linux-toradex.git/drivers/rapidio/rio.c, branch v3.2.34

RapidIO/mpc85xx: fix possible mport registration problems

2011-04-14T23:06:56+00:00

Fix a possible problem with mport registration left non-cleared after
fsl_rio_setup() exits on link error.  Abort mport initialization if
registration failed.

This patch is applicable to 2.6.39-rc1 only.  The problem does not exist
for earlier versions.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: remove mport resource reservation from common RIO code

2011-03-24T02:46:43+00:00

Removes resource reservation from the common sybsystem initialization code
and make it part of mport driver initialization.  This resolves conflict
with resource reservation by device specific mport drivers.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Cc: Micha Nelissen 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: modify mport ID assignment

2011-03-24T02:46:43+00:00

Changes mport ID and host destination ID assignment to implement unified
method common to all mport drivers.  Makes "riohdid=" kernel command line
parameter common for all architectures with support for more that one host
destination ID assignment.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Cc: Micha Nelissen 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: modify subsystem and driver initialization sequence

2011-03-24T02:46:42+00:00

Subsystem initialization sequence modified to support presence of multiple
RapidIO controllers in the system.  The new sequence is compatible with
initialization of PCI devices.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Cc: Micha Nelissen 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: add architecture specific callbacks

2011-03-24T02:46:41+00:00

This set of patches eliminates RapidIO dependency on PowerPC architecture
and makes it available to other architectures (x86 and MIPS).  It also
enables support of new platform independent RapidIO controllers such as
PCI-to-SRIO and PCI Express-to-SRIO.

This patch:

Extend number of mport callback functions to eliminate direct linking of
architecture specific mport operations.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Cc: Micha Nelissen 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: add definitions of Component Tag fields

2011-01-13T16:03:18+00:00

Add definition of the unique device identifier field in the component tag.
 RIO_CTAG_UDEVID does not take all 32 bits of the component tag value to
allow future extensions to the component tag use.

Selected size of the RIO_CTAG_UDEVID field (17 bits) is sufficient to
accommodate maximum number of endpoints in large RIO network (16-bit id)
plus switches.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Cc: Micha Nelissen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: use common destid storage for endpoints and switches

2011-01-13T16:03:17+00:00

Change code to use one storage location common for switches and endpoints.
This eliminates unnecessary device type checks during basic access
operations.  Logic that assigns destid to RIO devices stays unchanged - as
before, switches use an associated destid because they do not have their
own.

Signed-off-by: Alexandre Bounine 
Cc: Kumar Gala 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Thomas Moll 
Cc: Micha Nelissen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: use resource_size()

2010-11-12T15:55:30+00:00

The size calculation is done incorrectly here because it should include
both the start and end (end - start + 1).  It's easiest to just use
resource_size() which does the right thing.

I was worried there was something non-standard going on because the
printk() subtracts "end - 1", but the rest of the file uses the normal
resource size calculations.  This function is only called from
fsl_rio_setup() in arch/powerpc/sysdev/fsl_rio.c and the calculation
there is also:

	port->iores.start = law_start;
	port->iores.end = law_start + law_size - 1;

So I think this is the correct fix.

Signed-off-by: Dan Carpenter 
Cc: Alexandre Bounine 
Acked-by: Li Yang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: fix IDLE2 bits corruption

2010-10-28T01:03:16+00:00

RapidIO spec v.2.1 adds Idle Sequence 2 into LP-Serial Physical Layer.
The fix ensures that corresponding bits are not corrupted during error
handling.

Signed-off-by: Alexandre Bounine 
Cc: Thomas Moll 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Kumar Gala 
Cc: Micha Nelissen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: add handling of redundant routes

2010-10-28T01:03:16+00:00

Detects RIO link to the already enumerated device and properly sets links
between device objects.  Changes to the enumeration/discovery logic:

1. Use Master Enable bit to signal end of the enumeration - agents may
   start their discovery process as soon as they see this bit set
   (Component Tag register was used before for this purpose).

2. Enumerator sets Component Tag (!= 0) immediately during device
   setup.  This allows to identify the device if the redundant route
   exists in a RIO system.

Signed-off-by: Alexandre Bounine 
Cc: Thomas Moll 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Kumar Gala 
Cc: Micha Nelissen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds