linux-toradex.git/arch/x86/include/asm/uv, branch v3.1

x86, UV: Correct UV2 BAU destination timeout

2011-06-21T12:50:34+00:00

Correct the UV2 broacast assist unit's destination timeout
period. And the activation status register in UV2 should be
tested for a destination timeout with a 4, not a 2.  The values
for Active versus Timeout were reversed.

This patch is critical for TLB shootdown on an Altix UV2 system
(i.e. the follow-on to the current Altix UV).

 Destination timeout period:
  The period is set in 4 bits of memory-mapped register MISC_CONTROL.
  The left bit toggles base period between 10us and 80us.
  The other 3 bits are the multiplier.
 Decimal 15, hex f, gives the maximum: 7 * 80us

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20110621122243.117324443@sgi.com
Signed-off-by: Ingo Molnar

x86, UV: Remove cpumask_t from the stack

2011-06-21T12:50:33+00:00

Remove the large stack-resident cpumask_t from
reset_with_ipi()'s stack by allocating one per uvhub.

Due to the limited size of the stack the potentially huge cpumask_t may
cause stack overrun.  We haven't seen it happen yet, but we need to make it
a practice not to push such structures onto the stack.

Signed-off-by: Cliff Wickman 
Reviewed-by: Pekka Enberg 
Link: http://lkml.kernel.org/r/20110621122242.832589130@sgi.com
Signed-off-by: Ingo Molnar

x86, UV: Rename hubmask to pnmask

2011-06-21T12:50:32+00:00

Rename 'bau_targ_hubmask' to 'pnmask' for clarity.

The BAU distribution bit mask is indexed by pnode number, not hub or
blade number.  This important fact is not clear while the mask is
called a 'hubmask'.

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20110621122242.630995969@sgi.com
Signed-off-by: Ingo Molnar

x86, UV: Inline header file functions

2011-06-21T12:50:31+00:00

Make all the functions in uv_bau.h inline so that it can
be included in the fake prom (used in simulations).

If not inlined the unused functions will generate compiler warnings.

Signed-off-by: Cliff Wickman 
Reviewed-by: Pekka Enberg 
Link: http://lkml.kernel.org/r/20110621122242.230529678@sgi.com
Signed-off-by: Ingo Molnar

x86, UV: Clean up uv_mmrs.h

2011-05-30T09:08:48+00:00

No code changes. Reformat definitions to make it more readable.

I fixed alignment of comments in the structure definitions.

Also aligned comments and most field definitions & values. Also
sorted the defines for the SHIFT & MASK values for each MMR.
This make the file visually much more acceptable.

Some of the symbol names are still quite long. The file is based
on post-processing of verilog definitions that are used for the
node controller chip design. Although some symbol names are not
what I would chose, I would like to maintain compatibility with
the names used by the chip designers. We have a number of
cross-reference utilities & having common names is important.

Signed-off-by: Jack Steiner 
Link: http://lkml.kernel.org/r/20110527145256.GA31224@sgi.com
Signed-off-by: Ingo Molnar 
--
 arch/x86/include/asm/uv/uv_mmrs.h | 2873 +++++++++++++++++++++-----------------
 1 file changed, 1600 insertions(+), 1273 deletions(-)

x86, UV: Clean up uv_tlb.c

2011-05-25T12:20:14+00:00

SGI UV's uv_tlb.c driver has become rather hard to read, with overly large
functions, non-standard coding style and (way) too long variable, constant
and function names and non-obvious code flow sequences.

This patch improves the readability and maintainability of the driver
significantly, by doing the following strict code cleanups with no side
effects:

 - Split long functions into shorter logical functions.

 - Shortened some variable and structure member names.

 - Added special functions for reads and writes of MMR regs with
   very long names.

 - Added the 'tunables' table to shortened tunables_write().

 - Added the 'stat_description' table to shorten uv_ptc_proc_write().

 - Pass fewer 'stat' arguments where it can be derived from the 'bcp'
   argument.

 - Function definitions consistent on one line, and inline in few (short) cases.

