linux-toradex.git/arch/powerpc/sysdev/fsl_rio.c, branch v4.14

rapidio: remove global irq spinlocks from the subsystem

2017-10-04T00:54:24+00:00

Locking of config and doorbell operations should be done only if the
underlying hardware requires it.

This patch removes the global spinlocks from the rapidio subsystem and
moves them to the mport drivers (fsl_rio and tsi721), only to the
necessary places.  For example, local config space read and write
operations (lcread/lcwrite) are atomic in all existing drivers, so there
should be no need for locking, while the cread/cwrite operations which
generate maintenance transactions need to be synchronized with a lock.

Later, each driver could chose to use a per-port lock instead of a
global one, or even more granular locking.

Link: http://lkml.kernel.org/r/20170824113023.GD50104@nokia.com
Signed-off-by: Ioan Nicu 
Signed-off-by: Frank Kunz 
Acked-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: Nicholas Piggin 
Cc: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc: Convert to using %pOF instead of full_name

2017-08-23T12:27:04+00:00

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: Anatolij Gustschin 
Cc: Scott Wood 
Cc: Kumar Gala 
Cc: Arnd Bergmann 
Cc: linuxppc-dev@lists.ozlabs.org
Reviewed-by: Tyrel Datwyler 
Signed-off-by: Michael Ellerman

powerpc: Add support for relative exception tables

2016-11-14T00:11:51+00:00

This halves the exception table size on 64-bit builds, and it allows
build-time sorting of exception tables to work on relocated kernels.

Signed-off-by: Nicholas Piggin 
[mpe: Minor asm fixups and bits to keep the selftests working]
Signed-off-by: Michael Ellerman

powerpc: EX_TABLE macro for exception tables

2016-11-14T00:11:51+00:00

This macro is taken from s390, and allows more flexibility in
changing exception table format.

mpe: Put it in ppc_asm.h and only define one version using
stringinfy_in_c(). Add some empty definitions and headers to keep the
selftests happy.

Signed-off-by: Nicholas Piggin 
Signed-off-by: Michael Ellerman

powerpc: migrate exception table users off module.h and onto extable.h

2016-08-22T01:09:33+00:00

These files were only including module.h for exception table
related functions.  We've now separated that content out into its
own file "extable.h" so now move over to that and avoid all the
extra header content in module.h that we don't really need to compile
these files.

Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Paul Gortmaker 
Signed-off-by: Benjamin Herrenschmidt

powerpc/fsl_rio: fix a missing error code

2016-08-05T00:02:09+00:00

We should set the error code here rather than incorrectly returning 0.
Otherwise static checkers complain.

Link: http://lkml.kernel.org/r/20160804053525.GM775@mwanda
Signed-off-by: Dan Carpenter 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: Alexandre Bounine 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc/fsl_rio: apply changes for RIO spec rev 3

2016-08-02T23:35:38+00:00

 - Remove check for parallel PHY

 - Set LP-Serial Register Map type

[akpm@linux-foundation.org: fix build]
[alexandre.bounine@idt.com: fix build fix]
 Link: http://lkml.kernel.org/r/20160802184932.2755-1-alexandre.bounine@idt.com
Link: http://lkml.kernel.org/r/1469125134-16523-13-git-send-email-alexandre.bounine@idt.com
Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Benjamin Herrenschmidt 
Cc: Michael Ellerman 
Cc: Andre van Herk 
Cc: Barry Wood 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: change inbound window size type to u64

2016-08-02T23:35:37+00:00

Current definition of map_inb() mport operations callback uses u32 type
to specify required inbound window (IBW) size.  This is limiting factor
because existing hardware - tsi721 and fsl_rio, both support IBW size up
to 16GB.

Changing type of size parameter to u64 to allow IBW size configurations
larger than 4GB.

[alexandre.bounine@idt.com: remove compiler warning about size of constant]
  Link: http://lkml.kernel.org/r/20160802184856.2566-1-alexandre.bounine@idt.com
Link: http://lkml.kernel.org/r/1469125134-16523-11-git-send-email-alexandre.bounine@idt.com
Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Benjamin Herrenschmidt 
Cc: Michael Ellerman 
Cc: Andre van Herk 
Cc: Barry Wood 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: add global inbound port write interfaces

2016-03-22T22:36:02+00:00

Add new Port Write handler registration interfaces that attach PW
handlers to local mport device objects.  This is different from old
interface that attaches PW callback to individual RapidIO device.  The
new interfaces are intended for use for common event handling (e.g.
hot-plug notifications) while the old interface is available for
individual device drivers.

This patch is based on patch proposed by Andre van Herk but preserves
existing per-device interface and adds lock protection for list
handling.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Aurelien Jacquiot 
Cc: Andre van Herk 
Cc: Stephen Rothwell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc/fsl_rio: changes to mport registration

2016-03-22T22:36:02+00:00

Change mport object initialization/registration sequence to match
reworked version of rio_register_mport() in the core code.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Benjamin Herrenschmidt 
Cc: Aurelien Jacquiot 
Cc: Andre van Herk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds