Commit graph

21 commits

Author SHA1 Message Date
Hans Petter Selasky
b9bf16adfb Implement the atomic fetch add unless functions for the LinuxKPI.
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2020-04-20 16:21:37 +00:00
Hans Petter Selasky
ca487c1888 Remove no longer needed ifdefs in the LinuxKPI, after r341787.
Differential Revision:	https://reviews.freebsd.org/D18450
Reviewed by:		kib@
MFC after:		3 days
Sponsored by:		Mellanox Technologies
2018-12-10 13:41:33 +00:00
Hans Petter Selasky
6402bc3d1e Use atomic_fcmpset_XXX() instead of atomic_cmpset_XXX() when possible
in the LinuxKPI.

Suggested by:	mjg @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2018-08-09 09:39:32 +00:00
Marius Strobl
e545f5a8a3 Update the list of architectures having atomic_fcmpset_{8,16,64}(9) and
atomic_swap_{64,int}(9) respectively as of r337433.
2018-08-07 18:59:02 +00:00
Hans Petter Selasky
a76c73aadc Don't refer to non-existing atomic functions, even though not compiled,
in the LinuxKPI.

Found by:		rpolka @
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2018-08-01 19:10:46 +00:00
Hans Petter Selasky
17e2a84e9a Rewrite code using atomic_fcmpset_int() in the LinuxKPI.
Suggested by:	mjg@
MFC after:	1 week
Sponsored by:	Mellanox Technologies
Sponsored by:	Limelight Networks
2018-06-06 15:31:47 +00:00
Hans Petter Selasky
23dcf4359e Implement the atomic_dec_if_positive() function in the LinuxKPI.
Submitted by:	Johannes Lundberg <johalun0@gmail.com>
MFC after:	1 week
Sponsored by:	Mellanox Technologies
Sponsored by:	Limelight Networks
2018-06-06 13:59:51 +00:00
Hans Petter Selasky
8f294983e9 Optimise xchg() to use atomic_swap_32() and atomic_swap_64().
Suggested by:	kib@
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2018-02-18 18:46:56 +00:00
Hans Petter Selasky
644680491e Fix implementation of xchg() function macro in the LinuxKPI.
The exchange operation must be atomic.

MFC after:	1 week
Sponsored by:	Mellanox Technologies
2018-02-18 17:37:23 +00:00
Hans Petter Selasky
af4010be77 Compile fix for GCC in the LinuxKPI.
Older versions of GCC don't allow flexible array members in a union.
Use a zero length array instead.

MFC after:	1 week
Reported by:	jbeich@
Sponsored by:	Mellanox Technologies
2018-02-17 08:12:35 +00:00
Hans Petter Selasky
2a7c2b914f Allow the cmpxchg() macro in the LinuxKPI to work on pointers without
generating compiler warnings, -Wint-conversion .

Requested by:	Johannes Lundberg <johalun0@gmail.com>
Sponsored by:	Mellanox Technologies
2018-02-16 15:20:21 +00:00
Hans Petter Selasky
62bae5d421 The LinuxKPI atomics do not have acquire nor release semantics unless
specified. Fix code to use READ_ONCE() and WRITE_ONCE() where appropriate.

Suggested by:		kib @
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2017-09-18 13:37:14 +00:00
Justin Hibbits
287e7a861a Add more #ifdef arch checks to the linuxkpi
arm, mips, and powerpc all implement pmap_mapdev_attr() and pmap_unmapdev(),
so add those archs to the checks.  powerpc also includes the atomic_swap_*()
functions, so add that to the supported list as well.  Not tested except by
compiling powerpc.

Reviewed by:	markj
2017-06-07 18:08:11 +00:00
Hans Petter Selasky
8293738e64 Function macros are preferred in the LinuxKPI.
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2017-03-23 13:28:16 +00:00
Mark Johnston
e5fe3ae2b4 Extend cmpxchg() to support 8- and 16-bit values, and add xchg().
These are needed to support updated revisions of the DRM code.

Reviewed by:	hselasky (previous version)
MFC after:	2 weeks
2017-03-22 17:33:57 +00:00
Hans Petter Selasky
622f2291e8 Implement more LinuxKPI atomic functions and macros.
Obtained from:		kmacy @
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2017-02-16 12:56:10 +00:00
Hans Petter Selasky
28a04a26b2 Allow passing a constant atomic_t to atomic_read().
Obtained from:		kmacy @
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2017-02-16 12:20:57 +00:00
Hans Petter Selasky
8457719578 Add more atomic LinuxKPI functions.
Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-11 07:58:43 +00:00
Hans Petter Selasky
fe68f570d4 Update and add various macros to the LinuxKPI and resolve a macro
redefinition issue in the cxgb driver.

MFC after:	1 week
Sponsored by:	Mellanox Technologies
Reviewed by:	np @
2016-01-26 15:26:35 +00:00
Hans Petter Selasky
29cbb3bef2 LinuxKPI atomic fixes:
- Fix implementation of atomic_add_unless(). The atomic_cmpset_int()
  function returns a boolean and not the previous value of the atomic
  variable.
- The atomic counters should be signed according to Linux.
- Some minor cosmetics and styling while at it.

Reviewed by:	alfred @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-01-21 17:52:55 +00:00
Hans Petter Selasky
8d59ecb214 Finish process of moving the LinuxKPI module into the default kernel build.
- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
  its subfolders.
- Update sys/conf/files and some Makefiles to use new file locations.
- Added description of COMPAT_LINUXKPI to sys/conf/NOTES which in turn
  adds the LinuxKPI to all LINT builds.
- The LinuxKPI can be added to the kernel by setting the
  COMPAT_LINUXKPI option. The OFED kernel option no longer builds the
  LinuxKPI into the kernel. This was done to keep the build rules for
  the LinuxKPI in sys/conf/files simple.
- Extend the LinuxKPI module to include support for USB by moving the
  Linux USB compat from usb.ko to linuxkpi.ko.
- Bump the FreeBSD_version.
- A universe kernel build has been done.

Reviewed by:	np @ (cxgb and cxgbe related changes only)
Sponsored by:	Mellanox Technologies
2015-10-29 08:28:39 +00:00
Renamed from sys/ofed/include/asm/atomic.h (Browse further)