 - Moved some small structures and an atomic inline function to the header file.

 - Moved some local variables to the blocks where they are used.

 - Updated the copyright date.

 - Shortened uv_write_global_mmr64() etc. using some aliasing; no
   line breaks. Renamed many uv_.. functions that are not exported.

 - Aligned structure fields.
    [ note that not all structures are aligned the same way though; I'd like
      to keep the extensive commenting in some of them. ]

 - Shortened some long structure names.

 - Standard pass/fail exit from init_per_cpu()

 - Vertical alignment for mass initializations.

 - More separation between blocks of code.

Tested on a 16-processor Altix UV.

Signed-off-by: Cliff Wickman 
Cc: penberg@kernel.org
Link: http://lkml.kernel.org/r/E1QOw12-0004MN-Lp@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar

x86, UV: Add support for SGI UV2 hub chip

2011-05-25T12:20:13+00:00

This patch adds support for a new version of the SGI UV hub
chip. The hub chip is the node controller that connects multiple
blades into a larger coherent SSI.

For the most part, UV2 is compatible with UV1. The majority of
the changes are in the addresses of MMRs and in a few cases, the
contents of MMRs. These changes are the result in changes in the
system topology such as node configuration, processor types,
maximum nodes, physical address sizes, etc.

Signed-off-by: Jack Steiner 
Link: http://lkml.kernel.org/r/20110511175028.GA18006@sgi.com
Signed-off-by: Ingo Molnar

x86: Fix UV BAU for non-consecutive nasids

2011-05-12T21:45:42+00:00

This is a fix for the SGI Altix-UV Broadcast Assist Unit code,
which is used for TLB flushing.

Certain hardware configurations (that customers are ordering)
cause nasids (numa address space id's) to be non-consecutive.
Specifically, once you have more than 4 blades in a IRU
(Individual Rack Unit - or 1/2 rack) but less than the maximum
of 16, the nasid numbering becomes non-consecutive.  This
currently results in a 'catastrophic error' (CATERR) detected by
the firmware during OS boot.  The BAU is generating an 'INTD'
request that is targeting a non-existent nasid value. Such
configurations may also occur when a blade is configured off
because of hardware errors. (There is one UV hub per blade.)

This patch is required to support such configurations.

The problem with the tlb_uv.c code is that is using the
consecutive hub numbers as indices to the BAU distribution bit
map. These are simply the ordinal position of the hub or blade
within its partition.  It should be using physical node numbers
(pnodes), which correspond to the physical nasid values. Use of
the hub number only works as long as the nasids in the partition
are consecutive and increase with a stride of 1.

This patch changes the index to be the pnode number, thus
allowing nasids to be non-consecutive.
It also provides a table in local memory for each cpu to
translate target cpu number to target pnode and nasid.
And it improves naming to properly reflect 'node' and 'uvhub'
versus 'nasid'.

Signed-off-by: Cliff Wickman 
Cc: 
Link: http://lkml.kernel.org/r/E1QJmxX-0002Mz-Fk@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar

x86, UV: Fix NMI handler for UV platforms

2011-05-10T07:26:55+00:00

This fixes problems seen on UV systems handling NMIs from the
node controller.

I isolated the "dazed..." messages that I saw earlier to a bug in
the BMC on our platform. It was sending NMIs w/o properly setting
a register that indicated the source of NMI.

So rather than _assuming_ any unhandled NMI came from the UV system
maintenance console (SMC), add a check to verify that the SMC actually
sent the NMI.

Signed-off-by: Jack Steiner 
Cc: gorcunov@gmail.com
Cc: dzickus@redhat.com
Signed-off-by: Ingo Molnar

x86, UV: Initialize the broadcast assist unit base destination node id properly

2011-03-09T15:36:16+00:00

The BAU's initialization of the broadcast description header is
lacking the coherence domain (high bits) in the nasid.  This
causes a catastrophic system failure when running on a system
with multiple coherence domains.

Signed-off-by: Cliff Wickman 
LKML-Reference: 
Signed-off-by: Ingo Molnar