linux-toradex.git/arch/tile/gxio/mpipe.c, branch v4.4.87

tile: use global strscpy() rather than private copy

2015-09-10T19:37:02+00:00

Now that strscpy() is a standard API, remove the local copy.

Signed-off-by: Chris Metcalf

ptp: tilegx: convert to the 64 bit get/set time methods.

2015-03-31T16:01:18+00:00

This driver is 64 bit only, and so this driver and device are ready
for 2038.  This patch changes the driver to the new PHC and also
carries the timespec64 parameter on out to the gxio_mpipe_get-
set_timestamp functions, making explicit the fact that the tv_sec
field is 64 bits wide.

Not even compile tested.

Signed-off-by: Richard Cochran 
Acked-by: Chris Metcalf 
Signed-off-by: David S. Miller

arch: tile: gxio: Export symbols for module using in 'mpipe.c'

2014-11-11T20:41:45+00:00

'gxio_mpipe_adjust_timestamp', 'gxio_mpipe_link_instance',
'gxio_mpipe_get_timestamp', and 'gxio_mpipe_set_timestamp' may be use by
other tile modules, so export them.

The related error (with allmodconfig under tile):

    MODPOST 4002 modules
  ERROR: "gxio_mpipe_link_instance" [drivers/net/ethernet/tile/tile_net.ko] undefined!
  ERROR: "gxio_mpipe_get_timestamp" [drivers/net/ethernet/tile/tile_net.ko] undefined!
  ERROR: "gxio_mpipe_set_timestamp" [drivers/net/ethernet/tile/tile_net.ko] undefined!
  ERROR: "gxio_mpipe_adjust_timestamp" [drivers/net/ethernet/tile/tile_net.ko] undefined!

Signed-off-by: Chen Gang 
Signed-off-by: Chris Metcalf

tile gxio: use better string copy primitive

2014-10-02T14:19:34+00:00

Both strncpy and strlcpy suffer from the fact that they do
partial copies of strings into the destination when the target
buffer is too small.  This is frequently pointless since an
overflow of the target buffer may make the result invalid.

strncpy() makes it relatively hard to even detect the error
condition, and with strlcpy() you have to duplicate the buffer
size parameter to test to see if the result exceeds it.
By returning zero in the failure case, we both make testing
for it easy, and by simply not copying anything in that case,
we make it mandatory for callers to test the error code.

To catch lazy programmers who don't check, we also place a NUL at
the start of the destination buffer (if there is space) to
ensure that the result is an invalid string.

At some point it may make sense to promote strscpy() to
a global platform-independent function, but other than the
reviewers, no one was interested on LKML, so for now leave
the strscpy() function as file-static.

Reviewed-by: Randy Dunlap 
Reviewed-by: Rickard Strandqvist 
Signed-off-by: Chris Metcalf

tile: support multiple mPIPE shims in tilegx network driver

2013-08-01T21:35:50+00:00

The initial driver support was for a single mPIPE shim on the chip
(as is the case for the Gx36 hardware).  The Gx72 chip has two mPIPE
shims, so we extend the driver to handle that case.

Signed-off-by: Chris Metcalf 
Signed-off-by: David S. Miller

tile: support jumbo frames in the tilegx network driver

2013-08-01T21:35:50+00:00

Signed-off-by: Chris Metcalf 
Signed-off-by: David S. Miller

arch/tile: provide kernel support for the tilegx mPIPE shim

2012-07-11T20:04:55+00:00

The TILE-Gx chip includes a packet-processing network engine called
mPIPE ("Multicore Programmable Intelligent Packet Engine").  This
change adds support for using the mPIPE engine from within the
kernel.  The engine has more functionality than is exposed here,
but to keep the kernel code and binary simpler, this is a subset
of the full API designed to enable standard Linux networking only.

Signed-off-by: Chris Metcalf