialize bmdma_addr.

This patch fixes p1 and p2 by removing the bmdma_addr assumption and
moving prd allocation to BMDMA port start.  Later patches will fix the
remaining issues.

This patch improves BMDMA initialization such that

* When BMDMA register initialization fails, falls back to PIO instead
  of failing.  ata_pci_bmdma_init() never fails now.

* When ata_pci_bmdma_init() falls back to PIO, it clears
  ap->mwdma_mask and udma_mask instead of depending on
  ata_bmdma_mode_filter().  This makes ata_bmdma_mode_filter()
  unnecessary thus resolving p1.

* ata_port_start() which actually is BMDMA specific is moved to
  ata_bmdma_port_start().  ata_port_start() and ata_sff_port_start()
  are killed.

* ata_sff_port_start32() is moved and renamed to
  ata_bmdma_port_start32().

Drivers which no longer call into PRD table allocation are...

  pdc_adma, sata_inic162x, sata_qstor, sata_sx4, pata_cmd640 and all
  drivers which inherit from ata_sff_port_ops.

pata_icside sets ->port_start to ATA_OP_NULL as it doesn't need PRD
but is a BMDMA controller and doesn't have custom port_start like
other such controllers.

Note that with the previous patch which makes all and only BMDMA
drivers inherit from ata_bmdma_port_ops, this change doesn't break
drivers which need PRD table.

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