Commit Graph

20 Commits

Author SHA1 Message Date
Hans Petter Selasky
8186b52744 Implement a series of physical page management related functions in
the LinuxKPI for accessing user-space memory in the kernel.

Add functions to hold and wire physical page(s) based on a given range
of user-space virtual addresses.

Add functions to get and put a reference on, wire, hold, mark
accessed, copy and dirty a physical page.

Add new VM related structures and defines as a preparation step for
advancing the memory map capabilities of the LinuxKPI.

Add function to figure out if a virtual address was allocated using
malloc().

Add function to convert a virtual kernel address into its physical
page pointer.

Obtained from:		kmacy @
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2017-03-27 17:04:11 +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
2bb46d5516 Define ATOMIC_LONG_INIT() in the LinuxKPI.
Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-26 10:03:22 +00:00
Hans Petter Selasky
44701cf732 Implement "atomic_long_add_unless()" in the LinuxKPI and fix the
implementation of "atomic_long_inc_not_zero()".

Found by:	ngie @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-23 16:19:51 +00:00
Hans Petter Selasky
fb2faed84e Define more copy to/from userspace functions in the LinuxKPI.
Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-23 12:52:22 +00:00
Hans Petter Selasky
4a0f827906 Add support for atomic_long_inc_not_zero() to the LinuxKPI.
Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-23 11:44:46 +00:00
Hans Petter Selasky
83d5d45ea2 Add more PAGE related defines to the LinuxKPI. Move the definition of
"pgprot_t" to "linux/page.h" similar to what Linux does.

Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-13 12:41:21 +00:00
Hans Petter Selasky
3a8bec33ef Fix handling of IOCTLs in the LinuxKPI.
Linux requires that all IOCTL data resides in userspace. FreeBSD
always moves the main IOCTL structure into a kernel buffer before
invoking the IOCTL handler and then copies it back into userspace,
before returning. Hide this difference in the "linux_copyin()" and
"linux_copyout()" functions by remapping userspace addresses in the
range from 0x10000 to 0x20000, to the kernel IOCTL data buffer.

It is assumed that the userspace code, data and stack segments starts
no lower than memory address 0x400000, which is also stated by "man 1
ld", which means any valid userspace pointer can be passed to regular
LinuxKPI handled IOCTLs.

Bump the FreeBSD version to force recompilation of all kernel modules.

Discussed with:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-12 11:38:28 +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
7652bc32f7 Use function macros when possible to avoid stray substitutions.
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-10 11:39:36 +00:00
Hans Petter Selasky
f2f5b1337e Add missing semicolon and properly wrap macro argument.
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-10 11:34:22 +00:00
Hans Petter Selasky
c7d81c66df Allow the argument for the cpu_to_xxxp() and xxx_to_cpup() macros to
point to a constant.

Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-05-10 11:31:00 +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
f919b7a664 Implement 64-bit atomic operations for the LinuxKPI.
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2016-01-21 17:56:23 +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
8e7baabc9f Make all the LinuxKPI include files compile standalone.
Sponsored by:	Mellanox Technologies
2015-11-03 12:37:55 +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